Alert archive / Washington / Wind Chill Advisories in 2019

Wind Chill Advisory 1, NWS Spokane, WA

February 4, 2019Douglas County, Okanogan County, Washington

NWS Spokane, WA issued this wind chill advisory at Feb 4, 2019, 7:57 AM PST for Douglas County, Okanogan County, Washington. It was in force for 26 hr.

The area

The counties it named.

The facts

Issued: Feb 4, 2019, 7:57 AM PST (15:57 UTC)
Expired: Feb 5, 2019, 10:00 AM PST
In force: 26 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 16:02 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, 4.0 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 613 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: 104 m²/s²
0-3 km storm-relative helicity: 84 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this wind chill advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Spokane, WA wrote its last area forecast discussion before this wind chill advisory went out at Feb 3, 2:45 PM PST, 17 hours 12 minutes earlier.

Area forecast discussion, Feb 3, 2:45 PM PST, 17 hours 12 minutes before

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Nearby

Wind Chill Advisories in Washington, 2019 Every wind chill advisory in 2019

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.