Tornado Watch 175

Issued

Apr 15, 2012, 1:37 AM CDT (06:37 UTC)

Expired

Apr 15, 2012, 7:00 AM CDT

In force

5 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

The Wichita radar (KICT), 82 km from the middle of the area, began a volume at 06:41 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

50%

One or more EF2 to EF5 tornadoes

30%

Ten or more severe wind reports

40%

One or more gusts of 65 knots or more

30%

Ten or more severe hail reports

50%

One or more hailstones of 2 inches or more

30%

Six or more combined severe hail and wind reports

80%

• Mesoscale Discussion 540Apr 14, 10:37 PM CDT
• Mesoscale Discussion 542Apr 14, 11:48 PM CDT
• Mesoscale Discussion 544Apr 15, 4:32 AM CDT
• Mesoscale Discussion 545Apr 15, 6:35 AM CDT

437 
WWUS20 KWNS 150638
SEL5
SPC WW 150638
KSZ000-MOZ000-OKZ000-151100-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 175
NWS STORM PREDICTION CENTER NORMAN OK
135 AM CDT SUN APR 15 2012

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

       EASTERN KANSAS
       EXTREME NORTHWEST MISSOURI
       CENTRAL AND NORTH CENTRAL OKLAHOMA

EFFECTIVE THIS SUNDAY MORNING FROM 135 AM UNTIL 600 AM CDT.

TORNADOES...HAIL TO 2 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 50 STATUTE
MILES EAST AND WEST OF A LINE FROM 40 MILES NORTHEAST OF FALLS
CITY NEBRASKA TO 45 MILES SOUTH SOUTHEAST OF CLINTON OKLAHOMA.
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...THIS TORNADO WATCH REPLACES TORNADO
WATCH NUMBER 170. WATCH NUMBER 170 WILL NOT BE IN EFFECT AFTER
135 AM CDT. CONTINUE...WW 171...WW 173...WW 174...

DISCUSSION...BROKEN LINE OF STORMS ALONG THE DRYLINE/COLD FRONT WILL
CONTINUE TO SPREAD EWD THROUGH THE OVERNIGHT HOURS.  A STRONG
VERTICAL SHEAR ENVIRONMENT REMAINS IN PLACE WITH SURFACE-BASED
INSTABILITY E OF THE ONGOING STORMS...THUS A RISK OF
SUPERCELLS/TORNADOES IS EXPECTED TO PERSIST FOR ANOTHER FEW HOURS.
OTHERWISE...LARGE HAIL AND DAMAGING WINDS CAN BE EXPECTED WITH THE
STRONGER STORMS IN THE BAND.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 25045.


...THOMPSON

Tornado Watches in Oklahoma, 2012Tornado Watches in Kansas, 2012Tornado Watches in Missouri, 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.