Alert archive / Arkansas / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 370, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Jun 30, 1998, 4:30 AM CDT for Benton County, Arkansas. It was in force for 60 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
- Jun 30, 1998, 4:30 AM CDT (09:30 UTC)
- Expired
- Jun 30, 1998, 5:30 AM CDT
- In force
- 60 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties
County Benton County, AR
The radar
The Western Arkansas radar (KSRX), 117 km from the middle of the area, began a volume at 09:31 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 |
|---|---|---|---|
| Jun 30, 4:30 AM CDT | Thunderstorm Wind | Sulphur Spgs, AR | Several trees were blown down in Sulphur Springs, and several streets were blocked by downed trees and limbs. SH 59 south of Sulphur Springs was blocked for about 30 minutes by a fallen tree. |
| Jun 30, 4:30 AM CDT | Thunderstorm Wind | Gravette, AR | A large oak tree was blown into the front of a residence on Third Avenue SW in Gravette. Luckily, the family residing in the house was out of town, and there were no injuries. In Gravette, several trees and limbs were blown down, blocking traffic on several |
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, 9.5 hours before the alert went out and 74 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
- 1641 J/kg
- Mixed-layer CIN
- -80 J/kg
- Mixed-layer LCL
- 1639 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 47 m²/s²
- 0-3 km storm-relative helicity
- 89 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 4.4
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KTUL 300929 RRA SVRTUL ARC007-301030- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 430 AM CDT TUE JUN 30 1998 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... BENTON COUNTY IN NORTHWESTERN ARKANSAS * UNTIL 530 AM CDT * AT 426 AM...NATIONAL WEATHER SERVICE RADAR DETECTED A CLUSTER OF SEVERE THUNDERSTORMS 12 MILES NORTHWEST OF BENTONVILLE...MOVING SOUTHEAST AT 30 MPH. * SOME LOCATIONS AFFECTED INCLUDE... BENTONVILLE ROGERS 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.
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 Jun 30, 4:00 AM CDT, 30 minutes earlier.
Area forecast discussion, Jun 30, 4:00 AM CDT, 30 minutes before
FPUS3 KTUL 300906 AFDTUL EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 400 AM CDT TUE JUN 30 1998 PROBLEM(S) OF THE DAY: WILL THERE BE SEVERE CONVECTION? SE KS CONVECTION IS FLIRTING WITH FAR NE SECTIONS OF CWA...AND HAS PUSHED OUT AN OUTFLOW BNDRY ACRS NE OK TNGT. OUTFLOW WILL PROBABLY WASH OUT TDA...ALTHO SFC BNDRY CURRENTLY STRETCHING FM NRN MO INTO SRN KS IS PROGD TO SAG SLOWLY S INTO NE OK/NW AR THIS AFTN. WITH CURRENT CONVECTION AND PSBLTY OF REDEVELOPMENT LTR THIS AFTN...WL CARRY LO POPS FOR NRN PARTS OF FA. COMBINATION OF UPSLOPE FLOW AND SFC CONVERGENCE SHUD ALLOW TSRA TO FIRE ACRS ERN CO/WRN KS BY LATE AFTN. THIS ACTIVITY SHUD EVENTUALLY FORM INTO A MCS...AND MV ESE ALG H85-H3 THICKNESS INTO NE OK AND NW AR THIS EVENING AND OVRNGT. CUD SEE SOME SVR WX IN FORM OF DAMAGING WINDS...BUT NO PLANS TO MENTION SVR IN FCST FOR NOW. FOR WED...SFC BNDRY SHUD LIE NW TO SE ACRS FA. MDLS SHOW DECENT INSTABILITY/MSTR POOLED ALG FNT ALONG WITH A WELL DEFINED VORT MAX MVG INTO SE KS/NE OK...SO WL CONTINUE WITH LOW POPS. SFC FNT SHUD EVENTUALLY LIFT N WED NGT. AVN HINTS AT ANOTHER PSBL MCS ACRS KS...WITH ACTIVITY MVG INTO FAR NE OK LATE. DONT HAVE MUCH CONFIDENCE AT THIS TIME FRAME...SO WL GO WITH LOW CHC POPS...MAINLY OVR NRN SECTIONS. FCSTID = 18 TUL 96 74 93 76 / 20 30 30 20 FSM 96 75 94 74 / 10 20 30 20 MLC 96 75 95 76 / 10 10 20 20 BVO 96 72 92 74 / 20 40 30 30 FYV 91 69 89 69 / 20 30 30 30 IDB 97 72 95 73 / 10 10 10 10 BYV 91 69 89 69 / 20 30 30 30 MIO 94 71 91 71 / 20 40 30 30 MKO 96 75 94 76 / 10 20 20 20 F10 96 75 94 76 / 10 20 20 20 HHW 97 72 95 73 / 10 10 10 10 .TUL... OK...NONE. AR...NONE. -------------------- EXPERIMENTAL OUTPUT: GENERAL WEATHER EXPECTED NEXT 24 HOURS: CONVECTIVE PRECIP HAZARDOUS WEATHER EXPECTED NEXT 24 HOURS: SLIGHT CHANCE SEVERE THUNDERSTORMS NGM CONFIDENCE: 6 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: 7 ON A SCALE OF 0 TO 10
In the hours before
Special weather statement, Jun 30, 4:30 AM CDT, 0 minutes before
OKZ060-300908-
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
430 AM CDT TUE JUN 30 1998
THE HEAT ADVISORY HAS BEEN CANCELLED FOR THE FOLLOWING COUNTIES
EASTERN OKLAHOMA...
TULSA.
A WEAK COLD FRONT IS EXPECTED TO MOVE INTO NORTHEAST OKLAHOMA
BY THIS AFTERNOON...PROVIDING SOME SLIGHT RELIEF TO THE
OPPRESSIVE HEAT OF THE PAST FEW DAYS. HEAT INDICES SHOULD STILL
BE AROUND 100 DEGREES THIS AFTERNOON...BUT THIS IS BELOW THE
HEAT ADVISORY CRITERIA.The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 30, 6:31 AM CDT | Severe Thunderstorm Warning | TSA | Benton | 59 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.