|Mesoscale Discussion 1291|
< Previous MD Next MD >
Mesoscale Discussion 1291
NWS Storm Prediction Center Norman OK
1010 PM CDT Tue Jul 11 2017
Areas affected...eastern South Dakota
Concerning...Severe Thunderstorm Watch 409...
Valid 120310Z - 120415Z
The severe weather threat for Severe Thunderstorm Watch 409
SUMMARY...Threat for isolated large hail and damaging wind will
persist through 04-05Z over eastern South Dakota followed by a
general decrease in overall threat. The remaining portion of severe
thunderstorm watch 409 is scheduled to expire at 04Z, but can be
locally extended in time for an hour or so if needed.
DISCUSSION...Thunderstorms that developed earlier along dryline
persist over eastern SD. Some supercell structures remain with a
threat for large hail. However, activity is primarily diurnally
driven, and as the boundary layer cools with surface temperatures
falling into the 70s, convective inhibition should increase
significantly resulting in a general decrease in storm coverage and
...Please see www.spc.noaa.gov for graphic product...
LAT...LON 43669655 43709784 44649726 45109674 44849631 43669655
Top/All Mesoscale Discussions/Forecast Products/Home