Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 413, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Aug 19, 1998, 5:39 PM CDT for LeFlore 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
- Aug 19, 1998, 5:39 PM CDT (22:39 UTC)
- Expired
- Aug 19, 1998, 6:30 PM CDT
- In force
- 51 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties
County LeFlore County, OK
The radar
The Western Arkansas radar (KSRX), 53 km from the middle of the area, began a volume at 22:41 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, 5:45 PM CDT | Thunderstorm Wind 61 | Heavener, OK | 65 to 70 mph winds knocked down two large trees on the west side of town. Hail of one-quarter to one-half inch in diameter was also reported. |
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, 10.7 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
- 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.
000 TTAA00 KTUL 192239 RRA SVRTUL OKC079-192330- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 539 PM CDT WED AUG 19 1998 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... LE FLORE COUNTY IN SOUTHEASTERN OKLAHOMA * UNTIL 630 PM CDT * AT 540 PM...RADAR DETECTED A SEVERE THUNDERSTORM NEAR HEAVENER... MOVING WEST AT 5 MPH. * SOME LOCATIONS AFFECTED INCLUDE... HEAVENER B HOWE 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, 4:00 PM CDT, 1 hour 39 minutes earlier.
Area forecast discussion, Aug 19, 4:00 PM CDT, 1 hour 39 minutes before
FPUS3 KTUL 192058 AFDTUL EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 400 PM CDT WED AUG 19 1998 WIDELY SCATTERED THUNDERSTORMS HAVE FORMED GENERALLY ACROSS THE NORTHERN HALF OF THE FORECAST AREA. MEANWHILE THE USUAL ISOLATED SHOWERS AND THUNDERSTORMS ARE BEGINNING TO DEVELOP AS WELL ACROSS SOUTHERN SECTIONS. LOOKS LIKE ACTIVITY COULD LAST INTO THE EVENING AS OUTFLOW BOUNDARIES HELP TRIGGER ADDITIONAL STORMS BUT OVERALL SHOULD SEE A DIMINISHING TREND AS THE SUN SETS. WILL HAVE A HIGHER CHANCE OF RAIN MENTIONED IN THE ZONE FORECASTS SINCE THE OFFICIAL PROBABILITY OF PRECIPITATION DOES NOT BEGIN UNTIL 00 UNIVERSAL COORDINATED TIME AT WHICH TIME BELIEVE COVERAGE SHOULD BE MUCH LESS. MODELS ARE SUGGESTING THAT SOME MID LEVEL SHOWERS AND THUNDERSTORMS COULD DEVELOP ACROSS CENTRAL AND/OR WESTERN OKLAHOMA LATE TONIGHT. AT THIS TIME BELIEVE IF THIS OCCURS IT SHOULD STAY WEST OF THE FORECAST AREA. BY TOMORROW IT SHOULD BE BACK TO JUST ISOLATED ACTIVITY IN THE HIGHER TERRAIN IN EASTERN AND SOUTHERN AREAS. ALTHOUGH IF HIGHER MID LEVEL TEMPERATURES VERIFY ALL AREAS COULD BE DRY. WILL GO AHEAD AND PUT IN A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS FOR BOTH SATURDAY AND SUNDAY AS MEDIUM RANGE MODELS ARE IN FAIR AGREEMENT IN SHOWING A DISTURBANCE MOVING ACROSS THE AREA AS THE UPPER RIDGE RETREATS TO THE WEST. TUL 73 95 72 93 / 10 10 0 0 FSM 73 95 70 94 / 10 10 10 10 MLC 72 97 70 95 / 10 10 0 0 BVO 71 96 70 94 / 10 10 0 0 FYV 68 93 67 91 / 10 10 10 10 IDB 71 96 71 94 / 10 10 10 10 BYV 67 92 66 91 / 10 10 10 10 MIO 71 94 69 92 / 10 0 0 0 MKO 72 95 70 93 / 10 10 0 0 F10 71 96 71 94 / 10 10 0 0 HHW 73 97 72 95 / 10 10 10 10 .TUL... OK...NONE. AR...NONE.
In the hours before
Local storm report, Aug 19, 4:52 PM CDT, 47 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
452 PM CDT WED AUG 19 1998
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0340 PM 4 S LOCUST GROVE OK .88 INCH HAIL
08/19/98 MAYES
0435 PM 5 W JAY OK 70 MPH TSTM GUST
08/19/98 DELAWARE WIND GUST TO 70 MPH
REPORTED BY PUBLIC.Local storm report, Aug 19, 4:52 PM CDT, 47 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
452 PM CDT WED AUG 19 1998
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0340 PM 4 S LOCUST GROVE OK .88 INCH HAIL
08/19/98 MAYES
0435 PM 5 W JAY OK 70 MPH TSTM GUST
08/19/98 DELAWARE WIND GUST TO 70 MPH
REPORTED BY PUBLIC.Local storm report, Aug 19, 5:10 PM CDT, 29 minutes before
PRELIMINARY LOCAL STORM REPORT ...DELAYED REPORTS FROM 8/18/98...
NATIONAL WEATHER SERVICE TULSA OK
510 PM CDT WED AUG 19 1998
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0505 PM WAR EAGLE AR 1.00 INCH HAIL
08/18/98 BENTON AT WAR EAGLE MILL
0505 PM WAR EAGLE AR WIND DAMAGE
08/18/98 BENTON SEVERAL LARGE TREES
BLOWN DOWN NEAR WAR
EAGLE MILLLocal storm report, Aug 19, 5:31 PM CDT, 8 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
531 PM CDT WED AUG 19 1998
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0528 PM BROKEN ARROW OK .75 INCH HAIL
08/19/98 TULSA DIME SIZE HAIL REPORTED IN
NORTH BROKEN ARROW. REPORT
FROM SPOTTER.The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 19, 3:27 PM CDT | Severe Thunderstorm Warning | TSA | Mayes | 48 min |
| 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, 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.