Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 404, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Aug 12, 1998, 2:38 PM CDT for LeFlore County, Oklahoma. It was in force for 22 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
- Aug 12, 1998, 2:38 PM CDT (19:38 UTC)
- Expired
- Aug 12, 1998, 3:00 PM CDT
- In force
- 22 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties
County LeFlore County, OK
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 12, 2:45 PM CDT | Hail 0.88 | Whitesboro, 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, 7.6 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1173 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- -3 m²/s²
- 0-3 km storm-relative helicity
- 37 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
186 WUUS54 KTSA 121940 RRA SVRTUL OKC079-122000- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 238 PM CDT WED AUG 12 1998 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHERN LE FLORE COUNTY IN SOUTHEASTERN OKLAHOMA * UNTIL 300 PM CDT * AT 235 PM...RADAR DETECTED A SEVERE THUNDERSTORM 1 MILE NORTH OF WHITESBORO...MOVING DRIFTING SOUTHEAST. * SOME LOCATIONS AFFECTED INCLUDE... WHITESBORO HAIL TO THE SIZE OF DIMES AND WIND GUSTS TO 60 MPH CAN BE EXPECTED IN THE WARNED AREA. BE 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 Aug 12, 10:40 AM CDT, 3 hours 58 minutes earlier.
Area forecast discussion, Aug 12, 10:40 AM CDT, 3 hours 58 minutes before
FPUS3 KTUL 121542 AFDTUL EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 1040 AM CDT WED AUG 12 1998 GOING FORECAST LOOKS GOOD. MODIFIED MORNING SOUNDINGS UNSTABLE AND WEAKLY CAPPED THUS THUNDERSTORM MENTION LOOKS REASONABLE. GOING TEMPERATURES APPEAR TO BE IN THE BALL PARK BUT MAY BE A TAD LOW IN A FEW PLACES BUT HAVE ONLY TWEAKED AT FYV. UPDATED MAINLY TO REMOVE MORNING FOG FROM FYV. .TUL... OK...NONE. AR...NONE. ABBAS
Nearby
Severe Thunderstorm Warnings in Oklahoma, 1998Every 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.