Tornado Watch 484

Issued

Jun 14, 2006, 5:14 PM MDT (23:14 UTC)

Expired

Jun 15, 2006, 1:00 AM MDT

In force

8 hr

Issued by

the Storm Prediction Center

Largest hail expected

3 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

50%

One or more gusts of 65 knots or more

30%

Ten or more severe hail reports

60%

One or more hailstones of 2 inches or more

40%

Six or more combined severe hail and wind reports

90%

• Mesoscale Discussion 1184Jun 14, 2:32 PM MDT
• Mesoscale Discussion 1187Jun 14, 4:47 PM MDT
• Mesoscale Discussion 1189Jun 14, 8:57 PM MDT
• Mesoscale Discussion 1190Jun 14, 11:48 PM MDT

000 
WWUS20 KWNS 142318
SEL4  
SPC WW 142318
MTZ000-NDZ000-SDZ000-150700-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 484
NWS STORM PREDICTION CENTER NORMAN OK
515 PM MDT WED JUN 14 2006

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

       EASTERN MONTANA
       WESTERN NORTH DAKOTA
       WESTERN AND CENTRAL SOUTH DAKOTA

EFFECTIVE THIS WEDNESDAY AFTERNOON AND THURSDAY MORNING FROM 515
PM UNTIL 100 AM MDT.

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 85 STATUTE
MILES EAST AND WEST OF A LINE FROM 40 MILES WEST NORTHWEST OF
SIDNEY MONTANA TO 75 MILES WEST OF PIERRE SOUTH DAKOTA.  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 482...SEVERE THUNDERSTORM WATCH NUMBER
483. WATCH NUMBER 482 483 WILL NOT BE IN EFFECT AFTER 515 PM MDT.
CONTINUE...WW 480...

DISCUSSION...SUPERCELLS NOW IN SE MT AND W CNTRL SD EXPECTED TO BE
JOINED BY ADDITIONAL STORMS FORMING LATER THIS EVENING IN ZONE OF
LOW LEVEL WARM ADVECTION AND INCREASING DEEP ASCENT DOWNSTREAM FROM
STRONG WRN WY UPR IMPULSE.  BACKED LOW LEVEL FLOW AND LOWERED LCLS
INVOF STALLED FRONT NOW EXTENDING FROM NEAR MLS ESE INTO SE SD MAY
ENHANCE POTENTIAL FOR LOW LEVEL ROTATION/POSSIBLE TORNADOES AS
STORMS CROSS THE BOUNDARY.  WITH TIME...ACTIVITY SHOULD MERGE INTO A
LARGE CLUSTER...WITH EMBEDDED CELLS CONTINUING TO PRODUCE VERY LARGE
HAIL/HIGH WIND.

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
550. MEAN STORM MOTION VECTOR 23030.


...CORFIDI

Tornado Watches in North Dakota, 2006Tornado Watches in South Dakota, 2006Tornado Watches in Montana, 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.