Alert archive / California / Flood Watches in 2025
Flood Watch 9, NWS Eureka, CA
NWS Eureka, CA issued this flood watch at Dec 19, 2025, 11:25 AM PST for 5 counties in California. It took effect at Dec 20, 2025, 4:00 PM PST. It was in force for 34 hr.
The area
The counties it named.
The facts
- Issued
- Dec 19, 2025, 11:25 AM PST (19:25 UTC)
- In effect from
- Dec 20, 2025, 4:00 PM PST
- Expired
- Dec 22, 2025, 2:22 AM PST
- In force
- 34 hr
- Issued by
- NWS Eureka, CA
- Flood severity
- None
Counties Del Norte County, CA, Humboldt County, CA, Lake County, CA, Mendocino County, CA, Trinity County, CA
The radar
The Eureka (Bunker Hill) radar (KBHX), 75 km from the middle of the area, began a volume at 19:28 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
Oakland, CA (KOAK), launched 12:00Z, 7.4 hours before the alert went out and 308 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 474 m above ground
- 0-6 km bulk shear
- 66 kt
- 0-1 km storm-relative helicity
- 112 m²/s²
- 0-3 km storm-relative helicity
- 183 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
380
WGUS66 KEKA 191925
FFAEKA
URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Eureka CA
1125 AM PST Fri Dec 19 2025
CAZ109>115-200330-
/O.NEW.KEKA.FA.A.0009.251221T0000Z-251223T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mendocino Coast-Northwestern Mendocino Interior-Northeastern
Mendocino Interior-Southwestern Mendocino Interior-Southeastern
Mendocino Interior-Northern Lake-Southern Lake-
1125 AM PST Fri Dec 19 2025
...FLOOD WATCH IN EFFECT FROM SATURDAY AFTERNOON THROUGH MONDAY
AFTERNOON...
* WHAT...Flooding caused by excessive rainfall is possible.
* WHERE...A portion of northwest California, including the following
areas, Mendocino Coast, Northeastern Mendocino Interior, Northern
Lake, Northwestern Mendocino Interior, Southeastern Mendocino
Interior, Southern Lake and Southwestern Mendocino Interior.
* WHEN...From Saturday afternoon through Monday afternoon.
* IMPACTS...There will be an increased risk of rock and land slides
along roadways. Excessive runoff may result in flooding of creeks,
streams, and other low-lying and flood-prone locations.
* ADDITIONAL DETAILS...
- An atmospheric river will move into Mendocino and Lake Counties
starting Saturday afternoon and continue into Monday. Periods of
moderate to heavy rain with rates of a quarter to a half inch are
possible. Total rain amounts of 3-6 inches are forecast. Rises in
creeks and streams are likely and could result in minor flooding
impacts. Flooding may occur in poor drainage and urban areas.
- 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.
&&
$$
CAZ103>106-192100-
/O.CON.KEKA.FA.A.0008.000000T0000Z-251219T2100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Northern Humboldt Coast-Southwestern Humboldt-Northern Humboldt
Interior-Southern Humboldt Interior-
1125 AM PST Fri Dec 19 2025
...FLOOD WATCH REMAINS IN EFFECT UNTIL 1 PM PST THIS AFTERNOON...
* WHAT...Flooding caused by excessive rainfall continues to be
possible.
* WHERE...A portion of northwest California, including the following
areas, Northern Humboldt Coast, Northern Humboldt Interior,
Southern Humboldt Interior and Southwestern Humboldt.
* WHEN...Until 1 PM PST this afternoon.
* IMPACTS...There will be an increased risk of rock and land slides
along roadways. Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Creeks and streams may rise out of their banks. Flooding may occur
in poor drainage and urban areas.
* ADDITIONAL DETAILS...
- The frontal system has produced 2-4 inches of rain in the higher
terrain and 1-2 inches in the lower elevations. Small streams are
responding to this increase even as rain rates gradually
diminish.
- http://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be alert for possible Flood
Warnings. Those living in areas prone to flooding should be prepared
to take action should flooding develop.
&&
$$
JB13 follow-up statements
418
WGUS66 KEKA 192042
FFAEKA
Flood Watch
National Weather Service Eureka CA
1242 PM PST Fri Dec 19 2025
CAZ103>106-192145-
/O.EXP.KEKA.FA.A.0008.000000T0000Z-251219T2100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Northern Humboldt Coast-Southwestern Humboldt-Northern Humboldt
Interior-Southern Humboldt Interior-
1242 PM PST Fri Dec 19 2025
...FLOOD WATCH WILL EXPIRE AT 1 PM PST THIS AFTERNOON...
The Flood Watch will expire for a portion of northwest California,
including the following areas, Northern Humboldt Coast, Northern
Humboldt Interior, Southern Humboldt Interior and Southwestern
Humboldt.
The flooding threat has ended. Therefore, the Flood Watch will expire
at 1 PM PST this afternoon.
$$
CAZ109>115-200445-
/O.CON.KEKA.FA.A.0009.251221T0000Z-251223T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mendocino Coast-Northwestern Mendocino Interior-Northeastern
Mendocino Interior-Southwestern Mendocino Interior-Southeastern
Mendocino Interior-Northern Lake-Southern Lake-
1242 PM PST Fri Dec 19 2025
...FLOOD WATCH REMAINS IN EFFECT FROM SATURDAY AFTERNOON THROUGH
MONDAY AFTERNOON...
* WHAT...Flooding caused by excessive rainfall continues to be
possible.
* WHERE...A portion of northwest California, including the following
areas, Mendocino Coast, Northeastern Mendocino Interior, Northern
Lake, Northwestern Mendocino Interior, Southeastern Mendocino
Interior, Southern Lake and Southwestern Mendocino Interior.
* WHEN...From Saturday afternoon through Monday afternoon.
* IMPACTS...There will be an increased risk of rock and land slides
along roadways. Excessive runoff may result in flooding of creeks,
streams, and other low-lying and flood-prone locations.
* ADDITIONAL DETAILS...
- An atmospheric river will move into Mendocino and Lake Counties
starting Saturday afternoon and continue into Monday. Periods of
moderate to heavy rain with rates of a quarter to a half inch are
possible. Total rain amounts of 3-6 inches are forecast. Rises in
creeks and streams are likely and could result in minor flooding
impacts. Flooding may occur in poor drainage and urban areas.
- http://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be alert for possible Flood
Warnings. Those living in areas prone to flooding should be prepared
to take action should flooding develop.
&&
$$
ZVS912
WGUS66 KEKA 200426
FFAEKA
Flood Watch
National Weather Service Eureka CA
826 PM PST Fri Dec 19 2025
CAZ109>115-201230-
/O.CON.KEKA.FA.A.0009.251221T0000Z-251223T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mendocino Coast-Northwestern Mendocino Interior-Northeastern
Mendocino Interior-Southwestern Mendocino Interior-Southeastern
Mendocino Interior-Northern Lake-Southern Lake-
826 PM PST Fri Dec 19 2025
...FLOOD WATCH REMAINS IN EFFECT FROM SATURDAY AFTERNOON THROUGH
MONDAY AFTERNOON...
* WHAT...Flooding caused by excessive rainfall continues to be
possible.
* WHERE...A portion of northwest California, including the following
areas, Mendocino Coast, Northeastern Mendocino Interior, Northern
Lake, Northwestern Mendocino Interior, Southeastern Mendocino
Interior, Southern Lake and Southwestern Mendocino Interior.
* WHEN...From Saturday afternoon through Monday afternoon.
* IMPACTS...There will be an increased risk of rock and land slides
along roadways. Excessive runoff may result in flooding of creeks,
streams, and other low-lying and flood-prone locations.
* ADDITIONAL DETAILS...
- An atmospheric river will move into Mendocino and Lake Counties
starting Saturday afternoon and continue into Monday. Periods of
moderate to heavy rain with rates of a quarter to a half inch are
possible. Total rain amounts of 3-6 inches are forecast. Rises in
creeks and streams are likely and could result in minor flooding
impacts. Flooding may occur in poor drainage and urban areas.
- 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.
&&
$$
MKK877
WGUS66 KEKA 200722
FFAEKA
URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Eureka CA
1122 PM PST Fri Dec 19 2025
CAZ108-201530-
/O.EXB.KEKA.FA.A.0009.251221T0000Z-251222T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Southern Trinity-
1122 PM PST Fri Dec 19 2025
...FLOOD WATCH IN EFFECT FROM SATURDAY AFTERNOON THROUGH LATE SUNDAY
NIGHT...
* WHAT...Flooding caused by excessive rainfall continues to be
possible.
* WHERE...A portion of northwest California, including the following
area, Southern Trinity.
* WHEN...From Saturday afternoon through late Sunday night.
* IMPACTS...There will be an increased risk of rock and land slides
along roadways.
* ADDITIONAL DETAILS...
- An atmospheric river will move into Mendocino and Lake Counties
starting Saturday afternoon and continue into Monday. Periods of
moderate to heavy rain with rates of a quarter to a half inch are
possible. Total rain amounts of 3-6 inches are forecast. Rises in
creeks and streams are likely and could result in minor flooding
impacts. Flooding may occur in poor drainage and urban areas.
- http://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be alert for possible Flood
Warnings. Those living in areas prone to flooding should be prepared
to take action should flooding develop.
&&
$$
CAZ109>115-201530-
/O.EXT.KEKA.FA.A.0009.251221T0000Z-251223T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mendocino Coast-Northwestern Mendocino Interior-Northeastern
Mendocino Interior-Southwestern Mendocino Interior-Southeastern
Mendocino Interior-Northern Lake-Southern Lake-
1122 PM PST Fri Dec 19 2025
...FLOOD WATCH NOW IN EFFECT FROM SATURDAY AFTERNOON THROUGH TUESDAY
MORNING...
* WHAT...Flooding caused by excessive rainfall continues to be
possible.
* WHERE...A portion of northwest California, including Mendocino and
Lake counties.
* WHEN...From Saturday afternoon through Tuesday morning.
* IMPACTS...There will be an increased risk of rock and land slides
along roadways. Excessive runoff may result in flooding of creeks,
streams, and other low-lying and flood-prone locations.
* ADDITIONAL DETAILS...
- An atmospheric river will move into Mendocino and Lake Counties
starting Saturday afternoon and continue into Monday. Periods of
moderate to heavy rain with rates of a quarter to a half inch are
possible. Total rain amounts of 3-6 inches are forecast. Rises in
creeks and streams are likely and could result in minor flooding
impacts. Flooding may occur in poor drainage and urban areas.
- 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.
&&
$$
MKK018
WGUS66 KEKA 200810
FFAEKA
URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Eureka CA
1210 AM PST Sat Dec 20 2025
CAZ109>115-201615-
/O.EXT.KEKA.FA.A.0009.251221T0000Z-251222T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mendocino Coast-Northwestern Mendocino Interior-Northeastern
Mendocino Interior-Southwestern Mendocino Interior-Southeastern
Mendocino Interior-Northern Lake-Southern Lake-
1210 AM PST Sat Dec 20 2025
...FLOOD WATCH NOW IN EFFECT FROM THIS AFTERNOON THROUGH MONDAY
MORNING...
* WHAT...Flooding caused by excessive rainfall continues to be
possible.
* WHERE...A portion of northwest California, including the following
areas, Mendocino Coast, Northeastern Mendocino Interior, Northern
Lake, Northwestern Mendocino Interior, Southeastern Mendocino
Interior, Southern Lake and Southwestern Mendocino Interior.
* WHEN...From this afternoon through Monday morning.
* IMPACTS...There will be an increased risk of rock and land slides
along roadways. Excessive runoff may result in flooding of creeks,
streams, and other low-lying and flood-prone locations.
* ADDITIONAL DETAILS...
- An atmospheric river will move into Mendocino and Lake Counties
starting Saturday afternoon and continue into Monday. Periods of
moderate to heavy rain with rates of a quarter to a half inch are
possible. Total rain amounts of 3-6 inches are forecast. Rises in
creeks and streams are likely and could result in minor flooding
impacts. Flooding may occur in poor drainage and urban areas.
- http://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be alert for possible Flood
Warnings. Those living in areas prone to flooding should be prepared
to take action should flooding develop.
&&
$$
CAZ108-201615-
/O.CON.KEKA.FA.A.0009.251221T0000Z-251222T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Southern Trinity-
1210 AM PST Sat Dec 20 2025
...FLOOD WATCH REMAINS IN EFFECT FROM THIS AFTERNOON THROUGH LATE
SUNDAY NIGHT...
* WHAT...Flooding caused by excessive rainfall continues to be
possible.
* WHERE...A portion of northwest California, including the following
area, Southern Trinity.
* WHEN...From this afternoon through late Sunday night.
* IMPACTS...There will be an increased risk of rock and land slides
along roadways.
* ADDITIONAL DETAILS...
- An atmospheric river will move into Mendocino and Lake Counties
starting Saturday afternoon and continue into Monday. Periods of
moderate to heavy rain with rates of a quarter to a half inch are
possible. Total rain amounts of 3-6 inches are forecast. Rises in
creeks and streams are likely and could result in minor flooding
impacts. Flooding may occur in poor drainage and urban areas.
- 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.
&&
$$
MKK901
WGUS66 KEKA 201600
FFAEKA
Flood Watch
National Weather Service Eureka CA
800 AM PST Sat Dec 20 2025
CAZ109>115-210000-
/O.CON.KEKA.FA.A.0009.251221T0000Z-251222T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mendocino Coast-Northwestern Mendocino Interior-Northeastern
Mendocino Interior-Southwestern Mendocino Interior-Southeastern
Mendocino Interior-Northern Lake-Southern Lake-
800 AM PST Sat Dec 20 2025
...FLOOD WATCH REMAINS IN EFFECT FROM 4 PM PST THIS AFTERNOON THROUGH
MONDAY MORNING...
* WHAT...Flooding caused by excessive rainfall continues to be
possible.
* WHERE...A portion of northwest California, including the following
areas, Mendocino Coast, Northeastern Mendocino Interior, Northern
Lake, Northwestern Mendocino Interior, Southeastern Mendocino
Interior, Southern Lake and Southwestern Mendocino Interior.
* WHEN...From 4 PM PST this afternoon through Monday morning.
* IMPACTS...There will be an increased risk of rock and land slides
along roadways. Excessive runoff may result in flooding of creeks,
streams, and other low-lying and flood-prone locations.
* ADDITIONAL DETAILS...
- An atmospheric river will move into Mendocino and Lake Counties
starting this afternoon and continue into Monday. Periods of
moderate to heavy rain with rates of a quarter to a half inch are
possible. Total rain amounts of 3-6 inches are forecast. Rises in
creeks and streams are likely and could result in minor flooding
impacts. Flooding may occur in poor drainage and urban areas.
- http://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be alert for possible Flood
Warnings. Those living in areas prone to flooding should be prepared
to take action should flooding develop.
&&
$$
CAZ108-210000-
/O.CON.KEKA.FA.A.0009.251221T0000Z-251222T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Southern Trinity-
800 AM PST Sat Dec 20 2025
...FLOOD WATCH REMAINS IN EFFECT FROM 4 PM PST THIS AFTERNOON THROUGH
LATE SUNDAY NIGHT...
* WHAT...Flooding caused by excessive rainfall continues to be
possible.
* WHERE...A portion of northwest California, including the following
area, Southern Trinity.
* WHEN...From 4 PM PST this afternoon through late Sunday night.
* IMPACTS...There will be an increased risk of rock and land slides
along roadways.
* ADDITIONAL DETAILS...
- An atmospheric river will move into Mendocino and Lake Counties
starting this afternoon and continue into Monday. Periods of
moderate to heavy rain with rates of a quarter to a half inch are
possible. Total rain amounts of 3-6 inches are forecast. Rises in
creeks and streams are likely and could result in minor flooding
impacts. Flooding may occur in poor drainage and urban areas.
- 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.
&&
$$
JB529
WGUS66 KEKA 202351
FFAEKA
Flood Watch
National Weather Service Eureka CA
351 PM PST Sat Dec 20 2025
CAZ109>115-211200-
/O.CON.KEKA.FA.A.0009.251221T0000Z-251222T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mendocino Coast-Northwestern Mendocino Interior-Northeastern
Mendocino Interior-Southwestern Mendocino Interior-Southeastern
Mendocino Interior-Northern Lake-Southern Lake-
351 PM PST Sat Dec 20 2025
...FLOOD WATCH REMAINS IN EFFECT THROUGH MONDAY MORNING...
* WHAT...Flooding caused by excessive rainfall continues to be
possible.
* WHERE...A portion of northwest California, including the following
areas, Mendocino Coast, Northeastern Mendocino Interior, Northern
Lake, Northwestern Mendocino Interior, Southeastern Mendocino
Interior, Southern Lake and Southwestern Mendocino Interior.
* WHEN...Through Monday morning.
* IMPACTS...There will be an increased risk of rock and land slides
along roadways. Excessive runoff may result in flooding of creeks,
streams, and other low-lying and flood-prone locations.
* ADDITIONAL DETAILS...
- An atmospheric river will move into Mendocino and Lake Counties
starting this afternoon and continue into Monday. Periods of
moderate to heavy rain with rates of a quarter to a half inch are
possible. Total rain amounts of 3-6 inches are forecast. Rises in
creeks and streams are likely and could result in minor flooding
impacts. Flooding may occur in poor drainage and urban areas.
- http://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be alert for possible Flood
Warnings. Those living in areas prone to flooding should be prepared
to take action should flooding develop.
&&
$$
CAZ108-211200-
/O.CON.KEKA.FA.A.0009.251221T0000Z-251222T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Southern Trinity-
351 PM PST Sat Dec 20 2025
...FLOOD WATCH REMAINS IN EFFECT THROUGH LATE SUNDAY NIGHT...
* WHAT...Flooding caused by excessive rainfall continues to be
possible.
* WHERE...A portion of northwest California, including the following
area, Southern Trinity.
* WHEN...Through late Sunday night.
* IMPACTS...There will be an increased risk of rock and land slides
along roadways.
* ADDITIONAL DETAILS...
- An atmospheric river will move into Mendocino and Lake Counties
starting this afternoon and continue into Monday. Periods of
moderate to heavy rain with rates of a quarter to a half inch are
possible. Total rain amounts of 3-6 inches are forecast. Rises in
creeks and streams are likely and could result in minor flooding
impacts. Flooding may occur in poor drainage and urban areas.
- 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.
&&
$$
EYS216
WGUS66 KEKA 210408
FFAEKA
URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Eureka CA
808 PM PST Sat Dec 20 2025
CAZ103>106-211215-
/O.EXB.KEKA.FA.A.0009.251221T0900Z-251222T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Northern Humboldt Coast-Southwestern Humboldt-Northern Humboldt
Interior-Southern Humboldt Interior-
808 PM PST Sat Dec 20 2025
...FLOOD WATCH IN EFFECT FROM 1 AM PST SUNDAY THROUGH SUNDAY
EVENING...
* WHAT...Flooding caused by excessive rainfall continues to be
possible.
* WHERE...Humboldt County.
* WHEN...From 1 AM PST Sunday through Sunday evening.
* IMPACTS...There will be an increased risk of rock and land slides
along roadways. Creeks and streams may rise out of their banks.
Flooding may occur in poor drainage and urban areas.
* ADDITIONAL DETAILS...
- An atmospheric river will move into northwest California tonight
through Sunday evening. Periods of moderate to heavy rain with
rates of a quarter to a half inch an hour are possible. Total
rain amounts of 2-5 inches are forecast. Rises in creeks and
streams are likely and could result in minor flooding impacts.
Flooding may occur in poor drainage and urban areas.
- This may include flooding on old Arcata road, Crannel Road and
Elk River road among other areas that typically flood.
- http://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be alert for possible Flood
Warnings. Those living in areas prone to flooding should be prepared
to take action should flooding develop.
&&
$$
CAZ109>115-211215-
/O.CON.KEKA.FA.A.0009.000000T0000Z-251222T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mendocino Coast-Northwestern Mendocino Interior-Northeastern
Mendocino Interior-Southwestern Mendocino Interior-Southeastern
Mendocino Interior-Northern Lake-Southern Lake-
808 PM PST Sat Dec 20 2025
...FLOOD WATCH REMAINS IN EFFECT THROUGH MONDAY MORNING...
* WHAT...Flooding caused by excessive rainfall continues to be
possible.
* WHERE...Mendocino and Lake counties.
* WHEN...Through Monday morning.
* IMPACTS...There will be an increased risk of rock and land slides
along roadways. 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 move into northwest California tonight
through Sunday evening. Periods of moderate to heavy rain with
rates of a quarter to a half inch an hour are possible. Total
rain amounts of 3-6 inches are forecast. Rises in creeks and
streams are likely and could result in minor flooding impacts.
Flooding may occur in poor drainage and urban areas.
- This may include Hwy 1 near the Garcia river north of Point
Arena.
- 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.
&&
$$
CAZ108-211215-
/O.CON.KEKA.FA.A.0009.000000T0000Z-251222T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Southern Trinity-
808 PM PST Sat Dec 20 2025
...FLOOD WATCH REMAINS IN EFFECT THROUGH LATE SUNDAY NIGHT...
* WHAT...Flooding caused by excessive rainfall continues to be
possible.
* WHERE...A portion of northwest California, including the following
area, Southern Trinity.
* WHEN...Through late Sunday night.
* IMPACTS...There will be an increased risk of rock and land slides
along roadways.
* ADDITIONAL DETAILS...
- An atmospheric river will move into northwest California tonight
through Sunday evening. Periods of moderate to heavy rain with
rates of a quarter to a half inch an hour are possible. Total
rain amounts of 3-6 inches are forecast. Rises in creeks and
streams are likely and could result in minor flooding impacts.
Flooding may occur in poor drainage and urban areas.
- http://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be alert for possible Flood
Warnings. Those living in areas prone to flooding should be prepared
to take action should flooding develop.
&&
$$
MKK892
WGUS66 KEKA 210746
FFAEKA
Flood Watch
National Weather Service Eureka CA
1146 PM PST Sat Dec 20 2025
CAZ109>115-211600-
/O.CON.KEKA.FA.A.0009.000000T0000Z-251222T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mendocino Coast-Northwestern Mendocino Interior-Northeastern
Mendocino Interior-Southwestern Mendocino Interior-Southeastern
Mendocino Interior-Northern Lake-Southern Lake-
1146 PM PST Sat Dec 20 2025
...FLOOD WATCH REMAINS IN EFFECT THROUGH MONDAY MORNING...
* WHAT...Flooding caused by excessive rainfall continues to be
possible.
* WHERE...Mendocino and Lake counties.
* WHEN...Through Monday morning.
* IMPACTS...There will be an increased risk of rock and land slides
along roadways. Excessive runoff may result in flooding of creeks,
streams, and other low-lying and flood-prone locations.
* ADDITIONAL DETAILS...
- An atmospheric river will move into northwest California tonight
through Sunday evening. Periods of moderate to heavy rain with
rates of a quarter to a half inch an hour are possible. Total
rain amounts of 3-6 inches are forecast. Rises in creeks and
streams are likely and could result in minor flooding impacts.
Flooding may occur in poor drainage and urban areas.
- This may include Hwy 1 near the Garcia river north of Point
Arena.
- 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.
&&
$$
CAZ108-211600-
/O.CON.KEKA.FA.A.0009.000000T0000Z-251222T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Southern Trinity-
1146 PM PST Sat Dec 20 2025
...FLOOD WATCH REMAINS IN EFFECT THROUGH LATE SUNDAY NIGHT...
* WHAT...Flooding caused by excessive rainfall continues to be
possible.
* WHERE...A portion of northwest California, including the following
area, Southern Trinity.
* WHEN...Through late Sunday night.
* IMPACTS...There will be an increased risk of rock and land slides
along roadways.
* ADDITIONAL DETAILS...
- An atmospheric river will move into northwest California tonight
through Sunday evening. Periods of moderate to heavy rain with
rates of a quarter to a half inch an hour are possible. Total
rain amounts of 3-6 inches are forecast. Rises in creeks and
streams are likely and could result in minor flooding impacts.
Flooding may occur in poor drainage and urban areas.
- http://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be alert for possible Flood
Warnings. Those living in areas prone to flooding should be prepared
to take action should flooding develop.
&&
$$
CAZ103>106-211600-
/O.CON.KEKA.FA.A.0009.251221T0900Z-251222T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Northern Humboldt Coast-Southwestern Humboldt-Northern Humboldt
Interior-Southern Humboldt Interior-
1146 PM PST Sat Dec 20 2025
...FLOOD WATCH REMAINS IN EFFECT THROUGH SUNDAY EVENING...
* WHAT...Flooding caused by excessive rainfall continues to be
possible.
* WHERE...Humboldt County.
* WHEN...Through Sunday evening.
* IMPACTS...There will be an increased risk of rock and land slides
along roadways. Creeks and streams may rise out of their banks.
Flooding may occur in poor drainage and urban areas.
* ADDITIONAL DETAILS...
- An atmospheric river will move into northwest California tonight
through Sunday evening. Periods of moderate to heavy rain with
rates of a quarter to a half inch an hour are possible. Total
rain amounts of 2-5 inches are forecast. Rises in creeks and
streams are likely and could result in minor flooding impacts.
Flooding may occur in poor drainage and urban areas.
- This may include flooding on old Arcata road, Crannel Road and
Elk River road among other areas that typically flood.
- 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.
&&
$$
MKK543
WGUS66 KEKA 211005
FFAEKA
URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Eureka CA
205 AM PST Sun Dec 21 2025
CAZ101-102-211900-
/O.EXB.KEKA.FA.A.0009.000000T0000Z-251222T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Coastal Del Norte-Del Norte Interior-
205 AM PST Sun Dec 21 2025
...FLOOD WATCH IN EFFECT THROUGH THIS EVENING...
* WHAT...Flooding caused by excessive rainfall continues to be
possible.
* WHERE...Del Norte County
* WHEN...Through this evening.
* IMPACTS...There will be an increased risk of rock and land slides
along roadways. Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Area creeks and streams are running high and could flood with more
heavy rain.
* ADDITIONAL DETAILS...
- A quick moving cold front will bring moderate to heavy rain to
the area tonight into late Friday morning. Rainfall totals of 2-4
inches and rainfall rates up to 0.5 inches or higher an hour are
possible. Saturated soils and the heavy rainfall rates will
increase the risk of minor flooding impacts to low lying and
urban areas. Rises in creeks and streams are likely.
- http://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be alert for possible Flood
Warnings. Those living in areas prone to flooding should be prepared
to take action should flooding develop.
&&
$$
CAZ107-211900-
/O.EXA.KEKA.FA.A.0009.000000T0000Z-251222T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Northern Trinity-
205 AM PST Sun Dec 21 2025
...FLOOD WATCH IN EFFECT THROUGH THIS EVENING...
* WHAT...Flooding caused by excessive rainfall continues to be
possible.
* WHERE...A portion of northwest California, including the following
area, Northern Trinity.
* WHEN...Through this evening.
* IMPACTS...There will be an increased risk of rock and land slides
along roadways. Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Creeks and streams may rise out of their banks. Area creeks and
streams are running high and could flood with more heavy rain.
* ADDITIONAL DETAILS...
- totals of 2-4 inches and rainfall rates up to 0.5 inches or
higher an hour are possible. Saturated soils and the heavy
rainfall rates will increase the risk of minor flooding impacts.
Rises in creeks and streams are likely.
- 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.
&&
$$
CAZ109>115-211900-
/O.CON.KEKA.FA.A.0009.000000T0000Z-251222T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mendocino Coast-Northwestern Mendocino Interior-Northeastern
Mendocino Interior-Southwestern Mendocino Interior-Southeastern
Mendocino Interior-Northern Lake-Southern Lake-
205 AM PST Sun Dec 21 2025
...FLOOD WATCH REMAINS IN EFFECT THROUGH MONDAY MORNING...
* WHAT...Flooding caused by excessive rainfall continues to be
possible.
* WHERE...Mendocino and Lake counties.
* WHEN...Through Monday morning.
* IMPACTS...There will be an increased risk of rock and land slides
along roadways. Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Flooding may occur in poor drainage and urban areas.
* ADDITIONAL DETAILS...
- An atmospheric river will move into northwest California tonight
through Sunday evening. Periods of moderate to heavy rain with
rates of a quarter to a half inch an hour are possible. Total
rain amounts of 3-6 inches are forecast. Rises in creeks and
streams are likely and could result in minor flooding impacts.
Flooding may occur in poor drainage and urban areas.
- This may include Hwy 1 near the Garcia river north of Point
Arena.
- http://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be alert for possible Flood
Warnings. Those living in areas prone to flooding should be prepared
to take action should flooding develop.
&&
$$
CAZ108-211900-
/O.CON.KEKA.FA.A.0009.000000T0000Z-251222T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Southern Trinity-
205 AM PST Sun Dec 21 2025
...FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TONIGHT...
* WHAT...Flooding caused by excessive rainfall continues to be
possible.
* WHERE...Southern Trinity County
* WHEN...Through late tonight.
* IMPACTS...There will be an increased risk of rock and land slides
along roadways.
* ADDITIONAL DETAILS...
- An atmospheric river will move into northwest California tonight
through Sunday evening. Periods of moderate to heavy rain with
rates of a quarter to a half inch an hour are possible. Total
rain amounts of 3-6 inches are forecast. Rises in creeks and
streams are likely and could result in minor flooding impacts.
Flooding may occur in poor drainage and urban areas.
- 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.
&&
$$
CAZ103>106-211900-
/O.CON.KEKA.FA.A.0009.000000T0000Z-251222T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Northern Humboldt Coast-Southwestern Humboldt-Northern Humboldt
Interior-Southern Humboldt Interior-
205 AM PST Sun Dec 21 2025
...FLOOD WATCH REMAINS IN EFFECT THROUGH THIS EVENING...
* WHAT...Flooding caused by excessive rainfall continues to be
possible.
* WHERE...Humboldt County.
* WHEN...Through this evening.
* IMPACTS...There will be an increased risk of rock and land slides
along roadways. Creeks and streams may rise out of their banks.
Flooding may occur in poor drainage and urban areas.
* ADDITIONAL DETAILS...
- An atmospheric river will move into northwest California tonight
through Sunday evening. Periods of moderate to heavy rain with
rates of a quarter to a half inch an hour are possible. Total
rain amounts of 2-5 inches are forecast. Rises in creeks and
streams are likely and could result in minor flooding impacts.
Flooding may occur in poor drainage and urban areas.
- http://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be alert for possible Flood
Warnings. Those living in areas prone to flooding should be prepared
to take action should flooding develop.
&&
$$
JJW544
WGUS66 KEKA 211827
FFAEKA
Flood Watch
National Weather Service Eureka CA
1027 AM PST Sun Dec 21 2025
CAZ109>115-220230-
/O.CON.KEKA.FA.A.0009.000000T0000Z-251222T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mendocino Coast-Northwestern Mendocino Interior-Northeastern
Mendocino Interior-Southwestern Mendocino Interior-Southeastern
Mendocino Interior-Northern Lake-Southern Lake-
1027 AM PST Sun Dec 21 2025
...FLOOD WATCH REMAINS IN EFFECT THROUGH MONDAY MORNING...
* WHAT...Flooding caused by excessive rainfall continues to be
possible.
* WHERE...A portion of northwest California, including the following
areas, Mendocino Coast, Northeastern Mendocino Interior, Northern
Lake, Northwestern Mendocino Interior, Southeastern Mendocino
Interior, Southern Lake and Southwestern Mendocino Interior.
* WHEN...Through Monday morning.
* IMPACTS...There will be an increased risk of rock and land slides
along roadways. Excessive runoff may result in flooding of creeks,
streams, and other low-lying and flood-prone locations.
* ADDITIONAL DETAILS...
- An atmospheric river will move into northwest California through
this evening. Periods of moderate to heavy rain with rates of a
quarter to a half of an inch per hour are possible. Total rain
amounts of 3-6 inches are forecast. Rises in creeks and streams
are likely and could result in minor flooding impacts. Flooding
may occur in poor drainage and urban areas.
- 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.
&&
$$
CAZ108-220230-
/O.CON.KEKA.FA.A.0009.000000T0000Z-251222T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Southern Trinity-
1027 AM PST Sun Dec 21 2025
...FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TONIGHT...
* WHAT...Flooding caused by excessive rainfall continues to be
possible.
* WHERE...Southern Trinity County
* WHEN...Through late tonight.
* IMPACTS...There will be an increased risk of rock and land slides
along roadways.
* ADDITIONAL DETAILS...
- An atmospheric river will move into northwest California through
this evening. Periods of moderate to heavy rain with rates of a
quarter to a half inch an hour are possible. Total rain amounts
of 3-6 inches are forecast. Rises in creeks and streams are
likely and could result in minor flooding impacts. Flooding may
occur in poor drainage and urban areas.
- http://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be alert for possible Flood
Warnings. Those living in areas prone to flooding should be prepared
to take action should flooding develop.
&&
$$
CAZ103>106-220230-
/O.CON.KEKA.FA.A.0009.000000T0000Z-251222T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Northern Humboldt Coast-Southwestern Humboldt-Northern Humboldt
Interior-Southern Humboldt Interior-
1027 AM PST Sun Dec 21 2025
...FLOOD WATCH REMAINS IN EFFECT UNTIL 10 PM PST THIS EVENING...
* WHAT...Flooding caused by excessive rainfall continues to be
possible.
* WHERE...Humboldt County.
* WHEN...Until 10 PM PST this evening.
* IMPACTS...There will be an increased risk of rock and land slides
along roadways. Creeks and streams may rise out of their banks.
Flooding may occur in poor drainage and urban areas.
* ADDITIONAL DETAILS...
- An atmospheric river will move into northwest California through
this evening. Periods of moderate to heavy rain with rates of a
quarter to a half inch an hour are possible. Total rain amounts
of 2-5 inches are forecast. Rises in creeks and streams are
likely and could result in minor flooding impacts. Flooding may
occur in poor drainage and urban areas.
- This may include flooding on old Arcata road, Crannel Road and
Elk River road among other areas that typically flood.
- 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.
&&
$$
CAZ101-102-220230-
/O.CON.KEKA.FA.A.0009.000000T0000Z-251222T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Coastal Del Norte-Del Norte Interior-
1027 AM PST Sun Dec 21 2025
...FLOOD WATCH REMAINS IN EFFECT UNTIL 7 PM PST THIS EVENING...
* WHAT...Flooding caused by excessive rainfall continues to be
possible.
* WHERE...Del Norte County
* WHEN...Until 7 PM PST this evening.
* IMPACTS...There will be an increased risk of rock and land slides
along roadways. Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Area creeks and streams are running high and could flood with more
heavy rain.
* ADDITIONAL DETAILS...
- A quick moving cold front will bring moderate to heavy rain to
the area tonight into late Friday morning. Rainfall totals of 2-4
inches and rainfall rates up to 0.5 inches or higher an hour are
possible. Saturated soils and the heavy rainfall rates will
increase the risk of minor flooding impacts to low lying and
urban areas. Rises in creeks and streams are likely.
- http://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be alert for possible Flood
Warnings. Those living in areas prone to flooding should be prepared
to take action should flooding develop.
&&
$$
CAZ107-220230-
/O.CON.KEKA.FA.A.0009.000000T0000Z-251222T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Northern Trinity-
1027 AM PST Sun Dec 21 2025
...FLOOD WATCH REMAINS IN EFFECT UNTIL 10 PM PST THIS EVENING...
* WHAT...Flooding caused by excessive rainfall continues to be
possible.
* WHERE...Southern Trinity County
* WHEN...Until 10 PM PST this evening.
* IMPACTS...There will be an increased risk of rock and land slides
along roadways. Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Creeks and streams may rise out of their banks. Area creeks and
streams are running high and could flood with more heavy rain.
* ADDITIONAL DETAILS...
- totals of 2-4 inches and rainfall rates up to 0.5 inches or
higher an hour are possible. Saturated soils and the heavy
rainfall rates will increase the risk of minor flooding impacts.
Rises in creeks and streams are likely.
- 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.
&&
$$
ZVS041
WGUS66 KEKA 220004
FFAEKA
Flood Watch
National Weather Service Eureka CA
404 PM PST Sun Dec 21 2025
CAZ101-102-220115-
/O.CAN.KEKA.FA.A.0009.000000T0000Z-251222T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Coastal Del Norte-Del Norte Interior-
404 PM PST Sun Dec 21 2025
...FLOOD WATCH IS CANCELLED...
The Flood Watch is cancelled for a portion of northwest California,
including the following areas, Coastal Del Norte and Del Norte
Interior.
Flooding is no longer expected to pose a threat. Please continue to
heed remaining road closures.
$$
CAZ109>115-220815-
/O.CON.KEKA.FA.A.0009.000000T0000Z-251222T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mendocino Coast-Northwestern Mendocino Interior-Northeastern
Mendocino Interior-Southwestern Mendocino Interior-Southeastern
Mendocino Interior-Northern Lake-Southern Lake-
404 PM PST Sun Dec 21 2025
...FLOOD WATCH REMAINS IN EFFECT THROUGH MONDAY MORNING...
* WHAT...Flooding caused by excessive rainfall continues to be
possible.
* WHERE...Mendocino and Lake counties.
* WHEN...Through Monday morning.
* IMPACTS...There will be an increased risk of rock and land slides
along roadways. Excessive runoff may result in flooding of creeks,
streams, and other low-lying and flood-prone locations.
* ADDITIONAL DETAILS...
- An atmospheric river will move into northwest California through
this evening. Periods of moderate to heavy rain with rates of a
quarter to a half of an inch per hour are possible. Total rain
amounts of 3-6 inches are forecast. Rises in creeks and streams
are likely and could result in minor flooding impacts. Flooding
may occur in poor drainage and urban areas.
- This may include Hwy 1 near the Garcia river north of Point
Arena.
- 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.
&&
$$
CAZ108-220815-
/O.CON.KEKA.FA.A.0009.000000T0000Z-251222T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Southern Trinity-
404 PM PST Sun Dec 21 2025
...FLOOD WATCH REMAINS IN EFFECT UNTIL 4 AM PST MONDAY...
* WHAT...Flooding caused by excessive rainfall continues to be
possible.
* WHERE...Southern Trinity County
* WHEN...Until 4 AM PST Monday.
* IMPACTS...There will be an increased risk of rock and land slides
along roadways.
* ADDITIONAL DETAILS...
- An atmospheric river will move into northwest California through
this evening. Periods of moderate to heavy rain with rates of a
quarter to a half inch an hour are possible. Total rain amounts
of 3-6 inches are forecast. Rises in creeks and streams are
likely and could result in minor flooding impacts. Flooding may
occur in poor drainage and urban areas.
- http://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be alert for possible Flood
Warnings. Those living in areas prone to flooding should be prepared
to take action should flooding develop.
&&
$$
CAZ103>106-220600-
/O.CON.KEKA.FA.A.0009.000000T0000Z-251222T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Northern Humboldt Coast-Southwestern Humboldt-Northern Humboldt
Interior-Southern Humboldt Interior-
404 PM PST Sun Dec 21 2025
...FLOOD WATCH REMAINS IN EFFECT UNTIL 10 PM PST THIS EVENING...
* WHAT...Flooding caused by excessive rainfall continues to be
possible.
* WHERE...Humboldt County.
* WHEN...Until 10 PM PST this evening.
* IMPACTS...There will be an increased risk of rock and land slides
along roadways. Creeks and streams may rise out of their banks.
Flooding may occur in poor drainage and urban areas.
* ADDITIONAL DETAILS...
- An atmospheric river will move into northwest California through
this evening. Periods of moderate to heavy rain with rates of a
quarter to a half inch an hour are possible. Total rain amounts
of 2-5 inches are forecast. Rises in creeks and streams are
likely and could result in minor flooding impacts. Flooding may
occur in poor drainage and urban areas.
- This may include flooding on old Arcata road, Crannel Road and
Elk River road among other areas that typically flood.
- 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.
&&
$$
CAZ107-220600-
/O.CON.KEKA.FA.A.0009.000000T0000Z-251222T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Northern Trinity-
404 PM PST Sun Dec 21 2025
...FLOOD WATCH REMAINS IN EFFECT UNTIL 10 PM PST THIS EVENING...
* WHAT...Flooding caused by excessive rainfall continues to be
possible.
* WHERE...Southern Trinity County
* WHEN...Until 10 PM PST this evening.
* IMPACTS...There will be an increased risk of rock and land slides
along roadways. Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Creeks and streams may rise out of their banks. Area creeks and
streams are running high and could flood with more heavy rain.
* ADDITIONAL DETAILS...
- totals of 2-4 inches and rainfall rates up to 0.5 inches or
higher an hour are possible. Saturated soils and the heavy
rainfall rates will increase the risk of minor flooding impacts.
Rises in creeks and streams are likely.
- http://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be alert for possible Flood
Warnings. Those living in areas prone to flooding should be prepared
to take action should flooding develop.
&&
$$397 WGUS66 KEKA 220559 FFAEKA Flood Watch National Weather Service Eureka CA 959 PM PST Sun Dec 21 2025 CAZ103>107-220700- /O.EXP.KEKA.FA.A.0009.000000T0000Z-251222T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Northern Humboldt Coast-Southwestern Humboldt-Northern Humboldt Interior-Southern Humboldt Interior-Northern Trinity- 959 PM PST Sun Dec 21 2025 ...FLOOD WATCH WILL EXPIRE AT 10 PM PST THIS EVENING... The Flood Watch will expire for a portion of northwest California, including the following areas, Northern Humboldt Coast, Northern Humboldt Interior, Northern Trinity, Southern Humboldt Interior and Southwestern Humboldt. The flooding threat is diminishing. Therefore, the Flood Watch will expire at 10 PM PST this evening. $$ CAZ109>115-221400- /O.CON.KEKA.FA.A.0009.000000T0000Z-251222T1700Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Mendocino Coast-Northwestern Mendocino Interior-Northeastern Mendocino Interior-Southwestern Mendocino Interior-Southeastern Mendocino Interior-Northern Lake-Southern Lake- 959 PM PST Sun Dec 21 2025 ...FLOOD WATCH REMAINS IN EFFECT UNTIL 9 AM PST MONDAY... * WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...Mendocino and Lake counties. * WHEN...Until 9 AM PST Monday. * IMPACTS...There will be an increased risk of rock and land slides along roadways. Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas. * ADDITIONAL DETAILS... - Rainfall has diminished but flooding continues in some locations. - http://www.weather.gov/safety/flood PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop. && $$ CAZ108-221200- /O.CON.KEKA.FA.A.0009.000000T0000Z-251222T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Southern Trinity- 959 PM PST Sun Dec 21 2025 ...FLOOD WATCH REMAINS IN EFFECT UNTIL 4 AM PST MONDAY... * WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...A portion of northwest California, including the following area, Southern Trinity. * WHEN...Until 4 AM PST Monday. * IMPACTS...There will be an increased risk of rock and land slides along roadways. * ADDITIONAL DETAILS... - The heavier rain has ended, but some light rain continues. - 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. && $$ MKK
600 WGUS66 KEKA 221022 FFAEKA Flood Watch National Weather Service Eureka CA 222 AM PST Mon Dec 22 2025 CAZ108-221130- /O.CAN.KEKA.FA.A.0009.000000T0000Z-251222T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Southern Trinity- 222 AM PST Mon Dec 22 2025 ...FLOOD WATCH IS CANCELLED... The Flood Watch is cancelled for a portion of northwest California, including the following area, Southern Trinity. Flooding is no longer expected to pose a threat. Please continue to heed remaining road closures. $$ CAZ109>115-221130- /O.CAN.KEKA.FA.A.0009.000000T0000Z-251222T1700Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Mendocino Coast-Northwestern Mendocino Interior-Northeastern Mendocino Interior-Southwestern Mendocino Interior-Southeastern Mendocino Interior-Northern Lake-Southern Lake- 222 AM PST Mon Dec 22 2025 ...FLOOD WATCH IS CANCELLED... The Flood Watch is cancelled for a portion of northwest California, including the following areas, Mendocino Coast, Northeastern Mendocino Interior, Northern Lake, Northwestern Mendocino Interior, Southeastern Mendocino Interior, Southern Lake and Southwestern Mendocino Interior. Flooding is no longer expected to pose a threat. Please continue to heed remaining road closures. $$ JJW
What forecasters said that day
The local office's own words before this flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Eureka, CA wrote its last area forecast discussion before this flood watch went out at Dec 19, 12:22 AM PST, 11 hours 3 minutes earlier. Its key messages:
- Pacific storm track remains active with additional heavy rainfall and chances for strong southerly winds this weekend and through much of next week. -Flooding risk trends higher as more rounds of heavy rainfall occur over saturating grounds. -Focused areas of heavy rain and strong winds create a forecast challenge to pinpoint areas of greatest risk.
- Snow levels gradually drop by early next week, and could be as low as 3500 to 4500 ft by Wednesday.
Area forecast discussion, Dec 19, 12:22 AM PST, 11 hours 3 minutes before
AREA FORECAST DISCUSSION
National Weather Service Eureka CA
1222 AM PST Fri Dec 19 2025
.SYNOPSIS...Moderate to heavy rainfall will taper off to the south
through Friday afternoon. More heavy rainfall returns Sunday. An
active storm track will bring additional heavy rainfall and a
flooding threat, strong winds, and lowering snow levels much of
next week.
&&
.KEY MESSAGES...
- Pacific storm track remains active with additional heavy
rainfall and chances for strong southerly winds this weekend
and through much of next week.
-Flooding risk trends higher as more rounds of heavy rainfall
occur over saturating grounds.
-Focused areas of heavy rain and strong winds create a forecast
challenge to pinpoint areas of greatest risk.
- Snow levels gradually drop by early next week, and could be as low
as 3500 to 4500 ft by Wednesday.
&&
.DISCUSSION...The threat for sharp rises in creeks and streams
will diminish this afternoon as rainfall turns light. Winds in
excess of 50 mph have been recorded at coastal Del Norte and the
prominent exposed headlands and ridgetops.
Widespread moderate to heavy rainfall rates up to 0.5 inch per
hour will continue to move from north to across the region
Friday. The threat for minor flooding will exist from this
rainfall. By early Friday afternoon the last of the moderate to
heavy rainfall will pull south of Lake County.
The persistent ridge that has been south of the region will then
eject east as a strong NE Pacific trough takes shape. Models
diverge on development of a new frontal wave and northward surge
of IVT ahead of the trough, but heavy rainfall looks to be focused
in more of a narrow band, and could become more persistent over
one area. It is likely that Lake and Mendocino will be in the
bullseye for this focus of moderate to locally heavy rain. The
precip max could easily shift northward Sunday as we have seen
many times before.
NBM 75th percentile 24 hour rainfall amounts Sunday are generally
2-3 inches north of Cape Mendocino, with 3 to over 4 inches south
of the Cape, including southern Trinity County. Currently, the
higher probabilities for over 4 inches in 24 hours is south of the
forecast area in Sonoma County. Looking at the ensembles, the
greater uncertainty is revealed. There is very high variability
for many locations in Mendocino and Lake County, which is expected
for more of a narrowly focused moisture plume. A narrow area of
very heavy rainfall rates of 0.4 to over 0.6 inch per hour may
develop. An additional Flood Watch will likely be issued to cover
this threat.
Going into early next week, ensemble guidance continues to keep the
storm door open, but the position of the systems are uncertain. Some
ensembles keep the bullseye to the south of the area towards the Bay
and some keep the bullseye in Mendocino and Lake Counties. A
potent shortwave trough or perhaps a compact closed low with
heavy rainfall and strong winds has been modeled to arrive around
Tuesday or into Wednesday. This system could pack strong winds,
possibly localized, as well as heavy rainfall. The exact location
and timing of this feature yields the ensemble uncertainty. There
is then the potential for a strong Pacific cyclone to imact N CA
late next week. If precipitation is near- continuous for several
days, more significant flooding impacts (such as main- stem rivers
nearing flood stage) are possible.
Snow levels remain high into the weekend and early next week. Snow
levels begin to fall going into early to mid next week, potentially
as low as 3500-4500 ft, which could bring us our first impactful
snow event to the higher mountain passes or even lower. Stay
tuned!
&&
.AVIATION...A cold front is bringing strong southerly winds to the
coastal areas and the higher ridges. There are stronger winds at a
couple thousand feet creating some wind shear This is also bringing
heavy rain with it and IFR to LIFR conditions. This is expected to
gradually shift south through the morning. Behind the front there is
expected to be a fairly dramatic shift of northwest winds, but these
will be much lighter, likely only around 10 to 15 kt. Friday night
fog is likely in the valleys again and UKI will likely be included
in this. The coast is expected to see some light offshore flow and
this may clear skies out. MKK
&&
.MARINE...A cold front moving through the waters is bringing near
gale to gale force southerly winds. This is building wind waves as
well. The front is expected to move past the area before sunrise in
the north and by midday in the south. Winds will quickly become
northwesterly behind the front, but remain only 5 to 15 kt. A west
to northwest swell is also building in this morning to around 10
feet at 11 seconds. This will slowly diminish on Saturday.
Another weather system is expected on Sunday but there is wide
variability in the model solutions. The models are currently
struggling to resolve a strong area of low pressure and where it
will exactly track. The NAM is now showing weaker winds more like
the GFS. Confidence is still low on this so blended the NBM with the
90th percentile of the NBM. This yielded winds of around 20 kt. This
seems reasonable for now, but confidence remains low, and there is
still the potential for a stronger winds with only a small shift
in the strength or track of the low.
Monday and Tuesday the winds look to generally remain fairly light
with the next storm system likely to bring gales on Wednesday or
Thursday. MKK
&&
.HYDROLOGY...The threat for minor flooding and sharp rises in
creeks and streams will diminish this afternoon as rainfall turns
light.
Additional rain starting Saturday night and continuing into early
next week has the potential to be more impactful. There is still
some uncertainty on the positioning and how long the heaviest rain
will last, but the heaviest rain will start around Cape Mendocino
and southward. This will again pose a threat for quick rises in
streams and creeks along with rock and mudslides. Risk for rock
and mudslides will again increase and could impact travel on
highways 299, 36, 101 and 199.
The storm track will remain active through much of next week with
much more rainfall likely. Additional Flood Watches will be
likely with increasing confidence on impactful accumulation
totals.
At this time, none of the main stem rivers are forecast to exceed
action/monitor stages. Rivers in narrow basins may once again
quickly rise with heavy rain on Friday. This is not too uncommon for
our rivers. Ensembles are showing slightly higher probabilities for
main stem rivers to reach flood stage within the next 10 days. The
highest chances are mid to late next week, but some potential is
there Sunday-Tuesday. Over the next ten days the RFC gives the
Russian River at Hopland now has a 42% chance to reach minor
flood stage. The Navarro River at Navarro has a 24% chance to
reach minor flood stage. The Eel River at Fernbridge has a 20%
chance to reach minor flood stage and a 51% chance to reach
action/monitor stage. The Mad River at Arcata has a 40% chance to
reach action/monitor stage but no ensemble members show flood
stage as a possibility in the nearer term.
&&
.EKA WATCHES/WARNINGS/ADVISORIES...
CA...
Wind Advisory until 8 AM PST Friday for CAZ101-102-105-106.
Flood Watch from midnight PST tonight through Friday
morning for CAZ101>106.
Wind Advisory until 8 AM PST Friday for CAZ103.
Wind Advisory until 10 AM PST Friday for CAZ104.
NORTHWEST CALIFORNIA COASTAL WATERS...
Gale Warning until 9 AM PST Friday for PZZ450-470.
Small Craft Advisory until 9 AM PST Friday for PZZ475.
&&
NOTE: The full forecast discussion is now regularly issued between
10 am/pm and 1 pm/am. Additional updates will be issued as needed.
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For forecast zone information
see the forecast zone map online:
https://www.weather.gov/images/eka/zonemap.pngIn the hours before
Local storm report, Dec 19, 8:41 AM PST, 2 hours 44 minutes before
Preliminary Local Storm Report
National Weather Service Eureka CA
841 AM PST Fri Dec 19 2025
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0833 AM Flood 3 SSE Arcata 40.83N 124.06W
12/19/2025 Humboldt CA NWS Employee
Water from Jacoby Creek flooding Graham Rd
in Arcata.
&&Local storm report, Dec 19, 9:06 AM PST, 2 hours 19 minutes before
Preliminary Local Storm Report
National Weather Service Eureka CA
906 AM PST Fri Dec 19 2025
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0906 AM Flood 1 SE Freshwater 40.76N 124.06W
12/19/2025 Humboldt CA NWS Employee
Flooding reported from Freshwater Creek.
&&Local storm report, Dec 19, 9:09 AM PST, 2 hours 16 minutes before
Preliminary Local Storm Report
National Weather Service Eureka CA
909 AM PST Fri Dec 19 2025
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0906 AM Flood Freshwater 40.76N 124.07W
12/19/2025 Humboldt CA NWS Employee
Flooding reported from Freshwater Creek on
Howard Heights Rd.
&&Local storm report, Dec 19, 10:14 AM PST, 1 hour 11 minutes before
Preliminary Local Storm Report
National Weather Service Eureka CA
1014 AM PST Fri Dec 19 2025
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1013 AM Landslide 4 WNW Redwood Valley 39.29N 123.27W
12/19/2025 Mendocino CA Law Enforcement
Slide reported on the right lane of
northbound Highway 101.
&&The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 19, 4:07 AM PST | Areal Flood Advisory | EKA | Humboldt | 3 hr |
| Dec 19, 8:39 AM PST | Areal Flood Advisory | EKA | Humboldt | 13 hr |
Nearby
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.