Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
405 PM EDT Sat Oct 02 2021

Valid 00Z Sun Oct 03 2021 - 00Z Tue Oct 05 2021

...Scattered thunderstorms ahead of a cold front are expected to bring
brief periods of heavy rain across parts of the mid-Mississippi into
tonight...

...Air Quality Alerts over the San Joaquin Valley through Monday...

A frontal boundary extending through the Plains and into the upper Midwest
is forecast to move gradually eastward during the next couple of days. 
Scattered showers and thunderstorms are expected to affect much of the
Mississippi and Ohio Valleys as well as the Great Lakes through the rest
of the weekend.  A weak low pressure wave riding along the front will help
bring a slight risk of excessive rainfall through tonight over the
mid-Mississippi Valley where brief periods of heavy downpours are forecast
to accompany some of the stronger thunderstorms.  The threat of excessive
rainfall should lessen to marginal on Sunday into Monday morning over
parts of the Tennessee Valley as the scattered storms spread into the Deep
South and the Tennessee Valley.  More scattered thunderstorms are also
expected to slowly spread into the Ohio Valley and the Great Lakes closer
to the center of a low pressure system forecast to slowly track
east-southeast across the Great Lakes.

Meanwhile, a steady rain is forecast to develop in central and southern
New England later on Sunday following the passage of a back door cold
front.  The low pressure system over the Great Lakes will slowly approach
New England on Monday, bringing moderate rainfall as well as the chance of
thunderstorms into the northeastern U.S. on Monday.  The nice stretch of
fine autumn weather along the East Coast should extend one more day into
Sunday before the scattered thunderstorms slowly make their way into the
Appalachians Sunday night and into the Mid-Atlantic on Monday.  Meanwhile,
scattered thunderstorms moving across the Deep South should reach the
Southeast on Monday. 

In the western U.S., poor air quality is expected to linger across the San
Joaquin Valley of California where Air Quality Alerts are in effect
through Monday.  Temperature-wise, much of the country, except the
Southwest and along the West Coast, will see above normal temperatures. 
Much above normal temperatures are forecast to reach the northern High
Plains on Monday where high temperatures well into the 80s are expected
ahead of the next upper trough.

Kong


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