Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 410, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Aug 19, 1998, 3:27 PM CDT for Mayes County, Oklahoma. It was in force for 48 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 19, 1998, 3:27 PM CDT (20:27 UTC)
- Expired
- Aug 19, 1998, 4:15 PM CDT
- In force
- 48 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties
County Mayes County, OK
The radar
The Tulsa radar (KINX), 33 km from the middle of the area, began a volume at 20:30 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 |
|---|---|---|---|
| Aug 19, 3:40 PM CDT | Hail 0.88 | Locust Grove, 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, 8.5 hours before the alert went out and 144 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
- 1103 J/kg
- Mixed-layer CIN
- -122 J/kg
- Mixed-layer LCL
- 1601 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 7 m²/s²
- 0-3 km storm-relative helicity
- 28 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
519 WUUS54 KTSA 192028 RRA SVRTUL OKC097-192115- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 327 PM CDT WED AUG 19 1998 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHERN MAYES COUNTY IN NORTHEASTERN OKLAHOMA * UNTIL 415 PM CDT * AT 325 PM...RADAR DETECTED A SEVERE THUNDERSTORM JUST SOUTH OF LOCUST GROVE...MOVING WEST AT 10 MPH. * SOME LOCATIONS AFFECTED INCLUDE... CHOUTEAU MAZIE 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.
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 19, 10:15 AM CDT, 5 hours 12 minutes earlier.
Area forecast discussion, Aug 19, 10:15 AM CDT, 5 hours 12 minutes before
FPUS3 KTUL 191516 AFDTUL EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 1015 AM CDT WED AUG 19 1998 MORNING UPPER AIR DATA REVEALS ONLY SUBTLE CHANGES AT MOST COMPARED WITH PREVIOUS FEW DAYS. HOWEVER VISIBLE SATELLITE IMAGERY SHOWS SOME ALTOCUMULUS CASTELLANUS IN CENTRAL ARKANSAS. AND THERE MAY BE A WEAK BOUNDARY IN NORTH CENTRAL/NORTHEAST ARKANSAS FROM AN EARLIER CLUSTER OF STORMS. IF BOUNDARY KEEPS ITS DEFINITION IT MAY MAKE INTO EASTERN PARTS OF THE FORECAST AREA. WITH A WEAK DISTURBANCE ROTATING UNDERNEATH THE UPPER RIDGE CENTERED IN NORTHERN MISSOURI AND THE HEAT OF THE DAY THIS MAY BE ENOUGH TO RESULT IN MORE THAN THE ISOLATED SHOWERS AND THUNDERSTORMS THAT HAVE OCCURRED PREVIOUSLY WITH THIS PATTERN. THUS WILL KEEP A 30 PERCENT PROBABILITY OF PRECIPITATION FOR EASTERN AND SOUTHERN SECTIONS. HOWEVER WILL LOWER THE CHANCE TO 20 PERCENT ELSEWHERE. OTHERWISE LOOKS LIKE ONLY MINOR ADJUSTMENTS MAY BE NEEDED TO TEMPERATURES AND WINDS. .TUL... OK...NONE. AR...NONE.
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 19, 4:26 PM CDT | Severe Thunderstorm Warning | TSA | Wagoner | 64 min |
| Aug 19, 5:24 PM CDT | Severe Thunderstorm Warning | TSA | Tulsa | 51 min |
| Aug 19, 5:39 PM CDT | Severe Thunderstorm Warning | TSA | LeFlore | 51 min |
| Aug 19, 6:11 PM CDT | Severe Thunderstorm Warning | TSA | Pittsburg | 49 min |
| Aug 19, 6:29 PM CDT | Severe Thunderstorm Warning | TSA | Washington | 46 min |
| Aug 19, 6:39 PM CDT | Severe Thunderstorm Warning | TSA | Latimer, Pushmataha | 51 min |
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; radar from the NEXRAD Level II archive.