Tornado Watch 356

Issued

Jun 6, 2007, 8:49 PM CDT (01:49 UTC)

Expired

Jun 7, 2007, 4:00 AM CDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

1.5 in

Strongest gust expected

60 kt

The Aberdeen radar (KABR), 71 km from the middle of the area, began a volume at 01:48 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

30%

One or more EF2 to EF5 tornadoes

20%

Ten or more severe wind reports

60%

One or more gusts of 65 knots or more

30%

Ten or more severe hail reports

40%

One or more hailstones of 2 inches or more

20%

Six or more combined severe hail and wind reports

90%

• Mesoscale Discussion 1027Jun 6, 6:09 PM CDT
• Mesoscale Discussion 1029Jun 6, 6:56 PM CDT
• Mesoscale Discussion 1030Jun 6, 8:29 PM CDT
• Mesoscale Discussion 1032Jun 6, 11:30 PM CDT
• Mesoscale Discussion 1034Jun 7, 3:05 AM CDT
• Mesoscale Discussion 1035Jun 7, 3:36 AM CDT

000
WWUS20 KWNS 070155
SEL6  
SPC WW 070155
MNZ000-NDZ000-SDZ000-070900-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 356
NWS STORM PREDICTION CENTER NORMAN OK
850 PM CDT WED JUN 6 2007

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

       WESTERN MINNESOTA
       EASTERN NORTH DAKOTA
       NORTHEAST SOUTH DAKOTA

EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 850 PM
UNTIL 400 AM CDT.

TORNADOES...HAIL TO 1.5 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 80 STATUTE
MILES EAST AND WEST OF A LINE FROM 40 MILES SOUTHWEST OF
WATERTOWN SOUTH DAKOTA TO 65 MILES NORTH OF FARGO NORTH DAKOTA. 
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU6).

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 353...WW 354...WW 355...

DISCUSSION...SQLN WITH EMBEDDED SUSTAINED STORMS/POSSIBLE SUPERCELLS
NOW OVER N CNTRL SD EXPECTED TO CONTINUE NE INTO WW AREA...WITH AN
ATTENDANT THREAT FOR HIGH WIND/HAIL AND POSSIBLY A TORNADO.  OTHERS
STORMS MAY MOVE INTO SRN PART OF WW FROM ACTIVITY NOW FORMING INVOF
DRY LINE/OUTFLOW BOUNDARY INTERSECTION IN N CNTRL/NE NEB.  IN
ADDITION  ...STORMS MAY FORM OVER NRN PART OF WW AS STRENGTHENING
LLJ ENHANCES WAA INVOF DIFFUSE WARM FRONT.  BACKED LOW LEVEL FLOW NE
OF SEASONABLY STRONG NRN SD SFC LOW...STRENGTH OF WIND FIELD/FORCING
DOWNSTREAM FROM APPROACHING RCKYS UPR TROUGH...AND DEGREE OF
INSTABILITY SUGGEST POTENTIAL FOR SOME LOW LEVEL STORM
ROTATION...DESPITE LIKELY QUASI-LINEAR DOMINANT CONVECTIVE MODE.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 24030.


...CORFIDI

Tornado Watches in Minnesota, 2007Tornado Watches in North Dakota, 2007Tornado Watches in South Dakota, 2007Every tornado watch in 2007

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.