…Areas of heavy rain and the potential for flash flooding forecast
throughout the south-central U.S. into early this week…
…Well above average, hot late-summer temperatures spread from the
northwestern to north-central U.S. this holiday weekend…
…Critical Fire Weather for parts of the central Great Basin on Monday…
Unsettled weather with daily chances for scattered to numerous
thunderstorms are forecast to impact the southern U.S. through early this
week, with the potential for flash flooding where the heaviest rain
occurs. A cold front sinking southward through Monday and eventually
stalling on Tuesday in the Deep South will be the focus for developing
showers and storms stretching between the southern High Plains and
Southeast. This frontal boundary will interact with anomalous atmospheric
moisture content lingering across the southern Plains and Gulf Coast as
well as upper-level energy ejecting out of northern Mexico. These
ingredients are expected to lead to thunderstorms capable of containing
intense rainfall rates while also exhibiting slow forward speed across
parts of central and northwest Texas on Labor Day, which has prompted a
Slight Risk (level 2/4) of Excessive Rainfall to be issued. Thunderstorms
capable of producing localized flash flooding are also possible through
early this week for the coastal Carolinas, Florida, and over the Gulf
Coast region. Residents and visitors are reminded to remain weather ready
and never drive across flooded roadways.
Another part of the Nation with active and potentially hazardous weather
conditions for the Labor Day holiday will be the Northwest and northern
High Plains as scattered thunderstorms replace late-summer heat over the
region today. Hot temperatures with highs into the upper 90s for much of
the northern Great Basin today is forecast to shift east on Monday and
Tuesday into the northern Plains. Meanwhile, a weather system entering the
Northwest today will spread isolated thunderstorm chances into the Great
Basin and northern Rockies over the next few days. Lightning associated
with storms could spark fires in areas with receptive fuels. Additionally,
gusty winds impacting northeast California, northwest Nevada, and
southeast Oregon on Labor Day has prompted a Critical Fire Weather Risk.
Elsewhere, warm temperatures only slightly above average remain in place
across the Southwest through Tuesday, while cool conditions are expected
for the southern Plains due to ample cloud cover and rain chances. A
strong high pressure system for this time of year is expected to settle
over the Great Lakes on Monday and Northeast on Tuesday, ushering in a
refreshing fall airmass between the Midwest and East Coast. Dry conditions
and high temperatures into the 70s and low 80s will be widespread, with
low temperatures dipping into the crisp 40s and 50s.
Snell
Graphics available at
https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php
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