Alert archive / Washington / Heavy Snow Warnings in 2007

Heavy Snow Warning 11, NWS Spokane, WA

November 28, 200711 counties in Washington; 8 counties in Idaho

NWS Spokane, WA issued this heavy snow warning at Nov 28, 2007, 3:53 AM PST for 11 counties in Washington; 8 counties in Idaho. It took effect at Nov 28, 2007, 9:51 AM PST. It was in force for 29 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Nov 28, 2007, 3:53 AM PST (11:53 UTC)
In effect from: Nov 28, 2007, 9:51 AM PST
Expired: Nov 29, 2007, 3:07 PM PST
In force: 29 hr
Issued by: NWS Spokane, WA

Counties Benewah County, ID, Bonner County, ID, Boundary County, ID, Kootenai County, ID, Latah County, ID, Lewis County, ID, Nez Perce County, ID, Shoshone County, ID, Adams County, WA, Asotin County, WA, Douglas County, WA, Garfield County, WA, Grant County, WA, Lincoln County, WA, Okanogan County, WA, Pend Oreille County, WA, Spokane County, WA, Stevens County, WA, Whitman County, WA

The radar

The Spokane radar (KOTX), 31 km from the middle of the area, began a volume at 11:50 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, 11.9 hours before the alert went out and 90 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: 1022 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 103 m²/s²
0-3 km storm-relative helicity: 88 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 heavy snow warning 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 heavy snow warning went out at Nov 27, 3:57 PM PST, 11 hours 56 minutes earlier.

Area forecast discussion, Nov 27, 3:57 PM PST, 11 hours 56 minutes before

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Hazardous weather outlook, Nov 27, 3:37 PM PST, 12 hours 16 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 28, 3:53 AM PST	Snow Advisory	OTX	Adams, Chelan, Douglas, Ferry, Grant, Lincoln and 4 more	26 hr

Nearby

Heavy Snow Warnings in Washington, 2007 Heavy Snow Warnings in Idaho, 2007 Every heavy snow warning in 2007

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.