Alert archive / Minnesota / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 83, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Jul 11, 1987, 6:54 AM CDT for Cottonwood County, Jackson County, Minnesota. It was in force for 36 min.
The area
The counties it named.
The facts
- Issued
- Jul 11, 1987, 6:54 AM CDT (11:54 UTC)
- Expired
- Jul 11, 1987, 7:30 AM CDT
- In force
- 36 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
Counties Cottonwood County, MN, Jackson County, MN
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
Minneapolis, MN (KSTC), launched 00:00Z, 11.9 hours before the alert went out and 168 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
- 2006 J/kg
- Mixed-layer CIN
- -10 J/kg
- Mixed-layer LCL
- 1402 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- -4 m²/s²
- 0-3 km storm-relative helicity
- 56 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.1
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KFSD 111154
SVRFSD
MNC033-063-111245-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
654 AM CDT SAT JUL 11 1987
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 730 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES...
IN SOUTHWEST MINNESOTA
...EASTERN COTTONWOOD...EASTERN JACKSON
SOME CITIES INCLUDED IN THIS WARNING...MOUNTAIN LAKE...JACKSON.
AT 650 AM CDT RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS FROM 80
MILES EAST OF SIOUX FALLS NEAR JACKSON MINNESOTA TO 80 MILES
NORTHEAST OF SIOUX FALLS NEAR WINDOM MINNESOTA. THE LINE WAS MOVING
NORTHEAST AT 40 MPH.
IF YOU ARE IN THE PATH O.F 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 11, 1:54 AM CDT, 5 hours before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 150 AM CDT SAT JUL 11 1987 ...SCATTERED THUNDERSTORMS...SOME OF THEM INTENSE...WERE OVER SOUTH CENTRAL AND SOUTHEAST SOUTH DAKOTA... AT 145 AM CDT RADAR INDICATED SCATTERED SHOWERS AND THUNDERSTORMS IN A 80 MILES WIDE AREA FROM 85 MILES NORTHEAST OF SIOUX FALLS NEAR WILLOW LAKE SOUTH DAKOTA TO 140 MILES SOUTHWEST NEAR ATKINSON NEBRASKA. IN SOUTH CENTRAL AND SOUTHEAST SOUTH DAKOTA THE MOST INTENSITY THUNDERSTORMS WERE NEAR THE NEBRASKA BORDER FROM GREGORY TO TYNDALL. THESE WAS ALSO AN INTENSITY THUNDERSTORM IN NORTHEAST NEBRASKA 10 MILES SOUTHWEST OF BUTTE OR 85 MILES WEST OF YNAKTON SOUTH DAKOTA. ALL THE SHOWERS AND THUNDERSTORMS WERE MOVING EASTNORTHEAST AT 30 MPH. VERY HEAVY RAIN...HAIL AND STRONG WINDS ARE POSSIBLE WITH THE INTENSE THUNDERSTORMS. SEVERE THUDERSTORMS ARE ALSO POSSIBLE THIS MORNING AND PEOPLE THROUGHOUT SOUTH CENTRAL AND SOUTHEAST SOUTH DAKOTA ARE ADVISED TO BE ALERT...ESPECIALLY THOSE ALONG THE NEBRASKA BORDER. BEHREND
Special weather statement, Jul 11, 4:42 AM CDT, 2 hours 12 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 540 AM CDT SAT JUL 11 1987 ...A TORNADO WATCH IS IN EFFECT UNTIL 8 AM CDT FOR EASTERN SOUTH DAKOTA... AT 430 AM CDT...NUMEROUS INTENSE THUNDERSTORMS WERE OCCURRING OVER EAST CENTRAL SOUTH DAKOTA AND SOUTHEAST SOUTH DAKOTA AND WESTERN MINNESOTA. THE STORMS WERE IN THE AREA ALONG AND 45 MILES EITHER SIDE OF THE STATE LINE FROM EAST OF BROOKINGS TO EAST OF SIOUX FALLS. VERY HEAVY RAIN...STRONG WIND AND HAIL ARE LIKELY IN THIS AREA. THE STORMS WERE MOVING NORTHEAST AT 40 MILES AN HOUR. OTHERWISE...WIDESPREAD SHOWERS AND THUNDERSTORMS CONTINUED OVER MOST OF THE EASTERN HALF OF SOUTH DAKOTA. THESE SHOWERS AND THUNDERSTORMS WERE MOVING AT 30 MILES AN HOUR. SPRINGER
Special weather statement, Jul 11, 5:05 AM CDT, 1 hour 49 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 500 AM CDT SAT JUL 11 1987 ...TORNADO WATCH NUMBER 358 HAS BEEN CANCELLED FOR EASTERN SOUTH DAKOTA... TORNADO WATCH NUMBER 358 IS NO LONGER IN EFFECT FOR EASTERN SOUTH DAKOTA. SCATTERED SHOWERS AND THUNDERSTORMS HOWEVER ARE EXPECTED TO CONTINUE OVER EASTERN SOUTH DAKOTA THIS MORNING. VERY HEAVY RAIN AND GUSTY WINDS MAY YET OCCUR WITH SOME THUNDERSTORMS. BEHREND
Local storm report, Jul 11, 5:52 AM CDT, 1 hour 2 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
550 AM CDT SAT JUL 11 1987
FRIDAY JULY 10...
410 PM CDT TORNADO NEAR CEDAR BUTTE SOUTH DAKOTA IN MELLETTE COUNTY.
REPORTED BY MELLETTE COUNTY SHEFIFF.
420 PM CDT TORNADO EAST OF LONG VALLEY SOUTH DAKOTA IN MELLETTE
COUNTY AND SECONG TORNADO BY WHITE RIVER SOUTH DAKOTA IN
MELLETTE COUNTY.
426 PM CDT TENNIS BALL SIZE HAIL AT CEDAR BUTTE IN MELLETTE COUNTY.
604 PM CDT MARBLE SIZE HAIL AND 3/4 OF AN INCH OF RAIN IN 10 MINUTES
AT MISSION SOUTH DAKOTA IN TODD COUNTY.
SATURDAY JULY 11...
<
130 AM CDT 30 TO 40 MPH AND VERY HEAVY RAIN AT BURKE SOUTH DAKOTA
IN GREGORY COUNTY.
300 TO 315 WINDS ESTIMATED AT 80 TO 100 MPH AT PARKSTON SOUTH DAKOTA
AM CDT IN HUTCHINSON COUNTY. AIRPLANES FLIPPED OVER...HANGERS
BLOWN OFF FOUNDATION...TREES DOWN ALL OVER TOWN.
325 AM CDT 50 MPH OR GREATER WINDS AND HEAVY RAIN AT ALEXANDRIA SOUTH
DAKOTA IN HANSON COUNTY.
332 AM CDT 1 1/2 INCHES OF RAIN AT ETHAN SOUTH DAKOTA IN DAVISON
COUNTY.
335 AM CDT MARBLE SIZE FOR 5 MINUTES AT TURKEY RIDGE SOUTH DAKOTA IN
TURNER COUNTY.
338 AM CDT 60 TO 70 MPH WINDS AT HENDRICKS MINNESOTA IN LINCOLN
COUNTY. SOME TREES DOWN.
340 AM CDT 60 TO 80 MPH WINDS AT CANISOTA SOUTH DAKOTA IN MCCOOK
COUNTY.
355 AM CDT 50 MPH WINDS AT LENNOX SOUTH DAKOTA IN LINCOLN COUNTY.
<
410 AM CDT 60 MPH WINDS AT DELL RAPIS SOUTH DAKOTA IN MINNEHAHA
COUNTY. TOWN WITHOUT POWER.
450 AM CDT 50 MPH OR GREATER WINDS AND PEA SIZE HAIL AT TYLER
MINNESOTA IN LINCOLN COUNTY.
BEHRENDSpecial weather statement, Jul 11, 5:56 AM CDT, 58 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 555 AM CDT SAT JUL 11 1987 ...CANCEL SEVERE THUNDERSTORM WARNING FOR JACKSON AND COTTONWOOD COUNTIES OF SOUTHWESTERN MINNESOTA... THE SEVERE THUNDERSTORM WARNING PREVIOUSLY ISSUED FOR THE SOUTHWEST MINNESOTA COUNTIES OF JACKSON AND COTTONWOOD HAS BEEN CANCELLED. THE THUNDERSTORMS WHICH ENTERED THOSE COUNTIES HAVE FALLEN APART QUICKLY...AND THE THREAT OF SEVERE WEATHER IN THAT AREA NO LONGER EXISTS. AT 555 AM CDT AN INTENSE THUNDERSTORM WAS LOCATED 60 MILES NORTHEAST OF SIOUX FALLS NEAR FULDA...MOVING NORTHEAST AT 40 MPH. THIS INTENSE THUNDERSTORM WILL MOVE INTO COTTONWOOD COUNTY AND AFFECT THE CITIES OF JEFFERS AND STORDEN. KAPELA
Local storm report, Jul 11, 6:27 AM CDT, 27 minutes before
STORM REPORT...UPDATED TO INCLUDE SIOUX FALLS REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
625 AM CDT SAT JUL 11 1987
FRIDAY JULY 10...
410 PM CDT TORNADO NEAR CEDAR BUTTE SOUTH DAKOTA IN MELLETTE COUNTY.
REPORTED BY MELLETTE COUNTY SHEFIFF.
420 PM CDT TORNADO EAST OF LONG VALLEY SOUTH DAKOTA IN MELLETTE
COUNTY AND SECONG TORNADO BY WHITE RIVER SOUTH DAKOTA IN
MELLETTE COUNTY.
426 PM CDT TENNIS BALL SIZE HAIL AT CEDAR BUTTE IN MELLETTE COUNTY.
604 PM CDT MARBLE SIZE HAIL AND 3/4 OF AN INCH OF RAIN IN 10 MINUTES
AT MISSION SOUTH DAKOTA IN TODD COUNTY.
SATURDAY JULY 11...
<
130 AM CDT 30 TO 40 MPH AND VERY HEAVY RAIN AT BURKE SOUTH DAKOTA
IN GREGORY COUNTY.
300 TO 315 WINDS ESTIMATED AT 80 TO 100 MPH AT PARKSTON SOUTH DAKOTA
AM CDT IN HUTCHINSON COUNTY. AIRPLANES FLIPPED OVER...HANGERS
BLOWN OFF FOUNDATION...TREES DOWN ALL OVER TOWN.
325 AM CDT 50 MPH OR GREATER WINDS AND HEAVY RAIN AT ALEXANDRIA SOUTH
DAKOTA IN HANSON COUNTY.
332 AM CDT 1 1/2 INCHES OF RAIN AT ETHAN SOUTH DAKOTA IN DAVISON
COUNTY.
335 AM CDT MARBLE SIZE FOR 5 MINUTES AT TURKEY RIDGE SOUTH DAKOTA IN
TURNER COUNTY.
338 AM CDT 60 TO 70 MPH WINDS AT HENDRICKS MINNESOTA IN LINCOLN
COUNTY. SOME TREES DOWN.
340 AM CDT 60 TO 80 MPH WINDS AT CANISOTA SOUTH DAKOTA IN MCCOOK
COUNTY.
355 AM CDT 50 MPH WINDS AT LENNOX SOUTH DAKOTA IN LINCOLN COUNTY.
<
403 AM CDT 54 MPH WINDS AT SIOUX FALLS AIRPORT.
410 AM CDT 60 MPH WINDS AT DELL RAPIS SOUTH DAKOTA IN MINNEHAHA
COUNTY. TOWN WITHOUT POWER.
450 AM CDT 50 MPH OR GREATER WINDS AND PEA SIZE HAIL AT TYLER
MINNESOTA IN LINCOLN COUNTY.
KAPELAThe office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 11, 4:06 AM CDT | Severe Thunderstorm Warning | FSD | Rock | 54 min |
| Jul 11, 4:06 AM CDT | Severe Thunderstorm Warning | FSD | Lincoln, Lyon | 54 min |
| Jul 11, 4:21 AM CDT | Severe Thunderstorm Warning | FSD | Pipestone | 54 min |
| Jul 11, 4:42 AM CDT | Severe Thunderstorm Warning | FSD | Murray, Nobles | 63 min |
| Jul 11, 4:54 AM CDT | Severe Thunderstorm Warning | FSD | Lyon | 66 min |
| Jul 11, 5:14 AM CDT | Severe Thunderstorm Warning | FSD | Cottonwood, Jackson | 61 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 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.