Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 289, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Jul 21, 1997, 6:53 PM CDT for Osage County, Pawnee County, Oklahoma. It was in force for 52 min. 4 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 21, 1997, 6:53 PM CDT (23:53 UTC)
- Expired
- Jul 21, 1997, 7:45 PM CDT
- In force
- 52 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties
Counties Osage County, OK, Pawnee County, OK
The radar
The Tulsa radar (KINX), 94 km from the middle of the area, began a volume at 23:54 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 21, 7:30 PM CDT | Thunderstorm Wind | Cleveland, OK | |
| Jul 21, 7:35 PM CDT | Thunderstorm Wind | Osage, OK | |
| Jul 21, 7:37 PM CDT | Thunderstorm Wind 54 | Hominy, OK | |
| Jul 21, 7:40 PM CDT | Thunderstorm Wind | Ponca City, 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
Lamont, OK (KLMN), launched 12:00Z, 11.9 hours before the alert went out and 85 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
- 464 J/kg
- Mixed-layer CIN
- -179 J/kg
- Mixed-layer LCL
- 1232 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- -80 m²/s²
- 0-3 km storm-relative helicity
- -49 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KTUL 212354 RRA SVRTUL OKC113-117-220045- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 653 PM CDT MON JUL 21 1997 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 745 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN NORTHEAST OKLAHOMA ...WESTERN OSAGE COUNTY...PAWNEE COUNTY AT 653 PM...RADAR INDICATED ONE SEVERE THUNDERSTORM 5 MILES SOUTH OF CLEVELAND. THIS STORM WAS NEARLY STATIONARY OR DRIFTING SLOWLY NORTHEAST. ANOTHER SEVERE THUNDERSTORM WAS LOCATED 12 MILES WEST OF THE CITY OF PAWNEE. THIS STORM WAS MOVING NORTHEAST AT 10 MPH. PAWNEE...RALSTON...FAIRFAX...CLEVELAND...WESTPORT AND MANNFORD ARE IN THE PATHS OF THESE STORMS. HAIL TO THE SIZE OF QUARTERS 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 TELEPHOXNE 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 21, 3:05 PM CDT, 3 hours 48 minutes earlier.
Area forecast discussion, Jul 21, 3:05 PM CDT, 3 hours 48 minutes before
FPUS3 KTUL 212004
AFDTUL
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
305 PM CDT MON JUL 21 1997
WDLY SCTD TSRA HAVE DEVLPD OVR PARTS OF SE OKLA AND NW ARK THIS
AFTN...WITH CONVECTION BEGINNING TO BUBBLE ALG THE BNDRY ACRS NE
OKLA. WL MENTION WDLY SCTD EVE TSRA ACRS SRN AREAS...BUT WILL PUT
IN CHC POPS TONITE WITH NO TIME CONSTRAINTS ACRS ZONES ALG AND
NORTH OF INTERSTATE 44 WHERE MOIST AXIS/UPR SHEAR ZONE MAY SUPPORT
ACTIVITY INTO THE NITE.
THREAT OF TSRA WL CONT INTO MIDWEEK AS MOIST AIRMASS REMAINS IN
PLACE. UPR RIDGE BUILDS OVR ROCKIES...AND MID LVL TEMPS MAY WARM
SOME OVER THE AREA ON TUES/WEDS. MODELS INDICATE WEAK BNDRIES TO
REMAIN IN AREA TUES AND MAYBE WEDS...BUT WARMING MID LVL TEMPS AND
UNCERTAINTIES WITH RESPECT TO BNDRY LOCATION MAKE LOCATION OF TSRA
DVLPMENT A TUFF FCST. WL GENLY GO WITH 20 POPS TUES NITE/WEDS.
FOR TEMPS...WL GENLY GO WITH MODIFIED PERSISTENCE FCST.
TUL 74/94/74/95 3322 MLC 72/96/73/96 2212
BVO 73/94/72/95 4322 IDB 71/97/71/97 1222
FYV 69/93/69/93 2322 FSM 73/96/73/96 2322
/9
.TUL...
OK...NONE.
AR...NONE.In the hours before
Special weather statement, Jul 21, 1:00 PM CDT, 5 hours 53 minutes before
ARZ001-002-010-011-019-029-OKZ054>076-221200- EASTERN OKLAHOMA/NORTHWEST ARKANSAS THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 100 PM CDT MON JUL 21 1997 ISOLATED SEVERE THUNDERSTORMS ARE EXPECTED IN EASTERN OKLAHOMA AND NORTHWEST ARKANSAS THIS AFTERNOON AND THIS EVENING. A FEW THUNDERSTORMS WILL DEVELOP ACROSS THE AREA THIS AFTERNOON AND CONTINUE INTO THIS EVENING...BEFORE DISSIPATING A LITTLE AFTER SUNSET. ATMOSPHERIC CONDITIONS ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS WILL BE CHARACTERIZED BY HIGH INSTABILITY AND WEAK WINDS ALOFT. THIS WILL LEAD TO THE POTENTIAL FOR PULSE SEVERE STORMS WITH LOCALLY HEAVY RAIN. THE MOST NUMEROUS STORMS ARE EXPECTED ALONG AND NEAR A THUNDERSTORM BOUNDARY WHICH AT 1PM EXTENDED FROM SOUTHERN MADISON COUNTY ARKANSAS TO JUST NORTH OF TAHLEQUAH TO TULSA TO SOUTHERN OSAGE COUNTY. OTHER STORMS WILL ALSO DEVELOP IN THE HIGHER TERRAIN OF SOUTHEAST OKLAHOMA AND WEST CENTRAL ARKANSAS. CIVIL DEFENSE AND SPOTTER GROUPS SHOULD MONITOR THE WEATHER CONDITIONS AND BE PREPARED FOR QUICK ACTIVATION THIS AFTERNOON AND EVENING.
Special weather statement, Jul 21, 1:04 PM CDT, 5 hours 49 minutes before
ARZ001-002-010-011-019-029-OKZ054>076-221200- EASTERN OKLAHOMA/NORTHWEST ARKANSAS THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 100 PM CDT MON JUL 21 1997 ISOLATED SEVERE THUNDERSTORMS ARE EXPECTED IN EASTERN OKLAHOMA AND NORTHWEST ARKANSAS THIS AFTERNOON AND THIS EVENING. A FEW THUNDERSTORMS WILL DEVELOP ACROSS THE AREA THIS AFTERNOON AND CONTINUE INTO THIS EVENING...BEFORE DISSIPATING A LITTLE AFTER SUNSET. ATMOSPHERIC CONDITIONS ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS WILL BE CHARACTERIZED BY HIGH INSTABILITY AND WEAK WINDS ALOFT. THIS WILL LEAD TO THE POTENTIAL FOR PULSE SEVERE STORMS WITH LOCALLY HEAVY RAIN. THE MOST NUMEROUS STORMS ARE EXPECTED ALONG AND NEAR A THUNDERSTORM BOUNDARY WHICH AT 1PM EXTENDED FROM SOUTHERN MADISON COUNTY ARKANSAS TO JUST NORTH OF TAHLEQUAH TO TULSA TO SOUTHERN OSAGE COUNTY. OTHER STORMS WILL ALSO DEVELOP IN THE HIGHER TERRAIN OF SOUTHEAST OKLAHOMA AND WEST CENTRAL ARKANSAS. CIVIL DEFENSE AND SPOTTER GROUPS SHOULD MONITOR THE WEATHER CONDITIONS AND BE PREPARED FOR QUICK ACTIVATION THIS AFTERNOON AND EVENING.
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; radar from the NEXRAD Level II archive.