Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 320, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Aug 22, 1997, 2:58 AM CDT for Osage County, Oklahoma. It was in force for 47 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
- Aug 22, 1997, 2:58 AM CDT (07:58 UTC)
- Expired
- Aug 22, 1997, 3:45 AM CDT
- In force
- 47 min
- 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 07:58 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, 8.0 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
- 528 J/kg
- Mixed-layer CIN
- -176 J/kg
- Mixed-layer LCL
- 1489 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 92 m²/s²
- 0-3 km storm-relative helicity
- 228 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.4
The text
As transmitted, in the capitals the NWS used until 2016.
281 WUUS1 KTUL 220759 RRA SVRTUL OKC113-220845- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 258 AM CDT FRI AUG 22 1997 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 345 AM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTHEAST OKLAHOMA ...WESTERN OSAGE COUNTY AT 255 AM...RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS FROM 15 MILES NORTH OF GRAINOLA TO NEAR PONCA CITY. THIS LINE WAS MOVING SOUTHEAST AT 40 MPH. GRAINOLA...FORAKER...SHIDLER AND BURBANK ARE IN THE PATH OF THIS STORM. HAIL TO THE SIZE OF DIMES AND WIND GUSTS TO 70 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 Aug 21, 9:25 PM CDT, 5 hours 33 minutes earlier.
Area forecast discussion, Aug 21, 9:25 PM CDT, 5 hours 33 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 920 PM CDT THU AUG 21 1997 BEGINNINGS OF MCS CAN BE SEEN IN SW NEB W/CNVCTN DVLPG IN A BKN LINE ESEWD INTO N CNTRL KS. AS S/W DIVES INTO THE PLAINS TNGT TSRA SHLD CONT TO DVLP AND MV SSEWD. LOCATION OF THTE RDG/LLJ/UPR LVL DIV SUGGEST THAT HVIEST PRECIP SHLD STAY JUST N AND W OF FA THRU 12Z. HOWEVER SOME SHRA/TSRA COULD DVLP ACRS/MV INTO FA LATE TNGT W/CHC DCRSG TO THE S AND E. CRNT FCST HAS THIS SCENERIO COVERED. THUS ONLY XPCT SOME MINOR CHGS...MAINLY IN ERN ZNS TO ADJ CLDS/MINS. .TUL... OK...NONE. AR...NONE.
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 22, 3:38 AM CDT | Severe Thunderstorm Warning | TSA | Pawnee | 52 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; radar from the NEXRAD Level II archive.