Mesoscale Discussion 1085

MESOSCALE DISCUSSION 1085
NWS STORM PREDICTION CENTER NORMAN OK
0555 PM CDT THU MAY 29 2008
AREAS AFFECTED...MUCH OF CENTRAL/ERN NEB...NRN KS...SWRN IA
CONCERNING...TORNADO WATCH
386
...
VALID 292255Z - 292330Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 386 CONTINUES.
NEW TORNADO WATCH WILL BE NEEDED TO THE EAST OF WW 386...ACROSS THE
REST OF ERN NEB INTO PARTS OF SWRN IA/NERN KS.
AREA WSR-88D VWPS AND WIND PROFILERS INDICATED 60 KT SWLY MID LEVEL
JET...ACCOMPANYING SHORT WAVE TROUGH CURRENTLY MOVING ENEWD THROUGH
THE DAKOTAS...HAS SPREAD INTO CENTRAL/ERN NEB AND FAR NRN KS LATE
THIS AFTERNOON. THIS JET COMBINED WITH FURTHER STRENGTHENING OF
SSWLY LLJ UP TO 50-60 KT EXTENDING INTO ERN NEB/SWRN IA THIS EVENING
WILL CONTINUE TO FAVOR A KINEMATIC ENVIRONMENT VERY FAVORABLE FOR
LONG-LIVED SUPERCELLS WITH ATTENDANT TORNADOES. THIS TORNADO THREAT
HAS ALREADY BEEN AND CONTINUES TO BE OBSERVED ACROSS SOUTH CENTRAL
NEB AND OVER NWRN INTO NORTH CENTRAL KS...GIVEN REGIONAL RADAR
INDICATION OF LONG-LIVED TORNADIC SUPERCELLS. INFLUX OF
MOIST/MODERATE INSTABILITY WITH THE LLJ WILL FURTHER ENHANCE THE
TORNADO THREAT.
SHORT TERM MODELS SUGGEST STORM MODE SHOULD REMAIN DISCRETE/
SUPERCELLULAR THROUGH 02-03Z...PRIOR TO A TRANSITION INTO AN
EVENTUAL LINEAR MODE ACROSS IA LATER THIS EVENING.
..PETERS.. 05/29/2008