Tornado Watch 801

Issued

Sep 5, 2004, 3:00 PM CDT (20:00 UTC)

Expired

Sep 5, 2004, 9:00 PM CDT

In force

6 hr

Issued by

the Storm Prediction Center

The Minneapolis radar (KMPX), 171 km from the middle of the area, began a volume at 20:01 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 2165Sep 5, 2:34 PM CDT
• Mesoscale Discussion 2168Sep 5, 5:39 PM CDT
• Mesoscale Discussion 2171Sep 5, 8:03 PM CDT

000 
WWUS20 KWNS 051959
SEL1  
SPC WW 052000
IAZ000-MNZ000-060200-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 801
NWS STORM PREDICTION CENTER NORMAN OK
300 PM CDT SUN SEP 5 2004

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

       WESTERN AND CENTRAL IOWA
       CENTRAL AND SOUTHERN MINNESOTA

EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 300 PM UNTIL 900
PM CDT.

TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 80 STATUTE MILES EAST AND WEST
OF A LINE FROM 50 MILES NORTH NORTHEAST OF REDWOOD FALLS MINNESOTA
TO 20 MILES WEST OF LAMONI IOWA.

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 800...

DISCUSSION...SCATTERED THUNDERSTORMS ARE DEVELOPING IN A PRE-FRONTAL
BAND ACROSS ERN NEB/WRN IA NWD INTO SW AND SRN MN.  WHILE MID LEVEL
LAPSE RATES ARE POOR OVER THIS AREA...RELATIVELY STEEP LOW-LEVEL
LAPSE RATES/BOUNDARY LAYER DEWPOINTS NEAR 70 F...ALONG WITH
INCREASING VERTICAL SHEAR WITH TIME...WILL SUPPORT A THREAT FOR
SUPERCELLS AND A FEW TORNADOES THIS AFTERNOON INTO THIS EVENING.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.
MEAN STORM MOTION VECTOR 23035.


...THOMPSON

451,0930 403,0924 403,0955 451,0961

Tornado Watches in Iowa, 2004Tornado Watches in Minnesota, 2004Every tornado watch in 2004

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.