[MCD] SWOMCD

[MCD at goshenarc.org]

ACUS11 KWNS 220845
SWOMCD
SPC MCD 220844 
IAZ000-MOZ000-NEZ000-220945-

MESOSCALE DISCUSSION 0816
NWS STORM PREDICTION CENTER NORMAN OK
0344 AM CDT SAT MAY 22 2004

AREAS AFFECTED...PORTIONS OF ERN NEB INTO WRN IA

CONCERNING...SEVERE THUNDERSTORM WATCH 246...

VALID 220844Z - 220945Z

DAMAGING WIND/HAIL THREATS CONTINUE ACROSS VALID PORTIONS OF WW.

MESO-ANALYSES THROUGH 08Z SHOW A SURFACE BOUNDARY EXTENDING ACROSS
CENTRAL IA WNWWD TO NERN NEB.  A CONVECTIVE OUTFLOW BOUNDARY
ASSOCIATED WITH AN ONGOING THUNDERSTORM COMPLEX ACROSS CENTRAL IA
HAS MOVED SWD ACROSS ERN NEB/WRN IA...AND NOW EXTENDS FROM 45 SSW
ALO TO 45 SE OMA AND WWD TO NEAR HSI TO 25 SW EAR.  WIND PROFILER
DATA DURING THE LAST FEW HOURS SHOWED THE NOCTURNAL LLJ HAS VEERED
TO SWLY AS IT NOSES INTO WRN-CENTRAL IA.  THIS ORIENTATION IS
FOCUSING STRONGEST ASCENT FOR ADDITIONAL THUNDERSTORMS ACROSS FAR
ERN NEB INTO IA.  THUS...SEVERE THREAT APPEARS TO BE PRIMARILY
ACROSS ERN PORTION OF WW 246.  MODERATELY TO VERY UNSTABLE AIR MASS
AND 35-40 KT OF CAPE BEARING SHEAR WILL CONTINUE TO RESULT IN A
THREAT FOR HAIL/DAMAGING WINDS.  ALTHOUGH EWD MOVING LINE/BOW
SEGMENT ACROSS FAR ERN NEB ATTM MAY BE SLIGHTLY ELEVATED ATOP
SHALLOW STABLE LAYER TO THE NORTH OF OUTFLOW BOUNDARY...VERY STRONG
LLJ NOSING INTO WRN IA WILL SUPPORT FAST MOTION OF TSTM LINES AND
DAMAGING WIND POTENTIAL EWD INTO CENTRAL IA.

..PETERS.. 05/22/2004

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

ATTN...WFO...DMX...EAX...OAX...GID...

41529919 41399698 41979629 42079392 41029392 40639519
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