Alert archive / South Dakota / Wind Advisories in 2020

Wind Advisory 34, NWS Rapid City, SD

November 7, 202010 counties in South Dakota

NWS Rapid City, SD issued this wind advisory at Nov 7, 2020, 1:39 PM MST for 10 counties in South Dakota. It took effect at Nov 7, 2020, 11:00 PM MST. It was in force for 19 hr.

The area

The counties it named.

The facts

Issued
Nov 7, 2020, 1:39 PM MST (20:39 UTC)
In effect from
Nov 7, 2020, 11:00 PM MST
Expired
Nov 8, 2020, 6:00 PM MST
In force
19 hr
Issued by
NWS Rapid City, SD

Counties Bennett County, SD, Butte County, SD, Haakon County, SD, Harding County, SD, Jackson County, SD, Lawrence County, SD, Meade County, SD, Oglala Lakota County, SD, Perkins County, SD, Ziebach County, SD

The radar

The Rapid City radar (KUDX), 44 km from the middle of the area, began a volume at 20:37 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 12:00Z, 8.7 hours before the alert went out and 328 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 12:00Z on 2020-11-07Temperature 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 12:00Z on 2020-11-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 227 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
1532 m above ground
0-6 km bulk shear
79 kt
0-1 km storm-relative helicity
227 m²/s²
0-3 km storm-relative helicity
281 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Nov 7, 1:23 AM MSTHigh Wind WatchUNRBennett, Jackson, Mellette, Oglala Lakota, Todd, Tripp12 hr
Nov 7, 3:32 AM MSTDense Fog AdvisoryUNRHarding, Perkins5 hr
Nov 7, 1:39 PM MSTHigh Wind WarningUNRMellette, Todd, Tripp21 hr

Nearby

Wind Advisories in South Dakota, 2020Every wind advisory in 2020

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.