Alert archive / Oklahoma / Flash Flood Warnings in 1998

Flash Flood Warning 21, NWS Tulsa, OK

June 18, 1998Okfuskee County, Oklahoma

NWS Tulsa, OK issued this flash flood warning at Jun 18, 1998, 6:53 PM CDT for Okfuskee 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: Jun 18, 1998, 6:53 PM CDT (23:53 UTC)
Expired: Jun 18, 1998, 9:00 PM CDT
In force: 2 hr
Issued by: NWS Tulsa, OK
Area: Whole counties

County Okfuskee County, OK

The radar

The Norman radar (KTLX), 88 km from the middle of the area, began a volume at 23:56 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 11.9 hours before the alert went out and 101 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: 1939 J/kg
Mixed-layer CIN: -299 J/kg
Mixed-layer LCL: 1074 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 436 m²/s²
0-3 km storm-relative helicity: 495 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.7

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KTUL 182353
FFWTUL
OKC107-190200-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TULSA OK
653 PM CDT THU JUN 18 1998

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN OKFUSKEE COUNTY IN EAST CENTRAL OKLAHOMA

* UNTIL 900 PM CDT

* AT 650 PM...NWS RADAR ESTIMATED NEARLY 3 INCHES OF RAIN HAS FALLEN
IN THE LAST HOUR. UP TO 2 INCHES OF ADDITIONAL RAINFALL IS LIKELY
OVER THE NEXT HOUR ACROSS NORTHERN OKFUSKEE COUNTY INCLUDING THE CITY
OF OKFUSKEE.

DON'T DRIVE ACROSS FLOODED ROADS! MOST FLASH FLOOD DEATHS OCCUR IN
AUTOMOBILES.

AREA RESIDENTS SHOULD MONITOR FLOOD CONDITIONS... AND BE PREPARED
TO MOVE TO HIGHER GROUND... SHOULD FLOOD WATERS THREATEN. IF FLASH
FLOODING IS OBSERVED... ACT QUICKLY. MOVE TO HIGHER GROUND TO
ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN
WATER BEGINS RISING.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 18, 10:33 AM CDT	Severe Thunderstorm Warning	TSA	Sequoyah	42 min
Jun 18, 4:36 PM CDT	Severe Thunderstorm Warning	TSA	Creek	54 min
Jun 18, 4:46 PM CDT	Severe Thunderstorm Warning	TSA	Nowata, Washington	44 min
Jun 18, 5:05 PM CDT	Severe Thunderstorm Warning	TSA	Tulsa	55 min
Jun 18, 5:27 PM CDT	Tornado Warning	TSA	Creek, Tulsa	48 min
Jun 18, 5:30 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Nowata	45 min
Jun 18, 5:47 PM CDT	Flash Flood Warning	TSA	Creek, Tulsa	103 min
Jun 18, 5:57 PM CDT	Severe Thunderstorm Warning	TSA	Okfuskee	63 min
Jun 18, 6:09 PM CDT	Severe Thunderstorm Warning	TSA	Wagoner	36 min
Jun 18, 6:15 PM CDT	Severe Thunderstorm Warning	TSA	Tulsa	45 min
Jun 18, 6:22 PM CDT	Severe Thunderstorm Warning	TSA	Muskogee, Okmulgee	53 min
Jun 18, 6:38 PM CDT	Tornado Warning	TSA	Muskogee, Wagoner	37 min
Jun 18, 6:50 PM CDT	Severe Thunderstorm Warning	TSA	Okfuskee, Okmulgee	55 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; radar from the NEXRAD Level II archive.