Tornado Watch 804

Issued

Aug 3, 2008, 10:21 PM CDT (03:21 UTC)

Expired

Aug 4, 2008, 3:45 AM CDT

In force

5 hr

Issued by

the Storm Prediction Center

Largest hail expected

2.5 in

Strongest gust expected

70 kt

The Minneapolis radar (KMPX), 42 km from the middle of the area, began a volume at 03:23 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.

Two or more tornadoes

30%

One or more EF2 to EF5 tornadoes

30%

Ten or more severe wind reports

70%

One or more gusts of 65 knots or more

30%

Ten or more severe hail reports

80%

One or more hailstones of 2 inches or more

40%

Six or more combined severe hail and wind reports

95%

• Mesoscale Discussion 2019Aug 3, 8:38 PM CDT
• Mesoscale Discussion 2023Aug 4, 1:46 AM CDT

000
WWUS20 KWNS 040324
SEL4  
SPC WW 040324
MNZ000-WIZ000-041100-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 804
NWS STORM PREDICTION CENTER NORMAN OK
1025 PM CDT SUN AUG 3 2008

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

       SOUTHERN AND EASTERN MINNESOTA
       WESTERN WISCONSIN

EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 1025 PM UNTIL
600 AM CDT.

TORNADOES...HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 80 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 40 MILES NORTH NORTHWEST OF
EAU CLAIRE WISCONSIN TO 30 MILES EAST SOUTHEAST OF FAIRMONT
MINNESOTA.  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 803...

DISCUSSION...SLIGHTLY ELEVATED STORMS NOW FORMING OVER S CNTRL MN
LIKELY WILL CONTINUE TO MOVE/DEVELOP E/SE ALONG 925/850 MB THERMAL
GRADIENT.  WHILE ACTIVITY APPEARS TO PRIMARY BE DRIVEN BY WAA...WEAK
DPVA MAY ALSO BE PRESENT ON SERN FRINGE OF UPR IMPULSE EXITING THE
ERN DAKS.  COMBINATION OF VERY RICH BOUNDARY LAYER MOISTURE...BACKED
NEAR-SFC FLOW AND MODERATE WLY FLOW ALOFT SUGGEST POTENTIAL FOR
SUPERCELLS WITH LARGE HAIL/HIGH WIND AND...ESPECIALLY W OF THE MS
RVR...TORNADOES.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
550. MEAN STORM MOTION VECTOR 27035.


...CORFIDI

Tornado Watches in Minnesota, 2008Tornado Watches in Wisconsin, 2008Every tornado watch in 2008

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.