Published: November 13,2016
Changes are ahead for a large part of the country, as the warm spell most of us have been seeing this month will finally come to an end. In fact, a winter storm may shake things up for the nation's midsection and bring cooler temperatures and potentially some rain to the South.
Below we take a closer look at the four things you need to know about the weather as we move through mid-November.
1. Mild Temperatures To Start the Week in Western, Central States
High temperatures will start out 10 to 30 degrees above average on Monday and Tuesday from the interior West into the Plains and Midwest. This correlates to temperatures in the 60s as far north as Pierre, South Dakota, and Billings, Montana.(MORE: November Record Highs Smashed as 70s Surge Northward Into Canada)
The core of the warmest temperatures will swing from the northern Plains to the upper Great Lakes by late week. Temperatures will climb into the low- to mid-60s across much of Michigan on Friday.
Forecast Highs Tuesday
2. East Coast Low Will Bring Wet Weather
A low-pressure system developing near the coast of the Carolinas will race up the East Coast Tuesday into Wednesday.This quick-moving low-pressure system brought some welcomed rainfall to the drought areas of eastern Georgia and the western Carolinas on Sunday.
Rainfall Forecast and Drought Areas
Rainfall totals in these areas won't be all that high, but any rain is welcomed.
Northeast Rainfall Forecast
One more opportunity for rainfall in the Southeast will occur later this week.
(FORECAST: Atlanta | Morehead City, North Carolina | Atlantic City, New Jersey | Boston)
3. The Quiet Pattern Is Finally Going To Change
The northern jet-stream pattern, which has been stuck in the northern tier of this country for the better part of three weeks, will finally give way to a more stormy period this week.The first part of the week will start with more of the same – wet weather for the Pacific Northwest – but a butterfly from across the big pond will cause a transition by midweek.
Evolution of this week's weather pattern.A low-pressure system developing off the coast of Japan is forecast to move across the Pacific at a more southerly latitude than other recent low-pressure areas, which have traveled across the Gulf of Alaska and the Aleutian Islands.
This low-pressure system will become a robust trough, or southward dip in the jet stream, well south of Alaska. As this trough gains strength, it will carve a ridge of high pressure into the upper-level flow near the West Coast.
As a result, the current pattern featuring a ridge of high pressure in the central states and a southward dip in the jet stream in the East will come to an end by late week.
This will allow cooler air and gusty winds to spill across the border into the western and central U.S. late week.
(FORECAST: Seattle | Portland, Oregon | Los Angeles)
4. Winter Storm Likely Toward the End of the Week
Just ahead of the ridge formation in the West, a band of energy will cross the Rockies. Assisted by flow from the Northwest, this energy will spin down and become a "lee cyclone." This type of cyclone commonly becomes a trouble maker for the eastern half of the country.(MORE: Winter Storm to Bring First Accumulating Snow to Parts of the Northern Plains, Upper Midwest)
This system should be sufficiently cold to dump snowfall along its journey in parts of the northern Plains and upper Midwest, in addition to blanketing the mountain West with some sorely-needed early-season snowfall.
Thursday's Forecast
If this storm can attain enough energy to produce a strong cold front, it may be able to bring rain to the South late this week.
(FORECAST: Chicago | Des Moines, Iowa | Minneapolis)
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