Alert archive / Oklahoma / Flash Flood Warnings in 2002

Flash Flood Warning 43, NWS Tulsa, OK

June 12, 2002Osage County, Oklahoma

NWS Tulsa, OK issued this flash flood warning at Jun 12, 2002, 7:38 PM CDT for Osage County, Oklahoma. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jun 12, 2002, 7:38 PM CDT (00:38 UTC)
Expired: Jun 12, 2002, 10:30 PM CDT
In force: 3 hr
Issued by: NWS Tulsa, OK
Area: Counties, with a storm outline in the text

County Osage County, OK

The radar

The Vance AFB radar (KVNX), 105 km from the middle of the area, began a volume at 00:41 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

Lamont, OK (KLMN), launched 00:00Z, 0.6 hours before the alert went out and 47 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: 1711 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 1397 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 44 m²/s²
0-3 km storm-relative helicity: 137 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 6.2

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KTSA 130038
FFWTUL
OKC113-130330-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TULSA OK
738 PM CDT WED JUN 12 2002

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* FLASH FLOOD WARNING FOR
  WESTERN OSAGE COUNTY IN NORTHEAST OKLAHOMA

* UNTIL 1030 PM CDT

* AT 735 PM CDT RADAR INDICATED THUNDERSTORMS WITH VERY HEAVY RAIN 
  OVER FAR WESTERN OSAGE COUNTY.  RADAR ESTIMATES INDICATED RAINFALL 
  AMOUNTS OF 1 TO 3 INCHES HAVE ALREADY FALLEN OVER THE WARNED AREA  
  WITH ADDITIONAL RAIN EXPECTED. 

* LOCATIONS AFFECTED WILL BE MAINLY OVER THE FAR WESTERN PART OF 
OSAGE   COUNTY WEST OF BURBANK AND APPERSON TO THE COUNTY LINE.


DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER MAY BE TOO DEEP TO ALLOW YOUR CAR TO CROSS SAFELY.
VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY. MOVE TO
HIGHER GROUND.

LAT...LON 3673 9710 3655 9710 3657 9675 3677 9672

1 follow-up statement

000 
WGUS74 KTSA 130210
FFSTUL
OKC113-130300-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
909 PM CDT WED JUN 12 2002

...FLASH FLOOD WARNING CONTINUES FOR OSAGE COUNTY UNTIL 1030 PM
   CDT...

AT 905 PM CDT...RADAR CONTINUED TO SHOW THUNDERSTORMS WITH VERY HEAVY
RAIN OVER MUCH OF OSAGE COUNTY.

RADAR INDICATES THAT 3-4 INCHES OF RAIN HAS ALREADY FALLEN OVER 
EXTREME WESTERN OSAGE COUNTY...JUST ACROSS THE RIVER FROM PONCA 
CITY.  PEOPLE TRAVELING ON U.S. HIGHWAY 60 AND STATE HIGHWAY 18...IN 
WESTERN OSAGE COUNTY SHOULD WATCH FOR FLOODED AREAS.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED ACT
QUICKLY. MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY
IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

LAT...LON 3651 9701 3646 9691 3655 9679 3645 9669
          3641 9654 3677 9681 3671 9706

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 12, 7:17 PM CDT	Severe Thunderstorm Warning	TSA	Osage	58 min
Jun 12, 8:03 PM CDT	Severe Thunderstorm Warning	TSA	Pawnee	57 min
Jun 12, 8:15 PM CDT	Severe Thunderstorm Warning	TSA	Osage	45 min
Jun 12, 10:12 PM CDT	Severe Thunderstorm Warning	TSA	Tulsa	48 min
Jun 13, 1:41 PM CDT	Severe Thunderstorm Warning	TSA	Pittsburg	49 min
Jun 13, 2:43 PM CDT	Severe Thunderstorm Warning	TSA	Choctaw, Pushmataha	62 min

Nearby

Flash Flood Warnings in Oklahoma, 2002 Every flash flood warning in 2002

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.