SPC MD 2398
MD 2398 CONCERNING SEVERE POTENTIAL...WATCH UNLIKELY FOR EASTERN NEVADA...SOUTHWEST UTAH AND EXTREME NORTHWEST ARIZONA

Mesoscale Discussion 2398
NWS Storm Prediction Center Norman OK
1247 PM CDT Thu Oct 22 2026

Areas affected...Eastern Nevada...southwest Utah and extreme
northwest Arizona

Concerning...Severe potential...Watch unlikely 

Valid 221747Z - 221915Z

Probability of Watch Issuance...20 percent

SUMMARY...Occasional strong-severe gusts, isolated large hail and an
isolated tornado will all be possible.  However, the threat is
expected to remain relatively sparse and on the lower margins for a
broad area, so a watch is not currently anticipated.

DISCUSSION...A midlevel trough over southern/central CA is beginning
to eject east-northeastward toward the southern Great Basin, with
downstream forcing for ascent likewise overspreading eastern NV,
western UT and extreme northwest AZ.  Surface heating in cloud
breaks is contributing to destabilization and storm coverage is
expected to increase in broken bands through the afternoon.  Long,
straight hodographs will favor a mix of splitting cells and line
segments capable of producing isolated large hail and strong-severe
gusts.  The magnitude of the threat will be limited somewhat by
relatively shallow buoyancy profiles.  The environment is a bit more
favorable for supercells across southwest UT and vicinity where
buoyancy is larger with mid-upper 50s dewpoints and the storm mode
will be semi-discrete.

..Thompson/Guyer.. 10/22/2026

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

ATTN...WFO...FGZ...SLC...VEF...LKN...

LAT...LON   38521352 37771251 37091245 36451284 36021428 36161494
            36631536 37591530 38521523 39501533 40961565 41981562
            41981498 39861446 38521352 

MOST PROBABLE PEAK TORNADO INTENSITY...UP TO 90 MPH
MOST PROBABLE PEAK WIND GUST...55-70 MPH
MOST PROBABLE PEAK HAIL SIZE...1.00-1.75 IN

Read more
https://www.spc.noaa.gov/products/md/md2398.html