Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
310 PM EDT Mon May 29 2023

Valid 00Z Tue May 30 2023 - 00Z Thu Jun 01 2023

...Widespread scattered showers and thunderstorms expected for large
portions of the central U.S. into the Northern Rockies and northern Great
Basin...

...Showery conditions likely across the Southern Mid-Atlantic through
Tuesday and developing across portions of Florida Wednesday...

...Much above average temps expected along the northern tier of the
nation, while cooler than average temps accompany the showers across the
Southeast portion of the nation...

The large scale flow across the Lower 48 remains fairly blocked over the
next few days, characterized by a mean trof across the western half of the
country, another trof from the southern Mid-Atlantic into the Southeast
and a closed upper high from the Great Lakes into the Northeast.

The mean trof pattern across the western U.S. will support widespread
scattered showers over the next two days from northern California through
the northern Great Basin, Northern Rockies and across much of the Plains
states.  Across these regions, isolated heavy rainfall amounts are
possible along with isolated instances of flash flooding.

Across the Southern Mid-Atlantic, a slow moving upper low will inch its
way offshore during Tuesday.  This system will continue to produce
scattered showers across the Southern Mid-Atlantic on Tuesday, but as the
system continues to push offshore, drier conditions expected on Wednesday.
 In the wake of this upper low moving offshore, another upper low is
expected to form across the central Gulf of Mexico.  Shower activity will
become increasingly likely to the east of this developing upper low on
Wednesday, bringing increasing rain chances for central to South Florida.
This new upper low will be slow moving through the remainder of the week
as it moves across the eastern Gulf and Florida, maintaining a wet pattern
for central to South Florida into late this week.

A closed upper high will remain parked across the northeastern portion of
the nation from the Great Lakes into New England. Dry conditions and much
above average temperatures will accompany this upper high with high
temperatures 15 to 20 degrees above average across much of the northern
tier from the Norther Plains, through the Upper Lakes, northern NY State
into Northern New England.  Cooler than average temperatures over the next
few days will be associated with the showery pattern across the
southeastern U.S. and along the West coast into the Desert Southwest.

Oravec


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