Alert archive / South Dakota / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 21, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 28, 1987, 4:06 PM CDT for Aurora County, Davison County, South Dakota. It was in force for 54 min.
The area
The counties it named.
The facts
- Issued
- Jun 28, 1987, 4:06 PM CDT (21:06 UTC)
- Expired
- Jun 28, 1987, 5:00 PM CDT
- In force
- 54 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
Counties Aurora County, SD, Davison 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, 9.1 hours before the alert went out and 134 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
- 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
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KFSD 282106
SVRFSD
SDC003-035-282200-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
406 PM CDT SUN JUN 28 1987
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 500 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES...
IN SOUTH CENTRAL SOUTH DAKOTA
...EASTERN AURORA
IN SOUTHEAST SOUTH DAKOTA
...DAVISON
CITIES INCLUDED IN THIS WARNING...STICNEY AND MITCHELL.
AT 405 PM CDT RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS FROM 25
MILES NORTHWEST OF MITCHELL TO 10 MILES WEST OF STICKNEY. THE LINE
WAS MOVING EAST-SOUTHEAST AT 35 MPH.
IF YOU ARE IN THE PATH OF THIS STORM...YOU SH-OULD GET TO A
REINFORCED SHELTER. A SEVERE THUNDERSTORM PRODUCES 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.
JANSENWhat 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, 1:51 PM CDT, 2 hours 15 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 145 PM CDT SUN JUN 28 1987 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR PORTIONS OF CENTRAL AND EASTERN SOUTH DAKOTA... AT 140 PM CDT...WIDELY SCATTERED THUNDERSTORMS WITH RAIN WERE OCCURRING OVER OARTS OF EATERN SOUTH DAKOTA. THE STRONGEST THUNDERSTORM WAS LOCATED OVER NORTHEAST BEADLE COUNTY. OTHERWISE MOST OF THE THUNDERSTORMS WERE LOCATED NORTH OF A PIERRE/+HURON/WATERTOWN LINE. MOVEMENT WAS SOUTHEAST AND AT 35 MILES AN HOUR. MILLER
Special weather statement, Jun 28, 1:54 PM CDT, 2 hours 12 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 145 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 140 PM CDT...WIDELY SCATTERED THUNDERSTORMS WITH RAIN WERE OCCURRING OVER PARTS OF EASTERN SOUTH DAKOTA. THE STRONGEST THUNDERSTORM WAS LOCATED OVER NORTHEAST BEADLE COUNTY. OTHERWISE MOST OF THE THUNDERSTORMS WERE LOCATED NOR.TH OF A PIERRE/HURON/WATERTOWN LINE. MOVEMENT WAS SOUTHEAST AND AT 35 MILES AN HOUR. MILLER
Special weather statement, Jun 28, 2:42 PM CDT, 1 hour 24 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, 1 hour 4 minutes 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, 5 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
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 28, 4:51 PM CDT | Tornado Warning | FSD | Hanson, Hutchinson | 24 min |
| Jun 28, 5:03 PM CDT | Severe Thunderstorm Warning | FSD | Hutchinson, McCook | 57 min |
Nearby
Severe Thunderstorm Warnings in South Dakota, 1987Every 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.