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MESOSCALE DISCUSSION 0372
NWS STORM PREDICTION CENTER NORMAN OK
0336 PM CDT THU APR 02 2009
AREAS AFFECTED...PARTS OF SE AR...CNTRL AND NRN MS
CONCERNING...TORNADO WATCH 105...
VALID 022036Z - 022130Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 105 CONTINUES.
THE POSSIBILITY OF A NEW WW WILL BE DISCUSSED WITH AFFECTED WFOS
PRIOR TO 21Z.
IN THE WAKE OF THE INITIAL BAND OF CONVECTION NOW SHIFTING AWAY FROM
THE MISSISSIPPI VALLEY...RAPID SURFACE PRESSURE FALLS ARE NOW
ONGOING NEAR THE MISSISSIPPI RIVER BETWEEN NATCHEZ AND MEMPHIS.
THIS IS OCCURRING IN THE WARM SECTOR OF A DEEPENING CYCLONE
CURRENTLY MIGRATING ACROSS CENTRAL ARKANSAS. ALTHOUGH RATHER
DIFFUSE...A DRY LINE TYPE STRUCTURE APPEARS TO EVOLVING ACROSS THE
LOWER MISSISSIPPI VALLEY. AND...THERE STILL APPEARS A WINDOW OF
OPPORTUNITY FOR FURTHER SHARPENING PRIOR TO COLD FRONTAL PASSAGE
EARLY THIS EVENING. AIDED BY FORCING AHEAD OF THE VIGOROUS
MID-LEVEL IMPULSE TURNING EASTWARD INTO THE LOWER MISSISSIPPI
VALLEY...THIS BOUNDARY MAY STILL PROMOTE VIGOROUS DISCRETE STORM
DEVELOPMENT LATE THIS AFTERNOON. IN THE PRESENCE OF STRONG DEEP
LAYER SHEAR AND SIZABLE CLOCKWISE CURVED LOW-LEVEL HODOGRAPHS...
SUPERCELLS WITH THE RISK FOR LARGE HAIL AND ISOLATED TORNADOES ARE
POSSIBLE.
..KERR.. 04/02/2009
ATTN...WFO...MEG...JAN...LZK...
LAT...LON 33749144 34769137 34889042 33748934 33118922 32178972
31869005 31709087 31959120 32759119 33749144
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