Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 621, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Oct 24, 1991, 5:29 PM CDT for Hughes County, Oklahoma. It was in force for 31 min.
The area
The counties it named.
The facts
- Issued
- Oct 24, 1991, 5:29 PM CDT (22:29 UTC)
- Expired
- Oct 24, 1991, 6:00 PM CDT
- In force
- 31 min
- Issued by
- NWS Norman, OK
- Area
- Whole counties
County Hughes County, OK
The radar
The Norman radar (KTLX), 99 km from the middle of the area, began a volume at 22:31 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.
The nearest sounding before it
Norman, OK (KOUN), launched 12:00Z, 10.5 hours before the alert went out and 106 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
- 1509 J/kg
- Mixed-layer CIN
- -77 J/kg
- Mixed-layer LCL
- 771 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 263 m²/s²
- 0-3 km storm-relative helicity
- 285 m²/s²
- Significant tornado parameter
- 1.2
- Supercell composite
- 9.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KOKC 242229 SVROKC OKC063-242300- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE OKLAHOMA CITY OK 529 PM CDT THU OCT 24 1991 THE NATIONAL WEATHER SERVICE IN OKLAHOMA CITY HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 600 PM CDT FOR THE FOLLOWING OKLAHOMA LOCATIONS... IN SOUTHEAST OKLAHOMA ...HUGHES COUNTY AT 529 PM RADAR INDICATED A SEVERE THUNDERSTORM MOVING INTO WESTERN HUGHES COUNTY JUST EAST OF SASAKWA. THE STORM IS MOVING EAST NORTHEAST AT 30 MPH AND WILL MOVE INTO THE AREA BETWEEN HOLDENVILLE AND CALVIN BETWEEN NOW AND 6 PM. HAIL TO 1 INCH IN DIAMETER IS POSSIBLE ALONG WITH STRONG DAMAGING WINDS. A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. REMAIN CALM BUT BE ALERT TO RAPIDLY CHANGING WEATHER CONDITIONS. WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A STRONG BUILDING. DO NOT STAND BY WINDOWS. DON'T USE TELEPHONES OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM HAS PASSED. MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS.
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, Oct 24, 12:21 PM CDT, 5 hours 8 minutes before
TXZ019-020-241825- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WICHITA FALLS TX 1220 PM CDT THU OCT 24 1991 ...SURFACE LOW...COLD FRONT AND DRY LINE NEAR WICHITA FALLS... JUST AFTER THE NOON HOUR...A COLD FRONT WAS LOCATED IN NORTHWEST OKLAHOMA INTO THE SOUTHERN TEXAS PANHANDLE. A DRY LINE/WIND SHIFT LINE WAS LOCATED NEAR HOBART OKLAHOMA TO BETWEEN CHILDRESS AND VERNON. AS THESE TWO WEATHER FEATURES SLOWLY PROGRESS INTO THIS SECTION OF NORTH CENTRAL TEXAS LATTER THIS AFTERNOON...AN INCREASING PROBABILITY OF THUNDERSTORMS IS EXPECTED. AFTERNOON TEMPERATURES IN THE MID TO UPPER 80S WILL INCREASE THE CHANCES OF THUNDERSTORM ACTIVITY IN THE UNSTABLE/MOIST ATMOSPHERE. THE HIGHEST PROBABILITY OF A THUNDERSTORM OUTBREAK IN THIS SECTION OF THE RED RIVER VALLEY IS EXPECTED ALONG OR EAST OF A WICHITA FALLS... ARCHER CITY...GRAHAM LINE. RESIDENTS IN AND NEAR THUNDERSTORMS IN THE ABOVE AREAS SHOULD EXPECT SEVERE WEATHER PAR#AMETERS IN THE FORM OF HAIL AND HIGH WIND.
Local storm report, Oct 24, 1:17 PM CDT, 4 hours 12 minutes before
LOCAL STORM REPORT NATIONAL WEATHER SERVICE OKLAHOMA CITY OK 116 PM CDT THU OCT 24 1991 DELAYED REPORT FOR WED AFTN ON THE 23TH OF OCT TIME(CDT) COUNTY REPORT 500 PM COTTON NICKLE-SIZED HAIL 15 MILES WEST OF WALTERS
Special weather statement, Oct 24, 3:37 PM CDT, 1 hour 52 minutes before
OKZ007-011-014-015-016-017-019-020-021-242130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE OKLAHOMA CITY OK 335 PM CDT THU OCT 24 1991 ...STRONG THUNDERSTORMS DEVELOPING ACROSS CENTRAL AND SOUTHERN OKLAHOMA... ...TORNADO WATCH UNTIL 10 PM FOR PORTIONS OF SOUTHERN AND EASTERN OKLAHOMA... ...SEVERE THUNDERSTORM WATCH UNTIL 10 PM PORTIONS OF NORTHERN AND EASTERN OKLAHOMA... AT 335 PM RADAR INDICATED A LINE OF INTESIFYING THUNDERSTORMS DEVELOPING FROM THE RED RIVER SOUTHWEST OF WAURIKA...NORTHEASTWARD TO JUST EAST OF PAULS VALLEY TO NEAR PRAGUE IN EXTREME SOUTHEAST LINCOLN COUNTY. THE STORMS WERE MOVING NORTHEAST AT 25 MPH. ADDITIONAL STRENGTHENING IS LIKELY THROUGH THE EVENING HOURS WITH A FEW STORMS BECOMING SEVERE. A COLD FRONT WAS PUSHING SOUTHEAST ACROSS OKLAHOMA AND LATE THIS AFTERNOON EXTENDED FROM PONCA CITY...TO OKLAHOMA CITY SOUTHWESTWARD TO NEAR HOBART. A DRYLINE WAS LOCATED IN ADVANCE OF THE FRONT FROM OKLAHOMA CITY SOUTHWARD TO NEAR WAURIKA. AREAS ALONG AND EAST OF THE COLD FRONT AND DRYLINE WILL STAND THE GREATEST THREAT OF SEVERE WEATHER THROUGH THE EVENING HOURS. RESIDENTS OF CENTRAL AND SOUTHERN OKLAHOMA SHOULD REMAIN ALERT FOR LATER %STATEMENTS AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.
Special weather statement, Oct 24, 4:08 PM CDT, 1 hour 21 minutes before
TXZ019-020-242300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WICHITA FALLS TX 410 PM CDT THU OCT 24 1991 ...A TORNADO WATCH IS IN EFFECT FOR MONTAGUE COUNTY UNTIL 10 PM CDT THIS EVENING... AT 400 PM CDT THE WICHITA FALLS RADAR SHOWED A FEW THUNDERSTORMS DEVELOPING OVER EXTREME NORTHEASTERN CLAY COUNTY. THE STRONGEST STORM WAS LOCATED JUST SOUTH OF THE RED RIVER NEAR BYERS. MOVEMENT OF THESE THUNDERSTORMS TO THE NORTHEAST AT 25 TO 30 MPH. ALSO RADAR WAS SHOWING A FINE LINE WHICH IS THE INDICATION OF A COLD FRONT TO THE WEST OF WICHITA FALLS STRETCHING FROM JUST EAST OF LAWTON TO NEAR ELECTRA AND ON SOUTHWEST TO NEAR MARGARET IN NORTHERN FOARD COUNTY. STAY TUNED TO NOAA WEATHER RADIO FOR LATER STATEMENTS AND POSSIBLE WARNINGS. THE HIGHEST PROBABILITY OF A THUNDERSTORM OUTBREAK IN THIS SECTION OF THE RED RIVER VALLEY IS EXPECTED ALONG OR EAST OF A WICHITA FALLS... ARCHER CITY...GRAHAM LINE. RESIDENTS IN AND NEAR THUNDERSTORMS IN THE ABOVE AREAS SHOULD EXPECT SEVERE WEATHER PARAMETERS IN THE FORM OF HAIL AND HIGH WIND.
Special weather statement, Oct 24, 4:12 PM CDT, 1 hour 17 minutes before
TXZ019-020-242300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WICHITA FALLS TX 410 PM CDT THU OCT 24 1991 ...A TORNADO WATCH IS IN EFFECT FOR MONTAGUE COUNTY UNTIL 10 PM CDT THIS EVENING... AT 400 PM CDT THE WICHITA FALLS RADAR SHOWED A FEW THUNDERSTORMS DEVELOPING OVER EXTREME NORTHEASTERN CLAY COUNTY. THE STRONGEST STORM WAS LOCATED JUST SOUTH OF THE RED RIVER NEAR BYERS. MOVEMENT OF THESE THUNDERSTORMS TO THE NORTHEAST AT 25 TO 30 MPH. ALSO RADAR WAS SHOWING A FINE LINE WHICH IS THE INDICATION OF A COLD FRONT TO THE WEST OF WICHITA FALLS STRETCHING FROM JUST EAST OF LAWTON TO NEAR ELECTRA AND ON SOUTHWEST TO NEAR MARGARET IN NORTHERN FOARD COUNTY. STAY TUNED TO NOAA 9WEATHER RADIO FOR LATER STATEMENTS AND POSSIBLE WARNINGS.
Special weather statement, Oct 24, 5:29 PM CDT, 0 minutes before
TXZ019-020-242300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WICHITA FALLS TX 525 PM CDT THU OCT 24 1991 ...A TORNADO WATCH IS IN EFFECT FOR MONTAGUE COUNTY UNTIL 10 PM CDT THIS EVENING... AT 520 PM CDT THE WICHITA FALLS RADAR SHOWED A BROKEN LINE OF THUNDER STORMS STRETCHING FROM THE RED RIVER IN SOUTHEASTERN JEFFERSON COUNTY IN SOUTHCENTRAL OKLAHOMA NORTHEAST TO NEAR WETUMKA. MOVEMENT OF THESE THUNDERSTORMS TO THE NORTHEAST AT 25 TO 30 MPH. ALSO RADAR WAS SHOWING A FINE LINE WHICH IS THE INDICATION OF A COLD FRONT TO THE WEST OF WICHITA FALLS STRETCHING FROM DUNCAN...TO NEAR IOWA PARK AND SOUTHWEST TO NEAR LAKE KEMP. MOVEMENT OF THIS LINE TO THE EAST AT APPROXIMATELY 10 MILES AN HOUR.
The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 23, 7:19 PM CDT | Severe Thunderstorm Warning | OUN | Caddo, Canadian, Grady | 56 min |
| Oct 23, 11:55 PM CDT | Severe Thunderstorm Warning | OUN | Oklahoma | 50 min |
| Oct 24, 1:39 AM CDT | Severe Thunderstorm Warning | OUN | Lincoln | 51 min |
| Oct 24, 1:52 AM CDT | Severe Thunderstorm Warning | OUN | Payne | 38 min |
| Oct 24, 2:03 AM CDT | Tornado Warning | OUN | Payne | 27 min |
| Oct 24, 4:25 AM CDT | Severe Thunderstorm Warning | OUN | Pontotoc | 50 min |
| Oct 24, 4:07 PM CDT | Severe Thunderstorm Warning | OUN | Seminole | 53 min |
| Oct 24, 4:43 PM CDT | Severe Thunderstorm Warning | OUN | Carter, Jefferson | 47 min |
| Oct 24, 4:53 PM CDT | Severe Thunderstorm Warning | OUN | Seminole | 37 min |
| Oct 24, 5:57 PM CDT | Severe Thunderstorm Warning | OUN | Hughes | 33 min |
| Oct 24, 6:20 PM CDT | Severe Thunderstorm Warning | OUN | Pontotoc | 25 min |
| Oct 24, 6:30 PM CDT | Severe Thunderstorm Warning | OUN | Hughes | 45 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.