San Lorenzo River (CA) at Big Trees
3.8 mi- Level
- 3.2 ft
- Flow
- 18 cfs
Forecast peak 3.1 ft Sat 6 AM
Reading from Sat 4:30 AM · NWS gauge page
Appearance
Starts in 1 h 39 min
Issued for this forecast zone · National Weather Service San Francisco CA
What
Up to 1.9ft of inundation above ground level is possible in low-lying areas near shorelines and tidal waterways.
Impacts
High tides will result in flooding of low-lying infrastructure, isolated road closures, and coastal erosion. Rising tides will bring water and waves farther up the beach than normal, restricting escape from beaches and coastal areas.
Additional details
At the San Francisco tidal gauge, high tide is expected to be 1.1 ft above normal (6.9 ft MLLW) at 10:39 AM Saturday 10/24, 1.5 ft above normal (7.3 ft MLLW) at 11:07 AM Sunday 10/25, 1.6 ft above normal (7.4 ft MLLW) at 11:39 AM Monday 10/26, 1.8 ft above normal (7.6 ft MLLW) at 12:15 PM Tuesday 10/27, 1.9 ft above normal (7.7 ft MLLW) at 12:56 PM Wednesday 10/28, and 1.7 ft above normal (7.5 ft MLLW) at 01:43 PM Thursday 10/29. These predictions include up to 1.0 ft of surge that will enhance the astronomical tide and flooding threat. High tide varies up to 90 minutes earlier or later along the Pacific Coast and through the San Francisco Bay, respectively.
Precautionary actions
If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property.
Areas: San Francisco; North Bay Interior Valleys; San Francisco Bay Shoreline; Northern Monterey Bay; Southern Monterey Bay and Big Sur Coast
See it on weather.gov (opens in a new tab)Observed 5:55 AM PDT at KWVI
Clear and 48°9°.
Today: low 49°9° (likely 46°8° to 52°11°), high 73°23° (likely 67°19° to 73°23°).
Now 48°9°
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 6a | Clear | 48°9° (likely 46°8° to 54°12°) | 47°8° | 0% | 3 mph5 km/h from NNE, gusts 5 mph8 km/h | 80% | 0% | 0 |
| Sat 7a | Sunny | 48°9° (likely 46°8° to 52°11°) | 47°8° | 0% | 3 mph5 km/h from NNE, gusts 5 mph9 km/h | 79% | 0% | 0 |
| Sat 8a | Sunny | 48°9° (likely 46°8° to 52°11°) | 47°8° | 0% | 3 mph5 km/h from N, gusts 6 mph9 km/h | 76% | 0% | 0 |
| Sat 9a | Sunny | 54°12° (likely 51°11° to 57°14°) | 54°12° | 0% | 2 mph3 km/h from NNE, gusts 6 mph9 km/h | 66% | 0% | 1 |
| Sat 10a | Sunny | 59°15° (likely 58°14° to 63°17°) | 59°15° | 0% | 1 mph2 km/h from NE, gusts 6 mph10 km/h | 58% | 0% | 2 |
| Sat 11a | Sunny | 63°17° (likely 62°17° to 67°19°) | 63°17° | 0% | 1 mph2 km/h from ESE, gusts 6 mph9 km/h | 53% | 0% | 3 |
| Sat 12p | Sunny | 66°19° (likely 65°18° to 71°22°) | 67°19° | 0% | 2 mph3 km/h from S, gusts 4 mph7 km/h | 52% | 0% | 4 |
| Sat 1p | Sunny | 68°20° (likely 66°19° to 71°22°) | 68°20° | 0% | 3 mph5 km/h from SSW, gusts 6 mph9 km/h | 50% | 0% | 5 |
| Sat 2p | Sunny | 70°21° (likely 66°19° to 72°22°) | 70°21° | 0% | 3 mph5 km/h from SSW, gusts 6 mph10 km/h | 47% | 0% | 5 |
| Sat 3p | Sunny | 72°22° (likely 67°19° to 72°22°) | 72°22° | 0% | 3 mph5 km/h from SW, gusts 6 mph10 km/h | 45% | 0% | 4 |
| Sat 4p | Sunny | 72°22° (likely 67°19° to 72°22°) | 72°22° | 0% | 3 mph5 km/h from WSW, gusts 6 mph10 km/h | 45% | 0% | 3 |
| Sat 5p | Sunny | 70°21° (likely 66°19° to 71°22°) | 70°21° | 0% | 2 mph3 km/h from WSW, gusts 5 mph9 km/h | 45% | 0% | 2 |
| Sat 6p | Clear | 68°20° (likely 62°17° to 68°20°) | 68°20° | 0% | 1 mph2 km/h from WSW, gusts 3 mph5 km/h | 53% | 0% | 1 |
| Sat 7p | Clear | 62°17° (likely 59°15° to 63°17°) | 62°17° | 0% | 1 mph2 km/h from NE, gusts 5 mph9 km/h | 61% | 0% | 0 |
| Sat 8p | Clear | 59°15° (likely 56°13° to 61°16°) | 59°15° | 0% | 2 mph3 km/h from NNE, gusts 7 mph11 km/h | 70% | 0% | 0 |
| Sat 9p | Clear | 58°14° (likely 54°12° to 59°15°) | 58°14° | 0% | 3 mph5 km/h from NNE, gusts 8 mph13 km/h | 72% | 0% | 0 |
| Sat 10p | Clear | 56°13° (likely 52°11° to 57°14°) | 56°13° | 0% | 3 mph5 km/h from NNE, gusts 6 mph9 km/h | 72% | 0% | 0 |
| Sat 11p | Clear | 55°13° (likely 51°11° to 56°13°) | 55°13° | 0% | 5 mph8 km/h from N, gusts 7 mph11 km/h | 71% | 0% | 0 |
| Sun 12a | Clear | 55°13° (likely 51°11° to 55°13°) | 55°13° | 0% | 5 mph8 km/h from N, gusts 6 mph10 km/h | 70% | 0% | 0 |
| Sun 1a | Clear | 54°12° (likely 51°11° to 55°13°) | 54°12° | 0% | 3 mph5 km/h from N, gusts 5 mph8 km/h | 70% | 0% | 0 |
| Sun 2a | Clear | 53°12° (likely 51°11° to 54°12°) | 53°12° | 0% | 3 mph5 km/h from N, gusts 4 mph6 km/h | 69% | 0% | 0 |
| Sun 3a | Clear | 52°11° (likely 50°10° to 54°12°) | 52°11° | 0% | 2 mph3 km/h from N, gusts 5 mph7 km/h | 70% | 0% | 0 |
| Sun 4a | Clear | 52°11° (likely 50°10° to 54°12°) | 52°11° | 0% | 1 mph2 km/h from N, gusts 6 mph10 km/h | 70% | 40% | 0 |
| Sun 5a | Partly cloudy | 52°11° (likely 50°10° to 55°13°) | 52°11° | 0% | 1 mph2 km/h from NNE, gusts 5 mph8 km/h | 70% | 47% | 0 |
| Sun 6a | Mostly clear | 50°10° (likely 50°10° to 55°13°) | 50°10° | 0% | 1 mph2 km/h from NNE, gusts 4 mph7 km/h | 71% | 26% | 0 |
| Sun 7a | Partly sunny | 51°11° (likely 49°9° to 55°13°) | 51°11° | 0% | 1 mph2 km/h from NNE, gusts 4 mph7 km/h | 72% | 59% | 0 |
| Sun 8a | Partly sunny | 52°11° (likely 50°10° to 56°13°) | 52°11° | 0% | 1 mph2 km/h from NE, gusts 4 mph6 km/h | 72% | 73% | 0 |
| Sun 9a | Partly sunny | 56°13° (likely 54°12° to 60°16°) | 56°13° | 0% | 1 mph2 km/h from NE, gusts 3 mph5 km/h | 66% | 69% | 1 |
| Sun 10a | Cloudy | 62°17° (likely 60°16° to 64°18°) | 62°17° | 0% | 1 mph2 km/h from NE, gusts 3 mph5 km/h | 62% | 59% | 2 |
| Sun 11a | Partly sunny | 66°19° (likely 63°17° to 67°19°) | 66°19° | 0% | 2 mph3 km/h from SSW, gusts 5 mph8 km/h | 57% | 57% | 3 |
| Sun 12p | Partly sunny | 68°20° (likely 65°18° to 69°21°) | 69°21° | 0% | 2 mph3 km/h from SSW, gusts 5 mph9 km/h | 54% | 57% | 4 |
| Sun 1p | Partly sunny | 70°21° (likely 66°19° to 70°21°) | 70°21° | 0% | 2 mph3 km/h from SSW, gusts 7 mph11 km/h | 50% | 73% | 4 |
| Sun 2p | Mostly sunny | 71°22° (likely 67°19° to 71°22°) | 71°22° | 0% | 3 mph5 km/h from SW, gusts 8 mph13 km/h | 47% | 78% | 4 |
| Sun 3p | Cloudy | 73°23° (likely 66°19° to 73°23°) | 73°23° | 0% | 3 mph5 km/h from SW, gusts 10 mph16 km/h | 47% | 77% | 4 |
| Sun 4p | Cloudy | 71°22° (likely 64°18° to 71°22°) | 71°22° | 0% | 3 mph5 km/h from SW, gusts 11 mph17 km/h | 49% | 81% | 3 |
| Sun 5p | Cloudy | 70°21° (likely 61°16° to 70°21°) | 70°21° | 0% | 2 mph3 km/h from WSW, gusts 9 mph14 km/h | 52% | 81% | 2 |
| Sun 6p | Cloudy | 66°19° (likely 58°14° to 66°19°) | 66°19° | 0% | 2 mph3 km/h from WSW, gusts 7 mph11 km/h | 62% | 81% | 1 |
| Sun 7p | Cloudy | 62°17° (likely 56°13° to 62°17°) | 62°17° | 0% | 2 mph3 km/h from WSW, gusts 6 mph10 km/h | 72% | 77% | 0 |
| Sun 8p | Cloudy | 58°14° (likely 54°12° to 58°14°) | 58°14° | 0% | 0 mph0 km/h, gusts 7 mph11 km/h | 80% | 67% | 0 |
| Sun 9p | Clear | 56°13° (likely 52°11° to 57°14°) | 57°14° | 0% | 0 mph0 km/h, gusts 5 mph7 km/h | 84% | 31% | 0 |
| Sun 10p | Clear | 56°13° (likely 51°11° to 56°13°) | 56°13° | 0% | 0 mph0 km/h, gusts 4 mph7 km/h | 86% | 29% | 0 |
| Sun 11p | Clear | 55°13° (likely 50°10° to 57°14°) | 55°13° | 0% | 1 mph2 km/h from W, gusts 4 mph7 km/h | 87% | 17% | 0 |
| Mon 12a | Clear | 54°12° (likely 49°9° to 59°15°) | 54°12° | 0% | 1 mph2 km/h from W, gusts 3 mph5 km/h | 88% | 4% | 0 |
| Mon 1a | Clear | 53°12° (likely 48°9° to 58°14°) | 53°12° | 0% | 1 mph2 km/h from W, gusts 3 mph4 km/h | 89% | 6% | 0 |
| Mon 2a | Partly cloudy | 52°11° (likely 48°9° to 58°14°) | 52°11° | 0% | 2 mph3 km/h from N, gusts 3 mph4 km/h | 90% | 24% | 0 |
| Mon 3a | Partly cloudy | 51°11° (likely 47°8° to 57°14°) | 51°11° | 0% | 2 mph3 km/h from N, gusts 4 mph6 km/h | 92% | 28% | 0 |
| Mon 4a | Fog | 50°10° (likely 47°8° to 57°14°) | 50°10° | 0% | 2 mph3 km/h from N, gusts 4 mph7 km/h | 95% | 30% | 0 |
| Mon 5a | Fog | 49°9° (likely 46°8° to 56°13°) | 49°9° | 0% | 2 mph3 km/h from NNE, gusts 4 mph7 km/h | 97% | 26% | 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: Sunny. High near 73, with temperatures falling to around 70 in the afternoon. South southwest wind around 3 mph.
Tonight: Mostly clear. Low around 49, with temperatures rising to around 52 overnight. North wind 1 to 5 mph.
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
Official NWS forecast
Day: Mostly sunny. High near 74, with temperatures falling to around 70 in the afternoon. West southwest wind around 3 mph.
Night: Patchy fog after 4am. Partly cloudy, with a low around 48. Northwest wind around 2 mph.
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 71. North northwest wind 2 to 6 mph.
Night: Partly cloudy, with a low around 45.
Forecasts agreeIndependent forecasts are close; the range is narrow.
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 69.
Night: Mostly cloudy, with a low around 47.
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: Partly sunny, with a high near 68.
Night: Mostly cloudy, with a low around 49.
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 9am, then a slight chance of rain. Partly sunny, with a high near 65.
Night: A chance of rain. Mostly cloudy, with a low around 48.
Forecasts agreeIndependent forecasts are close; the range is narrow.
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: A chance of rain. Partly sunny, with a high near 64.
Night: A chance of rain. Mostly cloudy, with a low around 48.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
Morning
6 AM–noon
30% chance
Afternoon
noon–6 PM
30% chance
Evening
6 PM–midnight
30% chance
Overnight
midnight–6 AM
20% chance
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.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
Morning
6 AM–noon
20% chance
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.
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
20% chance · 0.06 in1.5 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.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
Dry, high 73°, low 49°.
Dry, high 74°, low 48°.
Dry, high 71°, low 45°, cooling off.
Mostly dry, highs 62–69°.
Want the meteorologists’ reasoning? Read the NWS forecast discussion (MTR) (opens in a new tab)
No meaningful changes from yesterday’s forecast.
Forecast peak 3.1 ft Sat 6 AM
Reading from Sat 4:30 AM · NWS gauge page
Reading from Sat 4 AM · NWS gauge page
Reading from Sat 4:15 AM · NWS gauge page
Reading from Sat 4:15 AM · NWS gauge page
What this week’s weather means for heating, cooling, pipes and fresh air.
About 65% less heating than a typical week.
Heating degree days, base 65°F
Dry air outside (dew point 43°F).
Today, 11:00 AM–7:00 PM
Good stretch to open the windows.
Today’s expected high is about typical for the date.
On average 1°0° warmer than normal (daily mean temperature).
Pasatiempo weather by month: normals, records, snow and freeze dates
Sunrise 7:24 AM, sunset 6:19 PM.
Cloud forecast not available for tonight.
Waxing gibbous
97% lit · growing