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KF5JRV > WX 27.04.21 12:35l 68 Lines 3132 Bytes #999 (0) @ USBBS
BID : 14206_KF5JRV
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Subj: NWS USA WX Forecast - Apr 27
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KF5JRV
Sent: 210427/1053Z 14206@KF5JRV.#NWAR.AR.USA.NA BPQ6.0.20
Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
406 AM EDT Tue Apr 27 2021
Valid 12Z Tue Apr 27 2021 - 12Z Thu Apr 29 2021
...There is a Slight risk of Severe Thunderstorms over parts of the
Southern/Central Plains through Wednesday morning...
...Fire danger narrows to the Southern /Central High Plains Wednesday...
...Temperatures will be 10 to 15 degrees above average from the Middle
Mississippi Valley eastward to the Mid-Atlantic, while Temperatures will
be 10 to 20 degrees below average over the Southwest...
A wave of low pressure over the Central Plains will move eastward to the
Ohio Valley by Thursday as the trailing front lingers over the Southern
Plains. Showers and thunderstorms will develop along and ahead of a
dryline over the Central/Southern Plains on Tuesday evening into
Wednesday. The SPC has issued a Slight risk of severe thunderstorms over
parts of the Southern/Central Plains through Wednesday morning. The
hazards associated with these thunderstorms are frequent lightning, severe
thunderstorm wind gusts, hail, and a few tornadoes. There is a 10% or
greater probability of two-inch or larger diameter hail with the severe
thunderstorms. The heavy rain associated with the thunderstorms may
produce isolated areas of flash flooding. Furthermore, showers and
thunderstorms will develop along and north of the boundary from the
Central/Northern Plains into the Upper Great Lakes on Tuesday into Tuesday
evening.
Overnight Tuesday, the showers and thunderstorms will expand into parts of
the Lower Great Lakes and into parts of the Northeast by Wednesday
morning. Additional severe weather may develop over parts of the Southern
Plains on Wednesday. The showers and thunderstorms will slowly move into
parts of the Middle/Lower Mississippi Valley by Wednesday morning while
lingering over parts of the Southern Plains.
Meanwhile, an upper-level low over the Great Basin will move eastward to
Texas while weakening by Thursday. The system will produce rain and snow
over parts of the Pacific Northwest to the Northern Rockies southward to
the Great Basin, Southern California, and the Southwest on Tuesday. The
rain and snow will end over the Northwest by Tuesday afternoon, while the
rain and snow will move into parts of the Central Rockies. The rain and
higher elevation snow will move into parts of the Southern Rockies by
Wednesday morning. The rain and snow will end over the Central/Southern
Rockies by Thursday morning.
While the weather will relieve the fire weather threat over the Southwest
and Southern Rockies, a Critical and Elevated fire weather threat will
continue over the Southern/Central High Plains into Wednesday morning.
Elsewhere, under the upper-level low temperatures will be 10 to 20 degrees
below average over the Southwest. The temperatures will be 10 to 15
degrees above average from the Middle Mississippi Valley eastward to the
Mid-Atlantic on Tuesday.
Ziegenfelder
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@gmail.com
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