Tuesday, November 24, 2015

Tropical Storm In-fa Quickly Weakening in the Open Western Pacific

Jon Erdman
Published: November 24,2015

In-fa has weakened to a tropical storm in the western Pacific Ocean and may affect Iwo Jima later this week.
Here are the latest statistics, forecast path and satellite imagery on In-fa.
  • Location: At 0300 GMT Wednesday, the center of Tropical Storm In-fa was about 470 nautical miles southwest of Iwo Jima (Io Tō).
  • Movement: Generally toward the northeast. In-fa is rounding the western edge of the subtropical ridge of high pressure and becoming caught up in the jet stream, bending it sharply northeast, away from Taiwan and mainland Japan this week. In-fa could bring some rain and wind impacts as it moves near Iwo Jima as a tropical storm or tropical depression Wednesday into Thursday. Iwo Jima has a Japanese military presence, but no permanent population. The populated Ogasawara Islands of Japan could also see some rain and wind impacts from In-fa during that time period.
  • Intensity: Increasing wind shear in the week ahead should result in continued weakening trend as it speeds off to the northeast, whisked away by the jet stream.
  • Guam impacts: In-fa's center tracked more than 150 miles south of Guam with its closest pass. Andersen Air Force Base reported a couple of wind gusts from 40 to 45 mph Saturday. Rainfall amounts from the outer rainbands were generally 1.5 to 2 inches at both Andersen AFB and Guam International Airport.
  • Adding to the record: According to Colorado State University tropical expert, Phil Klotzbach, In-fa became the 24th tropical cyclone of at least Category 4 strength in the Northern Hemisphere this season, adding to the absolute pummeling of the previous record of 18 such storms in 1997 and 2004. In-fa has since weakened back to Category 2 intensity.
(MORE: Hurricane Central | Most Unusual Things in Tropics in 2015)

Status, Forecast Maps

Latest Position, Intensity, Movement

Forecast Path, Intensity

MORE: Typhoon Koppu/Lando Oct. 2015 (PHOTOS)

Multi-Day Flood Threat Begins Thanksgiving Day, But Severe Thunderstorm Risk Limited (FORECAST)

November 24,2015
Heavy rain and the risk of flooding will increase beginning Thanksgiving Day as Winter Storm Cara moves eastward across the U.S. There will be abundant moisture feeding into Cara, first from the Gulf of Mexico and later from a tropical cyclone now over the Pacific, raising the risk of torrential rainfall in parts of the south-central U.S.
(MORE: Next Winter Storm Blasts First Arctic Air of the Season into West, Plains)
However, the threat of severe thunderstorms will remain low through Thanksgiving week. A cool and stable environment has overspread much of the country behind Winter Storm Bella. While rich Gulf of Mexico moisture will return ahead of this week's storm, the atmosphere's temperature profile is not expected to be unstable enough to support severe thunderstorm development to any noteworthy extent.
(MORE: Winter Storm Bella Slams Midwest)
Severe Weather Forecast

Thunderstorm Forecast

Rainfall Forecast

  • No organized severe thunderstorm activity is expected as a relatively stable environment is forecast across the country.
  • A few thunderstorms, likely non-severe, may develop across portions of the southern Plains on Wednesday night.
Thanksgiving Day (Thursday)
  • Rain and thunderstorms will develop both ahead of and behind a cold front over a large part of Oklahoma and Texas.
  • At this time, it does not appear that the atmosphere will become unstable enough to support anything more than a rogue severe thunderstorm or two within a larger zone of ordinary showers and thunderstorms.
  • However, heavy rainfall may bring the risk of flash flooding from north Texas (including Dallas-Fort Worth) into Oklahoma, eastern Kansas and central to northwest Missouri.
  • Thunderstorms are expected in southern and eastern Texas but severe thunderstorms seem unlikely.
  • The chance for locally heavy rain and flooding will stretch from Texas through the mid-Mississippi Valley and into the eastern Great Lakes.
  • The flood risk will be enhanced from Iowa to southern Michigan due to the combination of heavy rain and melting snow.
Saturday and Sunday
  • Scattered thunderstorms are possible in southern Texas on Saturday but the severe weather threat will be minimal.
  • Rainfall will continue in Texas and Oklahoma, extending east across Arkansas and southern Missouri through the weekend, which will lead to the risk of flooding persisting across the region.
For specific tornado threat forecasts, check out the latest TOR:CON forecasts from severe weather expert, Dr. Greg Forbes.
Radar, Watches, Warnings

Current Radar with Watches and Warnings
Guide to Watches and Warnings
The radar map(s) above focus on the most likely areas for severe weather and/or flash flooding, if any. Maps update every five minutes; refresh this page for the latest image.
For radar and watch/warning information in other areas of the country, click on the links below.
(MORE: View National Interactive Radar Map | Difference Between a Watch and a Warning)

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MORE: Fall Tornado Outbreak of Nov. 21-23, 1992

Bizarre Thanksgiving Weekend: Ice Storm and a Hurricane

November 24,2015
An ice storm and a hurricane. They sound like they occupy completely opposite ends of the weather spectrum. If this were politics, one is like a far-left Democrat, the other a far-right Republican.
Yet for at least part of Thanksgiving weekend, you may see both on our weather map.

An Ice Event and a Tropical Cyclone
Before we go further, what is now "Sandra" in the eastern Pacific Ocean will not cause the freezing rain/sleet event we're forecasting in the Plains states, one facet of Winter Storm Cara.
However, you may wonder how these two disparate meteorological phenomena can at least exist at the same time in somewhat close proximity.

The Latest on Sandra














Sandra: Very Late

There have been only three other eastern Pacific storms of record dating to 1949 that formed later in the season than Sandra did on November 24. Sandra is the latest storm in the eastern Pacific since Hurricane Winnie was a December oddball in 1983.
El Niño seasons such as the one we're currently in typically feature lower wind shear over the eastern Pacific basin, which otherwise rips developing or active tropical cyclones apart.
Sandra formed in a relatively small window of lower wind shear, and also capitalized on water temperatures from 1 to 1.5 degrees Celsius above average to fuel its convection.
(MORE: Strong El Niño to Peak in Winter | 2015 Likely Globe's Hottest Year on Record)
If you booked a Thanksgiving getaway to Los Cabos or Mazatlan, I bet you didn't consider a tropical storm, as few would in late November.
Sandra will be steered to the north, then northeast toward Mexico, at least brushing Los Cabos, before moving into mainland Mexico this weekend.
(FORECAST: Latest on Sandra)
If it does remain intact as at least a tropical depression at landfall, it would be the latest landfalling eastern Pacific tropical cyclone in Mexico in the six-plus-decade database.
Sandra will become "sheared out" by the jet stream, thankfully, upon its approach to the Baja, so it should be weakening rapidly. However, a decent soaking rain is possible in the southern Baja peninsula and parts of mainland Mexico to the east with Sandra.
Percentage of observations by month due to freezing rain (black bars), sleet (hatched bars) and freezing drizzle (bars with horizontal tick marks) from 1976-1990 in U.S. and Canada.

Ice Event a Little Early

Winter Storm Cara, together with a potent plunge of Arctic air, will set the stage for sleet and freezing rain in the Plains, possibly as far south as parts of West Texas and eastern New Mexico.
(FORECAST: Winter Storm Cara Snow/Ice)
A 2003 study by Stanley Changnon and Thomas Karl of freezing rain in the Lower 48 States from 1948-2000 found December or January to be the peak months for ice events in the Plains region targeted by Winter Storm Cara.
One year later, a second study lead by John Cortinas of the University of Oklahoma examining the U.S. and Canada together over a 15-year period from 1976-1990 found November only was fifth behind January, December, February and March in the distribution of all observations with freezing rain.
Of course we're less than a week away from December, but this ice event does skew early, climatologically speaking.
Again, it doesn't appear much, if any, of Sandra's remnant moisture will ever make it up to "seed" the ice event, as it were. Most of that moisture gets wrung out over Mexico or gets drawn well to the east-northeast perhaps contributing to heavy rainfall in parts of the southern Plains and Lower Mississippi Valley.
So, a very late tropical cyclone plus an early ice event is leading to this potentially bizarre holiday weekend weather potpourri.
Seeing the potential for Sandra to still be a tropical depression early Saturday as little as 500 miles away from an area of freezing rain is a cool, weather geeky factoid you can share either while trying to keep your relatives awake after Thanksgiving dinner or while standing in a long line on Black Friday.
And, by the way, if you think hurricanes can't feed into winter storms, remember Superstorm Sandy's wintry side just over three years ago?
Jonathan Erdman is a meteorologist at weather.com and has been an incurable weather geek since a tornado narrowly missed his childhood home in Wisconsin at age 7. Follow him on Twitter and Google Plus.

MORE: Hurricane Patricia Hits Mexico Oct. 2015 (PHOTOS)

Hurricane Sandra Becomes Second Latest Eastern Pacific Hurricane on Record

November 24,2015
Sandra became the eighteenth named storm of the 2015 eastern Pacific hurricane season early Tuesday morning and was upgraded to a hurricane Tuesday night. Not only is Sandra one of the latest named storms on record, but it is now rare late-season hurricane, and, while later weakening, may limp ashore in Mexico this weekend.
Here is the latest information on Sandra as of 10 p.m. EST Tuesday:
  • Location: About 540 miles south-southwest of Manzanillo, Mexico.
  • Movement: Toward the west-northwest now, but expected to slow down and turn north by Thursday, then accelerating toward the northeast. Sandra may brush the southern Baja California peninsula near Cabo San Lucas early Saturday, then should move into Sinaloa, Durango or Chihuahua states later this weekend in a weakened state.
  • Intensity: Now strengthening quickly, Sandra has maximum sustained winds of 75 mph. It's forecast to become a major hurricane on Thursday, which would make it the latest major hurricane on record in the eastern Pacific. It then will weaken quickly after getting caught up in the subtropical jet stream. Sandra may weaken to a tropical storm or depression before brushing Cabo San Lucas, and could be a depression or even remnant low before ever making a landfall in mainland Mexico this weekend.
  • Impacts: Despite a later weakening trend, locally heavy rain and flash flooding are possible in the southern Baja California peninsula as soon as Friday and in the above-mentioned Mexican states where Sandra limps ashore Saturday. Some moisture from Sandra may also pump into a heavy rain and ice event (Winter Storm Cara) in the southern Plains of the U.S. 
  • Rarity: Only three other eastern Pacific storms have formed later in the calendar than Sandra in records dating to 1949. Hurricane Sandra became the second latest forming hurricane on record, behind Hurricane Winnie in 1983. Furthermore, there is no record of an intact depression or named storm making a landfall on either Baja California or Mexico's Pacific coast so late in the season.
(MORE: Hurricane Central | Most Unusual Things in Tropics in 2015)

Latest Storm Information and Projected Path

Satellite and Storm Information

Projected Path and Intensity
MORE: Hurricane Patricia (PHOTOS)

Late-Season Tropical Storm Sandra Could Strike Mexico and Drench Texas

By: Jeff Masters and Bob Henson , 4:05PM,GMT on November 24,2015

Tropical Storm Sandra formed on Tuesday morning in the record-warm Pacific waters off the south coast of Mexico, about 570 miles south of Manzanillo. Sandra joins last week's Tropical Storm Rick as one of the latest-forming tropical storms in the history of the Eastern Pacific. Since accurate records began in 1949 (with higher-quality satellite records beginning in 1971), the Eastern Pacific has seen only six tropical storms form after November 18: December 5, 1983 (Winnie), November 27, 1971 (Sharon), November 27, 1951 (Unnamed), November 24, 2015 (Sandra), November 20, 2011 (Kenneth), and November 19, 2015 (Rick). None of these storms hit land. If Sandra hits land, it will be the latest landfalling Eastern Pacific storm on record.

Satellite images on Tuesday morning showed that Sandra had a large and steadily organizing area of heavy thunderstorms. Steering currents favor a path to the west or west-northwest parallel to the coast and far enough offshore to prevent heavy rains in Mexico through Thursday. On Friday, a trough of low pressure passing to the north of Sandra will turn the storm to the north and northeast, but will also bring high wind shear, weakening the storm as it approaches the tip of the Baja Peninsula.

Conditions are quite favorable for Sandra to intensify over the next couple of days, with record-warm sea surface temperatures of 29-30°C (84-86°F) and wind shear of less than 10 knots beneath an upper-level high arcing around the storm. The official NHC forecast issued at 10 am EST Tuesday brings Sandra to Category 2 strength, with peak winds of 100 mph by Thursday. NHC’s Rapid Intensification Index shows roughly a 50-50 chance that Sandra will strengthen by at least 30 knots in the next 24 hours. If Sandra does reach Category 2 strength, it will be the strongest Eastern Pacific hurricane known to exist so late in the year. All of the six cyclones above were tropical storms or Category 1 hurricanes except for Kenneth, which hit Category 4 strength on November 24, 2011. Kenneth is the latest-occurring major hurricane in Eastern Pacific records.

Figure 1. Latest satellite image of Sandra.

With Sandra virtually certain to be a tropical storm or hurricane on Thanksgiving Day, this year will mark the first time NHC has ever had to issue Thanksgiving Day advisories for an Eastern Pacific named storm. However, NHC has issued Thanksgiving Day advisories for Atlantic storms on a number of occasions. The last time was November 24 during the year--you guessed it--2005, during the insane Hurricane Season of 2005, when Tropical Storm Delta was active during Thanksgiving weekend in the far eastern Atlantic.

Sandra may complicate heavy rain threat over Southern Plains
The biggest impacts from Sandra may occur from Texas to Arkansas, where a prolonged heavy rain episode late this week seems likely to be enhanced by Sandra’s remnants. A strong upper-level low settling over the U.S. Southwest will help pull Sandra northeastward, and the storm’s moisture will flow atop a very shallow cold air mass that will spill across the Southern Plains later this week. Such setups involving Eastern Pacific hurricanes are notorious for giving the region some of its heaviest rains on record, but they are far more typical of September or October than late November. Localized flooding may become a major travel headache, as rainfall totals of 3-8” are expected from Thursday through Sunday over central and north Texas, southeast Oklahoma, southern Missouri, and northwest Arkansas (see Figure 2 below). These rains will fall over areas that have been doused repeatedly over the last few months. With 50.75” of rain for the year through Tuesday morning, Dallas-Fort Worth area may well break its all-time annual precipitation record of 53.54” (set in 1991) before November is done.

On the northwest edge of the heavy rain swath, there should be a parallel strip with low-level temperatures cold enough for mostly light but widespread freezing rain, sleet, and/or snow, with an initial round from Thanksgiving Day into Friday and perhaps a second batch over the weekend as another lobe rotates around the sprawling upper-level low. Frozen precipitation is most likely from the Texas Panhandle and northwest Oklahoma across much of Kansas to eastern Nebraska.

Wunderblogger Steve Gregory has a new Monday afternoon post, Stormy Thanksgiving / Potential Flash Flooding and Blizzard Conditions for Texas.

Jeff Masters and Bob Henson

Figure 2. Projected 5-day precipitation totals (rain and melted snow/sleet) for the period from 7 am EST Tuesday, November 24, through Sunday, November 29.

This Date in Weather History for November 24,2015 from weatherforyou.com

Weather History
For Tuesday,November 24,2015
1812 - Southwesterly winds of hurricane force sank ships and unroofed buildings at Philadelphia and New York City. (David Ludlum)
1863 - The battle above the clouds was fought on Lookout Mountain near Chattanooga. Pre-frontal clouds obscured the upper battle- field aiding a Union victory. (David Ludlum)
1950 - The temperature at Chicago, IL, dipped to 2 below zero to equal their record for the month established on the 29th in 1872. On the first of the month that year Chicago established a record high for November with a reading of 81 degrees. (The Weather Channel)
1982 - Hurricane Iwa lashed the Hawaiian Islands of Niihau, Kauai, and Oahu with high winds and surf. Winds gusting to 120 mph caused extensive shoreline damage. Damage totalled 150 million dollars on Kauai, and fifty million dollars on Oahu. The peak storm surge on the south shore was six to eight feet. It marked the first time in 25 years that Hawaii had been affected by a hurricane. (The Weather Channel)
1987 - Showers and thunderstorms produced heavy rain in southern Missouri, southeast Kansas and northeastern Oklahoma. Flooding was reported in Greene County of southwestern Missouri. Springfield MO was drenched with more than six inches of rain. Thunderstorms over southern Texas produced more than eight inches of rain in Caldwell County and Hayes County, and thunderstorms over south central Oklahoma produced one inch hail at Temple twice within an hour. (The National Weather Summary) (Storm Data)
1988 - Low pressure brought heavy snow and high winds to the Northern and Central Rockies. Snowfall totals in Colorado ranged up to 40 inches at Wolf Creek Pass, with 27 inches falling in 24 hours. Telluride CO received 32 inches of snow, and winds atop Mines Peak gusted to 95 mph. (The National Weather Summary) (Storm Data)

Two Magnitude-7.6 Earthquakes Strike Eastern Peru

By Kevin Byrne, AccuWeather.com Staff Writer
November 24,2015; 10:44PM,EST
Two powerful 7.6-magnitude earthquakes struck near the Peru-Brazil border region within five minutes Tuesday evening.
The first temblor occurred shortly before 6 p.m. local time Tuesday evening, the U.S. Geological Survey said. It was initially recorded as a 6.9 before being upgraded to 7.5 and eventually 7.6.
The quake occurred 107 miles west-northwest of Iberia, Peru, and 423 miles east-northeast of the capital of Lima. The second quake was centered 130 miles (210 km) south of Tarauaca, Brazil.
There were no threats of tsunamis because the earthquakes were too deep, the Pacific Tsunami Warning Center said. The depths were 373.2 miles (600.6 km) and 380.1 miles (611.7 km), respectively.
There was no immediate word of damage or injuries, but Reuters reported that the quake occurred in a sparsely populated jungle region and was unlikely to cause major damage.
The weather across Eastern Peru is currently very warm and humid, said AccuWeather Meteorologist Randy Adkins. It will remain dry and sunny into Wednesday, he added.

Atlanta: Rainy November to Culminate With Dry Thanksgiving Week

By Mario Marroquin, AccuWeather.com Staff Writer
November 24,2015; 10:42PM,EST
While Atlanta has received above-average rainfall so far this month, dry and calm conditions are forecast for the area this week.
A high pressure system will be centered over the region, keeping the stormy weather from the Southern Plains at bay. This system will also be responsible for the above-average temperatures and clear skies until Saturday.

Daytime temperatures will remain in the mid-60s Fahrenheit until Friday.
Evening temperatures are set to vary, increasing from the mid-40s in the midweek into the low 50s by Thanksgiving.
Sunday's Falcons game against the Vikings may see some rain, as the high pressure system exists the region and allows for clouds and showers to move in during the late afternoon hours. A permeable jacket or umbrella is advised for those planning to tailgate prior to the game.
Thanksgiving Travel Forecast: Snow to Disrupt Travel From California to Minnesota
WATCH: NOAA Satellite Shows Snowstorm From Space
Black Friday Forecast: Storm May Pester Shoppers From Texas to Michigan

The average high for this time of the year is in the low 60s with a low in the low 40s, making this week an average one in terms of temperature.
Atlanta has seen almost 8 inches of rain in November, which is nearly twice the average for the month.

Warmth to Surge Across Northeast US for Thanksgiving, Black Friday

By Brett Rathbun, AccuWeather.com Meteorologist
November 24,2015; 10:40PM,EST
Compared to Thanksgiving Day in 2014, this Thanksgiving will be substantially warmer in the Northeast.
The warm-up will follow a chilly start to the week.
A Mild Thanksgiving in Store for Millions in the East
Last year, a snowstorm brought significant snowfall across the Northeast on Wednesday, causing travel nightmares for anyone on the road and a chilly, white Thanksgiving for millions.
Afternoon temperatures during Thanksgiving 2014 ranged from the upper 20s near the Canada border to the upper 40s in Virginia.
This year, dry conditions and sunshine will be in store across the East into Black Friday.
"High pressure overhead will allow for plenty of sunshine, dry conditions and milder air into Black Friday," AccuWeather Meteorologist Evan Duffey said.

High temperatures will be between 10 and 15 degrees above average and around 20 to 30 degrees higher than last Thanksgiving.
Many spectators may be able to shed winter coats and hats part of the way through the Macy's Thanksgiving Day Parade in New York City or other parades in the region. Sunglasses will be needed.
With this stretch of mild weather, the potential will remain for this month to be the warmest November on record for many Northeast cities.
Top Five Thanksgiving Day Parades: Warmth to Greet NYC Spectators
Thanksgiving Travel Forecast
Black Friday Forecast

Those traveling on the road or in the air across the East will not have to worry about any weather-related delays on Wednesday or Thanksgiving. Those traveling to the Western states may have to contend with flight delays due to a snowstorm.
While mild conditions will continue into Black Friday, a storm system will approach the region on Friday into Saturday, bringing a period of rain.

Rain will fall from northern New England to the Ohio Valley on Friday morning before advancing across much of the Northeast during the afternoon.
Rain may hold off along and east of the Interstate 95 corridor until Friday night.
The mild conditions will be short-lived as a shot of cooler air will build across the region for the weekend.
Heavier jackets will be needed for anyone going outside to put up lawn decorations for the Christmas holiday or heading to college or NFL football games.
Rain will return early next week.

Sandra to Bring Flooding Risk to Northern Mexico

By Eric Leister, Meteorologist
November 24,2015; 10:37PM,EST
Hurricane Sandra, located hundreds of miles southwest of Mexico, is becoming better organized and will likely impact Mexico later this week.
A continued track toward the west-northwest is expected through Wednesday before a large storm moving across the western United States pulls the tropical system northward during the second half of the week.

This sharp turn northward will bring a potent hurricane toward the southern Baja California Peninsula on Friday and Saturday.
The storm tracking over the western half of the United States will pull tropical moisture northward, resulting in downpours across southern Baja California and northern Mexico from Friday into Saturday.
Additional strengthening is expected to occur through Thursday and Sandra could become a major hurricane on Thanksgiving Day. However, the tropical cyclone will encounter strong wind shear as it approaches Mexico which will lead to rapid weakening through the rest of the week.
While Sandra will likely be weakening as it approaches the southern tip of Baja California Friday night and Saturday, locally damaging winds are a concern from La Paz and Cabo San Lucas to Culiacan and Mazatlan.
Mexico Weather Center
East Pacific Hurricane Center
Detailed Forecast for Cabo San Lucas

The biggest concern will be heavy rainfall that can cause flash flooding and mudslides. Areas at greatest risk for flooding include southern Baja California, Sinaloa, northern Durango and Chihuahua states.
Rainfall amounts of 75-150 mm (3-6 inches) are possible in these areas with local amounts up to 250 mm (10 inches).
After reaching the Mexico coastline, the weakening tropical cyclone will dissipate over the higher terrain of northern Mexico, while the heaviest rainfall shifts into the southern Plains of the United States where there will be a high threat for flooding early next week.

India: Brief Reprieve From Flooding Rain; Another Storm Looming

By Eric Leister, Meteorologist
November 24,2015; 10:33PM,EST
Rainfall has been relentless across southern India this month resulting in multiple events of flooding from Chennai to Kochi.
Through Nov. 23, Chennai has reported more than 965 mm (38.00 inches) of rain, roughly 300 percent of the normal rainfall expected for the entire month of November.
There has only been three days so far this month with no rainfall reported in the city.
A push of dry air from the northeast will finally bring a break from the persistent wet weather with little to no rainfall in the forecast for southern India through Friday.

The most likely area to see a few showers will be across southern Tamil Nadu and Kerala; however; no heavy rainfall is expected.
The dry weather will hold over much of southern India through Friday with a mixture of clouds and sunshine each day.
The dry weather will not last, however, as yet another surge of tropical moisture will arrive from the Bay of Bengal as early as Saturday.
India Weather Center
Detailed Forecast for Mumbai
El Nino-Fueled Drought May Cause More Destructive Wildfires to Ignite Across Indonesia During Winter

This moisture will renew downpours across Sri Lanka and the east coast of India from Tamil Nadu into southern Andhra Pradesh on Saturday.
Downpours will spread across all of southern India on Sunday and Monday, though the heaviest rainfall will likely remain near the coast from Chidambaram northward to Machilipatnam.
The potential exists for development of a tropical cyclone to the east of Chennai in the Bay of Bengal early next week.
At this time, it appears the heaviest rainfall will shift northward during the middle of next week; however, anyone living along or near the east coast of India would closely monitor this situation.

Cold Storm to Bring White Thanksgiving to Portions of Western US

By Brett Rathbun, AccuWeather.com Meteorologist
November 24,2015; 10:22PM,EST
Rain, snow and cold air will return to the Northwestern states into Thanksgiving.
A storm system will dive southward along the West Coast into Tuesday night before tracking eastward across the Rockies during Wednesday into Thanksgiving Day.
The strength and track of this storm system will determine which locations receive the heaviest snowfall on the cold side of this system.
The amount of moisture available with this system will be much less than the previous storms this month across the Pacific Northwest. While much of the lower elevations will deal with periods of rain through Tuesday, the threat for flash flooding will be low.
Winterlike Storm Begins to Invade West
Much of the precipitation along the Interstate 5 corridor from Seattle to Portland, Oregon, will be in the form of rain into Tuesday night.
A steady snow will blanket the Oregon Cascades. Significant snowfall will also occur across the Bitterroot Mountains of Idaho and western Montana as well as the Sierra Nevada.
As this system tracks south and east this week, a shot of cold air from Canada will dive across the region behind this storm. This will allow snowflakes to make an appearance across some of the lower elevations for the first time this season.

"The low elevations east of the Cascades have an opportunity to receive accumulating snow into Wednesday, especially in eastern Oregon," AccuWeather Senior Meteorologist Kristina Pydynowski said.
Check AccuWeather MinuteCast® for Your Location
Northwest Interactive Radar
Black Friday Outlook: Will Wintry Weather Put a Dent in Sales This Year?

Those traveling for Thanksgiving across the Northwest through Tuesday should give yourself extra time to reach your destination as roads will be wet or perhaps snow-covered and icy.
Anyone waiting to travel on Wednesday should see improving conditions across the Pacific Northwest as the storm will set its sights across the northern and central Rockies into Nevada. Those traveling in these areas may want to consider leaving before Wednesday before the storm approaches.
"The snow will focus on the corridor from Montana and Wyoming to eastern Oregon and the Sierra on Wednesday," Pydynowski said.

Plowable snow could accumulate across the northern Rockies including Billings, Montana; Casper, Wyoming; and Salt Lake City on Wednesday into Wednesday night.
The best opportunity for snowflakes to make an appearance in Boise, Idaho, is on Wednesday. Snow is expected to accumulate mainly on non-paved surfaces, but roads could become snow covered.
Overnight low temperatures will plunge near or below freezing across much of the Western states into Thanksgiving. Locations along the Pacific Coast will remain above freezing.
Anyone traveling after dark will need to use caution as wet roads could start to freeze.

Daytime high temperatures across much of the northern and central Rockies will fail to reach the freezing mark on Wednesday and Thursday. This will not allow all of the snow that falls this week to melt before the Thanksgiving holiday.
Those flying for the holiday across the West should keep checking your airline for any possible delays or cancellations.
Snow showers could continue to occur across portions of the central Rockies on Thanksgiving Day.

Spain: Mild Through Friday, Showers Continue in the North

By Eric Leister, Meteorologist
November 24,2015; 10:20PM,EST
Comfortable weather is expected across most of Spain on Thursday and Friday as high pressure over the Atlantic Ocean dominates much of the country.
The exception will be northern Spain where a northerly flow off the Atlantic Ocean will result in showers, more clouds and slightly lower temperatures.
Areas most likely to have showers on Thursday and Friday include Dijon, Santander, Bilbao and San Sebastian.

Elsewhere across Spain, there will be partly to mostly sunny skies and above-normal temperatures as mild air remains entrenched over the region.
Outside of the high elevations, temperatures will range from 13-16 C (55-60 F) in central Spain and 16-19 C (60-67 F) in southern Spain both Friday and Saturday.
Spain Weather Center
MinuteCast® for Your Location
Interactive Spain Weather Radar

Spotty showers are also possible across the Balearic Islands, though much of the time it will remain dry with at least some sunshine.
A weak cold front will continue the threat for showers in northern Spain on Saturday while dry and pleasant weather continues for another day across the remainder of Spain.

World Weather Hot Spot for November 24-25,2015 from accuweather.com

Chennai,India: Severe weather;more than 5 inches of rain fell in heavy thunderstorms in just 6 hours on Monday (November 23,2015)

WeatherWhys for November 24,2015 from accuweather.com

Late autumn can be a very windy time of the year. The reason for this is that the jet stream is stronger and farther south this time of the year. Surface storms are also stronger, so when the winds at the surface and aloft align, it can get very windy.