Satellites, river stage graphs, rainfall maps, atmospheric rivers, and more: Internet resources for watching the storm and waterways

Here are some internet resources where you can find information on weather conditions, river flows, and reservoirs that might be useful for watching the storm and its impacts from your computer.

If you have an internet resource that you think would be a useful addition to this page, please send me an email.

Be safe out there!

For weather and storm information

Radar NWSRadar

Check out the radar from the National Weather Service.


Check out the Western satellite from NOAA here.

AR PortalAtmospheric River Portal

Get current atmospheric river conditions and forecasts and more from the Atmospheric River Portal from Scripps and the Center for Western Water and Weather Extremes.  (More atmospheric river information by clicking here.)


Weather, Highway, and Marine Conditions

Outdoor Buddy WeatherThis page at My Outdoor Buddy has many links to California and Oregon weather information including Weather Reports, Highways & Passes, Lake and Reservoir Levels, River Conditions, Coastal Waters Marine Forecasts and Conditions (including swell, wave height, interval, sea surface temperatures and surfing conditions) as well as Bar Cams and Tide Predictions all in one place.

Rainfall mapsRainfall Maps

You can see a rainfall map for the last hour, six hours, 24 hours, or more at this website. Look at it statewide or by region.

Eight station indexItem_9_Panel_1_Leahigh_Presentation_Page_04

Look at a graph of the Northern Sierra 8-station index here.

Five station indexPLOT_FSI

Check out a graph of the San Joaquin 5-station index here.

The latest watches, warnings, and advisorieswatches warnings

Get a list of all the watches, warnings and advisories for California at this National Weather Service website.


For river and stream conditions

California Nevada River Forecast CenterCNRFC Pic

Check in here to find out which rivers are at monitor stage or flood stage.  You can also look at observed or forecasted precipitation, temperatures, snow levels, freeze levels and more.

Advanced Hydro PredictAdvanced Hydrologic Prediction Service

This website from the National Weather Service has a wealth of information.  Mouse over a particular gage to get a graph of the flow for the last four days plus the forecasted flows for the next five days. Precipitation data as well.

ESRI flooding

 Flooding Map from ESRI with Social Media Links

Continuously updated US flooding information from the National Weather Service shows observed flooding locations and statistics, flood warning areas, as well as current precipitation.  See the real-time effects of the flooding via social media posts.

River Stage MapsRiver Stage Maps

At this CDEC website, you can display river stage maps for current hour and the past two hours for the North Coast, Upper Sacramento, Lower Sacramento, Russian, Central Coast, San Joaquin, or Truckee rivers.

Sacto CountySacramento County Alert System

The Sacramento County’s ALERT system consists of 2 base stations, and 50 gauging stations.  The purpose of the County’s ALERT website is to provide access to stage and rainfall information during storm events.  Find streamflow, forecasts, and more here.

webcamUSGS Webcams

Check out webcams of the Eel, Truckee, and Merced rivers, plus San Pedro Creek at Goleta and Arroyo Seco near Pasadena.

Reservoir Conditions

Reservoir Conditions – Top of Conservation Conditions (Statewide)Reservoirs flood control

Although it’s not an issue this year with the reservoirs drawn down low, this special variation of the standard DWR reservoir webpage shows the amount of storage available for flood control.

ReservoirsReservoir Conditions (Individual)

Check out the effect of the storm on the reservoirs.  Access an graph for each individual reservoir on this page.  Note: data is not real-time; it is updated at midnight.

 Flood Information

Floodplain mapPrint out a floodplain map

At this Department of Water Resources (DWR) website, you can display the latest floodplains in a web viewer.  The data has been expanded to cover the floodplains to cover all counties in the State and to include 500-year floodplains. The 100-, 200-, and 500-year floodplains can be selected for display using this viewer. The web viewer allows users to view a particular area, identify their potential flood hazards, and print a floodplain map.

CA Flood PreparednessCalifornia Flood Preparedness Website

Plenty of information here on types of flooding, determining and reducing your flood risk and more.

Ready.govFlood Preparedness from

Here’s the federal government’s website for flood preparedness.

Flood maps and diagrams


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