Alert archive / Oklahoma / Flash Flood Warnings in 1989

Flash Flood Warning 2, NWS Tulsa, OK

May 20, 1989Muskogee County, Okmulgee County, Oklahoma

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.

Skew-T log-pSkew-T log-p diagram, Norman, OK at 00:00Z on 1989-05-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1625 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Norman, OK at 00:00Z on 1989-05-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 23 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
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

Open this sounding in Storm Lab

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.

IssuedProductOfficeCountiesLasted
May 20, 12:18 AM CDTSevere Thunderstorm WarningTSAMuskogee42 min
May 20, 12:55 AM CDTSevere Thunderstorm WarningTSAOkmulgee50 min
May 20, 1:09 AM CDTSevere Thunderstorm WarningTSAWagoner66 min
May 20, 1:28 AM CDTSevere Thunderstorm WarningTSAMuskogee47 min
May 20, 1:50 AM CDTSevere Thunderstorm WarningTSAOkmulgee55 min
May 20, 2:09 AM CDTTornado WarningTSAMuskogee, Okmulgee66 min
May 20, 2:20 AM CDTSevere Thunderstorm WarningTSAMayes, Rogers55 min
May 20, 2:50 AM CDTSevere Thunderstorm WarningTSAOkmulgee40 min
May 20, 3:01 AM CDTSevere Thunderstorm WarningTSAMuskogee59 min
May 20, 3:35 AM CDTSevere Thunderstorm WarningTSAMcIntosh, Okmulgee55 min
May 20, 3:43 AM CDTSevere Thunderstorm WarningTSASequoyah62 min
May 20, 4:05 AM CDTSevere Thunderstorm WarningTSAAdair, Cherokee55 min
May 20, 4:26 AM CDTSevere Thunderstorm WarningTSACreek, Okmulgee64 min
May 20, 4:50 AM CDTSevere Thunderstorm WarningTSAMcIntosh55 min
May 20, 4:50 AM CDTSevere Thunderstorm WarningTSASequoyah55 min
May 20, 5:14 AM CDTSevere Thunderstorm WarningTSALeFlore61 min
May 20, 5:47 AM CDTSevere Thunderstorm WarningTSASequoyah28 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.