Alert archive / South Dakota / Tornado Warnings in 1987
Tornado Warning 1, NWS Aberdeen, SD
NWS Aberdeen, SD issued this tornado warning at May 26, 1987, 8:00 PM MDT for Dewey County, South Dakota. It was in force for 30 min.
The area
The counties it named.
The facts
- Issued
- May 26, 1987, 8:00 PM MDT (02:00 UTC)
- Expired
- May 26, 1987, 8:30 PM MDT
- In force
- 30 min
- Issued by
- NWS Aberdeen, SD
- Area
- Whole counties
County Dewey County, SD
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
Bismarck Municip, ND (KBIS), launched 00:00Z, 2.0 hours before the alert went out and 180 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
- 7 J/kg
- Mixed-layer CIN
- -169 J/kg
- Mixed-layer LCL
- 840 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 91 m²/s²
- 0-3 km storm-relative helicity
- 114 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 KABR 270200 TORABR SDC041-270230- BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE ABERDEEN SD 800 PM MDT TUE MAY 26 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 830 PM MDT FOR PEOPLE IN THE FOLLOWING COUNTY OF NORTH CENTRAL SOUTH DAKOTA...DEWEY THIS WARNING INCLUDES THE ADJACENT WATERS OF THE MISSOURI RIVER. SOME OF THE CITIES INCLUDED IN THIS WARNING ARE TIMBER LAKE...TRAIL CITY...EAGLE BUTTE...RIDGEVIEW...PARADE. AT 755 PM MDT RADAR INDICATED A POSSIBLE TORNADO NEAR EAGLE BUTTE ...50 MILES SOUTH WEST OF MOBRIDGE...MOVING NORTH AT 25 MPH. AT 750 PM MDT AN UNCONFIRMED REPORT OF A FUNNEL WAS RECIEVED FROM EAGLE BUTTE...50 MILES SOUTH WEST OF MOBRIDGE. IF YOU ARE IN THE PATH OF THIS TORNADO...YOU SHOULD GO TO A BASEMENT SHELTER IF AVAILABLE. OTHERWISE GO TO A CENTRAL INTERIOR ROOM ON THE LOWEST FLOOR POSSIBLE. CARS AND MOBILE HOMES SHOUL5D BE ABANDONED FOR A REINFORCED BUILDING. KEEFE
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
Special weather statement, May 26, 6:14 PM MDT, 1 hour 46 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ABERDEEN SD 715 PM CDT TUE MAY 26 1987 ...TORNADO WATCH IN EFFECT UNTIL MIDNIGHT CDT... AT 710 PM CDT RADAR SHOWED THUNDERSTORMS WITH VERY HEAVY RAIN IN STANLEY COUNTY AND SOUTHERN DEWEY COUNTY OF CENTRAL SOUTH DAKOTA DAKOTA. THESE STORMS WERE MOVING NORTH AT 25 MPH. AT 635 PM CDT THESE THUNDERSTORMS PRODUCED 2 FUNNEL CLOUDS IN STANLEY COUNTY. THESE STORMS CAN BE EXPECTED TO PRODUCE SMALL HAIL...STRONG WINDS AND DANGEROUS LIGHTNING. IF YOU LIVE IN DEWEY COUNTY...OR IF YOU ARE CAMPING OR BOATING ALONG THE MISSOURI RIVER YOU SHOULD BE ESPECIALLY ALERT TO THE WEATHER CONDITIONS APPROACHING YOU UNTIL ABOUT 800 PM CDT WHEN THESE STORMS SHOULD DISSIPATE. KEEFE
Special weather statement, May 26, 6:54 PM MDT, 1 hour 6 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ABERDEEN SD 755 PM CDT TUE MAY 26 1987 ...TORNADO WATCH IN EFFECT UNTIL MIDNIGHT CDT... AT 750 PM CDT RADAR SHOWED THUNDERSTORMS...SOME INTENSE WITH VERY HEAVY RAIN IN DEWEY COUNTY OF CENTRAL SOUTH DAKOTA. THESE STORMS WERE MOVING NORTH AT ABOUT 25 MPH...AND WERE MOVING INTO WESTERN WALWORTH COUNTY AND SOUTHERN CORSON COUNTY. THESE STORMS CAN BE EXPECTED TO PRODUCE SMALL HAIL...STRONG WINDS AND DANGEROUS LIGHTNING. IF YOU LIVE IN DEWEY...CORSON...OR WALWORTH COUNTIES OR IF YOU ARE CAMPING OR BOATING ALONG THE MISSOURI RIVER YOU SHOULD BE ALERT TO RAPIDLY CHANGING WEATHER CONDITIONS AND BE PREPARED TO SEEK SHELTER UNTIL AROUND 900 PM CDT WHEN THESE STORMS SHOULD MOVE OUT OF THE AREA. KEEFE
Nearby
Tornado Warnings in South Dakota, 1987Every tornado warning in 1987Tornadoes 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.