Alert archive / Iowa / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 84, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 29, 1986, 6:17 PM CDT for Sioux County, Iowa; Lincoln County, South Dakota. It was in force for 58 min.
The area
The counties it named.
The facts
- Issued
- Jun 29, 1986, 6:17 PM CDT (23:17 UTC)
- Expired
- Jun 29, 1986, 7:15 PM CDT
- In force
- 58 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
Counties Sioux County, IA, Lincoln 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
Omaha, NE (KOAX), launched 12:00Z, 11.3 hours before the alert went out and 207 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 3641 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 49 m²/s²
- 0-3 km storm-relative helicity
- 49 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KFSD 292317 SVRFSD SDC083-IAC167-300015- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 617 PM CDT SUN JUN 29 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 715 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF SOUTHEAST SOUTH DAKOTA...SOUTHERN LINCOLN NORTHWEST IOWA...WESTERN SIOUX SOME OF THE CITIES INCLUDED IN SOUTHEAST SOUTH DAKOTA ARE BERESFORD ..FAIRVIEW. IN NORTHWEST IOWA..SIOUX CNTER. AT 610 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM 30 MILES SOUTHWEST OF SIOUX FALLS SOUTH DAKOTA MOVING EAST AT 20 MPH. IF YOU ARE IN THE PATH OF THIS STORM..YOU SHOULD GET TO A REINFORCED SHELTER. A SEVERE THUNDERSTORM PRODUCES DAMAGING WINDS IN EXCESS OF 60 MPH..HAIL 3/4 INCH OR LARGER..DEADLY LIGHTNING..AND HEAVY RAIN THAT CAN QUICKLY FLOOD A LOW LYING AREA. THESE STORMS CAN AND OCCASIONALLY DO PRODUCE A TORNADO WITH LITTLE OR NO ADVANCE WARNING SO BE ON THE LOOKOUT. ANDERSON
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 29, 1:51 PM CDT, 4 hours 26 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 150 PM CDT SUN JUN 29 1986 AT 130 PM CDT...SCATTERED INTENSE THUNDERSTORMS WERE DEVELOPING IN SOUTHCENTRAL AND SOUTHEASTERN SOUTH DAKOTA. THESE THUNDERSTORMS WERE IN 20 MILE WIDE AREA EXTENDING FROM WINNER 30 MILES EAST OF HURON... NEAR DESMET. THE STRONGEST THUNDERSTORMS WERE LOCATED 35 MILES WEST OF MITCHELL...10 MILES SOUTHWEST OF PLANKINTON...TO 20 MILES NORTHWEST OF MITCHELL. ANOTHER INTENSE THUNDERSTORM HAD DEVELOPED 30 MILES EAST OF HURON...NEAR DESMET. MOVEMENT WAS NORTHEAST AT 30 MILES AN HOUR. THESE THUNDERSTORM COULD ALSO PRODUCE HIGH WINDS AND HAIL. THERE WERE ALSO SCATTERED LIGHT RAINSHOWERS ACROSS NORTHEASTERN SOUTH DAKOTA...MOSTLY BETWEEN ABERDEEN AND WATERTOWN. THESE SHOWERS WERE MOVING NORTHEAST AT 25 MILES AN HOUR. ORGISH
Local storm report, Jun 29, 2:45 PM CDT, 3 hours 32 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
245 PM CDT SUN JUNE 29 1986
100 TO 200 PM CDT...VERY HEAVY RAINS/1.70/ AT KIMBALL SD IN BRULE CNTY
155 TO 215 PM CDT...VERY HEAVY RAINS/1.20/ AT PLANKINTON SD IN
AURORA CNTY
KAPELASpecial weather statement, Jun 29, 2:46 PM CDT, 3 hours 31 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 245 PM CDT SUN JUN 29 1986 AT 230 PM CDT...SCATTERED INTENSE THUNDERSTORMS CONTINUED IN SOUTH- ERN SOUTH DAKOTA. THESE THUNDERSTORMS WERE IN A A 10 MILE WIDE AREA EXTENDING FROM 15 MILES NORTHWEST OF MITCHELL...NEAR LETCHER...TO 25 MILES SOUTHWEST OF MITCHELL...NEAR STICKNEY. THUNDERSTORMS WITH VERY HEAVY RAIN WERE IN A 30 MILE WIDE AREA EXTENDING FROM 40 MILES EAST OF HURON...NEAR ARLINGTON...TO 20 MILES SOUTH OF HURON...30 MILES SSUTH OF WINNER IN NORTHERN NEBRASKA. THERE WERE ALSO SCATTERED SHOWERS AND THUNDERSHOWERS ACROSS SOUTHEASTERN NORTH DAKOTA...AND WESTERN MINNESOTA. SOME OF THE STRONGEST THUNDERSTORMS MAY PRODUCE STRONG GUSTY WINDS AND HAIL. THE SHOWERS AND THUNDERSTORMS WERE MOVING EAST AT 30 MILES AN HOUR. ORGISH
Special weather statement, Jun 29, 3:48 PM CDT, 2 hours 29 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 345 PM CDT SUN JUN 29 1986 ...TORNADO WATCH FOR PORTIONS OF SOUTH CENTRAL AND SOUTHEAST SOUTH DAKOTA UNTIL 10 PM CDT THIS SUNDAY EVENING... AT 330 PM CDT...SCATTERED INTENSE THUNDERSTORMS CONTINUED TO DEVELOP IN SOUTH CENTRAL AND SOUTHEASTERN SOUTH DAKOTA. THE STRONGEST THUNDER- STORMS WERE LOCATED IN A AREA 10 TO 20 MILES SOUTH OF MITCHELL... AND 40 MILES SOUTHEAST OF WINNER...NEAR BONESTEEL. STRONG GUSTY WINDS AND HAIL MAY BE EXPECTED WITH THESE STORMS. OTHERWISE SCATTERED THUNDERSTORMS CONTINUED TO INCREASE ACROSS SOUTH CENTRAL AND SOUTHEASTERN SOUTH DAKOTA. FROM NEAR BROOKINGS TO 50 MILES SOUTH OF WINNER IN NORTHERN NEBRASKA. SCATTERED SHOWERS REMAINED IN EAST CENTRAL AND NORTHEASTERN SOUTH DAKOTA. THE SHOWERS AND THUNDERSTORMS WERE MOVING EAST AT 25 MILES AN HOUR. ORGISH
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 28, 8:32 PM CDT | Severe Thunderstorm Warning | FSD | Bon Homme, Yankton | 58 min |
| Jun 28, 9:49 PM CDT | Severe Thunderstorm Warning | FSD | Clay, Yankton | 56 min |
| Jun 28, 9:49 PM CDT | Severe Thunderstorm Warning | FSD | Bon Homme | 56 min |
| Jun 29, 3:11 PM CDT | Severe Thunderstorm Warning | FSD | Gregory | 34 min |
| Jun 29, 3:17 PM CDT | Severe Thunderstorm Warning | FSD | Hutchinson | 58 min |
| Jun 29, 4:06 PM CDT | Tornado Warning | FSD | Hutchinson, Turner, Yankton | 39 min |
| Jun 29, 4:49 PM CDT | Tornado Warning | FSD | Clay, Turner, Yankton | 56 min |
| Jun 29, 5:37 PM CDT | Tornado Warning | FSD | Lincoln, Turner | 38 min |
| Jun 29, 6:02 PM CDT | Severe Thunderstorm Warning | FSD | Bon Homme, Yankton | 58 min |
| Jun 29, 6:02 PM CDT | Severe Thunderstorm Warning | FSD | Clay | 58 min |
| Jun 29, 6:09 PM CDT | Severe Thunderstorm Warning | FSD | Union | 66 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 1986Severe 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.