Mad River near Arcata
4.7 mi- Level
- 5.7 ft
- Flow
- 55 cfs
Forecast peak 5.7 ft Tue 2 AM
Reading from Sat 5:45 AM · NWS gauge page
Appearance
Ends in 1 h 35 min
Issued for this forecast zone · National Weather Service Eureka CA
What
Temperatures as low as 35 will result in frost formation.
Impacts
Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.
Precautionary actions
Take steps now to protect tender plants from the cold.
Areas: Coastal Del Norte; Northern Coastal Humboldt
See it on weather.gov (opens in a new tab)Observed 7:00 AM PDT at KACV
Clear and 37°3°.
Today: low 40°4° (likely 40°4° to 45°7°), high 62°17° (likely 60°16° to 65°18°).
Now 37°3°
Clear
No precipitation expected in the next 2 hours.
From forecast models
| Hour | Conditions | Temperature | Feels like | Precipitation | Wind | Humidity | Cloud cover | UV index |
|---|---|---|---|---|---|---|---|---|
| Sat 7a | Clear | 38°3° (likely 38°3° to 49°9°) | 33°1° | 0% | 6 mph10 km/h from E, gusts 5 mph8 km/h | 64% | 3% | 0 |
| Sat 8a | Sunny | 38°3° (likely 38°3° to 48°9°) | 35°2° | 0% | 0 mph0 km/h, gusts 5 mph8 km/h | 64% | 6% | 0 |
| Sat 9a | Mostly sunny | 41°5° (likely 41°5° to 49°9°) | 39°4° | 0% | 0 mph0 km/h, gusts 5 mph8 km/h | 61% | 18% | 1 |
| Sat 10a | Sunny | 49°9° (likely 49°9° to 57°14°) | 48°9° | 0% | 0 mph0 km/h, gusts 5 mph9 km/h | 56% | 5% | 2 |
| Sat 11a | Sunny | 54°12° (likely 54°12° to 63°17°) | 54°12° | 0% | 2 mph3 km/h from W, gusts 4 mph6 km/h | 50% | 3% | 3 |
| Sat 12p | Sunny | 57°14° (likely 57°14° to 65°18°) | 57°14° | 0% | 2 mph3 km/h from W, gusts 4 mph6 km/h | 50% | 4% | 4 |
| Sat 1p | Sunny | 59°15° (likely 59°15° to 65°18°) | 59°15° | 0% | 2 mph3 km/h from W, gusts 5 mph8 km/h | 50% | 33% | 4 |
| Sat 2p | Sunny | 61°16° (likely 60°16° to 65°18°) | 61°16° | 0% | 3 mph5 km/h from SW, gusts 6 mph9 km/h | 51% | 42% | 4 |
| Sat 3p | Sunny | 60°16° (likely 59°15° to 64°18°) | 60°16° | 0% | 3 mph5 km/h from SW, gusts 6 mph10 km/h | 51% | 41% | 4 |
| Sat 4p | Sunny | 61°16° (likely 58°14° to 62°17°) | 61°16° | 0% | 3 mph5 km/h from SW, gusts 6 mph10 km/h | 53% | 40% | 3 |
| Sat 5p | Sunny | 58°14° (likely 56°13° to 60°16°) | 58°14° | 0% | 2 mph3 km/h from S, gusts 5 mph8 km/h | 60% | 38% | 1 |
| Sat 6p | Clear | 55°13° (likely 52°11° to 56°13°) | 55°13° | 0% | 2 mph3 km/h from S, gusts 3 mph5 km/h | 69% | 40% | 1 |
| Sat 7p | Clear | 53°12° (likely 49°9° to 53°12°) | 53°12° | 0% | 2 mph3 km/h from S, gusts 3 mph4 km/h | 77% | 41% | 0 |
| Sat 8p | Clear | 48°9° (likely 47°8° to 50°10°) | 48°9° | 0% | 3 mph5 km/h from SSE, gusts 3 mph5 km/h | 81% | 40% | 0 |
| Sat 9p | Mostly cloudy | 47°8° (likely 46°8° to 48°9°) | 47°8° | 0% | 3 mph5 km/h from SSE, gusts 4 mph6 km/h | 81% | 49% | 0 |
| Sat 10p | Mostly cloudy | 46°8° (likely 45°7° to 47°8°) | 46°8° | 0% | 3 mph5 km/h from SSE, gusts 5 mph7 km/h | 82% | 67% | 0 |
| Sat 11p | Mostly cloudy | 45°7° (likely 44°7° to 47°8°) | 45°7° | 0% | 9 mph14 km/h from ESE, gusts 4 mph6 km/h | 82% | 73% | 0 |
| Sun 12a | Mostly cloudy | 45°7° (likely 44°7° to 46°8°) | 45°7° | 0% | 9 mph14 km/h from ESE, gusts 4 mph6 km/h | 80% | 77% | 0 |
| Sun 1a | Cloudy | 44°7° (likely 44°7° to 46°8°) | 44°7° | 0% | 9 mph14 km/h from ESE, gusts 4 mph6 km/h | 81% | 77% | 0 |
| Sun 2a | Cloudy | 43°6° (likely 43°6° to 46°8°) | 43°6° | 0% | 1 mph2 km/h from E, gusts 4 mph6 km/h | 79% | 79% | 0 |
| Sun 3a | Cloudy | 42°6° (likely 42°6° to 46°8°) | 42°6° | 0% | 1 mph2 km/h from E, gusts 4 mph6 km/h | 77% | 75% | 0 |
| Sun 4a | Mostly cloudy | 42°6° (likely 42°6° to 46°8°) | 42°6° | 0% | 1 mph2 km/h from E, gusts 3 mph4 km/h | 76% | 65% | 0 |
| Sun 5a | Partly cloudy | 42°6° (likely 42°6° to 46°8°) | 42°6° | 0% | 1 mph2 km/h from E, gusts 2 mph4 km/h | 76% | 60% | 0 |
| Sun 6a | Partly cloudy | 41°5° (likely 41°5° to 45°7°) | 41°5° | 0% | 1 mph2 km/h from E, gusts 3 mph4 km/h | 76% | 61% | 0 |
| Sun 7a | Partly cloudy | 40°4° (likely 40°4° to 45°7°) | 40°4° | 0% | 1 mph2 km/h from E, gusts 2 mph4 km/h | 77% | 63% | 0 |
| Sun 8a | Cloudy | 41°5° (likely 41°5° to 45°7°) | 41°5° | 0% | 1 mph2 km/h from E, gusts 3 mph5 km/h | 78% | 65% | 0 |
| Sun 9a | Partly sunny | 44°7° (likely 44°7° to 48°9°) | 44°7° | 0% | 1 mph2 km/h from E, gusts 4 mph7 km/h | 74% | 77% | 0 |
| Sun 10a | Cloudy | 48°9° (likely 48°9° to 55°13°) | 48°9° | 0% | 1 mph2 km/h from E, gusts 4 mph6 km/h | 69% | 87% | 1 |
| Sun 11a | Cloudy | 52°11° (likely 52°11° to 57°14°) | 52°11° | 5% | 0 mph0 km/h, gusts 5 mph8 km/h | 64% | 90% | 2 |
| Sun 12p | Cloudy | 55°13° (likely 54°12° to 59°15°) | 55°13° | 5% | 0 mph0 km/h, gusts 5 mph8 km/h | 63% | 89% | 3 |
| Sun 1p | Cloudy | 56°13° (likely 54°12° to 59°15°) | 56°13° | 5% | 0 mph0 km/h, gusts 5 mph8 km/h | 63% | 98% | 4 |
| Sun 2p | Cloudy | 57°14° (likely 55°13° to 59°15°) | 57°14° | 5% | 2 mph3 km/h from WSW, gusts 5 mph8 km/h | 64% | 98% | 3 |
| Sun 3p | Cloudy | 58°14° (likely 55°13° to 59°15°) | 58°14° | 5% | 2 mph3 km/h from WSW, gusts 5 mph8 km/h | 65% | 90% | 3 |
| Sun 4p | Partly sunny | 57°14° (likely 56°13° to 58°14°) | 57°14° | 5% | 2 mph3 km/h from WSW, gusts 5 mph8 km/h | 68% | 45% | 2 |
| Sun 5p | Sunny | 56°13° (likely 55°13° to 57°14°) | 56°13° | 30%, 0.01 in0.3 mm | 1 mph2 km/h from WSW, gusts 6 mph10 km/h | 71% | 10% | 1 |
| Sun 6p | Mostly clear | 54°12° (likely 52°11° to 54°12°) | 54°12° | 30%, 0.01 in0.3 mm | 1 mph2 km/h from WSW, gusts 6 mph9 km/h | 76% | 22% | 0 |
| Sun 7p | Rain | 51°11° (likely 49°9° to 53°12°) | 51°11° | 30%, 0.01 in0.3 mm | 1 mph2 km/h from WSW, gusts 8 mph13 km/h | 82% | 61% | 0 |
| Sun 8p | Rain | 49°9° (likely 48°9° to 53°12°) | 49°9° | 30%, 0.01 in0.3 mm | 1 mph2 km/h from SSE, gusts 9 mph15 km/h | 87% | 53% | 0 |
| Sun 9p | Drizzle | 48°9° (likely 47°8° to 53°12°) | 48°9° | 30%, 0.01 in0.3 mm | 1 mph2 km/h from SSE, gusts 12 mph19 km/h | 89% | 55% | 0 |
| Sun 10p | Cloudy | 47°8° (likely 47°8° to 54°12°) | 47°8° | 30%, 0.01 in0.3 mm | 1 mph2 km/h from SSE, gusts 13 mph20 km/h | 89% | 76% | 0 |
| Sun 11p | Rain | 47°8° (likely 47°8° to 54°12°) | 46°8° | 70%, 0.11 in2.8 mm | 3 mph5 km/h from SSE, gusts 13 mph21 km/h | 88% | 98% | 0 |
| Mon 12a | Rain | 46°8° (likely 46°8° to 53°12°) | 45°7° | 70%, 0.11 in2.8 mm | 3 mph5 km/h from SSE, gusts 10 mph16 km/h | 88% | 98% | 0 |
| Mon 1a | Rain | 46°8° (likely 46°8° to 52°11°) | 44°7° | 70%, 0.11 in2.8 mm | 3 mph5 km/h from SSE, gusts 10 mph15 km/h | 88% | 92% | 0 |
| Mon 2a | Rain | 45°7° (likely 45°7° to 52°11°) | 45°7° | 70%, 0.11 in2.8 mm | 2 mph3 km/h from SSE, gusts 8 mph13 km/h | 88% | 89% | 0 |
| Mon 3a | Rain | 44°7° (likely 44°7° to 51°11°) | 44°7° | 70%, 0.11 in2.8 mm | 2 mph3 km/h from SSE, gusts 6 mph9 km/h | 88% | 90% | 0 |
| Mon 4a | Cloudy | 44°7° (likely 44°7° to 51°11°) | 44°7° | 70%, 0.11 in2.8 mm | 2 mph3 km/h from SSE, gusts 6 mph10 km/h | 89% | 93% | 0 |
| Mon 5a | Rain | 44°7° (likely 44°7° to 50°10°) | 44°7° | 60%, 0.02 in0.5 mm | 2 mph3 km/h from SE, gusts 7 mph12 km/h | 91% | 74% | 0 |
| Mon 6a | Drizzle | 43°6° (likely 43°6° to 51°11°) | 43°6° | 60%, 0.02 in0.5 mm | 2 mph3 km/h from SE, gusts 8 mph13 km/h | 93% | 89% | 0 |
Morning
6 AM–noon
Dry
Afternoon
noon–6 PM
Dry
Evening
6 PM–midnight
Dry
Overnight
midnight–6 AM
Dry
Official NWS forecast
Today: Mostly sunny. High near 62, with temperatures falling to around 58 in the afternoon. Southwest wind 0 to 6 mph.
Tonight: Mostly cloudy, with a low around 40. Southeast wind 1 to 9 mph.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
Morning
6 AM–noon
Dry
Afternoon
noon–6 PM
30% chance · 0.01 in0.3 mm
Evening
6 PM–midnight
70% chance · 0.16 in4.1 mm
Overnight
midnight–6 AM
70% chance · 0.57 in14 mm
Official NWS forecast
Day: A chance of rain after 5pm. Mostly sunny, with a high near 58. North wind around 2 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Night: Rain likely. Mostly cloudy, with a low around 42. South wind around 3 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
Morning
6 AM–noon
70% chance · 0.08 in2.1 mm
Afternoon
noon–6 PM
60% chance · 0.05 in1.3 mm
Evening
6 PM–midnight
20% chance
Overnight
midnight–6 AM
Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Rain likely. Partly sunny, with a high near 55. South southwest wind around 3 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
Night: A chance of rain before 5am. Mostly cloudy, with a low around 40. East southeast wind around 3 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
Morning
6 AM–noon
Dry
Afternoon
noon–6 PM
Dry
Evening
6 PM–midnight
Dry
Overnight
midnight–6 AM
Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 56.
Night: Areas of fog after 8pm. Mostly cloudy, with a low around 38.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
Morning
6 AM–noon
Dry
Afternoon
noon–6 PM
Dry
Evening
6 PM–midnight
Dry
Overnight
midnight–6 AM
Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Patchy fog before 8am. Mostly sunny, with a high near 58.
Night: Patchy fog between 11pm and 5am. Partly cloudy, with a low around 40.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
Morning
6 AM–noon
Dry
Afternoon
noon–6 PM
20% chance
Evening
6 PM–midnight
20% chance
Overnight
midnight–6 AM
Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 58.
Night: Patchy fog between 8pm and 11pm, then patchy fog and a slight chance of rain. Mostly cloudy, with a low around 40.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
Morning
6 AM–noon
Dry
Afternoon
noon–6 PM
20% chance · 0.1 in2.6 mm
Evening
6 PM–midnight
30% chance · 0.1 in2.4 mm
Overnight
midnight–6 AM
Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of rain and patchy fog. Partly sunny, with a high near 57.
Night: A chance of rain before 8pm. Mostly cloudy, with a low around 41.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
Morning
6 AM–noon
Dry
Afternoon
noon–6 PM
Dry
Evening
6 PM–midnight
Dry
Overnight
midnight–6 AM
Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
Morning
6 AM–noon
Dry
Afternoon
noon–6 PM
Dry
Evening
6 PM–midnight
Dry
Overnight
midnight–6 AM
Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
Morning
6 AM–noon
20% chance · 0.03 in0.8 mm
Afternoon
noon–6 PM
30% chance · 0.15 in3.8 mm
Evening
6 PM–midnight
30% chance · 0.1 in2.5 mm
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
Dry, high 62°, low 40°.
33% chance of rain, high 58°, low 42°, cooling off.
63% chance of rain, high 55°, low 40°, cooling off.
Mostly dry, highs 55–60°.
Want the meteorologists’ reasoning? Read the NWS forecast discussion (EKA) (opens in a new tab)
No meaningful changes from yesterday’s forecast.
Forecast peak 5.7 ft Tue 2 AM
Reading from Sat 5:45 AM · NWS gauge page
Forecast peak 11.0 ft Sat 7 AM
Reading from Sat 6 AM · NWS gauge page
Forecast peak 10.4 ft Tue 10 AM
Reading from Sat 5:15 AM · NWS gauge page
Reading from Sat 5:30 AM · NWS gauge page
What this week’s weather means for heating, cooling, pipes and fresh air.
About 62% less heating than a typical week.
Heating degree days, base 65°F
47, 17 and 5°F are the test points heat pumps are rated at.
Dry air outside (dew point 37°F).
Today, 2:00 PM–4:00 PM
Good stretch to open the windows.
Today’s expected high is about typical for the date.
On average 1°0° colder than normal (daily mean temperature).
Fieldbrook weather by month: normals, records, snow and freeze dates
Sunrise 7:37 AM, sunset 6:22 PM.
Clouds most of the night (about 62% cover).
Waxing gibbous
97% lit · growing