Alert archive / Idaho / Wind Advisories in 2021

Wind Advisory 9, NWS Missoula, MT

October 23, 2021Idaho County, Idaho

NWS Missoula, MT issued this wind advisory at Oct 23, 2021, 3:41 PM PDT for Idaho County, Idaho. It took effect at Oct 24, 2021, 8:00 AM PDT. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued
Oct 23, 2021, 3:41 PM PDT (22:41 UTC)
In effect from
Oct 24, 2021, 8:00 AM PDT
Expired
Oct 24, 2021, 5:00 PM PDT
In force
9 hr
Issued by
NWS Missoula, MT

County Idaho County, ID

The radar

The Missoula radar (KMSX), 175 km from the middle of the area, began a volume at 22:41 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

Spokane, WA (KOTX), launched 12:00Z, 10.7 hours before the alert went out and 218 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, Spokane, WA at 12:00Z on 2021-10-23Temperature 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, Spokane, WA at 12:00Z on 2021-10-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 5 square meters per square second.1939Sfc1 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
926 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
5 m²/s²
0-3 km storm-relative helicity
4 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

499 
WWUS75 KMSO 232241
NPWMSO

URGENT - WEATHER MESSAGE
National Weather Service Missoula MT
441 PM MDT Sat Oct 23 2021

IDZ008-250000-
/O.NEW.KMSO.WI.Y.0009.211024T1500Z-211025T0000Z/
Lower Hells Canyon/Salmon River Region-
341 PM PDT Sat Oct 23 2021

...WIND ADVISORY IN EFFECT FROM 8 AM TO 5 PM PDT SUNDAY...

* WHAT...South winds 25 to 35 mph with gusts up to 45 mph 
  expected. Higher gusts expected over the terrain.

* WHERE...Lower Hells Canyon/Salmon River Region, including
  Whitebird Hill.

* WHEN...From 8 AM to 5 PM PDT Sunday.

* IMPACTS...Gusty winds could blow around unsecured objects. 
  Tree limbs could be blown down and a few power outages may 
  result.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$
1 follow-up statement
467 
WWUS75 KMSO 242339
NPWMSO

URGENT - WEATHER MESSAGE
National Weather Service Missoula MT
539 PM MDT Sun Oct 24 2021

IDZ008-250045-
/O.EXP.KMSO.WI.Y.0009.000000T0000Z-211025T0000Z/
Lower Hells Canyon/Salmon River Region-
439 PM PDT Sun Oct 24 2021

...WIND ADVISORY WILL EXPIRE AT 5 PM PDT THIS AFTERNOON...

$$

Nearby

Wind Advisories in Idaho, 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.