Tornado Watch 415

Issued

Jun 14, 2009, 7:46 PM CDT (00:46 UTC)

Expired

Jun 15, 2009, 1:06 AM CDT

In force

5 hr

Issued by

the Storm Prediction Center

Largest hail expected

2.5 in

Strongest gust expected

60 kt

The North Platte radar (KLNX), 138 km from the middle of the area, began a volume at 00:49 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

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

40%

One or more hailstones of 2 inches or more

30%

Six or more combined severe hail and wind reports

80%

• Mesoscale Discussion 1121Jun 14, 5:48 PM CDT
• Mesoscale Discussion 1124Jun 14, 7:17 PM CDT
• Mesoscale Discussion 1126Jun 14, 10:36 PM CDT
• Mesoscale Discussion 1127Jun 14, 11:36 PM CDT

683 
WWUS20 KWNS 150049
SEL5  
SPC WW 150049
KSZ000-NEZ000-SDZ000-150800-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 415
NWS STORM PREDICTION CENTER NORMAN OK
645 PM MDT SUN JUN 14 2009

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

       WESTERN KANSAS
       WESTERN NEBRASKA
       SOUTHWEST SOUTH DAKOTA

EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 645 PM UNTIL
200 AM MDT.

TORNADOES...HAIL TO 2.5 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 60 STATUTE
MILES EAST AND WEST OF A LINE FROM 50 MILES NORTH NORTHEAST OF
RAPID CITY SOUTH DAKOTA TO 65 MILES SOUTHEAST OF GOODLAND KANSAS.
 FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU5).

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 407...WW 409...WW
410...WW 411...WW 412...WW 413...WW 414...

DISCUSSION...SCTD SUSTAINED STORMS/SUPERCELLS EXPECTED TO
PERSIST/DEVELOP OVER WW THROUGH LATE TONIGHT.  TWO MAIN FOCUS AREAS
EXPECTED ARE /1/ NW KS AND SW NEB...ON NRN FRINGE OF 45-50 KT WSWLY
MID LVL FLOW ASSOCIATED WITH CO UPR IMPULSE...AND /2/ SW SD...IN
AREA OF ENHANCED SELY LOW LVL FLOW SE OF ERN MT/WY LEE TROUGH.  SVR
HAIL...DMGG WIND...AND DEPENDING ON STORM MODE...TORNADOES MAY
OCCUR.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
550. MEAN STORM MOTION VECTOR 26030.


...CORFIDI

Tornado Watches in Nebraska, 2009Tornado Watches in Kansas, 2009Tornado Watches in South Dakota, 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.