Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 250, NWS Tulsa, OK

July 15, 1997Haskell County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Jul 15, 1997, 2:09 PM CDT for Haskell County, Oklahoma. It was in force for 36 min. 1 report 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 15, 1997, 2:09 PM CDT (19:09 UTC)
Expired: Jul 15, 1997, 2:45 PM CDT
In force: 36 min
Issued by: NWS Tulsa, OK
Area: Whole counties

County Haskell County, OK

What was reported inside it

Time	Report	Where	Remark
Jul 15, 2:20 PM CDT	Hail 0.75	Stigler, 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, 7.2 hours before the alert went out and 207 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1353 J/kg
Mixed-layer CIN: -123 J/kg
Mixed-layer LCL: 1708 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 17 m²/s²
0-3 km storm-relative helicity: 30 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KTUL 151912 RRA
SVRTUL
OKC061-151945-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED...CORRECTED MOVEMENT...
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
209 PM CDT TUE JUL 15 1997
 
THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  245 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTHEAST OKLAHOMA
 
   ...HASKELL COUNTY
 
AT 2 06 PM A SEVERE THUNDERSTORM WAS LOCATED 1 MILE EAST OF STIGLER.
MOVEMENT WAS TO THE SOUTHEAST AT 10 MILES AN 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 15, 10:08 AM CDT, 4 hours 1 minute earlier.

Area forecast discussion, Jul 15, 10:08 AM CDT, 4 hours 1 minute before

EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
1005 AM CDT TUE JUL 15 1997

SHRA/TSRA CONT TO OCCUR ARND THE EDGES OF FA THIS MRNG. CNVCTN IN
WRN OK CONTS TO DROP SWD WHILE STRMS IN SW AR ARE MVG SSWD AND ARE
CLIPPING PARTS OF MCCURTAIN CNTY. TAIL END OF WK BNDRY APRNT ACRS
PARTS OF FA IN SFC AND H85 ANALYSES WHICH MAY PROVIDE A FOCUS FOR
AFTN TSRA DVLPMNT. MODIFIED 12Z SNDGS SUGGEST WK CAPPING INCRSG FM
E TO W ACRS FA. 12Z ETA SHOWS SYNOPTIC SCALE SUBSIDENCE IN SRN OK
BY THIS EVE WHICH MAY HELP MINIMIZE TSRA POTNL. HOWEVER CHC POPS
STILL SEEM JUSTIFIED ACRS MUCH OF FA FOR THIS AFTN. PREV FCST SEEMS
TO HV GOOD HANDLE ON THIS SITN THUS XPCT ONLY MDINOR MODIFICATIONS
FOR UPDATE.

.TUL...
OK...NONE.
AR...NONE.

In the hours before

Local storm report, Jul 15, 11:36 AM CDT, 2 hours 33 minutes before

STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1136 AM CDT TUE JUL 15 1997

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0740 PM    CAVE SPRINGS              AR   0.75 INCH HAIL
07/14/97   BENTON

Special weather statement, Jul 15, 1:00 PM CDT, 1 hour 9 minutes before

ARZ001-002-010-011-019-029-OKZ054>076-161200-

EASTERN OKLAHOMA/NORTHWEST ARKANSAS THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
100 PM CDT TUE JUL 15 1997

ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON AND
THIS EVENING OVER WEST CENTRAL ARKANSAS AND PARTS OF EASTERN
OKLAHOMA. THE THREAT AREA IS MAINLY SOUTH AND WEST OF A LINE FROM
BARTLESVILLE OKLAHOMA TO FORT SMITH ARKANSAS.

THE AIRMASS ACROSS MOST OF THE AREA WILL BECOME VERY UNSTABLE BY
LATE THIS AFTERNOON. WIDELY SCATTERED THUNDERSTORMS ARE EXPECTED TO
DEVELOP IN THE HEAT OF THE AFTERNOON AS TEMPERATURES RISE INTO THE
LOWER AND MID 90S. A WEAK SURFACE BOUNDARY...EXTENDING FROM SOUTH
OF TULSA TO NEAR FORT SMITH EARLY THIS AFTERNOON...MAY HELP FOCUS
THE ACTIVITY.

ANY THUNDERSTORMS THAT DEVELOP WILL HAVE THE POTENTIAL TO PRODUCE
LARGE HAIL AND DAMAGING DOWNBURST WINDS. THUNDERSTORMS WILL MOVE
VERY SLOWLY WITH WEAK WINDS ALOFT...AND VERY HEAVY RAINS COULD FALL
IN A FEW AREAS. THE STORMS WILL DIMINISH RAPIDLY AFTER SUNSET.

EMERGENCY MANAGEMENT AGENCIES AND STORM SPOTTER GROUPS SHOULD
MONITOR THE LATEST WEATHER CONDITIONS AND BE READY FOR POSSIBLE
ACTIVATION THROUGH EARLY THIS EVENING.

Special weather statement, Jul 15, 1:01 PM CDT, 1 hour 8 minutes before

ARZ001-002-010-011-019-029-OKZ054>076-161200-

EASTERN OKLAHOMA/NORTHWEST ARKANSAS THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
100 PM CDT TUE JUL 15 1997

ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON AND
THIS EVENING OVER WEST CENTRAL ARKANSAS AND PARTS OF EASTERN
OKLAHOMA. THE THREAT AREA IS MAINLY SOUTH AND WEST OF A LINE FROM
BARTLESVILLE OKLAHOMA TO FORT SMITH ARKANSAS.

THE AIRMASS ACROSS MOST OF THE AREA WILL BECOME VERY UNSTABLE BY
LATE THIS AFTERNOON. WIDELY SCATTERED THUNDERSTORMS ARE EXPECTED TO
DEVELOP IN THE HEAT OF THE AFTERNOON AS TEMPERATURES RISE INTO THE
LOWER AND MID 90S. A WEAK SURFACE BOUNDARY...EXTENDING FROM SOUTH
OF TULSA TO NEAR FORT SMITH EARLY THIS AFTERNOON...MAY HELP FOCUS
THE ACTIVITY.

ANY THUNDERSTORMS THAT DEVELOP WILL HAVE THE POTENTIAL TO PRODUCE
LARGE HAIL AND DAMAGING DOWNBURST WINDS. THUNDERSTORMS WILL MOVE
VERY SLOWLY WITH WEAK WINDS ALOFT...AND VERY HEAVY RAINS COULD FALL
IN A FEW AREAS. THE STORMS WILL DIMINISH RAPIDLY AFTER SUNSET.

EMERGENCY MANAGEMENT AGENCIES AND STORM SPOTTER GROUPS SHOULD
MONITOR THE LATEST WEATHER CONDITIONS AND BE READY FOR POSSIBLE
ACTIVATION THROUGH EARLY THIS EVENING.

The office that day

Everything else NWS Tulsa, OK issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 15, 6:23 AM CDT	Severe Thunderstorm Warning	TSA	Cherokee	37 min
Jul 15, 3:17 PM CDT	Severe Thunderstorm Warning	TSA	Pittsburg	43 min
Jul 15, 4:14 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh	46 min
Jul 15, 5:05 PM CDT	Severe Thunderstorm Warning	TSA	Okfuskee	25 min
Jul 15, 5:09 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh	36 min
Jul 15, 5:14 PM CDT	Severe Thunderstorm Warning	TSA	Okmulgee	31 min
Jul 15, 6:08 PM CDT	Severe Thunderstorm Warning	TSA	Okfuskee	37 min
Jul 15, 6:49 PM CDT	Severe Thunderstorm Warning	TSA	Rogers, Wagoner	41 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 1997 Every 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.