Alert archive / South Dakota / Wind Advisories in 2021

Wind Advisory 21, NWS Rapid City, SD

October 30, 2021Meade County, Pennington County, South Dakota

NWS Rapid City, SD issued this wind advisory at Oct 30, 2021, 1:38 AM MDT for Meade County, Pennington County, South Dakota. It took effect at Oct 30, 2021, 3:00 AM MDT. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued
Oct 30, 2021, 1:38 AM MDT (07:38 UTC)
In effect from
Oct 30, 2021, 3:00 AM MDT
Expired
Oct 30, 2021, 12:00 PM MDT
In force
9 hr
Issued by
NWS Rapid City, SD

Counties Meade County, SD, Pennington County, SD

The radar

The Rapid City radar (KUDX), 18 km from the middle of the area, began a volume at 07:41 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, 7.6 hours before the alert went out and 26 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 2021-10-30Temperature 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 2021-10-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 69 square meters per square second.19395878Sfc1 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
3304 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
69 m²/s²
0-3 km storm-relative helicity
19 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

450 
WWUS73 KUNR 300738
NPWUNR

URGENT - WEATHER MESSAGE
National Weather Service Rapid City SD
138 AM MDT Sat Oct 30 2021

SDZ031-073-301800-
/O.NEW.KUNR.WI.Y.0021.211030T0900Z-211030T1800Z/
Pennington Co Plains-Southern Meade Co Plains-
Including the cities of Box Elder, Caputa, Wall, Ellsworth AFB, 
and Union Center
138 AM MDT Sat Oct 30 2021

...WIND ADVISORY IN EFFECT UNTIL NOON MDT TODAY...

* WHAT...Northwest winds increasing to 20 to 35 mph with gusts up
  to 45 mph expected.

* WHERE...The Pennington County Plains and the Southern Meade 
  County Plains.

* WHEN...Until noon MDT today.

* 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.

&&

$$
1 follow-up statement
281 
WWUS73 KUNR 301811
NPWUNR

URGENT - WEATHER MESSAGE
National Weather Service Rapid City SD
1211 PM MDT Sat Oct 30 2021

SDZ031-073-301915-
/O.EXP.KUNR.WI.Y.0021.000000T0000Z-211030T1800Z/
Pennington Co Plains-Southern Meade Co Plains-
Including the cities of Box Elder, Caputa, Wall, Ellsworth AFB, 
and Union Center
1211 PM MDT Sat Oct 30 2021

...WIND ADVISORY HAS EXPIRED...

$$

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.