Tornado Watch 769

Issued

Sep 15, 2006, 7:06 PM CDT (00:06 UTC)

Expired

Sep 16, 2006, 1:00 AM CDT

In force

6 hr

Issued by

the Storm Prediction Center

Largest hail expected

2.5 in

Strongest gust expected

60 kt

Counties Butler County, NE, Clay County, NE, Colfax County, NE, Cuming County, NE, Dodge County, NE, Fillmore County, NE, Hamilton County, NE, Lancaster County, NE, Merrick County, NE, Nance County, NE, Platte County, NE, Polk County, NE, Saline County, NE, Saunders County, NE, Seward County, NE, Stanton County, NE, Thurston County, NE, York County, NE

The Omaha radar (KOAX), 103 km from the middle of the area, began a volume at 00:06 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

50%

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

70%

• Mesoscale Discussion 1966Sep 15, 5:56 PM CDT

000 
WWUS20 KWNS 160007
SEL9  
SPC WW 160007
NEZ000-160600-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 769
NWS STORM PREDICTION CENTER NORMAN OK
705 PM CDT FRI SEP 15 2006

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

       SOUTHEAST AND EAST CENTRAL NEBRASKA

EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 705 PM
UNTIL 100 AM 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 45 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 5 MILES SOUTH SOUTHWEST OF
GRAND ISLAND NEBRASKA TO 45 MILES NORTH NORTHEAST OF LINCOLN
NEBRASKA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).

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 766...WW 767...WW 768...

DISCUSSION...SRN END OF EXISTING CONVECTIVE CLUSTER IN CNTRL NEB
WILL EXPERIENCE INTENSIFYING LOW LEVEL SPEED AND DIRECTIONAL
SHEAR...AND REDUCED TEMP-DEWPOINT SPREADS THIS EVENING AS BOUNDARY
LAYER COOLS AND LLJ STRENGTHENS.  GIVEN EXISTING SEMI-DISCRETE
STORMS AND POTENTIAL FOR ADDITIONAL DISCRETE UPDRAFTS...THREAT MAY
INCREASE FOR TORNADOES.

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
500. MEAN STORM MOTION VECTOR 22035.


...CORFIDI

Tornado 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.