Alert archive / Iowa / Tornado Warnings in 1986
Tornado Warning 10, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this tornado warning at Jun 10, 1986, 7:02 PM CDT for O'Brien County, Iowa. It was in force for 28 min.
The area
The counties it named.
The facts
- Issued
- Jun 10, 1986, 7:02 PM CDT (00:02 UTC)
- Expired
- Jun 10, 1986, 7:30 PM CDT
- In force
- 28 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
County O'Brien 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, 0.0 hours before the alert went out and 206 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
- 3577 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- 48 m²/s²
- 0-3 km storm-relative helicity
- 100 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 KSUX 110008 TORSUX IAC141-110030- BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE SIOUX CITY IA 702 PM CDT TUE JUN 10 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 730 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF NORTHWEST IOWA...OBRIEN THIS WARNING INCLUDES THE CITIES OF HARTLEY, MONETA AT 700 PM CDT A TORNADO WAS REPORTED ON THE GROUND 60 MILES NORTHEAST OF SIOUX CITY...11/2 MILES NORTH OF PRIMGAR IN O-BRIEN COUNTY. THE STORM WAS MOVING NORTHEAST AT 20 MILES AN HOUR. IF YOU ARE IN THE PATH OF THIS TORNADO..GO TO A BASEMENT SHELTER OR A CENTRAL INTERIOR ROOM ON THE LOWEST FLOOR. ABANDON CARS AND MOBI*LE HOMES FOR A REINFORCED BUILDING IF AVAILABLE..IF NOT..LIE IN A NEARBY DITCH OR DEPRESSION. PLEASE ASK THE NEAREST LAW ENFORCEMENT AGENCY TO RELAY YOUR REPORT OF SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE. SHERLIN
What forecasters said that day
The local office's own words before this tornado 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, Jun 10, 3:14 PM CDT, 3 hours 48 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
315 PM CDT TUE JUN 10 1986
210 PM CDT...DOUGLAS COUNTY SHERIFF REPORTED TWO TORNADOES NEAR ARMOUR
SD...ONE 5 MILES SOUTHWEST AND THE OTHER JUST NORTHEAST OF
ARMOUR. ANOTHER REPORT RECEIVED AT THE SAME TIME OF A
TORNADO 5 MILES NORTHEAST OF LAKE ANDES WHICH WAS
APPARENTLY THE SAME ONE SOUTHWEST OF ARMOUR. TORNADOES
WERE ROPE LIKE ANyD SHORT LIVED. REPORT FROM ARMOUR AT
225 PM CDT INDICATED NO TORNADOES OR FUNNEL CLOUDS VISIBLE.
NO DAMAGE REPORTED.
WILLIAMSSpecial weather statement, Jun 10, 5:13 PM CDT, 1 hour 49 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 515 PM CDT MON JUN 9 1986 AT 445 PM CDT NUMEROUS INTENSE THUNDERSTORMS WERE IN SOUTHEAST SOUTH DAKOTA. THESE THUNDERSTORMS WERE BOUNDED BY AN AREA FROM DEL RAPIDS SOUTH DAKOTA TO 25 MILES EAST OF PICKSTOWN..YANKTON AND 15 MILES SOUTH OF SIOUX FALLS. THESE THUNDERSTORMS WERE MOVING NORTHEAST AT 30 30 MILES AN HOUR. HEAVY RAINS HAVE BEEN REPORTED IN DOUGLAS AND TURNER COUNTIES OF SOUTHEAST SOUTH DAKOTA. LOCALLY HEAVY RAIN..BRIEF GUSTY WINDS AND POSSIBLY SMALL HAIL CAN BE EXPECTED THESE THUNDERSTORMS AS THEY MOVE THROUGH THIS AREA UNTIL 630 PM CDT. LOCAL URBAN AND SMALL STREAM FLOODING ARE ALSO POSSIBLE THIS EVENING ACROSS SOUTHEAST SOUTH DAKOTA. STAY TUNED TO THIS STATION FOR FURTHER STATEMENTS. ANDERSON
Special weather statement, Jun 10, 6:08 PM CDT, 54 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 607 PM CDT TUE JUN 10 1986 ...THUNDERSTORMS ENTERING THE SIOUXLAND AREA... AT 600 PM CD RADAR INDICATED A LINE OF STRONG THUNDERSTORMS EXTENDING FROM SOUTHWEST MINNESOTA...ACROSS SOUTHEAST SOUTH DAKOTA... INTO NORTHEAST NEBRASKA. THE CLOSEST THUNDERSTORM TO SIOUX CITY IS 5 MILES TO THE NORTHWEST. THE THUNDERSTORMS ARE MOVING NORTHEAST AT 20 MILES ALONG A COLD FRONT. THESE THUNDERSTORMS HAVE PRODUCED PEA SIZE HAIL...HEAVY RAIN SHOWERS AND WINDS ESTIMATED BETWEEN 50 AND 60 MILES AN HOUR. PERSONS LIVING IN SOUTHEAST SOUTH DAKOTA...NORTHEAST NEBRASKA...AND NORTHWEST IOWA...INCLUDING THE SIOUX CITY AREA...SHOULD BE ON THE NT LOOKOUT FOR ANY SEVERE WEATHER AND TAKE SHELTER IMMEDIATELY IF OBSERVED. SHERLIN
Special weather statement, Jun 10, 6:21 PM CDT, 41 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 623 PM CDT TUE JUN 10 1986 ...INTENSE THUNDERSTORMS EXTREME SOUTHEAST SOUTH DAKOTA... AT 610 PM CDT RADAR SHOWED INTENSE THUNDERSTORMS OVER EXTREME SOUTHEAST SOUTH DAKOTA AND NORTHWEST IOWA. A CLUSTER OF INTENSE THUNDERSTORMS WAS BETWEEN PARKER SOUTH DAKOTA...HARRINGTON NEBRASKA ...SIOUX CITY IOWA AND SIBLEY IOWA. THE THUNDERSTORMS WERE MOVING NORTHEAST AT 25 MPH. THESE THUNDERSTORMS WILL PRODUCE VERY HEAVY RAIN AND SOME DANGEROUS CLOUD TO GROUND LIGHTNING. THE HEAVY RAINS MAY PRODUCE LOCAL URBAN AND SMALL STREAM FLOODING. HAIL AND STRONG WINDS MAY ALSO ACCOMPANY THESE THUNDERSTORMS. RESIDENTS IN AND NORTHcEAST OF THIS AREA SHOULD BE PREPARED FOR THE ADVERSE WEATHER THESE THUNDERSTORMS MAY PRODUCE AND MOVE TO A REINFORCED SHELTER IF NECESSARY. BLOOM
Nearby
Tornado Warnings in Iowa, 1986Every tornado warning in 1986Tornadoes 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.