Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 331, NWS Tulsa, OK

June 18, 1998Okfuskee County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Jun 18, 1998, 7:54 PM CDT for Okfuskee County, Oklahoma. It was in force for 51 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: Jun 18, 1998, 7:54 PM CDT (00:54 UTC)
Expired: Jun 18, 1998, 8:45 PM CDT
In force: 51 min
Issued by: NWS Tulsa, OK
Area: Whole counties

County Okfuskee County, OK

The radar

The Norman radar (KTLX), 88 km from the middle of the area, began a volume at 00:56 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.

What was reported inside it

Time	Report	Where	Remark
Jun 18, 8:00 PM CDT	Hail 0.75	Castle, 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 18, 4:15 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 0.9 hours before the alert went out and 101 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: 3904 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 21 m²/s²
0-3 km storm-relative helicity: 224 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.

842 
WUUS54 KTSA 190055 RRA
SVRTUL
OKC107-190145-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
754 PM CDT THU JUN 18 1998

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

  OKFUSKEE COUNTY IN EAST CENTRAL OKLAHOMA

* UNTIL 845 PM CDT

* AT 752 PM...NATIONAL WEATHER SERVICE RADAR DETECTED A SEVERE
  THUNDERSTORM CENTERED 1 MILE SOUTHEAST OF BOLEY...MOVING EAST AT 25
  MPH.

* SOME LOCATIONS AFFECTED INCLUDE...
  CASTLE
  OKEMAH

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

BE ALERT TO RAPIDLY CHANGING WEATHER CONDITIONS AS STORMS APPROACH.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 18, 7:11 PM CDT	Severe Thunderstorm Warning	TSA	Cherokee	64 min
Jun 18, 7:15 PM CDT	Tornado Warning	TSA	Muskogee, Wagoner	30 min
Jun 18, 7:23 PM CDT	Severe Thunderstorm Warning	TSA	Ottawa	37 min
Jun 18, 7:33 PM CDT	Tornado Warning	TSA	Cherokee	42 min
Jun 18, 7:36 PM CDT	Tornado Warning	TSA	McIntosh, Okmulgee	39 min
Jun 18, 7:44 PM CDT	Severe Thunderstorm Warning	TSA	Muskogee	61 min
Jun 18, 7:49 PM CDT	Severe Thunderstorm Warning	TSA	Pittsburg	56 min
Jun 18, 8:14 PM CDT	Tornado Warning	TSA	McIntosh	46 min
Jun 18, 8:19 PM CDT	Severe Thunderstorm Warning	TSA	Latimer	56 min
Jun 18, 8:40 PM CDT	Tornado Warning	TSA	Haskell, Pittsburg	50 min
Jun 18, 8:53 PM CDT	Tornado Warning	TSA	Latimer	37 min
Jun 18, 9:05 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, Pittsburg	55 min
Jun 18, 9:08 PM CDT	Severe Thunderstorm Warning	TSA	Sequoyah	37 min
Jun 18, 9:12 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore, Pushmataha	63 min
Jun 18, 9:31 PM CDT	Tornado Warning	TSA	Latimer	44 min
Jun 18, 9:34 PM CDT	Flash Flood Warning	TSA	Latimer	2 hr
Jun 18, 9:42 PM CDT	Tornado Warning	TSA	Sequoyah	48 min
Jun 18, 10:07 PM CDT	Tornado Warning	TSA	LeFlore	38 min
Jun 18, 10:14 PM CDT	Severe Thunderstorm Warning	TSA	Pushmataha	61 min
Jun 18, 10:20 PM CDT	Severe Thunderstorm Warning	TSA	Pittsburg	40 min
Jun 18, 10:22 PM CDT	Severe Thunderstorm Warning	TSA	Latimer	38 min
Jun 18, 10:25 PM CDT	Tornado Warning	TSA	Pittsburg	50 min
Jun 18, 10:56 PM CDT	Tornado Warning	TSA	Latimer	49 min
Jun 18, 11:17 PM CDT	Severe Thunderstorm Warning	TSA	Pittsburg	43 min
Jun 18, 11:23 PM CDT	Severe Thunderstorm Warning	TSA	Okmulgee	37 min
Jun 18, 11:24 PM CDT	Tornado Warning	TSA	Pushmataha	51 min
Jun 18, 11:26 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh	49 min
Jun 18, 11:41 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	64 min
Jun 18, 11:50 PM CDT	Flash Flood Warning	TSA	Latimer	100 min
Jun 18, 11:55 PM CDT	Severe Thunderstorm Warning	TSA	Latimer	35 min
Jun 19, 12:07 AM CDT	Severe Thunderstorm Warning	TSA	Haskell	53 min
Jun 19, 12:44 AM CDT	Severe Thunderstorm Warning	TSA	LeFlore	46 min
Jun 19, 1:06 AM CDT	Severe Thunderstorm Warning	TSA	Haskell	54 min
Jun 19, 1:29 AM CDT	Severe Thunderstorm Warning	TSA	Latimer, Pittsburg	61 min
Jun 19, 1:59 AM CDT	Severe Thunderstorm Warning	TSA	Haskell	31 min
Jun 19, 2:11 AM CDT	Severe Thunderstorm Warning	TSA	LeFlore	64 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; radar from the NEXRAD Level II archive.