Alert archive / Nevada / Snow Advisories in 2007

Snow Advisory 22, NWS Reno, NV

December 17, 2007Washoe County, Nevada; Modoc County, California

NWS Reno, NV issued this snow advisory at Dec 17, 2007, 11:00 AM PST for Washoe County, Nevada; Modoc County, California. It took effect at Dec 17, 2007, 10:00 PM PST. It was in force for 12 hr.

The area

The counties it named.

The facts

Issued: Dec 17, 2007, 11:00 AM PST (19:00 UTC)
In effect from: Dec 17, 2007, 10:00 PM PST
Expired: Dec 18, 2007, 10:01 AM PST
In force: 12 hr
Issued by: NWS Reno, NV

Counties Modoc County, CA, Washoe County, NV

The radar

The Reno radar (KRGX), 165 km from the middle of the area, began a volume at 19:03 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

Reno, NV (KREV), launched 12:00Z, 7.0 hours before the alert went out and 242 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: 1218 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 74 m²/s²
0-3 km storm-relative helicity: 312 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 Reno, NV wrote its last area forecast discussion before this snow advisory went out at Dec 17, 10:50 AM PST, 10 minutes earlier.

Area forecast discussion, Dec 17, 10:50 AM PST, 10 minutes before

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The office that day

Everything else NWS Reno, NV issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 17, 4:51 AM PST	Winter Storm Warning	REV	Douglas, Washoe	41 hr
Dec 17, 3:40 PM PST	Winter Storm Watch	REV	Douglas, Washoe	37 hr

Nearby

Snow Advisories in Nevada, 2007 Snow Advisories in California, 2007 Every 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.