Alert archive / South Dakota / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 59, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Jul 10, 1987, 2:06 AM CDT for Bon Homme County, Charles Mix County, South Dakota. It was in force for 54 min.
The area
The counties it named.
The facts
- Issued
- Jul 10, 1987, 2:06 AM CDT (07:06 UTC)
- Expired
- Jul 10, 1987, 3:00 AM CDT
- In force
- 54 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
Counties Bon Homme County, SD, Charles Mix 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, 7.1 hours before the alert went out and 201 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
- 3310 J/kg
- Mixed-layer CIN
- -35 J/kg
- Mixed-layer LCL
- 1122 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 168 m²/s²
- 0-3 km storm-relative helicity
- 328 m²/s²
- Significant tornado parameter
- 4.0
- Supercell composite
- 21.6
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KFSD 100706
SVRFSD
SDC009-023-100800-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
206 AM CDT FRI JUL 10 1987
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 300 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES...
IN SOUTHEAST SOUTH DAKOTA
...SOUTHERN BON-HOMME
IN SOUTH CENTRAL SOUTH DAKOTA
...SOUTHEASTERN CHARLES-MIX
SOME CITIES INCLUDED IN THIS WARNING...AVON...TYNDALL.
AT 200 AM CDT RADAR INDICATED A SEVERE THUNDERSTORM 15 MILES SOUTH OF
PICKSTOWN SOUTH DAKOTA MOVING EAST-NORTHEAST AT 30 MPH. LARGE HAIL
AND VERY HEAVY RAINS CAN BE EXPECTED WITH THIS STORM.
THIS WARNING INCLUDES THE ADJACENT WATERS OF THE MISSOURI RIVER.
IF YOU ARE IN THE PATH OF THIS STORM...YOU SHOULD 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, Jul 9, 11:56 PM CDT, 2 hours 10 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 1150 AM CDT THU JUL 9 1987 ...SCATTERED THUNDERSTORMS REMAIN OVER SOUTHEAST SOUTH DAKOTA... NORTHWEST IOWA AND SOUTHWEST MINNESOTA... AT 1145 PM CDT SCATTERED SHOWERS AND THUNDERSTORMS WERE CONTINUING OVER SOUTHEAST SOUTH DAKOTA...NORTHWEST IOWA AND SOUTHWEST MINNESOTA. THE MOST INTENSE THUNDERSTORMS WERE LOCATED 25 MILES NORTHEAST OF SIOUX FALLS...JUST WEST OF HARDWICK MINNESOTA AND 30 MILES SOUTHEAST OF SIOUX FALLS NEAR HULL IOWA. THESE INTENSE THUNDERSTORMS WERE PART OF A LARGE AREA OF SHOWERS AND THUNDERSTORMS THAT WERE IN A 100 MILE AREA FROM CLARKFIELD MINNESOTA TO RANDOLPH NEBRASKA. ALL THE SHOWERS AND THUNDERSTORMS WERE MOVING EAST AT 30 MPH. SOME OF THE THUNDERSTORMS MAY PRODUCE VERY HEAVY RAIN...SMALL HAIL AND WINDS OF 40 TO 50 MPH. PEOPLE THROUGHOUT SOUTHEAST SOUTH DAKOTA... NORTHWEST IOWA AND SOUTHWEST MINNESOTA ARE ADVISED TO BE ALERT TONIGHT. B,EHREND
Local storm report, Jul 10, 12:03 AM CDT, 2 hours 3 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1200 AM CDT FRI JUL 10 1987
925 PM CDT TORNADO 11/2 MILES NORTH OF MENNO IN HUTCHINSON COUNTY
REPORTED BY PARKER STATE RADIO
1015 6PM CDT CONSIDERABLE MARBLE SIZE HAIL POSSIBLY CAUSING CROP
DAMAGE NEAR IRENE IN NORTHEAST YANKTON COUNTY REPORTED
BY PARKER STATE RADIO
RYRHOLMSpecial weather statement, Jul 10, 12:46 AM CDT, 1 hour 20 minutes before
^DSMSPSSUX SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 1245 AM CDT THU JUL 9 1987 ...FLASH FLOOD WATCH REST OF TONIGHT... ...SEVERE THUNDERSTORM WATCH UNTIL 5 AM FRIDAY MORNING... AT 1240 AM CDT SCATTERED SHOWERS AND THUNDERSTORMS EXTENDED FROM SIOUX FALLS SOUTH DAKOTA TO 35 MILES EAST OF SIOUX CITY IOWA TO 60 MILES SOUTHWEST OF SIOUX CITY. THESE THUNDERSTORMS CONTINUED TO MOVE TO THE EAST AT 35 MILES AN HOUR. THESE THUNDERSTORMS HAVE BEEN PRODUCING SMALL HAIL...STRONG GUSTY WINDS ...DANGEROUS LIGHTNING AND VERY HEAVY RAIN AS THEY HAVE PASSED THROUGH THE AREA. PEOPLE IN IDA...EASTERN CHEROKEE AND EASTERN OBRIEN COUNTIES IN IOWA SHOULD REMAIN ALERT AND BE PREPARED TO TAKE COVER IF SEVERE WEATHER IS OBSERVED. ROSNER
Special weather statement, Jul 10, 12:57 AM CDT, 1 hour 9 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE HURON SD
1240 AM CDT FRI JUL 10 1987
AT 1230 AM CDT...NUMEROUS HEAVY THUNDERSTORMS CONTINUED OVER MUCH OF
SOUTHEAST SOUTH DAKOTA...SOUTHWEST MINNESOTA...NORTHWEST IOWA WHILE
SCATTERED INTENSE THUNDERSTORMS HAVE DEVELOPED OVER PARTS OF NORTHEAST
NEBRASKA.
THESE STORMS WERE MOSTLY SOUTHEAST OF A LINE FROM WATERTOWN TO BONESTEEL
WITH THE STRONGEST STORMS LOCATED OVER NORTHEAST NEBRASKA...45 MILES
SOUTHWEST OF PICKSTOWN. THIS STORM APPEARS SEVERE WITH POSSIBLE LARGE
HAIL...STRONG GUSTY WINDS AND VERY HEAVY RAIN. PERSONS ALONG THE
MISSOURI RIVER DOWN STREAM FROM PICKSTOWN INTO THE YANKTON AREA SHOULD
BE ON {THE ALERT FOR SEVERE WEATHER AS THIS STORM MOVES EAST. THIS SEVERE
STORM SHOULD...IF IT HOLDS ITS INTENSITY...BE IN THE LEWIS AND CLARK LAKE
AREA BETWEEN 200 AM AND 230 AM CDT.
MOVEMENT WAS EAST AT 35 MILES AN HOUR.
PFEIFFERSpecial weather statement, Jul 10, 1:23 AM CDT, 43 minutes before
^DSMSPSSUX SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 120 AM CDT FRI JUL 10 1987 ...FLASH FLOOD WATCH REST OF TONIGHT... ...SEVERE THUNDERSTORM WATCH UNTIL 5 AM FRIDAY MORNING... AT 115 AM CDT NUMEROUS SHOWERS AND THUNDERSTORMS WERE SEEN ALL ACROSS THE SIOUXLAND AREA. THE LEADING EDGE OF THE THUNDERSTORMS EXTENDED FROM THE SOUTHWEST CORNER OF MINNESOTA TO ABOUT 60 MILES EAST OF SIOUX CITY...THEN SOUTHWEST TO THE VICINITY OF THE OMAHA..COUNCIL BLUFFS METRO AREA. BEHIND THIS LEADING EDGE THE THUNDERSTORMS EXTENDED WESTWARD INTO NORTH CENTRAL NEBRASKA. THE STORMS ARE MOVING EAST AT ABOUT 30 MILES AN HOUR. RESIDENTS OF ALL COUNTIES IN THE SIOUXLAND AREA SHOULD BE ON THE ALERT FOR POSSIBLE SEVERE WEATHER FOR THE REMAINDER OF THE NIGHT. THESE STORMS HAVE PRODUCED HEAVY RAIN SHOWERS...DANGEROUS LIGHTNING AND SMALL HAIL. SHERLIN
Special weather statement, Jul 10, 1:47 AM CDT, 19 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 135 AM CDT FRI JUL 10 1987 AT 130 AM CDT...NUMEROUS INTENSE THUNDERSTORMS CONTINUED OVER PARTS OF NORTHEAST NEBRASKA WHILE NUMEROUS THUNDERSTORMS CONTINUED OVER MUCH OF SOUTHWEST MINNESOTA...NORTHWEST IOWA AND A SMALL PART OF SOUTHEAST AND CENTRAL SOUTH DAKOTA. THE INTENSE STORMS WERE JUST SOUTH OF THE SOUTH DAKOTA-NEBRASKA BORDER WITH THE HEAVIEST STORMS LOCATED 25 MILES SOUTH OF BONESTEEL. THESE STORMS APPEAR SEVERE WITH POSSIBLE LARGE HAIL...STRONG GUSTY WINDS AND VERY HEAVY RAIN. PERSONS IN THE LEWIS AND CLARK LAKE AREA SHOULD BE ON THE ALERT FOR SEVERE WEATHER AS THIS STORM MOVES EAST. THIS SEVERE STORM SHOULD...IF IT HOLDS ITS INTENSITY...BE IN THE LEWIS AND CLARK LAKE AREA BETWEEN 230 AM AND 300 AM CDT. MOVEMENT WAS EAST AT 35 MILES AN HOUR. PFEIFFER
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 9, 7:36 PM CDT | Severe Thunderstorm Warning | FSD | Aurora, Brule, Charles Mix | 54 min |
| Jul 9, 7:36 PM CDT | Severe Thunderstorm Warning | FSD | Gregory | 54 min |
| Jul 9, 8:07 PM CDT | Severe Thunderstorm Warning | FSD | Aurora, Davison, Douglas | 53 min |
| Jul 9, 9:39 PM CDT | Tornado Warning | FSD | Hutchinson, Turner | 36 min |
| Jul 9, 9:47 PM CDT | Severe Thunderstorm Warning | FSD | Turner | 43 min |
| Jul 9, 10:16 PM CDT | Severe Thunderstorm Warning | FSD | Brookings | 59 min |
| Jul 9, 10:23 PM CDT | Severe Thunderstorm Warning | FSD | Turner | 27 min |
| Jul 9, 10:23 PM CDT | Severe Thunderstorm Warning | FSD | Clay, Lincoln | 52 min |
| Jul 10, 12:00 AM CDT | Severe Thunderstorm Warning | FSD | Todd, Tripp | 60 min |
| Jul 10, 6:51 AM CDT | Severe Thunderstorm Warning | FSD | Bon Homme, Charles Mix | 54 min |
| Jul 10, 3:56 PM CDT | Severe Thunderstorm Warning | FSD | Mellette | 64 min |
| Jul 10, 4:05 PM CDT | Tornado Warning | FSD | Mellette | 25 min |
| Jul 10, 4:28 PM CDT | Tornado Warning | FSD | Mellette | 32 min |
| Jul 10, 4:38 PM CDT | Severe Thunderstorm Warning | FSD | Todd | 67 min |
| Jul 10, 4:59 PM CDT | Severe Thunderstorm Warning | FSD | Mellette | 61 min |
| Jul 10, 5:42 PM CDT | Severe Thunderstorm Warning | FSD | Todd, Tripp | 63 min |
| Jul 10, 6:42 PM CDT | Severe Thunderstorm Warning | FSD | Todd, Tripp | 63 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.