Alert archive / South Dakota / Flash Flood Watches in 2015

Flash Flood Watch 2, NWS Aberdeen, SD

June 21, 20157 counties in South Dakota

NWS Aberdeen, SD issued this flash flood watch at Jun 21, 2015, 3:34 PM CDT for 7 counties in South Dakota. It took effect at Jun 22, 2015, 12:00 AM CDT. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued
Jun 21, 2015, 3:34 PM CDT (20:34 UTC)
In effect from
Jun 22, 2015, 12:00 AM CDT
Expired
Jun 22, 2015, 5:06 AM CDT
In force
5 hr
Issued by
NWS Aberdeen, SD
Flood severity
None

Counties Faulk County, SD, Hand County, SD, Hughes County, SD, Hyde County, SD, Potter County, SD, Spink County, SD, Sully County, SD

The radar

The Aberdeen radar (KABR), 112 km from the middle of the area, began a volume at 20:36 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

Bismarck Municip, ND (KBIS), launched 12:00Z, 8.6 hours before the alert went out and 245 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, Bismarck Municip, ND at 12:00Z on 2015-06-21Temperature 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, Bismarck Municip, ND at 12:00Z on 2015-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -12 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
2128 m above ground
0-6 km bulk shear
57 kt
0-1 km storm-relative helicity
-12 m²/s²
0-3 km storm-relative helicity
92 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 20, 9:36 PM CDTSevere Thunderstorm WarningABRDewey, Potter, Walworth25 min
Jun 20, 8:33 PM CDTSpecial Weather StatementABRTraverse42 min

Nearby

Flash Flood Watches in South Dakota, 2015Every flash flood watch 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.