MESO: Mesoscale Discussion 1766

ACUS11 KWNS 242138
SWOMCD
SPC MCD 242138
CAZ000-242245-

MESOSCALE DISCUSSION 1766
NWS STORM PREDICTION CENTER NORMAN OK
0438 PM CDT SAT AUG 24 2013

AREAS AFFECTED...PORTIONS OF SRN CA DESERTS

CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY

VALID 242138Z - 242245Z

PROBABILITY OF WATCH ISSUANCE...5 PERCENT

SUMMARY...THE POSSIBILITY FOR ISOLD WET MICROBURSTS WILL CONTINUE
FOR THE NEXT FEW HOURS OVER THE INTERIOR SRN CA DESERTS.

DISCUSSION...RADAR MOSAIC/WDSS-II 9 KM CAPPI IMAGERY SHOW SEVERAL
LARGE TSTM CORES OVER IMPERIAL/RIVERSIDE/SAN BERNARDINO COUNTIES.
THE STORMS HAVE DEVELOPED IN A MOIST/UNSTABLE AIRMASS...AND WHEN
MODIFYING THE LATEST RAP FORECAST SOUNDINGS FOR 21 UTC SURFACE
TEMP/DEWPOINTS...UPWARDS OF 2000-4000 J/KG SBCAPE IS IMPLIED. WATER
LOADING AND STEEP LOW LEVEL LAPSE RATES WILL SUPPORT AN ISOLD WET
MICROBURST THREAT WITH THE MORE INTENSE STORMS. GIVEN SLOW STORM
MOTIONS...AN ADDITIONAL HAZARD WITH THESE STORMS WILL BE LOCALIZED
HEAVY RAINFALL...FOR FURTHER DETAILS REFERENCE MPD #222 /IN EFFECT
UNTIL 0014 UTC/.

..SMITH/WEISS.. 08/24/2013

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...PSR...VEF...SGX...

LAT...LON 32591602 34191640 34921608 34631509 33831483 32711499
32591602

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