Alert archive / South Dakota / Tornado Warnings in 1986

Tornado Warning 24, NWS Aberdeen, SD

July 30, 1986Deuel County, Grant County, South Dakota

NWS Aberdeen, SD issued this tornado warning at Jul 30, 1986, 12:28 AM CDT for Deuel County, Grant County, South Dakota. It was in force for 32 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: Jul 30, 1986, 12:28 AM CDT (05:28 UTC)
Expired: Jul 30, 1986, 1:00 AM CDT
In force: 32 min
Issued by: NWS Aberdeen, SD
Area: Whole counties

Counties Deuel County, SD, Grant County, SD

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
Jul 30, 12:32 AM CDT	Hail 2	Deuel, SD

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

Aberdeen, SD (KHON), launched 00:00Z, 5.5 hours before the alert went out and 133 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: 3602 J/kg
Mixed-layer CIN: -50 J/kg
Mixed-layer LCL: 1336 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 103 m²/s²
0-3 km storm-relative helicity: 243 m²/s²
Significant tornado parameter: 3.5
Supercell composite: 24.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KHON 300528
TORHON
SDC039-051-300600-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING
NATIONAL WEATHER SERVICE HURON SD
1228 AM CDT WED JUL 30 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 100 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF

NORTHEAST SOUTH DAKOTA...NORTHEAST DEUEL AND SOUTHEAST GRANT

SOME OF THE CITIES INCLUDED IN THE WARNING AREA ARE ALBEE AND
REVILLO.

AT 1220 AM CDT RADAR INDICATED A POSSIBLE TORNADO 25 MILES EAST OF
 WATERTOWN MOVING SOUTHEAST AT 30 MILES AN HOUR.

 THE STORM IS EXPECTED TO MOVE OUT OF SOUTH DAKOTA AROUND 1 AM CDT.

IF YOU ARE IN THE PATH OF THIS TORNADO...YOU SHOULD GO TO A BASEMENT
SHELTER IF AVAILABLE. OTHERWISE GO TO A CENTRAL INTERIOR ROOM ON THE
LOWEST FLOOR POSSIBLE. CARS AND MOBILE HOMES SHOULD BE ABANDONED FOR
A REINFORCED BUILDING.

ORGISH/SPRINGER

What forecasters said that day

The local office's own words before this tornado 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, Jul 29, 11:14 PM CDT, 1 hour 14 minutes before

STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
1110 PM CDT TUE JUL 29 1986

TIME          EVENT AND LOCATION
825 PM CDT    FERNEY (BROWN COUNTY) PEA SIZE HAIL.
826 PM CDT    2 MILES SOUTH OF ABERDEEN AIRPORT. PEA SIZE HAIL.
900 PM CDT    BUTLER (DAY COUNTY) HEAVY RAIN AND MARBLE SIZE HAIL.
902 PM CDT    8 MILES SOUTHWEST BRISTOL (DAY COUNTY) GOLFBALL HAIL.
915 PM CDT    WEBSTER (DAY COUNTY) MARBLE SIZE HAIL.
1000 PM CDT   WEBSTER (DAY COUNTY) VERY HEAVY RAIN WIND TO 40 MPH.
1000 PM CDT   BUTLER (DAY COUNTY) VERY HEAVY RAIN.
1020 PM CDT   POLLOCK (CAMPBELL COUNTY) MARBLE SIZE HAIL.
935 PM CDT    4 MILES SOUTHEAST FERNEY (BROWN COUNTY) GOLFBALL TO
              BASEBALL HAIL.
110h5 PM CDT   LILY (DAY COUNTY) ONE INCH TO GOLFBALL SIZE HAIL,
              GROUND COVERED.
 STUDNICKA

The office that day

Everything else NWS Aberdeen, SD issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 29, 8:00 PM CDT	Severe Thunderstorm Warning	ABR	Clark, Hamlin, Kingsbury	60 min
Jul 29, 8:26 PM CDT	Severe Thunderstorm Warning	ABR	Day	64 min
Jul 29, 8:56 PM CDT	Severe Thunderstorm Warning	ABR	Hamlin, Kingsbury	64 min
Jul 29, 8:56 PM CDT	Severe Thunderstorm Warning	ABR	Deuel	64 min
Jul 29, 10:00 PM CDT	Severe Thunderstorm Warning	ABR	Deuel	30 min
Jul 29, 10:03 PM CDT	Severe Thunderstorm Warning	ABR	Day	57 min
Jul 29, 10:08 PM CDT	Severe Thunderstorm Warning	ABR	Corson	67 min
Jul 29, 10:17 PM CDT	Severe Thunderstorm Warning	ABR	Campbell	58 min
Jul 29, 10:19 PM CDT	Severe Thunderstorm Warning	ABR	Codington, Grant	56 min
Jul 29, 10:30 PM CDT	Tornado Warning	ABR	Clark	30 min
Jul 29, 10:50 PM CDT	Severe Thunderstorm Warning	ABR	Walworth	55 min
Jul 29, 10:52 PM CDT	Tornado Warning	ABR	Codington	38 min
Jul 29, 11:00 PM CDT	Severe Thunderstorm Warning	ABR	Day	60 min
Jul 29, 11:11 PM CDT	Severe Thunderstorm Warning	ABR	Campbell	64 min
Jul 29, 11:21 PM CDT	Tornado Warning	ABR	Codington	39 min
Jul 29, 11:36 PM CDT	Severe Thunderstorm Warning	ABR	Campbell, McPherson	69 min
Jul 29, 11:58 PM CDT	Tornado Warning	ABR	Codington, Deuel, Hamlin	32 min
Jul 30, 2:46 AM CDT	Severe Thunderstorm Warning	ABR	Faulk, Spink	59 min

Nearby

Tornado Warnings in South Dakota, 1986 Every tornado warning in 1986 Tornadoes 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.