Tornado Watch 415

Issued

Jun 1, 2011, 4:45 PM CDT (21:45 UTC)

Expired

Jun 2, 2011, 12:00 AM CDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

2.5 in

Strongest gust expected

60 kt

The Grand Island radar (KUEX), 102 km from the middle of the area, began a volume at 21:48 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

40%

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

70%

• Mesoscale Discussion 1051Jun 1, 1:55 PM CDT
• Mesoscale Discussion 1055Jun 1, 4:26 PM CDT
• Mesoscale Discussion 1060Jun 1, 7:19 PM CDT
• Mesoscale Discussion 1064Jun 1, 11:25 PM CDT

189 
WWUS20 KWNS 012147
SEL5
SPC WW 012147
KSZ000-NEZ000-020500-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 415
NWS STORM PREDICTION CENTER NORMAN OK
450 PM CDT WED JUN 1 2011

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

       CENTRAL KANSAS
       WESTERN AND CENTRAL NEBRASKA

EFFECTIVE THIS WEDNESDAY AFTERNOON FROM 450 PM UNTIL MIDNIGHT CDT.

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 75 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 20 MILES WEST SOUTHWEST OF
NORTH PLATTE NEBRASKA TO 15 MILES EAST OF CONCORDIA 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 411...WW 412...WW
413...WW 414...

DISCUSSION...TSTMS SHOULD CONTINUE TO INTENSIFY THIS EVENING INVOF
WARM FRONT EXTENDING FROM WRN NEB INTO E-CNTRL KS.  HERE...AIR MASS
IS STRONGLY TO EXTREMELY UNSTABLE WITH MLCAPE VALUES OF 3500-4500
J/KG.  WHEN COUPLED WITH PRONOUNCED VEERING OF WINDS WITH
HEIGHT...SETUP WILL FAVOR THE DEVELOPMENT OF SUPERCELLS CAPABLE OF
VERY LARGE HAIL...A FEW TORNADOES...AND DAMAGING WIND GUSTS.

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 24015.


...MEAD

Tornado Watches in Kansas, 2011Tornado Watches in Nebraska, 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; radar from the NEXRAD Level II archive.