Alert archive / South Dakota / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 58, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 21, 1986, 9:33 PM CDT for Lake County, McCook County, South Dakota. It was in force for 57 min.
The area
The counties it named.
The facts
- Issued
- Jun 21, 1986, 9:33 PM CDT (02:33 UTC)
- Expired
- Jun 21, 1986, 10:30 PM CDT
- In force
- 57 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
Counties Lake 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 00:00Z, 2.6 hours before the alert went out and 149 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.
- Mixed-layer CAPE
- 3109 J/kg
- Mixed-layer CIN
- -103 J/kg
- Mixed-layer LCL
- 1356 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 136 m²/s²
- 0-3 km storm-relative helicity
- 125 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 4.6
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 21, 7:20 PM CDT, 2 hours 13 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 715 PM CDT SAT JUN 21 1986 ...SEVERE THUNDERSTORM WATCH 284 CONTINUES UNTIL 1000 PM FOR MUCH OF EASTERN SOUTH DAKOTA... AT 715 PM CDT AN INTENSE THUNDERSTORM WAS LOCATED 35 MILES NORTHEAST OF SIOUX FALLS JUST EAST OF HOWARD. THIS INTENSE THUNDERSTORM WAS MOVING EAST AT 20 MPH AND WAS LIKELY PRODUCING VERY HEAVY RAINS.. GUSTY WINDS TO PERHAPS 45 MPH..AND SMALL HAIL. THIS STORM WILL HIT THE MADISON CITY AREA BY 800 PM CDT...BUT WILL ALSO AFFECT OTHER CITIES IN LAKE COUNTY. KAPELA
Local storm report, Jun 21, 8:16 PM CDT, 1 hour 17 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
815 PM CDT SAT JUN 21 1986
535 PM CDT FUNNEL CLOUD REPORTED NEAR CANOVA
540 PM CDT ONE INCH DIAMETER HAIL AT HOWARD
725 PM CDT * FUNNEL CLOUD REPORTED AT CANOVA
802 PM CDT ONE HALF INCH DIAMETER HAIL AT JUNIUS AND 6 TO 8
MILES SOUTHWEST OF MADISON
WEILANDSpecial weather statement, Jun 21, 9:03 PM CDT, 30 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 900 PM CDT SAT JUN 21 1986 ..TORNADO WATCH NUMBER 284 CANCELLED FOR MUCH OF EASTERN SOUTH DAKOTA... THE TORNADO WATCHV THAT WAS IN EFFECT FOR MUCH OF EASTERN SOUTH DAKOTA UNTIL 1000 PM CDT HAS BEEN CANCELLED. A SEVERE THUNDERSTORM WATCH HAS BEEN ISSUED IN ITS PLACE FOR SOUTHEAST SOUTH DAKOTA..SOUTHWEST MINNESOTA AND NORTHWEST IOWA. WEILAND
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 21, 7:26 PM CDT | Severe Thunderstorm Warning | FSD | Lake | 64 min |
| Jun 21, 8:32 PM CDT | Severe Thunderstorm Warning | FSD | Lake, Moody | 58 min |
| Jun 21, 9:15 PM CDT | Severe Thunderstorm Warning | FSD | Minnehaha, Moody | 60 min |
| Jun 21, 9:58 PM CDT | Severe Thunderstorm Warning | FSD | Tripp | 62 min |
| Jun 21, 10:44 PM CDT | Severe Thunderstorm Warning | FSD | Minnehaha | 61 min |
| Jun 22, 12:06 AM CDT | Severe Thunderstorm Warning | FSD | Clay, Lincoln, Turner, Yankton | 69 min |
| Jun 22, 12:06 AM CDT | Severe Thunderstorm Warning | FSD | Hutchinson, McCook, Minnehaha | 69 min |
| Jun 22, 12:07 AM CDT | Severe Thunderstorm Warning | FSD | Union | 68 min |
| Jun 21, 9:39 PM CDT | Severe Thunderstorm Warning | FSD | Pipestone, Rock | 66 min |
| Jun 21, 10:31 PM CDT | Severe Thunderstorm Warning | FSD | Nobles | 59 min |
| Jun 22, 12:17 AM CDT | Severe Thunderstorm Warning | FSD | Jackson | 58 min |
| Jun 22, 12:17 AM CDT | Severe Thunderstorm Warning | FSD | Lyon, Osceola, Sioux | 58 min |
| Jun 22, 12:35 AM CDT | Severe Thunderstorm Warning | FSD | Plymouth, Woodbury | 55 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.