Alert archive / Washington / Snow Advisories in 2007

Snow Advisory 19, NWS Spokane, WA

November 18, 20075 counties in Washington; Kootenai County, Lewis County, Nez Perce County, Idaho

NWS Spokane, WA issued this snow advisory at Nov 18, 2007, 4:07 AM PST for 5 counties in Washington; Kootenai County, Lewis County, Nez Perce County, Idaho. It took effect at Nov 18, 2007, 3:22 PM PST. It was in force for 36 hr.

The area

The counties it named.

The facts

Issued
Nov 18, 2007, 4:07 AM PST (12:07 UTC)
In effect from
Nov 18, 2007, 3:22 PM PST
Expired
Nov 20, 2007, 3:47 AM PST
In force
36 hr
Issued by
NWS Spokane, WA

Counties Kootenai County, ID, Lewis County, ID, Nez Perce County, ID, Asotin County, WA, Garfield County, WA, Lincoln County, WA, Spokane County, WA, Whitman County, WA

The radar

The Spokane radar (KOTX), 95 km from the middle of the area, began a volume at 12:09 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, 0.1 hours before the alert went out and 112 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 2007-11-18Temperature 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 2007-11-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -12 square meters per square second.1939587897117136156175Sfc1 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
1734 m above ground
0-6 km bulk shear
75 kt
0-1 km storm-relative helicity
-12 m²/s²
0-3 km storm-relative helicity
17 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Nov 18, 4:07 AM PSTHeavy Snow WarningOTXBenewah, Kootenai, Latah, Lewis, Nez Perce, Shoshone35 hr

Nearby

Snow Advisories in Washington, 2007Snow Advisories in Idaho, 2007Every snow advisory 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.