Alert archive / Arkansas / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 497, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Nov 30, 1998, 12:12 AM CST for Crawford County, Arkansas; Sequoyah County, Oklahoma. It was in force for 48 min. 2 reports 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
- Nov 30, 1998, 12:12 AM CST (06:12 UTC)
- Expired
- Nov 30, 1998, 1:00 AM CST
- In force
- 48 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties
Counties Crawford County, AR, Sequoyah County, OK
The radar
The Western Arkansas radar (KSRX), 31 km from the middle of the area, began a volume at 06:14 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 |
|---|---|---|---|
| Nov 30, 12:15 AM CST | Thunderstorm Wind | Uniontown, AR | Barns were damaged by thunderstorm winds. |
| Nov 30, 12:30 AM CST | Thunderstorm Wind | Van Buren, AR | Sheriffs office reported large tree limbs blown down countywide. |
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, 6.2 hours before the alert went out and 164 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
- 2 J/kg
- Mixed-layer CIN
- -14 J/kg
- Mixed-layer LCL
- 1207 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 186 m²/s²
- 0-3 km storm-relative helicity
- 153 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 300612 RRA SVRTUL ARC033-OKC135-300700- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 1212 AM CST MON NOV 30 1998 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHERN CRAWFORD COUNTY IN NORTHWESTERN ARKANSAS NORTHEASTERN SEQUOYAH COUNTY IN EAST CENTRAL OKLAHOMA * UNTIL 100 AM CST * AT 1210 AM...RADAR DETECTED A SEVERE THUNDERSTORM NEAR SHORT... MOVING NORTHEAST AT 35 MPH. * SOME LOCATIONS AFFECTED INCLUDE... NATURAL DAM AND LEE CREEK HAIL TO THE SIZE OF DIMES AND WIND GUSTS TO 65 MPH CAN BE EXPECTED IN THE WARNED AREA. BE ALERT TO RAPIDLY CHANGING WEATHER CONDITIONS AS STORMS APPLROACH.
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 Nov 29, 8:45 PM CST, 3 hours 27 minutes earlier.
Area forecast discussion, Nov 29, 8:45 PM CST, 3 hours 27 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 845 PM CST SUN NOV 29 1998 SATELLITE LOOP INDICATES UPPER LEVEL SYSTEM CONTINUING TO MOVE RAPIDLY EASTWARD THIS EVENING. PRECIPITATION BAND HAS ORGANIZED INTO A LINE OF THUNDERSTORMS WHICH HAS BEEN MOVING EASTWARD AROUND 35 MPH. ACTIVITY HAS SPREAD EASTWARD FASTER THAN INDICATED BY THE EARLIER MODELS...SO WILL UPDATE TO ADJUST TIMING OF THE ONSET OF PR^ECIPITATION TONIGHT. OTHERWISE AFTERNOON FORECAST LOOKS GOOD AND WILL MAKE ONLY MINOR TWEAKS IF ANY ON UPDATE PACKAGE WHICH WILL BE RELEASTED SHORTLY AFTER 03Z. FCSTID = 11 .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 |
|---|---|---|---|---|
| Nov 30, 12:24 AM CST | Severe Thunderstorm Warning | TSA | Crawford, Sebastian | 51 min |
| Nov 30, 12:40 AM CST | Severe Thunderstorm Warning | TSA | Franklin, Madison | 50 min |
| Nov 30, 12:40 AM CST | Severe Thunderstorm Warning | TSA | Washington | 50 min |
Nearby
Severe Thunderstorm Warnings in Arkansas, 1998Severe 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.