DAY 1 CONVECTIVE OUTLOOK NWS STORM PREDICTION CENTER NORMAN OK 0756 PM CDT THU SEP 08 2016 VALID 090100Z - 091200Z ...THERE IS A MRGL RISK OF SVR TSTMS FOR NRN OK...SRN KS...SWRN MO...NWRN AR... ...THERE IS A MRGL RISK OF SVR TSTMS PARTS OF NEB/SD INTO THE UPPER MS VALLEY... ...SUMMARY... ISOLATED STRONG TO SEVERE THUNDERSTORMS WITH DAMAGING WIND GUSTS WILL BE POSSIBLE FROM THE KANSAS-OKLAHOMA BORDER REGION TO THE OZARK PLATEAU THIS EVENING. ISOLATED SEVERE HAIL MAY ALSO OCCUR TONIGHT ACROSS PARTS OF THE CENTRAL PLAINS AND THE MID MISSOURI VALLEY. ...NRN OK/SRN KS INTO THE OZARK PLATEAU... SCATTERED TSTMS HAVE DEVELOPED ALONG/N OF A WEAK BOUNDARY SITUATED NEAR THE OK/KS BORDER AND INTO NERN OK. A STRENGTHENING LLJ SHOULD FOSTER CONTINUED TSTM DEVELOPMENT ACROSS THIS AREA...WITH A FEW ESEWD PROPAGATING CLUSTERS EVOLVING AND MOVING ROUGHLY PARALLEL TO THE BOUNDARY. ISOLATED STRONG TO SVR WIND GUSTS AND MARGINALLY SVR HAIL WILL BE POSSIBLE...BUT OVERALL TSTM INTENSITY SHOULD BE LIMITED BY POOR MIDLEVEL LAPSE RATE AND MARGINAL SHEAR...WITH HEAVY RAINFALL BEING THE DOMINANT THREAT. ...CNTRL PLAINS EWD INTO THE UPPER MS VALLEY... A COLD FRONT WILL SURGE SSEWD TONIGHT ACROSS THE DAKOTAS INTO NEB...AND FORCING FOR ASCENT ACCOMPANYING WEAK MIDLEVEL HEIGHT FALLS SHOULD FOSTER THE DEVELOPMENT OF ISOLATED TSTMS. THIS ACTIVITY SHOULD REMAIN PRIMARILY ELEVATED GIVEN NOCTURNAL BOUNDARY-LAYER COOLING AND INCREASING CIN FOR SFC-BASED PARCELS. STEEPENING OF MIDLEVEL LAPSE RATES FROM THE W /SEE ABR 09/00Z SOUNDING/ COMBINED WITH MODERATE TO STRONG EFFECTIVE-LAYER SHEAR WILL SUPPORT ISOLATED INSTANCES OF LARGE HAIL AS FAR E AS THE UPPER MS VALLEY BY 09/12Z. ..ROGERS.. 09/09/2016Read more
from SPC Forecast Products http://ift.tt/rxAC6Z
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