Tornado Watch 166

Issued

Apr 14, 2012, 12:00 PM CDT (17:00 UTC)

Expired

Apr 14, 2012, 7:00 PM CDT

In force

7 hr

Issued by

the Storm Prediction Center

Particularly dangerous situation

Yes

Largest hail expected

4 in

Strongest gust expected

60 kt

The Grand Island radar (KUEX), 114 km from the middle of the area, began a volume at 16:59 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

80%

One or more EF2 to EF5 tornadoes

80%

Ten or more severe wind reports

70%

One or more gusts of 65 knots or more

60%

Ten or more severe hail reports

90%

One or more hailstones of 2 inches or more

80%

Six or more combined severe hail and wind reports

95%

• Mesoscale Discussion 522Apr 14, 11:27 AM CDT
• Mesoscale Discussion 526Apr 14, 1:41 PM CDT
• Mesoscale Discussion 528Apr 14, 2:15 PM CDT
• Mesoscale Discussion 532Apr 14, 4:47 PM CDT
• Mesoscale Discussion 534Apr 14, 6:57 PM CDT

068 
WWUS20 KWNS 141659
SEL6
SPC WW 141659
NEZ000-150000-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 166
NWS STORM PREDICTION CENTER NORMAN OK
1200 PM CDT SAT APR 14 2012

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

       CENTRAL AND EASTERN NEBRASKA

EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM NOON UNTIL 700
PM CDT.

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

DESTRUCTIVE TORNADOES...LARGE HAIL TO 4 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 25 MILES SOUTH SOUTHWEST OF
BROKEN BOW NEBRASKA TO 10 MILES SOUTH OF OMAHA NEBRASKA.  FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU6).

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 165...

DISCUSSION...A CLUSTER OF SEVERE THUNDERSTORMS OVER CENTRAL KS IS
EXPECTED TO CONTINUE TO TRACK NORTHEASTWARD AND INTO CENTRAL/EASTERN
NEB THIS AFTERNOON.  MEANWHILE...STRONG LOW LEVEL WARM/MOIST
ADVECTION AND A WEAK CAP MAY RESULT IN OTHER CONVECTIVE DEVELOPMENT
ACROSS THE WATCH AREA DURING THE NEXT FEW HOURS.  LOW LEVEL VERTICAL
SHEAR IS VERY IMPRESSIVE THROUGH THE AFTERNOON/EVENING...SUGGESTING
AND INCREASING RISK OF SURFACE-BASED SUPERCELLS CAPABLE OF STRONG
TORNADOES AND VERY LARGE HAIL.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 4 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 25035.


...HART

Tornado Watches in Nebraska, 2012Tornado Watches in Iowa, 2012Every tornado watch in 2012

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.