WWA Summary for All Issued by MFR

Coastal Flood Advisory

Coastal Hazard Message
National Weather Service Eureka CA
715 PM PST Fri Dec 5 2025

CAZ103-061215-
/O.CON.KEKA.CF.Y.0011.251206T1800Z-251206T2100Z/
Northern Humboldt Coast-
715 PM PST Fri Dec 5 2025

...COASTAL FLOOD ADVISORY REMAINS IN EFFECT FROM 10 AM TO 1 PM
PST SATURDAY...

* WHAT...High astronomical tides will cause minor flooding in low
  lying areas around Humboldt Bay. Up to one half foot of
  saltwater inundation above ground level is possible near
  shorelines and tidal waterways. Between 8.9 and 9.2 feet MLLW
  at the North Spit tide gauge is predicted.

* WHERE...Northern Humboldt Coast County.

* WHEN...From 10 AM to 1 PM PST Saturday. High tide is at 11:44 AM
  at the Humboldt Bay North Spit tide gauge. Saltwater inundation
  will be possible 1 to 2 hours before and after high tide.

* IMPACTS...Flooding of low lying areas around Humboldt Bay
  including parks and roads with only isolated closures expected.
  Flooding will likely impact Jackson Ranch Road in the Arcata
  Bottoms and several roads in King Salmon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Coastal Flood Advisory indicates that onshore winds and tides
will combine to generate flooding of low areas along the shore.

Feet Above Ground is locally defined as feet above the Highest
Astronomical Tide or HAT.

&&

$$

Small Craft Advisory

URGENT - MARINE WEATHER MESSAGE
National Weather Service Portland OR
208 PM PST Fri Dec 5 2025

PZZ251>253-271>273-061415-
/O.CON.KPQR.SC.Y.0144.000000T0000Z-251207T0600Z/
Coastal waters from Cape Shoalwater WA to Cape Falcon OR out
10 NM-
Coastal waters from Cape Falcon to Cape Foulweather OR out 10 NM-
Coastal waters from Cape Foulweather to Florence OR out 10 NM-
Waters from Cape Shoalwater WA to Cape Falcon OR from 10 to 60 NM-
Waters from Cape Falcon to Cape Foulweather OR from 10 to 60 NM-
Waters from Cape Foulweather to Florence OR from 10 to 60 NM-
208 PM PST Fri Dec 5 2025

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 PM PST
SATURDAY...

* WHAT...Seas 10 to 15 ft at 13 seconds and west winds 15 to 25
  kt with gusts up to 30 kt.

* WHERE...Coastal Waters from Cape Shoalwater to Florence out 60
  NM.

* WHEN...Until 10 PM PST Saturday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

URGENT - MARINE WEATHER MESSAGE
National Weather Service Medford OR
200 PM PST Fri Dec 5 2025

PZZ350-370-061100-
/O.CON.KMFR.SC.Y.0107.000000T0000Z-251207T0000Z/
Coastal waters from Florence to Cape Blanco OR out 10 nm-
Waters from Florence to Cape Blanco OR from 10 to 60 nm-
200 PM PST Fri Dec 5 2025

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST
SATURDAY...

* WHAT...West to southwest wind 10 to 20 kts and steep seas 7 to
  11 ft at 10 seconds. Beginning Saturday, south winds becoming 20
  to 30 kts with steep wind-driven seas 9 to 11 ft.

* WHERE...All areas.

* WHEN...From 4 PM Thursday to 4 PM PST Saturday.

* IMPACTS...Gusty winds and steep seas could capsize or damage
  smaller vessels.

* View the hazard area in detail at https://go.usa.gov/x6hks

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners and those operating smaller vessels should
remain in port and avoid the area of hazardous conditions.

&&

$$

URGENT - MARINE WEATHER MESSAGE
National Weather Service Medford OR
200 PM PST Fri Dec 5 2025

PZZ356-061100-
/O.CON.KMFR.SC.Y.0106.000000T0000Z-251207T0000Z/
Coastal waters from Cape Blanco OR to Pt. St. George CA out 10 nm-
200 PM PST Fri Dec 5 2025

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST
SATURDAY...

* WHAT...Southwest winds 10 to 20 kts and steep seas 7 to 11 feet
  at 10 seconds.

* WHERE...Beyond 5 nm from shore, except closer to the coast
  towards Port Orford.

* WHEN...Until 4 PM PST Saturday.

* IMPACTS...Gusty winds and or steep seas could capsize or
  damage smaller vessels.

* View the hazard area in detail at https://go.usa.gov/x6hks

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners and those operating smaller vessels should
remain in port and avoid the area of hazardous conditions.

&&

$$

URGENT - MARINE WEATHER MESSAGE
National Weather Service Medford OR
200 PM PST Fri Dec 5 2025

PZZ376-061100-
/O.CON.KMFR.SC.Y.0105.000000T0000Z-251207T0000Z/
Waters from Cape Blanco OR to Pt. St. George CA from 10 to 60 nm-
200 PM PST Fri Dec 5 2025

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST
SATURDAY...

* WHAT...Southwest winds of 10 to 20 kt, and steep west seas 8
  to 10 feet at 6 seconds.

* WHERE...Beyond 30 nm from shore west of Point St. George and
  just beyond 10 nm from shore west of Pistol River.

* WHEN...Until 4 PM PST Saturday.

* IMPACTS...Gusty winds and/or steep seas could capsize or
  damage smaller vessels.

* View the hazard area in detail at https://go.usa.gov/x6hks

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners and those operating smaller vessels should
remain in port and avoid the area of hazardous conditions.

&&

$$

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

Hydrologic Outlook

Hydrologic Outlook
ORZ101>128-WAZ201>211-061400-

Hydrologic Outlook
National Weather Service Portland OR
246 PM PST Fri Dec 5 2025

...AN ATMOSPHERIC RIVER WILL BRING PERIODS OF HEAVY RAIN FROM
DECEMBER 8-10, RESULTING IN AN INCREASED RISK FOR RIVER AND URBAN
FLOODING...

A series of frontal systems will keep conditions wet through the
weekend and much of next week. The most notable period will be late
Monday through late Wednesday, where a prolonged atmospheric river
may bring significant rainfall and rising rivers across southwest
Washington and northwest Oregon. However, river flooding for some
locations could continue into Thursday and beyond as some rivers
take longer to respond to heavier rainfall. Rivers draining the
Coast Range and Willapa Hills have a 30-60% chance of reaching
moderate flood stage and a 10-30% chance of reaching major flood
stage. Additionally, many Willamette River tributaries that drain
from the Coast Range and Cascades have anywhere from a 10-55% chance
of reaching minor flood stage and a 10-25% chance of reaching
moderate flood stage. Flooding of the Willamette mainstem rivers is
unlikely to occur (less than 10%). Probabilities for specific river
points can be found at the National Water Prediction Service
website.

There is also the potential for flooding along small creeks and
streams, as well as urban flooding, including roadway flooding, for
locations in the central Willamette Valley north into the southwest
Washington lowlands, including the Portland metro area. Periods of
heavy rain will also increase the risk for landslides in areas of
steep terrain, and debris flows over recently burned areas.
$$

03

Short Term Forecast

Short Term Forecast
National Weather Service Eureka CA
710 PM PST Fri Dec 5 2025

CAZ103-060445-
Northern Humboldt Coast-
710 PM PST Fri Dec 5 2025

.NOW...

Patchy dense fog has developed and will likely persist over the
next few hours, especially around Humboldt Bay and along portions
of HWY 101 from McKinleyville to about Fortuna (which includes
Arcata and Eureka). Use low beams and allow extra time to reach
your destination.


$$