Alert archive / California / Flood Watches in 2021

Flood Watch 2, NWS San Diego, CA

December 22, 20214 counties in California

NWS San Diego, CA issued this flood watch at Dec 22, 2021, 10:15 AM PST for 4 counties in California. It took effect at Dec 23, 2021, 7:00 PM PST. It was in force for 17 hr.

The area

The counties it named.

The facts

Issued
Dec 22, 2021, 10:15 AM PST (18:15 UTC)
In effect from
Dec 23, 2021, 7:00 PM PST
Expired
Dec 24, 2021, 12:00 PM PST
In force
17 hr
Issued by
NWS San Diego, CA
Flood severity
None

Counties Orange County, CA, Riverside County, CA, San Bernardino County, CA, San Diego County, CA

The radar

The Santa Ana Mts radar (KSOX), 88 km from the middle of the area, began a volume at 18:17 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

San Diego, CA (KNKX), launched 12:00Z, 6.3 hours before the alert went out and 124 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, San Diego, CA at 12:00Z on 2021-12-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, San Diego, CA at 12:00Z on 2021-12-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 22 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2359 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
22 m²/s²
0-3 km storm-relative helicity
63 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

218 
WGUS66 KSGX 221815
FFASGX

URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service San Diego CA
1015 AM PST Wed Dec 22 2021

CAZ043-048-050-055>058-065-552-554-230215-
/O.NEW.KSGX.FA.A.0002.211224T0300Z-211224T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
San Diego County Coastal Areas-San Bernardino and Riverside County
Valleys-The Inland Empire-San Diego County Valleys-San Bernardino
County Mountains-Riverside County Mountains-Santa Ana Mountains and
Foothills-San Diego County Mountains-San Gorgonio Pass Near Banning-
Orange County Coastal Areas-Orange County Inland Areas-
Including the cities of Vista, Ontario, Santee, Idyllwild-Pine Cove, 
Fontana, Garden Grove, Fullerton, Orange, Banning, Santa Ana, 
National City, Riverside, Poway, Big Bear Lake, Oceanside, Big Bear 
City, Desert Hot Springs, San Diego, Lake Arrowhead, Irvine, El 
Cajon, Newport Beach, Escondido, Chula Vista, Crestline, San 
Clemente, Wrightwood, Corona, Anaheim, Huntington Beach, San 
Bernardino, Moreno Valley, Mission Viejo, Laguna Beach, Julian, Pine 
Valley, Costa Mesa, La Mesa, Encinitas, Running Springs, San Marcos, 
Carlsbad, and Rancho Cucamonga
1015 AM PST Wed Dec 22 2021

...FLOOD WATCH IN EFFECT FROM THURSDAY EVENING THROUGH FRIDAY 
MORNING...

* WHAT...Flooding caused by excessive rainfall is possible.

* WHERE...A portion of Southern California, including the following 
  areas, 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 
  Diego County Coastal Areas, San Diego County Mountains, San Diego 
  County Valleys, San Gorgonio Pass Near Banning and Santa Ana 
  Mountains and Foothills. This watch includes the Bond, Apple, and 
  El Dorado burn scars.

* WHEN...From Thursday evening through Friday morning.

* IMPACTS...Excessive runoff may result in flooding of rivers, 
  creeks, streams, and other low-lying and flood-prone locations. 
  Flooding may occur in poor drainage and urban areas. Debris flows 
  are possible in and near the Bond, Apple and El Dorado burn scars.

* ADDITIONAL DETAILS...
  - An atmospheric river will deliver heavy rainfall to Southern
    California with the heaviest rain occurring after midnight
    Thursday night through Friday morning. Total rainfall amounts
    of 1.5 to 2.5 inches is expected across the coast and valleys
    with 3 to 6 inches in the mountains. Rainfall rates to 0.60
    inches per hour are forecast. Flash flooding is possible,
    including dangerous debris flows in and around the Bond,
    Apple, and El Dorado burn scars.
  - http://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

$$

CAZ060>062-230215-
/O.NEW.KSGX.FA.A.0002.211224T0800Z-211224T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Apple and Lucerne Valleys-Coachella Valley-San Diego County Deserts-
Including the cities of Palm Desert, Indio, Victorville, Palm Desert 
Country, Palm Springs, Lucerne Valley, Borrego Springs, Apple 
Valley, Hesperia, Coachella, La Quinta, and Cathedral City
1015 AM PST Wed Dec 22 2021

...FLOOD WATCH IN EFFECT FROM LATE THURSDAY NIGHT THROUGH FRIDAY 
MORNING...

* WHAT...Flooding caused by excessive rainfall is possible.

* WHERE...A portion of Southern California, including the following 
  areas, Apple and Lucerne Valleys, Coachella Valley and San Diego 
  County Deserts.

* WHEN...From late Thursday night through Friday morning.

* IMPACTS...Flooding may occur in poor drainage and urban areas. 
  Low-water crossings may be flooded.

* ADDITIONAL DETAILS...
  - An atmospheric river will impact the area, delivering the
    potential of heavy rainfall to the deserts. The heaviest rain
    is expected to occur after midnight Thursday night through
    Friday morning. Total rainfall amounts of 0.50 to 1.00 inch
    is expected with localized amounts up to 1.5 inches possible.
    Flash flooding is possible.
  - http://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

$$

Gregoria
6 follow-up statements
465 
WGUS66 KSGX 230354
FFASGX

Flood Watch
National Weather Service San Diego CA
754 PM PST Wed Dec 22 2021

CAZ043-048-050-055>058-065-552-554-231200-
/O.CON.KSGX.FA.A.0002.211224T0300Z-211224T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
San Diego County Coastal Areas-San Bernardino and Riverside County
Valleys-The Inland Empire-San Diego County Valleys-San Bernardino
County Mountains-Riverside County Mountains-Santa Ana Mountains and
Foothills-San Diego County Mountains-San Gorgonio Pass Near Banning-
Orange County Coastal Areas-Orange County Inland Areas-
Including the cities of Vista, Ontario, Santee, Idyllwild-Pine Cove, 
Fontana, Garden Grove, Fullerton, Orange, Banning, Santa Ana, 
National City, Riverside, Poway, Big Bear Lake, Oceanside, Big Bear 
City, Desert Hot Springs, San Diego, Lake Arrowhead, Irvine, El 
Cajon, Newport Beach, Escondido, Chula Vista, Crestline, San 
Clemente, Wrightwood, Corona, Anaheim, Huntington Beach, San 
Bernardino, Moreno Valley, Mission Viejo, Laguna Beach, Julian, Pine 
Valley, Costa Mesa, La Mesa, Encinitas, Running Springs, San Marcos, 
Carlsbad, and Rancho Cucamonga
754 PM PST Wed Dec 22 2021

...FLOOD WATCH REMAINS IN EFFECT FROM THURSDAY EVENING THROUGH 
FRIDAY MORNING...

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

* WHERE...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 
  Diego County Coastal Areas, San Diego County Mountains, San Diego 
  County Valleys, San Gorgonio Pass Near Banning and Santa Ana 
  Mountains and Foothills.

* WHEN...From Thursday evening through Friday morning.

* IMPACTS...Excessive runoff may result in flooding of rivers, 
  creeks, streams, and other low-lying and flood-prone locations. 
  Flooding may occur in poor drainage and urban areas.

* ADDITIONAL DETAILS...
  - An atmospheric river will deliver heavy rainfall to Southern
    California with the heaviest rain occurring after midnight
    Thursday night through Friday morning. Total rainfall amounts
    of 1.5 to 2.5 inches is expected across the coast and valleys
    with 3 to 6 inches in the mountains. Rainfall rates to 0.60
    inches per hour are forecast. Flash flooding is possible,
    including dangerous debris flows in and around the Bond,
    Apple, and El Dorado burn scars.
  - http://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

$$

CAZ060>062-231200-
/O.CON.KSGX.FA.A.0002.211224T0800Z-211224T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Apple and Lucerne Valleys-Coachella Valley-San Diego County Deserts-
Including the cities of Palm Desert, Indio, Victorville, Palm Desert 
Country, Palm Springs, Lucerne Valley, Borrego Springs, Apple 
Valley, Hesperia, Coachella, La Quinta, and Cathedral City
754 PM PST Wed Dec 22 2021

...FLOOD WATCH REMAINS IN EFFECT FROM LATE THURSDAY NIGHT THROUGH 
FRIDAY MORNING...

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

* WHERE...A portion of Southern California, including the following 
  areas, Apple and Lucerne Valleys, Coachella Valley and San Diego 
  County Deserts.

* WHEN...From late Thursday night through Friday morning.

* IMPACTS...Flooding may occur in poor drainage and urban areas. 
  Low-water crossings may be flooded.

* ADDITIONAL DETAILS...
  - An atmospheric river will impact the area, delivering the
    potential of heavy rainfall to the deserts. The heaviest rain
    is expected to occur after midnight Thursday night through
    Friday morning. Total rainfall amounts of 0.50 to 1.00 inch
    is expected with localized amounts up to 1.5 inches possible.
    Flash flooding is possible.
  - http://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

$$

Moede
532 
WGUS66 KSGX 231140
FFASGX

Flood Watch
National Weather Service San Diego CA
340 AM PST Thu Dec 23 2021

CAZ043-048-050-055>058-065-552-554-232300-
/O.CON.KSGX.FA.A.0002.211224T0300Z-211224T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
San Diego County Coastal Areas-San Bernardino and Riverside County
Valleys-The Inland Empire-San Diego County Valleys-San Bernardino
County Mountains-Riverside County Mountains-Santa Ana Mountains and
Foothills-San Diego County Mountains-San Gorgonio Pass Near Banning-
Orange County Coastal Areas-Orange County Inland Areas-
Including the cities of Vista, Ontario, Santee, Idyllwild-Pine Cove, 
Fontana, Garden Grove, Fullerton, Orange, Banning, Santa Ana, 
National City, Riverside, Poway, Big Bear Lake, Oceanside, Big Bear 
City, Desert Hot Springs, San Diego, Lake Arrowhead, Irvine, El 
Cajon, Newport Beach, Escondido, Chula Vista, Crestline, San 
Clemente, Wrightwood, Corona, Anaheim, Huntington Beach, San 
Bernardino, Moreno Valley, Mission Viejo, Laguna Beach, Julian, Pine 
Valley, Costa Mesa, La Mesa, Encinitas, Running Springs, San Marcos, 
Carlsbad, and Rancho Cucamonga
340 AM PST Thu Dec 23 2021

...FLOOD WATCH REMAINS IN EFFECT FROM THIS EVENING THROUGH FRIDAY 
MORNING...

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

* WHERE...A portion of Southern California, including the following 
  areas, 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 
  Diego County Coastal Areas, San Diego County Mountains, San Diego 
  County Valleys, San Gorgonio Pass Near Banning and Santa Ana 
  Mountains and Foothills.

* WHEN...From this evening through Friday morning.

* IMPACTS...Excessive runoff may result in flooding of rivers, 
  creeks, streams, and other low-lying and flood-prone locations. 
  Flooding may occur in poor drainage and urban areas.

* ADDITIONAL DETAILS...
  - An atmospheric river is expected to bring widespread heavy
    rainfall for tonight into early Friday with hourly rainfall
    up to 0.60 inch. Flash flooding is possible, including
    dangerous debris flows in and around the Bond, and El Dorado
    burn scars.
  - http://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

$$

CAZ060>062-232300-
/O.CON.KSGX.FA.A.0002.211224T0800Z-211224T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Apple and Lucerne Valleys-Coachella Valley-San Diego County Deserts-
Including the cities of Palm Desert, Indio, Victorville, Palm Desert 
Country, Palm Springs, Lucerne Valley, Borrego Springs, Apple 
Valley, Hesperia, Coachella, La Quinta, and Cathedral City
340 AM PST Thu Dec 23 2021

...FLOOD WATCH REMAINS IN EFFECT FROM LATE TONIGHT THROUGH FRIDAY 
MORNING...

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

* WHERE...A portion of Southern California, including the following 
  areas, Apple and Lucerne Valleys, Coachella Valley and San Diego 
  County Deserts.

* WHEN...From late tonight through Friday morning.

* IMPACTS...Flooding may occur in poor drainage and urban areas. 
  Low-water crossings may be flooded.

* ADDITIONAL DETAILS...
  - An atmospheric river will bring widespread rainfall. The
    heaviest rainfall is expected from after midnight into Friday
    morning with total rainfall through Friday mostly one-half to
    one inch.
  - http://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

$$

17
118 
WGUS66 KSGX 232146
FFASGX

Flood Watch
National Weather Service San Diego CA
146 PM PST Thu Dec 23 2021

CAZ043-048-050-055>058-065-552-554-240600-
/O.CON.KSGX.FA.A.0002.211224T0300Z-211224T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
San Diego County Coastal Areas-San Bernardino and Riverside County
Valleys-The Inland Empire-San Diego County Valleys-San Bernardino
County Mountains-Riverside County Mountains-Santa Ana Mountains and
Foothills-San Diego County Mountains-San Gorgonio Pass Near Banning-
Orange County Coastal Areas-Orange County Inland Areas-
Including the cities of Vista, Ontario, Santee, Idyllwild-Pine Cove, 
Fontana, Garden Grove, Fullerton, Orange, Banning, Santa Ana, 
National City, Riverside, Poway, Big Bear Lake, Oceanside, Big Bear 
City, Desert Hot Springs, San Diego, Lake Arrowhead, Irvine, El 
Cajon, Newport Beach, Escondido, Chula Vista, Crestline, San 
Clemente, Wrightwood, Corona, Anaheim, Huntington Beach, San 
Bernardino, Moreno Valley, Mission Viejo, Laguna Beach, Julian, Pine 
Valley, Costa Mesa, La Mesa, Encinitas, Running Springs, San Marcos, 
Carlsbad, and Rancho Cucamonga
146 PM PST Thu Dec 23 2021

...FLOOD WATCH REMAINS IN EFFECT FROM 7 PM PST THIS EVENING THROUGH 
FRIDAY MORNING...

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

* WHERE...A portion of Southern California, including the following 
  areas, 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 
  Diego County Coastal Areas, San Diego County Mountains, San Diego 
  County Valleys, San Gorgonio Pass Near Banning and Santa Ana 
  Mountains and Foothills. This includes the Bond, Apple and El 
  Dorado burn scars.

* WHEN...From 7 PM PST this evening through Friday morning.

* IMPACTS...Excessive runoff may result in flooding of rivers, 
  creeks, streams, and other low-lying and flood-prone locations. 
  Flooding may occur in poor drainage and urban areas. Debris flows 
  are possible in and near the Bond, Apple and El Dorado burn scars.

* ADDITIONAL DETAILS...
  - An atmospheric river will bring widespread heavy rainfall
    this evening through Friday morning. Total rainfall amounts
    of 2 to 3 inches is forecast for the coast and valleys with 3
    to 6 inches, locally up to 7 inches, in the mountains. Hourly
    rainfall amounts of up to 0.60 inches is anticipated. Flash
    flooding is possible, including dangerous debris flows in and
    around the Bond, Apple and El Dorado burn scars.
  - http://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

$$

CAZ060>062-240600-
/O.CON.KSGX.FA.A.0002.211224T0800Z-211224T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Apple and Lucerne Valleys-Coachella Valley-San Diego County Deserts-
Including the cities of Palm Desert, Indio, Victorville, Palm Desert 
Country, Palm Springs, Lucerne Valley, Borrego Springs, Apple 
Valley, Hesperia, Coachella, La Quinta, and Cathedral City
146 PM PST Thu Dec 23 2021

...FLOOD WATCH REMAINS IN EFFECT FROM MIDNIGHT PST TONIGHT THROUGH 
FRIDAY MORNING...

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

* WHERE...A portion of Southern California, including the following 
  areas, Apple and Lucerne Valleys, Coachella Valley and San Diego 
  County Deserts.

* WHEN...From Midnight PST tonight through Friday morning.

* IMPACTS...Flooding may occur in poor drainage and urban areas. 
  Low-water crossings may be flooded.

* ADDITIONAL DETAILS...
  - An atmospheric river will bring widespread rainfall. The
    heaviest rainfall is expected from after midnight into Friday
    morning with total rainfall through Friday of 1 to 1.5 inches
    locally up to 2 inches. This could lead to flash flooding.
  - http://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

$$

Gregoria
248 
WGUS66 KSGX 240548
FFASGX

Flood Watch
National Weather Service San Diego CA
948 PM PST Thu Dec 23 2021

CAZ043-048-050-055>058-065-552-554-241415-
/O.CON.KSGX.FA.A.0002.000000T0000Z-211224T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
San Diego County Coastal Areas-San Bernardino and Riverside County
Valleys-The Inland Empire-San Diego County Valleys-San Bernardino
County Mountains-Riverside County Mountains-Santa Ana Mountains and
Foothills-San Diego County Mountains-San Gorgonio Pass Near Banning-
Orange County Coastal Areas-Orange County Inland Areas-
Including the cities of Vista, Ontario, Santee, Idyllwild-Pine Cove, 
Fontana, Garden Grove, Fullerton, Orange, Banning, Santa Ana, 
National City, Riverside, Poway, Big Bear Lake, Oceanside, Big Bear 
City, Desert Hot Springs, San Diego, Lake Arrowhead, Irvine, El 
Cajon, Newport Beach, Escondido, Chula Vista, Crestline, San 
Clemente, Wrightwood, Corona, Anaheim, Huntington Beach, San 
Bernardino, Moreno Valley, Mission Viejo, Laguna Beach, Julian, Pine 
Valley, Costa Mesa, La Mesa, Encinitas, Running Springs, San Marcos, 
Carlsbad, and Rancho Cucamonga
948 PM PST Thu Dec 23 2021

...FLOOD WATCH REMAINS IN EFFECT THROUGH FRIDAY MORNING...

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

* WHERE...A portion of Southern California, including the following 
  areas, 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 
  Diego County Coastal Areas, San Diego County Mountains, San Diego 
  County Valleys, San Gorgonio Pass Near Banning and Santa Ana 
  Mountains and Foothills.

* WHEN...Through Friday morning.

* IMPACTS...Excessive runoff may result in flooding of rivers, 
  creeks, streams, and other low-lying and flood-prone locations. 
  Flooding may occur in poor drainage and urban areas.

* ADDITIONAL DETAILS...
  - An atmospheric river will bring widespread heavy rainfall
    through Friday morning. Total rainfall amounts of 2 to 3
    inches is forecast for the coast and valleys with 3 to 6
    inches, locally up to 7 inches, in the mountains. Hourly
    rainfall amounts of up to 0.60 inches is anticipated. Flash
    flooding is possible, including dangerous debris flows in and
    around the Bond, Apple and El Dorado burn scars.
  - http://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

$$

CAZ060>062-241415-
/O.CON.KSGX.FA.A.0002.211224T0800Z-211224T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Apple and Lucerne Valleys-Coachella Valley-San Diego County Deserts-
Including the cities of Palm Desert, Indio, Victorville, Palm Desert 
Country, Palm Springs, Lucerne Valley, Borrego Springs, Apple 
Valley, Hesperia, Coachella, La Quinta, and Cathedral City
948 PM PST Thu Dec 23 2021

...FLOOD WATCH REMAINS IN EFFECT THROUGH FRIDAY MORNING...

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

* WHERE...A portion of Southern California, including the following 
  areas, Apple and Lucerne Valleys, Coachella Valley and San Diego 
  County Deserts.

* WHEN...Through Friday morning.

* IMPACTS...Flooding may occur in poor drainage and urban areas. 
  Low-water crossings may be flooded.

* ADDITIONAL DETAILS...
  - An atmospheric river will bring widespread rainfall. The
    heaviest rainfall is expected through Friday morning with
    total rainfall through Friday of 1 to 1.5 inches locally up
    to 2 inches. This could lead to flash flooding.
  - http://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

$$

Connolly
101 
WGUS66 KSGX 241048
FFASGX

Flood Watch
National Weather Service San Diego CA
248 AM PST Fri Dec 24 2021

CAZ060>062-241200-
/O.CAN.KSGX.FA.A.0002.000000T0000Z-211224T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Apple and Lucerne Valleys-Coachella Valley-San Diego County Deserts-
Including the cities of Palm Desert, Indio, Victorville, Palm Desert 
Country, Palm Springs, Lucerne Valley, Borrego Springs, Apple 
Valley, Hesperia, Coachella, La Quinta, and Cathedral City
248 AM PST Fri Dec 24 2021

...FLOOD WATCH IS CANCELLED...

The Flood Watch is cancelled for a portion of Southern California, 
including the following areas, Apple and Lucerne Valleys, Coachella 
Valley and San Diego County Deserts.

Flooding is no longer expected to pose a threat. Please continue to 
heed remaining road closures.

$$

CAZ043-048-050-055>058-065-552-554-242000-
/O.CON.KSGX.FA.A.0002.000000T0000Z-211224T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
San Diego County Coastal Areas-San Bernardino and Riverside County
Valleys-The Inland Empire-San Diego County Valleys-San Bernardino
County Mountains-Riverside County Mountains-Santa Ana Mountains and
Foothills-San Diego County Mountains-San Gorgonio Pass Near Banning-
Orange County Coastal Areas-Orange County Inland Areas-
Including the cities of Vista, Ontario, Santee, Idyllwild-Pine Cove, 
Fontana, Garden Grove, Fullerton, Orange, Banning, Santa Ana, 
National City, Riverside, Poway, Big Bear Lake, Oceanside, Big Bear 
City, Desert Hot Springs, San Diego, Lake Arrowhead, Irvine, El 
Cajon, Newport Beach, Escondido, Chula Vista, Crestline, San 
Clemente, Wrightwood, Corona, Anaheim, Huntington Beach, San 
Bernardino, Moreno Valley, Mission Viejo, Laguna Beach, Julian, Pine 
Valley, Costa Mesa, La Mesa, Encinitas, Running Springs, San Marcos, 
Carlsbad, and Rancho Cucamonga
248 AM PST Fri Dec 24 2021

...FLOOD WATCH REMAINS IN EFFECT UNTIL NOON PST TODAY...

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

* WHERE...A portion of Southern California, including the following 
  areas, 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 
  Diego County Coastal Areas, San Diego County Mountains, San Diego 
  County Valleys, San Gorgonio Pass Near Banning and Santa Ana 
  Mountains and Foothills.

* WHEN...Until Noon PST today.

* IMPACTS...Excessive runoff may result in flooding of rivers, 
  creeks, streams, and other low-lying and flood-prone locations. 
  Flooding may occur in poor drainage and urban areas.

* ADDITIONAL DETAILS...
  - Showers with locally higher rainfall rates falling on soils
    saturated by recent rainfall could cause localized flooding
    through this morning.
  - http://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

$$

17
008 
WGUS66 KSGX 242002
FFASGX

Flood Watch
National Weather Service San Diego CA
1202 PM PST Fri Dec 24 2021

CAZ043-048-050-055>058-065-552-554-242115-
/O.EXP.KSGX.FA.A.0002.000000T0000Z-211224T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
San Diego County Coastal Areas-San Bernardino and Riverside County
Valleys-The Inland Empire-San Diego County Valleys-San Bernardino
County Mountains-Riverside County Mountains-Santa Ana Mountains and
Foothills-San Diego County Mountains-San Gorgonio Pass Near Banning-
Orange County Coastal Areas-Orange County Inland Areas-
Including the cities of Vista, Ontario, Santee, Idyllwild-Pine Cove, 
Fontana, Garden Grove, Fullerton, Orange, Banning, Santa Ana, 
National City, Riverside, Poway, Big Bear Lake, Oceanside, Big Bear 
City, Desert Hot Springs, San Diego, Lake Arrowhead, Irvine, El 
Cajon, Newport Beach, Escondido, Chula Vista, Crestline, San 
Clemente, Wrightwood, Corona, Anaheim, Huntington Beach, San 
Bernardino, Moreno Valley, Mission Viejo, Laguna Beach, Julian, Pine 
Valley, Costa Mesa, La Mesa, Encinitas, Running Springs, San Marcos, 
Carlsbad, and Rancho Cucamonga
1202 PM PST Fri Dec 24 2021

...FLOOD WATCH HAS EXPIRED...

The Flood Watch has expired for a portion of Southern California, 
including the following areas, 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 Diego County Coastal Areas, San Diego County 
Mountains, San Diego County Valleys, San Gorgonio Pass Near Banning 
and Santa Ana Mountains and Foothills.

The flooding threat has ended. Therefore, the Flood Watch has 
expired.

$$

Maxwell

Nearby

Flood Watches in California, 2021Every flood watch in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.