Alert archive / Oklahoma / Tornado Warnings in 1991
Tornado Warning 2, NWS Tulsa, OK
NWS Tulsa, OK issued this tornado warning at Mar 21, 1991, 7:07 PM CST for LeFlore County, Oklahoma. It was in force for 68 min. 3 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
- Mar 21, 1991, 7:07 PM CST (01:07 UTC)
- Expired
- Mar 21, 1991, 8:15 PM CST
- In force
- 68 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties
County LeFlore County, OK
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Mar 21, 7:25 PM CST | Tornado F1 | Le Flore, OK | |
| Mar 21, 7:30 PM CST | Hail 0.88 | Le Flore, OK | |
| Mar 21, 7:48 PM CST | Thunderstorm Wind 0 | Le Flore, 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
Springfield, MO (KUMN), launched 00:00Z, 1.1 hours before the alert went out and 237 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
- 1100 J/kg
- Mixed-layer CIN
- -20 J/kg
- Mixed-layer LCL
- 1075 m above ground
- 0-6 km bulk shear
- 64 kt
- 0-1 km storm-relative helicity
- 264 m²/s²
- 0-3 km storm-relative helicity
- 317 m²/s²
- Significant tornado parameter
- 1.9
- Supercell composite
- 6.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KFSM 220108 TORFSM OKC079-220145- BULLETIN - EBS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE FORT SMITH AR 707 PM CST THU MAR 21 1991 THE NATIONAL WEATHER SERVICE IN FORT SMITH HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 745 PM CST FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTHEAST OKLAHOMA ...SOUTHERN LE FLORE COUNTY AT 706 FT SMITH RADAR INDICATED A TORNADO 15 MILES WEST OF MUSE OKLAHOMA MOVING EAST NORTHEAST AT 40 MILES AN HOUR. ALSO DOPPLER RADAR OUT OF NORMAN OKLAHOMA INDICATED ROTATION IN THIS CELL. IF YOU ARE IN THE PATH OF A TORNADO...THE SAFEST PLACE IS A BASEMENT. GET UNDER A WORKBENCH OR PIECE OF STURDY FURNITURE. IF NO BASEMENT IS AVAILABLE...SEEK SHELTER IN AN INTERIOR ROOM SUCH AS A CLOSET ON THE LOWEST FLOOR. USE BLANKETS...PILLOWS... OR CUSHIONS TO COVER YOUR BODY. AVOID WINDOWS. THIS IS A DANGEROUS STORM SITUATION. ACT QUICKLY. IF YOU ARE IN THE PATH OF THIS TORNADO MOVE TO A SHELTEHR BELOW GROUND IF AVAILABLE. OTHERWISE...GO TO A SMALL INTERIOR ROOM ON THE LOWEST FLOOR POSSIBLE. AVOID WINDOWS. ABANDON CARS AND MOBILE HOMES FOR A REINFORCED BUILDING OR GET INTO A DITCH OR CULVERT.
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
Local storm report, Mar 21, 1:12 PM CST, 5 hours 55 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE TULSA, OK
111 PM CST THU MAR 21 1991
TIME/CST COUNTY EVENT
1230 PM CHEROKEE DIME SIZE HAIL FELL 8 MILES SOUTHEAST OF
PEGGS.Special weather statement, Mar 21, 1:41 PM CST, 5 hours 26 minutes before
OKZ026>034-040-221200- EASTERN OKLAHOMA THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 130 PM CST THU MAR 21 1991 ...TORNADO WATCH FOR ALL OF EASTERN OKLAHOMA UNTIL 7 PM... A MODERATE RISK OF SEVERE THUNDERSTORMS EXISTS OVER ALL OF EASTERN OKLAHOMA FOR THIS AFTERNOON AND EVENING. THUNDERSTORMS HAVE ALREADY REACHED SEVERE LEVELS IN EASTERN OKLAHOMA TODAY IN THE VERY MOIST AIR THAT COVERS MOST OF THE AREA. THE WESTERN EDGE OF THIS MOIST AIR IS MARKED BY A DRY LINE THAT EXTENDED FROM NEAR PONCA CITY TO ALTUS AT 130 PM. THIS DRY LINE WILL BE THE FOCUSING MECHANISM FOR SEVERE STORMS THAT WILL PRODUCE STRONG WINDS AND HAIL. WITH STRONG SURFACE WINDS FROM THE SOUTH AND STRONG SOUTHWEST WINDS ALOFT...TORNADOES ARE A DISTINCT POSSIBILITY WITH ANY SEVERE STORMS. SPOTTER NETWORKS AND EMERGENCY MANAGEMENT AGENCIES ARE URGED TO MAINTAIN A HIGH STATE OF READINESS THROUGH THIS EVENING. EVERYONE IN EASTERN OKLAHOMA SHOULD LISTEN TO zRADIO AND TV FOR THE LATEST INFORMATION AND BE READY TO SEEK SHELTER IMMEDIATELY.
Local storm report, Mar 21, 6:04 PM CST, 1 hour 3 minutes before
STORM REPORT NATIONAL WEATHER SERVICE TULSA, OK 552 PM CST THU MAR 21 1991 TIME/CST COUNTY EVENT 210 PM PITTSBURG ONE INCH SIZE HAIL 1 MILE WEST OF ARPELAR 210 PM CREEK QUARTER SIZE HAIL AT BRISTOW 220 PM OKFUSKEE 3/4 INCH SIZE HAIL 2 MILES SOUTH OF WELEEKA 228 PM CREEK 1 1/2 INCH SIZE HAIL AT KIEFER 230 PM OKMULGEE 3/4 INCH SIZE HAIL 2 MILES EAST OF HENRYETTA 240 PM PITTSBURG BASEBALL SIZE HAIL AT INDIANOLA 245 PM PITTSBURG GOLFBALL SIZE HAIL AT CANADIAN 250 PM TULSA DIME SIZE HAIL 3 MILES WEST BIXBY 255 PM MCINTOSH HAIL THE SIZE OF NICKLES FELL AT EUFAULA 255 PM TULSA DIME SIZE HAIL IN SOUTH TULSA 320 PM MUSKOGEE GOL:FBALL SIZE HAIL 2 MILES EAST OF WARNER 330 PM ROGERS 3/4 INCH SIZE HJAIL 2 MILES NORTH OF INOLA 355 PM CREEK DIME SIZE HAIL 5 MILES SOUTH BRISTOW 415 PM ADAIR DIME SIZE HAIL 6 MILES SOUTH STILWELL
Local storm report, Mar 21, 6:10 PM CST, 57 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE TULSA, OK
604 PM CST THU MAR 21 1991
TIME/CST COUNTY EVENT
430 PM MCINTOSH NICKLE SIZE TO QUARTER SIZE HAIL BROKE OUT
WINDOWS IN SEVERAL MOBLE HOMES 5 MILES NORTH
OF EUFAULA.
430 PM MCINTOSH QUARTER SIZE HAIL AT EUFAULA.
435 PM MUSKOGEE 1 INCH SIZE HAIL 3 MILES EAST OF FORT GIBSON
455 PM CHEROKEE HALF DOLLAR SIZE HAIL AT TAHLEQUAH
515 PM eADAIR DIME SIZE HAIL 2 MILES NORTH OF WATTS ON
HIGHWAY 59.The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 21, 6:57 PM CST | Severe Thunderstorm Warning | TSA | Haskell, Muskogee | 48 min |
| Mar 21, 7:09 PM CST | Tornado Warning | TSA | Haskell | 36 min |
| Mar 21, 7:33 PM CST | Severe Thunderstorm Warning | TSA | LeFlore, Sequoyah | 57 min |
| Mar 21, 7:44 PM CST | Severe Thunderstorm Warning | TSA | LeFlore | 61 min |
| Mar 21, 8:45 PM CST | Severe Thunderstorm Warning | TSA | LeFlore | 60 min |
| Mar 21, 11:36 PM CST | Severe Thunderstorm Warning | TSA | Pittsburg | 54 min |
| Mar 22, 12:20 AM CST | Severe Thunderstorm Warning | TSA | Sequoyah | 55 min |
| Mar 22, 1:12 AM CST | Severe Thunderstorm Warning | TSA | LeFlore | 63 min |
| Mar 22, 1:28 AM CST | Severe Thunderstorm Warning | TSA | Sequoyah | 32 min |
| Mar 22, 3:23 AM CST | Severe Thunderstorm Warning | TSA | Pittsburg | 52 min |
| Mar 22, 7:35 AM CST | Severe Thunderstorm Warning | TSA | Latimer | 40 min |
| Mar 22, 7:57 AM CST | Severe Thunderstorm Warning | TSA | Haskell | 48 min |
| Mar 22, 8:12 AM CST | Severe Thunderstorm Warning | TSA | LeFlore | 56 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.