Alert archive / Washington / Snow Advisories in 2006

Snow Advisory 6, NWS Spokane, WA

January 12, 20064 counties in Washington

NWS Spokane, WA issued this snow advisory at Jan 12, 2006, 4:21 AM PST for 4 counties in Washington. It took effect at Jan 12, 2006, 12:45 PM PST. It was in force for 21 hr.

The area

The counties it named.

The facts

Issued: Jan 12, 2006, 4:21 AM PST (12:21 UTC)
In effect from: Jan 12, 2006, 12:45 PM PST
Expired: Jan 13, 2006, 10:03 AM PST
In force: 21 hr
Issued by: NWS Spokane, WA

Counties Chelan County, WA, Douglas County, WA, Grant County, WA, Okanogan County, WA

The radar

The Spokane radar (KOTX), 169 km from the middle of the area, began a volume at 12:20 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, 0.4 hours before the alert went out and 260 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: 866 m above ground
0-6 km bulk shear: 84 kt
0-1 km storm-relative helicity: 66 m²/s²
0-3 km storm-relative helicity: 56 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 snow 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 snow advisory went out at Jan 12, 3:45 AM PST, 36 minutes earlier.

Area forecast discussion, Jan 12, 3:45 AM PST, 36 minutes before

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Hazardous weather outlook, Jan 11, 4:28 PM PST, 11 hours 53 minutes before

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    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
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        Please try again in a few minutes.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 12, 4:21 AM PST	Winter Storm Watch	OTX	Chelan, Douglas, Ferry, Grant, Okanogan, Pend Oreille and 2 more	12 hr
Jan 12, 12:45 PM PST	Winter Storm Warning	OTX	Ferry, Okanogan, Pend Oreille, Spokane, Stevens	39 hr

Nearby

Snow Advisories in Washington, 2006 Every snow advisory in 2006

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.