823
FXUS01 KWBC 300753
PMDSPD

Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
352 AM EDT Wed Jul 30 2025

Valid 12Z Wed Jul 30 2025 - 12Z Fri Aug 01 2025

...Tsunami warnings and advisories are in effect for the West
Coast...

...Heatwave peaks in the East today; relief begins later this
week...

...Severe weather and excessive rainfall potential across Central
U.S. today followed by East Coast Thursday...

...Fire weather impacts for portions of the Great Basin and
Pacific Northwest today...


An earthquake, which occurred off the coast of Kamchatka, Russia
Tuesday night, triggered tsunami advisories to be issued broadly
for the West Coast of the CONUS. Tsunami warnings are in effect
for the coastal areas of California from Cape Mendocino to the
Oregon/California border. Strong currents and dangerous waves are
expected. If you are in this coastal area, move inland to higher
ground.

A ridge in the Southeast will continue to support a prolonged and
expansive heatwave in the region through today. Widespread Major
HeatRisk from the Middle Mississippi Valley to the Northeast,
southward to Florida, affecting over 100 million people today.
High temperatures in the 90s to near 100 degrees with little to no
overnight relief will affect those without access to adequate
cooling or hydration. This level of heat is likely to break some
daily temperature records, particularly today across the
Mid-Atlantic. Numerous warm minimum temperature records are
expected through the week. Cooler temperatures and lower humidity
will bring much needed relief from the extreme heat to much of the
Central and Eastern U.S. by later this week as a cold front moves
southward. The extreme heat will persist the longest, however,
across the central Florida peninsula into this weekend.

Shortwave energy interacting with a surface front, modest
instability and anomalous moisture will produce thunderstorm
activity across the Plains today. A cold front diving south
through the Central/High Plains will provide the focus for
discrete storms capable of producing efficient rain rates. Thus, a
slight risk of excessive rainfall is in effect for much of the
High Plains for this afternoon/evening. A complex of storms
emanating in the Northern Plains Tuesday night will propagate
across the Northern/Central Plains, the Middle Mississippi Valley
and into the Midwest today, producing storms (some severe) and
instances of flash flooding. Another slight risk of excessive
rainfall is in effect for parts of eastern Kansas, Missouri,
Illinois, southern Wisconsin/Michigan and northern Indiana. The
threat for severe weather remains marginal across those
aforementioned areas today.

The eastern section of the cold front will move slowly over the
Northeast/Mid-Atlantic Coast on Thursday leading to potential
training of storms along the DC-PHI-NYC corridor. A slight risk is
in effect from southeast Virginia to southern New England, with an
embedded higher end slight (at least 25% chance) of excessive
rainfall for that DC to NYC urban corridor. Elsewhere, scattered
thunderstorm development in the Pacific Northwest and dry and
breezy conditions across portions of the Great Basin will support
a critical fire risk in those areas today.


Kebede

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