An Arctic cold front combined with Pacific moisture to produce widespread heavy snowfall and very cold temperatures.  Snowfall amounts in inches included 2 miles west of The Dalles (5), 3 miles southwest of Lyle (5), Moro (5.5), 11 miles south southeast of Celilo (4), 2 miles north of Hermiston (5), Irrigon (6), Imbler (5), Elgin (5), 21 miles east southeast of Joseph (9), 5 miles east northeast of Troy (12), 15 miles southeast of Heppner (18), 7 miles south southeast of Fox (12), 5 miles north northwest of Service Creek (4), 10 miles northwest of Monument (12), Seneca (6), 7 miles east southeast of John Day (8), Helix (7), Weston (8), Condon (6), 5 miles west northwest of Ruggs (4.5), Heppner (5), 2 miles south southwest of Camp Sherman (17), 5 miles north northwest of LaPine (12), 5 miles south southwest of Bend (8.5), 4 miles south southwest of Bend (9), and 9 miles west of La Pine.
Extreme cold temperatures followed the snowfall with many locations setting records  on November 24th including Joseph (-9), Long Creek (-10), Meacham (-24), Pendleton (-7).  Other sub zero temperatures were observed at Bend (-8), Hermiston (-8), Joseph (-11), LaGrande (-6), Redmond (-8), Antelope (-5), Condon (-2), Moro (-7), Mitchell (-1), Seneca (-19), and Union (-8).

Heavy Snow in OCHOCO-JOHN DAY HIGHLANDS, OREGON
From 21-NOV-10 11:00:00 to 22-NOV-10 20:00:00 (PST-8)
Reported by: Amateur Radio

Heavy Snow in SOUTHERN BLUE MOUNTAINS, OREGON
From 21-NOV-10 11:00:00 to 23-NOV-10 01:00:00 (PST-8)
Reported by: Trained Spotter

Heavy Snow in WALLOWA COUNTY, OREGON
From 22-NOV-10 19:00:00 to 23-NOV-10 05:00:00 (PST-8)
Reported by: Trained Spotter

Extreme Cold/Wind Chill in EAST SLOPES OF THE OREGON CASCADES, OREGON
From 23-NOV-10 18:00:00 to 24-NOV-10 12:00:00 (PST-8)
Reported by: COOP Observer

Heavy Snow in NORTH CENTRAL OREGON, OREGON
From 22-NOV-10 14:00:00 to 23-NOV-10 06:00:00 (PST-8)
Reported by: Trained Spotter

Heavy Snow in NORTHERN BLUE MOUNTAINS, OREGON
From 21-NOV-10 14:00:00 to 23-NOV-10 11:00:00 (PST-8)
Reported by: Mesonet

Heavy Snow in JOHN DAY BASIN, OREGON
From 21-NOV-10 23:00:00 to 23-NOV-10 05:00:00 (PST-8)
Reported by: Trained Spotter

Heavy Snow in LOWER COLUMBIA BASIN, OREGON
From 22-NOV-10 10:00:00 to 23-NOV-10 06:00:00 (PST-8)
Reported by: Trained Spotter

Extreme Cold/Wind Chill in OCHOCO-JOHN DAY HIGHLANDS, OREGON
From 23-NOV-10 18:00:00 to 24-NOV-10 12:00:00 (PST-8)
Reported by: COOP Observer

Extreme Cold/Wind Chill in WALLOWA COUNTY, OREGON
From 23-NOV-10 18:00:00 to 24-NOV-10 12:00:00 (PST-8)
Reported by: AWOS

Heavy Snow in FOOTHILLS OF THE NORTHERN BLUE MOUNTAINS OF OREGON, OREGON
From 21-NOV-10 11:00:00 to 23-NOV-10 12:00:00 (PST-8)
Reported by: Trained Spotter

Heavy Snow in FOOTHILLS OF THE SOUTHERN BLUE MOUNTAINS OF OREGON, OREGON
From 21-NOV-10 11:00:00 to 23-NOV-10 12:00:00 (PST-8)
Reported by: Trained Spotter

Heavy Snow in GRAND RONDE VALLEY, OREGON
From 22-NOV-10 07:15:00 to 23-NOV-10 06:00:00 (PST-8)
Reported by: Trained Spotter

Extreme Cold/Wind Chill in NORTHERN BLUE MOUNTAINS, OREGON
From 23-NOV-10 18:00:00 to 24-NOV-10 12:00:00 (PST-8)
Reported by: ASOS

Extreme Cold/Wind Chill in SOUTHERN BLUE MOUNTAINS, OREGON
From 23-NOV-10 18:00:00 to 24-NOV-10 12:00:00 (PST-8)
Reported by: Mesonet

Extreme Cold/Wind Chill in GRAND RONDE VALLEY, OREGON
From 23-NOV-10 18:00:00 to 24-NOV-10 12:00:00 (PST-8)
Reported by: COOP Observer

Extreme Cold/Wind Chill in LOWER COLUMBIA BASIN, OREGON
From 23-NOV-10 18:00:00 to 24-NOV-10 12:00:00 (PST-8)
Reported by: COOP Observer

Extreme Cold/Wind Chill in NORTH CENTRAL OREGON, OREGON
From 23-NOV-10 18:00:00 to 24-NOV-10 12:00:00 (PST-8)
Reported by: COOP Observer

Heavy Snow in EASTERN COLUMBIA RIVER GORGE, OREGON
From 22-NOV-10 20:00:00 to 23-NOV-10 11:00:00 (PST-8)
Reported by: Trained Spotter

Heavy Snow in EAST SLOPES OF THE OREGON CASCADES, OREGON
From 21-NOV-10 16:30:00 to 23-NOV-10 05:00:00 (PST-8)
Reported by: Trained Spotter

Extreme Cold/Wind Chill in FOOTHILLS OF THE NORTHERN BLUE MOUNTAINS OF OREGON, OREGON
From 23-NOV-10 18:00:00 to 24-NOV-10 12:00:00 (PST-8)
Reported by: COOP Observer

Extreme Cold/Wind Chill in FOOTHILLS OF THE SOUTHERN BLUE MOUNTAINS OF OREGON, OREGON
From 23-NOV-10 18:00:00 to 24-NOV-10 12:00:00 (PST-8)
Reported by: COOP Observer