Tornado Watch 587

Issued

Jun 24, 2003, 8:35 PM CDT (01:35 UTC)

Expired

Jun 25, 2003, 2:00 AM CDT

In force

5 hr

Issued by

the Storm Prediction Center

The North Platte radar (KLNX), 116 km from the middle of the area, began a volume at 01:37 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 1494Jun 24, 5:59 PM CDT
• Mesoscale Discussion 1495Jun 24, 6:28 PM CDT
• Mesoscale Discussion 1496Jun 24, 6:30 PM CDT
• Mesoscale Discussion 1500Jun 24, 9:52 PM CDT
• Mesoscale Discussion 1501Jun 24, 10:27 PM CDT

000 
WWUS20 KWNS 250135
SEL7  
SPC WW 250135
IAZ000-MNZ000-NEZ000-SDZ000-250700-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 587 
NWS STORM PREDICTION CENTER NORMAN OK 
835 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 NIGHT AND WEDNESDAY MORNING FROM 835 PM
UNTIL 200 AM CDT.

...THIS IS A PARTICULARLY DANGEROUS SITUATION...

DESTRUCTIVE TORNADOES...LARGE HAIL TO 3 INCHES IN DIAMETER...
THUNDERSTORM WIND GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE
POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 90 STATUTE MILES EAST AND WEST
OF A LINE FROM 30 MILES NORTHEAST OF BROOKINGS SOUTH DAKOTA TO 15
MILES SOUTH SOUTHEAST OF MCCOOK NEBRASKA.

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...THIS TORNADO WATCH REPLACES TORNADO
WATCH NUMBER 580. WATCH NUMBER 580 WILL NOT BE IN EFFECT AFTER 835
PM CDT. CONTINUE...WW 581...WW 585...WW 586...WW 587...


DISCUSSION...VERY ACTIVE NIGHT WITH WIDESPREAD SEVERE THUNDERSTORMS
AND SUPERCELLS ACROSS WW...AS STRONG COLD FRONT AND UPPER TROUGH
ENHANCE CONVECTION OVER THE CENTRAL PLAINS.  COMBINATION OF STRONG
SHEAR AND INSTABILITY...ALONG WITH LOW LCLS...SHOULD MAINTAIN A
THREAT OF TORNADOES WITHIN WW FOR SEVERAL MORE HOURS.  A FEW STRONG
OR VIOLENT TORNADOES MAY OCCUR...ESPECIALLY INTO SERN SD/SWRN MN AS
PRESSURE FALLS ASSOCIATED WITH SURFACE LOW BACK LOW LEVEL FLOW. 
ISOLATED VERY LARGE HAIL IS ALSO A THREAT.  WIND DAMAGE THREAT
SHOULD INCREASE AS BOW SEGMENTS EVOLVE OUT OF LARGER SQUALL LINE
LATER THIS EVENING.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 650.
MEAN STORM MOTION VECTOR 24025.


...EVANS

443,0943 395,0984 395,1021 443,0981

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.