Alert archive / South Dakota / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 23, NWS Sioux Falls, SD

June 28, 1987Hutchinson County, McCook County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 28, 1987, 5:03 PM CDT for Hutchinson County, McCook County, South Dakota. It was in force for 57 min.

The area

The counties it named.

The facts

Issued: Jun 28, 1987, 5:03 PM CDT (22:03 UTC)
Expired: Jun 28, 1987, 6:00 PM CDT
In force: 57 min
Issued by: NWS Sioux Falls, SD
Area: Whole counties

Counties Hutchinson County, SD, McCook County, SD

The radar

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

The nearest sounding before it

Aberdeen, SD (KHON), launched 12:00Z, 10.1 hours before the alert went out and 169 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: 487 J/kg
Mixed-layer CIN: -222 J/kg
Mixed-layer LCL: 1671 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 101 m²/s²
0-3 km storm-relative helicity: 110 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.5

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, Jun 28, 2:42 PM CDT, 2 hours 21 minutes before

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE HURON SD
240 PM CDT SUN JUN 28 1987

...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR PORTIONS OF
CENTRAL AND EASTERN SOUTH DAKOTA UNTIL 9 PM CDT...

AT 230 PM CDT...THERE WERE WIDELY SCATTERED THUNDERSTORMS ACROSS
EASTERN SOUTH DAKOTA. THERE WERE ISOLATED INTENSE THUNDERSTORMS
WITH VERY HEAVY RAIN.

THE STRONGEST THUNDERSTORMS WERE IN A 25 MILE WIDE AREA EXTENDING FROM
40 cMILES SOUTHEAST OF PIERRE TO 55 MILES NORTHWEST OF HURON. ANOTHER
INTENSE THUNDERSTORM WAS 25 MILES SOUTHWEST OF WATERTOWN.

MOVEMENT WAS SOUTHEAST AT 35 MILES AN HOUR.
ORGISH

Special weather statement, Jun 28, 3:02 PM CDT, 2 hours 1 minute before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
300 PM CDT SUN JUN 28 1987

AT 3 PM CDT...THUNDERSTORMS...SOME OF THEM INTENSE WITH HEAVY RAIN
WERE OCCURRING OVER PARTS OF EASTERN SOUTH DAKOTA AND SOUTHWEST
MINNESOTA.  THE THUNDERSTORMS EXTENDED NORTH OF A LINE FROM ABOUT
40 MILES NORTHWEST OF SIOUX FALLS...NEAR CANOVA SOUTH DAKOTA...NORTH/
EAST TO ABOUT 100 MILES NORTHEAST OF SIOUX FALLS...NEAR REDWOOD FALLS
MINNESOTA.
t
THE HEAVIEST RAIN WAS OCCURRING ABOUT 80 MILES NORTH OF SIOUX FALLS...
JUST SOUTH OF WATERTOWN SOUTH DAKOTA.

THESE THUNDERSTORMS WERE MOVING EAST/SOUTHEAST AT ABOUT 30 MILES AN
HOUR.
GOLDEN

Special weather statement, Jun 28, 4:01 PM CDT, 1 hour 2 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
400 PM CDT SUN JUN 28 1987

AT 4 PM CDT...THUNDERSTORMS...SOME OF THEM INTENSE WITH HEAVY RAIN
WERE OCCURRING OVER PARTS OF EASTERN SOUTH DAKOTA AND SOUTHWEST
MINNESOTA.  THE THUNDERSTORMS EXTENDED NORTH OF A LINE FROM ABOUT
90 MILES SOUTHWEST OF SIOUX FALLS...NEAR PICKSTOWN SOUTH DAKOTA...
NORTHEAST TO ABOUT 100 MILES NORTHEAST OF SIOUX FALLS...JUST SOUTH OF
REDWOOD FAL*LS MINNESOTA.

THE HEAVIEST RAIN WAS OCCURRING ABOUT 20 MILES NORTHWEST OF SIOUX
FALLS...NEAR MADISON SOUTH DAKOTA.

THESE THUNDERSTORMS WERE MOVING EAST/SOUTHEAST AT ABOUT 30 MILES AN
HOUR.
GOLDEN

Special weather statement, Jun 28, 4:27 PM CDT, 36 minutes before

KFSD 282124

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
425 PM CDT SUN JUN 28 1987

...SEVERE THUNDERSTORM WARNING UNTIL 5 PM CDT FOR EASTERN AURORA
AND ALL OF DAVISON COUNTY OF SOUTH DAKOTA...
...SEVERE THUNDERSTORM WATCH UNTIL 9 PM CDT FOR A LARGE PART OF
EASTERN SOUTH DAKOTA...

AT 420 PM CDT RADAR SHOWED A LINE OF SEVERE THUNDERSTORMS FROM 20 MILES
NORTHWEST OF MITCHELL TO NEAR STICKNEY SOUTH DAKOTA MOVING EAST AT
25 MPH. LARGE HAIL...DAMAGING WINDS...AND HEAVY RAINS ARE LIKELY
WITH THESE STORMS AS THEY MOVE ACROSS EASTERN AURORA AND DAVISON
COUNTIES.

IN ADDITION...RADAR INDICATED AN INTENSE THUNDERSTORMS 100 MILES
WEST-NORTHWEST OF YANKTON SOUTH DAKOTA NEAR DIXON MOVING SOUTHEAST AT
20 MPH.
<
<
PERSONS ACROSS EASTER SOUTH DAKOTA...NORTHWEST IOWA AND SOUTHWEST
MINNESOTA SHOULD KEEP ABREAST OF THE LATEST WEATHER SITUATION
AND BE PREPARED TO GO TO A SAFE PLACE IF A WARNING IS ISSUED.
JANSECN

Special weather statement, Jun 28, 4:45 PM CDT, 18 minutes before

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Special weather statement, Jun 28, 4:50 PM CDT, 13 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 28, 4:06 PM CDT	Severe Thunderstorm Warning	FSD	Aurora, Davison	54 min
Jun 28, 4:51 PM CDT	Tornado Warning	FSD	Hanson, Hutchinson	24 min
Jun 28, 4:29 PM CDT	Severe Thunderstorm Warning	FSD	Pipestone, Rock	61 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 1987 Every severe thunderstorm warning in 1987

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.