Alert archive / Oklahoma / Flash Flood Warnings in 1999

Flash Flood Warning 9, NWS Tulsa, OK

April 22, 1999Cherokee County, Oklahoma

NWS Tulsa, OK issued this flash flood warning at Apr 22, 1999, 7:55 PM CDT for Cherokee 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 the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued
Apr 22, 1999, 7:55 PM CDT (00:55 UTC)
Expired
Apr 22, 1999, 11:00 PM CDT
In force
3 hr
Issued by
NWS Tulsa, OK
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Cherokee County, OK

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 0.9 hours before the alert went out and 152 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, Springfield, MO at 00:00Z on 1999-04-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 316 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, Springfield, MO at 00:00Z on 1999-04-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 326 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
316 J/kg
Mixed-layer CIN
-172 J/kg
Mixed-layer LCL
823 m above ground
0-6 km bulk shear
61 kt
0-1 km storm-relative helicity
326 m²/s²
0-3 km storm-relative helicity
336 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.8

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KTSA 230059
FFWTUL
OKC021-230400-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TULSA OK
755 PM CDT THU APR 22 1999

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* FLASH FLOOD WARNING FOR
  CHEROKEE COUNTY IN OKLAHOMA

* UNTIL 1100 PM CDT

* AT 755 PM CDT RADAR INDICATED SEVERES THUNDERSTORMS WITH VERY 
HEAVY RAIN ACROSS MUCH OF NORTHERN CHEROKEE COUNTY.  RADAR ESTIMATES 
RAINFALL RATES OF 2 TO 3 INCHES HAS ALREADY FALLEN ACROSS NORTHERN 
CHEROKEE COUNTY AND ADDITIONAL AMOUNTS OF UP TO 2 INCHES MAY BE 
POSSIBLE THROUGH 10 PM.  THESE STORMS ARE MOVING EAST-SOUTHEAST AT 
20 MPH.

SCRAPER...PEGGS...HULBERT AND TAHLEQUAH AND ADJACENT COMMUNITIES MAY
BE AFFECTED BY FLASH FLOODING.

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 3606 9517 3588 9524 3576 9485 3616 9485

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 Apr 22, 7:50 PM CDT, 5 minutes earlier.

Area forecast discussion, Apr 22, 7:50 PM CDT, 5 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
750 PM CDT THU APR 22 1999

LINE OF SEVERE STORMS CONTINUES TO PUSH SE ALONG SURFACE BOUNDARY.
DONT EXPECT LINE TO CONTINUE TO PUSH SOUTH AND SHOULD HANG UP
AFTER DARK. THREAT FOR FLOODING MAY DEVELOP IF STORMS DO NOT
DIE WITH HEATING. WILL COUNT ON STORMS DIMINISHING FOR NOW AND
TWEAK POPS UP A FEW COUNTIES AHEAD OF CURRENT PRECIP. WILL DROP
POPS OR REWORD TO LATE TONIGHT FOR POSSIBLE REDEVELOPMENT NORTH
OF ONGOING PRECIP. BOUNDARY EXPECTED TO STALL WITH VERY MOIST
AIR SET TO OVERRUN IT.

UPDATED ZONES TO ADJUST TORNADO WATCH HEADLINES AS WELL. ANOTHER
UPDATE LATER THIS EVE.
/13
AR...NONE.
OK...NONE.

In the hours before

Local storm report, Apr 22, 4:30 PM CDT, 3 hours 25 minutes before
PRELIMINARY LOCAL STORM REPORT...CORRECTED 2ND REPORT
NATIONAL WEATHER SERVICE TULSA OK
430 PM CDT THU APR 22 1999

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0415 PM    2 E LENAPAH                OK  2.75 INCH HAIL
04/22/99   NOWATA
Special weather statement, Apr 22, 7:43 PM CDT, 12 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-231100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
743 PM CDT THU APR 22 1999

TORNADO WATCH 166 REMAINS IN EFFECT UNTIL 9PM FOR THE FOLLOWING
COUNTIES:

IN NORTHEAST OKLAHOMA
OKMULGEE...MUSKOGEE...WAGONER...CHEROKEE...ADAIR...DELAWARE AND MAYES

IN NORTHWEST ARKANSAS
BENTON...WASHINGTON AND CRAWFORD

THE TORNADO WATCH HAS BEEN CANCELED FOR THE FOLLOWING COUNTIES:

IN NORTHEAST OKLAHOMA
WASHINGTON...NOWATA...CRAIG...OTTAWA...CREEK...TULSA AND ROGERS.

AT 740 PM...RADAR INDICATED THE LINE OF STRONG TO SEVERE THUNDERSTORMS
HAD MOVED SOUTHEASTWARD INTO FAR NORTHWEST ARKANSAS AND EASTCENTRAL
OKLAHOMA. THE THREAT FOR SEVERE STORMS AND TORNADOES WILL CONTINUE
UNTIL 9AM IN THE WATCH AREA.

IF THREATENING WEATHER APPROACHES MOVE TO SAFE SHELTER.
Special weather statement, Apr 22, 7:43 PM CDT, 12 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-231100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
743 PM CDT THU APR 22 1999

TORNADO WATCH 166 REMAINS IN EFFECT UNTIL 9PM FOR THE FOLLOWING
COUNTIES:

IN NORTHEAST OKLAHOMA
OKMULGEE...MUSKOGEE...WAGONER...CHEROKEE...ADAIR...DELAWARE AND MAYES

IN NORTHWEST ARKANSAS
BENTON...WASHINGTON AND CRAWFORD

THE TORNADO WATCH HAS BEEN CANCELED FOR THE FOLLOWING COUNTIES:

IN NORTHEAST OKLAHOMA
WASHINGTON...NOWATA...CRAIG...OTTAWA...CREEK...TULSA AND ROGERS.

AT 740 PM...RADAR INDICATED THE LINE OF STRONG TO SEVERE THUNDERSTORMS
HAD MOVED SOUTHEASTWARD INTO FAR NORTHWEST ARKANSAS AND EASTCENTRAL
OKLAHOMA. THE THREAT FOR SEVERE STORMS AND TORNADOES WILL CONTINUE
UNTIL 9AM IN THE WATCH AREA.

IF THREATENING WEATHER APPROACHES MOVE TO SAFE SHELTER.
Special weather statement, Apr 22, 7:45 PM CDT, 10 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-230200-

SPECIAL WEATHER STATEMENT...CORRECTED TIMES AND EXPIRATION
NATIONAL WEATHER SERVICE TULSA OK
745 PM CDT THU APR 22 1999

TORNADO WATCH 166 REMAINS IN EFFECT UNTIL 9PM FOR THE FOLLOWING
COUNTIES:

IN NORTHEAST OKLAHOMA
OKMULGEE...MUSKOGEE...WAGONER...CHEROKEE...ADAIR...DELAWARE AND MAYES

IN NORTHWEST ARKANSAS
BENTON...WASHINGTON AND CRAWFORD

THE TORNADO WATCH HAS BEEN CANCELED FOR THE FOLLOWING COUNTIES:

IN NORTHEAST OKLAHOMA
WASHINGTON...NOWATA...CRAIG...OTTAWA...CREEK...TULSA AND ROGERS.

AT 740 PM...RADAR INDICATED THE LINE OF STRONG TO SEVERE THUNDERSTORMS
HAD MOVED SOUTHEASTWARD INTO FAR NORTHWEST ARKANSAS AND EASTCENTRAL
OKLAHOMA. THE THREAT FOR SEVERE STORMS AND TORNADOES WILL CONTINUE
UNTIL 9PM IN THE WATCH AREA.

IF THREATENING WEATHER APPROACHES MOVE TO SAFE SHELTER.
Special weather statement, Apr 22, 7:45 PM CDT, 10 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-230200-

SPECIAL WEATHER STATEMENT...CORRECTED TIMES AND EXPIRATION
NATIONAL WEATHER SERVICE TULSA OK
745 PM CDT THU APR 22 1999

TORNADO WATCH 166 REMAINS IN EFFECT UNTIL 9PM FOR THE FOLLOWING
COUNTIES:

IN NORTHEAST OKLAHOMA
OKMULGEE...MUSKOGEE...WAGONER...CHEROKEE...ADAIR...DELAWARE AND MAYES

IN NORTHWEST ARKANSAS
BENTON...WASHINGTON AND CRAWFORD

THE TORNADO WATCH HAS BEEN CANCELED FOR THE FOLLOWING COUNTIES:

IN NORTHEAST OKLAHOMA
WASHINGTON...NOWATA...CRAIG...OTTAWA...CREEK...TULSA AND ROGERS.

AT 740 PM...RADAR INDICATED THE LINE OF STRONG TO SEVERE THUNDERSTORMS
HAD MOVED SOUTHEASTWARD INTO FAR NORTHWEST ARKANSAS AND EASTCENTRAL
OKLAHOMA. THE THREAT FOR SEVERE STORMS AND TORNADOES WILL CONTINUE
UNTIL 9PM IN THE WATCH AREA.

IF THREATENING WEATHER APPROACHES MOVE TO SAFE SHELTER.

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 22, 7:06 PM CDTTornado WarningTSACherokee, Wagoner54 min
Apr 22, 7:10 PM CDTSevere Thunderstorm WarningTSAMuskogee, Okmulgee35 min
Apr 22, 7:39 PM CDTSevere Thunderstorm WarningTSAMuskogee51 min
Apr 22, 7:50 PM CDTSevere Thunderstorm WarningTSAMcIntosh, Okmulgee40 min
Apr 22, 7:58 PM CDTSevere Thunderstorm WarningTSAAdair, Cherokee47 min
Apr 22, 8:16 PM CDTSevere Thunderstorm WarningTSAOkfuskee, Okmulgee29 min
Apr 22, 8:28 PM CDTSevere Thunderstorm WarningTSAMcIntosh, Muskogee47 min
Apr 22, 8:33 PM CDTFlash Flood WarningTSAOkfuskee, Okmulgee3 hr
Apr 22, 8:33 PM CDTFlash Flood WarningTSAMuskogee3 hr
Apr 22, 8:44 PM CDTSevere Thunderstorm WarningTSAAdair46 min
Apr 22, 9:02 PM CDTSevere Thunderstorm WarningTSACherokee28 min
Apr 22, 9:27 PM CDTSevere Thunderstorm WarningTSAAdair, Cherokee, Sequoyah33 min
Apr 22, 9:29 PM CDTSevere Thunderstorm WarningTSAMcIntosh, Okfuskee46 min
Apr 22, 10:02 PM CDTSevere Thunderstorm WarningTSASequoyah43 min
Apr 22, 10:10 PM CDTSevere Thunderstorm WarningTSAMcIntosh, Pittsburg50 min
Apr 22, 10:41 PM CDTFlash Flood WarningTSAMcIntosh64 min
Apr 22, 11:23 PM CDTSevere Thunderstorm WarningTSAPittsburg37 min
Apr 23, 12:26 AM CDTSevere Thunderstorm WarningTSAHaskell34 min

Nearby

Flash Flood Warnings in Oklahoma, 1999Every flash flood warning in 1999

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.