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ACUS11 KWNS 310608
SWOMCD
SPC MCD 310607
OKZ000-310700-

Mesoscale Discussion 0582
NWS Storm Prediction Center Norman OK
0107 AM CDT Thu May 31 2018

Areas affected...north-central OK

Concerning...Severe Thunderstorm Watch 135...

Valid 310607Z - 310700Z

The severe weather threat for Severe Thunderstorm Watch 135
continues.

SUMMARY...Expecting a concentrated corridor of severe gusts (60-75
mph) near US 412 between 1am-2am CDT.

DISCUSSION...Radar mosaic shows a mature/severe squall line moving
east at 45 kt across north-central OK. The 04Z OUN RAOB showed a
very steep 700-500 mb lapse rate (8.6 degree C/km) and the KTLX VAD
has shown a strengthening in the 0.5-1.0 km south-southwesterly flow
from 35 to 45 kt. The Breckenridge, OK mesonet observed a 67 mph
gust at 1240am CDT and other sub-severe gusts have been recorded to
the north and south of the apex of the smaller-scale bow that moved
over Breckenridge.

The expectation is the strongest gusts will concentrate near the US
412 corridor over the next hour as the bow apex continues to surge
eastward across this area.

..Smith.. 05/31/2018

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

ATTN...WFO...TSA...OUN...

LAT...LON 36649743 36609644 36479625 36259630 36109651 36129739
36649743



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