Tornado Watch 469

Issued

Jun 12, 2011, 5:28 PM MDT (23:28 UTC)

Expired

Jun 12, 2011, 11:51 PM MDT

In force

6 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

Two or more tornadoes

40%

One or more EF2 to EF5 tornadoes

20%

Ten or more severe wind reports

30%

One or more gusts of 65 knots or more

30%

Ten or more severe hail reports

50%

One or more hailstones of 2 inches or more

30%

Six or more combined severe hail and wind reports

80%

• Mesoscale Discussion 1198Jun 12, 5:07 PM MDT
• Mesoscale Discussion 1200Jun 12, 8:19 PM MDT

229 
WWUS20 KWNS 122325
SEL9
SPC WW 122325
NDZ000-130700-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 469
NWS STORM PREDICTION CENTER NORMAN OK
630 PM CDT SUN JUN 12 2011

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

       WESTERN AND CENTRAL NORTH DAKOTA

EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 630 PM UNTIL
200 AM CDT.

TORNADOES...HAIL TO 2 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 EAST AND WEST OF A LINE FROM 55 MILES NORTH NORTHWEST OF
MINOT NORTH DAKOTA TO 45 MILES EAST OF LEMMON SOUTH DAKOTA.  FOR
A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU9).

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 467...WW 468...

DISCUSSION...SCATTERED THUNDERSTORMS ARE LIKELY IN INCREASE IN
COVERAGE THIS EVENING ACROSS WESTERN ND AND SPREAD ACROSS THE WATCH
AREA.  FAVORABLE LOW LEVEL VERTICAL SHEAR AND APPROACHING MID LEVEL
SHORTWAVE TROUGH WILL PROMOTE A RISK OF SUPERCELLS...INCLUDING
ISOLATED TORNADOES.  OTHERWISE...LARGE HAIL AND DAMAGING WINDS WILL
BE POSSIBLE.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 25030.


...HART

Tornado Watches in North Dakota, 2011Every tornado watch in 2011

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.