Alert archive / Arkansas / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 34, NWS Tulsa, OK

April 7, 1986Benton County, Arkansas

NWS Tulsa, OK issued this severe thunderstorm warning at Apr 7, 1986, 11:35 PM CST for Benton County, Arkansas. It was in force for 55 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: Apr 7, 1986, 11:35 PM CST (05:35 UTC)
Expired: Apr 8, 1986, 12:30 AM CST
In force: 55 min
Issued by: NWS Tulsa, OK
Area: Whole counties

County Benton County, AR

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

What was reported inside it

Time	Report	Where	Remark
Apr 7, 11:47 PM CST	Hail 0.75	Benton, AR
Apr 7, 11:55 PM CST	Hail 0.75	Benton, 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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Springfield, MO (KUMN), launched 00:00Z, 5.6 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1744 J/kg
Mixed-layer CIN: -19 J/kg
Mixed-layer LCL: 1228 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 128 m²/s²
0-3 km storm-relative helicity: 229 m²/s²
Significant tornado parameter: 1.7
Supercell composite: 10.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KFSM 080535
SVRFSM
ARC007-080630-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE FORT SMITH AR
1135 PM CST MON APR 7 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 1230 AM CST FOR PEOPLE IN THE FOLLOWING 
COUNTY OF

ARKANSAS...BENTON

AT 1135 PM A SEVERE THUNDERSTORM WAS INDICATED BY RADAR 10
MILES NORTHWEST OF BELLA VISTA ARKANSASr MOVING TOWARD THE
SOUTHEAST AT 50 MPH.

THIS IS A LARGE AND DANGEROUS STORM AND RESIDENTS SHOULD TAKE
SHELTER IMMEDIATELY.

IF YOU OSBSERVE ANY LARGE HAIL OR STRONG WINDS PLEASE RELAY YOUR
REPORT TO THE NEAREST LAW ENFORCEMENT AGENCY.

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.

In the hours before

Local storm report, Apr 7, 7:58 PM CST, 3 hours 37 minutes before

STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
800 PM CST MON APR 7 1986

 TIME           EVENT
 455   PM CST   3/4 INCHE HAIL  5 MILES EAST OF NOWATA,OK.( OHP )

 544   PM CST   TORNADO 3 MILES NORTH OF ADAIR OK.  (HAM WEA. OBS.)

 555   PM CST   TORNADO JUST NE OF ADAIR OK.  (OHP)
                TREES DOWN AND A CAR OVERTURNED JUST NORTHWEST OF
                ADAIR, OK.   ( HAM WEA. OBS. )

 607   PM CST   SOLFBALL SIZE HAIL AT PENSACOLA, OK (HAM WEA. OBS.)

 608   PM CST   GOLFBALL SIZE HAIL OUTSIDE OF VINITA, OK  (OHP)

 617   PM CST   TREES DOWN AND FLOODING AT LANGLEY, OK  (HAM WEA. OBS. )

 704   PM CST   1 INCHE HAIL NEAR COLCORD, OK      (WSO, FSM)
 720   PM CST   3/4 INCHES HAIL NEAR WEST SILOAM SPRINGS, OK  (WSO,FSM)

The office that day

Everything else NWS Tulsa, OK issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 7, 6:46 PM CST	Severe Thunderstorm Warning	TSA	Benton, Washington	59 min
Apr 7, 7:49 PM CST	Severe Thunderstorm Warning	TSA	Benton, Washington	56 min
Apr 7, 8:45 PM CST	Severe Thunderstorm Warning	TSA	Benton, Madison	60 min
Apr 7, 9:46 PM CST	Severe Thunderstorm Warning	TSA	Benton, Madison	59 min
Apr 7, 10:02 PM CST	Tornado Warning	TSA	Benton	58 min
Apr 7, 10:16 PM CST	Tornado Warning	TSA	Madison, Washington	59 min
Apr 7, 11:16 PM CST	Severe Thunderstorm Warning	TSA	Franklin, Madison	44 min
Apr 7, 11:32 PM CST	Flash Flood Warning	TSA	Benton, Madison	3 hr
Apr 8, 12:44 AM CST	Severe Thunderstorm Warning	TSA	Washington	61 min
Apr 8, 1:01 AM CST	Severe Thunderstorm Warning	TSA	Johnson	59 min
Apr 8, 1:14 AM CST	Severe Thunderstorm Warning	TSA	Franklin, Logan	61 min
Apr 8, 1:14 AM CST	Severe Thunderstorm Warning	TSA	Crawford	61 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 1986 Every severe thunderstorm warning in 1986

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.