Alert archive / Iowa / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 75, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 28, 1986, 5:03 AM CDT for Lyon County, Osceola County, Iowa. It was in force for 42 min.
The area
The counties it named.
The facts
- Issued
- Jun 28, 1986, 5:03 AM CDT (10:03 UTC)
- Expired
- Jun 28, 1986, 5:45 AM CDT
- In force
- 42 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
Counties Lyon County, IA, Osceola County, IA
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
Omaha, NE (KOAX), launched 00:00Z, 10.1 hours before the alert went out and 232 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 3580 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 5 m²/s²
- 0-3 km storm-relative helicity
- 32 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KFSD 281003 SVRFSD IAC119-143-281045- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 503 AM CDT SAT JUN 28 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 545 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF NORTHWEST IOWA...EASTERN LYON AND OSCEOLA SOME OF THE CITIES INCLUDED IN THIS WARNING ARE SIBLEY..OCHEYDAN.. AND GEORGE IOWA. AT 455 AM CDT RADAR INDICATED A SEVERE THUNDERSTORM IN SOUTHEAST ROCK COUNTY MINNESOTA MOVING SOUTHEAST AT 40 MPH. AT 450 AM CDT MARBLE SIZED HAIL AND HEAVY RAIN WERE REPORTED AT LUVERNE MINNESOTA WHICH IS 23 MILES EASTNORTHEAST OF SIOUX FALLS SOUTH DAKOTA. 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 AREAj. THESE STORMS CAN AND OCCASIONALLY DO PRODUCE A TORNADO WITH LITTLE OR NO ADVANCE WARNING SO BE ON THE LOOKOUT. THEOPHILUS
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, Jun 28, 12:43 AM CDT, 4 hours 20 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 1235 AM CDT SAT JUN 28 1986 ...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR NORTH CENTRAL SOUTH DAKOTA UNTIL 400 AM CDT... AT 1230 AM CDT...SCATTERED INTENSE THUNDERSTORMS WITH VERY HEAVY RAIN CONTINUED OVER PARTS OF NORTHEAST SOUTH DAKOTA. THESE STORMS WERE MOSTLY NORTHEAST OF A LINE FROM BROOKINGS TO ROSCOE WITH THE HEAVIEST STORMS LOCATED 10 MILES SOUTHWEST OF ABERDEEN AND 5 MILES SOUTH OF CLEAR LAKE. MOVEMENT WAS SOUTHEAST AT 35 MILES AN HOUR. ELSEWHERE...WIDELY SCATTERED SHOWERS AND THUNDERSTORMS CONTINUED OVER PARTS OF SOUTHEAST AND SOUTH CENTRAL SOUTH DAKOTA. MOVEMENT WAS SOUTHrEAST AT 30 MILES AN HOUR. PFEIFFER
Special weather statement, Jun 28, 1:49 AM CDT, 3 hours 14 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 145 AM CDT SAT JUN 28 1986 ...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR NORTH CENTRAL SOUTH DAKOTA UNTIL 400 AM CDT... AT 135 AM CDT...SCATTERED INTENSE THUNDERSTORMS WITH VERY HEAVY RAIN CONTINUED OVER PARTS OF NORTHEASTERN SOUTH DAKOTA. SCATTERED INTENSE THUNDERSTORMS WITH VERY HEAVY RAIN HAD DEVELOPED IN EXTREME SOUTHWESTERN MINNESOTA. IN SOUTH DAKOTA..THE STRONGEST THUNDERSTORM WAS 35 MILES NORTHWEST OF WATERTOWN..NEAR BRADLEY. IN MINNESOTA..THE STRONGEST THUNDERSTORMS WERE BETWEEN PIPESTONE AND WORTHINGTON. OTHERWISE..SCATTERED THUNDERSTORMS WERE OCCURING NORTH AND EAST OF A LINE FROM ABERDEEN TO SIOUX FALLS. ELSEWHERE..NUMEROUS THUNDERSTORMS..SOME WITH HEAVY RAIN.. WERE OCCURING IN CENTRAL SOUTH DAKOTA. THESE THUNDERSTORMS WERE IN A 75 MILE WIDE AREA FROM 40 MILES WEST OF PIERRE TO 30 MILES SOUTHEAST OF WINNER. ALL MOVEMENT WAS EAST AT 40 MILES AN HOUR. KRAUSE/PFEIFFER
Special weather statement, Jun 28, 2:51 AM CDT, 2 hours 12 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 250 AM CDT SAT JUN 28 1986 ...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR NORTH CENTRAL SOUTH DAKOTA UNTIL 400 AM CDT... AT 235 AM CDT...AN INTENSE THUNDERSTORM WITH VERY HEAVY RAIN CONTINUED IN EAST CENTRAL SOUTH DAKOTA. THIS STORM WAS 20 MILES SOUTH OF WATERTOWN. IT IS CAPABLE OF PRODUCING HAIL..STRONG GUSTY WINDS..AND VERY HEAVY RAINS. OTHERWISE..AN INTENSE THUNDERSTORM WITH VERY HEAVY RAIN WAS ALSO IN EXTREME SOUTHEASTERN NORTH DAKOTA. THIS STORM WAS 20 MILES NORTHWEST OF FORBES..OR 50 MILES NORTHWEST OF ABERDEEN. IT WILL MOVE INTO NORTHERN BROWN COUNTY BY 330 AM CDT. ALSO..THUNDERSTORMS WITH VERY HEAVY RAIN WERE IN SOUTH CENTRAL SOUTH DAKOTA. THE STRONGEST STORMS WERE ALONG INTERSTATE 90.. FROM CHAMBERLAIN TO MURDO. ALSO..SCATTERED THUNDERSTORMS WITH HEAVY RAIN ALSO EXTENDED INTO SOUTHWESTERN MINNESOTA AND EXTREME NORTHWESTERN IOWA. ALL MOVEMENT WAS SOUTHEAST AT 40 MILES AN HOUR. KRAUSE/PFEIFFER
Special weather statement, Jun 28, 3:53 AM CDT, 1 hour 10 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 350 AM CDT SAT JUN 28 1986 AT 335 AM CDT...AN INTENSE THUNDERSTORM WITH VERY HEAVY RAIN WAS IN EAST CENTRAL SOUTH DAKOTA. THIS STORM WAS IN SOUTHERN BROOKINGS AND NORTHERN MOODY COUNTIES. IT WAS FROM 15 MILES WEST OF BROOKINGS TO 10 MILES SOUTHEAST OF BROOKINGS. THIS STORM IS CAPABLE OF PRODUCING HAIL..DAMAGING WINDS.. AND VERY HEAVY RAINS. THESE THUNDERSTORMS ALSO EXTENDED INTO SOUTHWESTERN MINNESOTA..WHERE THE STRONGEST STORMS WERE JUST NORTH AND EAST OF PIPESTONE. OTHERWISE..AN INTENSE THUNDERSTORM WITH VERY HEAVY RAIN WAS IN SOUTH CENTRAL SOUTH DAKOTA. THIS STORM WAS FROM JUST NORTH OF WINNER TO JUST SOUTH OF CHAMBERLAIN. IT IS ALSO CAPABLE OF PRODUCING HAIL..STRONG WINDS..AND VERY HEAVY RAINS. ELSEWHERE..THUNDERSTORMS WITH VERY HEAVY RAIN WERE IN NORTHEASTERN SOUTH DAKOTA..AND EXTENDED INTO SOUTHEASTERN NORTH DAKOTA. THESE THUNDERSTORMS WERE NORTHEAST OF A LINE FROM WATERTOWN TO ABERDEEN. ALL MOVEMENT WAS SOUTHEAST AT 40 MILES AN HOUR. KRAUSE/PFEIFFER
Special weather statement, Jun 28, 4:55 AM CDT, 8 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 450 AM CDT SAT JUN 28 1986 AT 430 AM CDT...AN INTENSE THUNDERSTORM WITH VERY HEAVY RAIN WAS LOCATED 50 MILES SOUTHEAST OF WINNER..JUST EAST OF BONESTEEL..IN SOUTHEAST SOUTH DAKOTA. THIS THUNDERSTORM WAS EXPECTED TO PASS SOUTH OF LAKE ANDES AND MOVE INTO NEBRASKA. THE THUNDERSTORM MAY PORODUCE STRONG WINDS..HAIL AND DANGEROUS LIGHTNING IN ADDITION TO ITS HEAVY RAIN. ALSO..AN AREA OF SCATTERED SHOWERS AND THUNDERSTORMS WAS MOVING ACROSS NORTHEAST SOUTH DAKOTA..IN A 70 MILE WIDE BAND FROM ABERDEEN TO 70 MILES EAST OF ABERDEEN AND NORTH INTO NORTH DAKOTA. AN AREA OF RAINSHOWERS AND THUNDERSHOWERS HAD DEVELOPED IN A 40 MILE WIDE BAND FROM 30 MILES SOUTHWEST OF PIERRE TO 75 MILES NORTHEAST OF PIERRE IN CENTRAL SOUTH DAKOTA. ANOTHER SCATTERED AREA OF INTENSE THUNDERSTORMS WAS LOCATED IN SOUTHWEST MINNESOTA..IN A 40 MILE WIDE BAND FROM 30 MILES NORTHEAST OF \SIOUX FALLS TO 75 MILES EAST OF SIOUX FALLS. MOVEMENT OF ALL OF THE THUNDERSTORMS WAS SOUTHEAST AT 35 MILES AN HOUR. STOREY
Special weather statement, Jun 28, 4:56 AM CDT, 7 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 450 AM CDT SAT JUN 28 1986 AT 430 AM CDT...AN INTENSE THUNDERSTORM WITH VERY HEAVY RAIN WAS LOCATED 50 MILES SOUTHEAST OF WINNER..JUST EAST OF BONESTEEL..IN SOUTHEAST SOUTH DAKOTA. THIS THUNDERSTORM WAS EXPECTED TO PASS SOUTH OF LAKE ANDES AND MOVE INTO NEBRASKA. THE THUNDERSTORM MAY PORODUCE STRONG WINDS..HAIL AND DANGEROUS LIGHTNING IN ADDITION TO ITS HEAVY RAIN. ALSO..AN AREA OF SCATTERED SHOWERS AND THUNDERSTORMS WAS MOVING ACROSS NORTHEAST SOUTH DAKOTA..IN A 70 MILE WIDE BAND FROM ABERDEEN TO 70 MILES EAST OF ABERDEEN AND NORTH INTO NORTH DAKOTA. AN AREA OF RAINSHOWERS AND THUNDERSHOWERS HAD DEVELOPED IN A 40 MILE WIDE BAND FROM 30 MILES SOUTHWEST OF PIERRE TO 75 MILES NORTHEAST OF PIERRE IN CENTRAL SOUTH DAKOTA. ANOTHER SCATTERED AREA OF INTENSE THUNDERSTORMS WAS LOCATED IN SOUTHWEST MINNESOTA..IN A 40 MILE WIDE BAND FROM 30 MI]LES NORTHEAST OF SIOUX FALLS TO 75 MILES EAST OF SIOUX FALLS. MOVEMENT OF ALL OF THE THUNDERSTORMS WAS SOUTHEAST AT 35 MILES AN HOUR. STOREY
Nearby
Severe Thunderstorm Warnings in Iowa, 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.