Alert archive / Oklahoma / Flash Flood Warnings in 1999
Flash Flood Warning 77, NWS Tulsa, OK
NWS Tulsa, OK issued this flash flood warning at Jun 30, 1999, 4:45 AM CDT for Creek County, Okmulgee County, Tulsa 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
- Jun 30, 1999, 4:45 AM CDT (09:45 UTC)
- Expired
- Jun 30, 1999, 6:45 AM CDT
- In force
- 2 hr
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Creek County, OK, Okmulgee County, OK, Tulsa County, OK
The radar
The Tulsa radar (KINX), 61 km from the middle of the area, began a volume at 09:48 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
Norman, OK (KOUN), launched 00:00Z, 9.8 hours before the alert went out and 139 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
- 567 J/kg
- Mixed-layer CIN
- -317 J/kg
- Mixed-layer LCL
- 1460 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 119 m²/s²
- 0-3 km storm-relative helicity
- 254 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 300948 FFWTUL OKC037-111-143-301145- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE TULSA OK 445 AM CDT WED JUN 30 1999 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * FLASH FLOOD WARNING FOR CREEK COUNTY IN NORTHEAST OKLAHOMA OKMULGEE COUNTY IN NORTHEAST OKLAHOMA CENTRAL AND SOUTHERN TULSA COUNTY IN NORTHEAST OKLAHOMA * UNTIL 645 AM CDT * AT 445 AM CDT RADAR INDICATED THUNDERSTORMS WITH VERY HEAVY RAIN OVER MUCH OF NORTHERN CREEK...TULSA AND NORTHERN OKMULGEE COUNTY...MOVING SOUTHEAST AT 30 MPH. RADAR ESTIMATES THAT BETWEEN 2 TO 3 INCHES OF RAIN HAS ALREADY FALLEN OVER THESE AREAS...WITH AN ADDITIONAL 1 TO 2 INCHES POSSIBLE. SAPULPA...KELLYVILLE...MANNFORD...OILTON...DRUMRIGHT...KIEFER... SHAMROCK...MOUNDS...DEPEW...SLICK...BRISTOW...GLENPOOL...JENKS... BIXBY...BALD HILL...BEGGS AND PRESTON AND ADJACENT COMMUNITIES MAY BE AFFECTED BY 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 3611 9581 3617 9662 3565 9661 35724 9575
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 29, 9:18 PM CDT, 7 hours 27 minutes earlier.
Area forecast discussion, Jun 29, 9:18 PM CDT, 7 hours 27 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 918 PM CDT TUE JUN 29 1999 LOW / MID-LEVEL WARM AIR ADVECTION AND MID LEVEL MOISTURE HAVE COMBINED TO PRODUCE A FEW SHOWERS AND THUNDERSTORMS ALONG THE KANSAS BORDER OF NE OKLAHOMA. THIS ACTIVITY WILL PERSIST FOR A FEW HOURS BUT OVERALL TRENDS IN THE MODEL FIELDS SUGGEST ACTIVITY WILL NOT TAKE OFF INTO ANYTHING SIGNIFICANT AND MAY DISSIPATE AFTER MIDNIGHT AS THE ADVECTION PATTERN WEAKENS SOME WITH TIME. CURRENT ACTIVITY IN THE TEXAS PANHANDLE SHOULD CONTINUE TO DROP SOUTH AND SOUTHEAST ALONG THE LOW-LEVEL THETA-E AXIS AND FURTHER INTO THE LOW-LEVEL JET. IF THIS OCCURS THIS WILL LIKELY DISRUPT THE LOW-LEVEL JET FUTHER NORTH AND BE A NEGATIVE FACTOR FOR EXCESSIVE RAINS IN OUR FORECAST AREA. OF MOST CONCERN IS ACTIVITY NOW RAPIDLY DEVELOPING IN SOUTHWEST KANSAS. AT THIS TIME IT APPEARS THAT THESE STORMS WILL BEGIN TO ACCELERATE SOUTHEAST IN THE MODERATE MID-LEVEL FLOW AND THESE STORMS WILL HAVE THE POTENTIAL TO PRODUCE DAMAGING WINDS AS THEY APPROACH OUR FORECAST AREA AFTER 06Z GIVEN THE CURRENT LAPSE RATES AND VERTICAL SHEAR PROFILE. THE SPEED OF MOVEMENT SUGGESTS A LESSER THREAT FOR HEAVY RAINS...BUT THIS IS AT LEAST PARTLY DEPENDANT THAT THE DEVELOPING MCS IN NW TEXAS / SW OKLAHOMA INHIBITS THE LOW-LEVEL FEED INTO THESE STORMS AND THAT THEIR MOVEMENT ISNT OVERLY INFLUENCED RAPID DEVELOPMENT ON THEIR FLANK. WILL UPDATE ZONES BEFORE 10PM TO TWEAK WORDING AND RAIN CHANCES...BUT AT THIS TIME DO NOT PLAN A FLASH FLOOD WATCH AND WILL ONLY MAKE MINOR CHANGES TO THE CURRENT FORECAST. WILL LOWER POPS A LITTLE IN PARTS OF FAR SOUTHEAST OKLAHOMA PER SHV FORECAST DISCUSSION. /8 .TUL... AR...NONE. OK...NONE.
In the hours before
Local storm report, Jun 30, 4:20 AM CDT, 25 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
420 AM CDT WED JUN 30 1999
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0415 AM MANNFORD OK 60 MPH TSTM GUST
06/29/99 CREEK SKYWARN SPOTTER
REPORTED 60 MPH TSTM GUST
DRMLocal storm report, Jun 30, 4:20 AM CDT, 25 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
420 AM CDT WED JUN 30 1999
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0415 AM MANNFORD OK 60 MPH TSTM GUST
06/29/99 CREEK SKYWARN SPOTTER
REPORTED 60 MPH TSTM GUST
DRMLocal storm report, Jun 30, 4:22 AM CDT, 23 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
422 AM CDT WED JUN 30 1999
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0415 AM 2 E SAPULPA OK 75 MPH TSTM GUST
06/29/99 CREEKLocal storm report, Jun 30, 4:22 AM CDT, 23 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
422 AM CDT WED JUN 30 1999
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0415 AM 2 E SAPULPA OK 75 MPH TSTM GUST
06/29/99 CREEKLocal storm report, Jun 30, 4:25 AM CDT, 20 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
425 AM CDT WED JUN 30 1999
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0415 AM 2 W GLENPOOL OK 75 MPH TSTM GUST
06/29/99 TULSALocal storm report, Jun 30, 4:25 AM CDT, 20 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
425 AM CDT WED JUN 30 1999
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0415 AM 2 W GLENPOOL OK 75 MPH TSTM GUST
06/29/99 TULSAThe office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 30, 3:23 AM CDT | Severe Thunderstorm Warning | TSA | Creek, Tulsa | 52 min |
| Jun 30, 4:10 AM CDT | Severe Thunderstorm Warning | TSA | Creek, Okmulgee | 50 min |
| Jun 30, 4:37 AM CDT | Severe Thunderstorm Warning | TSA | Tulsa | 23 min |
| Jun 30, 5:05 AM CDT | Severe Thunderstorm Warning | TSA | Muskogee, Okmulgee, Wagoner | 40 min |
| Jun 30, 5:20 AM CDT | Severe Thunderstorm Warning | TSA | Creek, Okfuskee | 25 min |
| Jun 30, 5:42 AM CDT | Severe Thunderstorm Warning | TSA | McIntosh, Okfuskee, Okmulgee | 48 min |
| Jun 30, 7:34 AM CDT | Severe Thunderstorm Warning | TSA | Haskell, LeFlore, Sequoyah | 41 min |
| Jun 30, 8:10 AM CDT | Flash Flood Warning | TSA | Haskell, LeFlore | 3 hr |
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.