Alert archive / Arkansas / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 171, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at May 6, 1998, 1:56 AM CDT for Crawford County, Washington County, Arkansas; Adair County, Oklahoma. It was in force for 49 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- May 6, 1998, 1:56 AM CDT (06:56 UTC)
- Expired
- May 6, 1998, 2:45 AM CDT
- In force
- 49 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties
Counties Crawford County, AR, Washington County, AR, Adair County, OK
The nearest sounding before it
Norman, OK (KOUN), launched 00:00Z, 6.9 hours before the alert went out and 282 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
- 906 J/kg
- Mixed-layer CIN
- -22 J/kg
- Mixed-layer LCL
- 806 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 72 m²/s²
- 0-3 km storm-relative helicity
- 249 m²/s²
- Significant tornado parameter
- 0.9
- Supercell composite
- 4.5
The text
As transmitted, in the capitals the NWS used until 2016.
990 WUUS54 KTSA 060657 RRA SVRTUL ARC033-143-OKC001-060745- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 156 AM CDT WED MAY 6 1998 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHERN CRAWFORD COUNTY - NORTHWESTERN ARKANSAS SOUTHERN WASHINGTON COUNTY - NORTHWESTERN ARKANSAS SOUTHERN ADAIR COUNTY - EAST CENTRAL OKLAHOMA * UNTIL 245 AM CDT * AT 155 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED A SEVERE THUNDERSTORM 6 MILES SOUTHEAST OF STILWELL...MOVING EAST NORTHEAST AT 25 MPH. * SOME LOCATIONS AFFECTED INCLUDE... LEE CREEK EVANSVILLE STRICKLER WINSLOW HAIL TO THE SIZE OF NICKELS AND WIND GUSTS TO 60 MPH CAN BE EXPECTED IN THE WARNED AREA. BE ALERT TO RAPIDLY CHANGING WEATHER CONDITIONS AS STORMS APPROACH. WHEN THUNDERSTORMS APPROACH...TAKE COVER INSIDE A STURDY BUILDING. STAY AWAY FROM WINDOWS. TO PROTECT YOURSELF FROM LIGHTNING STAY OFF THE PHONE AND DONT USE HAND HELD ELECTRICAL APPLIANCES. MOTORISTS SHOULD NEVER DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
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 May 5, 9:25 PM CDT, 4 hours 31 minutes earlier.
Area forecast discussion, May 5, 9:25 PM CDT, 4 hours 31 minutes before
FPUS3 KTUL 060226 AFDTUL EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 925 PM CDT TUE MAY 5 1998 SCATTERED SHRA/TSRA HAVE CONTINUALLY GENERATED ACROSS XTRM NE OK THIS EVENING AND MOVED OFF INTO SW MO...WHERE LARGER AREA OF SHRA/TSRA IS DEVELOPING. BELIEVE THAT THIS AREA OF ACTIVITY WILL EVENTUALLY BUILD SOUTHWARD AS LLJ KICKS IN ACROSS WRN AR. WILL THEREFORE INCREASE POPS TO LIKELY ACROSS XTRM NE OK AND NW CORNER OF AR. WILL THEN TREND POPS DOWN TO 40S ACROSS SE OK. AM NOT CERTAIN WHETHER ACTIVITY WILL REACH SEVERE CRITERIA EVEN WITH STRENGTHENING LLJ...SO WILL NOT INTRODUCE SEVERE IN ZONES AT THIS TIME. AS FOR SOUTH CENTRAL OKLAHOMA STORMS...BELIEVE SWODY1 HAS GOOD HANDLE ON THE SITUATION SO WILL LEAVE CHANCE POPS GOING FOR SE OK AND NOT MENTION SEVERE. REST OF FORECAST IS IN PRETTY GOOD SHAPE...SO ONLY MINOR TWEAKS TO MINS ARE EXPECTED. FCSTID = 19 .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 |
|---|---|---|---|---|
| May 6, 2:42 AM CDT | Severe Thunderstorm Warning | TSA | LeFlore | 48 min |
| May 6, 3:26 AM CDT | Severe Thunderstorm Warning | TSA | LeFlore | 34 min |
| May 6, 3:56 AM CDT | Flash Flood Warning | TSA | LeFlore | 2 hr |
| May 6, 3:59 AM CDT | Severe Thunderstorm Warning | TSA | LeFlore | 46 min |
| May 6, 4:41 PM CDT | Severe Thunderstorm Warning | TSA | Okfuskee | 49 min |
| May 6, 5:07 PM CDT | Severe Thunderstorm Warning | TSA | Creek, Okmulgee | 53 min |
| May 6, 5:26 PM CDT | Severe Thunderstorm Warning | TSA | Muskogee | 64 min |
| May 6, 5:41 PM CDT | Tornado Warning | TSA | Okmulgee | 49 min |
| May 6, 5:49 PM CDT | Severe Thunderstorm Warning | TSA | Wagoner | 56 min |
| May 6, 5:55 PM CDT | Severe Thunderstorm Warning | TSA | Creek, Tulsa | 65 min |
| May 6, 6:06 PM CDT | Severe Thunderstorm Warning | TSA | Muskogee | 24 min |
| May 6, 6:11 PM CDT | Severe Thunderstorm Warning | TSA | Osage, Washington | 64 min |
| May 6, 6:14 PM CDT | Tornado Warning | TSA | Muskogee | 46 min |
| May 6, 6:20 PM CDT | Tornado Warning | TSA | Nowata, Washington | 40 min |
| May 6, 6:29 PM CDT | Tornado Warning | TSA | McIntosh | 61 min |
| May 6, 6:36 PM CDT | Severe Thunderstorm Warning | TSA | Cherokee | 54 min |
| May 6, 6:38 PM CDT | Severe Thunderstorm Warning | TSA | Craig | 52 min |
| May 6, 6:43 PM CDT | Severe Thunderstorm Warning | TSA | Mayes, Rogers, Wagoner | 77 min |
| May 6, 6:54 PM CDT | Flash Flood Warning | TSA | Tulsa | 3 hr |
| May 6, 6:59 PM CDT | Severe Thunderstorm Warning | TSA | Creek | 61 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; the sounding from the Mesonet's radiosonde archive.