Tornado Watch 580

Issued

Jun 24, 2003, 2:15 PM CDT (19:15 UTC)

Expired

Jun 24, 2003, 10:00 PM CDT

In force

8 hr

Issued by

the Storm Prediction Center

The North Platte radar (KLNX), 165 km from the middle of the area, began a volume at 19:15 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 1489Jun 24, 1:29 PM CDT
• Mesoscale Discussion 1494Jun 24, 5:59 PM CDT
• Mesoscale Discussion 1497Jun 24, 7:09 PM CDT

000 
WWUS20 KWNS 241919
SEL0  
SPC WW 241915
IAZ000-MNZ000-NEZ000-SDZ000-250300-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 580 
NWS STORM PREDICTION CENTER NORMAN OK 
215 PM CDT TUE JUN 24 2003

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

       NORTHWEST IOWA
       SOUTHWEST MINNESOTA
       CENTRAL AND NORTHEAST NEBRASKA
       SOUTHEAST SOUTH DAKOTA

EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 215 PM UNTIL
1000 PM CDT.

TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 80 STATUTE MILES NORTH AND
SOUTH OF A LINE FROM 30 MILES WEST SOUTHWEST OF MULLEN NEBRASKA TO
25 MILES NORTHEAST OF WORTHINGTON 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.




DISCUSSION...ISOLATED SEVERE STORMS MAY DEVELOP BY ABOUT 21Z ALONG
THE ENE-WSW ORIENTED FRONT ACROSS NRN NEB AND SE SD AS THE CAP
WEAKENS AND CONVERGENCE/ASCENT PERSISTS ALONG THE BOUNDARY. 
OTHERWISE...EXPECT COVERAGE OF STORMS TO INCREASE LATER THIS
AFTERNOON/EVENING AS LARGE SCALE ASCENT OVERSPREADS THIS AREA IN
ADVANCE OF A MID LEVEL TROUGH OVER THE ROCKIES AND SURFACE LOW IN SW
NEB.  MLCAPE VALUES OF 3000-4000 J/KG ...INCREASING VERTICAL
SHEAR...AND BOUNDARY LAYER DEW POINTS IN THE 70S ARE ALL FAVORABLE
FOR SUPERCELLS WITH VERY LARGE HAIL AND TORNADOES.  THE THREAT FOR
DAMAGING WINDS MAY INCREASE LATER THIS EVENING AS STORMS EVOLVE INTO
ONE OR MORE CLUSTERS ALONG THE SURFACE BOUNDARY.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 600.
MEAN STORM MOTION VECTOR 23030.


...THOMPSON

430,1013 450,0951 424,0951 404,1013 

WWUS20 KWNS 241919
SEL0  
SPC WW 241915
IAZ000-MNZ000-NEZ000-SDZ000-250300-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 580 
NWS STORM PREDICTION CENTER NORMAN OK 
215 PM CDT TUE JUN 24 2003

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

       NORTHWEST IOWA
       SOUTHWEST MINNESOTA
       CENTRAL AND NORTHEAST NEBRASKA
       SOUTHEAST SOUTH DAKOTA

EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 215 PM UNTIL
1000 PM CDT.

TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 80 STATUTE MILES NORTH AND
SOUTH OF A LINE FROM 30 MILES WEST SOUTHWEST OF MULLEN NEBRASKA TO
25 MILES NORTHEAST OF WORTHINGTON 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.




DISCUSSION...ISOLATED SEVERE STORMS MAY DEVELOP BY ABOUT 21Z ALONG
THE ENE-WSW ORIENTED FRONT ACROSS NRN NEB AND SE SD AS THE CAP
WEAKENS AND CONVERGENCE/ASCENT PERSISTS ALONG THE BOUNDARY. 
OTHERWISE...EXPECT COVERAGE OF STORMS TO INCREASE LATER THIS
AFTERNOON/EVENING AS LARGE SCALE ASCENT OVERSPREADS THIS AREA IN
ADVANCE OF A MID LEVEL TROUGH OVER THE ROCKIES AND SURFACE LOW IN SW
NEB.  MLCAPE VALUES OF 3000-4000 J/KG ...INCREASING VERTICAL
SHEAR...AND BOUNDARY LAYER DEW POINTS IN THE 70S ARE ALL FAVORABLE
FOR SUPERCELLS WITH VERY LARGE HAIL AND TORNADOES.  THE THREAT FOR
DAMAGING WINDS MAY INCREASE LATER THIS EVENING AS STORMS EVOLVE INTO
ONE OR MORE CLUSTERS ALONG THE SURFACE BOUNDARY.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 600.
MEAN STORM MOTION VECTOR 23030.


...THOMPSON

430,1013 450,0951 424,0951 404,1013

Tornado Watches in Nebraska, 2003Tornado Watches in South Dakota, 2003Tornado Watches in Minnesota, 2003Every tornado watch in 2003

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.