Friday, June 10, 2016

June Snow Blankets Alaska's North Slope, Mt. Washington, New Hampshire

Tom Moore
Published: June 10,2016

It's June, and parts of the U.S. are bracing for record heat – but there are a few locations where a winter chill is in the air and snow is flying.
Winter storm warnings were posted for northeast Alaska's Brooks Range, where the National Weather Service anticipated 4 to 9 inches of total snow through Friday.

❄️Snow❄️? The calendar may say that it is June; however, snow is expected today on the North Slope ☃.
Above: A snowfall forecast posted by the National Weather Service office in Fairbanks, Alaska, on June 9,2016.According to Alaska 511, heavy snow was reported on the Dalton Highway between Sagwon and Deadhorse early Friday, with some snow reportedly sticking on the road.
Wednesday and Thursday, snow fell along the Arctic coast, including the cities of Barrow and Katovik.
It's snowing in June in my Mom's village of Kaktovik. Very unusual weather. Photo by Tori Sims.

America's northernmost city, Barrow, Alaska, picked up 1.7 inches of snow on Thursday, June 9, the largest daily June snowfall in just over 35 years, since a June 7,1981 snowfall of 3.2 inches.
It was also the sixth highest June daily snowfall on record, there, according to the National Weather Service.
Yep, that's on the ground in Barrow, now, per UAF Sea Ice Cam. They average 0.7" snow each June.

Despite that, snow along the Arctic coast of Alaska is not that rare in June.
Most locations average about an inch of snow for the month. This year, however, it's somewhat of a surprise, considering how mild conditions have been.
Alaska weather blogger Dr. Richard James noted wet snow was even observed Thursday in the village of Umiat, about 165 miles southeast of Barrow.
James blogged that this is rather unusual in Umiat in June, with measurable snow only occurring in five other Junes of record since 1946.

Upper-Level Trough Over Northern Alaska Producing Wintry Conditions

This snow was brought about by a trough (dip in the jet stream) over northern Alaska, allowing cold temperatures to prevail. Within the trough, an area of low pressure formed just north of the state. The low and attendant cold front was responsible for lifting moist air at the surface, which produced clouds and snow.
With a building ridge over western and central Canada, the low was blocked from moving very much.
NOAA's National Centers for Environmental Information just announced that Alaska had their warmest spring (March-April-May) on record.
With all of the warm temperatures across Alaska over the past few months, it didn't seem like wintry conditions would ever return, at least not in June. On the Arctic coast, Barrow has recorded above average temperatures for every month in 2016, and just chalked up a daily record high Monday, reaching 51 degrees.
(MORE: Spring 2016 Was Warm and Wet in the United States: Alaska Shatters Spring Record)
View image on Twitter
From , had the warmest spring of record this year, smashing the previous warmest set in 1998.

The upper-level pattern in the atmosphere had featured frequent ridges of high pressure (bulges in the jet stream) that have produced the warmth over the past few months across Alaska.

Down In The Lower 48

If you would like to find wintry conditions this late in the season down in the Lower 48 states, look no further than at Mount Washington, New Hampshire.
The Mount Washington Observatory, where winds howl and snow falls most months of the year, sits at an elevation of 6,288 feet.
It has been quite wintry over the past couple of days, thanks to the aforementioned sharp southward dip in the jet stream.
Wednesday and Thursdsay, a total of 1.8 inches of snow was measured at the observatory, accompanied by average wind speeds from 55-66 mph, according to observatory records.
Another icy start to the day. Good news-warmer wx for Saturday. http://ift.tt/1tg7XUt 

A peak wind gust to a whopping 100 miles per hour was clocked during that time, and temperatures were stuck in the 20s all day Thursday. Wind chills dipped to around 0 degrees early Thursday morning atop the summit.
Glaze/rime ice grows into the wind. This is the ice on our @MWObs instrument tower this a.m.

Snow showers there are not that uncommon in June. Average June snowfall is only 1 inch. In 1988, a June record 24-hour total of 5.1 inches fell atop the summit, and a June monthly record of 8.1 inches fell in 1959.
The average high temperature in June is around 50 degrees with a typical low in the upper 30s. June temperatures have tumbled as low as 8 degrees in 1945, and have rocketed as high as 72 degrees in 2003.
Typical sustained winds atop Mt. Washington in June are about 27-28 mph. A wind gust to 136 mph was once measured at the summit in June 1941.
You have to be a hearty soul, like the weather observers there, to endure these harsh conditions.
MORE: Mt. Washington Photos

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