Tornado Watch 474

Issued

Jun 13, 2005, 3:25 PM CDT (20:25 UTC)

Expired

Jun 13, 2005, 11:00 PM CDT

In force

8 hr

Issued by

the Storm Prediction Center

The Des Moines radar (KDMX), 102 km from the middle of the area, began a volume at 20:28 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

• Mesoscale Discussion 1328Jun 13, 1:56 PM CDT
• Mesoscale Discussion 1331Jun 13, 3:49 PM CDT
• Mesoscale Discussion 1334Jun 13, 5:42 PM CDT
• Mesoscale Discussion 1338Jun 13, 7:42 PM CDT
• Mesoscale Discussion 1343Jun 13, 10:29 PM CDT

000 
WWUS20 KWNS 132028
SEL4  
SPC WW 132028
IAZ000-MNZ000-140400-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 474
NWS STORM PREDICTION CENTER NORMAN OK
325 PM CDT MON JUN 13 2005

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF 

       MUCH OF IOWA
       A SMALL PART OF SOUTHWEST MINNESOTA

EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 325 PM UNTIL 1100
PM CDT.

TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 90 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 120 STATUTE
MILES EAST AND WEST OF A LINE FROM 45 MILES NORTHWEST OF MASON
CITY IOWA TO 35 MILES SOUTH OF OTTUMWA IOWA.  FOR A COMPLETE
DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE
(WOUS64 KWNS WOU4).

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 471...WW 472...WW 473...

DISCUSSION...SUPERCELLS EXPECTED TO DEVELOP IN THE NEXT 1-2 HOURS
ACROSS WRN PART OF WW...IN ZONE OF INCREASING LOW LVL
CONVERGENCE/DESTABILIZATION DOWNSTREAM FROM POTENT NEB UPR VORT. 
ACTIVITY SHOULD MOVE/DEVELOP QUICKLY NEWD...AND EVENTUALLY DEVELOP
INTO ONE OR MORE BANDS.
INTENSE MID/UPR LVL WIND FIELD PER AREA 18Z SOUNDINGS WILL RESULT IN
LONG...SLIGHTLY CURVED HODOGRAPHS SUPPORTIVE OF POSSIBLE
STRONG/LONG-LIVED TORNADOES IN ADDITION TO BOWING SEGMENTS WITH VERY
HIGH WIND/HAIL.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 80 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.
MEAN STORM MOTION VECTOR 23045.


...CORFIDI

433,0913 403,0900 403,0944 433,0962

Tornado Watches in Iowa, 2005Tornado Watches in Illinois, 2005Every tornado watch in 2005

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.