

780 

WWUS20 KWNS 210359

SEL0

SPC WW 210359

IAZ000-MNZ000-211100-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 530

NWS STORM PREDICTION CENTER NORMAN OK

1100 PM CDT MON JUN 20 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       EASTERN IOWA

       SOUTHERN MINNESOTA



EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 1100 PM

UNTIL 600 AM CDT.



TORNADOES...HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 50 STATUTE

MILES EAST AND WEST OF A LINE FROM 15 MILES NORTH NORTHEAST OF

FAIRMONT MINNESOTA TO 35 MILES SOUTH OF OTTUMWA IOWA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU0).



REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR

TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH

AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR

THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS

AND POSSIBLE WARNINGS.



OTHER WATCH INFORMATION...CONTINUE...WW 525...WW 526...WW

528...WW 529...



DISCUSSION...BROKEN SQLN EXPECTED TO CONTINUE MOVING NEWD THROUGH

CNTRL IA INTO S CNTRL MN.  STRENGTH OF LOW LVL SHEAR AND QUALITY OF

MOIST SELY LOW LVL INFLOW SUGGEST CONTINUED POTENTIAL FOR EMBEDDED

LOW LVL MESOCYCLONES/POSSIBLE TORNADOES.  WDLY SCTD MORE DISCRETE

STORMS WITH A POTENTIAL FOR TORNADOES ALSO MAY FORM AHEAD OF SQLN

INVOF DIFFUSE W-E WARM FRONT...WHERE NEAR SFC FLOW WILL REMAIN MORE

STRONGLY BACKED.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

550. MEAN STORM MOTION VECTOR 20030.





...CORFIDI

