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KF5JRV > WX 06.04.17 13:24l 63 Lines 3146 Bytes #999 (0) @ USA
BID : 13551_KF5JRV
Read: GUEST
Subj: NWS USA WX Forecast 4/6
Path: IW8PGT<CX2SA<N9PMO<NS2B<KF5JRV
Sent: 170406/1215Z 13551@KF5JRV.#NWAR.AR.USA.NA BPQK6.0.13
Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
316 AM EDT Thu Apr 06 2017
Valid 12Z Thu Apr 06 2017 - 12Z Sat Apr 08 2017
...Severe thunderstorms possible across portions of the Mid-Atlantic...
...Heavy rain possible for portions of the northern Mid-Atlantic and
Northeast...
...Rain and snow expected to spread across much of the western U.S.
through Saturday...
A deepening low pressure system will move northeastward from the Ohio
valley to the lower Great Lakes today and tonight. A cold front ahead of
the system will sweep eastward across the Mid-Atlantic states, bringing
potentially heavy rainfall as well as severe thunderstorms. Please refer
to products issued by the Storm Prediction Center for further details on
the severe weather threat. Farther north, an occluded frontal system along
with a plume of moisture and from farther south will bring widespread rain
and a few thunderstorms to the Northeast. Rain is expected to persist
across much of the Northeast through tonight and into Friday morning as
the low pressure system lingers overhead. Rainfall amounts of 1 to 2
inches are possible across areas from the northern Mid-Atlantic to the
Northeast. These heavy rains could produce result in flooding issues for
some areas. Colder air will wrap around the western side of the low
pressure system Thursday night into Friday, with rain mixing with or
changing to snow across the lower Great Lakes and along the spine of the
Appalachians. This mixture of rain and snow is forecast to gradually taper
off through the day on Friday, but scattered rain or snow showers could
persist into Friday evening across portions of the central/northern
Appalachians. Much cooler temperatures will overspread the eastern third
of the nation in the wake of this system, with high temperatures today and
Friday forecast to be 10 to 15 degrees below average for many areas.
Temperatures will begin to moderate some by Saturday, but will remain
below average for many areas.
A pattern change is in store for the western U.S. over the next couple
days, with a return to wet and stormy conditions expected. A weak frontal
system will bring rain and high elevation snows to areas from northern
California to the Pacific Northwest and the northern Intermountain West
early today. A more substantial system will approach the West Coast late
today, however, bringing a plume of deep Pacific moisture, and spreading
widespread rain and mountain snow across much of the region tonight and
Friday. By Friday night, snow levels will lower across the West as an
upper-level trough amplifies overhead. Rain is expected to change to snow
Friday night across much of the interior West, with snow levels lowering
further in the Cascades, Sierras, and coastal ranges. Heavy snow will be
possible at some of the higher elevations. Also by Friday night into
Saturday, another wave of low pressure is forecast to approach central
California, bringing a renewed round of moisture and precipitation to the
region.
Ryan
Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php
73 Scott KF5JRV
KF5JRV.#NWAR.AR.USA.NA
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