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Riverside County Alerts
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WARNINGS - WATCHES - ADVISORIES - STATEMENTS
Updates every 15 Minutes
Updated:September 18, 2025 7:00 am PDT

Flood Advisory FLOOD ADVISORY  
Riverside County

Effective: Thu, 9/18 5:14am Severity: Minor
Updated: September 18, 2025 7:00 am Urgency: Expected
Expires: Thu, 9/18 7:15am Certainty: Likely

Areas Affected: Riverside, CA
 
Alert Details:
* WHAT...Flooding caused by excessive rainfall is expected.

* WHERE...A portion of southern California, including the following
county, Riverside.

* WHEN...Until 715 AM PDT.

* IMPACTS...Minor flooding in low-lying and poor drainage areas.
Rises in small streams and normally dry arroyos. Some low-water
crossings may become impassable.

* ADDITIONAL DETAILS...
- At 513 AM PDT, Doppler radar indicated heavy rain due to
thunderstorms. Minor flooding is ongoing or expected to begin
shortly in the advisory area. Between 0.5 and 1 inch of rain
has fallen.
- Some locations that will experience flooding include...
Eagle Mtn.
- http://www.weather.gov/safety/flood

Information:
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Flood Watch FLOOD WATCH  
Riverside County

Effective: Thu, 9/18 12:18am Severity:  Severe 
Updated: September 18, 2025 7:00 am Urgency: Future
Expires: Thu, 9/18 2:30pm Certainty: Possible

Areas Affected: Parker Valley - Kofa - Yuma - Central La Paz - Gila River Valley - Palo Verde Valley
 
Alert Details:
* WHAT...Flooding caused by excessive rainfall continues to be
possible.

* WHERE...Portions of southwest Arizona, including the following
areas, Central La Paz, Gila River Valley, Kofa, Parker Valley and
Yuma and southeast California, including the following area, Palo
Verde Valley.

* WHEN...From 5 AM MST  /5 AM PDT/ early this morning through late
tonight.

* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Low-water crossings may be flooded.

* ADDITIONAL DETAILS...
- Abundant moisture has moved into southeast California and
southwest Arizona and this will help to bring scattered
thunderstorms producing heavy rainfall by late morning and
through the evening hours today. Localized rainfall amounts
of 1-2 inches are likely to occur.
- http://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.
Flood Watch FLOOD WATCH  
Riverside County

Effective: Thu, 9/18 12:18am Severity:  Severe 
Updated: September 18, 2025 7:00 am Urgency: Future
Expires: Thu, 9/18 2:30pm Certainty: Possible

Areas Affected: Joshua Tree NP West - Joshua Tree NP East - Imperial County Southwest - Salton Sea - Chuckwalla Mountains - Imperial County Southeast - Imperial County West - Imperial Valley - Chiriaco Summit - Chuckwalla Valley
 
Alert Details:
* WHAT...Flooding caused by excessive rainfall continues to be
possible.

* WHERE...Portions of southeast and southern California, including
the following areas, in southeast California, Chuckwalla
Mountains, Chuckwalla Valley, Imperial County Southeast, Imperial
County Southwest, Imperial County West, Imperial Valley and Salton
Sea. In southern California, Chiriaco Summit, Joshua Tree NP East
and Joshua Tree NP West.

* WHEN...From 5 AM PDT early this morning through late tonight.

* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Low-water crossings may be flooded.

* ADDITIONAL DETAILS...
- Abundant moisture has moved into southeast California and
southwest Arizona and this will help to bring scattered
thunderstorms producing heavy rainfall by late morning and
through the evening hours today. Localized rainfall amounts
of 1-2 inches are likely to occur.
- http://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.
Flood Watch FLOOD WATCH  
Riverside County

Effective: Thu, 9/18 2:16am Severity:  Severe 
Updated: September 18, 2025 7:00 am Urgency: Future
Expires: Thu, 9/18 3:45pm Certainty: Possible

Areas Affected: San Bernardino County Mountains - Riverside County Mountains - San Diego County Mountains - Apple and Lucerne Valleys - Coachella Valley - San Diego County Deserts - San Gorgonio Pass Near Banning
 
Alert 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, Riverside
County Mountains, San Bernardino County Mountains, San Diego
County Deserts, San Diego County Mountains and San Gorgonio Pass
near Banning.

* WHEN...Through late tonight.

* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Low-water crossings may be flooded.

* ADDITIONAL DETAILS...
- Scattered showers and thunderstorms will spread northward
across the area today with the most likely time for more
widespread and heavier rainfall from the morning through
early evening. Some thunderstorms may produce locally heavy
rainfall, which may lead to flooding. The most likely peak
hourly rainfall is one-half to one inch with isolated maximum
hourly rainfall to 2 inches.
- 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.