Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 117, NWS Tulsa, OK

April 16, 1998Adair County, Haskell County, Sequoyah County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Apr 16, 1998, 3:06 AM CDT for Adair County, Haskell County, Sequoyah County, Oklahoma. It was in force for 54 min. 2 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: Apr 16, 1998, 3:06 AM CDT (08:06 UTC)
Expired: Apr 16, 1998, 4:00 AM CDT
In force: 54 min
Issued by: NWS Tulsa, OK
Area: Whole counties

Counties Adair County, OK, Haskell County, OK, Sequoyah County, OK

What was reported inside it

Time	Report	Where	Remark
Apr 16, 3:15 AM CDT	Hail 1	Bunch, OK
Apr 16, 3:56 AM CDT	Hail 1.75	Nicut, 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 00:00Z, 8.1 hours before the alert went out and 178 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: 576 J/kg
Mixed-layer CIN: -58 J/kg
Mixed-layer LCL: 731 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 138 m²/s²
0-3 km storm-relative helicity: 226 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 4.8

Open this sounding in Storm Lab

The text

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

562 
WUUS54 KTSA 160808 RRA
SVRTUL
OKC001-061-135-160900-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
306 AM CDT THU APR 16 1998

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN ADAIR COUNTY IN EAST CENTRAL OKLAHOMA
  NORTHERN HASKELL COUNTY IN SOUTHEASTERN OKLAHOMA
  SEQUOYAH COUNTY IN EAST CENTRAL OKLAHOMA

* UNTIL 400 AM CDT

* AT 304 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED A
  BROKEN LINE OF SEVERE THUNDERSTORMS FROM 10 MILES SOUTH OF
  TAHLEQUAH TO 6 MILES WEST OF WEBBERS FALLS TO 5 MILES NORTHWEST OF
  EUFAULA... MOVING EAST NORTHEAST AT 50 MPH.

* SOME LOCATIONS AFFECTED INCLUDE...
  TAMAHA
  STILWELL
  VIAN

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

REMAIN ALERT TO RAPIDLY CHANGING WEATHER CONDITIONS AS STORMS
APPROACH.

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 Apr 15, 10:49 PM CDT, 4 hours 17 minutes earlier.

Area forecast discussion, Apr 15, 10:49 PM CDT, 4 hours 17 minutes before

FPUS3 KTUL 160351
AFDTUL

EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
1049 PM CDT WED APR 15 1998

HAVE ALREADY SENT UPDATED ZONES AND RDF TO MAKE 1ST PD ADJUSTMENTS
TO ZONES BASED ON CURRENT TRENDS.  STG TSRA HAVE SHIFTED INTO CNTRL
AND SRN ARK AND EXTRM SE OKLA...SO HAVE TRIMMED TOR WATCH DOWN
ACCORDINGLY.

COLD FRONT WAS STILL MOVG VERY SLOWLY S THIS EVE...AND EXTDD FROM
VCNTY KFSM TO KMLC AT 03Z. BEST CHCS FOR TSRA REST OF NITE WILL
BE IN AREAS NEAR THE FRONT...BUT ANOTHER SHORTWAVE APCHG FROM THE
WEST WILL KEEP THE THREAT OF PCPN IN THE FCST THRU THE NITE.
HAVE ALREADY SEEN SOME ECHOES MOVING IN NORTH CNTRL OKLA THIS EVE.

1ST PD ADJUSTMENTS WERE MADE TO TEMPS...WINDS AND SKY CONDITION.
SKIES HAD BECOME MO CLEAR ACRS PARTS OF THE AREA IN THE WAKE OF
THE COLD FRONT AND TSRA...BUT LO CLDS IN KS AND MID CLOUDS FROM
SHORTWV SHUD MOVE IN AND MAKE SKIES MO CLDY LATER TONITE.

FCSTID = 9

.TUL...
OK...TORNADO WATCH 217 UNTIL MIDNIGHT FOR ZONES OKZ049...OKZ076.

AR...NONE.

In the hours before

Special weather statement, Apr 15, 9:28 PM CDT, 5 hours 38 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
928 PM CDT WED APR 15 1998

OKZ068>075-ARZ001-010-019-160323-

THE TORNADO WATCH IS NO LONGER IN EFFECT FOR THE FOLLOWING COUNTIES
IN

EASTERN OKLAHOMA...
         ADAIR               CHEROKEE            HASKELL
         LATIMER             MCINTOSH            MUSKOGEE
         PITTSBURG           SEQUOYAH...

NORTHWESTERN ARKANSAS...
         BENTON              CRAWFORD            WASHINGTON

THE SEVERE WEATHER THREAT HAS SHIFTED SOUTH OF THIS AREA.
SCATTERED SHOWERS OR THUNDERSTORMS ARE STILL POSSIBLE IN THE
ABOVE COUNTIES...BUT SEVERE WEATHER IS NO LONGER EXPECTED.

OKZ049-076-ARZ002-011-020-029-160500-

A TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT CDT FOR THE
FOLLOWING COUNTIES IN

EASTERN OKLAHOMA...
         LE FLORE            PUSHMATAHA...

NORTHWESTERN ARKANSAS...
         CARROLL             FRANKLIN            MADISON
         SEBASTIAN

A LINE OF STRONG TO SEVERE THUNDERSTORMS CONTINUES MOVING ACROSS
THESE COUNTIES THIS EVENING.

Local storm report, Apr 15, 9:37 PM CDT, 5 hours 29 minutes before

STORM REPORT
NATIONAL WEATHER SERVICE TULSA, OK
837 PM CST WED APR 15 1998

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

0834 PM    3 W PANAMA                OK   .88 INCH HAIL
04/15/98   LEFLORE

Local storm report, Apr 15, 9:41 PM CDT, 5 hours 25 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
941 PM CDT WED APR 15 1998

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

0856 PM    BONANZA                   AR   .88 INCH HAIL
04/15/98   SEBASTIAN

0856 PM    RYE HILL                  AR   .75 INCH HAIL
04/15/98   SEBASTIAN

0909 PM    EXCELSIOR                 AR   .88 INCH HAIL
04/15/98   SEBASTIAN

0922 PM    WITCHERVILLE              AR   .75 INCH HAIL
04/15/98   SEBASTIAN

Local storm report, Apr 15, 9:41 PM CDT, 5 hours 25 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
941 PM CDT WED APR 15 1998

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

0856 PM    BONANZA                   AR   .88 INCH HAIL
04/15/98   SEBASTIAN

0856 PM    RYE HILL                  AR   .75 INCH HAIL
04/15/98   SEBASTIAN

0909 PM    EXCELSIOR                 AR   .88 INCH HAIL
04/15/98   SEBASTIAN

0922 PM    WITCHERVILLE              AR   .75 INCH HAIL
04/15/98   SEBASTIAN

Special weather statement, Apr 15, 10:25 PM CDT, 4 hours 41 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1025 PM CDT WED APR 15 1998

ARZ002-011-020-029-160422-

THE TORNADO WATCH IS NO LONGER IN EFFECT FOR THE FOLLOWING COUNTIES
IN

NORTHWESTERN ARKANSAS...
         CARROLL             FRANKLIN            MADISON
         SEBASTIAN

THE THREAT OF SEVERE WEATHER HAS SHIFTED TO THE EAST OF THESE
COUNTIES.

OKZ049-076-160500-

A TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT CDT FOR THE
FOLLOWING COUNTIES IN

EASTERN OKLAHOMA...
         LE FLORE            PUSHMATAHA

STRONG TO SEVERE THUNDERSTORMS REMAIN POSSIBLE ACROSS THE SOUTHERN
PARTS OF LE FLORE AND PUSHMATAHA COUNTIES UNTIL MIDNIGHT.

Special weather statement, Apr 15, 10:25 PM CDT, 4 hours 41 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1025 PM CDT WED APR 15 1998

ARZ002-011-020-029-160422-

THE TORNADO WATCH IS NO LONGER IN EFFECT FOR THE FOLLOWING COUNTIES
IN

NORTHWESTERN ARKANSAS...
         CARROLL             FRANKLIN            MADISON
         SEBASTIAN

THE THREAT OF SEVERE WEATHER HAS SHIFTED TO THE EAST OF THESE
COUNTIES.

OKZ049-076-160500-

A TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT CDT FOR THE
FOLLOWING COUNTIES IN

EASTERN OKLAHOMA...
         LE FLORE            PUSHMATAHA

STRONG TO SEVERE THUNDERSTORMS REMAIN POSSIBLE ACROSS THE SOUTHERN
PARTS OF LE FLORE AND PUSHMATAHA COUNTIES UNTIL MIDNIGHT.

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 15, 7:01 PM CDT	Severe Thunderstorm Warning	TSA	Latimer, LeFlore	59 min
Apr 15, 7:40 PM CDT	Severe Thunderstorm Warning	TSA	Pittsburg	50 min
Apr 15, 8:20 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	40 min
Apr 15, 8:45 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore, Pushmataha	60 min
Apr 15, 11:18 PM CDT	Severe Thunderstorm Warning	TSA	Choctaw	42 min
Apr 15, 11:55 PM CDT	Severe Thunderstorm Warning	TSA	Choctaw	35 min
Apr 16, 2:30 AM CDT	Severe Thunderstorm Warning	TSA	McIntosh	45 min
Apr 16, 2:39 AM CDT	Severe Thunderstorm Warning	TSA	LeFlore, Pushmataha	36 min
Apr 16, 2:52 AM CDT	Severe Thunderstorm Warning	TSA	Cherokee, Muskogee	38 min
Apr 16, 4:34 AM CDT	Severe Thunderstorm Warning	TSA	Latimer	56 min
Apr 16, 4:52 AM CDT	Severe Thunderstorm Warning	TSA	LeFlore	38 min
Apr 16, 4:58 AM CDT	Severe Thunderstorm Warning	TSA	Pushmataha	47 min
Apr 16, 5:28 AM CDT	Severe Thunderstorm Warning	TSA	LeFlore	47 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.