Alert archive / Minnesota / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 104, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Jul 15, 1986, 8:59 AM CDT for Lyon County, Minnesota. It was in force for 61 min.
The area
The counties it named.
The facts
- Issued
- Jul 15, 1986, 8:59 AM CDT (13:59 UTC)
- Expired
- Jul 15, 1986, 10:00 AM CDT
- In force
- 61 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
County Lyon 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 12:00Z, 2.0 hours before the alert went out and 184 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
- NaN m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 58 m²/s²
- 0-3 km storm-relative helicity
- 112 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KFSD 151359 SVRFSD MNC083-151500- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 859 AM CDT TUE JUL 15 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1000 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF SOUTHWEST MINNESOTA...NORTHERN LYON SOME OF THE CITIES INCLUDED IN THIS SEVERE THUNDERSTORM WARNING ARE MINNEOTA AND MARSHALL MINNESOTA. AT 855 AM CDT RADAR INDICATED A SEVERE THUNDERSTORM IN YELLOW MEDICINE COUNTY MINNESOTA OR ABOUT 45 MILES WESTNORTHWEST OF REDWOOD FALLS MINNESOTA MOVING SOUTHEAST AT 20 MPH. 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 AREA. THESE STORMS CAN AND OCCASIONALLY DO PRODUCE A TORNADO WITH LITTLE OR NO ADVANC3E 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, Jul 15, 3:29 AM CDT, 5 hours 30 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 325 AM CDT TUE JUL 15 1986 ...SEVERE THUNDERSTORMS WATCH NUMBER 375 WEST OF THE MISSOURI RIVER IN SOUTH CENTRAL DAKOTA HAS BEEN CANCELLED... SEVERE THUNDERSTORM WATCH NUMBER 375 WEST OF THE MISSOURI RIVER IN SOUTH CENTRAL SOUTH DAKOTA HAS BEEN CANCELLED. THE COUNTIES NO LONGER EFFECTED BY THIS WATCH ARE BENNETT..GREGORY..SOUTHERN HUGHS..JACKSON.. JONES..LYMAN..MELLETTE..SOUTHERN STANLEY..TODD AND TRIPP. TO THE EAST OF THE MISSOURI RIVER SEVERE THUNDERSTORM NUMBER 375 CONTINUES IN EFFECT FOR SOUTH CENTRAL AND SOUTHEAST SOUTH DAKOTA UNTIL 6 AM CDT. ALSO SEVERE THUNDERSTORMS WATCH NUMBER 376 CONTINUES IN EFFECT FOR NORTH CENTRAL AND NORTHEAST SOUTH DAKOTA EAST OF THE MISSOURI RIVER UNTIL 6 AM CDT. < BEHREND
Special weather statement, Jul 15, 3:31 AM CDT, 5 hours 28 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 330 AM CDT TUE JUL 15 1986 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR MOST OF CENTRAL AND EASTERN SOUTH DAKOTA UNTIL 6 AM CDT... AT 325 AM CDT... THERE WERE ISOLATED INTENSE THUNDERSTORMS WITH VERY HEAVY RAIN IN NORTHCENTRAL AND NORTHEASTERN SOUTH DAKOTA. THE STRONGEST THUNDERSTORM WAS 35 MILES SOUTHEAST OF MOBRIDGE...NEAR HOSMER. ANOTHER INTENSE THUNDERSTORM WAS 40 MILES NORTHEAST OF ABERDEEN...NEAR KIDDER. THESE THUNDERSTORMS ARE ALSO CABABLE OF PRODUCING STRONG WINDS AND HAIL. MOVEMENT WAS TOWARD THE EAST SOUTHEAST AT 20 MILES AN HOUR. OTHERWISE...THERE WERE SCATTERED THUNDERSTORMS ACROSS NORTHEASTERN AND SOUTHCENTRAL SOUTH DAKOTA. THESE THUNDERSTORMS WERE IN A 90 MILE WIDE AREA EXTENDING FROM 40 MILES NORTHEAST OF ABERDEEN TO WINNER. THESE THUNDERSTORMS WERE MOVING EAST AT 30 MILES AN HOUR. PRESTON/ORGISH
Special weather statement, Jul 15, 4:01 AM CDT, 4 hours 58 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 400 AM CDT TUE JUL 15 1986 ...SEVERE THUNDERSTORMS WATCH NUMBER 375 FOR SOUTHEAST SOUTH DAKOTA HAS BEEN CANCELLED... SEVER E THUNDERSTORM WATCH NUMBER 375 FOR SOUTHEAST SOUTH DAKOTA HAS BEEN CANCELLED. SEVERE THUNDERSTORMS WATCH NUMBER 376 FOR NORTH CENTRAL AND NORTHEAST SOUTH DAKOTA CONTINUES IN EFFECT UNTIL 6 AM CDT. BEHREND
Special weather statement, Jul 15, 4:39 AM CDT, 4 hours 20 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 438 AM CDT TUE JUL 15 1986 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR MOST OF NORTH CENTRAL AND NORTHEAST SOUTH DAKOTA UNTIL 6 AM CDT... AT 438 AM CDT... THERE WERE ISOLATED INTENSE THUNDERSTORMS WITH VERY HEAVY RAIN IN NORTHCENTRAL AND NORTHEASTERN SOUTH DAKOTA. THE STRONGEST THUNDERSTORM WAS 35 MILES SOUTHWEST OF ABERDEEN NEAR NORBECK. ANOTHER INTENSE THUNDERSTORM WAS 30 MILES NORTHEAST OF ABERDEEN...NEAR LANGFORD. THESE STORMS MAY PRODUCE HAIL ALONG WITH STRONG GUSTY WIND. OTHERWISE...THERE WERE SCATTERED THUNDERSTORMS WITH HEAVY RAIN IN NORTH CENTRAL AND NORTHEAST SOUTH DAKOTA. THUNDERRSTORMS WERE EAST OF A LINE FROM 30 MILES NORTHEAST OF MOBRIDGE TO NEAR WINNER. THUNDERSTORMS WERE MOVING EAST AT 25 MILES AN HOUR. PRESTON
Special weather statement, Jul 15, 5:37 AM CDT, 3 hours 22 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 535 AM CDT TUE JUL 15 1986 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR MOST OF NORTH CENTRAL AND NORTHEAST SOUTH DAKOTA UNTIL 6 AM CDT... AT 535 AM CDT... THERE WERE SCATTERED INTENSE THUNDERSTORMS WITH VERY HEAVY RAIN IN NORTHEAST SOUTH DAKOTA EXTENDING INTO SOUTHEAST NORTH DAKOTA AND WESTERN MINNESOTA. THESE STORMS MAY PRODUCE HAIL AND STRONG GUSTY W'IND. THUNDERSTORMS WERE NORTHEAST OF A LINE FROM 30 MILES SOUTHEAST OF MOBRIDGE TO NEAR WATERTOWN. THE STRONGEST STORM WAS 40 MILES NORTHWEST OF WATERTOWN NEAR WEBSTER. THUNDERSTORMS WERE MOVING EAST AT 30 MILES AN HOUR. PRESTON
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 15, 10:04 AM CDT | Severe Thunderstorm Warning | FSD | Cottonwood, Jackson, Nobles | 56 min |
| Jul 15, 10:04 AM CDT | Severe Thunderstorm Warning | FSD | Murray | 56 min |
| Jul 15, 11:01 AM CDT | Severe Thunderstorm Warning | FSD | Cottonwood, Jackson | 29 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 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.