Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
417 PM EDT Wed Jul 01 2020
Valid 00Z Thu Jul 02 2020 - 00Z Sat Jul 04 2020
...Flash flooding and thunderstorms possible in the Tennessee Valley
...Fire threat ongoing across the Great Basin...
...Hot temperatures likely for the Plains and Upper Midwest into the
Broadly speaking, a pair of upper-level lows on the west and east coasts
will move off to the north and east, respectively, as an upper-level ridge
expands over the central U.S over the next couple of days.. Scattered
thunderstorms are expected to wind down across the Northeast, but continue
for the Southeast tonight. Meanwhile, a Slight Risk of Excessive Rainfall
is in effect for parts of the Tennessee Valley as the threat for flash
flooding will linger along a stationary boundary. The chance for
thunderstorms continues across the Southeast and Tennessee Valley through
the next couple of days along that same persistent stationary boundary.
An approaching cold front, dry conditions, and winds near 20 mph lead to
the Storm Prediction Center issuing an elevated area of fire weather risk
for the Great Basin and Rockies with a hatched area of critical risk for
eastern Nevada into western Utah for tonight. The elevated risk area will
continue into tomorrow as similar, but slightly weaker conditions are
The upper-level ridge currently stationed over the Southern Plains will
expand northward tomorrow, which will lead to hot temperatures across the
Great Plains and the Upper Midwest, in particular, through Friday.
Temperatures over the Upper Great Lakes are likely to be 15-20 degrees
above average through Friday with potentially lower temperatures across
the northern portion of the Upper Peninsula due to a light sea breeze
effect off of Lake Superior.
While the highest concentration of Saharan dust has dissipated, the next
round impacting the western and central Gulf Coast states today should
persist into late week. The primary impacts of the Saharan dust are hazy
skies during the day, locally reduced visibility, degraded air quality,
and the potential for vividly colorful sunrises and sunsets.
Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php