Weather Outlook for the U.S. for Today Through at Least 22 Days and a Six-Day Forecast for the World: posted October 29, 2024
This article focuses on what we are paying attention to in the next 48 to 72 hours. The article also includes weather maps for longer-term U.S. outlooks (up to four weeks) and a six-day World weather outlook which can be very useful for travelers.
First the NWS Short Range Forecast. The afternoon NWS text update can be found here after about 4 p.m. New York time but it is unlikely to have changed very much from the morning update. The images in this article automatically update.
Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
Tue Oct 29 2024
Valid 12Z Tue Oct 29 2024 – 12Z Thu Oct 31 2024…Moderate to heavy snow over parts of the Northern/Central Rockies on
Tuesday……Temperatures will be 20 to 35 degrees above average over parts of the
Central Plains to the Great Lake/Ohio Valley……There is a Slight Risk of severe thunderstorms over parts of the
Middle/Lower Mississippi Valley and Central/Southern Plains on Wednesday…A wave of low pressure along a front over the Great Basin/Central Rockies
will move northeastward to the Upper Mississippi Valley by Thursday. Ahead
of the front, temperatures will be 20 to 35 degrees above average over
parts of the Central Plains to the Great Lake/Ohio Valley. A warm front
extending from the Upper Mississippi Valley to the Ohio Valley moves
northeastward into Eastern Canada by Wednesday. Ahead of the warm front,
showers and thunderstorms will develop over parts of the Great Lakes,
ending by Tuesday afternoon. On Tuesday evening, rain will develop over
parts of the Lower Great Lakes/Northeast and continue into Wednesday
afternoon.On Tuesday, a wave of low pressure will produce moderate to heavy snow
over parts of the Northern/Central Rockies and higher elevations of the
eastern Great Basin. Rain will also develop over parts of the lower
elevations of the Southwest, Great Basin, and Central Rockies.Moreover, weak onshore flow off the Pacific will produce rain over parts
of the Pacific Northwest through late Tuesday evening. Light snow will
continue on Wednesday over parts of the Northern/Central Rockies through
late Wednesday night.Meanwhile, southeasterly flow off the Gulf of Mexico will create scattered
showers and thunderstorms over parts of the Western Gulf Coast on Tuesday
into Wednesday. Similarly, easterly flow off the Atlantic will produce
showers and thunderstorms over parts of Florida through Thursday morning.Further, moist air flowing northward over the Plains will extend into the
Upper Great Lakes on Wednesday, creating showers and thunderstorms over
parts of the Northern Plains and Upper Mississippi Valley. Showers and
strong to severe thunderstorms will develop ahead of the front over parts
of the Middle Mississippi Valley to the Central/Southern Plains.
Therefore, the SPC has issued a Marginal Risk (level 1/5) of severe
thunderstorms over parts of the Middle Mississippi Valley to
Central/Southern Plains through Wednesday morning. The hazards associated
with these thunderstorms are frequent lightning, severe thunderstorm wind
gusts, hail, and a minimal threat of tornadoes.On Wednesday, showers and severe thunderstorms will develop along and
ahead of the front over parts of the Middle/Lower Mississippi Valley and
Central/Southern Plains. Therefore, the SPC has issued a Slight Risk
(level 2/5) of severe thunderstorms over these areas from Wednesday
through Thursday morning. The hazards associated with these thunderstorms
are frequent lightning, severe thunderstorm wind gusts, hail, and a few
tornadoes.Furthermore, moderate to heavy rain will develop along the front parts of
the Mississippi Valley and the Central/Southern Plains. Therefore, the WPC
has issued a Marginal Risk (level 1/4) of excessive rainfall over parts of
the Mississippi Valley and parts of the Central/Southern Plains from
Wednesday through Thursday morning. The associated heavy rain will create
localized areas of flash flooding, affecting areas that experience rapid
runoff with heavy rain.Elsewhere, another front will come onshore over the Pacific Northwest and
California on Wednesday into early Thursday morning. The system will
produce rain and higher-elevation snow over parts of the Northwest into
Northern/Central California.