Alert archive / California / Small Craft Advisories in 2026

Small Craft Advisory 42, NWS Eureka, CA

April 18, 2026

NWS Eureka, CA issued this small craft advisory at Apr 18, 2026, 2:26 PM PDT. It took effect at Apr 19, 2026, 9:00 AM PDT. It was in force for 29 hr.

The area

The counties it named.

The facts

Issued
Apr 18, 2026, 2:26 PM PDT (21:26 UTC)
In effect from
Apr 19, 2026, 9:00 AM PDT
Expired
Apr 20, 2026, 2:00 PM PDT
In force
29 hr
Issued by
NWS Eureka, CA

The text

As transmitted.

241 
WHUS76 KEKA 182126
MWWEKA

URGENT - MARINE WEATHER MESSAGE
National Weather Service Eureka CA
226 PM PDT Sat Apr 18 2026

PZZ470-190530-
/O.NEW.KEKA.SC.Y.0042.260419T2000Z-260420T1500Z/
Waters from Pt. St. George to Cape Mendocino CA from 10 to 60 nm-
226 PM PDT Sat Apr 18 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM 1 PM SUNDAY TO 8 AM PDT
MONDAY...

* WHAT...South winds 10 to 20 kt with gusts up to 25 kt and steep
  seas 4 to 7 feet expected.

* WHERE...Waters from Pt. St. George to Cape Mendocino CA from 
  10 to 60 nm.

* WHEN...From 1 PM Sunday to 8 AM PDT Monday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

PZZ475-190530-
/O.NEW.KEKA.SC.Y.0042.260419T2000Z-260420T1500Z/
Waters from Cape Mendocino to Pt. Arena CA from 10 to 60 nm-
226 PM PDT Sat Apr 18 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM 1 PM SUNDAY TO 8 AM PDT
MONDAY...

* WHAT...Southeast winds 10 to 20 kt with gusts up to 25 kt and 
  steep seas 4 to 7 feet expected.

* WHERE...Waters from Cape Mendocino to Pt. Arena CA from 10 to 
  60 nm.

* WHEN...From 1 PM Sunday to 8 AM PDT Monday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$
8 follow-up statements
899 
WHUS76 KEKA 190521
MWWEKA

URGENT - MARINE WEATHER MESSAGE
National Weather Service Eureka CA
1021 PM PDT Sat Apr 18 2026

PZZ470-191330-
/O.CON.KEKA.SC.Y.0042.260419T2000Z-260420T1500Z/
Waters from Pt. St. George to Cape Mendocino CA from 10 to 60 nm-
1021 PM PDT Sat Apr 18 2026

...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 1 PM SUNDAY TO
8 AM PDT MONDAY...

* WHAT...South winds 10 to 20 kt with gusts up to 25 kt and seas 
  4 to 7 feet expected.

* WHERE...Waters from Pt. St. George to Cape Mendocino CA from 
  10 to 60 nm.

* WHEN...From 1 PM Sunday to 8 AM PDT Monday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

PZZ475-191330-
/O.CON.KEKA.SC.Y.0042.260419T2000Z-260420T1500Z/
Waters from Cape Mendocino to Pt. Arena CA from 10 to 60 nm-
1021 PM PDT Sat Apr 18 2026

...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 1 PM SUNDAY TO
8 AM PDT MONDAY...

* WHAT...Southeast winds 10 to 20 kt with gusts up to 25 kt and 
  seas 4 to 7 feet expected.

* WHERE...Waters from Cape Mendocino to Pt. Arena CA from 10 to 
  60 nm.

* WHEN...From 1 PM Sunday to 8 AM PDT Monday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$
398 
WHUS76 KEKA 191000
MWWEKA

URGENT - MARINE WEATHER MESSAGE
National Weather Service Eureka CA
300 AM PDT Sun Apr 19 2026

PZZ470-191800-
/O.CON.KEKA.SC.Y.0042.260419T2000Z-260420T1500Z/
Waters from Pt. St. George to Cape Mendocino CA from 10 to 60 nm-
300 AM PDT Sun Apr 19 2026

...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 1 PM THIS
AFTERNOON TO 8 AM PDT MONDAY...

* WHAT...South winds 10 to 20 kt with gusts up to 25 kt and seas 
  4 to 7 feet expected.

* WHERE...Waters from Pt. St. George to Cape Mendocino CA from 
  10 to 60 nm.

* WHEN...From 1 PM this afternoon to 8 AM PDT Monday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

PZZ475-191800-
/O.CON.KEKA.SC.Y.0042.260419T2000Z-260420T1500Z/
Waters from Cape Mendocino to Pt. Arena CA from 10 to 60 nm-
300 AM PDT Sun Apr 19 2026

...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 1 PM THIS
AFTERNOON TO 8 AM PDT MONDAY...

* WHAT...Southeast winds 10 to 20 kt with gusts up to 25 kt and 
  seas 4 to 7 feet expected.

* WHERE...Waters from Cape Mendocino to Pt. Arena CA from 10 to 
  60 nm.

* WHEN...From 1 PM this afternoon to 8 AM PDT Monday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$
594 
WHUS76 KEKA 191550
MWWEKA

URGENT - MARINE WEATHER MESSAGE
National Weather Service Eureka CA
850 AM PDT Sun Apr 19 2026

PZZ450-200000-
/O.EXB.KEKA.SC.Y.0042.260419T2000Z-260420T0700Z/
Coastal waters from Pt. St. George to Cape Mendocino CA out 10 nm-
850 AM PDT Sun Apr 19 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM 1 PM THIS AFTERNOON TO
MIDNIGHT PDT TONIGHT...

* WHAT...South winds 10 to 20 kt with gusts up to 30 kt and seas 
  4 to 7 feet expected.

* WHERE...Coastal waters from Pt. St. George to Cape Mendocino 
  CA out 10 nm.

* WHEN...From 1 PM this afternoon to midnight PDT tonight.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

PZZ470-200000-
/O.EXT.KEKA.SC.Y.0042.260419T1600Z-260420T1500Z/
Waters from Pt. St. George to Cape Mendocino CA from 10 to 60 nm-
850 AM PDT Sun Apr 19 2026

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 8 AM PDT MONDAY...

* WHAT...South winds 15 to 25 kt with gusts up to 30 kt and seas 
  around 7 feet expected.

* WHERE...Waters from Pt. St. George to Cape Mendocino CA from 
  10 to 60 nm.

* WHEN...Until 8 AM PDT Monday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

PZZ475-200000-
/O.CON.KEKA.SC.Y.0042.260419T2000Z-260420T1500Z/
Waters from Cape Mendocino to Pt. Arena CA from 10 to 60 nm-
850 AM PDT Sun Apr 19 2026

...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 1 PM THIS
AFTERNOON TO 8 AM PDT MONDAY...

* WHAT...South winds 15 to 25 kt with gusts up to 30 kt and seas 
  5 to 8 feet expected.

* WHERE...Waters from Cape Mendocino to Pt. Arena CA from 10 to 
  60 nm.

* WHEN...From 1 PM this afternoon to 8 AM PDT Monday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$
782 
WHUS76 KEKA 192128
MWWEKA

URGENT - MARINE WEATHER MESSAGE
National Weather Service Eureka CA
228 PM PDT Sun Apr 19 2026

PZZ455-200530-
/O.EXB.KEKA.SC.Y.0042.260420T0000Z-260420T1800Z/
Coastal waters from Cape Mendocino to Pt. Arena CA out 10 nm-
228 PM PDT Sun Apr 19 2026

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 11 AM PDT MONDAY...

* WHAT...Southeast winds 10 to 20 kt with gusts up to 30 kt and 
  seas 5 to 8 feet expected.

* WHERE...Coastal waters from Cape Mendocino to Pt. Arena CA out 
  10 nm.

* WHEN...Until 11 AM PDT Monday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

PZZ450-200530-
/O.CON.KEKA.SC.Y.0042.000000T0000Z-260420T0700Z/
Coastal waters from Pt. St. George to Cape Mendocino CA out 10 nm-
228 PM PDT Sun Apr 19 2026

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT PDT
TONIGHT...

* WHAT...Southeast winds 10 to 20 kt with gusts up to 30 kt and 
  seas 4 to 6 feet.

* WHERE...Coastal waters from Pt. St. George to Cape Mendocino 
  CA out 10 nm.

* WHEN...Until midnight PDT tonight.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

PZZ470-200530-
/O.CON.KEKA.SC.Y.0042.000000T0000Z-260420T1500Z/
Waters from Pt. St. George to Cape Mendocino CA from 10 to 60 nm-
228 PM PDT Sun Apr 19 2026

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 8 AM PDT MONDAY...

* WHAT...Southeast winds 10 to 20 kt with gusts up to 30 kt and 
  seas 6 to 8 feet.

* WHERE...Waters from Pt. St. George to Cape Mendocino CA from 
  10 to 60 nm.

* WHEN...Until 8 AM PDT Monday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

PZZ475-200530-
/O.CON.KEKA.SC.Y.0042.000000T0000Z-260420T1500Z/
Waters from Cape Mendocino to Pt. Arena CA from 10 to 60 nm-
228 PM PDT Sun Apr 19 2026

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 8 AM PDT MONDAY...

* WHAT...South winds 15 to 25 kt with gusts up to 30 kt and seas 
  5 to 7 feet.

* WHERE...Waters from Cape Mendocino to Pt. Arena CA from 10 to 
  60 nm.

* WHEN...Until 8 AM PDT Monday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$
755 
WHUS76 KEKA 200506
MWWEKA

URGENT - MARINE WEATHER MESSAGE
National Weather Service Eureka CA
1006 PM PDT Sun Apr 19 2026

PZZ455-201315-
/O.EXT.KEKA.SC.Y.0042.000000T0000Z-260420T2100Z/
Coastal waters from Cape Mendocino to Pt. Arena CA out 10 nm-
1006 PM PDT Sun Apr 19 2026

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 2 PM PDT MONDAY...

* WHAT...Southeast winds 10 to 20 kt with gusts up to 30 kt and 
  seas 5 to 8 feet.

* WHERE...Coastal waters from Cape Mendocino to Pt. Arena CA out 
  10 nm.

* WHEN...Until 2 PM PDT Monday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

PZZ470-201315-
/O.EXT.KEKA.SC.Y.0042.000000T0000Z-260420T2100Z/
Waters from Pt. St. George to Cape Mendocino CA from 10 to 60 nm-
1006 PM PDT Sun Apr 19 2026

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 2 PM PDT MONDAY...

* WHAT...Southeast winds 10 to 20 kt with gusts up to 25 kt and 
  seas 7 to 10 feet.

* WHERE...Waters from Pt. St. George to Cape Mendocino CA from 
  10 to 60 nm.

* WHEN...Until 2 PM PDT Monday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

PZZ475-201315-
/O.EXT.KEKA.SC.Y.0042.000000T0000Z-260420T2100Z/
Waters from Cape Mendocino to Pt. Arena CA from 10 to 60 nm-
1006 PM PDT Sun Apr 19 2026

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 2 PM PDT MONDAY...

* WHAT...South winds 15 to 25 kt with gusts up to 30 kt and seas 
  7 to 9 feet.

* WHERE...Waters from Cape Mendocino to Pt. Arena CA from 10 to 
  60 nm.

* WHEN...Until 2 PM PDT Monday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

PZZ450-200700-
/O.CON.KEKA.SC.Y.0042.000000T0000Z-260420T0700Z/
Coastal waters from Pt. St. George to Cape Mendocino CA out 10 nm-
1006 PM PDT Sun Apr 19 2026

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT PDT
TONIGHT...

* WHAT...Seas 4 to 6 feet.

* WHERE...Coastal waters from Pt. St. George to Cape Mendocino 
  CA out 10 nm.

* WHEN...Until midnight PDT tonight.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$
105 
WHUS76 KEKA 200951
MWWEKA

URGENT - MARINE WEATHER MESSAGE
National Weather Service Eureka CA
251 AM PDT Mon Apr 20 2026

PZZ455-201800-
/O.CON.KEKA.SC.Y.0042.000000T0000Z-260420T2100Z/
Coastal waters from Cape Mendocino to Pt. Arena CA out 10 nm-
251 AM PDT Mon Apr 20 2026

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 2 PM PDT THIS
AFTERNOON...

* WHAT...Southeast winds 10 to 20 kt with gusts up to 30 kt and 
  seas 7 to 10 feet.

* WHERE...Coastal waters from Cape Mendocino to Pt. Arena CA out 
  10 nm.

* WHEN...Until 2 PM PDT this afternoon.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

PZZ470-201800-
/O.CON.KEKA.SC.Y.0042.000000T0000Z-260420T2100Z/
Waters from Pt. St. George to Cape Mendocino CA from 10 to 60 nm-
251 AM PDT Mon Apr 20 2026

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 2 PM PDT THIS
AFTERNOON...

* WHAT...South winds 10 to 20 kt with gusts up to 25 kt and seas 
  8 to 10 feet.

* WHERE...Waters from Pt. St. George to Cape Mendocino CA from 
  10 to 60 nm.

* WHEN...Until 2 PM PDT this afternoon.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

PZZ475-201800-
/O.CON.KEKA.SC.Y.0042.000000T0000Z-260420T2100Z/
Waters from Cape Mendocino to Pt. Arena CA from 10 to 60 nm-
251 AM PDT Mon Apr 20 2026

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 2 PM PDT THIS
AFTERNOON...

* WHAT...South winds 10 to 20 kt with gusts up to 25 kt and seas 
  7 to 10 feet.

* WHERE...Waters from Cape Mendocino to Pt. Arena CA from 10 to 
  60 nm.

* WHEN...Until 2 PM PDT this afternoon.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$
992 
WHUS76 KEKA 201617
MWWEKA

URGENT - MARINE WEATHER MESSAGE
National Weather Service Eureka CA
917 AM PDT Mon Apr 20 2026

PZZ455-202100-
/O.CON.KEKA.SC.Y.0042.000000T0000Z-260420T2100Z/
Coastal waters from Cape Mendocino to Pt. Arena CA out 10 nm-
917 AM PDT Mon Apr 20 2026

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 2 PM PDT THIS
AFTERNOON...

* WHAT...Seas 7 to 10 feet.

* WHERE...Coastal waters from Cape Mendocino to Pt. Arena CA out 
  10 nm.

* WHEN...Until 2 PM PDT this afternoon.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

PZZ470-202100-
/O.CON.KEKA.SC.Y.0042.000000T0000Z-260420T2100Z/
Waters from Pt. St. George to Cape Mendocino CA from 10 to 60 nm-
917 AM PDT Mon Apr 20 2026

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 2 PM PDT THIS
AFTERNOON...

* WHAT...Seas 8 to 10 feet.

* WHERE...Waters from Pt. St. George to Cape Mendocino CA from 
  10 to 60 nm.

* WHEN...Until 2 PM PDT this afternoon.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

PZZ475-202100-
/O.CON.KEKA.SC.Y.0042.000000T0000Z-260420T2100Z/
Waters from Cape Mendocino to Pt. Arena CA from 10 to 60 nm-
917 AM PDT Mon Apr 20 2026

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 2 PM PDT THIS
AFTERNOON...

* WHAT...Seas 7 to 10 feet.

* WHERE...Waters from Cape Mendocino to Pt. Arena CA from 10 to 
  60 nm.

* WHEN...Until 2 PM PDT this afternoon.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$
396 
WHUS76 KEKA 202045
MWWEKA

URGENT - MARINE WEATHER MESSAGE
National Weather Service Eureka CA
145 PM PDT Mon Apr 20 2026

PZZ455-202145-
/O.EXP.KEKA.SC.Y.0042.000000T0000Z-260420T2100Z/
Coastal waters from Cape Mendocino to Pt. Arena CA out 10 nm-
145 PM PDT Mon Apr 20 2026

...SMALL CRAFT ADVISORY WILL EXPIRE AT 2 PM PDT THIS AFTERNOON...


$$

PZZ470-202145-
/O.EXP.KEKA.SC.Y.0042.000000T0000Z-260420T2100Z/
Waters from Pt. St. George to Cape Mendocino CA from 10 to 60 nm-
145 PM PDT Mon Apr 20 2026

...SMALL CRAFT ADVISORY WILL EXPIRE AT 2 PM PDT THIS AFTERNOON...


$$

PZZ475-202145-
/O.EXP.KEKA.SC.Y.0042.000000T0000Z-260420T2100Z/
Waters from Cape Mendocino to Pt. Arena CA from 10 to 60 nm-
145 PM PDT Mon Apr 20 2026

...SMALL CRAFT ADVISORY WILL EXPIRE AT 2 PM PDT THIS AFTERNOON...


$$

What forecasters said that day

The local office's own words before this small craft advisory 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 small craft advisory went out at Apr 18, 12:13 AM PDT, 14 hours 13 minutes earlier.

Area forecast discussion, Apr 18, 12:13 AM PDT, 14 hours 13 minutes before
AREA FORECAST DISCUSSION
National Weather Service Eureka CA
1213 AM PDT Sat Apr 18 2026

.SYNOPSIS...Near-freezing to freezing low temperatures forecasted
for the coldest areas Saturday morning. Rain returning Sunday
afternoon or evening continues into next week. Drier weather is
expected for late in the week.

&&

.DISCUSSION...Dry air over the area will cause overnight temperatures
for the interior to drop as low as freezing again by early this morning.
Freeze Warning and Frost Advisories have been issued for some of the
coldest interior valleys. It is recommended to cover sensitive plants
and take other precautions to protect agricultural property. Icy roads
also pose a possible threat through the morning. Coastal areas will
remain slightly warmer this morning as coastal stratus forms.

This weekend's storm track has continued to vary. Global models
continue to signal a cutoff low forming and lingering just east
of the 140W longitude from today through Wednesday. This storm
will move southward before stalling, increasing the chance for
rainfall across the entire CWA. Ample moisture will be available,
the main uncertainty will be if the main moisture flux lines up
with orographic lift. Global Ensemble models shows >80%
probabilities of IVT values over 250kg/m/s from Sunday afternoon
through Monday afternoon. A majority of ensembles members show IVT
values between 200-400 IVT. This very weak AR will funnel this
moisture over the area from Sunday through Tuesday, yet Sunday
afternoon through Monday afternoon looks to be rainiest period as
the moisture plume flows over the terrain. NBM data shows the
heaviest rainfall totals of 1.50-3.00" for the King Range and
mountains in northern Mendocino County. Elsewhere, rain looks to
be between 0.50- 1.00" for valleys and between 0.75-1.50" for
interior mountains not mentioned above. Snow levels are generally
expected to be around 5,000 feet and only a slight dusting of
snow (~1.0") is forecasted for Scott Mountain Pass (5,450ft).

Widespread rain could evolve into rainshowers as soon as Monday
evening lessening the widespread coverage. Showers may linger
as late as Thursday morning as the upper level low slowly takes
its time moving eastward, continuing to funnel moisture into the
area. The GFS and ECMWF both show dry weather with warm daytime
highs and cold nighttime lows returning for the end of the coming
week. DS

&&

.AVIATION...(06Z TAFs)...Depending on how much offshore flow weakens
early this morning, stratus may form near the coast, especially
around Humboldt Bay. Some models are showing a southerly wind
reversal developing off the North Coast before sunrise, which would
push any stratus towards CEC. NBM shows around a 60% to 65% chance
for at least MVFR conditions at both CEC and ACV. Should stratus
develop and impact the terminals, IFR/LIFR conditions are likely.
Any stratus and fog will likely lift by mid/late morning. VFR is
anticipated for most inland terminals

&&

.MARINE...Northerly winds have generally subsided today, though
some areas of 15 to 20 kt gusts are possible in the outer waters and
the lee of Cape Mendocino early this morning. Seas remain steep at
around 6 to 8 ft at 8 to 10 seconds. These will continue to subside
as winds ease through today. A frontal system moves through the area
Sunday morning. Winds will increase and turn southerly. Wind gusts
are forecast to peak at around 20 to 25 kts, but there is a low-end
chance (20%) for gale force gusts Sunday and Monday in the outer
waters. Wind speeds and direction is highly dependent on the track
of the low, which is currently forecast to move near or through the
waters Monday into Tuesday. A mid-period west swell will also arrive
Monday, peaking at around 8 to 10 ft at 12 seconds. Winds and seas
gradually subside late Tuesday into Wednesday as the low moves out
of the area. Stronger northerly winds return late next week behind
this low. JB

&&

.EKA WATCHES/WARNINGS/ADVISORIES...
CA...
     Frost Advisory until 8 AM PDT this morning for CAZ106-110-
     114-118.

     Freeze Warning until 8 AM PDT this morning for CAZ108-116-
     117.

NORTHWEST CALIFORNIA COASTAL WATERS...
None.
&&

NOTE: The full forecast discussion is now regularly issued between
10 am/pm and 1 pm/am. Additional updates will be issued as needed.

Visit us at https://www.weather.gov/eureka

Follow us on Facebook and Twitter at:
https://www.facebook.com/NWSEureka
https://www.twitter.com/NWSEureka

For forecast zone information
see the forecast zone map online:
https://www.weather.gov/images/eka/zonemap.png

The office that day

Everything else NWS Eureka, CA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 18, 9:20 AM PDTCoastal Flood AdvisoryEKAHumboldt18 hr

Nearby

Small Craft Advisories in California, 2026Every small craft advisory in 2026

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.