Alert archive / Oklahoma / Flash Flood Warnings in 1997
Flash Flood Warning 4, NWS Tulsa, OK
NWS Tulsa, OK issued this flash flood warning at Apr 11, 1997, 1:58 AM CDT for Osage 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 counties it named.
The facts
- Issued
- Apr 11, 1997, 1:58 AM CDT (06:58 UTC)
- Expired
- Apr 11, 1997, 5:00 AM CDT
- In force
- 3 hr
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties
County Osage County, OK
The radar
The Tulsa radar (KINX), 90 km from the middle of the area, began a volume at 07:01 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, 7.0 hours before the alert went out and 181 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1196 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 191 m²/s²
- 0-3 km storm-relative helicity
- 287 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.4
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KTUL 110704 COR FFWTUL OKC113-111000- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING...CORRECTED... NATIONAL WEATHER SERVICE TULSA OK 158 AM CDT FRI APR 11 1997 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 500 AM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTHEAST OKLAHOMA ...WESTERN OSAGE COUNTY RAINS IN EXCESS OF 2 INCHES HAVE FALLEN OVER WESTERN PORTIONS OF OSAGE COUNTY THROUGH THE EVENING. MODERATE TO HEAVY RAIN WILL CONTINUE THROUGH 3 AM WITH AN ADDITIONAL INCH OR 2 OF RAIN POSSIBLE. FLOODING OF LOW LYING AREAS AND POOR DRAINAGE AREAS CAN BE EXPECTED. THE COMMUNITIES OF GRAINOLA...SHIDLER...AND BURBANK IN NORTHWESTERN OSAGE COUNTY CAN EXPECT FLOODING OF STREETS AND ALSO PONDING OF WATER ALONG COUNTY ROADS. A FLASH FLOOD WARNING MEANS THAT FLOODING IS LIKELY OR HAS BEEN REPORTED. STAY ALERT AND WATCH FOR RAPIDLY RISING WATER. REMEMBER...IT'S IMPORTANT TO KNOW WHERE YOU AREP RELATIVE TO THE NEAREST STREAM...CREEK OR RIVER WHICH CAN BECOME A KILLER DURING PERIODS OF HEAVY RAIN. KEEP TUNED TO THIS STATION FOR THE LATEST WEATHER BULLETINS.
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 Apr 10, 10:06 PM CDT, 3 hours 52 minutes earlier.
Area forecast discussion, Apr 10, 10:06 PM CDT, 3 hours 52 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 940 PM CDT THU APR 10 1997 CDFNT HAS MANAGED TO SAG DOWN INTO FAR NWRN PART OF FA THIS EVNG WITH SHRA/TSRA GENRLLY CONFINED NORTH OF I-44 ATTM. FNT NOT XPCTD TO MAKE MUCH MORE SWRD PROGRESS THRU THE NGT AND XPCTD TO STAY TO THE NORTH OF TUL. MAIN CHGS WITH THIS EVNGS UPDATED WILL BE TO AREAS TO THE NORTH AND WEST OF TUL WITH ONLY A FEW MINOR CHGS ELSEWHERE. ...04... OK...NONE. AR...NONE.
In the hours before
Special weather statement, Apr 10, 8:30 PM CDT, 5 hours 28 minutes before
OKZ054-059-064-065-110200- EASTERN OKLAHOMA/NORTHWEST ARKANSAS THUNDERSTORM OUTLOOK...UPDATE.. NATIONAL WEATHER SERVICE TULSA OK 830 PM CDT THU APR 10 1997 SEVERE THUNDERSTORM WATCH NUMBER 151 HAS BEEN ISSUED FOR PARTS OF WESTERN AND CENTRAL OKLAHOMA. THE EASTERN PORTION OF THE WATCH INCLUDES OSAGE...PAWNEE...CREEK...AND OKFUSKEE COUNTIES UNTIL 200 AM CDT FRIDAY. STRONG SOUTHERLY WINDS CONTINUE TO BRING MOIST UNSTABLE AIR INTO OKLAHOMA. THE MOISTURE IS CONVERGING ALONG A COLD FRONT WHICH WILL MOVE SLOWLY SOUTHEAST ACROSS THE STATE DURING THE NIGHT. SEVERE THUNDERSTORMS WHICH DO DEVELOP ARE EXPECTED TO PRODUCE MAINLY HAIL AND STRONG WINDS. HOWEVER...ISOLATED TORNADOES MAY STILL BECOME A THREAT LATER IN THE NIGHT. THE THREAT OF SEVERE WEATHER EXISTS OVER OSAGE AND PAWNEE COUNTIES AT THIS TIME. HOWEVER...THE THREAT OF SEVERE WEATHER IS NOT EXPECTED OVER CREEK AND OKFUSKEE COUNTIES UNTIL AFTER 10 PM. EMERGENCY MANAGEMENT AGENCIES IN THE OSAGE AND PAWNEE COUNTIES SHOULD ACTIVATE AT THIS TIME. AGENCIES IN THE CREEK AND OKFUSKEE COUNTIES SHOULD MONITOR THE LATEST WEATHER CONDITIONS AND BE PREPARED TO ACTIVATE LATER IN THE EVENING.
Special weather statement, Apr 10, 10:35 PM CDT, 3 hours 23 minutes before
OKZ054-059-064-065-111200- EASTERN OKLAHOMA/NORTHWEST ARKANSAS THUNDERSTORM OUTLOOK...UPDATED NATIONAL WEATHER SERVICE TULSA OK 1035 PM CDT THU APR 10 1997 ISOLATED SEVERE THUNDERSTORMS WILL BE POSSIBLE FOR THE REMAINDER OF THE NIGHT...GENERALLY NORTHWEST OF A LINE FROM MIAMI TO MUSKOGEE TO MCALESTER. STRONG SOUTHERLY WINDS CONTINUE TO BRING MOIST UNSTABLE AIR INTO OKLAHOMA. THE MOISTURE IS CONVERGING ALONG A FRONT WHICH WILL MOVE VERY SLOWLY SOUTHEAST DURING THE NIGHT. BY MORNING...THE FRONT WILL EXTEND FROM NEAR MIAMI TO NEAR TULSA AND ON INTO SOUTHWEST OKLAHOMA. THUNDERSTORMS MAY DEVELOP ANYWHERE ALONG THE FRONT... WITH THE MAIN SEVERE WEATHER THREAT BEING FROM HAIL AND STRONG WINDS. EMERGENCY MANAGEMENT AGENCIES SHOULD MONITOR THE LATEST WEATHER INFORMATION...AND BE PREPARED TO ACTIVATE AS CONDITIONS WARRANT.
Special weather statement, Apr 10, 10:36 PM CDT, 3 hours 22 minutes before
OKZ054-059-064-065-111200- EASTERN OKLAHOMA/NORTHWEST ARKANSAS THUNDERSTORM OUTLOOK...UPDATED NATIONAL WEATHER SERVICE TULSA OK 1035 PM CDT THU APR 10 1997 ISOLATED SEVERE THUNDERSTORMS WILL BE POSSIBLE FOR THE REMAINDER OF THE NIGHT...GENERALLY NORTHWEST OF A LINE FROM MIAMI TO MUSKOGEE TO MCALESTER. STRONG SOUTHERLY WINDS CONTINUE TO BRING MOIST UNSTABLE AIR INTO OKLAHOMA. THE MOISTURE IS CONVERGING ALONG A FRONT WHICH WILL MOVE VERY SLOWLY SOUTHEAST DURING THE NIGHT. BY MORNING...THE FRONT WILL EXTEND FROM NEAR MIAMI TO NEAR TULSA AND ON INTO SOUTHWEST OKLAHOMA. THUNDERSTORMS MAY DEVELOP ANYWHERE ALONG THE FRONT... WITH THE MAIN SEVERE WEATHER THREAT BEING FROM HAIL AND STRONG WdINDS. EMERGENCY MANAGEMENT AGENCIES SHOULD MONITOR THE LATEST WEATHER INFORMATION...AND BE PREPARED TO ACTIVATE AS CONDITIONS WARRANT.
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 11, 4:48 AM CDT | Flash Flood Warning | TSA | Osage | 4 hr |
| Apr 11, 5:22 AM CDT | Severe Thunderstorm Warning | TSA | McIntosh | 53 min |
Nearby
Flash Flood Warnings in Oklahoma, 1997Every flash flood warning in 1997
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.