Alert archive / Oklahoma / Flash Flood Warnings in 1989
Flash Flood Warning 2, NWS Tulsa, OK
NWS Tulsa, OK issued this flash flood warning at May 20, 1989, 3:15 AM CDT for Muskogee County, Okmulgee County, Oklahoma. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- May 20, 1989, 3:15 AM CDT (08:15 UTC)
- Expired
- May 20, 1989, 6:15 AM CDT
- In force
- 3 hr
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties
Counties Muskogee County, OK, Okmulgee 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, 8.3 hours before the alert went out and 163 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
- 1625 J/kg
- Mixed-layer CIN
- -199 J/kg
- Mixed-layer LCL
- 2005 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 23 m²/s²
- 0-3 km storm-relative helicity
- 78 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.8
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KTUL 200815
FFWTUL
OKC101-111-201115-
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TULSA OK
315 AM CDT SAT MAY 20 1989
THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 615 AM CDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
IN EAST CENTRAL OKLAHOMA
...MUSKOGEE
IN NORTHEAST OKLAHOMA
...OKMULGEE
AT 315 AM CDT RADAR INDICATED HEAVY THUNDERSTORMS CONTINUING ACROSS
MUSKOGEE AND OKMULGEE COUNTIES THE PAST THREE HOURS. THESE THUNDER
STORMS ARE MOVING VERY SLOWLY AND ARE PRODUCING VERY HEAVY RAIN.
THE POTENTIAL FOR FLASH FLOODING IS INCREASING RAPIDLY.
A FLASH FLOOD WARNING MEANS THAT FLOODING IS LIKELY OR HAS BEEN
REPORTED. STAY ALERT AND WATCH FOR RAPIDLY RISING WATER.
REMEMBER...IT'S IMPORTANT TO KNOW WHERE YOU ARE RELATIVE TO THE
NEAREST STREAM...CREEK OR RIVER WHICH CAN BECOME A KILLER DURING
PERIODS OF HEAVY RAIN.The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 20, 12:18 AM CDT | Severe Thunderstorm Warning | TSA | Muskogee | 42 min |
| May 20, 12:55 AM CDT | Severe Thunderstorm Warning | TSA | Okmulgee | 50 min |
| May 20, 1:09 AM CDT | Severe Thunderstorm Warning | TSA | Wagoner | 66 min |
| May 20, 1:28 AM CDT | Severe Thunderstorm Warning | TSA | Muskogee | 47 min |
| May 20, 1:50 AM CDT | Severe Thunderstorm Warning | TSA | Okmulgee | 55 min |
| May 20, 2:09 AM CDT | Tornado Warning | TSA | Muskogee, Okmulgee | 66 min |
| May 20, 2:20 AM CDT | Severe Thunderstorm Warning | TSA | Mayes, Rogers | 55 min |
| May 20, 2:50 AM CDT | Severe Thunderstorm Warning | TSA | Okmulgee | 40 min |
| May 20, 3:01 AM CDT | Severe Thunderstorm Warning | TSA | Muskogee | 59 min |
| May 20, 3:35 AM CDT | Severe Thunderstorm Warning | TSA | McIntosh, Okmulgee | 55 min |
| May 20, 3:43 AM CDT | Severe Thunderstorm Warning | TSA | Sequoyah | 62 min |
| May 20, 4:05 AM CDT | Severe Thunderstorm Warning | TSA | Adair, Cherokee | 55 min |
| May 20, 4:26 AM CDT | Severe Thunderstorm Warning | TSA | Creek, Okmulgee | 64 min |
| May 20, 4:50 AM CDT | Severe Thunderstorm Warning | TSA | McIntosh | 55 min |
| May 20, 4:50 AM CDT | Severe Thunderstorm Warning | TSA | Sequoyah | 55 min |
| May 20, 5:14 AM CDT | Severe Thunderstorm Warning | TSA | LeFlore | 61 min |
| May 20, 5:47 AM CDT | Severe Thunderstorm Warning | TSA | Sequoyah | 28 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.