National Weather Service United States Department of Commerce

Many different estimates of observed precipitation are used in the river forecast process. Sources include rain gauge networks (both official and volunteer) as well as radar estimates.

Image showing last 1hr gridded rainfall.

Image showing last 3hr gridded rainfall.

Image showing last 6hr gridded rainfall.

Image showing last 24hr gridded rainfall.

Image showing last 24hr rainfall averaged by river basin.


Caution: Images update every hour even if underlying data does not update.

Low Bandwidth
 

Daily 24hr precipitation report (HYDORN)
Text only, forecaster QCed. Point observations from gauges. Updates daily.

Daily 24hr precipitation from CoCoRAHS volunteers
Static images, no QC. Point observations from gauges.

Precipitation maps from SRCC
Static images, no QC. Gridded estimates derived from gauges.

 

Full-Featured
 

Latest precipitation interactive maps
Interactive maps with dynamic overlays. Gridded estimates from a combination of rain gauges and radar. Not recommended for mobile devices.

Daily 24hr (ending at 12 UTC) gridded precipitation
Zoomable, panable map, forecaster QCed. Gridded estimates from a combination of rain gauges and radar. May be slow on mobile devices.

Hourly gridded precipitation
Zoomable, panable map, with some limited forecaster QC. Gridded estimates from a combination of rain gauges and radar. May be slow on mobile devices.