Alert archive / Oklahoma / Flash Flood Warnings in 1999
Flash Flood Warning 73, NWS Tulsa, OK
NWS Tulsa, OK issued this flash flood warning at Jun 24, 1999, 3:36 PM CDT for Sequoyah County, Oklahoma. It was in force for 114 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
- Jun 24, 1999, 3:36 PM CDT (20:36 UTC)
- Expired
- Jun 24, 1999, 5:30 PM CDT
- In force
- 114 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Sequoyah County, OK
The radar
The Western Arkansas radar (KSRX), 46 km from the middle of the area, began a volume at 20:37 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, 8.6 hours before the alert went out and 178 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
- 481 J/kg
- Mixed-layer CIN
- -111 J/kg
- Mixed-layer LCL
- 903 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 58 m²/s²
- 0-3 km storm-relative helicity
- 92 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KTUL 242039 FFWTUL OKC135-242230- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE TULSA OK 336 PM CDT THU JUN 24 1999 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * FLASH FLOOD WARNING FOR SEQUOYAH COUNTY IN EAST CENTRAL OKLAHOMA * UNTIL 530 PM CDT * AT 336 PM CDT RADAR INDICATED THUNDERSTORMS NEAR MULDROW. THESE STORMS HAVE BEEN NEARLY STATIONARY AND HAVE PRODUCED OVER 2 INCHES OF RAIN. ANY ADDITIONAL RAINFALL WILL CAUSE FLASH FLOODING. MOFFETT...MARBLE CITY...SHORT...BRUSHY...ROLAND...MULDROW AND SALLISAW 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 3564 9497 3540 9477 3538 9445 3566 9451
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 Jun 24, 3:35 PM CDT, 1 minute earlier.
Area forecast discussion, Jun 24, 3:35 PM CDT, 1 minute before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 335 PM CDT THU JUN 24 1999 PROBLEM(S) OF THE DAY: WILL THERE BE ANY FLOODING? WILL THERE BE HEAVY RAINFALL? HOW MUCH RAIN WILL FALL? STRONG TO SEVERE THUNDERSTORMS WILL CONTINUE TO MOVE SOUTHEAST ALONG THE OUTFLOW BOUNDARY FROM THIS MORNINGS CONVECTION. THIS COMPLEX IS MOVING INTO A MORE UNSTABLE AIRMASS. STORMS APPEAR TO BE TRAINING ALONG SOUTHERN EDGE OF BOUNDARY AND WILL ISSUE A FLASH FLOOD WATCH MAINLY FOR AREAS ALONG INTERSTATE 40 THROUGH MIDNIGHT. THESE STORMS HAVE ALREADY PRODUCED LOCALIZED RAINFALL TOTALS OF CLOSE TO AN INCH AND STREET FLOODING HAS BEEN REPORTED IN FORT SMITH. MAY MAKE ADJUSTMENTS TO WATCH BOXES JUST BEFORE ISSUANCE TO REFLECT CURRENT TRENDS. MODELS ARE IN FAIRLY GOOD AGREEMENT THROUGH 48 HOURS. AN UPPER LEVEL LOW AND ASSOCIATED VORT MAX DEVELOPS LATE THIS EVENING OVER CENTRAL OKLAHOMA AND SLOWLY DRIFTS EAST INTO ARKANSAS BY SATURDAY MORNING. WILL CONTINUE A CHANCE OF SHOWERS AND THUNDERSTORMS FRIDAY WITH SLIGHT CHANCES FRIDAY NIGHT. 700 MB TEMPERATURES WARM UP OVER THE WEEKEND. WITH A STRONGER CAP IN PLACE WILL CONTINUE DRY FORECAST THROUGH TUESDAY WHEN THE NEXT SYSTEM APPROACHES FROM THE WEST. TONIGHTS LOWS SEEM TOO WARM GIVEN CURRENT TEMPERATURES...OTHERWISE GUIDANCE TEMPERATURES ARE CLOSE AND SEE NO REASON TO STRAY. FCSTID = 33 TUL 67 87 73 91 / 30 20 10 0 FSM 69 88 72 90 / 60 30 20 0 MLC 70 89 72 91 / 60 30 20 0 BVO 66 87 72 90 / 30 20 10 0 FYV 67 87 68 89 / 30 30 20 0 IDB 71 90 72 91 / 60 30 20 0 BYV 66 86 67 88 / 30 30 20 0 MIO 67 87 70 89 / 30 20 10 0 MKO 67 88 73 91 / 30 20 10 0 F10 66 89 72 91 / 30 20 10 0 HHW 70 90 72 91 / 60 30 20 0 .TUL... AR...FLASH FLOOD WATCH IN AFFECT UNTIL MIDNIGHT CDT FOR ZONES ARZ019>020...ARZ029. OK...FLASH FLOOD WATCH IN AFFECT UNTIL 600 CDT FOR ZONES OKZ054>064...OKZ067. FLASH FLOOD WATCH IN AFFECT UNTIL MIDNIGHT CDT FOR ZONES OKC072>076. -------------------- EXPERIMENTAL OUTPUT: HAZARDOUS WEATHER EXPECTED NEXT 24 HOURS: CHANCE SEVERE THUNDERSTORMS NGM CONFIDENCE: 7 ON A SCALE OF 0 TO 10 ETA CONFIDENCE: 7 ON A SCALE OF 0 TO 10 AVN CONFIDENCE: 6 ON A SCALE OF 0 TO 10 FCST CONFIDENCE: 7 ON A SCALE OF 0 TO 10
In the hours before
Local storm report, Jun 24, 2:33 PM CDT, 1 hour 3 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
233 PM CDT THU JUN 24 1999
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0231 PM FT SMITH AR .75 INCH HAIL
06/24/99 SEBASTIANLocal storm report, Jun 24, 2:33 PM CDT, 1 hour 3 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
233 PM CDT THU JUN 24 1999
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0231 PM FT SMITH AR .75 INCH HAIL
06/24/99 SEBASTIANLocal storm report, Jun 24, 2:51 PM CDT, 45 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
251 PM CDT THU JUN 24 1999
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0249 PM FT SMITH AR FLOOD
06/24/99 SEBASTIAN SEVERAL CARS UNDER
WATER NEAR 16TH AND GRANDLocal storm report, Jun 24, 2:51 PM CDT, 45 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
251 PM CDT THU JUN 24 1999
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0249 PM FT SMITH AR FLOOD
06/24/99 SEBASTIAN SEVERAL CARS UNDER
WATER NEAR 16TH AND GRANDLocal storm report, Jun 24, 3:32 PM CDT, 4 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
332 PM CDT THU JUN 24 1999
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0330 PM HEAVENER OK WIND DAMAGE
06/24/99 LE FLORE SPOTTERS REPORTED TREE
DAMAGE SOUTH OF HEAVENERLocal storm report, Jun 24, 3:32 PM CDT, 4 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
332 PM CDT THU JUN 24 1999
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0330 PM HEAVENER OK WIND DAMAGE
06/24/99 LE FLORE SPOTTERS REPORTED TREE
DAMAGE SOUTH OF HEAVENERThe office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 24, 9:26 AM CDT | Severe Thunderstorm Warning | TSA | Osage | 49 min |
| Jun 24, 11:49 AM CDT | Severe Thunderstorm Warning | TSA | Pawnee | 41 min |
| Jun 24, 1:00 PM CDT | Severe Thunderstorm Warning | TSA | Creek | 45 min |
| Jun 24, 1:14 PM CDT | Severe Thunderstorm Warning | TSA | McIntosh, Okfuskee, Okmulgee | 61 min |
| Jun 24, 1:44 PM CDT | Severe Thunderstorm Warning | TSA | Muskogee | 46 min |
| Jun 24, 3:24 PM CDT | Severe Thunderstorm Warning | TSA | LeFlore | 51 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.