Alert archive / South Dakota / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 110, NWS Aberdeen, SD
NWS Aberdeen, SD issued this severe thunderstorm warning at Jul 4, 2020, 8:41 PM CDT for Walworth County, South Dakota. It was in force for 49 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jul 4, 2020, 8:41 PM CDT (01:41 UTC)
- Expired
- Jul 4, 2020, 9:30 PM CDT
- In force
- 49 min
- Issued by
- NWS Aberdeen, SD
- Area
- Storm-based polygon
- Hail
- 1.5 in
- Wind
- 60.0 mph
County Walworth County, SD
The radar
The Aberdeen radar (KABR), 126 km from the middle of the area, began a volume at 01:41 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 4, 3:53 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 1.7 hours before the alert went out and 141 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
- 2388 J/kg
- Mixed-layer CIN
- -17 J/kg
- Mixed-layer LCL
- 1563 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- 70 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.1
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.
NWS Aberdeen, SD wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 4, 6:31 PM CDT, 2 hours 10 minutes earlier.
Area forecast discussion, Jul 4, 6:31 PM CDT, 2 hours 10 minutes before
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</html>Hazardous weather outlook, Jul 4, 4:40 AM CDT, 16 hours 1 minute before
Hazardous Weather Outlook National Weather Service Aberdeen SD 440 AM CDT Sat Jul 4 2020 MNZ039-046-SDZ003>011-015>023-033>037-045-048-051-050945- Traverse-Big Stone-Corson-Campbell-McPherson-Brown-Marshall-Roberts- Walworth-Edmunds-Day-Dewey-Potter-Faulk-Spink-Clark-Codington-Grant- Hamlin-Deuel-Stanley-Sully-Hughes-Hyde-Hand-Jones-Lyman-Buffalo- 440 AM CDT Sat Jul 4 2020 /340 AM MDT Sat Jul 4 2020/ This Hazardous Weather Outlook is for west central Minnesota, central South Dakota, north central South Dakota and northeast South Dakota. .DAY ONE...Today and tonight. Strong to potential severe storms can be expected over north-central South Dakota through the morning hours today. Winds, exceeding 60 mph and small hail will be possible with these storms. Additional thunderstorms will be possible tonight, mainly for locations north of Highway 212. Gusty winds and hail will be possible with some storms. .DAYS TWO THROUGH SEVEN...Sunday through Friday. Strong to severe storms will be possible late Sunday afternoon through the evening hours. Large hail exceeding 2 inches in diameter, and gusty winds of 60-70 mph will be the main severe threats. .SPOTTER INFORMATION STATEMENT... Spotter activation may be requested. Weather spotters are encouraged to submit reports to the National Weather Service in Aberdeen. The public can submit reports on our web page, Facebook page, or our Twitter feed. SD
In the hours before
Local storm report, Jul 4, 7:04 PM CDT, 1 hour 37 minutes before
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</html>Local storm report, Jul 4, 7:11 PM CDT, 1 hour 30 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
711 PM CDT SAT JUL 4 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0658 PM TSTM WND DMG 10 SW LONG LAKE 45.77N 99.36W
07/04/2020 MCPHERSON SD MESONET
MESONET STATION 184 EUREKA (SDDOT).
&&
KFLocal storm report, Jul 4, 7:59 PM CDT, 42 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
759 PM CDT SAT JUL 4 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0745 PM TSTM WND GST 2 W RICHMOND LAKE REC A 45.54N 98.64W
07/04/2020 M58 MPH BROWN SD MESONET
MESONET STATION EW9368 ABERDEEN 9 NW.
&&
KFLocal storm report, Jul 4, 8:19 PM CDT, 22 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
819 PM CDT SAT JUL 4 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0800 PM TSTM WND GST 2 NE MINA 45.46N 98.73W
07/04/2020 M50 MPH EDMUNDS SD NWS EMPLOYEE
PERSONAL WEATHER STATION.
&&
RLLocal storm report, Jul 4, 8:26 PM CDT, 15 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
826 PM CDT SAT JUL 4 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0818 PM TSTM WND GST 2 NE MINA 45.46N 98.73W
07/04/2020 M66 MPH EDMUNDS SD NWS EMPLOYEE
DAMAGE WAS ALSO REPORTED AT MINA LAKE.
&&
RLSpecial weather statement, Jul 4, 8:29 PM CDT, 12 minutes before
Special Weather Statement
National Weather Service Aberdeen SD
829 PM CDT Sat Jul 4 2020
SDZ009-050215-
Walworth SD-
829 PM CDT Sat Jul 4 2020
...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL WALWORTH COUNTY UNTIL 915
PM CDT...
At 828 PM CDT, Doppler radar was tracking a strong thunderstorm over
Selby, moving south at 20 mph.
Nickel size hail and wind gusts up to 50 mph will be possible with
this storm.
Locations impacted include...
Selby, Akaska, Lowry, New Everets Resort and Lake Hiddenwood Rec
Area.
A Severe Thunderstorm Watch remains in effect until midnight CDT for
north central South Dakota.
LAT...LON 4557 9989 4529 9999 4535 10029 4539 10028
4543 10032 4559 10016 4559 10004
TIME...MOT...LOC 0128Z 010DEG 17KT 4552 10004
LueckThe office that day
Everything else NWS Aberdeen, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 4, 7:04 PM CDT | Severe Thunderstorm Warning | ABR | Brown, Edmunds, McPherson | 41 min |
| Jul 4, 7:27 PM CDT | Severe Thunderstorm Warning | ABR | Stanley | 19 min |
| Jul 4, 7:48 PM CDT | Severe Thunderstorm Warning | ABR | Brown, Edmunds, McPherson | 57 min |
| Jul 4, 7:59 PM CDT | Severe Thunderstorm Warning | ABR | Campbell, Edmunds, McPherson, Walworth | 46 min |
| Jul 4, 8:29 PM CDT | Special Weather Statement | ABR | Walworth | 46 min |
| Jul 4, 8:39 PM CDT | Severe Thunderstorm Warning | ABR | Faulk, Hand, Spink | 51 min |
| Jul 4, 8:44 PM CDT | Severe Thunderstorm Warning | ABR | Brown, Edmunds | 46 min |
| Jul 4, 8:52 PM CDT | Severe Thunderstorm Warning | ABR | Edmunds, Faulk, Hand | 68 min |
| Jul 4, 9:17 PM CDT | Severe Thunderstorm Warning | ABR | Edmunds, Potter, Walworth | 43 min |
| Jul 4, 9:30 PM CDT | Severe Thunderstorm Warning | ABR | Faulk, Hand, Spink | 60 min |
| Jul 4, 9:41 PM CDT | Tornado Warning | ABR | Faulk, Spink | 21 min |
| Jul 4, 9:50 PM CDT | Severe Thunderstorm Warning | ABR | Edmunds, Faulk, Potter, Walworth | 40 min |
| Jul 4, 10:07 PM CDT | Special Weather Statement | ABR | Campbell | 38 min |
| Jul 4, 11:18 PM CDT | Areal Flood Warning | ABR | Hand | 12 hr |
| Jul 4, 11:22 PM CDT | Special Weather Statement | ABR | Hyde | 38 min |
| Jul 5, 12:00 AM CDT | Severe Thunderstorm Warning | ABR | Hand, Hyde | 30 min |
| Jul 5, 12:45 AM CDT | Areal Flood Warning | ABR | Hand | 60 hr |
| Jul 5, 12:54 AM CDT | Special Weather Statement | ABR | Hand | 36 min |
| Jul 5, 1:08 AM CDT | Special Weather Statement | ABR | Corson | 52 min |
| Jul 5, 12:34 PM CDT | Flash Flood Watch | ABR | Brown, Edmunds, Faulk, Hand, Hyde, McPherson and 1 more | 15 hr |
| Jul 5, 1:01 PM CDT | Special Weather Statement | ABR | Spink | 29 min |
| Jul 5, 4:02 PM CDT | Special Weather Statement | ABR | Marshall | 28 min |
| Jul 5, 4:24 PM CDT | Severe Thunderstorm Warning | ABR | Jones, Stanley | 51 min |
| Jul 5, 4:36 PM CDT | Severe Thunderstorm Warning | ABR | Jones, Stanley | 39 min |
| Jul 5, 5:15 PM CDT | Special Weather Statement | ABR | Jones | 45 min |
| Jul 5, 5:19 PM CDT | Severe Thunderstorm Warning | ABR | Jones, Lyman | 41 min |
| Jul 5, 5:42 PM CDT | Severe Thunderstorm Warning | ABR | Hughes, Lyman | 48 min |
| Jul 5, 5:53 PM CDT | Severe Thunderstorm Warning | ABR | Jones, Lyman | 52 min |
| Jul 5, 6:07 PM CDT | Severe Thunderstorm Warning | ABR | Faulk, Hand, Spink | 53 min |
| Jul 5, 6:32 PM CDT | Severe Thunderstorm Warning | ABR | Faulk, Hand, Spink | 48 min |
| Jul 5, 6:42 PM CDT | Severe Thunderstorm Warning | ABR | Lyman | 78 min |
Nearby
Severe Thunderstorm Warnings in South Dakota, 2020Every severe thunderstorm warning in 2020
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; radar from the NEXRAD Level II archive.