Tornado Watch 131

Issued

Apr 19, 2003, 1:15 PM CDT (18:15 UTC)

Expired

Apr 19, 2003, 8:00 PM CDT

In force

7 hr

Issued by

the Storm Prediction Center

The Vance AFB radar (KVNX), 50 km from the middle of the area, began a volume at 18:17 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 501Apr 19, 1:10 PM CDT
• Mesoscale Discussion 502Apr 19, 2:02 PM CDT
• Mesoscale Discussion 503Apr 19, 3:15 PM CDT
• Mesoscale Discussion 505Apr 19, 5:50 PM CDT
• Mesoscale Discussion 506Apr 19, 6:07 PM CDT

000 
WWUS20 KWNS 191818
SEL1
SPC WW 191815
KSZ000-OKZ000-200100-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 131
STORM PREDICTION CENTER NORMAN OK
115 PM CDT SAT APR 19 2003

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

SOUTHERN KANSAS                             
NORTHWEST AND NORTH CENTRAL OKLAHOMA                           

EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 115 PM UNTIL 800
PM CDT.

TORNADOES...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 ALONG AND 80 STATUTE MILES NORTH AND
SOUTH OF A LINE FROM 15 MILES NORTHWEST OF GAGE OKLAHOMA TO 25
MILES SOUTHEAST OF PONCA CITY OKLAHOMA.

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.


DISCUSSION...THE LOW LEVELS CONTINUE TO DESTABILIZE OVER NW OK/SRN
KS...AND SEVERE STORMS WILL DEVELOP IN THE NEXT 1-2 HOURS ACROSS NW
OK/SW KS NEAR AN EWD MOVING SURFACE LOW.  VERY STEEP LOW-MID LEVEL
LAPSE RATES WILL CONTRIBUTE TO CAPE VALUES OF 1500-2000 J/KG AND
LIFTED INDICES BELOW -12 C.  THE COMBINATION OF VERTICAL SHEAR AND
INSTABILITY WILL BE FAVORABLE FOR SUPERCELLS...WHILE THE TORNADO
THREAT WILL BE ENHANCED BY THE VERY STEEP LAPSE RATES AND THE
POTENTIAL FOR STRONG LOW-LEVEL STRETCHING THIS AFTERNOON.


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 450. 
MEAN STORM MOTION VECTOR 25030.


...THOMPSON

373,0995 373,0964 351,0964 351,0995

Tornado Watches in Oklahoma, 2003Tornado Watches in Kansas, 2003Every tornado watch in 2003

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.