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Shaded-relief map of Cobb, California: rivers, roads, the city limits and where the water drains.
CALIFORNIA · LAKE COUNTY

Cobb

1,295 people, 2,710 ft above sea level in Lake County.

2,710 ftElevation, city center
1,295People, 2024 estimate
5 sq miLand area
Sunny 59°
Sunny now Dew point 49° · SSE 7 mph · high 61°
City of Cobb River Interstate 2 miles
Explore the plate Order a print

The Cobb plate. Relief from Copernicus GLO-30; rivers and lakes from USGS NHD; watersheds from the USGS Watershed Boundary Dataset; roads and city limits from Census TIGER 2024.

MILE1
TODAY

Today in Cobb

NWS forecast and National Blend of Models · updated 2:00 PM PST
RIGHT NOW Ukiah Municipal Airport (KUKI) · 1:56 PM
Sunny
59° Sunny Feels like 59° · high of 61° near 2 PM
WindSSE 7 mphno gusts
Humidity69%falling to 58% this afternoon
Pressure29.95 in →steady
Visibility10 mihaze-free
CloudsClear
UV index—no forecast
Dew point 49° · Dry34° by Tuesday: drier air arrives
DryComfortableStickyMuggyOppressive
NEXT RAIN
Mostly cloudy
Tomorrow, about 3 AMin about 12 hours · 99% chance · rain
LIKELY AMOUNT—amounts come within 3 days
LAST RAINNov. 30.12 in · 11 dry days
ALERTS & OUTLOOKS
No watches or warnings for Lake County
NWS Eureka and the Storm Prediction Center · checked 2:45 PM
SUN & MOON
↑ 6:52 AM4:58 PM ↓
10 h 6 m of daylight, 2 minutes less than yesterday
Waxing crescent, 26% lit. Next full moon: Nov. 24.
AIR & POLLEN
39
GOODAir quality index · fine particles
No pollen source yet.

The next three days, hour by hour

Sky: clear, cloudy, night Rain likely National Blend of Models
SATURDAY, NOV. 14
SUNDAY, NOV. 15
MONDAY, NOV. 16
TUESDAY, NOV. 17
2p
5p
8p
11p
2a
5a
8a
11a
2p
5p
8p
11p
2a
5a
8a
11a
2p
5p
8p
11p
2a
5a
8a
11a
mostly cloudy day
mostly cloudy night
mostly cloudy night
overcast
rain
rain
rain
rain
rain
partly cloudy night
partly cloudy night
partly cloudy night
partly cloudy night
partly cloudy night
partly cloudy day
mostly sunny
mostly sunny
mostly clear night
mostly clear night
mostly clear night
mostly clear night
mostly clear night
mostly sunny
mostly sunny
TEMPERATURE °F
61°
48°
58°
40°
57°
34°
CHANCE OF RAIN
99% · 0.89 in Sunday morning 50%
WIND, MPH
7
5
9
12
10
10
5
0
0
0
0
0
0
0
0
3
5
2
0
0
0
0
0
2
HOW IT FEELS · DEW POINT
Dry: dew points 34 to 51°

The next seven days, and how sure we are

Forecast, with the range 8 in 10 ensemble members agree on Normal, about 65° / 40°
SAT Nov. 14 Mostly cloudy Mostly cloudy
61° 44°
0% rain — SSE 7 A
SUN Nov. 15 Showers likely Showers likely
58° 39°
100% rain 1.4–1.9″ S 3 B
MON Nov. 16 Partly cloudy Partly cloudy
59° 33°
20% rain — WNW 3 B
TUE Nov. 17 Showers likely Showers likely
58° 40°
100% rain 0.6–1.5″ S 6 B
WED Nov. 18 Showers likely Showers likely
54° 38°
100% rain 1.2–2.6″ SSE 7 B
THU Nov. 19 Showers likely Showers likely
56° 34°
70% rain up to 1.0″ N 5 B
FRI Nov. 20 Partly cloudy Partly cloudy
60° 36°
20% rain — SW 5 B
How sure are we? AModels agree: highs within 4° BSome spread: within 8° CWide spread: check back
Range from the National Blend of Models percentiles · graded on Forecast Scores
AIR MAIL

Where today’s air came from

The air arriving over Cobb about 5,000 feet above the ground was over the Mojave Desert three days ago, and over the California coast a day ago, about 590 miles back along its path. It has stayed over land, which is why it feels dry. Traced back 72 hours through NOAA’s hourly RAP analyses, nine paths at each of three heights.

MILE2
THE GROUND

What Cobb stands on

Cobb’s center stands about 2,710 ft above sea level. Within three miles the land runs from 1,840 ft to 4,520 ft, a difference of 2,680 ft: mountain country. The highest named summit within 15 miles is Cobb Mountain, about 4,730 ft, 1 miles southwest.

Under the town center the state geologic map shows Franciscan Complex, unit 1 (Coast Ranges) (sandstone, mudstone), from the Jurassic to Cretaceous, 66 to 202 million years old.

The section below crosses 14 rock units mapped at the surface.

Cobb, cut in half from southwest to northeast

A section southwest to northeast, 24 miles through the town center
0 ft2,000 ft4,000 ft COBB2,710 ftRussian Riverabout 190 ftPerini Hill2,500 ftLower Lake1,370 ft ← SW · GeyservilleNE →

Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 4×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.

Rock at the surface along the line

Quaternary volcanic flow rocks, unit 3 (Clear Lake Volcanic Field)

Andesite. Age: Early Pliocene to Pleistocene, 1.5 to 4 million years old. About 7 mi of the line.

Franciscan melange

Melange. Age: Jurassic to Cretaceous, 66 to 202 million years old. About 3 mi of the line.

Franciscan Complex, unit 1 (Coast Ranges)

Sandstone, mudstone. Age: Jurassic to Cretaceous, 66 to 202 million years old. About 2 mi of the line.

Upper Cretaceous marine rocks, unit 1 (Upper Great Valley Sequence)

Sandstone, siltstone-mudstone. Age: Late Cretaceous, 66 to 100 million years old. About 2 mi of the line.

Mesozoic volcanic rocks, unit 1 (Coast Ranges)

Greenstone. Age: Jurassic to Cretaceous, 66 to 202 million years old. About 2 mi of the line.

Jurassic marine rocks, unit 2 (Coast Ranges)

Siltstone-mudstone. Age: Late Jurassic to Early Cretaceous, 100 to 164 million years old. About 2 mi of the line.

From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale. 8 smaller units along the line are not listed.

Heights from Copernicus GLO-90 (a surface model: it includes buildings and tree canopy); summits from USGS GNIS; rivers from USGS NHDPlus HR; rock from the USGS State Geologic Map Compilation.
MILE3
THE WATER

Where Cobb’s rain goes

A raindrop that lands in Cobb reaches San Francisco Bay and the Pacific Ocean by way of Kelsey Creek, Cache Creek, Prospect Slough, Cache Slough and the Sacramento: about 170 river miles.

THE WAY DOWN, TO SCALE
Cobb≈ 170 mi · San Francisco Bay and the Pacific Ocean
FROM THE CENTER OF COBB ≈ 170 mi to San Francisco Bay and the Pacific Ocean Kelsey Creek → Cache Creek → Prospect Slough → Cache Slough → Sacramento

Lake on the way: Clear Lake.

120 miles of the trip are on Cache Creek.

Traced down the USGS NHDPlus V2.1 river network from the Census center point of Cobb; river miles along the main stem, rounded.

MILE7
ON THE NETWORK

Around Cobb on the Forecast Network

Neighboring plates

Santa Rosa CA · 27 MI 27 miles south Rohnert Park CA · 34 MI 34 miles south Sacramento CA · 70 MI 70 miles east San Francisco CA · 78 MI 78 miles south Oakland CA · 78 MI 78 miles south San Jose CA · 117 MI 117 miles southeast
FORECASTCITY
Map of Cobb, California. Explore the plate
CALIFORNIA · LAKE

Cobb

1,295 people, 2,710 ft above sea level in Lake County.

2,710 ftElevation
1,295People
5 sq miLand
Sunny 59°
SunnyDew point 49°
1

Today in Cobb

NEXT 15 HOURS
Now mostly cloudy day 61° 0%
5p mostly cloudy night 58° 1%
8p mostly cloudy night 55° 1%
11p overcast 52° 4%
2a mostly cloudy night 50° 25%
5a rain 48° 56%
Mostly cloudy
NEXT RAINTomorrow about 3 AM · 99%
→
Sat0%
Mostly cloudy Mostly cloudy
44
61
A
Sun100%
Showers likely Showers likely
39
58
B
Mon20%
Partly cloudy Partly cloudy
33
59
B
Tue100%
Showers likely Showers likely
40
58
B
Wed100%
Showers likely Showers likely
38
54
B
Thu70%
Showers likely Showers likely
34
56
B
Fri20%
Partly cloudy Partly cloudy
36
60
B
Letters show how sure the forecast is: A, models agree; B, some spread; C, check back. Sample data.
2

What Cobb stands on

Cobb’s center stands about 2,710 ft above sea level. Within three miles the land runs from 1,840 ft to 4,520 ft, a difference of 2,680 ft: mountain country. The highest named summit within 15 miles is Cobb Mountain, about 4,730 ft, 1 miles southwest.

Cobb, southwest to northeast Cobb2,710 ftRussian Riverabout 190 ftPerini Hill2,500 ft ← SWNE → 24 miles through the town center; vertical exaggeration about 8×. Colors: rock at the surface.
Elevation, center2,710 ft
Within 3 miles1,840 to 4,520 ft
Lie of the landMountainous (2,680 ft of relief)
High point nearbyCobb Mountain, 4,730 ft, 1 mi southwest
Rock at the surfaceFranciscan Complex, unit 1 (Coast Ranges)
Its ageJurassic to Cretaceous, 66 to 202 million years old
3

Where the rain goes

≈ 170 mito the PacificKelsey Creek → Cache Creek → Prospect Slough → Cache Slough → Sacramento

A raindrop that lands in Cobb reaches San Francisco Bay and the Pacific Ocean by way of Kelsey Creek, Cache Creek, Prospect Slough, Cache Slough and the Sacramento: about 170 river miles.

Lake on the way: Clear Lake.

120 miles of the trip are on Cache Creek.