ZCZC SPCSWOMCD ALL
ACUS11 KWNS 212011 
SPC MCD 212011 
COZ000-NMZ000-WYZ000-UTZ000-AZZ000-212145-

Mesoscale Discussion 1360
NWS Storm Prediction Center Norman OK
0311 PM CDT Fri Jun 21 2024

Areas affected...the Four Corners Area and eastern UT vicinity

Concerning...Severe Thunderstorm Watch 441...

Valid 212011Z - 212145Z

The severe weather threat for Severe Thunderstorm Watch 441
continues.

SUMMARY...An isolated severe hail and wind threat should continue
for the next several hours as single cells and a few supercells
spread slowly east-northeastward, mainly affecting the eastern Utah
to Four Corners Area.

DISCUSSION...Scattered to numerous thunderstorms are ongoing across
the eastern Great Basin to southern/central Rockies region. The most
intense storm has been a persistent slow-moving supercell along the
AZ/UT border area near Page. Significant severe hail from 2-2.5
inches in diameter and even a brief tornado will be possible as this
storm moves along the Lake Powell to Glen Canyon vicinity over the
next couple hours. A few additional supercells should develop over
eastern UT into the Four Corners vicinity amid MLCAPE of 1000-1500
J/kg and effective bulk shear of 40-50 kts. Convection across
west-central CO in the Grand Junction vicinity may tend to struggle
owing to the limit period of heating between morning convection and
renewed development this afternoon.

..Grams.. 06/21/2024

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

ATTN...WFO...ABQ...RIW...GJT...FGZ...SLC...

LAT...LON   36600889 35540758 35020768 34750859 35421036 36311174
            37571201 39321139 40491080 41080939 41020868 38020872
            36600889 

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