Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1989
Severe Thunderstorm Warning 521, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Sep 13, 1989, 3:25 AM CDT for Johnston County, Marshall County, Oklahoma. It was in force for 50 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
- Sep 13, 1989, 3:25 AM CDT (08:25 UTC)
- Expired
- Sep 13, 1989, 4:15 AM CDT
- In force
- 50 min
- Issued by
- NWS Norman, OK
- Area
- Whole counties
Counties Johnston County, OK, Marshall County, OK
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 13, 4:00 AM CDT | Thunderstorm Wind 0 | Johnston, 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, 8.4 hours before the alert went out and 132 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
- 44 J/kg
- Mixed-layer CIN
- -223 J/kg
- Mixed-layer LCL
- 551 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 348 m²/s²
- 0-3 km storm-relative helicity
- 518 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.4
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KOKC 130830 SVROKC OKC069-095-130915- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE OKLAHOMA CITY OK 325 AM CDT WED SEP 13 1989 THE NATIONAL WEATHER SERVICE IN OKLAHOMA CITY HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 415 AM CDT FOR THE FOLLOWING OKLAHOMA LOCATIONS... IN SOUTHEAST OKLAHOMA ...SOUTHERN JOHNSTON COUNTY...MARSHALL COUNTY AT 325 PM CDT RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS EXTENDING FROM NEAR MANNSVILLE TO OAKLAND TO LEBANON MOVING TOWARD THE EAST AT 35 MILES PER HOUR. WINDS IN EXCESS OF 60 MPH MAY BE EXPECTED ALONG THIS LINE OF THUNDERSTORMS AS IT MOVES THROUGH RAVIA...TISHOMINGO...MADILL...AND THE NORTHERN PART OF LAKE TEXOMA BY 415 AM. 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 AREAS 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, Sep 12, 10:22 PM CDT, 5 hours 3 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WICHITA FALLS TX 1023 PM CDT TUE SEP 12 1989 ...FLASH FLOOD WATCH IS IN EFFECT TONIGHT NORTH OF A HASKELL TO MONTAGUE LINE. THE CITIES OF WICHITA FALLS...HASKELL...HENRIETTA...MONTAGUE... ARCHER CITY AND SEYMOUR ARE IN THE WATCH AREA... A SLOW MOVING COLD FRONT WAS WEST OF THE AREA MOVING SOUTH AT 10 MPH. THE THUNDERSTORMS IN THIS LINE WERE MOVING NORTHEAST AT 25 MPH AND IS CAPABLE OF PRODUCING 3 TO 5 INCHES OF RAIN OVER THE WATCH AREA. AT 1020 CDT RADAR INDICATED THE LEADING EDGE OF THE RAIN AREA FROM EAST OF LUBBOCK TO CROWELL NORTHEASTWARD INTO OKLAHOMA TO NEAR MCALESTER. VERY HEAVY RAIN WAS FALLING IN THE CROWELL AREA. RAI N IS EXPECTED TO FALL IN THE WICHITA FALLS AREA AFTER MIDNIGHT WITH HEAVY RAIN...GUSTY WINDS...DEADLY LIGHTNING AND SMALL HAIL POSSIBLE. MONITER YOUR LOCAL MEDIA OR NOAA WEATHER RADIO FOR LATER STATEMENTS OR POSSIBLE WARNINGS.
Special weather statement, Sep 13, 1:38 AM CDT, 1 hour 47 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE OKLAHOMA CITY OK 135 AM CDT WED SEP 13 1989 ...SEVERE THUNDERSTORM WARNING EXPIRES FOR JEFFERSON COUNTY... THE SEVERE THUNDERSTORM WHICH WAS NEAR ADDINGTON AT 1249 MOVED EASTWARD AND WEAKENED...AND THE SEVERE THUNDERSTORM WARNING WILL NOT BE REISSUED. AT 130 AM A LINE OF VERY STRONG THUNDERSTORMS CONTINUED ACROSS JEFFERSON AND CARTER COUNTIES...ROUGHLY FROM RATLIFF CITY TO GRADY. VERY HEAVYj RAINFALL AND GUSTY WINDS ARE LIKELY WITH THESE THUNDERSTORMS AS THEY MOVE THROUGH MURRAY...CARTER...AND LOVE COUNTIES. STAY TUNED TO NOAA WEATHER RADIO OR TO COMMERCIAL RADIO OR TELEVISION FOR LATER UPDATES AND POSSIBLE WARNINGS.
The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 12, 8:10 PM CDT | Flash Flood Warning | OUN | Canadian, Lincoln, Oklahoma | 3 hr |
| Sep 12, 10:25 PM CDT | Severe Thunderstorm Warning | OUN | Comanche | 50 min |
| Sep 12, 11:22 PM CDT | Flash Flood Warning | OUN | Oklahoma | 2 hr |
| Sep 12, 11:33 PM CDT | Severe Thunderstorm Warning | OUN | Comanche | 27 min |
| Sep 12, 11:59 PM CDT | Severe Thunderstorm Warning | OUN | Stephens | 46 min |
| Sep 13, 12:46 AM CDT | Flash Flood Warning | OUN | Canadian, Cleveland, Oklahoma | 119 min |
| Sep 13, 12:49 AM CDT | Severe Thunderstorm Warning | OUN | Jefferson | 41 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 1989Every severe thunderstorm warning in 1989
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.