Alert archive / Oklahoma / Flash Flood Warnings in 1989
Flash Flood Warning 32, NWS Norman, OK
NWS Norman, OK issued this flash flood warning at Sep 13, 1989, 12:46 AM CDT for Canadian County, Cleveland County, Oklahoma County, Oklahoma. It was in force for 119 min.
The area
The counties it named.
The facts
- Issued
- Sep 13, 1989, 12:46 AM CDT (05:46 UTC)
- Expired
- Sep 13, 1989, 2:45 AM CDT
- In force
- 119 min
- Issued by
- NWS Norman, OK
- Area
- Whole counties
Counties Canadian County, OK, Cleveland County, OK, Oklahoma County, OK
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Norman, OK (KOUN), launched 00:00Z, 5.8 hours before the alert went out and 28 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
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
What forecasters said that day
The local office's own words before this flash flood 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, 2 hours 24 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.
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, 12:49 AM CDT | Severe Thunderstorm Warning | OUN | Jefferson | 41 min |
| Sep 13, 3:25 AM CDT | Severe Thunderstorm Warning | OUN | Johnston, Marshall | 50 min |
Nearby
Flash Flood Warnings in Oklahoma, 1989Every flash flood 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; the sounding from the Mesonet's radiosonde archive.