Saturday, April 21, 2007

MESO: Mesoscale Discussion 0529

ACUS11 KWNS 212321
SWOMCD
SPC MCD 212320
MNZ000-SDZ000-NEZ000-220115-

MESOSCALE DISCUSSION 0529
NWS STORM PREDICTION CENTER NORMAN OK
0620 PM CDT SAT APR 21 2007

AREAS AFFECTED...CENTRAL AND NERN SD

CONCERNING...TORNADO WATCH 155...

VALID 212320Z - 220115Z

THE SEVERE WEATHER THREAT FOR TORNADO WATCH 155 CONTINUES.
SUPERCELL ACTIVITY OVER NERN CHERRY COUNTY NEB WILL BE MOVING NEWD
NEXT SEVERAL HOURS INTO AREA WHERE 0-1 KM SHEAR IS AROUND 200 M2/S2.
AIR MASS IS VERY UNSTABLE WITH MLCAPE BETWEEN 1500-2000 J/KG AND
DEEP LAYER SHEAR UP TO 60 KT.

ACTIVITY WILL BE MOVING INTO THE SRN COUNTIES OF THE WW DURING THE
NEXT HOUR AND SPREAD NEWD THROUGH THE NEXT SEVERAL HOURS. GIVEN THE
AMOUNT OF FAVORABLE SHEAR AND INCREASING STORM RELATIVE FLOW...
TORNADOES AND LARGE HAIL WILL BE THE MAIN THREATS.

.MCCARTHY.. 04/21/2007

..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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