Napa River

Near St Helena USGS: 11456000 Provisional Data Last Updated: May 11, 09:44 PM Pacific Daylight Time

Current Flow

15.2 cfs

Flow Conditions Normal Flow Is Falling

No Water Temp Probe

Expected Weather

Temp --°F

Wind -- mph

Rain Chance --%

Pressure -- hPa

Location

Historical context for today's date: 25th–75th Percentile — typical for this time of year

System Insights

Typical seasonal flows for this small stream.

Verify access, permits, and local conditions before entering any waterway.

Today's Weather

Forecast Details

Morning

At 6 AM: 54°F and Fog, wind E at 2 mph. By 10 AM: 63°F and Partly Cloudy, wind SE at 3 mph.

Afternoon/Evening

At 2 PM: 85°F and Mainly Clear, wind SE at 5 mph. By 6 PM: 86°F and Mainly Clear, wind SE at 8 mph.

Overnight

Dropping from 64°F at 10 PM to 51°F by 4 AM. Conditions Clear with wind SE at 2 mph.

3-Day Outlook

🌘 Waning Crescent

Today, May 11

🌫️

89° / 54°

Chance of Rain: 0%

🌅 6:01 AM 🌇 8:10 PM

Tuesday, May 12

🌫️

83° / 50°

Chance of Rain: 0%

🌅 6:00 AM 🌇 8:11 PM

Wednesday, May 13

☀️

77° / 52°

Chance of Rain: 2%

🌅 5:59 AM 🌇 8:12 PM

Flow Trend & 7-Day Forecast

Source: USGS

Current (CFS)

7-Day Forecast

Historical Median

Normal Range (p25–p75)

7-Day Water Temperature (°F)