Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 369, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Sep 7, 2001, 7:59 PM CDT for Nowata County, Oklahoma. It was in force for 61 min. 1 report 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, 7:59 PM CDT (00:59 UTC)
- Expired
- Sep 7, 2001, 9:00 PM CDT
- In force
- 61 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Nowata County, OK
The radar
The Tulsa radar (KINX), 74 km from the middle of the area, began a volume at 00:50 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, 8:10 PM CDT | Thunderstorm Wind 52 E | Wann, 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
Springfield, MO (KSGF), launched 00:00Z, 1.0 hours before the alert went out and 162 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.
957 WUUS54 KTSA 080100 SVRTUL OKC105-080200- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 759 PM CDT FRI SEP 7 2001 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NOWATA COUNTY IN NORTHEAST OKLAHOMA * UNTIL 900 PM CDT * AT 759 PM CDT...DOPPLER RADAR INDICATED SEVERE THUNDERSTORMS ALONG A LINE EXTENDING FROM 10 MILES NORTHEAST OF WANN TO 12 MILES SOUTHWEST OF WANN TO 16 MILES WEST OF WATOVA...MOVING NORTHEAST AT 60 MPH. A GUST OF 60 MPH WAS REPORTED AT 750 PM NEAR WANN. * SOME LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE...WATOVA... WANN...LENAPAH...DELAWARE AND NOWATA. HAIL TO THE SIZE OF QUARTERS AND WIND GUSTS TO 70 MPH CAN BE EXPECTED IN THE WARNED AREA. DAMAGING WINDS MAY OCCUR UP TO 5 MILES AHEAD OF THE HEAVY RAIN AND HAIL. MOVE TO A SAFE PLACE NOW. LAT...LON 3700 9542 3698 9583 3661 9581 3661 9562
What 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, 52 minutes earlier.
Area forecast discussion, Sep 7, 7:07 PM CDT, 52 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, 6:42 PM CDT, 1 hour 17 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
642 PM CDT FRI SEP 07 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0635 PM WEBB CITY OK 1 INCH HAIL
09/07/01 OSAGE QUARTER SIZE HAIL.
PUBLIC REPORT.Local storm report, Sep 7, 6:44 PM CDT, 1 hour 15 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
644 PM CDT FRI SEP 7 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0635 PM WEBB CITY OK 1 INCH HAIL
09/07/01 OSAGE QUARTER SIZE HAIL.
PUBLIC REPORT.Local storm report, Sep 7, 7:32 PM CDT, 27 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
732 PM CDT FRI SEP 07 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0645 PM 1 W SHIDLER OK .75 INCH HAIL
09/07/01 OSAGE DIME SIZE HAIL. PUBLIC
REPORT.
0720 PM 10 W CLEVELAND OK .75 INCH HAIL
09/07/01 PAWNEE DIME SIZE HAIL. SPOTTER
REPORT.
0720 PM 10 W CLEVELAND OK 65 MPH TSTM GUST
09/07/01 PAWNEE SPOTTER REPORT.Local storm report, Sep 7, 7:37 PM CDT, 22 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
737 PM CDT FRI SEP 07 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0735 PM HOMINY OK 70 MPH WIND GUST
09/07/01 OSAGE REPORTED BY HAM SPOTTER
0730 PM 5W HOMINY OK 1.75 INCH HAIL
09/07/01 OSAGE REPORTED BY PUBLICLocal storm report, Sep 7, 7:44 PM CDT, 15 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.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, 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, 10:54 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.