Tornado Watch 424

Issued

Jun 15, 2009, 2:34 PM MDT (20:34 UTC)

Expired

Jun 15, 2009, 11:00 PM MDT

In force

8 hr

Issued by

the Storm Prediction Center

Largest hail expected

4 in

Strongest gust expected

70 kt

The Goodland radar (KGLD), 122 km from the middle of the area, began a volume at 20:34 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

70%

One or more gusts of 65 knots or more

50%

Ten or more severe hail reports

90%

One or more hailstones of 2 inches or more

70%

Six or more combined severe hail and wind reports

95%

• Mesoscale Discussion 1136Jun 15, 1:57 PM MDT
• Mesoscale Discussion 1137Jun 15, 2:15 PM MDT
• Mesoscale Discussion 1145Jun 15, 5:19 PM MDT
• Mesoscale Discussion 1147Jun 15, 6:33 PM MDT
• Mesoscale Discussion 1149Jun 15, 8:32 PM MDT
• Mesoscale Discussion 1151Jun 15, 10:18 PM MDT

820 
WWUS20 KWNS 152036
SEL4  
SPC WW 152036
COZ000-KSZ000-NEZ000-160500-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 424
NWS STORM PREDICTION CENTER NORMAN OK
335 PM CDT MON JUN 15 2009

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

       PARTS OF EASTERN COLORADO
       PARTS OF NORTH AND WEST KANSAS
       LARGE PART OF SOUTHERN NEBRASKA

EFFECTIVE THIS MONDAY AFTERNOON FROM 335 PM UNTIL MIDNIGHT CDT.

TORNADOES...HAIL TO 4 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 80 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 70 MILES NORTHWEST OF LIMON
COLORADO TO 50 MILES EAST OF HASTINGS 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.

OTHER WATCH INFORMATION...CONTINUE...WW 419...WW 420...WW
421...WW 422...WW 423...

DISCUSSION...THUNDERSTORMS WILL INCREASE IN NUMBER AND INTENSITY EWD
ACROSS THE WATCH AREA AS THE AIRMASS HAS BECOME MDTLY UNSTABLE WITH 
50-60KT OF EFFECTIVE SHEAR.  SUPERCELLS ACCOMPANIED BY VERY LARGE
HAIL AND POSSIBLE TORNADOES WILL BECOME AN INCREASING THREAT THRU
THE EVENING.  STORMS EXPECTED TO DEVELOP INTO A FORWARD PROPAGATING
SEVERE MCS LATER THIS EVENING WITH INCREASING DAMAGING WIND THREAT.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 4 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
550. MEAN STORM MOTION VECTOR 26030.


...HALES

Tornado Watches in Nebraska, 2009Tornado Watches in Kansas, 2009Tornado Watches in Colorado, 2009Every tornado watch in 2009

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.