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Mesoscale Discussion 651 |
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MESOSCALE DISCUSSION 0651
NWS STORM PREDICTION CENTER NORMAN OK
0216 AM CDT THU MAY 22 2014
AREAS AFFECTED...N CNTRL AND NERN KS...ADJACENT SRN NEBRASKA/NWRN MO
CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE
VALID 220716Z - 220915Z
PROBABILITY OF WATCH ISSUANCE...40 PERCENT
SUMMARY...CONVECTION SPREADING ACROSS NORTH CENTRAL INTO NORTHEAST
KANSAS AND ADJACENT PORTIONS OF SOUTHERN NEBRASKA/NORTHWEST MISSOURI
MAY BE ACCOMPANIED BY A CONTINUING RISK FOR MARGINALLY SEVERE HAIL.
IT IS NOT CERTAIN THAT A WATCH WILL BE NEEDED...BUT AN INCREASING
RISK FOR STRONG SURFACE GUSTS MAY NOT BE OUT OF THE QUESTION.
DISCUSSION...THOUGH FLUCTUATING IN INTENSITY...CONVECTION WITH A
PERSISTENT LINEAR STRUCTURE IN RADAR REFLECTIVITIES CONTINUES TO
GRADUALLY PROGRESS AROUND THE CREST OF LARGER SCALE MID/UPPER
RIDGING ACROSS THE CENTRAL PLAINS. TRAILED BY ADDITIONAL CONVECTIVE
DEVELOPMENT DRIVEN BY LOW-LEVEL WARM ADVECTION...THE BULK OF THE
ACTIVITY APPEARS LIKELY TO CONTINUE GRADUALLY TURNING TO THE
EAST...ALONG A SURFACE FRONTAL ZONE ACROSS NORTH CENTRAL INTO
NORTHEAST KANSAS...NORTH OF THE INTERSTATE 70 CORRIDOR...DURING THE
NEXT FEW HOURS. WHILE STORMS ARE EMBEDDED WITHIN RATHER MODEST /20+
KT/ DEEP LAYER MEAN FLOW...VERTICAL SHEAR APPEARS AT LEAST
MARGINALLY SUFFICIENT FOR ORGANIZED CONVECTION. AND THE INFLOW OF
MOIST AIR CHARACTERIZED BY SIZABLE CAPE ON THE ORDER OF 2000 J/KG
MAY SUPPORT FURTHER INTENSIFICATION. IT MAY NOT BE OUT OF THE
QUESTION THAT THIS COULD BE ACCOMPANIED BY THE EVOLUTION OF A
MID-LEVEL CYCLONIC CIRCULATION WITH ASSOCIATED
DEVELOPING/STRENGTHENING REAR INFLOW JET...WITH POTENTIAL FOR STRONG
SURFACE GUSTS APPROACHING OR EXCEEDING SEVERE LIMITS.
OTHERWISE...HAIL OCCASIONALLY APPROACHING OR EXCEEDING SEVERE LIMITS
MAY REMAIN A THREAT WITH STRONGER CELLS THROUGH DAYBREAK.
..KERR/CARBIN.. 05/22/2014
ATTN...WFO...EAX...OAX...TOP...ICT...GID...DDC...GLD...
LAT...LON 39250021 39909932 40189797 40399654 40229525 39609441
39059522 39009663 38789797 38709906 38870005 39250021
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