Mesoscale Discussion 1194
NWS Storm Prediction Center Norman OK
0923 PM CDT Sat Jul 11 2020
Areas affected...Northern/Central Oklahoma...Northwest Arkansas
Concerning...Severe Thunderstorm Watch 358...360...
Valid 120223Z - 120430Z
The severe weather threat for Severe Thunderstorm Watch 358, 360
continues.
SUMMARY...Severe thunderstorms will spread southeast across northern
Oklahoma and northwest Arkansas this evening. Hail and wind are
expected with this activity.
DISCUSSION...Convection has expanded in areal coverage along a
corridor from the eastern OK Panhandle into extreme northwest AR
over the last few hours. This activity has evolved within an area of
extreme instability along the southwestern flank of a mid-level
short-wave trough that is digging across eastern KS/MO. In the wake
of the short wave, surface boundary has advanced to near the KS/OK
border, and is moving south at 20kt. Within the hour, this boundary
should interact with the extensive convection across the northern
portions of OK which may encourage this activity to continue to grow
upscale and begin to sag south. 00z sounding from OUN was very
unstable with ample deep-layer northwesterly flow to support
organized southeast movement. Wind and hail remain likely with these
storms.
..Darrow.. 07/12/2020
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...TSA...OUN...AMA...
LAT...LON 36900007 36759681 36609594 35919438 35219472 35559827
36089983 36900007
Read morefrom SPC Forecast Products http://www.spc.noaa.gov/products/md/md1194.html
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