Alert archive / Oklahoma / Tornado Warnings in 1991
Tornado Warning 4, NWS Tulsa, OK
NWS Tulsa, OK issued this tornado warning at Apr 26, 1991, 7:14 PM CDT for Osage County, Oklahoma. It was in force for 61 min. 2 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Apr 26, 1991, 7:14 PM CDT (00:14 UTC)
- Expired
- Apr 26, 1991, 8:15 PM CDT
- In force
- 61 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties
County Osage County, OK
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 26, 7:21 PM CDT | Tornado F4 | Osage, OK | |
| Apr 26, 7:31 PM CDT | Hail 2.75 | Osage, 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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Norman, OK (KOUN), launched 00:00Z, 0.2 hours before the alert went out and 181 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
- 4072 J/kg
- Mixed-layer CIN
- -9 J/kg
- Mixed-layer LCL
- 954 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 201 m²/s²
- 0-3 km storm-relative helicity
- 377 m²/s²
- Significant tornado parameter
- 7.9
- Supercell composite
- 34.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KTUL 270014 TORTUL OKC113-270115- BULLETIN - EBS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE TULSA OK 714 PM CDT FRI APR 26 1991 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 815 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES ... IN NORTHEAST OKLAHOMA ...OSAGE COUNTY AT 712 PM ... RADAR INDICATED A TORNADO 10 MILES NORTHEAST OF MARLAND ALONG THE ARKANSAS RIVER MOVING NORTHEAST AT 30 MILES AN HOUR. WITH THE PRESENT MOVEMENT AND SPEED OF THIS TORNADO... IT WILL PASS NEAR KAW CITY AND BURBAND WITHIN THE NEXT HOUR. THIS IS A DANGEROUS STORM SITUATION. ACT QUICKLY. IF YOU ARE IN THE PATH OF THIS TORNADO MOVE TO A SHELTER BELOW GROUND IF AVAILABLE. OTHERWISE...GO TO A SMALL INTERIOR ROOM ON THE LOWEST FLOOR POSSIBLE. STAY AWAY FROM OUTSIDE WALLS AND AVOID WINDOWS. ABANDON CARS AND MOBILE HOMES FOR A REINFORCED BUILDING OR GET IN A GROUND DEPRESSION.
What forecasters said that day
The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Apr 26, 5:42 PM CDT, 1 hour 32 minutes before
OKZ026-030-262345- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TULSA OK 542 PM CDT FRI APR 26 1991 ...TORNADO WATCH REMAINS IN EFFECT FOR OSAGE...PAWNEE...AND CREEK COUNTIES UNTIL 900 PM... AT 530 PM...A BAND OF STRONG THUNDERSTORMS CONTINUE ACROSS PARTS OF NORTH CENTRAL OKLAHOMA. SOME OF THESE STORMS HAVE BECOME SEVERE. HOWEVER CONSIDERING ITS CURRENT MOVEMENT...IT APPEARS THE STRONGEST STORMS WILL MOVE NORTHEASTWARD INTO KANSAS. HOWEVER...OTHER STORMS MAY DEVELOP FARTHER SOUTH ALONG THE BAND LATER THIS EVENING...AND MAY AFFECT THE COUNTIES IN THE WATCH AREA (OSAGE...PAWNEE...AND CREEK). PEOPLE IN THE WATCH AREA SHOULD CONTINUE TO BE ALERT AND TO MONITOR NOAA WEATHER RADIO FOR FURTHER STATEMENTS AND POSSIBLE WARNINGS.
Special weather statement, Apr 26, 6:35 PM CDT, 39 minutes before
OKZ026-030-270030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TULSA OK 635 PM CDT FRI APR 26 1991 ...TORNADO WATCH REMAINS IN EFFECT FOR OSAGE...PAWNEE...AND CREEK COUNTIES UNTIL 900 PM.. AT 630 PM...AN AREA OF STRONG THUNDERSTORMS CONTINUE ACROSS NORTH CENTRAL OKLAHOMA. THE STRONGEST STORMS CONTINUE BETWEEN ENID AND PONCA CITY. HOWEVER...A NEW AREA OF STORMS HAS DEVELOPED TO THE EAST OVER OSAGE AND PAWNEE COUNTIES. ALTHOUGH THESE STORMS ARE NOT AS STRONG AS THE ONES TO THE WEST...THEY COULD INTENSIFY QUICKLY. PEOPLE IN OSAGE AND PAWNEE COUNTIES SHOULD REMAIN ALERT AND CONTINUE TO MONITOR NOAA WEATHER RADIO AND OTHER SOURCES FOR POSSIBLE WARNINGS AND FURTHER STATEMENTS.R
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 26, 7:46 PM CDT | Tornado Warning | TSA | Pawnee | 59 min |
| Apr 26, 8:15 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 60 min |
| Apr 26, 8:32 PM CDT | Tornado Warning | TSA | Osage | 58 min |
| Apr 26, 8:46 PM CDT | Severe Thunderstorm Warning | TSA | Washington | 44 min |
| Apr 26, 9:15 PM CDT | Tornado Warning | TSA | Tulsa, Washington | 60 min |
| Apr 26, 9:39 PM CDT | Severe Thunderstorm Warning | TSA | Nowata, Rogers | 66 min |
| Apr 26, 9:44 PM CDT | Tornado Warning | TSA | Rogers | 46 min |
| Apr 26, 10:16 PM CDT | Severe Thunderstorm Warning | TSA | Osage, Pawnee | 59 min |
| Apr 26, 10:36 PM CDT | Severe Thunderstorm Warning | TSA | Craig | 69 min |
| Apr 26, 10:49 PM CDT | Tornado Warning | TSA | Craig | 56 min |
| Apr 26, 11:03 PM CDT | Severe Thunderstorm Warning | TSA | Latimer | 57 min |
| Apr 26, 11:06 PM CDT | Severe Thunderstorm Warning | TSA | LeFlore | 69 min |
| Apr 26, 11:09 PM CDT | Tornado Warning | TSA | Ottawa | 51 min |
| Apr 26, 11:18 PM CDT | Severe Thunderstorm Warning | TSA | Creek, Osage, Tulsa, Washington | 57 min |
| Apr 26, 11:18 PM CDT | Severe Thunderstorm Warning | TSA | Nowata | 57 min |
| Apr 26, 11:38 PM CDT | Tornado Warning | TSA | LeFlore | 67 min |
| Apr 26, 11:49 PM CDT | Severe Thunderstorm Warning | TSA | Okfuskee | 41 min |
| Apr 26, 11:58 PM CDT | Severe Thunderstorm Warning | TSA | Rogers | 47 min |
| Apr 27, 12:25 AM CDT | Tornado Warning | TSA | Craig, Mayes | 35 min |
Nearby
Tornado Warnings in Oklahoma, 1991Every tornado warning in 1991Tornadoes in 1991
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.