Tornado Watch 676

Issued

Jul 31, 2004, 3:00 PM CDT (20:00 UTC)

Expired

Jul 31, 2004, 10:00 PM CDT

In force

7 hr

Issued by

the Storm Prediction Center

The Sioux Falls radar (KFSD), 161 km from the middle of the area, began a volume at 20:02 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 1806Jul 31, 12:10 PM CDT
• Mesoscale Discussion 1808Jul 31, 4:43 PM CDT
• Mesoscale Discussion 1809Jul 31, 8:19 PM CDT

386 
WWUS20 KWNS 312000
SEL6  
SPC WW 312000
IAZ000-MNZ000-SDZ000-010300-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 676
NWS STORM PREDICTION CENTER NORMAN OK
300 PM CDT SAT JUL 31 2004

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

       NORTHERN IOWA
       SOUTHERN AND CENTRAL MINNESOTA
       EASTERN SOUTH DAKOTA

EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 300 PM UNTIL
1000 PM CDT.

TORNADOES...HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS ALONG AND 100 STATUTE MILES NORTH AND
SOUTH OF A LINE FROM 45 MILES SOUTHWEST OF WATERTOWN SOUTH DAKOTA
TO 25 MILES EAST SOUTHEAST OF MINNEAPOLIS MINNESOTA.

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 675...

DISCUSSION...ISOLATED SEVERE STORMS ARE FORECAST TO DEVELOP IN THE
NEXT 1-2 HOURS ACROSS SOUTHERN MN IN REGION OF LOW LEVEL WARM
ADVECTION AND ELEVATED CAPE.  FURTHER DEVELOPMENT SHOULD OCCUR
DURING THE EVENING  OVER EASTERN SD AND WESTERN MN AS UPSTREAM
TROUGH APPROACHES.  POTENTIAL EXISTS FOR SUPERCELLS CAPABLE OF LARGE
HAIL AND DAMAGING WINDS.  ISOLATED TORNADOES MAY ALSO OCCUR ALONG
AND JUST NORTH OF SURFACE FRONT ACROSS MN.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
550. MEAN STORM MOTION VECTOR 30030.


...HART

455,0974 461,0924 431,0924 430,0974

Tornado Watches in Minnesota, 2004Tornado Watches in South Dakota, 2004Tornado Watches in Iowa, 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.