Alert archive / Washington / Wind Chill Advisories in 2021

Wind Chill Advisory 5, NWS Spokane, WA

December 27, 2021Douglas County, Okanogan County, Washington

NWS Spokane, WA issued this wind chill advisory at Dec 27, 2021, 7:32 PM PST for Douglas County, Okanogan County, Washington. It was in force for 16 hr.

The area

The counties it named.

The facts

Issued
Dec 27, 2021, 7:32 PM PST (03:32 UTC)
Expired
Dec 28, 2021, 12:00 PM PST
In force
16 hr
Issued by
NWS Spokane, WA

Counties Douglas County, WA, Okanogan County, WA

The radar

The Spokane radar (KOTX), 164 km from the middle of the area, began a volume at 03:36 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

Spokane, WA (KOTX), launched 00:00Z, 3.5 hours before the alert went out and 252 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 00:00Z on 2021-12-28Temperature 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 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 00:00Z on 2021-12-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 50 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
658 m above ground
0-6 km bulk shear
73 kt
0-1 km storm-relative helicity
50 m²/s²
0-3 km storm-relative helicity
114 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

069 
WWUS46 KOTX 280332
WSWOTX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Spokane WA
732 PM PST Mon Dec 27 2021

WAZ043-282000-
/O.NEW.KOTX.WC.Y.0005.211228T0332Z-211228T2000Z/
Okanogan Valley-
Including the cities of Brewster, Bridgeport, Omak, Oroville, and
Okanogan
732 PM PST Mon Dec 27 2021

...WIND CHILL ADVISORY IN EFFECT UNTIL NOON PST TUESDAY...

* WHAT...Very cold wind chills. Wind chills as low as 20 below zero.

* WHERE...Brewster, Bridgeport, Omak, Oroville, and Okanogan.

* WHEN...Until Noon PST Tuesday.

* IMPACTS...The dangerously cold wind chills could cause frostbite 
  on exposed skin in as little as 30 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use caution while traveling outside. Wear appropriate clothing, a 
hat, and gloves.

&&

$$

JW
1 follow-up statement
991 
WWUS46 KOTX 281957
WSWOTX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Spokane WA
1157 AM PST Tue Dec 28 2021

WAZ043-282100-
/O.EXP.KOTX.WC.Y.0005.000000T0000Z-211228T2000Z/
Okanogan Valley-
Including the cities of Brewster, Bridgeport, Omak, Oroville, and
Okanogan
1157 AM PST Tue Dec 28 2021

...WIND CHILL ADVISORY WILL EXPIRE AT NOON PST TODAY...

Wind chill values will improve briefly this afternoon.

$$

OTX

The office that day

Everything else NWS Spokane, WA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Dec 28, 2:53 PM PSTWind Chill AdvisoryOTXAdams, Douglas, Grant, Lincoln, Okanogan21 hr
Dec 28, 2:53 PM PSTWinter Weather AdvisoryOTXAsotin, Garfield, Spokane, Whitman19 hr

Nearby

Wind Chill Advisories in Washington, 2021Every wind chill 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.