Alert archive / Oklahoma / Flash Flood Warnings in 1999
Flash Flood Warning 12, NWS Tulsa, OK
NWS Tulsa, OK issued this flash flood warning at Apr 22, 1999, 10:41 PM CDT for McIntosh County, Oklahoma. It was in force for 64 min. 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, 10:41 PM CDT (03:41 UTC)
- Expired
- Apr 22, 1999, 11:45 PM CDT
- In force
- 64 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County McIntosh County, OK
The nearest sounding before it
Norman, OK (KOUN), launched 00:00Z, 3.7 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.
- 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 230345
FFWTUL
OKC091-230445-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TULSA OK
1041 PM CDT THU APR 22 1999
THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
* FLASH FLOOD WARNING FOR
MCINTOSH COUNTY IN SOUTHEAST OKLAHOMA
* UNTIL 1145 PM CDT
* AT 1041 PM CDT RADAR INDICATED THUNDERSTORMS WITH VERY HEAVY RAIN
ALONG A LINE EXTENDING FROM 5 MILES EAST OF EUFAULA TO 5 MILES
SOUTHWEST OF EUFAULA TO 20 MILES SOUTHWEST OF RAIFORD..MOVING
EAST SOUTHEAST AT 20 MPH.
2 TO 3 INCHES OF RAIN HAVE FALLEN OVER WESTERN MCINTOSH COUNTY AND
AN ADDITIONAL 1 TO 2 INCHES MAY FALL. THIS WILL LIKELY PRODUCE
FLASH FLOODING
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 CROSS SAFELY.
VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY. MOVE TO
HIGHER GROUND.
LAT...LON 3538 9547 3540 9577 3528 9604 3520 9601
3523 9565 3534 9539What 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, 8:55 PM CDT, 1 hour 46 minutes earlier.
Area forecast discussion, Apr 22, 8:55 PM CDT, 1 hour 46 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 855 PM CDT THU APR 22 1999 LINE HAS SLOWED ITS SOUTHWARD PROGRESSION AND STORMS MAY BE ON A WEAKENING TREND. UPDATED ZONES TO ADJUST POPS AND HEADLINES FOR SEVERE WATCH. CONSIDERED FLASH FLOOD WATCH...BUT WARNINGS ALREADY BEING ISSUED AND HEAVY RAIN THREAT MAY DIMINISH IN NEXT HOUR OR SO... BUT DID MENTION HEAVY RAINS IN ZONES FROM EC OK INTO NW ARK. /13 /13 AR...NONE. OK...NONE.
In the hours before
Special weather statement, Apr 22, 7:45 PM CDT, 2 hours 56 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, 2 hours 56 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, 8:55 PM CDT, 1 hour 46 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-230600- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TULSA OK 855 PM CDT THU APR 22 1999 TORNADO WATCH 166 WILL BE ALLOWED TO EXPIRE AT 9PM. SEVERE THUNDERSTORM WATCH NUMBER 168 IS IN EFFECT UNTIL 1AM FOR THE FOLLOW COUNTIES: IN EASTERN OKLAHOMA... ADAIR...CHEROKEE...MCINTOSH...MUSKOGEE...OKFUSKEE... OKMULGEE...SEQUOYAH...PITTSBURG...HASKELL...LATIMER AND LE FLORE. IN NORTHWEST ARKANSAS... BENTON...MADISON...CARROLL...CRAWFORD...WASHINGTON...FRANKLIN AND SEBASTIAN. A LINE OF STRONG TO SEVERE THUNDERSTORMS WILL CONTINUE TO SLOWLY SAG SOUTHWARD THROUGH NORTHWEST ARKANSAS AND EASTCENTRAL OKLAHOMA. LARGE HAIL AND DAMAGING WINDS WILL BE POSSIBLE WITH THE STORMS IN THE WATCH AREA. IF THREATENING WEATHER APPROACHES MOVE TO SAFE SHELTER.
Special weather statement, Apr 22, 8:55 PM CDT, 1 hour 46 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-230600- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TULSA OK 855 PM CDT THU APR 22 1999 TORNADO WATCH 166 WILL BE ALLOWED TO EXPIRE AT 9PM. SEVERE THUNDERSTORM WATCH NUMBER 168 IS IN EFFECT UNTIL 1AM FOR THE FOLLOW COUNTIES: IN EASTERN OKLAHOMA... ADAIR...CHEROKEE...MCINTOSH...MUSKOGEE...OKFUSKEE... OKMULGEE...SEQUOYAH...PITTSBURG...HASKELL...LATIMER AND LE FLORE. IN NORTHWEST ARKANSAS... BENTON...MADISON...CARROLL...CRAWFORD...WASHINGTON...FRANKLIN AND SEBASTIAN. A LINE OF STRONG TO SEVERE THUNDERSTORMS WILL CONTINUE TO SLOWLY SAG SOUTHWARD THROUGH NORTHWEST ARKANSAS AND EASTCENTRAL OKLAHOMA. LARGE HAIL AND DAMAGING WINDS WILL BE POSSIBLE WITH THE STORMS IN THE WATCH AREA. IF THREATENING WEATHER APPROACHES MOVE TO SAFE SHELTER.
Special weather statement, Apr 22, 9:20 PM CDT, 1 hour 21 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-231200- EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 920 PM CDT THU APR 22 1999 A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR PARTS OF SOUTHEAST OKLAHOMA AND NORTHWEST ARKANSAS UNTIL 1 AM. .SYNOPSIS... AT 920 PM...A 30 MILE WIDE BAND OF STRONG TO SEVERE THUNDERSTORMS EXTENDED FROM NEAR FAYETTEVILLE TO OKEMAH IN SOUTHERN OKFUSKEE COUNTY. THESE THUNDERSTORMS WERE ALONG A COLD FRONT THAT IS FORECAST TO SAG SLOWLY SOUTHEAST INTO PARTS OF SOUTHEAST OKLAHOMA AND WEST CENTRAL ARKANSAS THROUGH THE EARLY MORNING. .DISCUSSION... THE LINE OF THUNDERSTORMS ACROSS EAST CENTRAL OKLAHOMA AND NORTHWEST ARKANSAS IS EXPECTED TO GRADUALLY WEAKEN THROUGH 1 AM AS THEY ENCOUNTER A MORE CAPPED AIRMASS OVER SOUTHEAST OKLAHOMA AND WEST CENTRAL ARKANSAS. HOWEVER...ISOLATED SEVERE THUNDERSTORMS CAPABLE OF PRODUCING LARGE HAIL AND DAMAGING WINDS WILL BE POSSIBLE MAINLY THROUGH MIDNIGHT. FAVORABLE WIND PROFILES WILL ALSO SUPPORT THE DEVELOPMENT OF A TORNADO OR TWO...MAINLY OVER NORTHWEST ARKANSAS. IN ADDITION...DUE TO THE VERY SLOW MOVEMENT OF THIS LINE...LOCALIZED HEAVY RAINFALL AND FLASH FLOODING IS LIKELY AS THIS LINE OF THUNDERSTORMS SAGS INTO SOUTHEAST OKLAHOMA AND WEST CENTRAL ARKANSAS. .EMERGENCY MANAGEMENT AGENCY AND SPOTTER ACTIVATION... SPOTTER ACTIVATION IS IN EFFECT. HOWEVER NO SPOTTER ACTIVATION IS EXPECTED BEYOND 1 AM.
Special weather statement, Apr 22, 9:20 PM CDT, 1 hour 21 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-231200- EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 920 PM CDT THU APR 22 1999 A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR PARTS OF SOUTHEAST OKLAHOMA AND NORTHWEST ARKANSAS UNTIL 1 AM. .SYNOPSIS... AT 920 PM...A 30 MILE WIDE BAND OF STRONG TO SEVERE THUNDERSTORMS EXTENDED FROM NEAR FAYETTEVILLE TO OKEMAH IN SOUTHERN OKFUSKEE COUNTY. THESE THUNDERSTORMS WERE ALONG A COLD FRONT THAT IS FORECAST TO SAG SLOWLY SOUTHEAST INTO PARTS OF SOUTHEAST OKLAHOMA AND WEST CENTRAL ARKANSAS THROUGH THE EARLY MORNING. .DISCUSSION... THE LINE OF THUNDERSTORMS ACROSS EAST CENTRAL OKLAHOMA AND NORTHWEST ARKANSAS IS EXPECTED TO GRADUALLY WEAKEN THROUGH 1 AM AS THEY ENCOUNTER A MORE CAPPED AIRMASS OVER SOUTHEAST OKLAHOMA AND WEST CENTRAL ARKANSAS. HOWEVER...ISOLATED SEVERE THUNDERSTORMS CAPABLE OF PRODUCING LARGE HAIL AND DAMAGING WINDS WILL BE POSSIBLE MAINLY THROUGH MIDNIGHT. FAVORABLE WIND PROFILES WILL ALSO SUPPORT THE DEVELOPMENT OF A TORNADO OR TWO...MAINLY OVER NORTHWEST ARKANSAS. IN ADDITION...DUE TO THE VERY SLOW MOVEMENT OF THIS LINE...LOCALIZED HEAVY RAINFALL AND FLASH FLOODING IS LIKELY AS THIS LINE OF THUNDERSTORMS SAGS INTO SOUTHEAST OKLAHOMA AND WEST CENTRAL ARKANSAS. .EMERGENCY MANAGEMENT AGENCY AND SPOTTER ACTIVATION... SPOTTER ACTIVATION IS IN EFFECT. HOWEVER NO SPOTTER ACTIVATION IS EXPECTED BEYOND 1 AM.
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, 8:33 PM CDT | Flash Flood Warning | TSA | Muskogee | 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, 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.