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| Mesoscale Discussion 1361 | |
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Mesoscale Discussion 1361 NWS Storm Prediction Center Norman OK 0358 PM CDT Fri Jun 21 2024 Areas affected...Central Montana Concerning...Severe Thunderstorm Watch 442... Valid 212058Z - 212230Z The severe weather threat for Severe Thunderstorm Watch 442 continues. SUMMARY...The severe thunderstorm threat continues for WW 442. The threat for damaging winds and hail is greatest in Central MT where two isolated supercells have developed and begun tracking east-southeast. Local WW extension may be needed further N into Phillips County due to a southeastward moving supercell in Blaine County. DISCUSSION...Thunderstorm coverage has increased this afternoon over the northern Rockies in W MT, with clusters of cells beginning to move off of the higher terrain into the better buoyancy and shear. These cells are capable of producing 1+ inch hail and damaging winds. In Central MT, two isolated supercells have developed and begun moving east-southeast. These storms are in an environment of 1000-1500 J/kg MLCAPE and 45-50 kts of deep layer shear, supporting a continued damaging wind and large hail threat. Further east in Blaine County, near the Canadian border, a storm has developed that may track outside of the watch area, warranting local WW extension. ..Halbert/Weinman.. 06/21/2024 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...BYZ...GGW...TFX... LAT...LON 47721223 47991270 48401317 48731307 48871264 48831217 48871114 48881046 48890977 48880900 48880860 48810822 48660797 48510776 48320765 47980753 47570733 47310725 47000719 46680716 46410744 46250788 46210863 46210888 46180898 46180954 46241042 46361076 46631113 46901149 47151176 47451185 47721223 |
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