Hazardous Seas Warning 12, NWS Eureka, CA

934 
WHUS76 KEKA 202306
MWWEKA

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE EUREKA CA
306 PM PST MON FEB 20 2017

PZZ455-475-210715-
/O.UPG.KEKA.SC.Y.0024.000000T0000Z-170221T1100Z/
/O.NEW.KEKA.GL.W.0016.170220T2306Z-170221T1100Z/
/O.CAN.KEKA.GL.A.0007.170221T1100Z-170221T1700Z/
CAPE MENDOCINO TO PT ARENA OUT 10 NM-
CAPE MENDOCINO TO PT ARENA 10 TO 60 NM-
306 PM PST MON FEB 20 2017

...GALE WARNING IN EFFECT UNTIL 3 AM TUESDAY... 

* WINDS...SW 20 TO 30 KT WITH GUSTS TO 40 KT TONIGHT.

* WAVES...SW TO W 11 TO 13 FT AT AROUND 13 SECONDS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A GALE WARNING MEANS WINDS OF 34 TO 47 KNOTS ARE IMMINENT OR
OCCURRING. OPERATING A VESSEL IN GALE CONDITIONS REQUIRES
EXPERIENCE AND PROPERLY EQUIPPED VESSELS. IT IS HIGHLY
RECOMMENDED THAT MARINERS WITHOUT THE PROPER EXPERIENCE SEEK SAFE
HARBOR PRIOR TO THE ONSET OF GALE CONDITIONS.

$$

PZZ450-470-210715-
/O.EXT.KEKA.SE.W.0012.000000T0000Z-170221T0800Z/
/O.UPG.KEKA.GL.A.0007.170221T1100Z-170221T1700Z/
/O.NEW.KEKA.GL.W.0016.170221T0800Z-170221T1400Z/
PT ST GEORGE TO CAPE MENDOCINO OUT 10 NM-
PT ST GEORGE TO CAPE MENDOCINO 10 TO 60 NM-
306 PM PST MON FEB 20 2017

...HAZARDOUS SEAS WARNING NOW IN EFFECT UNTIL MIDNIGHT TONIGHT...
...GALE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 6 AM 
TUESDAY... 

* WINDS...SE 5 TO 15 KT...BECOMING SW 25 TO 35 KT WITH GUSTS TO 45
  KT TONIGHT. 

* WAVES...SW TO W 12 TO 14 FT AT AROUND 13 SECONDS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A GALE WARNING MEANS WINDS OF 34 TO 47 KNOTS ARE IMMINENT OR
OCCURRING. OPERATING A VESSEL IN GALE CONDITIONS REQUIRES
EXPERIENCE AND PROPERLY EQUIPPED VESSELS. IT IS HIGHLY
RECOMMENDED THAT MARINERS WITHOUT THE PROPER EXPERIENCE SEEK SAFE
HARBOR PRIOR TO THE ONSET OF GALE CONDITIONS.

A HAZARDOUS SEAS WARNING MEANS HAZARDOUS SEA CONDITIONS ARE
IMMINENT OR OCCURRING. RECREATIONAL BOATERS SHOULD REMAIN IN
PORT,OR TAKE SHELTER UNTIL WAVES SUBSIDE.  COMMERCIAL VESSELS
SHOULD PREPARE FOR ROUGH SEAS AND CONSIDER REMAINING IN PORT OR
TAKING SHELTER IN PORT UNTIL HAZARDOUS SEAS SUBSIDE.

$$

524 
WHUS76 KEKA 210414
MWWEKA

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE EUREKA CA
814 PM PST MON FEB 20 2017

PZZ450-470-211215-
/O.CON.KEKA.SE.W.0012.000000T0000Z-170221T0800Z/
/O.CON.KEKA.GL.W.0016.170221T0800Z-170221T1400Z/
PT ST GEORGE TO CAPE MENDOCINO OUT 10 NM-
PT ST GEORGE TO CAPE MENDOCINO 10 TO 60 NM-
814 PM PST MON FEB 20 2017

...HAZARDOUS SEAS WARNING REMAINS IN EFFECT UNTIL MIDNIGHT PST
TONIGHT...
...GALE WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 6 AM
PST TUESDAY...

* WINDS...S-SE 5 TO 15 KT...BECOMING SW 25 TO 35 KT WITH GUSTS TO
  45 KT TONIGHT. 

* WAVES...12 TO 14 FT SEAS...INCLUDING W 6 FT AT 13 SECONDS AND S
  8 TO 11 FT AROUND 8 SECONDS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A GALE WARNING MEANS WINDS OF 34 TO 47 KNOTS ARE IMMINENT OR
OCCURRING. OPERATING A VESSEL IN GALE CONDITIONS REQUIRES
EXPERIENCE AND PROPERLY EQUIPPED VESSELS. IT IS HIGHLY
RECOMMENDED THAT MARINERS WITHOUT THE PROPER EXPERIENCE SEEK SAFE
HARBOR PRIOR TO THE ONSET OF GALE CONDITIONS.

A HAZARDOUS SEAS WARNING MEANS HAZARDOUS SEA CONDITIONS ARE
IMMINENT OR OCCURRING. RECREATIONAL BOATERS SHOULD REMAIN IN
PORT,OR TAKE SHELTER UNTIL WAVES SUBSIDE.  COMMERCIAL VESSELS
SHOULD PREPARE FOR ROUGH SEAS AND CONSIDER REMAINING IN PORT OR
TAKING SHELTER IN PORT UNTIL HAZARDOUS SEAS SUBSIDE.

$$

PZZ455-475-211100-
/O.CON.KEKA.GL.W.0016.000000T0000Z-170221T1100Z/
CAPE MENDOCINO TO PT ARENA OUT 10 NM-
CAPE MENDOCINO TO PT ARENA 10 TO 60 NM-
814 PM PST MON FEB 20 2017

...GALE WARNING REMAINS IN EFFECT UNTIL 3 AM PST TUESDAY...

* WINDS...SW 20 TO 30 KT WITH GUSTS TO 40 KT TONIGHT.

* WAVES...11 TO 14 FT SEAS...INCLUDING W 6 FT AT 13 SECONDS AND S
8 TO 11 FT AROUND 8 SECONDS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A GALE WARNING MEANS WINDS OF 34 TO 47 KNOTS ARE IMMINENT OR
OCCURRING. OPERATING A VESSEL IN GALE CONDITIONS REQUIRES
EXPERIENCE AND PROPERLY EQUIPPED VESSELS. IT IS HIGHLY
RECOMMENDED THAT MARINERS WITHOUT THE PROPER EXPERIENCE SEEK SAFE
HARBOR PRIOR TO THE ONSET OF GALE CONDITIONS.

$$

AREA FORECAST DISCUSSION
National Weather Service Eureka CA
322 AM PST Mon Feb 20 2017

.SYNOPSIS...Wet week ahead with no real drying in sight. Light to
moderate rain showers will continue through today. The rainfall
rate will increase tonight, with moderate steady rain continuing
through midday Tuesday. Expect windy conditions this morning and
then once again tonight as a pair of low pressure systems pass by
to our NW. Rain showers will linger from late Tuesday through the
end of the work week. We will have a cooling trend later this
week, with lowering snow level to around 2500 feet at times.

&&

.DISCUSSION...Southerly winds have been increasing early this
morning as a surface low moves northeastward toward the Oregon
coast just off Crescent City. The HRRR continues to indicate
925MB winds ramping up to 50 to 55 kt just offshore of Crescent
City before sunrise. The surface low generating these winds is
expected to pass NW into the Oregon coast rapidly this morning so
have continued the wind advisory through 8 am as previously
forecast. Once the surface low passes to the NW of KCEC winds will
drop off some along the northern CA coast. SW winds will likely
continue to be gusty across Del Norte county through mid morning.
The next storm will develop quickly Monday afternoon and another
round of strong and gusty southerly winds are expected Monday
evening and again overnight. It is interesting to note that the
strongest winds with this second storm will be from the west. With
greater instability and the potential for thunderstorms, gusts to
50 to 60 mph will definitely be possible as cooler air aloft
arrives.

The low pressure system bringing the SW-ly flow will enhance the
onshore upslope flow bringing continued showers through the day.
The main axis of heavy rain will focus towards the SF Bay Area.
Models are now indicating NW CA will get moderate rain from
Monday afternoon through Tuesday morning as the next disturbance
moves toward the coast bringing deeper moisture north with it.
Rain will be heavy at times especially south of Cape Mendocino.
Rainfall rates of about 0.5 to 0.75 inches every 6 hours. Expect
storm total precipitation around 2 to 4 inches, with higher
amounts over upslope terrain locations.

Winds will increase rapidly ahead of the next 2 surface lows and
attendant frontal systems. The first increase is occurring this
morning. A Wind Advisory continues as mentioned above for this
event, with the focus of the winds over the higher elevations of
Humboldt and Del Norte counties. The next wind event is expected
late Monday afternoon through Monday night. The models have been
varying quite a bit with this system, but the latest indications
are that the associated winds will be a bit stronger and more
widespread than the first event and from the west. As a result,
have continued the High Wind Watch for most areas that was issued
earlier. It appears the strongest winds will reach farther
inland. As mentioned, the stability with this second system is
much lower and as we had some isolated strikes overnight near our
southern border have added slight chance of thunderstorms over the
marine and for most areas inland. The only exception is the
higher inland mountains.

Precipitation will taper off on Tuesday, as the storm track shifts
north of the area. However, showers will still linger over NW
California. NW California will be on the back side of the upper
level trough, under NW-ly flow. However, there will be impulses
moving across the area from the NW at regular interval, which will
keep the showery weather over NW California. With the NW-ly upper
level flow, colder air will move into the area, dropping the snow
levels as low as 2500 feet at times. /mkn

&&

.AVIATION...VFR to MVFR conditions and moderate to moderate and gusty winds will
continue at KCEC, KACV and KUKI through the early afternoon. The lower conditions
will be due to reduced ceilings and at times reduced visibilities as showers move
across the region at times this morning. The winds will be moderate this afternoon
and evening at KCEC, KACV and KUKI. VFR to MVFR conditions will prevail at KCEC,
KACV and KUKI overnight tonight and early Tuesday with gusty winds occurring. The
lower conditions will be due to reduced ceilings and visibilities as showers move
through the area. The showers and gusty winds will be due to the passage of a
cold front early Tuesday.

&&

.MARINE...The winds and seas have increased across the waters as an offshore
low pressure system moves northeastward toward the Oregon coast. As the low
pressure system moves northeastward into Oregon the winds and seas will diminish
slightly this afternoon and evening. Another low pressure system will move into
Oregon overnight and early Tuesday morning. An associated cold front will move
across the waters early Tuesday morning. Therefore the winds and seas will
increase overnight tonight. A gale warning is in effect across the northern waters
through noon today and across the southern waters through early this morning.
A gale warning is likely across all the waters from early Tuesday morning through
late Tuesday morning as the cold front moves across the waters increasing the
winds. The winds and seas will diminish across all the waters Tuesday afternoon
and Tuesday night in the wake of the cold front.

&&

HYDROLOGY...A Flood Watch for the Navarro River at Navarro has
continued this morning. The Eel River at Fernbridge and the
Klamath River at Klamath are forecast to rise above monitor stage
on Tuesday. The forecast for the Russian River at Hopland is being
watched closely and we may need to issue a Flood Advisory for
this location.  /mkn

&&

.EKA WATCHES/WARNINGS/ADVISORIES...
CA...Flood Watch from this afternoon through Tuesday afternoon for
     CAZ101>106-108>113.

     High Wind Watch from this afternoon through late tonight for
     CAZ104>111-113.

     Wind Advisory until 8 AM PST this morning for CAZ101>106.

NORTHWEST CALIFORNIA COASTAL WATERS...Gale Watch from late tonight through Tuesday morning for PZZ450-
     455-470-475.

     Small Craft Advisory until 3 AM PST early this morning for
     PZZ450-455-470-475.

     Gale Warning until noon PST today for PZZ450-470.

     Gale Warning until 9 AM PST this morning for PZZ455-475.

&&

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For forecast zone information
see the forecast zone map online:
http://www.weather.gov/eureka/zonemap.png

Hazardous Weather Outlook
National Weather Service Eureka CA
348 AM PST Mon Feb 20 2017

CAZ101>103-211200-
Coastal Del Norte-Del Norte Interior-Northern Humboldt Coast-
348 AM PST Mon Feb 20 2017

...WIND ADVISORY IN EFFECT UNTIL 8 AM PST THIS MORNING...
...FLOOD WATCH IN EFFECT FROM THIS AFTERNOON THROUGH TUESDAY
AFTERNOON...

This hazardous weather outlook is for northwest California.

.DAY ONE...Today and tonight.

Wind Advisory.
Flood Watch.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Flood Watch.
Thunderstorms possible.
Risk for mud and rock slides for mountain roadways.
Snowfall for high elevation travel corridors.

.SPOTTER INFORMATION STATEMENT...
Spotter activation is not expected at this time.

CAZ112-211200-
Southwestern Mendocino Interior-
348 AM PST Mon Feb 20 2017

...FLOOD WATCH IN EFFECT FROM THIS AFTERNOON THROUGH TUESDAY
AFTERNOON...

This hazardous weather outlook is for northwest California.

.DAY ONE...Today and tonight.

Flood Watch.
Thunderstorms possible tonight.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Flood Watch.
Thunderstorms possible.
Risk for mud and rock slides for mountain roadways.
Snowfall for high elevation travel corridors.

.SPOTTER INFORMATION STATEMENT...
Spotter activation is not expected at this time.

CAZ108>111-113-211200-
Southern Trinity-Mendocino Coast-Northwestern Mendocino Interior-
Northeastern Mendocino Interior-Southeastern Mendocino Interior-
348 AM PST Mon Feb 20 2017

...FLOOD WATCH IN EFFECT FROM THIS AFTERNOON THROUGH TUESDAY
AFTERNOON...
...HIGH WIND WATCH IN EFFECT FROM THIS AFTERNOON THROUGH LATE
TONIGHT...

This hazardous weather outlook is for northwest California.

.DAY ONE...Today and tonight.

Flood Watch.
High Wind Watch.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Flood Watch.
Thunderstorms possible.
Risk for mud and rock slides for mountain roadways.
Snowfall for high elevation travel corridors.

.SPOTTER INFORMATION STATEMENT...
Spotter activation is not expected at this time.

CAZ104>106-211200-
Southwestern Humboldt-Northern Humboldt Interior-
Southern Humboldt Interior-
348 AM PST Mon Feb 20 2017

...WIND ADVISORY IN EFFECT UNTIL 8 AM PST THIS MORNING...
...FLOOD WATCH IN EFFECT FROM THIS AFTERNOON THROUGH TUESDAY
AFTERNOON...
...HIGH WIND WATCH IN EFFECT FROM THIS AFTERNOON THROUGH LATE
TONIGHT...

This hazardous weather outlook is for northwest California.

.DAY ONE...Today and tonight.

Wind Advisory.
Flood Watch.
High Wind Watch.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Flood Watch.
Thunderstorms possible.
Risk for mud and rock slides for mountain roadways.
Snowfall for high elevation travel corridors.

.SPOTTER INFORMATION STATEMENT...
Spotter activation is not expected at this time.

CAZ107-211200-
Northern Trinity-
348 AM PST Mon Feb 20 2017

...HIGH WIND WATCH IN EFFECT FROM THIS AFTERNOON THROUGH LATE
TONIGHT...

This hazardous weather outlook is for northwest California.

.DAY ONE...Today and tonight.

High Wind Watch.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Flood Watch.
Risk for mud and rock slides for mountain roadways.
Snowfall for high elevation travel corridors.

.SPOTTER INFORMATION STATEMENT...
Spotter activation is not expected at this time.