Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 10, NWS Tulsa, OK

February 26, 1998LeFlore County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Feb 26, 1998, 3:46 PM CST for LeFlore County, Oklahoma. It was in force for 44 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: Feb 26, 1998, 3:46 PM CST (21:46 UTC)
Expired: Feb 26, 1998, 4:30 PM CST
In force: 44 min
Issued by: NWS Tulsa, OK
Area: Whole counties

County LeFlore County, OK

What was reported inside it

Time	Report	Where	Remark
Feb 26, 3:53 PM CST	Hail 0.75	Pocola, 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

Springfield, MO (KSGF), launched 12:00Z, 9.8 hours before the alert went out and 237 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 931 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: -2 m²/s²
0-3 km storm-relative helicity: 24 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.

493 
WUUS54 KTSA 262147 RRA
SVRTUL
OKC079-262230-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
346 PM CST THU FEB 26 1998

THE NATIONAL WEATHER SERVICE IN TULSA OK HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 430 PM CST
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN SOUTHEASTERN OKLAHOMA

   ...NORTHERN LE FLORE COUNTY

AT 345 A SEVERE THUNDERSTORM WAS LOCATED 4 MILES SOUTHEAST OF SPIRO.
THIS STORM WAS MOVING TO THE EAST NORTHEAST AT 25 MILES AN HOUR.

HAIL TO THE SIZE OF NICKELS AND WIND GUSTS TO 60 MPH CAN BE
EXPECTED IN THE WARNED AREA.

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 Feb 26, 10:20 AM CST, 5 hours 26 minutes earlier.

Area forecast discussion, Feb 26, 10:20 AM CST, 5 hours 26 minutes before

EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE TULSA OK
1020 AM CST THU FEB 26 1998

MESONET INDICATING FRONT ABOUT HALF WAY THROUGH FA ATTM.  LATEST
VISIBLE IMAGERY SHOWING BACK EDGE OF CLOUDS JUST TO THE WEST OF
AREA.  CLEARING HAS BEEN SLOWED BY DEVELOPING SC ON BACK EDGE.
SLOWED DOWN THE CLEARING AND LOWERED POPS IN W ARKANSAS AS MAIN
PCPN SHOULD STAY TO THE EAST OF FA. TEMPS SEEM ON TRACK FOR NOW.

HOWIESON

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

In the hours before

Local storm report, Feb 26, 3:35 PM CST, 11 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
335 PM CST THU FEB 26 1998

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

0312 PM    SALLISAW                  OK   .88 INCH HAIL
02/26/98   SEQUOYAH

0315 PM    2 E SALLISAW              OK   .88 INCH HAIL
02/26/98   SEQUOYAH                       NICKEL SIZE HAIL JUST EAST
                                          OF SALLISAW ALONG I-40.
                                          REPORT FROM HAMS RELAYED
                                          THROUGH KHBS.

Local storm report, Feb 26, 3:35 PM CST, 11 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
335 PM CST THU FEB 26 1998

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

0312 PM    SALLISAW                  OK   .88 INCH HAIL
02/26/98   SEQUOYAH

0315 PM    2 E SALLISAW              OK   .88 INCH HAIL
02/26/98   SEQUOYAH                       NICKEL SIZE HAIL JUST EAST
                                          OF SALLISAW ALONG I-40.
                                          REPORT FROM HAMS RELAYED
                                          THROUGH KHBS.

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 25, 6:59 PM CST	Severe Thunderstorm Warning	TSA	Pittsburg	46 min
Feb 25, 7:28 PM CST	Severe Thunderstorm Warning	TSA	Cherokee, Sequoyah	62 min
Feb 25, 7:40 PM CST	Severe Thunderstorm Warning	TSA	Pittsburg	50 min
Feb 25, 8:36 PM CST	Severe Thunderstorm Warning	TSA	Choctaw	39 min
Feb 25, 9:30 PM CST	Severe Thunderstorm Warning	TSA	Pushmataha	45 min
Feb 25, 10:46 PM CST	Severe Thunderstorm Warning	TSA	LeFlore	74 min
Feb 26, 3:15 PM CST	Severe Thunderstorm Warning	TSA	Sequoyah	45 min
Feb 26, 4:31 PM CST	Severe Thunderstorm Warning	TSA	Latimer	44 min
Feb 26, 4:36 PM CST	Severe Thunderstorm Warning	TSA	LeFlore	54 min
Feb 26, 5:29 PM CST	Severe Thunderstorm Warning	TSA	LeFlore	61 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 1998 Every severe thunderstorm warning in 1998

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.