Alert archive / South Dakota / Flash Flood Warnings in 2022

Flash Flood Warning 9, NWS Aberdeen, SD

August 6, 20224 counties in South Dakota

NWS Aberdeen, SD issued this flash flood warning at Aug 6, 2022, 12:42 AM MDT for 4 counties in South Dakota. It was in force for 6 hr. 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 6, 2022, 12:42 AM MDT (06:42 UTC)
Expired: Aug 6, 2022, 6:45 AM MDT
In force: 6 hr
Issued by: NWS Aberdeen, SD
Area: Storm-based polygon
Flood severity: None

Counties Dewey County, SD, Potter County, SD, Stanley County, SD, Sully County, SD

The radar

The Aberdeen radar (KABR), 172 km from the middle of the area, began a volume at 06:46 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 nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 6.7 hours before the alert went out and 160 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2519 J/kg
Mixed-layer CIN: -82 J/kg
Mixed-layer LCL: 2092 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 184 m²/s²
0-3 km storm-relative helicity: 238 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.3

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood 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 flash flood warning went out at Aug 5, 5:28 PM MDT, 7 hours 14 minutes earlier.

Area forecast discussion, Aug 5, 5:28 PM MDT, 7 hours 14 minutes before

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Hazardous weather outlook, Aug 5, 2:35 PM MDT, 10 hours 7 minutes before

Hazardous Weather Outlook...UPDATED
National Weather Service Aberdeen SD
335 PM CDT Fri Aug 5 2022

MNZ039-046-SDZ005>008-010-011-016>023-033>037-045-048-051-062045-
Traverse-Big Stone-McPherson-Brown-Marshall-Roberts-Edmunds-Day-
Potter-Faulk-Spink-Clark-Codington-Grant-Hamlin-Deuel-Stanley-Sully-
Hughes-Hyde-Hand-Jones-Lyman-Buffalo-
335 PM CDT Fri Aug 5 2022 /235 PM MDT Fri Aug 5 2022/

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

.DAY ONE...This afternoon and tonight.

Isolated to scattered storms are expected overnight. A few of those
storms could become severe with large hail and strong winds being the
main threats. Heat indices will remain high until mid-evening.

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

Scattered showers and thunderstorms are expected through Sunday, but
severe weather is NOT anticipated.

.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.

SDZ003-004-009-015-062045-
Corson-Campbell-Walworth-Dewey-
335 PM CDT Fri Aug 5 2022 /235 PM MDT Fri Aug 5 2022/

This Hazardous Weather Outlook is for north central South Dakota.

.DAY ONE...This afternoon and tonight.

Scattered showers and thunderstorms are expected through Sunday, but
severe weather is NOT anticipated.

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

Scattered showers and thunderstorms are expected through Sunday, but
severe weather is NOT anticipated.

.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.

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 5, 6:09 PM MDT	Severe Thunderstorm Warning Considerable damage threat	ABR	Edmunds, Faulk	51 min
Aug 5, 6:27 PM MDT	Flash Flood Warning	ABR	Jones, Lyman	6 hr
Aug 5, 6:27 PM MDT	Severe Thunderstorm Warning	ABR	Brown, Day, Marshall	48 min
Aug 5, 6:45 PM MDT	Severe Thunderstorm Warning	ABR	Brown, Edmunds	30 min
Aug 5, 6:49 PM MDT	Severe Thunderstorm Warning Considerable damage threat	ABR	Brown	41 min
Aug 5, 7:02 PM MDT	Severe Thunderstorm Warning Considerable damage threat	ABR	Day, Marshall	30 min
Aug 5, 7:06 PM MDT	Severe Thunderstorm Warning	ABR	Brown, Marshall	39 min
Aug 5, 7:19 PM MDT	Special Weather Statement	ABR	Faulk	26 min
Aug 5, 7:31 PM MDT	Severe Thunderstorm Warning	ABR	Faulk, Spink	44 min
Aug 5, 8:12 PM MDT	Severe Thunderstorm Warning Considerable damage threat	ABR	Faulk, Spink	48 min
Aug 5, 8:41 PM MDT	Special Weather Statement	ABR	Clark	34 min
Aug 5, 9:05 PM MDT	Special Weather Statement	ABR	Day	25 min
Aug 5, 9:29 PM MDT	Special Weather Statement	ABR	Codington	31 min
Aug 5, 9:44 PM MDT	Special Weather Statement	ABR	Codington	31 min
Aug 5, 9:52 PM MDT	Severe Thunderstorm Warning Considerable damage threat	ABR	Codington, Deuel, Grant, Hamlin	38 min
Aug 5, 11:11 PM MDT	Severe Thunderstorm Warning	ABR	Grant, Roberts	64 min
Aug 6, 12:15 AM MDT	Severe Thunderstorm Warning	ABR	Grant	14 min
Aug 6, 12:28 AM MDT	Areal Flood Warning	ABR	Jones, Lyman	9 hr
Aug 6, 12:34 AM MDT	Areal Flood Warning	ABR	Grant, Roberts	6 hr
Aug 6, 2:32 AM MDT	Special Weather Statement	ABR	Day	43 min
Aug 5, 8:45 PM MDT	Special Weather Statement	ABR	Big Stone	30 min
Aug 6, 12:19 AM MDT	Severe Thunderstorm Warning	ABR	Big Stone	26 min

Nearby

Flash Flood Warnings in South Dakota, 2022 Every flash flood warning in 2022

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.