MESOSCALE DISCUSSION 0836
NWS STORM PREDICTION CENTER NORMAN OK
1133 PM CDT SAT MAY 22 2004
AREAS AFFECTED...SERN NEB/NERN KS/SRN IA
CONCERNING...TORNADO WATCH 256...
VALID 230433Z - 230600Z
...DANGEROUS BOW ECHO MOVING ACROSS SRN IA...
INTENSE BOX ECHO COMPLEX MOVING AT 50-60KT AND PRODUCING WINDS
POSSIBLY IN EXCESS OF 80KT CONTINUES MOVING EAST ACROSS SRN IA. APEX
OF THE BOW WILL CONTINUE TO ENCOUNTER INTENSE INFLOW AND LOW LEVEL
SHEAR AS IT ENCOUNTERS OUTFLOW BOUNDARY EXTENDING ENEWD FROM MADISON
COUNTY. DAMAGING TO EXTREME WINDS MAY OCCUR ACROSS NRN WARREN/MARION
COUNTIES EAST TO JASPER AND POWESHIEK COUNTIES OVER THE NEXT HOUR.
TO THE WEST...ANOTHER BOWING LINE OF INTENSE CONVECTION WAS
DEVELOPING EAST FROM OTOE AND JOHNSON COUNTIES IN EXTREME SERN NEB.
THIS ACTIVITY WAS TRACKING EAST AT 50KT AND WILL PROBABLY PRODUCE
WIND DAMAGE ALONG THE MO/IA BORDER WITHIN THE NEXT HOUR.
..CARBIN.. 05/23/2004
ATTN...WFO...DVN...ARX...DMX...EAX...OAX...TOP...ICT...GID...
40239784 42759108 41039106 38439797
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