Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 388, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Sep 7, 2001, 10:54 PM CDT for Cherokee County, Sequoyah County, Wagoner County, Oklahoma. It was in force for 66 min. 5 reports came from inside the area while it was in force.
The area
The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.
The facts
- Issued
- Sep 7, 2001, 10:54 PM CDT (03:54 UTC)
- Expired
- Sep 8, 2001, 12:00 AM CDT
- In force
- 66 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Cherokee County, OK, Sequoyah County, OK, Wagoner County, OK
The radar
The Tulsa radar (KINX), 54 km from the middle of the area, began a volume at 04:12 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 7, 11:05 PM CDT | Hail 0.75 | Okay, OK | |
| Sep 7, 11:20 PM CDT | Thunderstorm Wind 52 M | Tahlequah, OK | |
| Sep 7, 11:20 PM CDT | Thunderstorm Wind 52 E | Marble City, OK | Thunderstorm winds estimated at 60 miles an hour blew down large tree limbs. |
| Sep 7, 11:30 PM CDT | Thunderstorm Wind 52 E | Tahlequah, OK | Thunderstorm winds estimated at 60 miles an hour blew down large tree limbs. |
| Sep 7, 11:44 PM CDT | Thunderstorm Wind 52 E | Vian, OK |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Sep 7, 7:00 PM CDT | Tornado Watch | SPC | 5 hr |
| Sep 7, 10:30 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Springfield, MO (KSGF), launched 00:00Z, 3.9 hours before the alert went out and 175 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
- 932 J/kg
- Mixed-layer CIN
- -149 J/kg
- Mixed-layer LCL
- 2014 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 83 m²/s²
- 0-3 km storm-relative helicity
- 178 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
The text
As transmitted, in the capitals the NWS used until 2016.
931
WUUS54 KTSA 080354
SVRTUL
OKC021-135-145-080500-
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
1054 PM CDT FRI SEP 7 2001
THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR
CHEROKEE COUNTY IN EAST CENTRAL OKLAHOMA
WESTERN SEQUOYAH COUNTY IN EAST CENTRAL OKLAHOMA
EASTERN WAGONER COUNTY IN NORTHEAST OKLAHOMA
* UNTIL MIDNIGHT CDT
* AT 1054 PM CDT SEVERE THUNDERSTORMS CAPABLE OF PRODUCING WINDS UP
TO 80 MPH WERE LOCATED ALONG A LINE EXTENDING FROM 6 MILES
SOUTHWEST OF TULLAHASSEE TO 17 MILES WEST OF COOKSON TO 20 MILES
SOUTHWEST OF VIAN...MOVING NORTHEAST AT 50 MPH.
* SOME LOCATIONS AFFECTED INCLUDE... OKAY...TULLAHASSEE...WAGONER...
SCRAPER...PEGGS...ELDON...HULBERT...COOKSON...TAHLEQUAH...MARBLE
CITY...VIAN AND SALLISAW.
IN ADDITION TO DAMAGING WINDS...LARGE HAIL IS ALSO LIKELY WITH THESE
STORMS.
LAT...LON 3581 9555 3581 9513 3545 9510 3541 9481
3617 9482 3608 9535What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Tulsa, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 7, 7:07 PM CDT, 3 hours 47 minutes earlier.
Area forecast discussion, Sep 7, 7:07 PM CDT, 3 hours 47 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 707 PM CDT FRI SEP 7 2001 WILL UPDATE FOR NEW TORNADO WATCH NUMBER 720 IN EFFECT UNTIL MIDNIGHT. MESONET WINDS AND 3 HOURLY PRESSURE FALLS SUGGEST THAT TORNADO THREAT SHUD REMAIN N OF I-40. PRIMARY SEVERE WEATHER THREAT...HOWEVER...WILL BE LARGE HAIL AND DAMAGING WINDS. ALSO PUSHED OFF POPS FOR FAR SE OK AND NW AR UNTIL AFTER MIDNIGHT. UPDATE OUT AROUND 715 PM. FCSTID = 18 .TSA... AR...NONE. OK...TORNADO WATCH UNTIL MIDNIGHT CDT SATURDAY FOR ZONES OKZ054>068...OKZ070>071...OKZ073.
In the hours before
Special weather statement, Sep 7, 8:57 PM CDT, 1 hour 57 minutes before
OKZ054-055-059-080230- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TULSA OK 857 PM CDT FRI SEP 7 2001 TORNADO WATCH NUMBER 720 HAS BEEN CANCELLED FOR PAWNEE...OSAGE AND WASHINGTON COUNTIES IN NORTHEAST OKLAHOMA. THUNDERSTORMS WERE MOVING OUT OF THESE COUNTIES AND THREAT OF SEVERE WEATHER IS OVER.
Local storm report, Sep 7, 9:12 PM CDT, 1 hour 42 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
912 PM CDT FRI SEP 07 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0810 PM SHAMROCK OK 70 MPH TSTM GUST
09/07/01 CREEK SPOTTER REPORT.
0810 PM SHAMROCK OK .75 INCH HAIL
09/07/01 CREEK SPOTTER REPORT.Special weather statement, Sep 7, 9:13 PM CDT, 1 hour 41 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-081200- EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 913 PM CDT FRI SEP 7 2001 ...UPDATE FOR TORNADO WATCH NUMBER 720... .DISCUSSION... AT 9PM THE LOW-LEVEL INSTABILITY AXIS EXTENDED FROM NEAR JOPLIN TO MCALESTER. THE LINE OF THUNDERSTORMS WILL CONTINUE SEVERE AS IT CROSSES THIS AXIS...BUT SHOULD BEGIN TO WEAKEN AS IT MOVES PAST THE THE GREATEST INSTABILITY AND AS THE ASSOCIATED UPPER-LEVEL SYSTEM WEAKENS AND ACCELERATES NORTHEAST AWAY FROM THE REGION. THE THREAT FOR SEVERE WEATHER IN WESTERN ARKANSAS AND FAR SOUTHEAST OKLAHOMA WILL BE LIMITED IF THE STORMS WEAKEN AS EXPECTED. SEE SHORT TERM FORECASTS FOR THE LATEST PROJECTIONS ON THIS LINE OF SEVERE STORMS.
Local storm report, Sep 7, 9:37 PM CDT, 1 hour 17 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
937 PM CDT FRI SEP 07 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0935 PM MAZIE OK 65 MPH TSTM GUST
09/07/01 MAYES SPOTTER REPORT.Special weather statement, Sep 7, 10:06 PM CDT, 48 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TULSA OK 1006 PM CDT FRI SEP 7 2001 OKZ057-058-062-063-065>068-070-071-073-080400- CHEROKEE-CRAIG-DELAWARE-MAYES-MCINTOSH-MUSKOGEE-OKFUSKEE-OKMULGEE- OTTAWA-PITTSBURG-WAGONER- 1006 PM CDT FRI SEP 7 2001 TORNADO WATCH NUMBER 720 REMAINS IN EFFECT UNTIL MIDNIGHT FOR THE FOLLOWING OKLAHOMA COUNTIES... CHEROKEE...CRAIG...DELAWARE...MAYES...MCINTOSH...MUSKOGEE... OKFUSKEE...OKMULGEE...OTTAWA...PITTSBURG AND WAGONER COUNTIES. THE LINE OF THUNDERSTORMS WILL CONTINUE SEVERE FOR THE NEXT COUPLE OF HOURS AS IT MOVES ACROSS PARTS OF EASTERN OKLAHOMA. OKZ056-060-061-064-080400- CREEK-NOWATA-ROGERS-TULSA- 1006 PM CDT FRI SEP 7 2001 TORNADO WATCH NUMBER 720 HAS BEEN CANCELED IN CREEK...NOWATA... ROGERS AND TULSA COUNTIES. THE LINE OF SEVERE STORMS HAS MOVED OUT OF THESE COUNTIES AND THE THREAT FOR SEVERE WEATHER HAS ENDED.
Special weather statement, Sep 7, 10:13 PM CDT, 41 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-080515- EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 1013 PM CDT FRI SEP 7 2001 ...UPDATE FOR TORNADO WATCH NUMBER 720... TORNADO WATCH NUMBER 720 FOR PARTS OF EASTERN OKLAHOMA WILL BE REPLACED BY A SEVERE THUNDERSTORM WATCH THAT WILL COVER PARTS OF EASTERN OKLAHOMA AND MUCH NORTHWEST ARKANSAS. .DISCUSSION... THE LINE OF THUNDERSTORMS MOVING ACROSS EASTERN OKLAHOMA WILL CONTINUE SEVERE THROUGH MIDNIGHT WITH SOME WEAKENING LIKELY THEREAFTER. HOWEVER THE POTENTIAL FOR STRONG WINDS MAY CONTINUE INTO THE OVERNIGHT HOURS AND A SEVERE THUNDERSTORM WATCH WILL BE ISSUED SOON FOR MUCH OF EASTERN OKLAHOMA AND NORTHWEST ARKANSAS.
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 7, 7:27 PM CDT | Severe Thunderstorm Warning | TSA | Creek | 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, 7:59 PM CDT | Severe Thunderstorm Warning | TSA | Nowata | 61 min |
| Sep 7, 8:03 PM CDT | Severe Thunderstorm Warning | TSA | Creek, Tulsa | 57 min |
| Sep 7, 8:03 PM CDT | Severe Thunderstorm Warning | TSA | Rogers | 57 min |
| Sep 7, 8:10 PM CDT | Severe Thunderstorm Warning | TSA | Okfuskee | 50 min |
| Sep 7, 8:22 PM CDT | Severe Thunderstorm Warning | TSA | Craig | 38 min |
| Sep 7, 8:39 PM CDT | Severe Thunderstorm Warning | TSA | Okmulgee, Wagoner | 51 min |
| Sep 7, 8:55 PM CDT | Severe Thunderstorm Warning | TSA | Tulsa | 35 min |
| Sep 7, 8:57 PM CDT | Severe Thunderstorm Warning | TSA | Craig, Mayes, Rogers | 63 min |
| Sep 7, 8:57 PM CDT | Severe Thunderstorm Warning | TSA | Ottawa | 63 min |
| Sep 7, 8:57 PM CDT | Severe Thunderstorm Warning | TSA | Okfuskee | 33 min |
| Sep 7, 9:13 PM CDT | Severe Thunderstorm Warning | TSA | McIntosh, Muskogee | 62 min |
| Sep 7, 9:13 PM CDT | Severe Thunderstorm Warning | TSA | Wagoner | 62 min |
| Sep 7, 9:39 PM CDT | Severe Thunderstorm Warning | TSA | Okfuskee | 66 min |
| Sep 7, 9:40 PM CDT | Severe Thunderstorm Warning | TSA | Delaware | 65 min |
| Sep 7, 9:41 PM CDT | Severe Thunderstorm Warning | TSA | Cherokee | 64 min |
| Sep 7, 10:11 PM CDT | Severe Thunderstorm Warning | TSA | McIntosh, Muskogee, Okmulgee | 64 min |
| Sep 7, 10:14 PM CDT | Severe Thunderstorm Warning | TSA | Adair | 61 min |
| Sep 7, 10:30 PM CDT | Severe Thunderstorm Warning | TSA | Pittsburg | 60 min |
| Sep 7, 10:39 PM CDT | Severe Thunderstorm Warning | TSA | Haskell | 66 min |
| Sep 7, 10:59 PM CDT | Severe Thunderstorm Warning | TSA | Pittsburg | 46 min |
| Sep 7, 11:13 PM CDT | Severe Thunderstorm Warning | TSA | McIntosh | 47 min |
| Sep 7, 11:24 PM CDT | Severe Thunderstorm Warning | TSA | Adair | 51 min |
| Sep 7, 11:31 PM CDT | Severe Thunderstorm Warning | TSA | Latimer, Pushmataha | 59 min |
| Sep 7, 11:42 PM CDT | Severe Thunderstorm Warning | TSA | Haskell, LeFlore, Sequoyah | 63 min |
| Sep 8, 12:19 AM CDT | Severe Thunderstorm Warning | TSA | Choctaw, Pushmataha | 56 min |
| Sep 8, 1:15 AM CDT | Severe Thunderstorm Warning | TSA | LeFlore | 60 min |
| Sep 8, 3:41 PM CDT | Severe Thunderstorm Warning | TSA | Haskell, Latimer | 64 min |
| Sep 8, 3:50 PM CDT | Severe Thunderstorm Warning | TSA | Pittsburg | 55 min |
| Sep 8, 4:45 PM CDT | Severe Thunderstorm Warning | TSA | Latimer | 60 min |
| Sep 8, 5:18 PM CDT | Severe Thunderstorm Warning | TSA | Pushmataha | 57 min |
| Sep 8, 5:30 PM CDT | Severe Thunderstorm Warning | TSA | LeFlore | 60 min |
| Sep 8, 6:09 PM CDT | Severe Thunderstorm Warning | TSA | Latimer | 66 min |
| Sep 8, 6:14 PM CDT | Flash Flood Warning | TSA | Latimer | 3 hr |
| Sep 8, 6:30 PM CDT | Severe Thunderstorm Warning | TSA | LeFlore | 60 min |
| Sep 8, 6:43 PM CDT | Severe Thunderstorm Warning | TSA | Pushmataha | 62 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 2001Every severe thunderstorm warning 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.