Alert archive / Arkansas / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 387, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Jul 11, 1998, 9:59 PM CDT for Sebastian County, Arkansas. It was in force for 31 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
- Jul 11, 1998, 9:59 PM CDT (02:59 UTC)
- Expired
- Jul 11, 1998, 10:30 PM CDT
- In force
- 31 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties
County Sebastian County, AR
The nearest sounding before it
Springfield, MO (KSGF), launched 00:00Z, 3.0 hours before the alert went out and 194 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
- 548 J/kg
- Mixed-layer CIN
- -10 J/kg
- Mixed-layer LCL
- 1035 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 32 m²/s²
- 0-3 km storm-relative helicity
- 34 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
469 WUUS54 KTSA 120300 RRA SVRTUL ARC131-120330- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 959 PM CDT SAT JUL 11 1998 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SEBASTIAN COUNTY IN WEST CENTRAL ARKANSAS * UNTIL 1030 PM CDT * AT 959 PM...A SEVERE THUNDERSTORM WAS LOCATED 4 MILES WEST OF GREENWOOD...MOVING EAST AT 20 MPH. * SOME LOCATIONS AFFECTED INCLUDE... GREENWOOD 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 Jul 11, 9:50 PM CDT, 9 minutes earlier.
Area forecast discussion, Jul 11, 9:50 PM CDT, 9 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 950 PM CDT SAT JUL 11 1998 AS HAPPENED THE PAST FEW EVENINGS A FEW STORMS STRENGTHENED RIGHT AROUND 8 PM AND THEN WEAKENED AGAIN AFTER 9 PM. THERE IS STILL A CLUSTER OF STRONG STORMS IN WEST CENTRAL ARKANSAS AND PARTS OF SOUTHEAST OKLAHOMA SLOWLY MOVING OFF TO THE EAST. FURTHER NORTH SCATTERED SHOWERS AND THUNDERSTORMS CONTINUE TO DEVELOP. SHORT WAVE LOOKS TO BE SLOWLY TRANSLATING EAST INTO FORECAST AREA AND A QUICK LOOK AT THE LATEST MODELS SHOW THAT IT IS STILL EXPECTED TO CONTINUE THIS SLOW TREK. SUSPECT THAT SHOWERS AND THUNDERSTORMS WILL KEEP DEVELOPING AND MOVING OFF TO THE EAST/SOUTHEAST OVERNIGHT AHEAD OF THE SHORT WAVE IN THE AXIS OF DEEPER MOISTURE. THUS WILL CONTINUE WITH LIKELY PROBABILITY OF PRECIPITATION IN THE NORTHEASTERN ZONES. LOOKS LIKE ONLY A LOW CHANCE FURTHER TO THE WEST ACROSS PARTS OF EASTERN OKLAHOMA. WILL DROP THE MENTION OF HEAVY RAIN IN THE ZONES SINCE AN ORGANIZED AREA OF HEAVY RAINFALL DOES NOT APPEAR TO BE IN THE OFFERING TONIGHT. .TUL... OK...NONE. AR...NONE.
In the hours before
Local storm report, Jul 11, 9:24 PM CDT, 35 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
924 PM CDT SAT JUL 11 1998
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0844 PM 2W SUMMERFIELD OK 1 INCH HAIL
07/11/98 LE FLORENearby
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.