SPC MD 1526

MD 1526 CONCERNING SEVERE POTENTIAL...WATCH UNLIKELY FOR WESTERN ARIZONA INTO THE COLORADO RIVER VALLEY IN PARTS OF SOUTHEAST CALIFORNIA AND EXTREME SOUTHERN NEVADA

Mesoscale Discussion 1526
NWS Storm Prediction Center Norman OK
0637 PM CDT Tue Aug 18 2020

Areas affected...Western Arizona into the Colorado River Valley in
parts of southeast California and extreme southern Nevada

Concerning...Severe potential...Watch unlikely 

Valid 182337Z - 190130Z

Probability of Watch Issuance...20 percent

SUMMARY...A cluster of storms will pose a severe-wind threat as it
moves southwestward toward the Colorado River Valley.

DISCUSSION...Numerous storms have developed over the higher terrain
northwest of Prescott. These storms have already started to congeal
into a cluster within the past 30 minutes. These storms should
maintain themselves as they move toward a very hot airmass with
temperatures around 115F yielding MLCAPE around 500 to 1000 J/kg. As
these storms congeal and move off the higher terrain toward the
Colorado River Valley, evaporative cooling is expected to support
strong outflow winds with the potential for some severe wind gusts
and likely blowing dust. The severe winds are most likely along the
Colorado River Valley from Laughlin, NV to Parker, AZ. While a few
severe wind gusts are possible, no watch is anticipated given the
relatively small area which will be affected.

..Bentley/Edwards.. 08/18/2020

...Please see www.spc.noaa.gov for graphic product...

ATTN...WFO...FGZ...PSR...VEF...

LAT...LON   34191367 34031432 34181500 34871529 35251497 35471419
            35041321 34771298 34301335 34191367 

Read more

from SPC Forecast Products http://www.spc.noaa.gov/products/md/md1526.html