Tornado Watch 744

Issued

Aug 24, 2006, 3:40 PM CDT (20:40 UTC)

Expired

Aug 24, 2006, 9:51 PM CDT

In force

6 hr

Issued by

the Storm Prediction Center

Largest hail expected

3 in

Strongest gust expected

60 kt

The Aberdeen radar (KABR), 107 km from the middle of the area, began a volume at 20:41 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.

Two or more tornadoes

40%

One or more EF2 to EF5 tornadoes

30%

Ten or more severe wind reports

50%

One or more gusts of 65 knots or more

50%

Ten or more severe hail reports

70%

One or more hailstones of 2 inches or more

50%

Six or more combined severe hail and wind reports

95%

• Mesoscale Discussion 1869Aug 24, 1:05 PM CDT
• Mesoscale Discussion 1872Aug 24, 2:57 PM CDT
• Mesoscale Discussion 1875Aug 24, 6:03 PM CDT

000 
WWUS20 KWNS 242038
SEL4  
SPC WW 242038
MNZ000-NDZ000-SDZ000-250400-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 744
NWS STORM PREDICTION CENTER NORMAN OK
335 PM CDT THU AUG 24 2006

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

       FAR W-CENTRAL MINNESOTA
       CENTRAL AND SOUTHEASTERN NORTH DAKOTA
       CENTRAL AND NORTHEASTERN SOUTH DAKOTA

EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 335 PM UNTIL
1100 PM CDT.

TORNADOES...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 APPROXIMATELY ALONG AND 100 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 40 MILES SOUTH SOUTHWEST OF
BISMARCK NORTH DAKOTA TO 45 MILES NORTHEAST OF ORTONVILLE
MINNESOTA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).

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 SEVERE
THUNDERSTORM WATCH NUMBER 742. WATCH NUMBER 742 WILL NOT BE IN
EFFECT AFTER 335 PM CDT. CONTINUE...WW 743...

DISCUSSION...RAPID SEVERE THUNDERSTORMS IN THE FORM OF SUPERCELLS
AND BROKEN LINES/BOW ECHOES WILL EVOLVE FROM WEST TO EAST ACROSS WW
THIS EVENING.  VERY UNSTABLE AIR MASS IS DEVELOPING OVER SD...WITH
STRONGEST ASCENT DRIVING SEVERE STORMS ACROSS CENTRAL ND.  LOW AND
DEEP LAYER SHEAR REMAIN QUITE STRONG ACROSS THE REGION...WITH
INCREASING SURFACE-BASED POTENTIAL DUE TO HEATING AND DEEP ASCENT
BOOSTING THE TORNADO THREAT.  VERY LARGE HAIL...DAMAGING WINDS AND
ISOLATED TORNADOES CAN BE EXPECTED.

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
500. MEAN STORM MOTION VECTOR 27030.


...EVANS

Tornado Watches in North Dakota, 2006Tornado Watches in South Dakota, 2006Tornado Watches in Minnesota, 2006Every tornado watch in 2006

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.