Alert archive / Oklahoma / Flash Flood Warnings in 1999
Flash Flood Warning 11, NWS Tulsa, OK
NWS Tulsa, OK issued this flash flood warning at Apr 22, 1999, 8:33 PM CDT for Muskogee 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, 8:33 PM CDT (01:33 UTC)
- Expired
- Apr 22, 1999, 11:30 PM CDT
- In force
- 3 hr
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Muskogee County, OK
The nearest sounding before it
Norman, OK (KOUN), launched 00:00Z, 1.6 hours before the alert went out and 144 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.
- Mixed-layer CAPE
- 693 J/kg
- Mixed-layer CIN
- -28 J/kg
- Mixed-layer LCL
- 1920 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 82 m²/s²
- 0-3 km storm-relative helicity
- 212 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.2
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KTSA 230137
FFWTUL
OKC101-107-111-230430-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TULSA OK
833 PM CDT THU APR 22 1999
THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
* FLASH FLOOD WARNING FOR
NORTHERN MUSKOGEE COUNTY IN EAST CENTRAL OKLAHOMA
SOUTHERN OKFUSKEE COUNTY IN EAST CENTRAL OKLAHOMA
SOUTHERN OKMULGEE COUNTY IN NORTHEAST OKLAHOMA
* UNTIL 1130 PM CDT
* AT 833 PM CDT RADAR INDICATED THUNDERSTORMS WITH VERY HEAVY RAIN
ALONG A LINE EXTENDING FROM 5 MILES EAST OF MUSKOGEE TO 3 MILES
EAST OF DEWAR TO 3 MILES SOUTHEAST OF BEARDEN..MOVING EAST AT 30
MPH.
TWO TO THREE INCHES OF RAIN HAS FALLEN IN THE WARNED AREA AND 1 TO 2
INCHES MORE RAIN MAY FALL CAUSING FLASH FLOODING.
A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
IMMINENT. MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT
ATTEMPT TO CROSS BRIDGES...DIPS...OR OTHER LOW SPOTS IF WATER COVERS
THE ROADWAY. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL
ONE...ON FOOT. TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND.
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.
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER MAY BE TOO DEEP TO ALLOW YOUR CAR TO CR~OSS SAFELY.
VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY. MOVE TO
HIGHER GROUND.
LAT...LON 3565 9594 3541 9648 3531 9641 3548 9581
3572 9516 3583 9538What 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, 43 minutes earlier.
Area forecast discussion, Apr 22, 7:50 PM CDT, 43 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, 4 hours 3 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 NOWATASpecial weather statement, Apr 22, 7:43 PM CDT, 50 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, 50 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, 48 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, 48 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.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 22, 7:06 PM CDT | Tornado Warning | TSA | Cherokee, Wagoner | 54 min |
| Apr 22, 7:10 PM CDT | Severe Thunderstorm Warning | TSA | Muskogee, Okmulgee | 35 min |
| Apr 22, 7:39 PM CDT | Severe Thunderstorm Warning | TSA | Muskogee | 51 min |
| Apr 22, 7:50 PM CDT | Severe Thunderstorm Warning | TSA | McIntosh, Okmulgee | 40 min |
| Apr 22, 7:55 PM CDT | Flash Flood Warning | TSA | Cherokee | 3 hr |
| Apr 22, 7:58 PM CDT | Severe Thunderstorm Warning | TSA | Adair, Cherokee | 47 min |
| Apr 22, 8:16 PM CDT | Severe Thunderstorm Warning | TSA | Okfuskee, Okmulgee | 29 min |
| Apr 22, 8:28 PM CDT | Severe Thunderstorm Warning | TSA | McIntosh, Muskogee | 47 min |
| Apr 22, 8:33 PM CDT | Flash Flood Warning | TSA | Okfuskee, Okmulgee | 3 hr |
| Apr 22, 8:44 PM CDT | Severe Thunderstorm Warning | TSA | Adair | 46 min |
| Apr 22, 9:02 PM CDT | Severe Thunderstorm Warning | TSA | Cherokee | 28 min |
| Apr 22, 9:27 PM CDT | Severe Thunderstorm Warning | TSA | Adair, Cherokee, Sequoyah | 33 min |
| Apr 22, 9:29 PM CDT | Severe Thunderstorm Warning | TSA | McIntosh, Okfuskee | 46 min |
| Apr 22, 10:02 PM CDT | Severe Thunderstorm Warning | TSA | Sequoyah | 43 min |
| Apr 22, 10:10 PM CDT | Severe Thunderstorm Warning | TSA | McIntosh, Pittsburg | 50 min |
| Apr 22, 10:41 PM CDT | Flash Flood Warning | TSA | McIntosh | 64 min |
| Apr 22, 11:23 PM CDT | Severe Thunderstorm Warning | TSA | Pittsburg | 37 min |
| Apr 23, 12:26 AM CDT | Severe Thunderstorm Warning | TSA | Haskell | 34 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.