FXUS01 KWBC 041925

PMDSPD



Short Range Forecast Discussion

NWS Weather Prediction Center College Park MD

324 PM EDT Tue Aug 04 2026



Valid 00Z Wed Aug 05 2026 - 00Z Fri Aug 07 2026



...Strong heatwave continues for the Southwest...



...Locally heavy rain possible in the Corn Belt tonight into

Wednesday...



...Poor air quality for the Pacific Northwest and Great Basin...



A strong upper high ("heat dome") over the Southwest will remain

in place for at least the next couple of days, favoring a

continuation of hot temperatures for much of Nevada, Arizona,

interior California, and into Oregon on Wednesday. Some daily

record high temperatures are possible. The above normal

temperatures will spread through the Rockies tomorrow and into the

High Plains Thursday.



Over the Upper Midwest/Corn Belt/mid-Mississippi Valley, a wavy

frontal boundary will act as a focus for showers and storms this

evening into Wednesday. Some of the storms could produce locally

heavy rain that may lead to instances of flash flooding. A Slight

Risk area is noted for southeastern Iowa, northern/central

Illinois, and northern Missouri tomorrow. Scattered showers and

storms will also be possible along the front northeastward through

the Great Lakes. Temperatures will be near to below normal over

the central Plains to parts of the Midwest due to an abundance of

cloud cover.



Over the East, a Bermuda high in the western Atlantic will

maintain a southerly/southwesterly flow into the area, maintaining

higher levels of humidity for the Southeast that will push

northward through the Mid-Atlantic to the Northeast on Wednesday

and Thursday. Dew points into the 60s and 70s will also come with

the chance for some scattered showers and storms. Temperatures

will be above normal with the southerly flow -- well into the 80s

and 90s.



Finally, in the Northwest, ongoing fires will lead to persistent

smoke in the region, from Washington/Oregon eastward and also over

the Great Basin with separate fires. Air quality alerts are in

effect for much of the region. Some members of the public may

experience health effects. Members of sensitive groups may

experience more serious health effects. This includes children,

the elderly, and persons with respiratory problems. Temperatures

will trend warmer over the next couple of days, leading to

Moderate HeatRisk levels (3 out of 5).



Fracasso



Graphics available at

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









$$