Alert archive / South Dakota / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 157, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 6, 1986, 6:24 PM CDT for Tripp County, South Dakota. It was in force for 66 min.
The area
The counties it named.
The facts
- Issued
- Aug 6, 1986, 6:24 PM CDT (23:24 UTC)
- Expired
- Aug 6, 1986, 7:30 PM CDT
- In force
- 66 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
County Tripp 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, 11.4 hours before the alert went out and 209 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
- 649 J/kg
- Mixed-layer CIN
- -88 J/kg
- Mixed-layer LCL
- 970 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- -13 m²/s²
- 0-3 km storm-relative helicity
- 27 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KFSD 062324 SVRFSD SDC123-070030- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 624 PM CDT WED AUG 6 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 730 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF SOUTH CENTRAL SOUTH DAKOTA...NORTHERN TRIPP SOME OF THE CITIES INCLUDED IN THIS WARNING ARE IDEAL AND HAMILL. AT 620 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM 3 MILES NORTHWEST OF WINNER...MOVING EAST/NORTHEAST AT 30 MPH. 1/2 INCH HAIL WAS REPORTED 10 MILES WEST OF WINNER AT 613 PM CDT. 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. KAPELA
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, Aug 6, 1:48 PM CDT, 4 hours 36 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 130 PM CDT 6 AUG 1986 AT 130 PM CDT...SCATTERED INTENSE THUNDERSTORMS WITH VERY HEAVY RAINS... WINDS OF 40 TO 50 MILES PER HOUR...AND POSSIBLE HAIL WERE OCCURING OVER NORTH CENTRAL SOUTH DAKOTA ALONG THE NORTH DAKOTA SOUTH DAKOTA BORDER...AND TO THE EAST OF THE MISSOURI RIVER. THESE THUNDERSTORMS WERE MOVING EAST AT 30 MILES AN HOUR...AND SHOWING LITTLE CHANGEq IN INTENSITY. EDDY
Special weather statement, Aug 6, 3:52 PM CDT, 2 hours 32 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 345 PM CDT 6 AUG 1986 ...A TORNADO WATCH IS IN EFFECT UNTIL 900 PM CDT FOR PARTS OF CENTRAL AND MUCH OF EASTERN SOUTH DAKOTA... AT 330 PM CDT...SCATTERED INTENSE THUNDERSTORMS WITH VERY HEAVY RAIN CONTINUED OVER PARTS OF CENTRAL AND NORTHEAST SOUTH DAKOTA AND INTO SOUTHEAST NORTH DAKOTA. THESE STORMS WERE MOSTLY NORTHWEST OF A LINE FROM MISSION TO BRITTON WITH THE HEAVIEST STORMS LOCATED JUST SOUTH OF BELVIDERE...JUST WEST OF BARNARD AND 10 MILES NORTHWEST OF MIDLAND. MOVEMENT WAS SOUTHEAST AT 25 MILES AN HOUR. EDDY/PFEIFFER
Special weather statement, Aug 6, 4:33 PM CDT, 1 hour 51 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 430 PM CDT WED AUG 6 1986 ...TORNADO WATCH IN EFFECT FOR PARTS OF CENTRAL AND EASTERN SOUTH DAKOTA UNTIL 9 PM CDT... AT 425 PM CDT SCATTERED INTENSE THUNDERSTORMS WITH VERY HEAVY RAIN HAVE CONTINUED TO DEVELOP MAINLY IN CENTRAL SOUTH DAKOTA FROM SOUTH OF MOBRIDGE ON SOUTHWEST TO SOUTHEAST OF RAPID CITY. A STRONG THUNDER/ STORM WITH VERY HEAVY RAIN WAS APPROACHING WHITE RIVER LIN SOUTH/CENTRAL SOUTH DAKOTA. ALL THESE THUNDERSTORMS WERE MOVING EAST/SOUTHEAST AT ABOUT 25 MPH AND ARE CAPABLE OF DEVELOPING LARGE HAIL..DAMAGING WINDS.. HEAVY RAINS..AND FREQUENT LIGHTNING. RYRHOLM
Special weather statement, Aug 6, 4:41 PM CDT, 1 hour 43 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 440 PM CDT 6 AUG 1986 ...A TORNADO WATCH IS IN EFFECT UNTIL 900 PM CDT FOR PARTS OF CENTRAL AND MUCH OF EASTERN SOUTH DAKOTA... AT 430 PM CDT...SCATTERED INTENSE THUNDERSTORMS WITH VERY HEAVY RAIN CONTINUED OVER PARTS OF CENTRAL SOUTH DAKOTA. THESE STORMS WERE MOSTLY NORTHWEST OF A LINE 15 MILES WEST TO 50 MILES NORTHEAST OF PIERRE. THE STRONGEST STORMS WERE LOC^ATED 15 MILES NORTHWEST OF PIERRE AND 30 MILES SOUTHEAST OF MOBRIDGE. MOVEMENT WAS SOUTHEAST AT 30 MILES AN HOUR. EDDY/MORRIS
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 6, 4:57 PM CDT | Severe Thunderstorm Warning | FSD | Todd, Tripp | 2 hr |
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.