Alert archive / California / Snow Advisories in 2006

Snow Advisory 27, NWS Reno, NV

December 21, 20064 counties in California

NWS Reno, NV issued this snow advisory at Dec 21, 2006, 4:37 AM PST for 4 counties in California. It took effect at Dec 21, 2006, 2:00 PM PST. It was in force for 14 hr.

The area

The counties it named.

The facts

Issued: Dec 21, 2006, 4:37 AM PST (12:37 UTC)
In effect from: Dec 21, 2006, 2:00 PM PST
Expired: Dec 22, 2006, 4:14 AM PST
In force: 14 hr
Issued by: NWS Reno, NV

Counties Lassen County, CA, Mono County, CA, Plumas County, CA, Sierra County, CA

The radar

The Reno radar (KRGX), 68 km from the middle of the area, began a volume at 12:41 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

Medford/Jackson, OR (KMFR), launched 12:00Z, 0.6 hours before the alert went out and 382 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: 733 m above ground
0-6 km bulk shear: 65 kt
0-1 km storm-relative helicity: 297 m²/s²
0-3 km storm-relative helicity: 334 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 21, 3:30 AM PST, 1 hour 7 minutes earlier.

Area forecast discussion, Dec 21, 3:30 AM PST, 1 hour 7 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 21, 4:37 AM PST	Winter Storm Warning	REV	Douglas, Washoe	24 hr
Dec 21, 7:45 AM PST	Freezing Rain Advisory	REV	Lassen, Plumas, Sierra	6 hr

Nearby

Snow Advisories in California, 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.