Alert archive / South Dakota / Flash Flood Warnings in 2014

Flash Flood Warning 3, NWS Rapid City, SD

June 27, 2014Perkins County, South Dakota

NWS Rapid City, SD issued this flash flood warning at Jun 27, 2014, 7:29 PM MDT for Perkins 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: Jun 27, 2014, 7:29 PM MDT (01:29 UTC)
Expired: Jun 28, 2014, 1:30 AM MDT
In force: 6 hr
Issued by: NWS Rapid City, SD
Area: Storm-based polygon
Flood severity: None

County Perkins County, SD

The radar

The Rapid City radar (KUDX), 154 km from the middle of the area, began a volume at 01:31 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

Rapid City, SD (KRAP), launched 00:00Z, 1.5 hours before the alert went out and 161 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: 398 J/kg
Mixed-layer CIN: -51 J/kg
Mixed-layer LCL: 1126 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 180 m²/s²
0-3 km storm-relative helicity: 207 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.4

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 Jun 27, 5:36 PM MDT, 1 hour 53 minutes earlier.

Area forecast discussion, Jun 27, 5:36 PM MDT, 1 hour 53 minutes before

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Hazardous weather outlook, Jun 27, 4:52 AM MDT, 14 hours 37 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE RAPID CITY SD
452 AM MDT FRI JUN 27 2014

SDZ001-002-012>014-024>032-041>044-046-047-049-072>074-WYZ054>058-
071-281400-
BENNETT-BUTTE-CENTRAL BLACK HILLS-CUSTER CO PLAINS-FALL RIVER-HAAKON-
HARDING-HERMOSA FOOT HILLS-JACKSON-MELLETTE-NORTHEASTERN CROOK-
NORTHERN BLACK HILLS-NORTHERN CAMPBELL-NORTHERN FOOT HILLS-
NORTHERN MEADE CO PLAINS-PENNINGTON CO PLAINS-PERKINS-RAPID CITY-
SHANNON-SOUTHERN BLACK HILLS-SOUTHERN CAMPBELL-SOUTHERN FOOT HILLS-
SOUTHERN MEADE CO PLAINS-STURGIS/PIEDMONT FOOT HILLS-TODD-TRIPP-
WESTERN CROOK-WESTON-WYOMING BLACK HILLS-ZIEBACH-
452 AM MDT (552 AM CDT) FRI JUN 27 2014

...FLASH FLOOD WATCH THROUGH THIS EVENING FOR PARTS OF
   NORTHEAST WYOMING AND MUCH OF WESTERN SOUTH DAKOTA...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN SOUTH DAKOTA AND
NORTHEASTERN WYOMING.

.DAY ONE...TODAY AND TONIGHT

THERE IS A SLIGHT RISK FOR SEVERE STORMS ACROSS WESTERN
SOUTH DAKOTA TODAY...ESPECIALLY DURING THE AFTERNOON
AND EVENING HOURS. LARGE HAIL AND DAMAGING WIND GUSTS ARE THE MAIN
THREAT. IN ADDITION...HEAVY RAINS ARE POSSIBLE...WHICH MAY PRODUCE
FLASH FLOODING.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

THERE IS A CHANCE OF THUNDERSTORMS FOR SATURDAY AND SUNDAY. SEVERE
THUNDERSTORMS ARE NOT EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED TODAY.

&&

STAY TUNED TO NOAA WEATHER RADIO FOR FURTHER DETAILS OR UPDATES...
OR CHECK OUR WEB SITE AT WEATHER.GOV/RAPIDCITY

In the hours before

Local storm report, Jun 27, 5:24 PM MDT, 2 hours 5 minutes before

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Local storm report, Jun 27, 5:25 PM MDT, 2 hours 4 minutes before

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Special weather statement, Jun 27, 5:41 PM MDT, 1 hour 48 minutes before

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Local storm report, Jun 27, 7:04 PM MDT, 25 minutes before

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Local storm report, Jun 27, 7:05 PM MDT, 24 minutes before

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Local storm report, Jun 27, 7:25 PM MDT, 4 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 27, 6:04 PM MDT	Severe Thunderstorm Warning	UNR	Custer, Pennington	56 min
Jun 27, 7:36 PM MDT	Flash Flood Warning	UNR	Perkins	6 hr
Jun 27, 7:37 PM MDT	Severe Thunderstorm Warning	UNR	Haakon, Jackson, Pennington	68 min
Jun 27, 8:59 PM MDT	Special Weather Statement	UNR	Haakon	31 min
Jun 27, 9:09 PM MDT	Special Weather Statement	UNR	Tripp	36 min
Jun 27, 9:29 PM MDT	Severe Thunderstorm Warning	UNR	Mellette, Todd, Tripp	76 min
Jun 27, 9:55 PM MDT	Areal Flood Advisory	UNR	Butte, Haakon, Harding, Meade, Pennington, Perkins and 1 more	12 hr
Jun 28, 1:18 AM MDT	Areal Flood Advisory	UNR	Harding, Perkins, Ziebach	12 hr
Jun 28, 2:57 PM MDT	Special Weather Statement	UNR	Bennett	48 min
Jun 28, 3:14 PM MDT	Special Weather Statement	UNR	Campbell	46 min
Jun 28, 5:51 PM MDT	Special Weather Statement	UNR	Crook	39 min

Nearby

Flash Flood Warnings in South Dakota, 2014 Every flash flood warning in 2014

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.