Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 270, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Jul 17, 1997, 3:16 PM CDT for Okmulgee County, Oklahoma. It was in force for 44 min. 2 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jul 17, 1997, 3:16 PM CDT (20:16 UTC)
- Expired
- Jul 17, 1997, 4:00 PM CDT
- In force
- 44 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties
County Okmulgee County, OK
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 17, 3:35 PM CDT | Thunderstorm Wind 56 | Okmulgee, OK | |
| Jul 17, 3:48 PM CDT | Thunderstorm Wind 65 | Okmulgee, OK |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Norman, OK (KOUN), launched 12:00Z, 8.3 hours before the alert went out and 138 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
- 2057 J/kg
- Mixed-layer CIN
- -115 J/kg
- Mixed-layer LCL
- 1356 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 73 m²/s²
- 0-3 km storm-relative helicity
- 87 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
The text
As transmitted, in the capitals the NWS used until 2016.
926 WUUS1 KTUL 172018 RRA SVRTUL OKC111-172100- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 316 PM CDT THU JUL 17 1997 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 400 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTHEAST OKLAHOMA ...OKMULGEE COUNTY AT 3 13 PM RADAR INDICATED A CLUSTER OF SEVERE THUNDERSTORMS CENTERED AROUND THE TOWN OF OKMULGEE. LITTLE IF ANY MOVEMENT WAS INDICATED. OKMULGEE AND MORRIS WILL BE AFFECTED BY THIS STORM DURING THE NEXT HALF HOUR. HAIL TO THE SIZE OF NICKELS AND WIND GUSTS TO 60 MPH CAN BE EXPECTED IN THE WARNED AREA. KEEP TUNED TO THIS STATION FOR THE LATEST WEATHER BULLETINS.
What forecasters said that day
The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Jul 17, 11:07 AM CDT, 4 hours 9 minutes earlier.
Area forecast discussion, Jul 17, 11:07 AM CDT, 4 hours 9 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 1105 AM CDT THU JUL 17 1997 WILL NEED TO ISSUE UPDATE AROUND MIDDAY TO CLEAN UP WORDING IN NE OK ZONES. WILL ALSO LIKELY NEED TO KNOCK DOWN TEMPS IN NW ZONES WHERE RAIN CONTINUES TO FALL. AREA OF TSRA/SHRA CONTINUES TO SPIRAL AROUND UPPER-LOW ALONG KS/OK BORDER...AND IS ONLY DRIFTING VERY SLOWLY EAST AND SOUTH THIS MORNING. THIS ACTIVITY HAS BEEN SLOWLY WEAKENING/SHRINKING SO FAR THIS MORNING AND EXPECT THIS TREND TO CONTINUE. FLASH FLOOD WATCH FOR THIS AREA LOOKS GOOD FOR NOW AS WESTERN PORTIONS OF WATCH AREA HAVE RECEIVED BETWEEN 3 AND 6 INCHES OF RAIN. ANY ADDITIONAL RAINS IN THIS AREA COULD CAUSE SOME FLOODING PROBLEMS...ESPECIALLY WITH COPIOUS AMOUNTS OF RAIN UPSTREAM ALREADY DRAINING INTO THIS AREA. WILL MAKE FINAL DECISION ON WHETHER TO CONTINUE FFA BASED ON RADAR TRENDS AT TIME OF UPDATE. AS FOR REDEVELOPMENT OF CONVECTION LATER TODAY...IT APPEARS THAT BEST CHANCE WILL BE ALONG AND TO THE SOUTH OF OUTFLOW BOUNDARY CURRENTLY SLICING THROUGH ERN OK. AS UPPER-LOW CONTINUES TO DRIFT SOUTHWARD...WOULD EXPECT WRN ZONES TO HAVE BEST CHANCE OF RAIN. CURRENT FORECAST HAS GOOD HANdDLE ON THIS SITUATION. ...19... .TUL... OK...FFA TODAY ZNS 54/59. AR...NONE.
In the hours before
Local storm report, Jul 17, 10:31 AM CDT, 4 hours 45 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1031 AM CDT THU JUL 17 1997
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0630 AM 5 SE PONCA CITY OK WATER COVERED COUNTY ROAD
07/17/97 OSAGE EXTENDING FROM 1/2 MILE
EAST OF HWY 60 SOUTHWARD
TOWARDS ARKANSAS RIVER.Local storm report, Jul 17, 10:33 AM CDT, 4 hours 43 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1031 AM CDT THU JUL 17 1997
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0630 AM 5 SE PONCA CITY OK WATER COVERED COUNTY ROAD
07/17/97 OSAGE EXTENDING FROM 1/2 MILE
EAST OF HWY 60 SOUTHWARD
TOWARDS ARKANSAS RIVER.Special weather statement, Jul 17, 1:00 PM CDT, 2 hours 16 minutes before
ARZ001-002-010-011-019-029-OKZ054>076-181200- EASTERN OKLAHOMA/NORTHWEST ARKANSAS THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 100 PM CDT THU JUL 17 1997 A FEW SEVERE THUNDERSTORMS ARE POSSIBLE ACROSS EASTERN OKLAHOMA THIS AFTERNOON THROUGH TONIGHT. ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE OVER NORTHWEST ARKANSAS THIS AFTERNOON AND THIS EVENING. A SLOW MOVING UPPER LEVEL SYSTEM WAS LOCATED IN NORTH CENTRAL OKLAHOMA THIS AFTERNOON. THIS SYSTEM SHOWED UP AS A SMALL CIRCULATION CENTER ON SATELLITE IMAGERY...AND CONTINUED TO SUPPORT THUNDERSTORM DEVELOPMENT ACROSS OSAGE AND PAWNEE COUNTIES AT 100 PM. THE UPPER LEVEL SYSTEM IS EXPECTED TO MOVE SLOWLY SOUTH THIS AFTERNOON AND TONIGHT. A RAIN-COOLED BOUNDARY...CREATED BY THE THUNDERSTORMS ACROSS OSAGE AND PAWNEE COUNTIES...WAS LOCATED FROM NEAR JAY TO WAGONER TO OKEMAH EARLY THIS AFTERNOON. THIS BOUNDARY WILL REMAIN STATIONARY THROUGH THE AFTERNOON HOURS. THE BEST CHANCE OF THUNDERSTORMS WILL BE NEAR THE UPPER LEVEL SYSTEM AND ALONG THE RAIN-COOLED BOUNDARY. THE AIRMASS WILL BE VERY UNSTABLE IN MOST AREAS THIS AFTERNOON...AND SOME OF THE STORMS COULD BE SEVERE. ALTHOUGH THE EFFECTS OF THE UPPER LEVEL SYSTEM WILL REMAIN CONFINED TO EASTERN OKLAHOMA...ISOLATED SEVERE THUNDERSTORMS WILL ALSO BE POSSIBLE OVER NORTHWEST ARKANSAS MAINLY DURING THE HEAT OF THE AFTERNOON. THE THREAT OF SEVERE THUNDERSTORMS OVER NORTHWEST ARKANSAS WILL DIMINISH AFTER SUNSET...WHILE SEVERE THUNDERSTORMS COULD LINGER INTO THE NIGHT OVER EASTERN OKLAHOMA. STORMS ARE EXPECTED TO BE SLOW MOVING...SO IN ADDITION TO THE THREAT OF LARGE HAIL AND STRONG DAMAGING WINDS...VERY HEAVY RAIN WILL BE POSSIBLE. EMERGENCY MANAGEMENT AGENCIES AND STORM SPOTTER GROUPS SHOULD MONITOR THE LATEST WEATHER CONDITIONS AND BE READY FOR POSSIBLE ACTIVATION.
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 17, 4:12 AM CDT | Flash Flood Warning | TSA | Osage | 4 hr |
| Jul 17, 6:22 AM CDT | Severe Thunderstorm Warning | TSA | Pawnee | 53 min |
| Jul 17, 1:46 PM CDT | Severe Thunderstorm Warning | TSA | Creek | 44 min |
| Jul 17, 2:10 PM CDT | Severe Thunderstorm Warning | TSA | Okfuskee | 50 min |
| Jul 17, 2:58 PM CDT | Severe Thunderstorm Warning | TSA | Okfuskee | 47 min |
| Jul 17, 3:07 PM CDT | Flash Flood Warning | TSA | Okfuskee | 3 hr |
| Jul 17, 3:39 PM CDT | Flash Flood Warning | TSA | Osage | 4 hr |
| Jul 17, 3:52 PM CDT | Flash Flood Warning | TSA | Okmulgee | 4 hr |
| Jul 17, 3:58 PM CDT | Severe Thunderstorm Warning | TSA | McIntosh, Okmulgee | 47 min |
| Jul 17, 4:41 PM CDT | Severe Thunderstorm Warning | TSA | Pittsburg | 49 min |
| Jul 17, 5:01 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 44 min |
| Jul 17, 5:21 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 54 min |
| Jul 17, 6:25 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 50 min |
| Jul 17, 6:52 PM CDT | Severe Thunderstorm Warning | TSA | Pawnee | 53 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 1997Every severe thunderstorm 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.