Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 375, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Sep 7, 2001, 8:55 PM CDT for Tulsa County, Oklahoma. It was in force for 35 min. 2 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, 8:55 PM CDT (01:55 UTC)
- Expired
- Sep 7, 2001, 9:30 PM CDT
- In force
- 35 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Tulsa County, OK
The radar
The Tulsa radar (KINX), 34 km from the middle of the area, began a volume at 01:48 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, 9:13 PM CDT | Hail 0.75 | Tulsa, OK | Dime size hail fell near the intersection of the Broken Arrow expressway and Highway 169. |
| Sep 7, 9:22 PM CDT | Hail 0.75 | Tulsa, OK | Dime size hail fell near the intersection of Highway 169 and 91st street. |
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
Lamont, OK (KLMN), launched 00:00Z, 1.9 hours before the alert went out and 152 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
- 263 J/kg
- Mixed-layer CIN
- -214 J/kg
- Mixed-layer LCL
- 1305 m above ground
- 0-6 km bulk shear
- 64 kt
- 0-1 km storm-relative helicity
- -133 m²/s²
- 0-3 km storm-relative helicity
- -52 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
The text
As transmitted, in the capitals the NWS used until 2016.
965 WUUS54 KTSA 080155 SVRTUL OKC143-080230- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 855 PM CDT FRI SEP 7 2001 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... TULSA COUNTY IN NORTHEAST OKLAHOMA * UNTIL 930 PM CDT * AT 853 PM CDT...DOPPLER RADAR INDICATED THE LEADING EDGE OF A LINE OF SEVERE THUNDERSTORMS FROM 11 MILES NORTHEAST OF TULSA TO 6 MILES SOUTH OF GLENPOOL...MOVING EAST AT 20 MPH. * SOME LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE...BROKEN ARROW...GLENPOOL...JENKS...BIXBY AND TULSA. WIND GUSTS TO 60 MPH CAN BE EXPECTED IN THE WARNED AREA. THE DAMAGING WINDS WILL OCCUR OUT AHEAD OF THE HEAVY RAIN. MOVE TO A SAFE PLACE NOW. HAIL TO THE SIZE OF DIMES WILL ALSO BE POSSIBLE. A TORNADO WATCH IS ALSO IN EFFECT. TORNADOES CAN DEVELOP SUDDENLY FROM SEVERE THUNDERSTORMS. BE ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS. LAT...LON 3621 9600 3588 9605 3588 9581 3622 9576
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, 1 hour 48 minutes earlier.
Area forecast discussion, Sep 7, 7:07 PM CDT, 1 hour 48 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, 8:05 PM CDT, 50 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, 43 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, 25 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, 23 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.Local storm report, Sep 7, 8:44 PM CDT, 11 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
844 PM CDT FRI SEP 07 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0815 PM 2 ENE COPAN OK 61 MPH TSTM GUST
09/07/01 WASHINGTON MESONET REPORTLocal storm report, Sep 7, 8:53 PM CDT, 2 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
853 PM CDT FRI SEP 07 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0826 PM 6 W PADEN OK 60 MPH TSTM GUST
09/07/01 OKFUSKEE REPORTED BY EMERGENCY
MANAGEMENT.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, 8:57 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.