Alert archive / South Dakota / Tornado Warnings in 1987
Tornado Warning 25, NWS Aberdeen, SD
NWS Aberdeen, SD issued this tornado warning at Aug 15, 1987, 3:34 PM CDT for Brown County, Spink County, South Dakota. It was in force for 26 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Aug 15, 1987, 3:34 PM CDT (20:34 UTC)
- Expired
- Aug 15, 1987, 4:00 PM CDT
- In force
- 26 min
- Issued by
- NWS Aberdeen, SD
- Area
- Whole counties
Counties Brown County, SD, Spink County, SD
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 15, 4:00 PM CDT | Thunderstorm Wind 52 | Brown, SD |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Aberdeen, SD (KHON), launched 12:00Z, 8.6 hours before the alert went out and 41 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
- 1389 J/kg
- Mixed-layer CIN
- -261 J/kg
- Mixed-layer LCL
- 1459 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 94 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 KABR 152034 TORABR SDC013-115-152100- BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE ABERDEEN SD 334 PM CDT SAT AUG 15 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 400 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF NORTHEAST SOUTH DAKOTA...SOUTH AND CENTRAL BROWN AND NORTHERN SPINK SOME OF THE CITIES INCLUDED IN THIS WARNING ARE ABERDEEN MELLETTE WARNER GROTON COLUMBIA BATH STRATFORD FERNEY AT 227 PM CDT A FUNNEL CLOUD WAS REPORTED 3 MILES SOUTH OF MANSFIELD MOVING NE 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 SHOULD BE ABANDONED FOR A REINFORCED BUILDING. HUSTON
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, Aug 15, 2:30 PM CDT, 1 hour 4 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ABERDEEN SD 230 PM CDT SAT AUG 15 1987 AT 220 PM CDT RADAR INDICATED AN INTENSE THUNDERSTORM HAD DEVELOPED RAPIDLY 15 MILES SOUTHWEST OF ABERDEEN IN NORTHEAST SOUTH DAKOTA. MOVEMENT WAS NORTHEAST AT 25 MPH. THIS STORM WILL MOVE OVER ABERDEEN BY 300 PM. THIS STORM CONTAINS VERY HEAVY RAIN...SMALL HAIL AND STRONG GUSTY WINDS. INDIVIDUALS IN BROWN COUNTY SHOULD REMAIN ALERT FOR THREATENING WEATHER AND SEEK SHELTER IF NECESSARY. HUSTON
The office that day
Everything else NWS Aberdeen, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 15, 2:44 PM CDT | Severe Thunderstorm Warning | ABR | Brown | 61 min |
| Aug 15, 3:05 PM CDT | Tornado Warning | ABR | Brown, Spink | 25 min |
| Aug 15, 4:06 PM CDT | Severe Thunderstorm Warning | ABR | Brown, Spink | 69 min |
| Aug 15, 4:51 PM CDT | Severe Thunderstorm Warning | ABR | Day, Marshall | 69 min |
| Aug 15, 5:45 PM CDT | Severe Thunderstorm Warning | ABR | Clark | 60 min |
| Aug 15, 6:18 PM CDT | Severe Thunderstorm Warning | ABR | Codington, Hamlin | 57 min |
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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.