Alert archive / Kansas / Severe Thunderstorm Watches in 2002

Severe Thunderstorm Watch 548

July 28, 200220 counties in Kansas; 11 counties in Oklahoma

The Storm Prediction Center issued this severe thunderstorm watch at Jul 28, 2002, 7:45 PM CDT for 20 counties in Kansas; 11 counties in Oklahoma. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: Jul 28, 2002, 7:45 PM CDT (00:45 UTC)
Expired: Jul 29, 2002, 1:00 AM CDT
In force: 5 hr
Issued by: the Storm Prediction Center

All 31 counties

Barber County, KS, Butler County, KS, Chase County, KS, Chautauqua County, KS, Coffey County, KS, Comanche County, KS, Cowley County, KS, Elk County, KS, Greenwood County, KS, Harper County, KS, Harvey County, KS, Kingman County, KS, Lyon County, KS, Marion County, KS, Osage County, KS, Sedgwick County, KS, Shawnee County, KS, Sumner County, KS, Wilson County, KS, Woodson County, KS, Alfalfa County, OK, Dewey County, OK, Ellis County, OK, Garfield County, OK, Grant County, OK, Harper County, OK, Kay County, OK, Major County, OK, Roger Mills County, OK, Woods County, OK, Woodward County, OK

The radar

The Vance AFB radar (KVNX), 48 km from the middle of the area, began a volume at 00:48 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.

Warnings issued inside it

7 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
Jul 28, 8:16 PM CDT	Severe Thunderstorm Warning	DDC	Comanche	44 min
Jul 28, 8:57 PM CDT	Severe Thunderstorm Warning	ICT	Harper	48 min
Jul 28, 9:02 PM CDT	Severe Thunderstorm Warning	DDC	Comanche	58 min
Jul 28, 9:21 PM CDT	Severe Thunderstorm Warning	OUN	Woods	39 min
Jul 28, 9:23 PM CDT	Severe Thunderstorm Warning	ICT	Sumner	67 min
Jul 28, 10:01 PM CDT	Severe Thunderstorm Warning	OUN	Harper, Woods	44 min
Jul 28, 10:20 PM CDT	Severe Thunderstorm Warning	OUN	Kay	40 min

The nearest sounding before it

Lamont, OK (KLMN), launched 00:00Z, 0.8 hours before the alert went out and 90 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 2257 J/kg
Mixed-layer CIN: -74 J/kg
Mixed-layer LCL: 1318 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 60 m²/s²
0-3 km storm-relative helicity: 153 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WWUS20 KWNS 290042
SEL8  
SPC WW 290045
KSZ000-OKZ000-290600-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 548
STORM PREDICTION CENTER NORMAN OK
745 PM CDT SUN JUL 28 2002

THE STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

   SOUTHERN AND EASTERN KANSAS                             
   NORTHWEST OKLAHOMA                           

EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 745 PM UNTIL
100 AM CDT.

HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 60 STATUTE MILES
NORTH AND SOUTH OF A LINE FROM 20 MILES SOUTHWEST OF GAGE OKLAHOMA
TO 35 MILES EAST OF EMPORIA KANSAS.

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR 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.  SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOES.

OTHER WATCH INFORMATION...  CONTINUE...WW 544...WW 545...WW
546...WW 547...

DISCUSSION...LARGE COLD POOL HAS DEVELOP CENTRAL KS AND IS DRIVING
LINE OF SEVERE THUNDERSTORMS S AND E INTO ERN KS AND NWRN OK.  WITH
VERY UNSTABLE AIR MASS AHEAD OF STORMS COUPLED WITH 30 KT SLY
LLJ...POTENTIAL FOR DAMAGING WINDS AND HAIL WILL SPREAD SEWD.


AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES.  EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70
KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 600.  MEAN STORM
MOTION VECTOR 28030.


...HALES

372,0953 351,1000 365,1000 391,0953

Nearby

Severe Thunderstorm Watches in Kansas, 2002 Severe Thunderstorm Watches in Oklahoma, 2002 Every severe thunderstorm watch in 2002

Sources

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.