Alert archive / South Dakota / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 149, NWS Aberdeen, SD

August 9, 2019Buffalo County, Hughes County, Lyman County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Aug 9, 2019, 5:21 PM CDT for Buffalo County, Hughes County, Lyman County, South Dakota. It was in force for 54 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
Aug 9, 2019, 5:21 PM CDT (22:21 UTC)
Expired
Aug 9, 2019, 6:15 PM CDT
In force
54 min
Issued by
NWS Aberdeen, SD
Area
Storm-based polygon
Tornado
Possible
Hail
1.0 in
Wind
60.0 mph

Counties Buffalo County, SD, Hughes County, SD, Lyman County, SD

The radar

The Aberdeen radar (KABR), 179 km from the middle of the area, began a volume at 22:23 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.

IssuedProductOfficeLasted
Aug 9, 2:09 PM CDTTornado WatchSPC7 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 10.4 hours before the alert went out and 134 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.

Skew-T log-pSkew-T log-p diagram, Aberdeen, SD at 12:00Z on 2019-08-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Aberdeen, SD at 12:00Z on 2019-08-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 54 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1665 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
54 m²/s²
0-3 km storm-relative helicity
134 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

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 Aug 9, 3:27 PM CDT, 1 hour 54 minutes earlier.

Area forecast discussion, Aug 9, 3:27 PM CDT, 1 hour 54 minutes before
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Hazardous weather outlook, Aug 9, 3:35 AM CDT, 13 hours 46 minutes before
Hazardous Weather Outlook
National Weather Service Aberdeen SD
335 AM CDT Fri Aug 9 2019

MNZ039-046-SDZ007-008-011-019>023-100845-
Traverse-Big Stone-Marshall-Roberts-Day-Clark-Codington-Grant-Hamlin-
Deuel-
335 AM CDT Fri Aug 9 2019

This Hazardous Weather Outlook is for west central Minnesota and
northeast South Dakota.

.DAY ONE...Today and tonight.

There is a low risk for severe weather this afternoon, however the
main concern will be storms that develop late this evening and
overnight. Storms are expected to form and move along an axis that
could result in a few rounds of heavy rainfall with the potential for
flooding. Some uncertainty exists where this boundary will set up,
and not all locations in northeast South Dakota/western Minnesota
will see heavy rain.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

Another system late Sunday into Monday has the potential to bring
heavy rainfall to the region.

.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.

SDZ015-016-033>037-045-048-051-100845-
Dewey-Potter-Stanley-Sully-Hughes-Hyde-Hand-Jones-Lyman-Buffalo-
335 AM CDT Fri Aug 9 2019 /235 AM MDT Fri Aug 9 2019/

This Hazardous Weather Outlook is for central South Dakota and
north central South Dakota.

.DAY ONE...Today and tonight.

Severe storms are possible from around mid day into the afternoon
with the risk for large hail, damaging winds, and brief heavy
downpours being the main threat. This also includes the risk for a
tornado or two.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

Another system late Sunday into Monday has the potential to bring
heavy rainfall to the region.

.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.

SDZ003>006-009-010-017-018-100845-
Corson-Campbell-McPherson-Brown-Walworth-Edmunds-Faulk-Spink-
335 AM CDT Fri Aug 9 2019 /235 AM MDT Fri Aug 9 2019/

This Hazardous Weather Outlook is for north central South Dakota
and northeast South Dakota.

.DAY ONE...Today and tonight.

Severe storms are possible from around mid day into the afternoon
with the risk for large hail, damaging winds, and brief heavy
downpours being the main threat.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

Another system late Sunday into Monday has the potential to bring
heavy rainfall to the region.

.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.

Connelly

In the hours before

Local storm report, Aug 9, 3:27 PM CDT, 1 hour 54 minutes before
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Local storm report, Aug 9, 4:07 PM CDT, 1 hour 14 minutes before
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Local storm report, Aug 9, 4:20 PM CDT, 1 hour 1 minute before
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Local storm report, Aug 9, 4:30 PM CDT, 51 minutes before
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Local storm report, Aug 9, 4:54 PM CDT, 27 minutes before
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The office that day

Everything else NWS Aberdeen, SD issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 9, 12:26 PM CDTFlood WatchABRBrown, Buffalo, Campbell, Clark, Codington, Corson and 20 more9 hr
Aug 9, 2:04 PM CDTSevere Thunderstorm WarningABRDewey, Potter, Sully41 min
Aug 9, 2:30 PM CDTSevere Thunderstorm WarningABRDewey, Stanley, Sully45 min
Aug 9, 2:45 PM CDTSevere Thunderstorm WarningABRHyde, Sully45 min
Aug 9, 2:57 PM CDTSevere Thunderstorm WarningABRJones48 min
Aug 9, 3:02 PM CDTSevere Thunderstorm WarningABRHughes, Stanley, Sully43 min
Aug 9, 3:11 PM CDTSevere Thunderstorm WarningABRSully34 min
Aug 9, 3:24 PM CDTSevere Thunderstorm WarningABRHyde36 min
Aug 9, 3:33 PM CDTSevere Thunderstorm WarningABRHughes, Stanley42 min
Aug 9, 3:47 PM CDTSevere Thunderstorm WarningABRJones43 min
Aug 9, 3:47 PM CDTSevere Thunderstorm WarningABRHughes, Stanley28 min
Aug 9, 4:00 PM CDTSevere Thunderstorm WarningABRHughes, Stanley30 min
Aug 9, 4:02 PM CDTAreal Flood WarningABRHughes, Stanley3 hr
Aug 9, 4:15 PM CDTSevere Thunderstorm WarningABRHughes30 min
Aug 9, 4:16 PM CDTSevere Thunderstorm WarningABRJones, Lyman, Stanley44 min
Aug 9, 4:18 PM CDTTornado WarningABRHughes27 min
Aug 9, 4:26 PM CDTSevere Thunderstorm WarningABRJones, Lyman29 min
Aug 9, 4:26 PM CDTSevere Thunderstorm WarningABRHughes, Stanley34 min
Aug 9, 4:33 PM CDTAreal Flood WarningABRHughes, Stanley3 hr
Aug 9, 4:43 PM CDTAreal Flood WarningABRHughes6 hr
Aug 9, 4:47 PM CDTSevere Thunderstorm WarningABRHughes, Lyman, Stanley43 min
Aug 9, 5:34 PM CDTSevere Thunderstorm WarningABRLyman56 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2019Every severe thunderstorm warning in 2019

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.