Ed Mahmoud wrote:Reading the new SPC MCD, winds going L&V, pressure rises over, decent dews North of the outflow boundary, I am glass one eight optimistic on development inland where it would help my lawn...
MESOSCALE DISCUSSION 0445
NWS STORM PREDICTION CENTER NORMAN OK
1219 PM CDT WED APR 04 2012
AREAS AFFECTED...MIDDLE AND UPPER TX COAST/COASTAL PLAIN
CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE
VALID 041719Z - 041845Z
POTENTIAL INCREASE IN STORM COVERAGE WITHIN DESTABILIZING AIRMASS
ACROSS THE MIDDLE AND UPPER TX COASTAL REGION COULD REQUIRE WW
ISSUANCE.
LATEST RADAR IMAGERY REVEALS TWO STORMS INVOF THE KHOU /HOUSTON TX/
AREA ATTM...WITH AT LEAST SOME SUPERCELL CHARACTERISTICS EVIDENT.
WITH A MOIST/HEATING BOUNDARY LAYER BENEATH STEEP LAPSE
RATES...ADDITIONAL DESTABILIZATION THIS AFTERNOON WILL PROVIDE A
THERMODYNAMIC ENVIRONMENT INCREASINGLY FAVORABLE FOR ROBUST
CONVECTION.
ALONG WITH THE DESTABILIZING ENVIRONMENT...KHGX /HOUSTON TX/ WSR-88D
VWP CONTINUES TO REVEAL SHEAR SUPPORTIVE OF SUPERCELLS...WITH 50 KT
WSWLYS AT MID LEVELS. THESE FACTORS SUGGEST THAT ANY STORM WHICH
DEVELOPS WILL ORGANIZE/ROTATE...WITH ATTENDANT THREATS FOR LARGE
HAIL AND LOCALLY DAMAGING WINDS.
THE MAIN LIMITING FACTOR ATTM APPEARS TO BE AN OVERALL LACK OF
LARGE-SCALE ASCENT...AS THE MAIN UPPER SYSTEM REMAINS WELL TO THE NW
OVER THE TX PANHANDLE. THOUGH A VERY WEAK FEATURE APPEARS TO BE
MOVING ACROSS NRN MEXICO TOWARD THE LOWER RIO GRANDE VALLEY...THE
MAIN SUPPORT FOR STORM INITIATION APPEARS PRIMARILY AT LOW-LEVELS --
SPECIFICALLY AN OUTFLOW BOUNDARY WHICH HAS NEARLY STALLED JUST W/SW
OF KHGX...A SURFACE FRONT STALLED TO THE W OVER THE COASTAL
PLAIN...AND PERHAPS ALONG A WEAK MARINE FRONT ALONG THE COAST.
WHILE THIS SUGGESTS LIKELIHOOD THAT COVERAGE WILL REMAIN WIDELY
SCATTERED TO ISOLATED...WE WILL CONTINUE TO MONITOR THIS REGION FOR
DEGREE OF CONVECTIVE INITIATION...WHICH -- IF WIDESPREAD ENOUGH --
COULD REQUIRE WW ISSUANCE.
..GOSS.. 04/04/2012
ATTN...WFO...HGX...CRP...EWX...
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