SPC MD 1799

MD 1799 CONCERNING SEVERE THUNDERSTORM WATCH 510… FOR SWRN MO…FAR SRN KS…NRN OK

MESOSCALE DISCUSSION 1799
NWS STORM PREDICTION CENTER NORMAN OK
1253 AM CDT FRI SEP 11 2015

AREAS AFFECTED...SWRN MO...FAR SRN KS...NRN OK

CONCERNING...SEVERE THUNDERSTORM WATCH 510...

VALID 110553Z - 110700Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 510
CONTINUES.

SUMMARY...STRONG WIND GUSTS AND SMALL HAIL SHOULD PERSIST FOR A
COUPLE MORE HOURS S/E OF REMAINING VALID PORTIONS WW 510. GIVEN
OVERALL WEAKENING TRENDS...AN ADDITIONAL SEVERE TSTM WATCH ISSUANCE
IS STILL NOT EXPECTED.

DISCUSSION...EXTENSIVE MCS WITH MCV IN W-CNTRL MO AND TRAILING
SQUALL LINE ACROSS SWRN MO TO N-CNTRL OK IS WITHIN ITS DECAYING
PHASE PER WEAKENING REFLECTIVITY GRADIENTS/VELOCITY SIGNATURES AND
IR CLOUD TOP WARMING. NEVERTHELESS...STRONG WIND GUSTS OF 35-45 KT
HAVE BEEN COMMON IN THE PAST HOUR WITH THE HIGHEST BEING 46 KT
MEASURED AT KCFV AT 0457Z. WITH 00Z WARM SECTOR RAOBS AT SGF/OUN/FWD
SAMPLING MEAN MIXING RATIOS ONLY AROUND 11 G/KG AND MODEST LOW-LEVEL
MASS RESPONSE /25-KT SSWLYS IN KTLX VWP DATA/...THE OVERALL DECAYING
TREND IS EXPECTED TO CONTINUE THIS MORNING.

..GRAMS.. 09/11/2015

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...LSX...SGF...EAX...TSA...ICT...OUN...

LAT...LON   38559344 38699270 38459231 37959224 37179259 36619304
            36479435 36009672 35829785 35929843 36309850 36709765
            37049524 37389388 37809348 38559344 

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from SPC Mesoscale Discussions http://1.usa.gov/1O4VScz