Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
1252 AM EDT Sat Jul 22 2023

Valid 12Z Sat Jul 22 2023 - 12Z Mon Jul 24 2023

...Excessive Heat Warnings and Advisories from parts of California, the
Northern Intermountain Region, Southwest, and the Great Basin; a second
area from the Southeast to Texas...

...Monsoonal rain to impact the Four Corners region...

A dangerous, long-lived, and record-breaking heat wave will continue over
the Southwest this weekend, particularly in the low desert areas, with
triple digit high temperatures also extending northward into the Central
Great Basin. Temperatures next week are forecast to remain hot, but return
closer to average. Oppressive heat and humidity are expected to create
widespread 105-115 degree heat indices across the Mid-South, Southeast,
and Gulf Coast through early this weekend. Relief arrives by Sunday for
most areas as a cold front approaches the northern Gulf Coast. Take the
heat seriously and avoid extended time outdoors. Temperatures and heat
indices will reach levels that would pose a health risk to anyone without
effective cooling and/or adequate hydration. Nighttime temperatures will
provide very little relief. Heat is the leading weather-related killer in
the U.S. Excessive Heat Warnings and heat advisories are currently in
effect across the southern tier of the U.S..

This weekend, monsoonal moisture will bring heavy rain concerns to Arizona
and New Mexico where a marginal risk of excessive rainfall leading to
flash flooding is in effect. A quasi-stationary front will be the focus
for thunderstorms and potentially heavy rainfall this weekend. Some areas
along the central Gulf Coast may accumulate 1-2 inches of rain per hour.
This should only be enough to cause isolated instances of flash flooding.
Elsewhere, the low pressure system in the Northeast will generate some
storms in the interior Northeast and New England today before the system
and storms move off into the Canadian Maritime on Sunday. A cold front
sweeping down through the Upper Midwest will bring showers and
thunderstorms to the greater Midwest this weekend.


Kebede


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