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April 14-17th Severe Weather (Day 3 Mod)


Chicago Storm

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DISCUSSION...A QUASI-STATIONARY BOUNDARY EXTENDS FROM JUST W OF BVO

TO NRN PORTIONS OF OKC METRO TO S OF CDS. RECENT RADAR IMAGERY FROM

KTLX SHOWS THE BOUNDARY HAS BEGUN TO MOVE SWD OVER CENTRAL

OK...POSSIBLY AS A RESULT OF OUTFLOW FROM POST-FRONTAL CONVECTION NW

OF OKC. A SUPERCELL TSTM NEAR LAWTON OK WILL CONTINUE MOVG NEWD IN

AN ENVIRONMENT FAVORABLE FOR LOW-LEVEL ROTATION/TORNADO DEVELOPMENT

AS STRENGTHENING LOW-MID-LEVEL FLOW FURTHER ENHANCES 0-1 KM SRH

VALUES THROUGH 00Z. THIS STORM WILL LIKELY REMAIN OUT AHEAD OF THE

SURFACE BOUNDARY THROUGH 00Z AS IT MOVES NEAR/ALONG THE I-44

CORRIDOR. OTHER SUPERCELL TSTM DEVELOPMENT OVER FAR SWRN OK/NWRN TX

IS LOCATED TO THE EAST OF THE FRONTAL BOUNDARY/DRYLINE TRIPLE POINT

AND WILL ALSO HAVE THE POTENTIAL TO PRODUCE TORNADOES...LARGE HAIL

AND DAMAGING WINDS IN A STRONGLY-SHEARED AND RELATIVELY LOW-LCL

ENVIRONMENT.

 

LATEST CONVECTION-ALLOWING MODEL GUIDANCE SUGGESTS THAT ADDITIONAL

SUPERCELL DEVELOPMENT MAY OCCUR OVER SOUTH-CENTRAL OK DURING THE

NEXT FEW HOURS...AND RECENT RADAR IMAGERY SHOWS A SLIGHT INCREASE IN

CONVECTIVE ECHOES. AN EWD EXTENSION OF CURRENT WW MAY BE NEEDED IF

THIS SCENARIO BEGINS TO UNFOLD.

 

TO THE WEST OF THE SURFACE BOUNDARY...TSTMS MAY EXHIBIT MID-LEVEL

ROTATION BUT WITH SURFACE OBS SHOWING SEVERAL DEGREES OF COOLING

ASSOCIATED WITH FRONTAL PASSAGE...LARGE HAIL AND PERHAPS DAMAGING

WINDS WILL BE THE PRIMARY THREATS.
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The cells in SW OK have congealed into a messy cluster with embedded rotation. Not exactly sure what the downscale evolution of this will be once the best dynamics arrive, but If it can remain ahead of the boundary then I supposed it could produce at least a long term threat for damaging winds and possibly tornadoes. 

 

TX cells seem to really be taking off now:

 

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