Alert archive / Oklahoma / Tornado Warnings in 1991
Tornado Warning 20, NWS Tulsa, OK
NWS Tulsa, OK issued this tornado warning at Jul 12, 1991, 8:03 PM CDT for Mayes County, Oklahoma. It was in force for 27 min.
The area
The counties it named.
The facts
- Issued
- Jul 12, 1991, 8:03 PM CDT (01:03 UTC)
- Expired
- Jul 12, 1991, 8:30 PM CDT
- In force
- 27 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties
County Mayes County, OK
The nearest sounding before it
Springfield, MO (KUMN), launched 00:00Z, 1.1 hours before the alert went out and 144 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
- 632 J/kg
- Mixed-layer CIN
- -140 J/kg
- Mixed-layer LCL
- 1149 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 56 m²/s²
- 0-3 km storm-relative helicity
- 129 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KTUL 130104 TORTUL OKC097-130130- BULLETIN - EBS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE TULSA OK 803 PM CDT FRI JUL 12 1991 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 830 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES ... IN NORTHEAST OKLAHOMA ...NORTHERN MAYES COUNTY AT 8 PM A TORNADO WAS SIGHTED BY A STATE TROOPER 2 MILES WEST AND 1 MILE NORTH OF ADAIR. MOVEMENT WAS EAST AT 10 MILES AN 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. REPORT ANY SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY AND ASK THEM TO RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE. KEEP TUUNED TO THIS STATION FOR THE LATEST WEATHER BULLETINS.
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, Jul 12, 6:52 PM CDT, 1 hour 11 minutes before
OKZ026>031-130100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TULSA OK 650 PM CDT FRI JUL 12 1991 ...THUNDERSTORMS INCREASING IN NORTHEAST OKLAHOMA... AT 645 PM NATIONAL WEATHER SERVICE RADAR AT TULSA SHOWED A SCATTERED LINE OF SHOWERS AND THUNDERSTORMS EXTENDING FROM JUST NORTH OF NOWATA TO BARNSDALL TO FAIRFAX. THE STORMS ARE MOVING SOUTH SOUTHEAST AT 35 MILES AN HOUR AND WILL BE APPROACHING VINITA...TULSA...AND SAPULPA BY AROUND 730 PM. THE MAIN THREAT FROM THESE THUNDERSTORMS APPEARS TO BE WIND GUSTS TO BETWEEN 30 AND 40 MILES AN HOUR. RADAR CURRENTLY INDICATES MOST RAINFALL TO BE OF LIGHT TO MODERATE INTENSITY. A COUPLE OF THUNDERSTORMS WERE ALSO DEVELOPING IN NORTHEAST ROGERS COUNTY NEAR CHELSEA. THESE STORMS APPEARED MORE CAPABLE OF PRODUCING VERY HEAVY RAIN AND POSSIBLE SMALL HAIL. MOVEMENT OF THESE STORMS HAS NOT BEEN DETERMINED. STAY TUNED TO THIS STATION FOR THE LATEST WEATHER INFORMATION FROM THE NATIONAL WEATHER SERVICE.
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 12, 7:25 PM CDT | Severe Thunderstorm Warning | TSA | Mayes | 50 min |
| Jul 13, 3:22 PM CDT | Severe Thunderstorm Warning | TSA | LeFlore | 68 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; the sounding from the Mesonet's radiosonde archive.