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KF5JRV > W 30.12.17 14:26l 59 Lines 2810 Bytes #999 (0) @ USA
BID : 2532_KF5JRV
Read: GUEST
Subj: NWS USA WX Forecast 12/30
Path: IZ3LSV<I0OJJ<N6RME<N0KFQ<KF5JRV
Sent: 171230/1216Z 2532@KF5JRV.#NWAR.AR.USA.NA BPQ6.0.14
Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
255 AM EST Sat Dec 30 2017
Valid 12Z Sat Dec 30 2017 - 12Z Mon Jan 01 2018
...Reinforcing shot of arctic air could bring record low temperatures to
parts of the Midwest and the East Coast on New Year's Day...
...Moderate to heavy lake effect snows will continue downwind of the Great
Lakes...
...Heavy snowfall over the higher terrain of the Northwest should taper
off tonight...
The bitter cold weather will continue to be the story across much of the
U.S. through this weekend as a strong high pressure system is bringing a
reinforcing shot of arctic air from central Canada. This high pressure
system, with a central pressure forecast to be above 1050 mb, will spread
cold and dense arctic air down across the Plains, and eastward through the
East Coast during the next few days, sending actual temperatures down to
around zero degrees as far south as the northern border of Oklahoma on New
Year's Day, and into the -30s near the Canadian border on Sunday and New
Year's Day. In fact, daily record low temperatures are possible in the
Midwest and parts of the East Coast on New Year's Day. Meanwhile, a
clipper low pressure system developing on the leading edge of the arctic
air will bring a period of light snow today from the Ohio Valley across
the Appalachians, and into the northern Mid-Atlantic before reaching
southern New England this afternoon and evening. Across the Great Lakes,
westerly flow on the backside of this system will allow for moderate to
heavy lake-effect snows to continue downwind of the lakes with localized
totals of 6 to 12+ inches possible.
A developing wave of low pressure in the western Gulf of Mexico will bring
light rain across eastern Texas today, spreading eastward into the central
Gulf states on Sunday, and into Florida by New Year's Day. Some mixed
precipitation or freezing rain will also be possible on the northern edge
of the moisture shield from northern Texas to central Mississippi and
Alabama, as temperatures are forecast to drop toward the freezing mark
near the central Gulf coast on New Year's Day.
Out west, heavy snowfall will continue for a while early today across the
northern Intermountain West into the northern High Plains as Pacific
moisture aloft overruns the cold and dense arctic air at the surface. The
snow is expected to taper off tonight as the strong arctic high from
Canada settles into the region while coastal rain in the Pacific Northwest
ends. Elsewhere, much of the rest of the western U.S. should remain dry
with milder than normal temperatures as we head into the new year.
Kong
Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php
73 de Scott KF5JRV
Pmail: KF5JRV@KF5JRV.#NWAR.AR.USA.NA email: KF5JRV@ICLOUD.COM
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