Alert archive / South Dakota / Flash Flood Warnings in 2019

Flash Flood Warning 2, NWS Rapid City, SD

May 26, 2019Haakon County, Meade County, Ziebach County, South Dakota

NWS Rapid City, SD issued this flash flood warning at May 26, 2019, 9:09 PM MDT for Haakon County, Meade County, Ziebach County, 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
May 26, 2019, 9:09 PM MDT (03:09 UTC)
Expired
May 27, 2019, 3:00 AM MDT
In force
6 hr
Issued by
NWS Rapid City, SD
Area
Storm-based polygon
Flood severity
None

Counties Haakon County, SD, Meade County, SD, Ziebach County, SD

The radar

The Rapid City radar (KUDX), 87 km from the middle of the area, began a volume at 03:11 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, 3.2 hours before the alert went out and 284 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 00:00Z on 2019-05-27Temperature 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 00:00Z on 2019-05-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 31 square meters per square second.1939587897Sfc1 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
2399 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
31 m²/s²
0-3 km storm-relative helicity
325 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 flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Rapid City, SD wrote its last area forecast discussion before this flash flood warning went out at May 26, 5:46 PM MDT, 3 hours 23 minutes earlier.

Area forecast discussion, May 26, 5:46 PM MDT, 3 hours 23 minutes before
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Hazardous weather outlook, May 26, 4:14 AM MDT, 16 hours 55 minutes before
Hazardous Weather Outlook
National Weather Service Rapid City SD
414 AM MDT Sun May 26 2019

SDZ001-002-012>014-024>032-041>044-046-047-049-072>074-WYZ054>058-
071-271015-
Harding-Perkins-Butte-Northern Meade Co Plains-Ziebach-
Northern Black Hills-Northern Foot Hills-Rapid City-
Southern Foot Hills-Central Black Hills-Southern Black Hills-
Custer Co Plains-Pennington Co Plains-Haakon-Fall River-
Oglala Lakota-Jackson-Bennett-Mellette-Todd-Tripp-
Sturgis/Piedmont Foot Hills-Southern Meade Co Plains-
Hermosa Foot Hills-Northern Campbell-Southern Campbell-
Western Crook-Wyoming Black Hills-Weston-Northeastern Crook-
414 AM MDT Sun May 26 2019 /514 AM CDT Sun May 26 2019/

This Hazardous Weather Outlook is for western South Dakota and
northeastern Wyoming.

.DAY ONE...Today and Tonight

Flooding continues across portions of the western South Dakota
plains. See the latest Flood Warnings and Statements for details.

Thunderstorms will develop this afternoon and evening, some of
which will be strong to severe. Heavy rain from these
thunderstorms could worsen flooding; see the latest Flood Watch
for details.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

Thunderstorms will continue into Monday morning. During somewhat
of a break in precipitation during the day, fog will develop
across some areas, especially around the Black Hills. Monday
evening, chances for thunderstorms will increase again, with the
potential for some strong storms with heavy rain.

Rain will persist into Tuesday. By Tuesday night, 1 to 2 inches of
total precipitation will be possible. See the latest Flood Watch
for details.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today.

&&

Stay tuned to NOAA weather radio for further updates...or check
our web site at weather.gov/rapidcity

In the hours before

Local storm report, May 26, 5:55 PM MDT, 3 hours 14 minutes before
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Special weather statement, May 26, 5:55 PM MDT, 3 hours 14 minutes before
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Local storm report, May 26, 6:16 PM MDT, 2 hours 53 minutes before
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Local storm report, May 26, 6:28 PM MDT, 2 hours 41 minutes before
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Special weather statement, May 26, 7:12 PM MDT, 1 hour 57 minutes before
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Local storm report, May 26, 8:10 PM MDT, 59 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
May 26, 6:14 PM MDTAreal Flood AdvisoryUNRMeade3 hr
May 26, 7:12 PM MDTSpecial Weather StatementUNRZiebach33 min
May 26, 7:16 PM MDTAreal Flood AdvisoryUNRMeade, Perkins, Ziebach3 hr
May 26, 7:36 PM MDTAreal Flood AdvisoryUNRMeade, Ziebach3 hr
May 27, 1:16 AM MDTRiver Flood WarningUNRLyman, Tripp5 days
May 27, 2:56 AM MDTAreal Flood WarningUNRHaakon, Meade, Ziebach36 hr
May 27, 6:35 AM MDTRiver Flood WarningUNRJackson71 hr
May 27, 8:30 AM MDTDense Fog AdvisoryUNRCuster, Lawrence, Meade, Pennington6 hr
May 27, 10:38 AM MDTRiver Flood WarningUNRJones, Mellette21 days
May 27, 3:41 PM MDTRiver Flood WarningUNRHaakon29 hr

Nearby

Flash Flood Warnings in South Dakota, 2019Every flash flood 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.