SWOMCD
SPC MCD 240333
KSZ000-NEZ000-OKZ000-TXZ000-240430-
MESOSCALE DISCUSSION 0993
NWS STORM PREDICTION CENTER NORMAN OK
1033 PM CDT FRI MAY 23 2008
AREAS AFFECTED...SRN NEB...MUCH OF CENTRAL KS...ERN TX
PANHANDLE...ERN OK PANHANDLE INTO WRN OK
CONCERNING...TORNADO WATCH 342...344...
VALID 240333Z - 240430Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 342...344...CONTINUES.
...SQUALL LINE EVOLVING INTO DISCRETE SUPERCELLS WITH INCREASING
POTENTIAL FOR TORNADOES...
REGIONAL RADARS SHOWED SQUALL LINE THAT FORMED EARLIER HAS NOW
EVOLVED INTO A BROKEN LINE OF MORE DISCRETE-TYPE SUPERCELLS
EXTENDING FROM THE NERN TX PANHANDLE TO JUST EAST OF HLC.
THERMODYNAMIC AND KINEMATIC ENVIRONMENTS REMAIN VERY FAVORABLE FOR
STRONG LONG-LIVED TORNADOES AS THIS ACTIVITY SPREADS ENEWD DURING
THE NEXT SEVERAL HOURS. AREA WIND PROFILERS AND WSR-88D VWP DATA
SHOWED MID LEVEL WINDS VEERING TO SWLY...AS INDICATED BY SHORT TERM
MODELS. THIS WILL CONTINUE TO SUPPORT THE EVOLUTION OF MORE
DISCRETE STORMS INTO THE LATE EVENING/EARLY OVERNIGHT PERIOD.
STRONG SLY LLJ FROM OK INTO KS COMBINED WITH THE VEERING MID LEVEL
WINDS WILL SUPPORT A FURTHER INCREASE IN LOW LEVEL SHEAR WITH
EFFECTIVE SRH VALUES NOW RANGING FROM 400-600 M2/S2. THIS SUPPORTS
THE POTENTIAL FOR LONG-LIVED STRONG TO VIOLENT TORNADOES.
ADDITIONAL STORM DEVELOPMENT IS EXPECTED SWD THROUGH THE ERN TX
PANHANDLE AS THE COLD FRONT CONTINUES TO SPREAD EWD OVERTAKING THE
DRY LINE. THIS TREND APPEARS LIKELY GIVEN RECENT NEW TSTM
DEVELOPMENT IN THE NERN TX PANHANDLE...AND GIVEN FAVORABLE
INSTABILITY AND STRONG EFFECTIVE BULK SHEAR FOR ORGANIZED STORMS.
..PETERS.. 05/24/2008
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...OAX...TOP...ICT...OUN...GID...LBF...DDC...GLD...LUB...AMA...
34730100 35960073 37030008 38209984 38430000 39150081
39580096 39590129 40310133 40390021 40719987 40729730
40009737 40009679 39649672 38569692 38419729 38079714
37039716 36959799 36219808 35639828 35289854 34869866
34609884 34349928
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