Alert archive / Oklahoma / Flash Flood Warnings in 1999
Flash Flood Warning 85, NWS Tulsa, OK
NWS Tulsa, OK issued this flash flood warning at Jul 7, 1999, 3:08 PM CDT for Mayes County, Rogers 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
- Jul 7, 1999, 3:08 PM CDT (20:08 UTC)
- Expired
- Jul 7, 1999, 5:15 PM CDT
- In force
- 2 hr
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Mayes County, OK, Rogers County, OK
The radar
The Tulsa radar (KINX), 11 km from the middle of the area, began a volume at 20:08 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
Springfield, MO (KSGF), launched 12:00Z, 8.1 hours before the alert went out and 166 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
- 1053 J/kg
- Mixed-layer CIN
- -76 J/kg
- Mixed-layer LCL
- 748 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- 20 m²/s²
- 0-3 km storm-relative helicity
- 35 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KTUL 072012 FFWTUL OKC097-131-072215- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE TULSA OK 308 PM CDT WED JUL 7 1999 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * FLASH FLOOD WARNING FOR SOUTHERN MAYES COUNTY IN NORTHEAST OKLAHOMA SOUTHERN ROGERS COUNTY IN NORTHEAST OKLAHOMA * UNTIL 515 PM CDT * AT 308 PM CDT RADAR INDICATED THUNDERSTORMS WITH VERY HEAVY RAIN 3 MILES WEST OF CHOUTEAU...MOVING SLOWLY WEST. RADAR INDICATED THAT AN ESTIMATED 3 TO 4 INCHES OF RAIN HAS FALLEN OVER PORTIONS OF SOUTHERN MAYES AND SOUTHEASTERN ROGERS COUNTIES. DUE TO THE SLOW MOVEMENT OF THE STORMS...ADDITONAL HEAVY RAINS WILL BE POSSIBLE OVER THE NEXT HOUR. CHOUTEAU...PRYOR AND TIAWAH AND ADJACENT COMMUNITIES MAY BE AFFECTED BY 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. 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 3619 9562 3608 9533 3630 9516 3639 9559
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 Jul 7, 11:02 AM CDT, 4 hours 6 minutes earlier.
Area forecast discussion, Jul 7, 11:02 AM CDT, 4 hours 6 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 1102 AM CDT WED JUL 7 1999 WEAK COLD FRONT TO THE NORTH HAS STALLED FROM WESTERN KENTUCKY...ACROSS EXTREME SOUTHERN MISSOURI AND INTO SOUTHEAST KANSAS. THE FRONT SHOULD MOVE LITTLE THE REST OF TODAY. MORNING SOUNDINGS AROUND THE AREA SHOW THAT THE CONVECTIVE TEMPERATURE WILL BE REACHED AGAIN THIS AFTERNOON...SO THAT ISOLATED SHOWERS AND THUNDERSTORMS WILL OCCUR AGAIN TODAY...WITH THE MOST NUMEROUS CELLS IN THE HIGHER TERRAIN IN SOUTHEAST OKLAHOMA AND WESTERN ARKANSAS. IN ADDITION...MOISTURE CONVERGENCE WAS OCCURRING ALONG THE STALLED FRONT AT MID MORNING NEAR THE MISSOURI AND ARKANSAS BORDERS AND THIS FRONT WILL LIKELY ALSO BE THE FOCUS FOR ISOLATED DEVELOPMENT. IT WAS NOTED TODAY THAT LOW-LEVEL MOISTURE WAS A LITTLE DEEPER THAN 24 HOURS AGO...RESULTING IN FORECAST CAPES AROUND 2000 J/KG LATER TODAY. WITH A SLIGHTLY LOWER WET-BULB ZERO TODAY A STORM OR TWO COULD BRIEFLY PULSE TO NEAR SEVERE LEVELS. TEMPERATURES TODAY ARE AVERAGING OUT ABOUT AS YESTERDAY...EXCEPT IN FAR NORTHEAST SECTIONS OF THE FORECAST AREA...HARRISON AR IS RUNNING 5 DEGREES OFF YESTERDAYS PACE. ALL OF THIS COVERED IN THE GOING FORECAST AND WILL NOT MAKE ANY CHANGES TO THE ZONES AT THIS TIME. FCSTID = 8 .TUL... AR...NONE. OK...NONE.
In the hours before
Special weather statement, Jul 7, 12:50 PM CDT, 2 hours 18 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-081100- EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 1250 PM CDT WED JUL 7 1999 ISOLATED SEVERE THUNDERSTORMS ARE EXPECTED THIS AFTERNOON AND EARLY THIS EVENING. .SYNOPSIS... HIGH PRESSURE ALOFT WILL REMAIN ANCHORED OVER THE CENTRAL PART OF THE NATION THROUGH TONIGHT. .DISCUSSION... STRONG SURFACE HEATING HAS RESULTED IN A MODERATELY UNSTABLE AIR MASS ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS. THIS COMBINED WITH A WEAK CAP WILL ALLOW WIDELY SCATTERED SHOWERS AND THUNDERSTORMS TO OCCUR ACROSS THE AREA THIS AFTERNOON AND EVENING. GIVEN THE AMOUNT OF INSTABILITY AND WEAK WINDS ALOFT A STORM OR TWO MAY BRIEFLY BECOME SEVERE WITH LARGE HAIL AND STRONG GUSTY WINDS. LOCALLY HEAVY RAINS WILL ALSO BE POSSIBLE. .EMERGENCY MANAGEMENT AGENCY AND SPOTTER ACTIVATION... STORM SPOTTER ACTIVATION IS NOT ANTICIPATED DUE TO THE BRIEF NATURE THE SEVERE WEATHER EXPECTED THIS AFTERNOON AND EVENING.
Special weather statement, Jul 7, 12:50 PM CDT, 2 hours 18 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-081100- EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 1250 PM CDT WED JUL 7 1999 ISOLATED SEVERE THUNDERSTORMS ARE EXPECTED THIS AFTERNOON AND EARLY THIS EVENING. .SYNOPSIS... HIGH PRESSURE ALOFT WILL REMAIN ANCHORED OVER THE CENTRAL PART OF THE NATION THROUGH TONIGHT. .DISCUSSION... STRONG SURFACE HEATING HAS RESULTED IN A MODERATELY UNSTABLE AIR MASS ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS. THIS COMBINED WITH A WEAK CAP WILL ALLOW WIDELY SCATTERED SHOWERS AND THUNDERSTORMS TO OCCUR ACROSS THE AREA THIS AFTERNOON AND EVENING. GIVEN THE AMOUNT OF INSTABILITY AND WEAK WINDS ALOFT A STORM OR TWO MAY BRIEFLY BECOME SEVERE WITH LARGE HAIL AND STRONG GUSTY WINDS. LOCALLY HEAVY RAINS WILL ALSO BE POSSIBLE. .EMERGENCY MANAGEMENT AGENCY AND SPOTTER ACTIVATION... STORM SPOTTER ACTIVATION IS NOT ANTICIPATED DUE TO THE BRIEF NATURE THE SEVERE WEATHER EXPECTED THIS AFTERNOON AND EVENING.
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 7, 12:32 PM CDT | Severe Thunderstorm Warning | TSA | Sequoyah | 43 min |
| Jul 7, 1:53 PM CDT | Severe Thunderstorm Warning | TSA | Cherokee | 52 min |
| Jul 7, 2:48 PM CDT | Severe Thunderstorm Warning | TSA | Mayes, Rogers | 42 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; radar from the NEXRAD Level II archive.