Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 266, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Jul 17, 1997, 6:22 AM CDT for Pawnee County, Oklahoma. It was in force for 53 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jul 17, 1997, 6:22 AM CDT (11:22 UTC)
- Expired
- Jul 17, 1997, 7:15 AM CDT
- In force
- 53 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties
County Pawnee County, OK
The nearest sounding before it
Lamont, OK (KLMN), launched 00:00Z, 11.4 hours before the alert went out and 78 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
- 2105 J/kg
- Mixed-layer CIN
- -18 J/kg
- Mixed-layer LCL
- 2151 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 80 m²/s²
- 0-3 km storm-relative helicity
- 192 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 8.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KTUL 171124 RRA SVRTUL OKC117-171215- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 622 AM CDT THU JUL 17 1997 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 715 AM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTHEAST OKLAHOMA ...WESTERN PAWNEE COUNTY AT 622AM...RADAR SHOWED A SEVERE THUNDERSTORM 7 MILES NORTHWEST OF PAWNEE. THE STORM WAS MOVING SOUTHEAST AT 15 MPH. THE STORM WILL BE IN THE VICINITY OF THE CITY OF PAWNEE BY AROUND 7AM. SKEDEE AND RALSTON ARE ALSO IN THE PATH OF THIS STORM. HAIL TO THE SIZE OF NICKELS AND WIND GUSTS TO 60 MPH CAN BE EXPECTED IN THE WARNED AREA. DURING THE STORM MOVE INDOORS AND STAY AWAY FROM WINDOWS. TO PROTECT YOURSELF FROM LIGHTNING DO NOT USE THE TELEPHONE OR HAND HELD ELECTRICAL APPLIANCES...UNLESS IN AN EMERGENCY. MOTORISTS SHOULD BE ALERT FOR WATER ON ROADWAYS AND NEVER DRIVE ONTO A FLOODED ROAD. 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, 4:34 AM CDT, 1 hour 48 minutes earlier.
Area forecast discussion, Jul 17, 4:34 AM CDT, 1 hour 48 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 355 AM CDT THU JUL 17 1997 TSRA CONTS TO DVLP AND TRAIN ARND NEARLY STNRY UPPER LOW CENTERED N OF PNC CLOSE TO KS/OK BORDER. PCP ECHOS AND THE WIND PROFILER NET SHOW UPPER CIRC VRY WELL. VRY HVY PCP FALLING IN PVA AREA IN WRN HALF OF CIRC. IR SAT PICS SHOW OVERALL AREA SHRINKING AS ANOTHER AREA OF CONVECTION FIRES IN WC OK ON NOSE OF LLVL JET. H85 WINDS TURN SW ALONG THIS AXIS...SO WC OK TSRA MAY INTERUPT/HELP SUPPRESS ONGOING STORMS NW OF TUL. MODELS HANDLE MOVMENT OF SLOW MVNG UPPER SYS SIMILARLY...DRIFTING IT SLOWLY S TODAY WITH 03Z MESOETA SHOWING VORT MAX OVR TUL AT 00Z. PERSISTANT PCP THIS MORN SHUD LEAVE A GUD OUTFLOW BOUNDARY SOMEWHERE IN E OK TO HELP FOCUS PCP LATER TODAY. PCP HAS SHOWN NO SIGN OF GOING AWAY SO FAR...WITH HVY PCP SET TO CONTINUE OVER WESTERN OSAGE INTO THIS MORN. WATER CUD START TO CAUSE PROBLEMS IN AREAS NW OF TUL LATE THIS MORN IF PCP DOES NOT DIMINISH SOON AFTER SUNRISE. WITH ALL THE WATER HEADED DOWNSTREAM INTO OK ZNS 54/59 AND GUD CHC FOR ADDITIONAL HVY RAINS IN AREA WILL ISSUE FFA FOR TODAY FOR OSAGE/PAWNEE COUNTIES. WILL PUT LIKLEY POPS IN AREAS NW OF TUL FOR MAINLY THIS MORN AND TAPPER POPS TO 20 PERCENT OVER NW ARK. H7 TMPS PROGGED TO BE JUST A TAD COOLER THAN YEST WITH H85 DWPTS A BIT HIGHER...SO SHUD SEE AT LEAST ISO TSRA IN FAR E ZNS AWAY FROM INFLUENCE OF H5 CIRC. WILL CONT POPS INTO TONIGHT WITH HIGHEST POPS IN SE OK WHERE MESOETA PROGGS BEST PVA FROM UPPER SYS DRIFING SW. TROP SYS IN GULF IS PROGGED TO MOVE N AND BY 48 HRS IS SHOWN AFFECTING FA BY CREATING DEEP ERLY FLO. H7 TMPS WILL COOL A FEW DEGS AND WILL KEEP CAP VRY WEAK FRI/SAT...HOWEVER FA MAY BE IN SUBSIDENCE AREA NW OF MAIN ACTIVITY IN GULF REGION...SO PCP CHCS WILL REMAIN IN CHC/SLGT CHC CAT. CLDS MAY KEEP TMPS DOWN SVRL DEGS IN WRN ZNS TODAY...BUT WON'T BE TOO OPTIMISTIC AND WILL KEEP MAXES IN LOW/MID 90S. ERLY FLO SHUD KNOCK A DEG OR TWO FROM MAXES ON FRI. FWC TMPS LUK OK. /13 TUL 093/074 092/074 092 4332 FSM 095/072 094/073 092 2232 MLC 095/072 092/072 092 4432 BVO 092/071 092/071 092 4222 FYV 093/068 092/068 091 2222 IDB 096/068 091/ 072 091 2233 BYV 092/066 091/067 091 2222 .TUL... OK...FFA TODAY ZNS 54/59. AR...NONE. NNNYN
In the hours before
Special weather statement, Jul 17, 6:00 AM CDT, 22 minutes before
ARZ001-002-010-011-019-029-OKZ054>076-181200- EASTERN OKLAHOMA/NORTHWEST ARKANSAS THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 600 AM CDT THU JUL 17 1997 A FEW SEVERE THUNDERSTORMS ARE EXPECTED ACROSS EASTERN OKLAHOMA THROUGH TONIGHT. ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE OVER NORTHWEST ARKANSAS MAINLY THIS AFTERNOON AND THIS EVENING. EARLY THIS MORNING A VERY SLOW MOVING UPPER LEVEL DISTURBANCE WAS LOCATED ALONG THE KANSAS-OKLAHOMA BORDER TO THE NORTHWEST OF TULSA. THIS SYSTEM IS FORECAST TO DRIFT VERY SLOWLY DOWN ACROSS NORTHEAST OKLAHOMA TODAY...MOVING TO CENTRAL OR SOUTHEAST OKLAHOMA TONIGHT. SHOWERS AND THUNDERSTORMS ASSOCIATED WITH THIS SYSTEM HAVE BEEN OCCURRING TO THE NORTHWEST OF TULSA THROUGH THE NIGHT. THE SHOWERS AND THUNDERSTORMS MAY DIMINISH SOME THROUGH THE MORNING...HOWEVER ADDITIONAL SHOWERS AND THUNDERSTORMS WILL REMAIN POSSIBLE THROUGH TONIGHT AS THE SYSTEM SLOWLY MOVES TO THE SOUTH ACROSS THE AREA. WITH THE ATMOSPHERE BECOMING INCREASINGLY UNSTABLE DURING THE DAY...A FEW OF THE THUNDERSTORMS ARE EXPECTED TO BECOME SEVERE. LARGE HAIL AND STRONG DOWNBURST WINDS WILL BE THE PRIMARY THREAT. ALTHOUGH THE EFFECTS OF THE UPPER LEVEL SYSTEM SHOULD GENERALLY REMAIN CONFINED TO EASTERN OKLAHOMA...ISOLATED SEVERE THUNDERSTORMS WILL ALSO BE POSSIBLE OVER NORTHWEST ARKANSAS MAINLY DURING THE HEAT OF THE DAY. THE THREAT OF SEVERE THUNDERSTORMS OVER NORTHWEST ARKANSAS WILL THEN 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. AN UPDATED THUNDERSTORM OUTLOOK WILL BE ISSUED AROUND 1 PM THIS AFTERNOON.
Special weather statement, Jul 17, 6:02 AM CDT, 20 minutes before
ARZ001-002-010-011-019-029-OKZ054>076-181200- EASTERN OKLAHOMA/NORTHWEST ARKANSAS THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 600 AM CDT THU JUL 17 1997 A FEW SEVERE THUNDERSTORMS ARE EXPECTED ACROSS EASTERN OKLAHOMA THROUGH TONIGHT. ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE OVER NORTHWEST ARKANSAS MAINLY THIS AFTERNOON AND THIS EVENING. EARLY THIS MORNING A VERY SLOW MOVING UPPER LEVEL DISTURBANCE WAS LOCATED ALONG THE KANSAS-OKLAHOMA BORDER TO THE NORTHWEST OF TULSA. THIS SYSTEM IS FORECAST TO DRIFT VERY SLOWLY DOWN ACROSS NORTHEAST OKLAHOMA TODAY...MOVING TO CENTRAL OR SOUTHEAST OKLAHOMA TONIGHT. SHOWERS AND THUNDERSTORMS ASSOCIATED WITH THIS SYSTEM HAVE BEEN OCCURRING TO THE NORTHWEST OF TULSA THROUGH THE NIGHT. THE SHOWERS AND THUNDERSTORMS MAY DIMINISH SOME THROUGH THE MORNING...HOWEVER ADDITIONAL SHOWERS AND THUNDERSTORMS WILL REMAIN POSSIBLE THROUGH TONIGHT AS THE SYSTEM SLOWLY MOVES TO THE SOUTH ACROSS THE AREA. WITH THE ATMOSPHERE BECOMING INCREASINGLY UNSTABLE DURING THE DAY...A FEW OF THE THUNDERSTORMS ARE EXPECTED TO BECOME SEVERE. LARGE HAIL AND STRONG DOWNBURST WINDS WILL BE THE PRIMARY THREAT. ALTHOUGH THE EFFECTS OF THE UPPER LEVEL SYSTEM SHOULD GENERALLY REMAIN CONFINED TO EASTERN OKLAHOMA...ISOLATED SEVERE THUNDERSTORMS WILL ALSO BE POSSIBLE OVER NORTHWEST ARKANSAS MAINLY DURING THE HEAT OF THE DAY. THE THREAT OF SEVERE THUNDERSTORMS OVER NORTHWEST ARKANSAS WILL THEN 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. AN UPDATED THUNDERSTORM OUTLOOK WILL BE ISSUED AROUND 1 PM THIS AFTERNOON.
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, 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, 3:16 PM CDT | Severe Thunderstorm Warning | TSA | Okmulgee | 44 min |
| 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; the sounding from the Mesonet's radiosonde archive.