Weather Alerts

Issued by the National Weather Service

Flood Watch  FLOOD WATCH   Flood Watch

Areas Affected:
San Bernardino and Riverside County Valleys-The Inland Empire - San Bernardino County Mountains - Riverside County Mountains - Santa Ana Mountains and Foothills - Apple and Lucerne Valleys - Coachella Valley - San Gorgonio Pass Near Banning - Orange County Coastal - Orange County Inland
Effective: Mon, 12/22 2:56am Updated: Mon, 12/22 7:07am Urgency: Future
Expires: Mon, 12/22 3:00pm Severity:  Severe  Certainty: Possible

 
Details:
* WHAT...Flooding caused by excessive rainfall continues to be
possible.

* WHERE...A portion of Southwest California, including the following
areas, Apple and Lucerne Valleys, Coachella Valley, Orange County
Coastal Areas, Orange County Inland Areas, Riverside County
Mountains, San Bernardino County Mountains, San Bernardino and
Riverside County Valleys-The Inland Empire, San Gorgonio Pass near
Banning and Santa Ana Mountains and Foothills.

* WHEN...From Tuesday afternoon through Wednesday evening.

* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Mud and debris flow are possible near and in burn scars, including
the Airport, Bridge and Line burn scars.

* ADDITIONAL DETAILS...
- An Atmospheric River will likely bring widespread moderate to
heavy rain to the region late Tuesday through Wednesday.
Showers could begin to develop as early as Tuesday evening,
especially in the mountains. Heaviest and most widespread
rain is expected Wednesday morning continuing through the
afternoon in the Coachella Valley and in the mountains. Peak
rainfall rates of 0.50 to 1 inch per hour are expected. There
is a potential for locally heavier hourly rainfall rates to
develop with convection embedded in the main rain band or in
thunderstorms after the main band passes. Scattered locally
heavy showers could continue into Thursday but impacts from
any additional rain are expected to be more localized.
-Snow levels are expected to remain above 8000 ft during
period of heaviest precipitation bringing a heightened risk
of mud slides, debris flow, and areas of flash flooding in
the San Bernardino county mountains.
- https://www.weather.gov/safety/flood

Information:
You should monitor later forecasts and be alert for possible Flood
Warnings. Those living in areas prone to flooding should be prepared
to take action should flooding develop.

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