Tornado Watch 304

Issued

May 29, 2007, 12:29 PM MDT (18:29 UTC)

Expired

May 29, 2007, 8:00 PM MDT

In force

8 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

The Denver radar (KFTG), 135 km from the middle of the area, began a volume at 18:32 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

50%

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

50%

One or more hailstones of 2 inches or more

30%

Six or more combined severe hail and wind reports

70%

• Mesoscale Discussion 918May 29, 12:12 PM MDT
• Mesoscale Discussion 919May 29, 2:52 PM MDT
• Mesoscale Discussion 920May 29, 4:34 PM MDT
• Mesoscale Discussion 921May 29, 5:40 PM MDT

000
WWUS20 KWNS 291831
SEL4  
SPC WW 291831
COZ000-KSZ000-NEZ000-300200-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 304
NWS STORM PREDICTION CENTER NORMAN OK
1230 PM MDT TUE MAY 29 2007

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

       NORTHEAST COLORADO
       NORTHWEST KANSAS
       SOUTHWEST NEBRASKA

EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 1230 PM UNTIL
800 PM MDT.

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 55 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 10 MILES NORTHWEST OF DENVER
COLORADO TO 25 MILES EAST NORTHEAST OF MCCOOK NEBRASKA.  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.

DISCUSSION...STRONG/ISOLATED SEVERE STORMS CONTINUE TO
DEVELOP/INTENSITY OVER PARTS OF SWRN NEB AND ALONG THE FRONT RANGE
IN CO.  ACTIVITY IS ASSOCIATED WITH COLD FRONTAL BOUNDARY THAT WILL
MOVE SWD/SEWD THIS AFTERNOON INTO MODERATELY UNSTABLE AIR MASS. 
MLCAPE IS 2000-2500 J/KG OVER SWRN NEB ATTM...AND BETWEEN 500-1500
J/KG OVER ERN CO.  DEEP LAYER SHEAR IS 40-45 KT WHICH IS FAVORABLE
FOR STRONG ROTATING UPDRAFTS AND THE POSSIBILITY OF ISOLATED
TORNADOES.

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
450. MEAN STORM MOTION VECTOR 23030.


...MCCARTHY

Tornado Watches in Colorado, 2007Tornado Watches in Nebraska, 2007Tornado Watches in Kansas, 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.