Alert archive / Oklahoma / Flash Flood Warnings in 1998

Flash Flood Warning 13, NWS Tulsa, OK

May 6, 1998LeFlore County, Oklahoma

NWS Tulsa, OK issued this flash flood warning at May 6, 1998, 3:56 AM CDT for LeFlore County, Oklahoma. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
May 6, 1998, 3:56 AM CDT (08:56 UTC)
Expired
May 6, 1998, 6:15 AM CDT
In force
2 hr
Issued by
NWS Tulsa, OK
Area
Whole counties

County LeFlore County, OK

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 8.9 hours before the alert went out and 248 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 1998-05-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 906 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Norman, OK at 00:00Z on 1998-05-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 72 square meters per square second.1939587897Sfc1 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
906 J/kg
Mixed-layer CIN
-22 J/kg
Mixed-layer LCL
806 m above ground
0-6 km bulk shear
60 kt
0-1 km storm-relative helicity
72 m²/s²
0-3 km storm-relative helicity
249 m²/s²
Significant tornado parameter
0.9
Supercell composite
4.5

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KTUL 060857
FFWTUL
OKC079-061115-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TULSA OK
356 AM CDT WED MAY 6 1998

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  LE FLORE COUNTY IN SOUTHEASTERN OKLAHOMA

* UNTIL 615 AM CDT

* AT 355 AM... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THUNDERSTORMS WITH VERY HEAVY RAIN FROM NEAR RED OAK TO WISTER TO
  HEAVENER...MOVING EAST SOUTHEAST AT 20 MPH.

* THE THUNDERSTORMS WILL CONTINUE TO MOVE OVER CENTRAL
  LEFLORE COUNTY...WHERE RADAR INDICATED NEARLY 2 INCHES OF RAIN
  HAS ALREADY FALLEN.

DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD!

The office that day

Everything else NWS Tulsa, OK issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 6, 1:56 AM CDTSevere Thunderstorm WarningTSAAdair49 min
May 6, 2:42 AM CDTSevere Thunderstorm WarningTSALeFlore48 min
May 6, 3:26 AM CDTSevere Thunderstorm WarningTSALeFlore34 min
May 6, 3:59 AM CDTSevere Thunderstorm WarningTSALeFlore46 min
May 6, 4:41 PM CDTSevere Thunderstorm WarningTSAOkfuskee49 min
May 6, 5:07 PM CDTSevere Thunderstorm WarningTSACreek, Okmulgee53 min
May 6, 5:26 PM CDTSevere Thunderstorm WarningTSAMuskogee64 min
May 6, 5:41 PM CDTTornado WarningTSAOkmulgee49 min
May 6, 5:49 PM CDTSevere Thunderstorm WarningTSAWagoner56 min
May 6, 5:55 PM CDTSevere Thunderstorm WarningTSACreek, Tulsa65 min
May 6, 6:06 PM CDTSevere Thunderstorm WarningTSAMuskogee24 min
May 6, 6:11 PM CDTSevere Thunderstorm WarningTSAOsage, Washington64 min
May 6, 6:14 PM CDTTornado WarningTSAMuskogee46 min
May 6, 6:20 PM CDTTornado WarningTSANowata, Washington40 min
May 6, 6:29 PM CDTTornado WarningTSAMcIntosh61 min
May 6, 6:36 PM CDTSevere Thunderstorm WarningTSACherokee54 min
May 6, 6:38 PM CDTSevere Thunderstorm WarningTSACraig52 min
May 6, 6:43 PM CDTSevere Thunderstorm WarningTSAMayes, Rogers, Wagoner77 min
May 6, 6:54 PM CDTFlash Flood WarningTSATulsa3 hr
May 6, 6:59 PM CDTSevere Thunderstorm WarningTSACreek61 min

Nearby

Flash Flood Warnings in Oklahoma, 1998Every flash flood warning in 1998

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.