Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 374, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Sep 7, 2001, 8:39 PM CDT for Okmulgee County, Wagoner County, Oklahoma. It was in force for 51 min. 3 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, 8:39 PM CDT (01:39 UTC)
- Expired
- Sep 7, 2001, 9:30 PM CDT
- In force
- 51 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Okmulgee County, OK, Wagoner County, OK
The radar
The Tulsa radar (KINX), 39 km from the middle of the area, began a volume at 01:43 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, 9:10 PM CDT | Thunderstorm Wind 61 E | Beggs, OK | |
| Sep 7, 9:15 PM CDT | Thunderstorm Wind 61 E | Coweta, OK | Thunderstorm winds estimated at 70 miles an hour blew trees down. |
| Sep 7, 9:35 PM CDT | Thunderstorm Wind 57 E | Mazie, 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 |
The nearest sounding before it
Norman, OK (KOUN), launched 00:00Z, 1.7 hours before the alert went out and 165 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
- 3154 J/kg
- Mixed-layer CIN
- -21 J/kg
- Mixed-layer LCL
- 1262 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 156 m²/s²
- 0-3 km storm-relative helicity
- 166 m²/s²
- Significant tornado parameter
- 2.3
- Supercell composite
- 17.3
The text
As transmitted, in the capitals the NWS used until 2016.
840
WUUS54 KTSA 080139
SVRTUL
OKC111-145-080230-
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
839 PM CDT FRI SEP 7 2001
THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR
OKMULGEE COUNTY IN NORTHEAST OKLAHOMA
WAGONER COUNTY IN NORTHEAST OKLAHOMA
* UNTIL 930 PM CDT
* AT 837 PM CDT SEVERE THUNDERSTORMS CAPABLE OF PRODUCING WINDS UP TO
70 MPH WERE LOCATED ALONG A LINE EXTENDING FROM 17 MILES
NORTHWEST OF ONETA TO 9 MILES NORTHWEST OF BEGGS TO 15 MILES WEST
OF BEGGS...MOVING EAST AT 30 MPH.
* SOME LOCATIONS AFFECTED INCLUDE... ONETA...COWETA...STONEBLUFF...
OKAY...PORTER...WAGONER...BALD HILL...BEGGS...PRESTON...MORRIS...
SCHULTER...GRAYSON...DEWAR...HENRYETTA AND OKMULGEE.
THE DAMAGING WINDS WILL OCCUR OUT AHEAD OF THE HEAVY RAIN AND HAIL.
MOVE TO A SAFE PLACE NOW.
IN ADDITION TO DAMAGING WINDS...LARGE HAIL IS ALSO LIKELY WITH THESE
STORMS.
A TORNADO WATCH IS ALSO IN EFFECT. TORNADOES CAN DEVELOP SUDDENLY
FROM SEVERE THUNDERSTORMS. BE ALERT FOR RAPIDLY CHANGING WEATHER
CONDITIONS.
LAT...LON 3619 9580 3589 9578 3584 9617 3541 9611
3543 9589 3584 9573 3585 9525 3609 9529What 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, 1 hour 32 minutes earlier.
Area forecast discussion, Sep 7, 7:07 PM CDT, 1 hour 32 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
Local storm report, Sep 7, 7:44 PM CDT, 55 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
744 PM CDT FRI SEP 7 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0710 PM 8 SE FORAKER OK 60 MPH TSTM GUST
09/07/01 OSAGE MESONET REPORT.Local storm report, Sep 7, 8:05 PM CDT, 34 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
805 PM CDT FRI SEP 07 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0745 PM 2S WYNONA OK 75 MPH WIND GUST
09/07/01 OSAGE OBSERVED BY MESONET.Local storm report, Sep 7, 8:05 PM CDT, 34 minutes before
PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE TULSA OK
805 PM CDT FRI SEP 07 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0745 PM 2 S WYNONA OK 73 MPH WIND GUST
09/07/01 OSAGE OBSERVED BY MESONET.Local storm report, Sep 7, 8:12 PM CDT, 27 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
812 PM CDT FRI SEP 07 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0710 PM 2 S WYNONA OK 73 MPH TSTM GUST
09/07/01 OSAGE MESONET REPORT.Local storm report, Sep 7, 8:30 PM CDT, 9 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
830 PM CDT FRI SEP 07 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0750 PM DRUMRIGHT OK 60 MPH TSTM GUST
09/07/01 CREEK SPOTTER REPORT.
0800 PM BARTLESVILLE OK 70 MPH TSTM GUST
09/07/01 WASHINGTON REPORTED BY OKLAHOMA
HIGHWAY PATROL.Local storm report, Sep 7, 8:32 PM CDT, 7 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
832 PM CDT FRI SEP 7 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0750 PM DRUMRIGHT OK 60 MPH TSTM GUST
09/07/01 CREEK SPOTTER REPORT.
0800 PM BARTLESVILLE OK 70 MPH TSTM GUST
09/07/01 WASHINGTON REPORTED BY OKLAHOMA
HIGHWAY PATROL.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, 8:55 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, 10:54 PM CDT | Severe Thunderstorm Warning | TSA | Cherokee, Sequoyah, Wagoner | 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.