Saturday, April 21, 2007

MESO: Mesoscale Discussion 0532

ACUS11 KWNS 220056
SWOMCD
SPC MCD 220056
MNZ000-SDZ000-NEZ000-220300-

MESOSCALE DISCUSSION 0532
NWS STORM PREDICTION CENTER NORMAN OK
0756 PM CDT SAT APR 21 2007

AREAS AFFECTED...WRN AND CENTRAL NEB...AND CENTRAL AND NERN SD

CONCERNING...TORNADO WATCH 154...155...

VALID 220056Z - 220300Z

THE SEVERE WEATHER THREAT FOR TORNADO WATCH 154...155...CONTINUES.

STRONGEST ACTIVITY IS NOW LIFTING NEWD ACROSS GREGORY INTO CHARLIE
MIX COUNTIES IN SD. ENVIRONMENT REMAINS FAVORABLE FOR STRONG
UPDRAFTS/SUPERCELLS AS DEEP LAYER SHEAR CONTINUES AT 60 KT WITH
MLCAPE BETWEEN 1500 AND 2000 J/KG. ACTIVITY CONTINUES TO BE
SUPPORTED BY STRONG SFC-LOW LEVEL FLOW AS OBSERVATIONS INDICATE
30-40 KT INFLOW FROM THE SOUTH COUPLED WITH 30-40 KT LOW LEVEL JET.

MUCH OF THE ACTIVITY ACROSS SWRN NEB ARE COMPETING FOR THE INFLOW
NOW AS THERE ARE NUMEROUS CELLS ALONG THE DRYLINE SWD INTO THE TX
PANHANDLE. IR SATELLITE IMAGERY SHOWS THAT ANVILS ARE OVERLAPPING
NOW ALONG THE DRYLINE AS MAIN AREA OF DYNAMICS WILL BE ADVANCING
INTO W TX THIS EVENING. THUS...MUCH OF THE MAIN THREAT IS TURNING
INTO A HAIL THREAT WITH SOME DAMAGING WINDS. HOWEVER...THE AREAS
OVER SRN SD LOOK TO BE THE MAIN TORNADO THREAT WHERE 0-1KM INFLOW
REMAINS FAVORABLE TO ENHANCE LOW LEVEL SHEAR.

.MCCARTHY.. 04/22/2007

..PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...MPX...FSD...OAX...ABR...LBF...UNR...

43010121 43240119 43430122 43670123 43800121 43820112
43900108 44060108 44130109 44200117 44290118 44410116
44580115 44670113 44740107 44750089 44770074 44790058
44880044 45060039 45230036 45350035 45540037 45780038
45870042 45860020 45819969 45849937 45819867 45829823
45879788 45879741 45849691 45849662 45779663 45659682
45539686 45489684 45439673 45389663 45249645 45159646
45029645 44859644 44709644 44619643 44539644 44529657
44549695 44539710 44469716 44369717 44249716 44209716
44189727 44189733 44119735 43999737 43879739 43849740
43799764 43799783 43809796 43679800 43559801 43469803
43389811 43279812 43099808 42989807 42879805 42849811
42859831 43009854 42989876 42989920 42989987 42980021
42970072 42980110

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