Alert archive / South Dakota / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 40, NWS Aberdeen, SD
NWS Aberdeen, SD issued this severe thunderstorm warning at Jul 10, 1987, 4:26 PM CDT for Jones County, South Dakota. It was in force for 64 min. 2 reports 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 10, 1987, 4:26 PM CDT (21:26 UTC)
- Expired
- Jul 10, 1987, 5:30 PM CDT
- In force
- 64 min
- Issued by
- NWS Aberdeen, SD
- Area
- Whole counties
County Jones 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 10, 4:55 PM CDT | Hail 2.75 | Jones, SD | |
| Jul 10, 5:20 PM CDT | Hail 1 | Jones, 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
Rapid City, SD (KRAP), launched 12:00Z, 9.4 hours before the alert went out and 176 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
- 136 J/kg
- Mixed-layer CIN
- -314 J/kg
- Mixed-layer LCL
- 1547 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 187 m²/s²
- 0-3 km storm-relative helicity
- 275 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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
Special weather statement, Jul 10, 4:22 PM CDT, 4 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ABERDEEN SD 420 PM CDT FRI JUL 10 1987 AT 410 PM CDT RADAR INDICATED INTENSE THUNDERSTORMS ALONG THE MISSOURI RIVER 5 MILES WEST OF AKASKA OR 15 MILES SOUTHEAST OF MOBRIDGE SOUTH DAKOTA AND 30 MILES EAST NORTHEAST OF MOBRIDGE. THE THUNDERSTORMS WERE MOVING NORTHEAST AT 30 MPH. PERSONS IN WESTERN MCPHERSON AND ALL OF WALWORTH COUNTY SHOULD BE ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS AND PREPKARE TO TAKE SHELTER IF WEATHER THREATENS. GILLESPIE
The office that day
Everything else NWS Aberdeen, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 9, 7:20 PM CDT | Tornado Warning | ABR | Brown | 25 min |
| Jul 9, 8:13 PM CDT | Tornado Warning | ABR | Day | 32 min |
| Jul 10, 4:50 PM CDT | Severe Thunderstorm Warning | ABR | Stanley | 55 min |
| Jul 10, 5:06 PM CDT | Tornado Warning | ABR | Stanley | 39 min |
| Jul 10, 5:53 PM CDT | Tornado Warning | ABR | Sully | 37 min |
| Jul 10, 6:05 PM CDT | Severe Thunderstorm Warning | ABR | Stanley | 55 min |
| Jul 10, 6:13 PM CDT | Severe Thunderstorm Warning | ABR | Potter, Walworth | 62 min |
| Jul 10, 6:55 PM CDT | Severe Thunderstorm Warning | ABR | Edmunds | 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.