December 13, 2019

Dec 13(Fri)

A variety of weather in the area. The classic ice zones got some light glaze, the valleys on the east side of the Mts picked up a quicker glaze in the morning that lead to very slick conditions. Temps varied as you’ll see below and the RTMA gives a good handle. Some deeper colder valleys held below 32.

Bittinger 2nw Valley

MIN[22.5]—MAX[34.0]—AVERAGE MEAN[28.2]—TRUE AVERAGE[29.4]

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Snowfall season to date 12.3″

Garrett College

MIN[23.2]—MAX[38 4]—AVERAGE MEAN[30.8]—TRUE AVERAGE[31.8]—PRECIP[.07]

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Canaan Heights/Davis 3SE

MIN[25.0]—MAX[44.0]—AVERAGE MEAN[34.5]—PRECIP[T]7am

Snowfall season to date 20 5″

Climate Reference Network Canaan

MIN[24.6]—MAX[45.3]—AVERAGE MEAN[34.9]—TRUE AVERAGE[37.3]—PRECIP[.11]

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Cabin Mt at Bald Knob

MIN[28.6]—MAX[42.8]—AVERAGE MEAN[35.7]—TRUE AVERAGE[36.1]—PRECIP[.13]

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Cabin Mt-Western Sods

MIN[20.7]—MAX[43.2]—AVERAGE MEAN[31.9]—TRUE AVERAGE[35.6]—PRECIP[.14]

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Spruce Knob

MIN[18.9]—MAX[39.2]—AVERAGE MEAN[29.0]—TRUE AVERAGE[32.3]—PRECIP[.16]

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Snowshoe

MIN[20.8]—MAX[43.0]—AVERAGE MEAN[31.9]—TRUE AVERAGE[34.5]

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Canaan Valley Refuge

MIN[16.3]—MAX[45.7]—AVERAGE MEAN[31.0]—TRUE AVERAGE[36.5]

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7Springs

MIN[21.0]—MAX[36.0]—AVERAGE MEAN[28.5]—TRUE AVERAGE[28.6]

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Cumberland Airport

MIN[25.7]—MAX[33.0]—AVERAGE MEAN[29.3]—TRUE AVERAGE[30.2]

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The Valley vs Cabin Mt

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Canaan area temps

Comparison view

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RTMA

Radar

Satellite

Flow

(Forgot to download from the nullschool site, so a different version today since nullschool does not archive)

Surface features and 500mb height anomalies and flow

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pics today-

Lavale to Frostburg

Cold air loves to hang in these low valleys in this area after a departing cold air mass in place

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Savage Mt area

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Grantsville to Bittinger area

Initial very light glaze, high valleys held cold. Not as good as the deeper valleys do, but the high valleys still cooler than the high ground from in this area and west

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Deep Creek Lake

Smooth area is a thin ice cover

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Cranesville area

Far enough west, not nearly as ice prone in these setups

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The Yough-Sang Run

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Colder Deep Valleys east

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Late evening update: 12/13/19

Some quick views of the latest model guidance for snowfall that begins first in the Wv high ground midday, early afternoon tomorrow, early to mid afternoon north of Canaan.

Overall looks like a 3-6″ event Wv high ground, as always I lean low to mid and allow for a good performance to achieve the high en .

2-4″ Garrett, Preston into the Southern Pa high ground.

18z ECMWF

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18z GFS

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12z Canadian

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Some very bizarre wording from the Pitt NWS. As great as their service has been early on this season, the past few days has just been a tad strange. The misunderstanding of how the ice setup this morning works, now this…

Freezing rain possibly mixed with a snow shower tomorrow night, 1-3″????!!! That may be the first in recorded history for the area.

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For Garrett… lots of areas colder than forecast mins for daytime maxes today. Temps slow to rise overnight…the mins are and will be colder than forecast.

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Charleston more in line with modeling on their end

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