Alert archive / South Dakota / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 35, NWS Aberdeen, SD
NWS Aberdeen, SD issued this severe thunderstorm warning at Jul 9, 1987, 5:26 PM CDT for Sully County, South Dakota. It was in force for 64 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
- Jul 9, 1987, 5:26 PM CDT (22:26 UTC)
- Expired
- Jul 9, 1987, 6:30 PM CDT
- In force
- 64 min
- Issued by
- NWS Aberdeen, SD
- Area
- Whole counties
County Sully 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 |
|---|---|---|---|
| Jul 9, 6:28 PM CDT | Thunderstorm Wind 54 | Sully, 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, 10.4 hours before the alert went out and 138 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
- 854 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 30 m²/s²
- 0-3 km storm-relative helicity
- 101 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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
Local storm report, Jul 9, 4:53 PM CDT, 33 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
450 PM CDT THU JUL 9 1987
TIME: EVENT AND AREA:
230 PM MDT VERY HEAVY RAIN AND MARBLE SIZE HAIL AT GLEN CROSS
IN DEWEY COUNTY.
430 PM CDT FUNNEL CLOUD OVER MOBRIDGE SOUTH DAKOTA IN WALWORTH
COUNTY AS REPORTED BY CIVIL DEFENSE.
415 PM CDT GOLFBALL HAIL ALONG WITH 50 KNOT WIND AT THE WATER
PLANT (WEATHER OBSERVER) AT MOBRIDGE.
435 PM CDT TORNADO 5 MILES SOUTH OF MOBRIDGE REPORTED BY STATE
POLICE.
STUDNICKAThe office that day
Everything else NWS Aberdeen, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 9, 2:12 PM CDT | Severe Thunderstorm Warning | ABR | Corson, Dewey | 63 min |
| Jul 9, 3:21 PM CDT | Severe Thunderstorm Warning | ABR | Corson, Dewey | 69 min |
| Jul 9, 4:01 PM CDT | Severe Thunderstorm Warning | ABR | Campbell, Walworth | 59 min |
| Jul 9, 4:30 PM CDT | Severe Thunderstorm Warning | ABR | Stanley | 60 min |
| Jul 9, 4:33 PM CDT | Severe Thunderstorm Warning | ABR | Potter | 57 min |
| Jul 9, 4:59 PM CDT | Severe Thunderstorm Warning | ABR | Hughes, Stanley | 61 min |
| Jul 9, 5:05 PM CDT | Severe Thunderstorm Warning | ABR | Campbell, Potter, Walworth | 55 min |
| Jul 9, 5:52 PM CDT | Severe Thunderstorm Warning | ABR | McPherson | 68 min |
| Jul 9, 6:05 PM CDT | Tornado Warning | ABR | Hyde, Sully | 40 min |
| Jul 9, 6:12 PM CDT | Severe Thunderstorm Warning | ABR | Edmunds, Faulk, Walworth | 63 min |
| Jul 9, 6:36 PM CDT | Severe Thunderstorm Warning | ABR | Lyman | 69 min |
| Jul 9, 6:55 PM CDT | Severe Thunderstorm Warning | ABR | Hand, Hyde | 65 min |
Nearby
Severe Thunderstorm Warnings in South Dakota, 1987Every severe thunderstorm warning 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.