The Nation’s Weather

…Heavy rain and flash flooding quite possible over parts of the southern
Plains into the Ozarks on Sunday…

…Severe thunderstorms possible on Sunday from Oklahoma and Texas
eastward into the Southeast…

A frontal boundary extends from the Rockies through the southern Plains
and eastward into the Southeast. This will act as a focus for
rain/thunderstorms over the next couple of days as it separates a
warm/humid air mass closer to the Gulf Coast from a more temperate air
mass over the Mid-South. Rounds of rainfall over already soggy areas may
lead to flooded roads and/or rivers — Turn around. Don’t drown! There is
a Moderate Risk (level 3 of 4) for excessive rainfall and flash flooding
over northeastern Oklahoma into southwestern Missouri and northwestern
Arkansas (Ozarks region) on Sunday. In addition, severe weather is
possible along and south of the frontal boundary, especially over Oklahoma
into north Texas. The Storm Prediction Center has issued an Enhanced Risk
(level 3 of 5) for severe weather there, with large hail and strong,
damaging winds the main threat. Tornadoes are also possible.

Over the Northeast, a slowly departing system will maintain a cool pattern
over the region for the Holiday weekend, but temperatures will moderate
into Monday. Still, highs will only be in the 50s/60s to the north and
low-mid 70s over most of the Mid-Atlantic (south of I-76). Isolated
afternoon showers Sunday will decrease further on Monday as high pressure
approaches from the Great Lakes.

Over the West, a generally dry and warm Sunday will lead to increasing
clouds, rain showers, and cooler temperatures by Monday west of the
Continental Divide. Temperatures will rise well into the 80s over the
interior West on Sunday but will remain much cooler along the coast. The
approaching cold front will come ashore Sunday evening with some showers
for the lowlands that clear areas west of the Cascades by Monday
afternoon.

Fracasso

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