Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

A strong atmospheric river will continue heavy rain over southern California through Friday. The heaviest rainfall is ongoing today in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall has begun over the Sierra Nevada Mountains and will continue through Friday. Travel will become increasingly difficult over the passes due to snow and strong winds. Read More >

The Probabilistic Flood Outlook Summary (PFOS) is a product/service local to the NWS Grand Forks, ND office depicting the spring flood threat in the Red River of the North basin.

We encourage your comments or suggestions for improvement! Your feedback will help us determine product/service utility and if modifications are needed. Feedback/comments regarding this product can be directed to Amanda Lee, NWS Grand Forks Service Hydrologist, through e-mail: amanda.lee@noaa.gov.

This product/service is a graphic that depicts the probabilities of reaching certain river stages based on the standard probabilities of 95%, 90%, 75%, 50%, 25%, 10%, and 5%. This product is intended to give users an overview of the flood risk in the Red River of the North Basin for the next 90 days during the spring snowmelt season.

This page was last updated on March 13, 2025.

For instructions on how to read the PFOS graphics, click the thumbnail image below.

Use the map below to view forecast point PFOS Graphics

(click a site marker below, then click on the image to expand)

FGF RSS Feed

Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

WFO FGF Probabilistic Flood Outlook Summary

Use the map below to view forecast point PFOS Graphics