Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 292, NWS Tulsa, OK

July 21, 1997Haskell County, Muskogee County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Jul 21, 1997, 9:08 PM CDT for Haskell County, Muskogee County, Oklahoma. It was in force for 52 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 21, 1997, 9:08 PM CDT (02:08 UTC)
Expired: Jul 21, 1997, 10:00 PM CDT
In force: 52 min
Issued by: NWS Tulsa, OK
Area: Whole counties

Counties Haskell County, OK, Muskogee County, OK

What was reported inside it

Time	Report	Where	Remark
Jul 21, 9:10 PM CDT	Thunderstorm Wind	Porum, OK	Isolated severe thunderstorms developed in eastern Oklahoma during the evening of July 21st. Strong thunderstorm winds downed trees and power lines in Cleveland and 5 miles southeast of Ponca City, and trees were blown down in Osage and 6 miles north northwest

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 00:00Z, 2.1 hours before the alert went out and 197 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: 1022 J/kg
Mixed-layer CIN: -90 J/kg
Mixed-layer LCL: 1617 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 14 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KTUL 220209 RRA
SVRTUL
OKC101-061-220300-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
908 PM CDT MON JUL 21 1997
 
THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1000 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN EAST CENTRAL OKLAHOMA
 
   ...SOUTHERN MUSKOGEE COUNTY
 
IN SOUTHEAST OKLAHOMA
 
   ...NORTHERN HASKELL COUNTY
 
AT 907 PM...RADAR INDICATED A SEVERE THUNDERSTORM NEAR THE HASKELL AND
MUSKOGEE COUNTY LINE ABOUT 5 MILES SOUTHWEST OF PORUM. THIS STORM WAS
NEARLY STATIONARY. AREAS NEAR PORUM AND EUFAULA DAM CAN EXPECT WINDS
OVER 60 MPH WITH THIS THUNDERSTORMS.
 
 
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 21, 8:42 PM CDT, 26 minutes earlier.

Area forecast discussion, Jul 21, 8:42 PM CDT, 26 minutes before

FPUS3 KTUL 220141
AFDTUL

EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
842 PM CDT MON JUL 21 1997

SCT TSRA MAINLY N/NW OF TUL HEADED INTO AREAS N/NE OF TUL WITH
ISOLD TSRA IN SE OK STILL PERSISTING. SOME SVR KEEPING THINGS
BUSY...SO WILL LIKELY LET GOING ZNS RIDE THROUGH 10PM. MAY
UPDATE ZNS AFTER 10PM...TO ADJUST POPS. /13

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

In the hours before

Local storm report, Jul 21, 7:50 PM CDT, 1 hour 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
750 PM CDT MON JUL 21 1997

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

0730 PM    CLEVELAND                 OK   WIND DAMAGE
07/21/97   PAWNEE                         TREES AND POWER LINES
                                          DOWNED BY WIND

0735 PM    OSAGE                     OK   WIND DAMAGE
07/21/97   OSAGE                          TREES DOWNED BY WINDS

0737 PM    HOMINY                    OK   62 MPH TSTM GUST
07/21/97   OSAGE

Local storm report, Jul 21, 7:51 PM CDT, 1 hour 17 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
750 PM CDT MON JUL 21 1997

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

0730 PM    CLEVELAND                 OK   WIND DAMAGE
07/21/97   PAWNEE                         TREES AND POWER LINES
                                          DOWNED BY WIND

0735 PM    OSAGE                     OK   WIND DAMAGE            
07/21/97   OSAGE                          TREES DOWNED BY WINDS

0737 PM    HOMINY                    OK   62 MPH TSTM GUST
07/21/97   OSAGE

Local storm report, Jul 21, 8:02 PM CDT, 1 hour 6 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
802 PM CDT MON JUL 21 1997

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

0800 PM    HOMINY                    OK   .88 INCH HAIL
07/21/97   OSAGE

Local storm report, Jul 21, 8:03 PM CDT, 1 hour 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
802 PM CDT MON JUL 21 1997

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

0800 PM     HOMINY                    OK   .88 INCH HAIL
07/21/97   OSAGE

Local storm report, Jul 21, 8:15 PM CDT, 53 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
815 PM CDT MON JUL 21 1997

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

0740 PM    5 SE PONCA CITY           OK   WIND DAMAGE
07/21/97   OSAGE                          TREES AND POWER LINES DOWN

Local storm report, Jul 21, 8:16 PM CDT, 52 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
815 PM CDT MON JUL 21 1997

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

0740 PM    5 SE PONCA CITY           OK   WIND DAMAGE
07/21/97   OSAGE                          TREES AND POWER LINES DOWN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 7:40 PM CDT	Severe Thunderstorm Warning	TSA	Osage	50 min
Jul 21, 8:18 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Tulsa, Washington	42 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.