Alert archive / Oklahoma / Tornado Watches in 2001

Tornado Watch 715

September 7, 200111 counties in Kansas; 21 counties in Oklahoma

The Storm Prediction Center issued this tornado watch at Sep 7, 2001, 3:15 PM CDT for 11 counties in Kansas; 21 counties in Oklahoma. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Sep 7, 2001, 3:15 PM CDT (20:15 UTC)
Expired
Sep 7, 2001, 9:00 PM CDT
In force
6 hr
Issued by
the Storm Prediction Center
All 32 counties

Butler County, KS, Chautauqua County, KS, Cowley County, KS, Elk County, KS, Greenwood County, KS, Harper County, KS, Harvey County, KS, Kingman County, KS, Reno County, KS, Sedgwick County, KS, Sumner County, KS, Alfalfa County, OK, Blaine County, OK, Caddo County, OK, Canadian County, OK, Cleveland County, OK, Garfield County, OK, Grady County, OK, Grant County, OK, Kay County, OK, Kingfisher County, OK, Kiowa County, OK, Lincoln County, OK, Logan County, OK, Major County, OK, McClain County, OK, Noble County, OK, Oklahoma County, OK, Osage County, OK, Pawnee County, OK, Payne County, OK, Pottawatomie County, OK

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Sep 7, 3:56 PM CDTSevere Thunderstorm WarningICTHarvey, Sedgwick49 min
Sep 7, 3:56 PM CDTSevere Thunderstorm WarningOUNGarfield, Grant49 min
Sep 7, 4:00 PM CDTSevere Thunderstorm WarningOUNBlaine, Major45 min
Sep 7, 4:12 PM CDTSevere Thunderstorm WarningOUNBlaine48 min
Sep 7, 4:25 PM CDTSevere Thunderstorm WarningICTSumner65 min
Sep 7, 4:27 PM CDTSevere Thunderstorm WarningOUNGarfield, Kingfisher48 min
Sep 7, 4:32 PM CDTSevere Thunderstorm WarningICTReno28 min
Sep 7, 4:42 PM CDTSevere Thunderstorm WarningOUNGrant, Kay48 min
Sep 7, 4:59 PM CDTSevere Thunderstorm WarningICTHarvey, Reno61 min
Sep 7, 5:10 PM CDTSevere Thunderstorm WarningICTCowley65 min
Sep 7, 5:11 PM CDTSevere Thunderstorm WarningOUNGarfield, Logan, Noble64 min
Sep 7, 5:11 PM CDTSevere Thunderstorm WarningOUNCanadian, Kingfisher64 min
Sep 7, 5:24 PM CDTSevere Thunderstorm WarningOUNKay51 min
Sep 7, 5:43 PM CDTSevere Thunderstorm WarningICTButler62 min
Sep 7, 5:43 PM CDTSevere Thunderstorm WarningTSAOsage62 min
Sep 7, 5:48 PM CDTSevere Thunderstorm WarningICTSedgwick, Sumner57 min
Sep 7, 5:54 PM CDTSevere Thunderstorm WarningICTHarvey66 min
Sep 7, 5:56 PM CDTSevere Thunderstorm WarningICTElk, Greenwood64 min
Sep 7, 6:01 PM CDTSevere Thunderstorm WarningOUNLogan, Noble, Payne44 min
Sep 7, 6:13 PM CDTSevere Thunderstorm WarningICTCowley47 min
Sep 7, 6:13 PM CDTSevere Thunderstorm WarningOUNCanadian, Kingfisher, Oklahoma47 min
Sep 7, 6:13 PM CDTSevere Thunderstorm WarningTSAPawnee47 min
Sep 7, 6:19 PM CDTSevere Thunderstorm WarningOUNKay21 min
Sep 7, 6:42 PM CDTSevere Thunderstorm WarningICTChautauqua63 min
Sep 7, 6:43 PM CDTSevere Thunderstorm WarningOUNLincoln, Logan, Noble, Payne47 min
Sep 7, 6:43 PM CDTSevere Thunderstorm WarningTSAOsage, Pawnee62 min
Sep 7, 6:49 PM CDTSevere Thunderstorm WarningOUNCanadian, Cleveland, Comanche, Grady, McClain41 min
Sep 7, 6:49 PM CDTSevere Thunderstorm WarningOUNOklahoma41 min
Sep 7, 7:19 PM CDTSevere Thunderstorm WarningOUNPayne41 min
Sep 7, 7:23 PM CDTSevere Thunderstorm WarningOUNLincoln, Oklahoma67 min
Sep 7, 7:27 PM CDTSevere Thunderstorm WarningOUNCleveland, Grady, McClain63 min
Sep 7, 7:38 PM CDTSevere Thunderstorm WarningTSAOsage, Washington52 min
Sep 7, 7:38 PM CDTSevere Thunderstorm WarningTSAPawnee52 min
Sep 7, 7:58 PM CDTSevere Thunderstorm WarningOUNPottawatomie47 min
Sep 7, 8:26 PM CDTSevere Thunderstorm WarningOUNCleveland, McClain34 min
Sep 7, 8:30 PM CDTSevere Thunderstorm WarningOUNLincoln30 min
Sep 7, 8:44 PM CDTSevere Thunderstorm WarningOUNPottawatomie, Seminole61 min
Sep 7, 9:00 PM CDTSevere Thunderstorm WarningOUNMcClain30 min

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 8.3 hours before the alert went out and 115 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-pSkew-T log-p diagram, Norman, OK at 12:00Z on 2001-09-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1886 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Norman, OK at 12:00Z on 2001-09-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 345 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
1886 J/kg
Mixed-layer CIN
-225 J/kg
Mixed-layer LCL
610 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
345 m²/s²
0-3 km storm-relative helicity
307 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.6

Open this sounding in Storm Lab

The text

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

667 
WWUS9 KMKC 072000
SEL5  
MKC WW 071955
KSZ000-OKZ000-080200-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 715
STORM PREDICTION CENTER NORMAN OK
255 PM CDT FRI SEP 7 2001

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

SOUTH CENTRAL KANSAS                             
NORTHERN AND CENTRAL OKLAHOMA                           

EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 315 PM UNTIL 900
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 65 STATUTE MILES EAST AND WEST
OF A LINE FROM 40 MILES SOUTH SOUTHWEST OF OKLAHOMA CITY OKLAHOMA
TO 40 MILES EAST NORTHEAST OF HUTCHINSON KANSAS.

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 713...WW 714...

DISCUSSION...SEVERE STORMS ARE EXPECTED TO DEVELOP RAPIDLY ALONG
THE DRYLINE ACROSS S CENTRAL KS/NW OK IN THE NEXT HOUR...AND
INCREASE IN COVERAGE AS THE COLD FRONT OVERTAKES THE DRYLINE THIS
AREA.  FARTHER S...STORMS MAY DEVELOP INTO W CENTRAL/CENTRAL OK IN
1-2 HOURS AS THE CAP WEAKENS.  BACKING LOW-LEVEL WINDS WITH TIME
AND INCREASING MID LEVEL FLOW...COMBINED WITH STRONG INSTABILITY...
WILL SUPPORT SUPERCELLS WITH VERY LARGE HAIL AND POSSIBLY
TORNADOES.  LATER THIS AFTERNOON/EVENING...STORMS WILL LIKELY
EVOLVE INTO A SQUALL LINE WITH HAIL AND DAMAGING WINDS.


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 500. 
MEAN STORM MOTION VECTOR 24030.


...THOMPSON

381,0955 345,0964 345,0990 381,0982

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 7, 1:30 AM CDTSevere Thunderstorm WatchSPCCloud, Jewell, Mitchell, Osborne, Phillips, Republic and 2 more6 hr
Sep 7, 2:00 PM CDTSevere Thunderstorm WatchSPCAtchison, Brown, Chase, Clay, Dickinson, Doniphan and 18 more6 hr
Sep 7, 4:45 PM CDTSevere Thunderstorm WatchSPCClay, Cloud, Dickinson, Ellis, Ellsworth, Geary and 15 more3 hr
Sep 7, 6:00 PM CDTTornado WatchSPCAtchison, Brown, Chase, Doniphan, Douglas, Franklin and 16 more5 hr

Nearby

Tornado Watches in Oklahoma, 2001Tornado Watches in Kansas, 2001Every tornado watch in 2001

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.