Tornado Watch 154

Issued

Apr 6, 2006, 12:43 PM CDT (17:43 UTC)

Expired

Apr 6, 2006, 9:00 PM CDT

In force

8 hr

Issued by

the Storm Prediction Center

The Grand Island radar (KUEX), 95 km from the middle of the area, began a volume at 17:46 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.

• Mesoscale Discussion 438Apr 6, 12:12 PM CDT
• Mesoscale Discussion 445Apr 6, 4:53 PM CDT
• Mesoscale Discussion 449Apr 6, 8:29 PM CDT

000 
WWUS20 KWNS 061744
SEL4  
SPC WW 061744
KSZ000-NEZ000-070200-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 154
NWS STORM PREDICTION CENTER NORMAN OK
1245 PM CDT THU APR 6 2006

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

       CENTRAL AND EASTERN KANSAS
       SOUTH CENTRAL AND SOUTHEAST NEBRASKA

EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 1245 PM UNTIL
900 PM CDT.

...THIS IS A PARTICULARLY DANGEROUS SITUATION...

DESTRUCTIVE TORNADOES...LARGE 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 20 MILES WEST NORTHWEST OF
COLUMBUS NEBRASKA TO 60 MILES SOUTHEAST OF WICHITA KANSAS.  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 153...

DISCUSSION...RAPID DESTABILIZATION IS OCCURRING ACROSS CENTRAL KS
WHERE STRONG SURFACE HEATING AND MOISTURE ADVECTION IS ONGOING.  THE
CAP IS RAPIDLY WEAKENING ACROSS THIS AREA...AND STRONG SURFACE
PRESSURE FALLS ARE UNDERWAY ACROSS CENTRAL KS...DOWNSTREAM FROM A
STRONG MID LEVEL WAVE APPROACHING THIS AREA FROM THE W.  THE
ENVIRONMENT WILL BECOME MORE FAVORABLE FOR STORM DEVELOPMENT THROUGH
THE AFTERNOON...WITH BOTH DISCRETE SUPERCELLS AND BOWING LINE
SEGMENTS POSSIBLE THROUGH THE LATE AFTERNOON HOURS.  THE MORE
DISCRETE STORMS WILL HAVE THE POTENTIAL TO PRODUCE A FEW STRONG
TORNADOES AND VERY LARGE HAIL...WHILE HAIL AND DAMAGING WINDS WILL
BE LIKELY WITH ALL OF THE CONVECTION.  ADDITIONALLY...THE TORNADO
THREAT WILL EXTEND WELL N INTO NEB WHERE LOW-LEVEL SHEAR WILL BE
FOCUSED NEAR A SURFACE LOW AND SURFACE FRONTAL BOUNDARY.

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
500. MEAN STORM MOTION VECTOR 21045.


...THOMPSON

Tornado Watches in Kansas, 2006Tornado Watches in Nebraska, 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; radar from the NEXRAD Level II archive.