Alert archive / Oklahoma / Flash Flood Warnings in 1998

Flash Flood Warning 21, NWS Norman, OK

June 9, 1998Murray County, Oklahoma

NWS Norman, OK issued this flash flood warning at Jun 9, 1998, 7:09 PM CDT for Murray 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 outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued
Jun 9, 1998, 7:09 PM CDT (00:09 UTC)
Expired
Jun 9, 1998, 9:15 PM CDT
In force
2 hr
Issued by
NWS Norman, OK
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Murray County, OK

The radar

The Norman radar (KTLX), 91 km from the middle of the area, began a volume at 00:11 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 00:00Z, 0.2 hours before the alert went out and 81 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 1998-06-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3007 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 1998-06-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 41 square meters per square second.1939587897117Sfc1 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
3007 J/kg
Mixed-layer CIN
-17 J/kg
Mixed-layer LCL
1503 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
41 m²/s²
0-3 km storm-relative helicity
122 m²/s²
Significant tornado parameter
0.7
Supercell composite
6.8

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KOKC 100014
FFWOKC
OKC099-100215-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NORMAN OK
709 PM CDT TUE JUN 9 1998

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
     MURRAY COUNTY IN SOUTHEAST OKLAHOMA

* UNTIL 915 PM CDT

* PERSISTENT THUNDERSTORMS IN THE ARBUCKLES HAVE RESULTED IN 
RADAR-ESTIMATED RAINFALL OF 2 TO 3 INCHES BETWEEN 530 AND 7 PM. 
ADDITIONAL HEAVY THUNDERSTORMS IN AND APPROACHING THE AREA WILL 
RESULT IN SEVERE RUNOFF AND LOCAL FLASH FLOODING IN LOW LYING PARTS 
OF THE ARBUCKLE MOUNTAIN AREA.

* LOCATIONS IN THE WARNING INCLUDE SULPHUR... DRAKE... DAVIS... AND 
THE TURNER FALLS AREA.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR VEHICLE TO
CROSS SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED.

LAT...LON 3467 9695 3453 9714 3450 9732 3441 9736
          3439 9691

24

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 9, 7:15 PM CDTSevere Thunderstorm WarningOUNTillman45 min
Jun 9, 7:31 PM CDTSevere Thunderstorm WarningOUNCarter, Johnston, Love, Marshall44 min
Jun 9, 7:31 PM CDTSevere Thunderstorm WarningOUNPontotoc44 min
Jun 9, 7:58 PM CDTSevere Thunderstorm WarningOUNCoal47 min
Jun 9, 8:06 PM CDTSevere Thunderstorm WarningOUNAtoka, Bryan39 min
Jun 9, 8:09 PM CDTSevere Thunderstorm WarningOUNLove51 min
Jun 9, 8:43 PM CDTSevere Thunderstorm WarningOUNAtoka, Coal47 min
Jun 9, 8:43 PM CDTSevere Thunderstorm WarningOUNBryan47 min
Jun 9, 8:44 PM CDTSevere Thunderstorm WarningOUNTillman46 min
Jun 9, 8:55 PM CDTSevere Thunderstorm WarningOUNComanche, Cotton, Tillman50 min
Jun 9, 9:41 PM CDTSevere Thunderstorm WarningOUNComanche, Cotton, Stephens34 min
Jun 9, 10:02 PM CDTSevere Thunderstorm WarningOUNComanche, Kiowa43 min
Jun 9, 10:15 PM CDTSevere Thunderstorm WarningOUNStephens45 min
Jun 9, 10:44 PM CDTSevere Thunderstorm WarningOUNComanche46 min
Jun 9, 10:54 PM CDTSevere Thunderstorm WarningOUNCarter, Garvin, Stephens51 min
Jun 9, 11:14 PM CDTSevere Thunderstorm WarningOUNMurray31 min
Jun 9, 11:18 PM CDTFlash Flood WarningOUNMurray87 min
Jun 9, 11:46 PM CDTSevere Thunderstorm WarningOUNGarvin, Stephens44 min
Jun 9, 11:49 PM CDTSevere Thunderstorm WarningOUNJohnston, Murray, Pontotoc41 min
Jun 10, 12:05 AM CDTSevere Thunderstorm WarningOUNCaddo, Kiowa, Washita40 min
Jun 10, 12:47 AM CDTSevere Thunderstorm WarningOUNCoal28 min
Jun 10, 1:18 AM CDTSevere Thunderstorm WarningOUNAtoka27 min
Jun 10, 2:12 PM CDTSevere Thunderstorm WarningOUNCarter, Johnston, Marshall48 min
Jun 10, 2:43 PM CDTSevere Thunderstorm WarningOUNJohnston, Murray, Pontotoc47 min
Jun 10, 3:30 PM CDTSevere Thunderstorm WarningOUNSeminole45 min
Jun 10, 6:15 PM CDTSevere Thunderstorm WarningOUNGarfield45 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; radar from the NEXRAD Level II archive.