Alert archive / Arkansas / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 104, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Apr 15, 1998, 6:31 PM CDT for Benton County, Carroll County, Arkansas. It was in force for 59 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 15, 1998, 6:31 PM CDT (23:31 UTC)
- Expired
- Apr 15, 1998, 7:30 PM CDT
- In force
- 59 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties
Counties Benton County, AR, Carroll County, AR
The radar
The Springfield radar (KSGF), 109 km from the middle of the area, began a volume at 23:31 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 15, 6:50 PM CDT | Hail 0.75 | Eureka Spgs, 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 15, 6:15 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Springfield, MO (KSGF), launched 12:00Z, 11.5 hours before the alert went out and 63 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
- 557 J/kg
- Mixed-layer CIN
- -28 J/kg
- Mixed-layer LCL
- 846 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 280 m²/s²
- 0-3 km storm-relative helicity
- 315 m²/s²
- Significant tornado parameter
- 1.1
- Supercell composite
- 4.9
The text
As transmitted, in the capitals the NWS used until 2016.
909 WUUS54 KTSA 152333 RRA SVRTUL ARC007-015-160030- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 631 PM CDT WED APR 15 1998 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EASTERN BENTON COUNTY IN NORTHWESTERN ARKANSAS WESTERN CARROLL COUNTY IN NORTHWESTERN ARKANSAS * UNTIL 730 PM CDT * AT 630 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED A SEVERE THUNDERSTORM JUST NORTH OF SEDALIA... MOVING NORTHEAST AT 40 MPH. * SOME LOCATIONS AFFECTED INCLUDE... BEAVER HOLIDAY ISLAND EUREKA SPRINGS HAIL TO THE SIZE OF NICKELS AND WIND GUSTS TO 60 CAN BE EXPECTED IN THE WARNED AREA. A TORNADO WATCH IS ALSO IN EFFECT. TORNADOES CAN DEVELOP SUDDENLY FROM SEVERE THUNDERSTORMS. BE ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS.
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 15, 3:45 PM CDT, 2 hours 46 minutes earlier.
Area forecast discussion, Apr 15, 3:45 PM CDT, 2 hours 46 minutes before
FPUS3 KTUL 152049 AFDTUL EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 345 PM CDT WED APR 15 1998 WK FRONT HAS STALLED JUST TO E AND S OF TUL THIS AFTN. SHRS AND ISLD TSTMS HV DEVELOPED MAINLY SOUTH OF THE BOUNDARY AND THEY WERE MOVG RAPIDLY NE. WINDS OVER SE OK AND WC AR HV BACKED A LTL DURING THE AFTN AND AS WAVE DEVELOPS AND MOVS ALG FRONT THIS EVENING MAY STILL SEE A FEW STG/SVR STORMS IN THIS AREA. NGM AND AVN BOTH SHOW VERY HIGH POPS TONIGHT OVER NRN SECTIONS OF FA. WL MAINTAIN CHC POPS NR THE FRONT TONIGHT AND WL ALSO LKLY INCLUDE POPS FOR NRN SECTIONS BUT NOT THE 70-80 POPS MOS IS INDICATING. MODELS IN FAIRLY GOOD AGREEMENT WITH MAIN FEATURES AND HV GENERALLY FOLLOWED THE ETA/AVN SOLUTION. AREA TO RMN IN SWLY FLOW WITH IMPULSES EJECTING OUT THRU THURSDAY. ETA KEEPS MOST PRECIP N OF FA DURING DAY ON THURSDAY BUT WL INCLUDE SLGT CHC POPS MOST AREAS. WITH CYCLONIC FLOW CLDS WL PROBABLY BE SLOW TO CLR...BUT SHUD DECREASE DURING THE DAY ON FRIDAY. FWC AND FAN TEMPS FAIRLY CLOSE AND GENERALLY IN LINE WITH GOING FCST PACKAGE - THUS WL STICK WITH AVN/NGM BLEND. SMITH PRELIMINARY NUMBERS SUBJECT TO LAST MINUTE CHANGES TUL 53 58 40 63 / 30 20 0 0 FSM 54 65 44 64 / 40 20 0 0 MLC 55 64 43 62 / 40 20 0 0 BVO 49 54 40 61 / 30 20 0 0 FYV 52 59 40 60 / 40 20 0 0 IDB 56 68 46 64 / 40 20 0 0 BYV 52 58 40 58 / 40 20 0 0 MIO 52 56 42 60 / 40 20 0 0 MKO 53 58 43 62 / 30 20 0 0 F10 53 58 43 62 / 30 20 0 0 HHW 56 68 46 64 / 40 20 0 0 .TUL... OK...NONE. AR...NONE.
In the hours before
Special weather statement, Apr 15, 1:00 PM CDT, 5 hours 31 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-161200- EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 100 PM CDT WED APR 15 1998 A FEW SEVERE THUNDERSTORMS ARE POSSIBLE ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS THIS AFTERNOON AND TONIGHT. SURFACE LOW PRESSURE WAS LOCATED IN WEST CENTRAL MISSOURI THIS AFTERNOON. A COLD FRONT EXTENDED SOUTHWEST FROM THE LOW ACROSS EASTERN OKLAHOMA INTO NORTH CENTRAL TEXAS. THE ENVIRONMENT AHEAD OF THIS FRONT HAS BECOME INCREASINGLY UNSTABLE DURING THE MORNING HOURS. DEWPOINTS ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS HAVE INCREASED INTO THE LOWER TO MID 60S IN MANY AREAS BEHIND GUSTY SOUTHWEST WINDS. LIFT SHOULD BE ADEQUATE FOR THUNDERSTORM DEVELOPMENT THIS AFTERNOON AND TONIGHT AS THE FRONT MOVES SLOWLY TO THE EAST BEING AIDED BY A STRONG UPPER LEVEL JET STREAM. WITH THIS ENVIRONMENT IN PLACE...A FEW SEVERE THUNDERSTORMS WILL BE POSSIBLE THIS AFTERNOON AND TONIGHT. THE MOST LIKELY AREA FOR THUNDERSTORM DEVELOPMENT WILL BE ALONG AND SOUTH OF A MIAMI TO OKMULGEE TO OKEMAH LINE. THE PRIMARY THREAT WITH ANY THUNDERSTORMS THAT DO DEVELOP WILL BE LARGE HAIL AND DAMAGING WINDS. EMERGENCY MANAGEMENT AGENCIES AND SPOTTER GROUPS SHOULD MONITOR THE WEATHER THIS AFTERNOON AND BE PREPARED FOR ACTIVATION.
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 15, 6:07 PM CDT | Severe Thunderstorm Warning | TSA | Washington | 53 min |
Nearby
Severe Thunderstorm Warnings in Arkansas, 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.