Alert archive / Oklahoma / Tornado Watches in 2001
Tornado Watch 715
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.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 7, 3:56 PM CDT | Severe Thunderstorm Warning | ICT | Harvey, Sedgwick | 49 min |
| Sep 7, 3:56 PM CDT | Severe Thunderstorm Warning | OUN | Garfield, Grant | 49 min |
| Sep 7, 4:00 PM CDT | Severe Thunderstorm Warning | OUN | Blaine, Major | 45 min |
| Sep 7, 4:12 PM CDT | Severe Thunderstorm Warning | OUN | Blaine | 48 min |
| Sep 7, 4:25 PM CDT | Severe Thunderstorm Warning | ICT | Sumner | 65 min |
| Sep 7, 4:27 PM CDT | Severe Thunderstorm Warning | OUN | Garfield, Kingfisher | 48 min |
| Sep 7, 4:32 PM CDT | Severe Thunderstorm Warning | ICT | Reno | 28 min |
| Sep 7, 4:42 PM CDT | Severe Thunderstorm Warning | OUN | Grant, Kay | 48 min |
| Sep 7, 4:59 PM CDT | Severe Thunderstorm Warning | ICT | Harvey, Reno | 61 min |
| Sep 7, 5:10 PM CDT | Severe Thunderstorm Warning | ICT | Cowley | 65 min |
| Sep 7, 5:11 PM CDT | Severe Thunderstorm Warning | OUN | Garfield, Logan, Noble | 64 min |
| Sep 7, 5:11 PM CDT | Severe Thunderstorm Warning | OUN | Canadian, Kingfisher | 64 min |
| Sep 7, 5:24 PM CDT | Severe Thunderstorm Warning | OUN | Kay | 51 min |
| Sep 7, 5:43 PM CDT | Severe Thunderstorm Warning | ICT | Butler | 62 min |
| Sep 7, 5:43 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 62 min |
| Sep 7, 5:48 PM CDT | Severe Thunderstorm Warning | ICT | Sedgwick, Sumner | 57 min |
| Sep 7, 5:54 PM CDT | Severe Thunderstorm Warning | ICT | Harvey | 66 min |
| Sep 7, 5:56 PM CDT | Severe Thunderstorm Warning | ICT | Elk, Greenwood | 64 min |
| Sep 7, 6:01 PM CDT | Severe Thunderstorm Warning | OUN | Logan, Noble, Payne | 44 min |
| Sep 7, 6:13 PM CDT | Severe Thunderstorm Warning | ICT | Cowley | 47 min |
| Sep 7, 6:13 PM CDT | Severe Thunderstorm Warning | OUN | Canadian, Kingfisher, Oklahoma | 47 min |
| Sep 7, 6:13 PM CDT | Severe Thunderstorm Warning | TSA | Pawnee | 47 min |
| Sep 7, 6:19 PM CDT | Severe Thunderstorm Warning | OUN | Kay | 21 min |
| Sep 7, 6:42 PM CDT | Severe Thunderstorm Warning | ICT | Chautauqua | 63 min |
| Sep 7, 6:43 PM CDT | Severe Thunderstorm Warning | OUN | Lincoln, Logan, Noble, Payne | 47 min |
| Sep 7, 6:43 PM CDT | Severe Thunderstorm Warning | TSA | Osage, Pawnee | 62 min |
| Sep 7, 6:49 PM CDT | Severe Thunderstorm Warning | OUN | Canadian, Cleveland, Comanche, Grady, McClain | 41 min |
| Sep 7, 6:49 PM CDT | Severe Thunderstorm Warning | OUN | Oklahoma | 41 min |
| Sep 7, 7:19 PM CDT | Severe Thunderstorm Warning | OUN | Payne | 41 min |
| Sep 7, 7:23 PM CDT | Severe Thunderstorm Warning | OUN | Lincoln, Oklahoma | 67 min |
| Sep 7, 7:27 PM CDT | Severe Thunderstorm Warning | OUN | Cleveland, Grady, McClain | 63 min |
| Sep 7, 7:38 PM CDT | Severe Thunderstorm Warning | TSA | Osage, Washington | 52 min |
| Sep 7, 7:38 PM CDT | Severe Thunderstorm Warning | TSA | Pawnee | 52 min |
| Sep 7, 7:58 PM CDT | Severe Thunderstorm Warning | OUN | Pottawatomie | 47 min |
| Sep 7, 8:26 PM CDT | Severe Thunderstorm Warning | OUN | Cleveland, McClain | 34 min |
| Sep 7, 8:30 PM CDT | Severe Thunderstorm Warning | OUN | Lincoln | 30 min |
| Sep 7, 8:44 PM CDT | Severe Thunderstorm Warning | OUN | Pottawatomie, Seminole | 61 min |
| Sep 7, 9:00 PM CDT | Severe Thunderstorm Warning | OUN | McClain | 30 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.
- 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
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.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 7, 1:30 AM CDT | Severe Thunderstorm Watch | SPC | Cloud, Jewell, Mitchell, Osborne, Phillips, Republic and 2 more | 6 hr |
| Sep 7, 2:00 PM CDT | Severe Thunderstorm Watch | SPC | Atchison, Brown, Chase, Clay, Dickinson, Doniphan and 18 more | 6 hr |
| Sep 7, 4:45 PM CDT | Severe Thunderstorm Watch | SPC | Clay, Cloud, Dickinson, Ellis, Ellsworth, Geary and 15 more | 3 hr |
| Sep 7, 6:00 PM CDT | Tornado Watch | SPC | Atchison, Brown, Chase, Doniphan, Douglas, Franklin and 16 more | 5 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.