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Mesoscale Discussion 883 |
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MESOSCALE DISCUSSION 0883
NWS STORM PREDICTION CENTER NORMAN OK
0325 PM CDT THU JUN 10 2010
AREAS AFFECTED...PARTS OF NE CO...NW/N CNTRL KS...SW/S CNTRL NEB
CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE
VALID 102025Z - 102230Z
THE INITIATION OF STORMS IS STILL UNCERTAIN...BUT TRENDS ARE BEING
MONITORED FOR THE POSSIBILITY OF AN INCREASING SEVERE THREAT AND WW.
INHIBITION FOR MOIST BOUNDARY LAYER PARCELS STILL APPEARS
CONSIDERABLE ACROSS MUCH OF THE REGION...BENEATH VERY WARM ELEVATED
MIXED LAYER AIR ADVECTING OFF THE ROCKIES. BUT RUC GUIDANCE
INDICATES THAT CAPE HAS BECOME LARGE...ON THE ORDER OF 3000-4000
J/KG...IN RESPONSE TO STRONG SURFACE HEATING IN THE PRESENCE OF
STEEP MID-LEVEL LAPSE RATES. AND POCKETS OF STRONGER BOUNDARY LAYER
CONVERGENCE APPEAR TO BE DEVELOPING NORTHEAST OF THE LEE SURFACE
CYCLONE...AS WELL AS ALONG A REMNANT CONVECTIVELY GENERATED OR
ENHANCED BOUNDARY NOW IN THE VICINITY OF THE KANSAS/ NEBRASKA BORDER
AREA. COUPLED WITH LIFT ASSOCIATED WITH BROADER SCALE WARM
ADVECTION...FORCING MAY BECOME SUFFICIENT FOR ISOLATED TO WIDELY
SCATTERED STORM DEVELOPMENT DURING THE 21-23Z TIME FRAME. THIS IS
SUPPORTED BY THE LATEST HIGH RESOLUTION RAPID REFRESH. IF THIS DOES
INDEED OCCUR...VERTICAL SHEAR ASSOCIATED WITH MODESTLY STRONG AND
VEERING WIND FIELDS WITH HEIGHT IS PROBABLY SUFFICIENT FOR
SUPERCELLS. IN ADDITION TO THE RISK FOR LARGE HAIL...ISOLATED
TORNADOES ARE POSSIBLE. BUT...THERMODYNAMIC PROFILES APPEAR MORE
FAVORABLE FOR STRONG DOWNBURSTS AND SURFACE COLD POOL
EVOLUTION...ACCOMPANIED BY POTENTIALLY DAMAGING WIND GUSTS.
..KERR.. 06/10/2010
ATTN...WFO...OAX...TOP...ICT...GID...LBF...DDC...GLD...PUB...
BOU...
LAT...LON 39140305 40030316 40890214 41030107 40589814 39959707
38599767 38509898 38389977 37600039 37430161 38230174
38530196 38790261 39140305
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