Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 462, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Oct 16, 1998, 7:59 PM CDT for Adair County, Oklahoma. It was in force for 31 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
- Oct 16, 1998, 7:59 PM CDT (00:59 UTC)
- Expired
- Oct 16, 1998, 8:30 PM CDT
- In force
- 31 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties
County Adair County, OK
The radar
The Western Arkansas radar (KSRX), 71 km from the middle of the area, began a volume at 00:58 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 |
|---|---|---|---|
| Oct 16, 8:20 PM CDT | Hail 0.75 | Stilwell, 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, 1.0 hours before the alert went out and 137 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
- 204 J/kg
- Mixed-layer CIN
- -34 J/kg
- Mixed-layer LCL
- 742 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 231 m²/s²
- 0-3 km storm-relative helicity
- 220 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 2.7
The text
As transmitted, in the capitals the NWS used until 2016.
113
WUUS54 KTSA 170101 RRA
SVRTUL
OKC001-170130-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
759 PM CDT FRI OCT 16 1998
THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR
ADAIR COUNTY IN EAST CENTRAL OKLAHOMA
* UNTIL 830 PM CDT
* AT 759 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM 3 MILES EAST OF
BUNCH...MOVING NORTHEAST AT 20 MILES PER HOUR.
* SOME LOCATIONS AFFECTED INCLUDE... BUNCH AND STILWELL
HAIL TO THE SIZE OF DIMES AND WIND GUSTS TO 60 MPH CAN BE EXPECTED IN
THE WARNED AREA.
BE ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS AS STORMS APPROACH.
THIS IS A DANGEROUS STORM. IF YOU ARE NEAR ITS PATH YOU SHOULD
PREPARE FOR VERY LARGE HAIL AND STRONG DAMAGING STRAIGHT LINE WINDS.
SEEK SHELTER IN A STURDY BUILDING AND STAY AWAY FROM WINDOWSWhat 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 Oct 16, 4:23 PM CDT, 3 hours 36 minutes earlier.
Area forecast discussion, Oct 16, 4:23 PM CDT, 3 hours 36 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 423 PM CDT FRI OCT 16 1998 PROBLEM(S) OF THE DAY: POPS WILL THE CONVECTION BE SCATTERED OR NUMEROUS? NORTH-SOUTH BAND OF SHRA ACROSS CENTRAL OKLA THIS AFTN WILL EXPAND EWD TONIGHT. WILL GO WITH LIKELY POPS IN MOST AREAS AS LOW LVL WARM ADVECTION IN THE INCREASINGLY MOIST AIRMASS SHOULD LEAD TO WIDESPREAD ACTIVITY IN MOST AREAS. MODELS AGREE ON LIFTING MAIN SHORTWAVE ENERGY RAPIDLY NEWD ACROSS MO AND IA SAT NITE. RAIN CHANCES TO CONTINUE IN LIKELY CATEGORY DURING THE DAY SATURDAY AS COLD FRONT APPROACHES FROM NW. CUD BE A FEW STRONG STORMS IN THE HIGHLY SHEARED ENVIRONMENT...BUT LIMITED INSTBY WITH WIDESPREAD SHRA SHOULD LIMIT EXTENT OF SEVERE THREAT THIS FAR SOUTH. FRONT TO MOVE THROUGH MOST OF FCST AREA SATURDAY NIGHT...EXITING SOUTHEAST CORNER OF OKLAHOMA SUNDAY MORNING. MUCH DRIER AIR BEHIND BOUNDARY AND SUBSIDENCE BEHIND EXITING UPPER SYSTEM SHOULD LEAD TO DECREASING RAIN CHANCES AND PERHAPS CLEARING SKIES FROM NORTH TO SOUTH LATE SAT NITE OR SUN. MOISTURE WILL REMAIN ACROSS RED RIVER AREA THROUGH SUNDAY THOUGH...AND WILL CONTINUE WITH CHC POPS THAT AREA. IN EXTDD...RAIN CHANCES TO RETURN AREAWIDE ON MONDAY AND TUESDAY. WEDNESDAY SHOULD BE DRY AND COOLER BEHIND NEXT COOL SURGE PROGD TO MOVE ACROSS PLAINS. FCSTID = 9 TUL 66 75 49 64 / 70 70 40 10 FSM 65 77 58 69 / 60 80 60 30 MLC 70 76 55 68 / 70 70 60 20 BVO 65 75 47 63 / 70 70 40 10 FYV 66 74 53 65 / 70 80 60 10 IDB 69 78 64 72 / 40 50 60 40 BYV 65 74 51 64 / 70 80 60 10 MIO 66 74 50 64 / 70 80 50 10 MKO 66 75 50 65 / 70 70 40 10 F10 68 76 52 66 / 70 70 40 10 HHW 68 77 62 72 / 50 50 60 40 .TUL... OK...NONE. AR...NONE. -------------------- EXPERIMENTAL OUTPUT: GENERAL WEATHER EXPECTED NEXT 24 HOURS: CONVECTIVE PRECIP HAZARDOUS WEATHER EXPECTED NEXT 24 HOURS: NONE NGM CONFIDENCE: 7 ON A SCALE OF 0 TO 10 ETA CONFIDENCE: 7 ON A SCALE OF 0 TO 10 AVN CONFIDENCE: 7 ON A SCALE OF 0 TO 10 FCST CONFIDENCE: 8 ON A SCALE OF 0 TO 10
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 16, 8:31 PM CDT | Severe Thunderstorm Warning | TSA | Adair | 29 min |
| Oct 17, 12:52 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 38 min |
| Oct 17, 1:28 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 32 min |
| Oct 17, 1:55 PM CDT | Severe Thunderstorm Warning | TSA | Nowata, Washington | 50 min |
| Oct 17, 2:11 PM CDT | Severe Thunderstorm Warning | TSA | Nowata, Washington | 49 min |
| Oct 17, 2:11 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 49 min |
| Oct 17, 2:57 PM CDT | Tornado Warning | TSA | Osage, Tulsa, Washington | 33 min |
| Oct 17, 3:07 PM CDT | Tornado Warning | TSA | Nowata, Rogers | 53 min |
| Oct 17, 3:47 PM CDT | Severe Thunderstorm Warning | TSA | Nowata, Rogers, Washington | 43 min |
| Oct 17, 3:47 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 43 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.