Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
340 AM EDT Fri Sep 06 2024

Valid 12Z Fri Sep 06 2024 - 12Z Sun Sep 08 2024

...Dangerous heat continues to impact large sections of the West into this
weekend...

...Heavy rain and instances of flash flooding are likely throughout the
central Gulf Coast and Southeast over the next few days...

...Showers and isolated severe thunderstorms possible from the Ohio Valley
to the Lower Great Lakes today...

An upper level high pressure system is expected to continue aiding well
above average and potentially dangerous temperatures throughout the West
into the first full weekend of September. Highs today are forecast to soar
into the triple digits for much of the Southwest and interior California,
with 110s in the typically hottest locations of the Desert Southwest.
Meanwhile, daily high temperature records are possible in the Northwest
where mid-to-upper 90s are in the forecast. A minimal relaxing of the
extreme heat should be felt throughout much of the West and Southwest on
Saturday, but with temperatures remaining above average. The core of the
anomalous heat will shift to the northern Great Basin and northern Rockies
as parts of eastern Oregon and Washington experience another day with
highs well into the 90s. Poor air quality will also remain an issue
throughout parts of the northern Great Basin as wildfire smoke continues
to plague the region. Residents and visors are advised to follow proper
heat safety, which includes checking on vulnerable individuals.

Not much heavy precipitation to speak of throughout the Nation over the
next few days besides along the Gulf Coast and parts of the Southeast. A
lingering stationary front and a couple waves of low pressure will provide
a focus for tropical downpours over already saturated soils. The greatest
threat for heavy rainfall turning into flash flooding impacts are forecast
across southeast Louisiana today, where a Moderate Risk (level 3/4) of
Excessive Rainfall has been issued. Several inches of rain occurring
within a very short period of time could lead to numerous flash floods
here. A scattered flash flood threat also extends eastward along and just
north of the stationary front into northern Florida and southern Georgia.
This frontal boundary is expected to gradually sink southward by Saturday
as an area of low pressure exits off the Southeast coastline, with a
persisting isolated flash flood potential extending from the central Gulf
Coast and northern Florida to the coastal Carolinas. Remember, most flood
fatalities occur within vehicles... turn around, don't drown.

Elsewhere, a cold front sweeping across the Ohio Valley and Lower Great
Lakes will usher in below average temperatures throughout the Great Lakes,
Midwest, before reaching the East Coast by this weekend, while also
producing areas of showers and thunderstorms. A few storms could produce
locally gusty winds and hail today in the Ohio Valley and nearby Lake Erie
region. Scattered showers are expected to progress eastward along the cold
front on Saturday and dampen weekend plans throughout the Interior
Northeast and sections of New England by Saturday evening.

Snell


Graphics available at
https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php