Tornado Watch 187

Issued

May 11, 2004, 3:55 PM CDT (20:55 UTC)

Expired

May 11, 2004, 9:00 PM CDT

In force

5 hr

Issued by

the Storm Prediction Center

The Aberdeen radar (KABR), 59 km from the middle of the area, began a volume at 20:57 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 651May 11, 1:32 PM CDT
• Mesoscale Discussion 656May 11, 5:04 PM CDT
• Mesoscale Discussion 658May 11, 5:37 PM CDT
• Mesoscale Discussion 660May 11, 6:53 PM CDT

000 
WWUS20 KWNS 112053
SEL7  
SPC WW 112055
MNZ000-NDZ000-SDZ000-120200-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 187
NWS STORM PREDICTION CENTER NORMAN OK
355 PM CDT TUE MAY 11 2004

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

       WESTERN MINNESOTA
       SOUTHEAST NORTH DAKOTA
       NORTHEAST SOUTH DAKOTA

EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 355 PM UNTIL 900
PM CDT.

TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 65 STATUTE MILES NORTH AND
SOUTH OF A LINE FROM 70 MILES WEST SOUTHWEST OF ABERDEEN SOUTH
DAKOTA TO 40 MILES EAST NORTHEAST OF ALEXANDRIA 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 184...WW 185...WW 186...

DISCUSSION...VERY STRONG LOW LEVEL JET CONTINUES TO PROVIDE
INCREASING MOISTURE INSTABILITY NWD AHEAD OF DEEP SURFACE LOW. 
PRONOUNCED WARM FRONT SHIFTING SLOWLY NWD THRU WRN MN. CAP HAS
WEAKENED SUFFICIENTLY TO ALLOW THUNDERSTORMS TO RAPIDLY DEVELOP
ALONG AND S OF WARM FRONT IN FAVORABLY SHEARED ENVIRONMENT. 
SUPERCELLS ARE LIKELY WITH LARGE HAIL AND TORNADO POTENTIAL.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550.
MEAN STORM MOTION VECTOR 24035.


...HALES

460,0994 470,0943 450,0943 440,0994

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