California, 2014

Flash Flooding in California, December 6, 2014

December 6, 2014 · NWS STO · 4 events in 1 county or zone

Heavy rains from a nearly stationary precipitation band brought flash flooding to Tehama County. Local creeks over topped their banks and levees, causing damage to homes.

Where it happened

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  • 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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The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
4

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.

What happened

The episode as NWS STO wrote it up.

Heavy rains from a nearly stationary precipitation band brought flash flooding to Tehama County. Local creeks over topped their banks and levees, causing damage to homes.

What forecasters said that day

The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Sacramento, CA wrote its last area forecast discussion before the first event at Dec 5, 10:14 PM PST, 2 hours 46 minutes earlier.

Area forecast discussion, Dec 5, 10:14 PM PST, 2 hours 46 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SACRAMENTO CA
1014 PM PST Fri Dec 5 2014

.Synopsis...
Pacific frontal system will bring rain and high elevation snow
this afternoon into Saturday. The next system moves through Sunday
afternoon into Monday bringing precipitation...mainly north of
Interstate 80. A windy and more moist system moves in Thursday.

&&

.Discussion... Bands the showers continue to track across NorCal
this evening with the best coverage over the northern and central
Sac valley. The heaviest rainfall amounts have been over northwest
Shasta county where several RAWS sites have received around 1.50
inches. Activity will continue overnight...but gradually diminish
towards morning. Winds have also been gusty over the north Sac
valley with Redding gusting to 32 kts. The winds will diminish
over the next couple of hours as frontal system passes to the
east. Snow levels remain high currently above 7000 feet. forecast
is on track and no evening update will be needed.

.Previous Discussion...
Scattered showers this afternoon...mainly north of Interstate 80
with moisture and instability and warm air advection ahead of the
system coming in tonight into Saturday. Temperatures have warmed
up in the 60s in the Valley and Delta areas this afternoon and in
the mid 30s to 40s in the mountains. These temperatures are near
to several degrees above normal. The records are a little higher
than yesterday with a records in the low 70s in the Sacramento and
Stockton areas.

Precipitation will become more widespread this evening ahead of
the cold front. This may bring slick roads for the evening
commute. Thunderstorms are possible this evening with some
instability. Southerly winds will also increase ahead of the
front bringing breezy conditions late this afternoon into tonight.
The winds will blow down leaves that can clog drains.
Precipitation may continue into Saturday morning with lingering
showers possible over the mountains in the afternoon. Snow levels
around 7000 ft with a few inches possible over the highest
elevations and several inches over the top of Mt. Lassen.
Precipitation amounts into Saturday are forecast to be around a
half an inch in the Sacramento Valley and a quarter of an inch or
less in the Northern San Joaquin Valley and generally around a
half an inch to 1.5 inches over the foothills and mountains with
the highest amounts expected in Butte and Western Plumas Counties
and Shasta County. Weak ridging between systems late Saturday into
early Sunday for a break in precipitation most locations except
possibly along the Coastal range and western Shasta County. Areas
of Valley fog may develop on Sunday morning with lingering
moisture. Another system moves into the area Sunday afternoon into
Monday with the majority of the precipitation along and north of
the Interstate 80 corridor. Precipitation amounts generally a
quarter of an inch or less in the Sacramento Valley and around an
inch in the mountains.

.Extended Discussion (Tuesday through Friday)

Relatively dry weather for start of extended period as more zonal
flow arrives. A shortwave moving into the Pac NW will bring a
small chance for some showers across northern portions of the area
Tuesday into Wednesday but most areas will remain dry. The next
storm system will arrive late week (Thu/Fri time frame) as large
low rotates SE toward the coast. As advertised previously, this
system has the potential to be strong with numerous impacts. GEFS
mean MSLP showing min percentile with PWATs around 1 inch in the 99th
percentile. Timing and details still uncertain this far out with
a bit of model disagreement. It will definitely be one to watch
with the possibility of moderate-heavy precip, lower snow levels
than this past storm, and gusty winds. CEO

&&

.Aviation...

VFR/MVFR conditions with locally reduced ceilings/vis into
Saturday morning as showers move through. gradually improving
conditions through the day on Saturday.

Southeast winds up to 25 kt will decrease to 10-15 kt towards
morning.

&&

.STO Watches/Warnings/Advisories...
None.
&&

The radar

The Beale AFB radar (KBBX), 96 km away, was scanning. The volume nearest the first event began at 08:59 UTC.

Open the radar archive at this moment

Event by event

4 flash flood. Local standard time, as filed.

Flash Flood, Tehama

When
December 6, 1:00 AM PST to 6:00 AM PST
Where
Tehama County, 2.61 mi NW of Red Bluff to 2.42 mi S of Blunt
Cause
Heavy Rain
Reported by
Department of Highways
Coordinates
40.210, -122.260

Flash flooding caused a hard closure of Highway 36 at Baker Road.

Flash Flood, Tehama

When
December 6, 1:00 AM PST to 6:00 AM PST
Where
Tehama County, 2.22 mi WNW of Red Bluff to 2.52 mi WNW of Red Bluff
Cause
Heavy Rain
Reported by
Department of Highways
Coordinates
40.190, -122.270

Mudslide reported near the intersection of Baker Rd. and Monrovia.

Flash Flood, Tehama

When
December 6, 1:00 AM PST to 6:00 AM PST
Where
Tehama County, 1.05 mi E of Blunt to 1.3 mi E of Blunt
Cause
Heavy Rain
Reported by
Department of Highways
Coordinates
40.250, -122.250

Flooding reported at intersection of Jellys Ferry Dr. and Oakwood.

Flash Flood, Tehama

When
December 6, 1:10 AM PST to 6:00 AM PST
Where
Tehama County, 0.87 mi SW of Red Bluff to 1.7 mi SSE of Red Bluff
Cause
Heavy Rain
Reported by
Law Enforcement
Coordinates
40.170, -122.240

Tehama County Sheriff's Office reported flooding of roads at multiple locations. Received a report of up to 6 feet of water flowing over a road. Closed a stretch of Highway 36.

What these are

Flash Flood
Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in California in 2014Every state in 2014This day in weather historyWarnings in California, December 2014

Sources

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 2026-09-24. Each event’s entry at NCEI: 550033, 550046, 550049, 550036.