Alert archive / South Dakota / Flash Flood Warnings in 2015

Flash Flood Warning 7, NWS Rapid City, SD

June 6, 2015Pennington County, South Dakota

NWS Rapid City, SD issued this flash flood warning at Jun 6, 2015, 12:31 PM MDT for Pennington County, South Dakota. It was in force for 3 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 6, 2015, 12:31 PM MDT (18:31 UTC)
Expired
Jun 6, 2015, 3:30 PM MDT
In force
3 hr
Issued by
NWS Rapid City, SD
Area
Storm-based polygon
Flood severity
None

County Pennington County, SD

The radar

The Rapid City radar (KUDX), 13 km from the middle of the area, began a volume at 18:31 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 12:00Z, 6.5 hours before the alert went out and 9 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, Rapid City, SD at 12:00Z on 2015-06-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 65 joules per kilogram.LCLLFCEL10008507005003002001001 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, Rapid City, SD at 12:00Z on 2015-06-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 133 square meters per square second.193958Sfc1 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
65 J/kg
Mixed-layer CIN
-190 J/kg
Mixed-layer LCL
1039 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
133 m²/s²
0-3 km storm-relative helicity
123 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 Jun 6, 3:21 AM MDT, 9 hours 10 minutes earlier.

Area forecast discussion, Jun 6, 3:21 AM MDT, 9 hours 10 minutes before
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Hazardous weather outlook, Jun 6, 3:37 AM MDT, 8 hours 54 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE RAPID CITY SD
337 AM MDT SAT JUN 6 2015

SDZ001-002-012>014-024>032-041>044-046-047-049-072>074-WYZ054>058-
071-070945-
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-SHANNON-
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-
337 AM MDT SAT JUN 6 2015

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

.DAY ONE...TODAY AND TONIGHT

SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED AGAIN
TODAY...MAINLY IN THE AFTERNOON AND EVENING HOURS. THERE IS A
SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS OF SOUTH
CENTRAL SOUTH DAKOTA THIS AFTERNOON AND EVENING. THESE STORM WILL
BE CAPABLE OF PRODUCING LARGE HAIL AND STRONG WIND GUSTS.

HIGH STREAM FLOWS WITH SOME MINOR FLOODING WILL CONTINUE ON SOME
CREEKS AND STREAMS IN THE BLACK HILLS AND THE ADJACENT PLAINS...AS
WELL AS PORTIONS OF NORTHEASTERN WYOMING. ADDITIONAL RAINFALL
TODAY ALONG WITH SATURATED SOILS COULD AGGRAVATE FLOODING
CONDITIONS.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

THERE IS A SLIGHT CHANCE OF THUNDERSTORMS SUNDAY ACROSS NORTHEAST
WYOMING THROUGH SOUTHWEST SOUTH DAKOTA. SEVERE WEATHER IS 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

Special weather statement, Jun 6, 11:57 AM MDT, 34 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RAPID CITY SD
1157 AM MDT SAT JUN 6 2015

SDZ028-061845-
CENTRAL BLACK HILLS SD-
1157 AM MDT SAT JUN 6 2015

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN PENNINGTON COUNTY
UNTIL 1245 PM MDT...

AT 1154 AM MDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM
OVER HILL CITY...MOVING NORTHEAST AT 10 MPH.

HALF INCH HAIL AND HEAVY RAIN CAN BE EXPECTED WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
HILL CITY...SHERIDAN LAKE...HARNEY PEAK AND PACTOLA RESERVOIR.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF ON OR NEAR SHERIDAN LAKE OR PACTOLA RESERVOIR...GET OUT OF THE
WATER AND MOVE INDOORS OR INSIDE A VEHICLE. REMEMBER...LIGHTNING CAN
STRIKE OUT TO 15 MILES FROM THE PARENT THUNDERSTORM. IF YOU CAN HEAR
THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. MOVE TO
SAFE SHELTER NOW. DO NOT BE CAUGHT ON THE WATER IN A THUNDERSTORM.

&&

LAT...LON 4394 10368 4407 10349 4393 10335 4385 10360
      4386 10361
TIME...MOT...LOC 1754Z 227DEG 10KT 4394 10356

TRIMARCHI
Local storm report, Jun 6, 12:26 PM MDT, 5 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
1226 PM MDT SAT JUN 06 2015

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1222 PM     HAIL             HILL CITY               43.93N 103.57W
06/06/2015  E1.25 INCH       PENNINGTON         SD   STORM CHASER

&&

ME

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 5, 8:41 PM MDTSpecial Weather StatementUNRFall River49 min
Jun 5, 8:52 PM MDTSpecial Weather StatementUNRFall River23 min
Jun 5, 9:38 PM MDTSpecial Weather StatementUNRFall River37 min
Jun 5, 10:45 PM MDTSpecial Weather StatementUNRFall River45 min
Jun 6, 11:57 AM MDTSpecial Weather StatementUNRCuster48 min
Jun 6, 1:26 PM MDTAreal Flood WarningUNRJackson, Pennington3 days
Jun 6, 1:31 PM MDTAreal Flood WarningUNRCuster, Pennington7 days
Jun 6, 2:09 PM MDTSevere Thunderstorm WarningUNRCuster, Pennington51 min
Jun 6, 4:16 PM MDTSpecial Weather StatementUNRTodd59 min
Jun 6, 4:24 PM MDTSpecial Weather StatementUNRTripp51 min
Jun 6, 4:53 PM MDTSevere Thunderstorm WarningUNRTodd, Tripp52 min
Jun 6, 5:06 PM MDTSevere Thunderstorm WarningUNRTodd, Tripp39 min
Jun 6, 5:51 PM MDTSpecial Weather StatementUNRTripp54 min
Jun 6, 4:46 PM MDTSpecial Weather StatementUNRWeston44 min
Jun 6, 5:00 PM MDTSevere Thunderstorm WarningUNRWeston60 min

Nearby

Flash Flood Warnings in South Dakota, 2015Every flash flood warning in 2015

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.