Flood Potential Outlook
Issued by NWS Eureka, CA

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FGUS76 KEKA 070019

419 PM PST Fri Jan 6 2017

...Moderate to Heavy Rain Tonight into Next Week...
...Steep and Rapid Rises on Mainstem Rivers...
...Urban and Small Stream Flooding is Likely...

An Atmospheric River will bring copious amounts of moisture to
northwest California resulting in significant rainfall amounts
starting late tonight through mid-week next week. The highest
rainfall totals are expected in the coastal mountains.

Two weather systems are expected to bring significant rainfall
amounts across Del Norte, Humboldt, Mendocino, and Trinity
Counties. The first arrives tonight and continues through Monday
afternoon. The second system arrives early Tuesday morning and
persists through Thursday. Runoff is expected to be less with the
second system as it will be a cooler system.

With these systems, expect steep and rapid rises on the mainstem
rivers. Standing or ponding water is also expected in low-lying
areas in and in areas with poor drainage. Also urban street
flooding is expected where storm drains are unable to keep up with
the rainfall.

Current forecast rainfall amounts for tonight through Thursday:

Del Norte county: 6 to 12 inches, highest amounts in the higher
terrain and lowest amounts in the coastal plain.

Humboldt County: 5.5 to 12 inches, highest amounts in the higher
terrain and lowest amounts near Humboldt Bay.

Mendocino County: 7 to 12 inches, highest amounts in the high

Trinity County: 6 to 10 inches, highest amounts in the southern
half of the county.

Watches and warnings will be issued by the National Weather
Service as the situation warrants.

Listen to NOAA Weather Radio or your local media for later
updates on this developing situation.

This is the last Hydrologic Outlook that will be issued on this event.


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