Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 521, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Jun 23, 1991, 4:41 PM CDT for McClain County, Oklahoma. It was in force for 54 min. 1 report 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
- Jun 23, 1991, 4:41 PM CDT (21:41 UTC)
- Expired
- Jun 23, 1991, 5:35 PM CDT
- In force
- 54 min
- Issued by
- NWS Norman, OK
- Area
- Whole counties
County McClain County, OK
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 23, 4:42 PM CDT | Thunderstorm Wind 52 | Mcclain, 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 12:00Z, 9.7 hours before the alert went out and 24 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
- 330 J/kg
- Mixed-layer CIN
- -238 J/kg
- Mixed-layer LCL
- 1199 m above ground
- 0-6 km bulk shear
- 5 kt
- 0-1 km storm-relative helicity
- -22 m²/s²
- 0-3 km storm-relative helicity
- 42 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KOKC 232144 SVROKC OKC027-087-133-232245- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE OKLAHOMA CITY OK 441 PM CDT SUN JUN 23 1991 THE NATIONAL WEATHER SERVICE IN OKLAHOMA CITY HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 545 PM CDT FOR THE FOLLOWING OKLAHOMA LOCATIONS... IN CENTRAL OKLAHOMA ...SOUTHERN CLEVELAND COUNTY...SOUTHERN MCCLAIN COUNTY ...SEMINOLE COUNTY AT 440 PM CDT RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS FROM 10 MILES NORTHWEST OF SEMINOLE TO MACOMB TO NEAR LEXINGTON. THIS LINE WAS MOVING SOUTHEAST AT 30 MPH. DAMAGING WINDS IN EXCESS OF 60 MPH ARE POSSIBLE WITH THESE STORMS. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DON'T DRIVE INTO ARZEAS WHERE WATER COVERS THE ROAD.
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.
In the hours before
Special weather statement, Jun 23, 1:16 PM CDT, 3 hours 25 minutes before
OKZ004>021-231900- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE OKLAHOMA CITY OK 113 PM CDT SUN JUN 23 1991 AT 113 PM NATIONAL WEATHER SERVICE RADAR INDICATED A LINE OF STRONG THUNDERSTORMS MOVING THROUGH NORTHWEST OKLAHOMA. THE LEADING EDGE OF THE THUNDERSTORM LINE WAS LOCATED FROM HELENA...TO SEILING...TO JUST SOUTH OF REYDON. THE STORMS WERE MOVING SOUTHEAST AT 30 MPH AND MAY PRODUCE HALF-INCH DIAMETER HAIL...WINDS TO 50 MPH...AND HEAVY RAINFALL. THESE STORMS LIKELY WILL MOVE INTO CENTRAL OKLAHOMA BETWEEN 3 AND 4 PM.
Special weather statement, Jun 23, 1:26 PM CDT, 3 hours 15 minutes before
TXC337-230030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WICHITA FALLS TX 125 PM CDT SUN JUN 23 1991 ...SEVERE THUNDERSTORM WATCH IN EFFECT FOR FOARD..HARDEMAN.. AND WILBARGER COUNTIES OF NORTHCENTRAL TEXAS UNTIL 700 PM CDT... AT 115 PM CDT NATIONAL WEATHER SERVICE RADAR SHOWED SCATTERED HEAVY THUNDERSTORMS BEGINNING TO DEVELOPE INTO A LINE OF THUNDERSTORMS EXTENDING SOUTH FROM NORMAN OKLAHOMA SOTH TO SAINT JO IN EXTREME EASTERN MONTAGUE COUNTY. AT THIS TIME THESE STROMS ARE ONLY PRODUCING SHORT PERIODS OF LOCALLY HEAVY RAIN AND GUSTY SURFACE WIND...HOWEVER AS AFTERNOON HEATING CONTINUES THESE STORMS ARE LIKELY TO FURTHER DEVELOPE AND MAY BECOME SEVERE. IN OTHER AREAS SEVERE THUNDERSTORMS WERE OCCURRING 125 MILES NORTHWEST OF WICHITA FALLS AND WERE MOVING SLOWLY SOUTHEAST AND MAY AFFECT WICHITA FALLS AND SURROUNDING AREAS LATER THIS AFTERNOON AND EVENING. NO THUNDERSTORMS WERE NOTED IN HARDEMAN..FOARD.. AND WILBARGER COUNTINES AT THIS TIME. THE POTENTIAL FOR DEVELOPING SEVERE WEATHER ACROSS NORTH CENTRAL TEXAS REMAINS HIGH FOR LATE THIS AFTERNOON AND EVENING..ALL PERSONS IN NORTH CENTRAL TEXAS SHOULD KEEP ABREAST OF WEATHER DEVELOPMENTS. STORM SPOTTERS SHOULD BE PREPARED FOR POSSIBLE ACTIVITATION IF SEVERE WEATHER BECOMES IMMINENT IN YOUR AREA.
Special weather statement, Jun 23, 2:24 PM CDT, 2 hours 17 minutes before
TXC337-230030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WICHITA FALLS TX 225 PM CDT SUN JUN 23 1991 ...SEVERE THUNDERSTORM WATCH IN EFFECT FOR FOARD..HARDEMAN.. AND WILBARGER COUNTIES OF NORTHCENTRAL TEXAS UNTIL 700 PM CDT... AT 215 PM CDT NATIONAL WEATHER SERVICE RADAR SHOWED AN AREA OF SEVERE THUNDERSTORMS ACROSS WEST CENTRAL OKLAHOMA. THE LEADING EDGE OF SEVERE THUNDERSTORMS WAS LOCATED 30 MILES NORTHWEST OF HOBART AND EXTENDED NORTH EAST TO 35 MILES NORTHWEST OF OKLAHOMA CITY OKLAHOMA. MOVEMENT WAS TO THE SOUTHEAST AT 30 MPH. IF THIS AREA OF SEVERE THUNDERSTORMS CONTINUES ITS CURRENT COURSE AND SPEED ... THEY WOULD CROSS THE RED RIVER INTO NORTH CENTRAL TEXAS NEAR WICITA FALLS BETWEEN 500 AND 600 PM CDT THIS EVENING. THSES STORMS WILL BE MONITORED CLOSELY THIS AFTERNOON. NO THUNDERSTORMS WERE NOTED IN HARDEMAN..FOARD.. AND WILBARGER COUNTINES AT THIS TIME. THE POTENTIAL FOR DEVELOPING SEVERE WEATHER ACROSS NORTH CENTRAL TEXAS REMAINS HIGH FOR LATE THIS AFTERNOON AND EVENING..ALL PERSONS IN NORTH CENTRAL TEXAS SHOULD KEEP ABREAST OF WEATHER DEVELOPMENTS. STORM SPOTTERS SHOULD BE PREPARED FOR POSSIBLE ACTIVITATION IF SEVERE WEATHER BECOMES IMMINENT IN YOUR AREA.
Special weather statement, Jun 23, 2:30 PM CDT, 2 hours 11 minutes before
OKZ004>018-232000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE OKLAHOMA CITY OK 225 PM CDT SUN JUN 23 1991 ...THUNDERSTORMS APPROACHING SOUTHWEST AND CENTRAL OKLAHOMA... AT 225 PM CDT RADAR INDICATED A LINE OF STRONG THUNDERSTORMS EXTENDING FROM NEAR DOVER TO WEATHERFORD TO JUST WEST OF HOBART. THIS LINE OF STORMS WAS MOVING EAST-SOUTHEAST AT 35 MPH. THE STORMS WILL ENTER SOUTHWEST AND CENTRAL OKLAHOMA BY 4 PM CDT. HAIL UP TO A HALF INCH IN DIAMETER...WINDS TO NEAR 50 MPH AND FREQUENT LIGHTNING ARE POSSIBLE WITH THESE THUNDERSTORMS. PERSONS ENGAGED IN OUTDOOR ACTIVITIES...ESPECIALLY AREA LAKES SHOULD BE PREPARED TO MOVE TO SHELTER.
Special weather statement, Jun 23, 3:20 PM CDT, 1 hour 21 minutes before
TXC337-230030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WICHITA FALLS TX 320 PM CDT SUN JUN 23 1991 ...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 1000 PM CDT THIS EVENING... AT 315 PM CDT NATIONAL WEATHER SERVICE RADAR SHOWED A LINE OF SEVERE THUNDERSTORMS ACROSS SOUTHWEST AND WEST CENTRAL OKLAHOMA. THE LEADING EDGE OF THIS LINE OF SEVERE THUNDERSTORMS EXTENDED NORTHEAST FROM NEAR HOBART OKLAHOMA TO JUST NORTH OF OKLAHOMA CITY OKLAHOMA. MOVEMENT WAS TO THE EAST SOUTHEAST AT 30 MPH. IF THIS AREA OF SEVERE THUNDERSTORMS CONTINUES ITS CURRENT COURSE AND SPEED ... THEY WOULD CROSS THE RED RIVER INTO NORTH CENTRAL TEXAS NEAR OR EAST OF WICITA FALLS AROUND 500 PM CDT THIS EVENING. THESE STORMS WILL BE MONITORED CLOSELY THIS AFTERNOON AS THEY MOVE SOUTHEAST. THE POTENTIAL FOR DEVELOPING SEVERE WEATHER ACROSS NORTH CENTRAL TEXAS IS HIGH THIS AFTERNOON AND EVENING. PERSONS IN NORTH CENTRAL TEXAS SHOULD KEEP ABREAST OF WEATHbER DEVELOPMENTS. STORM SPOTTERS SHOULD BE PREPARED FOR POSSIBLE ACTIVITATION IF SEVERE WEATHER BECOMES IMMINENT IN YOUR AREA.
Special weather statement, Jun 23, 4:32 PM CDT, 9 minutes before
TXC009-023-077-155-197-275-337-485-487-232230- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WICHITA FALLS TX 432 PM CDT SUN JUN 23 1991 ...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 10 PM CDT.... AT 420 PM CDT...NEAREST THUNDERSTORMS WERE NEAR OKLAHOMA CITY. THESE STORMS WERE MOVING TO THE SOUTHEAST AT 20 MPH. THE ATMOSPHERE IN THE WICHITA FALLS AREA IS VERY UNSTABLE. THE POTENTIAL FOR SEVERE THUNDERSTORMS IN QUITE HIGH. PERSONS IN ARCHER..BAYLOR..CLAY..FOARD..HARDEMAN..KNOX..MONTAGUE..WICHITA..AND WILBARGER COUNTIES SHOULD BE PREPARED TO TAKE ACTION SHOULD SEVERE WEATHER APPROACH. STORM SPOTTERS SHOULD BE PREPARED FOR POSSIBLE ACTIVATION IF SEVERE WEATHER DOES OCCUR. STAY TUNED TO NOAA WEATHER RADIO OR TELEVISION FOR FURTHER STATEMENTS AND POSSIBLE WARNINGS. PB/RD
The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 22, 7:03 PM CDT | Severe Thunderstorm Warning | OUN | Pushmataha | 57 min |
| Jun 22, 7:22 PM CDT | Severe Thunderstorm Warning | OUN | Garvin | 68 min |
| Jun 22, 7:49 PM CDT | Severe Thunderstorm Warning | OUN | Choctaw | 56 min |
| Jun 22, 7:55 PM CDT | Severe Thunderstorm Warning | OUN | Bryan, Johnston | 65 min |
| Jun 22, 8:09 PM CDT | Flash Flood Warning | OUN | Bryan | 2 hr |
| Jun 22, 8:22 PM CDT | Severe Thunderstorm Warning | OUN | Carter | 68 min |
| Jun 22, 8:51 PM CDT | Severe Thunderstorm Warning | OUN | Marshall | 69 min |
| Jun 22, 9:20 PM CDT | Severe Thunderstorm Warning | OUN | Murray | 55 min |
| Jun 22, 9:24 PM CDT | Severe Thunderstorm Warning | OUN | Love | 51 min |
| Jun 22, 9:25 PM CDT | Flash Flood Warning | OUN | Marshall | 3 hr |
| Jun 22, 10:10 PM CDT | Flash Flood Warning | OUN | Bryan | 2 hr |
| Jun 23, 12:33 PM CDT | Severe Thunderstorm Warning | OUN | Woods | 42 min |
| Jun 23, 1:51 PM CDT | Severe Thunderstorm Warning | OUN | Alfalfa, Garfield, Major | 69 min |
| Jun 23, 2:01 PM CDT | Severe Thunderstorm Warning | OUN | Grant | 59 min |
| Jun 23, 2:46 PM CDT | Severe Thunderstorm Warning | OUN | Logan, Noble, Payne | 59 min |
| Jun 23, 2:46 PM CDT | Severe Thunderstorm Warning | OUN | Kingfisher | 59 min |
| Jun 23, 2:55 PM CDT | Severe Thunderstorm Warning | OUN | Garfield | 35 min |
| Jun 23, 3:01 PM CDT | Severe Thunderstorm Warning | OUN | Canadian, Oklahoma | 59 min |
| Jun 23, 3:40 PM CDT | Severe Thunderstorm Warning | OUN | Logan, Noble, Payne | 65 min |
| Jun 23, 3:40 PM CDT | Severe Thunderstorm Warning | OUN | Lincoln | 65 min |
| Jun 23, 3:50 PM CDT | Severe Thunderstorm Warning | OUN | Canadian, Cleveland, Grady, McClain, Oklahoma | 55 min |
| Jun 23, 4:06 PM CDT | Severe Thunderstorm Warning | OUN | Pottawatomie | 69 min |
| Jun 23, 4:41 PM CDT | Severe Thunderstorm Warning | OUN | Cleveland | 34 min |
| Jun 23, 4:41 PM CDT | Severe Thunderstorm Warning | OUN | Seminole | 64 min |
| Jun 23, 4:45 PM CDT | Severe Thunderstorm Warning | OUN | Garvin, Pontotoc | 75 min |
| Jun 23, 5:20 PM CDT | Severe Thunderstorm Warning | OUN | Hughes | 40 min |
| Jun 23, 5:58 PM CDT | Severe Thunderstorm Warning | OUN | Coal, Johnston, Pontotoc | 62 min |
| Jun 23, 5:58 PM CDT | Severe Thunderstorm Warning | OUN | Hughes | 62 min |
| Jun 23, 5:58 PM CDT | Severe Thunderstorm Warning | OUN | Coal, Hughes, Pontotoc | 37 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 1991Every severe thunderstorm warning 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.