Mesoscale Discussion 1676 NWS Storm Prediction Center Norman OK 1126 PM CDT Sat Sep 05 2020 Areas affected...Southern MN...Northern/Eastern IA Concerning...Severe Thunderstorm Watch 486... Valid 060426Z - 060600Z The severe weather threat for Severe Thunderstorm Watch 486 continues. SUMMARY...Hail threat continues with storms tonight. DISCUSSION...Large-scale forcing for ascent appears to be spreading rapidly southeast across the upper Red River Valley region ahead of a digging short-wave trough. Numerous elevated thunderstorms have developed in response to a strengthening LLJ which should continue to feed convection as it propagates southeast into northern IA over the next few hours. Latest radar data suggests several severe hail cores have developed within maturing convection across northern portions of ww486, and this should continue well into the pre dawn hours with some clustering likely. Severe threat remains primarily large hail. ..Darrow.. 09/06/2020 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...DVN...ARX...MPX...DMX...FSD... LAT...LON 43529610 45559607 42999134 40979137 43529610Read more
from SPC Forecast Products http://www.spc.noaa.gov/products/md/md1676.html
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