California, 2009Extreme Cold in California, December 5 to 11, 2009
December 5 to 11, 2009 · NWS MFR · 6 events in 6 counties and zones
A frigid Arctic air mass moved into Oregon December 5th and remained over the area through December 12th, when it finally abated as a Pacific system approached the area.
Every event with a place to put it; 6 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
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- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 6
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
A frigid Arctic air mass moved into Oregon December 5th and remained over the area through December 12th, when it finally abated as a Pacific system approached the area.
Extreme Cold/Wind Chill, Central Siskiyou County
- When
- December 5, 6:00 PM PST to December 11, 10:00 AM PST
- Where
- Central Siskiyou County forecast zone
- Reported by
- Official NWS Observations
- Coordinates
- 41.593, -122.540 (the zone’s center; the record gives no point)
Low temperatures in this zone during this interval were generally in the teens. On the coldest nights...the 9th and the 10th, the coldest stations dipped into the single digits. |Temperatures warmed on the 11th but remained well below normal...and became more seasonable on the 12th. Numerous broken pipes and other cold-related damage was reported during this interval.
Extreme Cold/Wind Chill, Western Siskiyou County
- When
- December 5, 6:00 PM PST to December 11, 10:00 AM PST
- Where
- Western Siskiyou County forecast zone
- Reported by
- Official NWS Observations
- Coordinates
- 41.593, -122.540 (the zone’s center; the record gives no point)
Low temperatures in this zone during this interval were generally in the teens. On the coldest nights...the 9th and the 10th, the coldest stations dipped into the single digits. |Temperatures warmed on the 11th but remained well below normal...and became more seasonable on the 12th. Numerous broken pipes and other cold-related damage was reported during this interval.
Extreme Cold/Wind Chill, South Central Siskiyou County
- When
- December 5, 6:00 PM PST to December 11, 10:00 AM PST
- Where
- South Central Siskiyou County forecast zone
- Reported by
- Official NWS Observations
- Coordinates
- 41.593, -122.540 (the zone’s center; the record gives no point)
Low temperatures in this zone during this interval were generally in the teens. On the coldest nights...the 9th and the 10th, the coldest stations dipped into the single digits. |Temperatures warmed on the 11th but remained well below normal...and became more seasonable on the 12th. Numerous broken pipes and other cold-related damage was reported during this interval.
Extreme Cold/Wind Chill, North Central & Southeast Siskiyou County
- When
- December 5, 6:00 PM PST to December 11, 10:00 AM PST
- Where
- North Central & Southeast Siskiyou County forecast zone
- Reported by
- Official NWS Observations
- Coordinates
- 41.593, -122.540 (the zone’s center; the record gives no point)
Low temperatures in this zone during this interval were generally in the single digits above zero. On the coldest nights...the 8th through the 10th, the coldest stations dipped below zero. The coldest stations had lows ranging from 6 to 11 degrees below zero. Temperatures warmed on the 11th but remained well below normal...and became more seasonable on the 12th. Numerous broken pipes and other cold-related damage was reported during this interval.
Extreme Cold/Wind Chill, Northeast Siskiyou and Northwest Modoc Counties
- When
- December 5, 6:00 PM PST to December 11, 10:00 AM PST
- Where
- Northeast Siskiyou and Northwest Modoc Counties forecast zone
- Reported by
- Official NWS Observations
- Coordinates
- 41.592, -121.632 (the zone’s center; the record gives no point)
Low temperatures in this zone during this interval were generally in the single digits above zero. On the coldest nights...the 8th through the 10th, the coldest stations dipped below zero. The coldest stations had lows ranging from 6 to 11 degrees below zero. Temperatures warmed on the 11th but remained well below normal...and became more seasonable on the 12th. Numerous broken pipes and other cold-related damage was reported during this interval.
Extreme Cold/Wind Chill, Modoc County
- When
- December 5, 6:00 PM PST to December 11, 10:00 AM PST
- Where
- Modoc County forecast zone
- Reported by
- Official NWS Observations
- Coordinates
- 41.590, -120.725 (the zone’s center; the record gives no point)
Low temperatures in this zone during this interval were generally in the single digits above zero. On the coldest nights...the 8th through the 10th, the coldest stations dipped below zero. The coldest stations had lows ranging from 6 to 12 degrees below zero. Temperatures warmed on the 11th but remained well below normal...and became more seasonable on the 12th. Numerous broken pipes and other cold-related damage was reported during this interval.
- Extreme Cold/Wind Chill
- Temperatures or wind chills at or below the local warning criteria, or cold that caused deaths.
After NWS Directive 10-1605, the rules offices file Storm Data by.
- Dense Fog in California, December 5, 200916 injured · $700,000 · 1 event
- Winter Weather in Kentucky, December 5, 20091 death · $15,000 · 1 event
- Extreme Cold in Oregon, December 5 to 11, 20091 death · 9 events
- Winter Weather in Tennessee, December 5, 20094 injured · 16 events
- Winter Weather in Tennessee, December 5, 20094 injured · 2 events
- Heavy Snow and Winter Weather in Kentucky, December 5, 200934 events
- Winter Storm and Winter Weather in Virginia, December 5, 200918 events
- Winter Storm and Winter Weather in Maryland, December 5, 200914 events
- Winter Storm and Winter Weather in West Virginia, December 5, 200910 events
- Winter Weather in Pennsylvania, December 5, 20098 events
- Heavy Snow and Winter Weather in New Jersey, December 5, 20098 events
- Extreme Cold in Montana, December 5 to 7, 20096 events
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-10-01. Each event’s entry at NCEI: 198969, 198970, 198971, 198974, 198975, 198976.