Alert archive / South Dakota / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 77, NWS Aberdeen, SD

July 26, 1986Edmunds County, Potter County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Jul 26, 1986, 8:01 PM CDT for Edmunds County, Potter County, South Dakota. It was in force for 59 min.

The area

The counties it named.

The facts

Issued
Jul 26, 1986, 8:01 PM CDT (01:01 UTC)
Expired
Jul 26, 1986, 9:00 PM CDT
In force
59 min
Issued by
NWS Aberdeen, SD
Area
Whole counties

Counties Edmunds County, SD, Potter 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 00:00Z, 1.0 hours before the alert went out and 101 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-pSkew-T log-p diagram, Aberdeen, SD at 00:00Z on 1986-07-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1680 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Aberdeen, SD at 00:00Z on 1986-07-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 36 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1680 J/kg
Mixed-layer CIN
-48 J/kg
Mixed-layer LCL
1819 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
36 m²/s²
0-3 km storm-relative helicity
63 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.8

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

Local storm report, Jul 26, 7:13 PM CDT, 48 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
710 PM CDT SAT JUL 26 1986

TIME           LOCATION AND EVENT
320 PM MDT     1 WEST OF MCLAUGHLIN..MARBLE SIZE HAIL.
348 PM MDT     MCLAUGHLIN..PEA TO MARBLE SIZE HAIL.
629 PM CDT     MOBRIDGE..50 MPH WIND.
634 PM CDT     MOBRIDGE WATER PLANT..PEA SIZE HAIL.
545 PM MDT     WHITEHORSE..CENTRAL DEWEY..PRARIE FIRE CAUSED BY
               LIGHTNING.
ALL REPORTS WERE FROM CIVIL DEFENSE DIRECTOR IN MOBRIDGE.

KEEFE

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 26, 7:34 PM CDTTornado WarningABRWalworth26 min
Jul 27, 1:02 PM CDTSevere Thunderstorm WarningABRKingsbury28 min
Jul 27, 1:05 PM CDTTornado WarningABRDeuel25 min
Jul 27, 1:49 PM CDTSevere Thunderstorm WarningABRDewey56 min
Jul 27, 5:07 PM CDTSevere Thunderstorm WarningABRHand, Hyde68 min
Jul 27, 6:21 PM CDTSevere Thunderstorm WarningABRJerauld69 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 1986Every 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; the sounding from the Mesonet's radiosonde archive.