Alert archive / South Dakota / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 66, NWS Aberdeen, SD

July 25, 1986Hand County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Jul 25, 1986, 6:17 PM CDT for Hand County, South Dakota. It was in force for 58 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 25, 1986, 6:17 PM CDT (23:17 UTC)
Expired: Jul 25, 1986, 7:15 PM CDT
In force: 58 min
Issued by: NWS Aberdeen, SD
Area: Whole counties

County Hand 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 25, 6:25 PM CDT	Hail 1.75	Hand, 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 12:00Z, 11.3 hours before the alert went out and 62 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: 19 J/kg
Mixed-layer CIN: -143 J/kg
Mixed-layer LCL: 1274 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: -28 m²/s²
0-3 km storm-relative helicity: 19 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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

Special weather statement, Jul 25, 2:56 PM CDT, 3 hours 21 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ABERDEEN SD
255 PM CDT FRI JUL 25 1986

...THUNDERSTORMS DEVELOPING OVER NORTH CENTRAL SOUTH DAKOTA...

AT 250 PM CDT RADAR INDICATED RAPIDLY DEVELOPING THUNDERSTORM ACTIVITY
OVER THE NORTH CENTRAL SOUTH DAKOTA COUNTIES OF WALWORTH..POTTER AND
FAULK MOVING EAST AT 15 MPH.

PERSONS WITHIN THE PATH OF THESE THUNDERSTORMS CAN EXPECT PERIODS OF
BRIEF HEAVY RAIN..SMALL HAIL IS POSSIBLE AND GUSTY pSURFACE WIND FOR
THE NEXT COUPLE OF HOURS TIL 5 PM CDT.

THESE THUNDERSORMS WILL MOVE ACROSS THE FOLLOWING COUNTIES BETWEEN
3 PM AND 5 PM CDT..SOUTHERN MCPHERSON..EDMUNDS AND WEST PORTIONS OF
SPINK AND BROWN COUNTIES.
 STUDNICKA

Local storm report, Jul 25, 4:23 PM CDT, 1 hour 54 minutes before

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Special weather statement, Jul 25, 4:44 PM CDT, 1 hour 33 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 25, 3:34 PM CDT	Tornado Warning	ABR	Walworth	26 min
Jul 25, 4:05 PM CDT	Tornado Warning	ABR	Walworth	25 min
Jul 25, 4:33 PM CDT	Severe Thunderstorm Warning	ABR	Walworth	57 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 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.