Alert archive / Arkansas / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 65, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Apr 3, 1999, 2:47 AM CST for Crawford County, Franklin County, Sebastian County, Arkansas. It was in force for 43 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
- Apr 3, 1999, 2:47 AM CST (08:47 UTC)
- Expired
- Apr 3, 1999, 3:30 AM CST
- In force
- 43 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties
Counties Crawford County, AR, Franklin County, AR, Sebastian County, AR
The radar
The Western Arkansas radar (KSRX), 26 km from the middle of the area, began a volume at 08:49 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 |
|---|---|---|---|
| Apr 3, 3:20 AM CST | Hail 0.75 | Mountainburg, AR |
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, 8.8 hours before the alert went out and 166 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
- 862 J/kg
- Mixed-layer CIN
- -76 J/kg
- Mixed-layer LCL
- 1523 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 135 m²/s²
- 0-3 km storm-relative helicity
- 272 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 4.4
The text
As transmitted, in the capitals the NWS used until 2016.
999 WUUS54 KTSA 030848 RRA SVRTUL ARC033-047-131-030930- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 247 AM CST SAT APR 3 1999 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CRAWFORD COUNTY IN NORTHWEST ARKANSAS FRANKLIN COUNTY IN NORTHWEST ARKANSAS NORTHERN SEBASTIAN COUNTY IN WEST CENTRAL ARKANSAS * UNTIL 330 AM CST * AT 247 AM CST A SEVERE THUNDERSTORM WAS LOCATED 5 MILES WEST OF FORT SMITH...MOVING EAST AT 40 MPH. * SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... RUDY... FIGURE FIVE...DYER...ALMA...VAN BUREN...FORT SMITH...WIEDERKEHR VILLAGE...CASS...FERN...ALTUS...DENNING...BRANCH...MULBERRY AND OZARK HAIL TO THE SIZE OF NICKLES AND WIND GUSTS TO 60 MPH CAN BE EXPECTED IN THE WARNED AREA.
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 Apr 3, 12:53 AM CST, 1 hour 54 minutes earlier.
Area forecast discussion, Apr 3, 12:53 AM CST, 1 hour 54 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 1253 AM CST SAT APR 3 1999 JUST UPDATED ZONES TO ADD NEW WW HEADLINE TO APPROPRIATE ZONES. ALSO INCREASED OVERNIGHT LOWS AND INCREASED POPS IN THE ZONES WITH THE WATCH GIVEN SOLID NATURE OF THE LINE WHICH WILL APPROACH FROM THE WEST BEFORE SUNRISE. LATEST SURFACE ANALYSIS SHOWS LARGEST PRESSURE FALLS AND THE LOWEST LIFTED INDICES SOUTH ALONG THE RED RIVER...THOUGH MODERATE INSTABILITIES AND PRESSURE FALLS EXTEND NORTHEASTWARD ALL THE WAY INTO CENTRAL MO. MORE BETWEEN 400 AND 500 AM. FCSTID = 22 .TUL... OK...SEVERE THUNDERSTORM WATCH UNTIL 600 AM CST SATURDAY FOR ZONES OKZ054>056...OKTZ059>061...OKZ064>066. AR...NONE.
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 3, 3:10 AM CST | Severe Thunderstorm Warning | TSA | Crawford, Madison, Washington | 65 min |
| Apr 3, 3:37 AM CST | Tornado Warning | TSA | Crawford, Washington | 23 min |
| Apr 3, 3:53 AM CST | Tornado Warning | TSA | Madison | 52 min |
| Apr 3, 4:44 AM CST | Severe Thunderstorm Warning | TSA | Madison | 31 min |
| Apr 3, 6:39 AM CST | Flash Flood Warning | TSA | Crawford, Madison, Washington | 2 hr |
| Apr 3, 6:39 AM CST | Flash Flood Warning | TSA | Crawford, Madison, Washington | 66 min |
| Apr 3, 6:59 AM CST | Flash Flood Warning | TSA | Sebastian | 3 hr |
| Apr 3, 7:42 AM CST | Severe Thunderstorm Warning | TSA | Sebastian | 48 min |
| Apr 3, 7:47 AM CST | Severe Thunderstorm Warning | TSA | Franklin | 43 min |
| Apr 3, 1:35 PM CST | Severe Thunderstorm Warning | TSA | Carroll | 40 min |
| Apr 3, 1:55 PM CST | Severe Thunderstorm Warning | TSA | Madison | 35 min |
Nearby
Severe Thunderstorm Warnings in Arkansas, 1999Every severe thunderstorm warning in 1999
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.