Alert archive / Minnesota / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 82, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Jul 11, 1987, 5:14 AM CDT for Cottonwood County, Jackson County, Minnesota. It was in force for 61 min.
The area
The counties it named.
The facts
- Issued
- Jul 11, 1987, 5:14 AM CDT (10:14 UTC)
- Expired
- Jul 11, 1987, 6:15 AM CDT
- In force
- 61 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, 10.2 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 111014
SVRFSD
MNC033-063-111115-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
514 AM CDT SAT JUL 11 1987
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 615 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES...
IN SOUTHWEST MINNESOTA
...COTTONWOOD...JACKSON
SOME OF THE CITIES INCLUDED ARE JEFFERS...MOUNTAIN LAKE...HERON LAKE
AND JACKSON.
AT 510 AM CDT RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS FROM 40
MILES EAST OF SIOUX FALLS NEAR ARDIAN MINNESOTA TO 60 MILES NORTHEAST
OF SIOUX FALLS NEAR CURRIE MINNESOTA. THE SEVERE THUNDERSTORMS WERE
MOVING NORTHEAST AT 35 MPH.
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.
BEHRENDWhat 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
Local storm report, Jul 11, 12:03 AM CDT, 5 hours 11 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE HURON SD
1155 PM CDT FRI JUL 10 1987
445 PM CDT...21 MILES WEST OF PIERRE SD...LARGE AMOUNT OF MARBLE
SIZE HAIL.
453 PM CDT...25 MILES WEST OF PIERRE SD...GOLFBALL SIZE HAIL...
30 MPH WIND.
453 PM CDT...25 MILES WSW OF PIERRE SD...TORNADO REPORTED BY A
SPOTTER. ALSO GOLF BALL SIZE HAIL.
520 PM CDT...45 MILES SOUTHWEST OF PIERRE SD...FUNNEL CLOUD ORTED
BY AN OFF DUTY NWS OBSERVER.
530 PM CDT...25 MILES NORTHWEST OF PIERRE SD...PEA SIZE HAIL.
544 PM CDT...20 MILES NORTHEAST OF PIERRE SD...FUNNEL CLOUD REPORTED
BY THE PUBLIC NEAR ONIDA.
551 PM CDT...30 MILES WEST OF PIERRE SD...BASEBALL SIZE HAIL COVERING
THE GROUND.
554 PM CDT...40 MILES SOUTHWEST OF PIERRE SD...QUARTER SIZE HAIL.
604 PM CDT...20 MILES NORTHEAST OF PIERRE SD...FUNNEL CLOUD.
605 PM CDT...30 MILES WEST OF PIERRE SD...11/2 TO 13/4 INCH HAIL.
935 PM CDT...70 NORTHEAST OF PIERRE SD...PEA SIZE HAIL...HEAVY RAIN
AND WIND LESS THAN 25 MPH.
SPRINGERSpecial weather statement, Jul 11, 12:50 AM CDT, 4 hours 24 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 1240 AM CDT SAT JUL 11 1987 ...SEVERE THUNDERSTORM WATCH FOR PORTIONS OF SOUTH CENTRAL AND SOUTH EASTERN SOUTH DAKOTA UNTIL 500 AM CDT SATURDAY MORNING... AT 1230 AM CDT...NUMEROUS INTENSE THUNDERSTORMS CONTINUED OVER SOUTH CENTRAL SOUTH DAKOTA...MAINLY IN THE AREA ALONG AND WEST OF THE MISSOURI RIVER AND SOUTH OF A LINE FROM CHAMBERLAIN TO WINNER. VERY HEAV4Y RAIN...HAIL...AND STRONG WIND ARE LIKELY WITH THESE STORMS. MOVEMENT WAS EAST AT 20 MILES AN HOUR. SPRINGER
Special weather statement, Jul 11, 1:48 AM CDT, 3 hours 26 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 140 AM CDT SAT JUL 11 1987 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 5 AM CDT FOR SOUTH CENTRAL AND SOUTHEAST SOUTH DAKOTA... AT 130 AM CDT...NUMEROUS INTENSE THUNDERSTORMS CONTINUED OVER SOUTH CENTRAL SOUTH DAKOTA...MAINLY IN THE AREA ALONG AND 25 MILES EITHER SIDE OF THE MISSOURI RIVER FROM PIERRE TO THE NEBRASKA LINE. THE STRONGEST STORM IS NEAR PICKSTOWN...WHICH IS 50 MILES WEST OF YANKTON. HAIL...STORNG WIND AND VERY HEAVY RAIN IS LIKELY WITH THIS STORM. SPRINGER
Special weather statement, Jul 11, 1:54 AM CDT, 3 hours 20 minutes 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, 32 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, 9 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
The 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, 6:54 AM CDT | Severe Thunderstorm Warning | FSD | Cottonwood, Jackson | 36 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.