National Weather Service United States Department of Commerce

Locally Heavy Rainfall Possible Over the Four Corners; Critical Fire Weather Conditions in the Great Basin

Monsoon moisture will result in locally heavy showers and thunderstorms over the Four Corners region, which could lead to flash flooding. While, critical fire weather threats are expected for much of the Great Basin, from dry and windy conditions. Finally, Tropical Cyclone Humberto remains well offshore of the Southeast, but rip currents and heavy surf are expected from Florida to the Carolinas. 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.

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.

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.

 

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.