SPC MD 1115

MD 1115 CONCERNING SEVERE THUNDERSTORM WATCH 332... FOR NORTHWEST AND CENTRAL SD

Mesoscale Discussion 1115
NWS Storm Prediction Center Norman OK
1115 PM CDT Sun Jul 05 2020

Areas affected...northwest and central SD

Concerning...Severe Thunderstorm Watch 332...

Valid 060415Z - 060515Z

The severe weather threat for Severe Thunderstorm Watch 332
continues.

SUMMARY...Strong to localized severe gusts (50-65 mph) are possible
over the next hour or two across northwest and central parts of SD.

DISCUSSION...A squall line with a history of severe gusts from
southwestern SD the past few hours continues to move northeast
across parts of northwest SD arcing to the southeast over
south-central SD.  KPHP recently observed a gust of 28 kt at 0345z
but decaying thunderstorms were in the vicinity.  KRCA observed a
53-kt gust in the past hour with vigorous thunderstorms and a
water-laden portion of the convective line.  Surface observations in
the areas downstream of the squall line have cooled into the 70s deg
F.  It appears the remaining severe risk may concentrate and become
increasingly localized in the vicinity of the deeper convective
cores as the boundary layer continues to become less unstable.  As
such, strong to locally severe gusts are possible over the next 1-2
hours but the coverage and intensity of the gusts will likely lessen
during this time.  An additional severe thunderstorm watch will
likely not be needed downstream of severe thunderstorm watch 332.

..Smith.. 07/06/2020

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

ATTN...WFO...ABR...LBF...UNR...

LAT...LON   45260370 45640263 45130110 43859994 43039991 42960084
            43940096 44500172 44730326 45260370 

Read more

from SPC Forecast Products http://www.spc.noaa.gov/products/md/md1115.html