Alert archive / Oklahoma / Flash Flood Warnings in 1998

Flash Flood Warning 12, NWS Tulsa, OK

May 5, 1998McIntosh County, Okmulgee County, Oklahoma

NWS Tulsa, OK issued this flash flood warning at May 5, 1998, 5:41 AM CDT for McIntosh County, Okmulgee County, Oklahoma. It was in force for 109 min. 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 5, 1998, 5:41 AM CDT (10:41 UTC)
Expired: May 5, 1998, 7:30 AM CDT
In force: 109 min
Issued by: NWS Tulsa, OK
Area: Whole counties

Counties McIntosh County, OK, Okmulgee County, OK

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 10.7 hours before the alert went out and 147 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 7 J/kg
Mixed-layer CIN: -421 J/kg
Mixed-layer LCL: 2029 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 52 m²/s²
0-3 km storm-relative helicity: 238 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KTUL 051041
FFWTUL
OKC091-111-051230-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TULSA OK
541 AM CDT TUE MAY 5 1998

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WESTERN MCINTOSH COUNTY IN EAST CENTRAL OKLAHOMA
  SOUTHERN OKMULGEE COUNTY IN NORTHEASTERN OKLAHOMA

* UNTIL 730 AM CDT

* AT 540 AM... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THUNDERSTORMS WITH VERY HEAVY RAIN EAST OF HENRYETTA... MOVING EAST
  AT 10 MPH.

* SURFACE OBSERVATIONS AND RADAR ESTIMATES INDICATE THAT
  BETWEEN TWO AND THREE INCHES OF RAIN HAS FALLEN FROM SOUTHERN
  OKMULGEE COUNTY INTO WESTERN MCINTOSH COUNTY NEAR I-40. ANOTHER
  CLUSTER OF THUNDERSTORMS PRODUCING VERY HEAVY RAIN WILL MOVE ACROSS
  THIS AREA THROUGH 730 AM WHICH MAY PRODUCE FLOODING.

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

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.

NWS Tulsa, OK wrote its last area forecast discussion before this flash flood warning went out at May 5, 3:20 AM CDT, 2 hours 21 minutes earlier.

Area forecast discussion, May 5, 3:20 AM CDT, 2 hours 21 minutes before

FPUS3 KTUL 050821
AFDTUL

EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
320 AM CDT TUE MAY 5 1998

PROBLEM OF THE DAY:
FIGURING OUT WHAT WILL HAPPEN AFTER THIS MORNING.

MODELS ARE OSEVERE THUNDERSTORM WARNING FOR...
     SOUTHEAST LINCOLN COUNTY IN CENTRAL OKLAHOMA

* UNTIL 400 AM CDT

* AT 322 AM CDT DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM NEAR
PRAGUE...MOVING EAST-NORTHEAST AT 15 MILES PER HOUR.

* LOCATIONS IN THE WARNING INCLUDE PRAGUE

HAIL UP TO THE SIZE OF GOLFBALLS AND WIND GUSTS TO AT LEAST 60 MPH ARE
LIKELY. SEEK SHELTER INDOORS...AWAY FROM WINDOWS...AND AVOID
ELECTRICAL APPLIANCES AND TELEPHONES.

LAT...LON 3547 9682 3547 9667 3567 9622 3563 9664

The office that day

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

Issued	Product	Office	Counties	Lasted
May 5, 3:19 AM CDT	Severe Thunderstorm Warning	TSA	Okfuskee	71 min
May 5, 4:15 AM CDT	Severe Thunderstorm Warning	TSA	Creek, Tulsa	60 min
May 5, 4:23 AM CDT	Flash Flood Warning	TSA	Okfuskee	3 hr
May 5, 4:28 AM CDT	Severe Thunderstorm Warning	TSA	Okfuskee, Okmulgee	62 min
May 5, 4:48 AM CDT	Severe Thunderstorm Warning	TSA	McIntosh	72 min
May 5, 5:05 AM CDT	Severe Thunderstorm Warning	TSA	Rogers, Tulsa, Wagoner	40 min
May 5, 5:27 AM CDT	Severe Thunderstorm Warning	TSA	Okmulgee	33 min
May 5, 5:53 AM CDT	Severe Thunderstorm Warning	TSA	Okfuskee	37 min
May 5, 6:15 AM CDT	Severe Thunderstorm Warning	TSA	Okmulgee	45 min
May 5, 6:33 AM CDT	Severe Thunderstorm Warning	TSA	McIntosh	57 min
May 5, 6:42 AM CDT	Severe Thunderstorm Warning	TSA	Pittsburg	63 min
May 5, 7:30 AM CDT	Severe Thunderstorm Warning	TSA	Haskell, LeFlore	45 min
May 5, 7:42 AM CDT	Severe Thunderstorm Warning	TSA	Pushmataha	63 min
May 5, 9:00 AM CDT	Severe Thunderstorm Warning	TSA	Choctaw, Pushmataha	60 min

Nearby

Flash Flood Warnings in Oklahoma, 1998 Every 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.