Alert archive / Arkansas / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 402, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Aug 9, 1998, 3:45 PM CDT for Benton County, Arkansas. It was in force for 30 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
- Aug 9, 1998, 3:45 PM CDT (20:45 UTC)
- Expired
- Aug 9, 1998, 4:15 PM CDT
- In force
- 30 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties
County Benton County, AR
The nearest sounding before it
Springfield, MO (KSGF), launched 12:00Z, 8.8 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
- 17 J/kg
- Mixed-layer CIN
- -152 J/kg
- Mixed-layer LCL
- 2070 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 73 m²/s²
- 0-3 km storm-relative helicity
- 135 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
539 WUUS54 KTSA 092046 RRA SVRTUL ARC007-092115- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 345 PM CDT SUN AUG 9 1998 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... BENTON COUNTY IN NORTHWESTERN ARKANSAS * UNTIL 415 PM CDT * AT 343 PM...RADAR DETECTED A SEVERE THUNDERSTORM 5 MILES NORTH OF SULPHUR SPRINGS...MOVING SOUTH AT 20 MPH. * SOME LOCATIONS AFFECTED INCLUDE... SULPHUR SPRINGS GRAVETTE HIWASSE HAIL TO THE SIZE OF DIMES 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 Aug 9, 11:18 AM CDT, 4 hours 27 minutes earlier.
Area forecast discussion, Aug 9, 11:18 AM CDT, 4 hours 27 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 1118 AM CDT SUN AUG 9 1998 PLAN ON UPDATING ZONES BY 1700Z TO REFLECT CURRENT AND EXPECTED RADAR TRENDS FOR THE AFTERNOON. CONVECTIVE CLUSTER CONTINUES TO MOVE SOUTH SOUTHEAST ACROSS SE KS AND NE OKLA THIS MORN...WITH SOME SIGNS OF A DIMINISHING TREND NOW OCCURRING. ACTIVITY DEVELOPED NEAR STRONG TEMPERATURE GRADIENT AT 700 MB...AIDED BY LOW LEVEL JET AND WEAK SHORTWAVE MOVING SE ACROSS KS. NEW ETA MODEL RUN DEPICTS VERY STRONG LIFT ALONG 310 KELVIN ISENTROPIC SURFACE ON INITIAL PANEL...WHICH IT FORECASTS TO RAPIDLY DISSIPATE ON 12 HOUR FORECAST THIS AFTERNOON. COULD BE REDEVELOPMENT OF MORE MID LEVEL CONVECTION ABOUT ANYWHERE THIS AFTERNOON GIVEN MODERATE INSTABILITY. MAY ALSO BE SOME SURFACE BASED THUNDERSTORMS ALONG OUTFLOW BOUNDARIES WHERE SURFACE TEMPERATURES WARM SUFFICIENTLY...MAINLY ACROSS NW ARK AND SE OKLA. FOR THIS UPDATZE...WILL CONCENTRATE CHANGES IN FIRST PERIOD BY LOWERING TEMPS IN RAIN COOLED REGIONS AND ADJUSTING POPS BASED ON LATEST RADAR IMAGERY. FCSTID = 9 .TUL... OK...NONE. AR...NONE.
In the hours before
Special weather statement, Aug 9, 1:00 PM CDT, 2 hours 45 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-101200- EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 100 PM CDT SUN AUG 9 1998 NO ORGANIZED SEVERE THUNDERSTORMS ARE EXPECTED OVER EASTERN OKLAHOMA OR NORTHWEST ARKANSAS THROUGH TONIGHT. HOWEVER...ISOLATED SEVERE THUNDERSTORMS WILL BE POSSIBLE THIS AFTERNOON AND AGAIN AFTER MIDNIGHT DUE TO AN UNSTABLE AIRMASS OVER THE AREA. THE MAIN THREAT OF SEVERE WEATHER WILL BE FROM HAIL AND STRONG DOWNBURST WINDS. ACTIVATION OF EMERGENCY MANAGEMENT AND STORM SPOTTER GROUPS FOR SEVERE WEATHER OPERATIONS WILL NOT LIKELY BE NEEDED DUE TO THE EXPECTED ISOLATED AND SHORT LIVED NATURE OF ANY SEVERE STORMS. THIS OUTLOOK IS INTENDED TO PROVIDE GUIDANCE INFORMATION TO EMERGENCY MANAGEMENT AGENCIES AND STORM SPOTTER GROUPS CONCERNING TORNADOES...SEVERE THUNDERSTORMS...HIGH WIND EVENTS...AND FLOODING. INFORMATION CONCERNING OTHER HAZARDS CAN BE FOTUND IN ADDITIONAL PRODUCTS ISSUED BY THE TULSA NATIONAL WEATHER SERVICE OFFICE. FOR MORE INFORMATION...VISIT THE NWS TULSA WORLD WIDE WEB PAGE AT WWW.NWSTULSA.NOAA.GOV.
Special weather statement, Aug 9, 1:00 PM CDT, 2 hours 45 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-101200- EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 100 PM CDT SUN AUG 9 1998 NO ORGANIZED SEVERE THUNDERSTORMS ARE EXPECTED OVER EASTERN OKLAHOMA OR NORTHWEST ARKANSAS THROUGH TONIGHT. HOWEVER...ISOLATED SEVERE THUNDERSTORMS WILL BE POSSIBLE THIS AFTERNOON AND AGAIN AFTER MIDNIGHT DUE TO AN UNSTABLE AIRMASS OVER THE AREA. THE MAIN THREAT OF SEVERE WEATHER WILL BE FROM HAIL AND STRONG DOWNBURST WINDS. ACTIVATION OF EMERGENCY MANAGEMENT AND STORM SPOTTER GROUPS FOR SEVERE WEATHER OPERATIONS WILL NOT LIKELY BE NEEDED DUE TO THE EXPECTED ISOLATED AND SHORT LIVED NATURE OF ANY SEVERE STORMS. THIS OUTLOOK IS INTENDED TO PROVIDE GUIDANCE INFORMATION TO EMERGENCY MANAGEMENT AGENCIES AND STORM SPOTTER GROUPS CONCERNING TORNADOES...SEVERE THUNDERSTORMS...HIGH WIND EVENTS...AND FLOODING. INFORMATION CONCERNING OTHER HAZARDS CAN BE FOTUND IN ADDITIONAL PRODUCTS ISSUED BY THE TULSA NATIONAL WEATHER SERVICE OFFICE. FOR MORE INFORMATION...VISIT THE NWS TULSA WORLD WIDE WEB PAGE AT WWW.NWSTULSA.NOAA.GOV.
Local storm report, Aug 9, 2:00 PM CDT, 1 hour 45 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
200 PM CDT SUN AUG 9 1998
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0337 PM COWETA OK 1.00 INCH HAIL
08/08/98 WAGONER REPORTED BY COWETA P.D.Local storm report, Aug 9, 2:05 PM CDT, 1 hour 40 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
205 PM CDT SUN AUG 9 1998
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0910 PM HOLLOW OK 60 MPH TSTM GUST
08/09/98 CRAIG REPORTED BY NWS COOP
OBSERVERNearby
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; the sounding from the Mesonet's radiosonde archive.