Alert archive / South Dakota / Wind Advisories in 2021

Wind Advisory 3, NWS Rapid City, SD

January 20, 2021Harding County, Perkins County, South Dakota

NWS Rapid City, SD issued this wind advisory at Jan 20, 2021, 1:28 AM MST for Harding County, Perkins County, South Dakota. It took effect at Jan 20, 2021, 8:00 AM MST. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued
Jan 20, 2021, 1:28 AM MST (08:28 UTC)
In effect from
Jan 20, 2021, 8:00 AM MST
Expired
Jan 20, 2021, 2:39 PM MST
In force
7 hr
Issued by
NWS Rapid City, SD

Counties Harding County, SD, Perkins County, SD

The radar

The Rapid City radar (KUDX), 157 km from the middle of the area, began a volume at 08:30 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 (KUNR), launched 00:00Z, 8.5 hours before the alert went out and 163 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 00:00Z on 2021-01-20Temperature 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, Rapid City, SD at 00:00Z on 2021-01-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 95 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
1538 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
95 m²/s²
0-3 km storm-relative helicity
222 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

298 
WWUS73 KUNR 200828
NPWUNR

URGENT - WEATHER MESSAGE
National Weather Service Rapid City SD
128 AM MST Wed Jan 20 2021

SDZ001-002-202300-
/O.NEW.KUNR.WI.Y.0003.210120T1500Z-210120T2300Z/
Harding-Perkins-
Including the cities of Buffalo, Lemmon, and Bison
128 AM MST Wed Jan 20 2021

...WIND ADVISORY IN EFFECT FROM 8 AM THIS MORNING TO 4 PM MST
THIS AFTERNOON...

* WHAT...Northwest winds 25 to 35 mph with gusts to around 50 
  mph.

* WHERE...Harding County and Perkins County.

* WHEN...From 8 AM this morning to 4 PM MST this afternoon.

* IMPACTS...Sudden wind gusts can cause drivers to lose control,
  especially in lightweight or high profile vehicles. Strong winds
  can cause blowing dust, reduced visibility, and flying debris.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

&&

$$

For more information from the National Weather Service visit
http://weather.gov/unr
1 follow-up statement
406 
WWUS73 KUNR 202139
NPWUNR

URGENT - WEATHER MESSAGE
National Weather Service Rapid City SD
239 PM MST Wed Jan 20 2021

SDZ001-002-202245-
/O.CAN.KUNR.WI.Y.0003.000000T0000Z-210120T2300Z/
Harding-Perkins-
Including the cities of Buffalo, Lemmon, and Bison
239 PM MST Wed Jan 20 2021

...WIND ADVISORY IS CANCELLED...

Winds will slowly diminish the rest of the afternoon.

$$

For more information from the National Weather Service visit
http://weather.gov/unr

Nearby

Wind Advisories in South Dakota, 2021Every wind advisory in 2021

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.