Tornado Watch 691

Issued

Jul 8, 2003, 7:45 PM MDT (01:45 UTC)

Expired

Jul 9, 2003, 1:00 AM MDT

In force

5 hr

Issued by

the Storm Prediction Center

The Aberdeen radar (KABR), 159 km from the middle of the area, began a volume at 01:46 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 1719Jul 8, 4:38 PM MDT
• Mesoscale Discussion 1722Jul 8, 5:46 PM MDT
• Mesoscale Discussion 1727Jul 8, 10:30 PM MDT

000 
WWUS20 KWNS 090152
SEL1  
SPC WW 090145
NDZ000-NEZ000-SDZ000-090700-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 691 
NWS STORM PREDICTION CENTER NORMAN OK 
745 PM MDT TUE JUL 8 2003

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

       SOUTHERN NORTH DAKOTA
       NORTHERN NEBRASKA
       WESTERN...CENTRAL AND SOUTHERN SOUTH DAKOTA

EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 745 PM
UNTIL 100 AM MDT.

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 150 STATUTE MILES EAST AND
WEST OF A LINE FROM 55 MILES NORTHEAST OF LEMMON SOUTH DAKOTA TO
25 MILES WEST OF BURWELL 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 685. WATCH NUMBER 685 WILL NOT BE IN EFFECT AFTER 745
PM MDT. CONTINUE...WW 687...WW 688...WW 689...WW 690...


DISCUSSION...SUPERCELLS CLUSTER IN NW SD EXPECTED TO MOVE/DEVELOP
SEWD LATER THIS EVENING. OTHER SUPERCELLS MAY EVOLVE FROM HIGH-BASED
ACTIVITY NOW IN NRN NEB...AND ALONG WARM FRONT/OUTFLOW BOUNDARY IN
CNTRL SD.  INCREASING MID/UPPER LEVEL FLOW ASSOCIATED WITH UPPER
IMPULSE MOVING ESE FROM MT...AND PERSISTENT ESE LOW LEVEL WINDS
SUGGEST GOOD CHANCE FOR TORNADOES/LARGE HAIL AS LONG AS STORMS
REMAIN ISOLATED.  ACTIVITY SHOULD MERGE INTO AN MCS WITH BOWING
SEGMENTS AND HIGH WIND/HAIL LATER TONIGHT.

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 30030.


...CORFIDI

462,0981 414,0964 414,1023 462,1043

Tornado Watches in South Dakota, 2003Tornado Watches in Nebraska, 2003Tornado Watches in North Dakota, 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.