Remnant heavy rainfall from Ian may bring limited flash, urban, and small stream flooding today across portions of the mid-Atlantic. Ongoing major to record river flooding following Ian will continue this week across portions of central Florida. Locally heavy rainfall and flash flooding are possible in southern Utah through Monday. Read More >
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.
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.
Latest precipitation interactive maps
Gridded estimates from a combination of rain gauges and radar QCed by forecasters. Interactive maps with reduced functionality indended for mobile devices and tablets.
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.
