Alert archive / Oregon / Snow Advisories in 2006

Snow Advisory 29, NWS Medford, OR

November 21, 20067 counties in Oregon; Modoc County, Siskiyou County, California

NWS Medford, OR issued this snow advisory at Nov 21, 2006, 4:31 AM PST for 7 counties in Oregon; Modoc County, Siskiyou County, California. It took effect at Nov 21, 2006, 7:00 AM PST. It was in force for 44 hr.

The area

The counties it named.

The facts

Issued: Nov 21, 2006, 4:31 AM PST (12:31 UTC)
In effect from: Nov 21, 2006, 7:00 AM PST
Expired: Nov 23, 2006, 3:14 AM PST
In force: 44 hr
Issued by: NWS Medford, OR

Counties Modoc County, CA, Siskiyou County, CA, Coos County, OR, Curry County, OR, Douglas County, OR, Jackson County, OR, Josephine County, OR, Klamath County, OR, Lake County, OR

The radar

The Medford radar (KMAX), 47 km from the middle of the area, began a volume at 12:34 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, 0.5 hours before the alert went out and 489 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: 3006 m above ground
0-6 km bulk shear: 77 kt
0-1 km storm-relative helicity: 221 m²/s²
0-3 km storm-relative helicity: 375 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 Medford, OR wrote its last area forecast discussion before this snow advisory went out at Nov 21, 3:53 AM PST, 38 minutes earlier.

Area forecast discussion, Nov 21, 3:53 AM PST, 38 minutes before

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The office that day

Everything else NWS Medford, OR issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Nov 20, 8:49 PM PST	High Wind Warning	MFR	Coos, Curry, Douglas	13 hr
Nov 21, 4:06 AM PST	High Surf Advisory	MFR	Coos, Curry, Douglas	5 hr
Nov 21, 4:31 AM PST	Winter Storm Watch	MFR	Siskiyou	7 hr

Nearby

Snow Advisories in Oregon, 2006 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.