Gale Warning 3, NWS Medford, OR

339 
WHUS76 KMFR 141050
MWWMFR

URGENT - MARINE WEATHER MESSAGE
National Weather Service Medford OR
250 AM PST Sun Jan 14 2018

...South gales and very steep seas Monday and Monday night...

.A strong front will bring south gales and very steep and
powerful seas to much of the area Monday and Monday night.
Confidence is high that gales will occur during the warning
period, however, there may be several surges of strong wind as
low pressure forms along the front as it approaches the coast.
The strongest winds and highest seas are expected beyond a few
miles from shore Monday, but the worst conditions will move in
close to shore as the front moves in Monday evening and night.
Small craft advisory level seas will start over the outer waters
as early as Sunday morning then spread toward shore and worsen as
winds increase Sunday afternoon.

PZZ370-376-150000-
/O.CON.KMFR.SW.Y.0005.180114T1200Z-180115T1200Z/
/O.NEW.KMFR.SI.Y.0001.180115T1200Z-180115T2100Z/
/O.EXT.KMFR.GL.W.0003.180115T2100Z-180116T1200Z/
/O.CON.KMFR.SE.W.0003.180116T1200Z-180117T0600Z/
Waters from Florence to Cape Blanco OR from 10 to 60 nm-
Waters from Cape Blanco OR to Pt. St. George CA from 10 to 60 nm-
250 AM PST Sun Jan 14 2018

...SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS REMAINS IN EFFECT
UNTIL 4 AM PST MONDAY...
...SMALL CRAFT ADVISORY FOR WINDS IN EFFECT FROM 4 AM TO 1 PM PST
MONDAY...
...GALE WARNING NOW IN EFFECT FROM 1 PM MONDAY TO 4 AM 
PST TUESDAY... ...HAZARDOUS SEAS WARNING REMAINS IN EFFECT FROM 4 
AM TO 10 PM PST TUESDAY...

The National Weather Service in Medford has issued a Small Craft
Advisory for winds...which is in effect from 4 AM to 1 PM PST
Monday. 

* Winds...South 18 to 24 KT developing Sunday night then rising to
  gales 30 to 40 kt with gusts to 45 kt Monday afternoon through 
  early Tuesday morning.

* Seas...Steep seas dominated by west swells of 8 to 10 feet with
  a period of 14 seconds will develop today. Swells rise to 13 to
  16 feet with a period of 18 seconds tonight. Wind waves and 
  swell will combine to produce chaotic and very steep seas of 18 
  to 23 feet late Monday into Tuesday. 

* Areas affected and timing...All areas will be affected, 
  however, the strongest winds and most hazardous seas will 
  occur just prior to and during the frontal passage Monday 
  afternoon and evening. 

* View the hazard area in detail at
  https://www.wrh.noaa.gov/mfr/hazard 

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 Small Craft Advisory for hazardous seas means that waves will
be steep enough to create a potential hazard to smaller vessels
and inexperienced mariners.

A Small Craft Advisory for winds means that gusty winds will
create a potential hazard to smaller vessels and inexperienced
mariners.

&&

$$

PZZ350-356-150000-
/O.CON.KMFR.SW.Y.0005.180114T1800Z-180115T1200Z/
/O.NEW.KMFR.SI.Y.0001.180115T1200Z-180115T2100Z/
/O.EXT.KMFR.GL.W.0003.180115T2100Z-180116T1200Z/
/O.EXT.KMFR.SE.W.0003.180115T2100Z-180117T0600Z/
Coastal waters from Florence to Cape Blanco OR out 10 nm-
Coastal waters from Cape Blanco OR to Pt. St. George CA out 10 nm-
250 AM PST Sun Jan 14 2018


...SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS REMAINS IN EFFECT
UNTIL 4 AM PST MONDAY...
...SMALL CRAFT ADVISORY FOR WINDS IN EFFECT FROM 4 AM TO 1 PM PST
MONDAY...
...GALE WARNING NOW IN EFFECT FROM 1 PM MONDAY TO 4 AM PST
TUESDAY...
...HAZARDOUS SEAS WARNING NOW IN EFFECT FROM 1 PM MONDAY TO 10 PM
PST TUESDAY...

The National Weather Service in Medford has issued a Small Craft
Advisory for winds...which is in effect from 4 AM to 1 PM PST
Monday. 

* Winds...South 18 to 24 KT developing Sunday night then rising to
  gales 30 to 40 kt with gusts to 45 kt Monday afternoon through
  early Tuesday morning.

* Seas...Steep seas dominated by west swells of 8 to 10 feet with
  a period of 14 seconds will develop today. Swells rise to 13 to
  16 feet with a period of 18 seconds tonight. Wind waves and 
  swell will combine to produce chaotic and very steep seas of 18 
  to 23 feet late Monday into Tuesday. 

* Areas affected and timing...The strongest winds and worst seas 
  are most likely beyond a few miles from shore as the front 
  passes Monday evening and night. However, dangerous conditions 
  may push into the coast at times depending on the strength and 
  location of low pressure centers along the front. Very steep 
  seas will be the primary hazard near Brookings, but brief 
  strong winds will be possible as the front passes Monday 
  night. 

* View the hazard area in detail at
  https://www.wrh.noaa.gov/mfr/hazard 

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 Small Craft Advisory for hazardous seas means that waves will
be steep enough to create a potential hazard to smaller vessels
and inexperienced mariners.

A Small Craft Advisory for winds means that gusty winds will
create a potential hazard to smaller vessels and inexperienced
mariners.

&&

$$


http://www.weather.gov/medford

066 
WHUS76 KMFR 142230
MWWMFR

URGENT - MARINE WEATHER MESSAGE
National Weather Service Medford OR
230 PM PST Sun Jan 14 2018

...South gales and very steep seas Monday and Monday night...

.Seas will be steep into Monday. A strong front will bring south 
gales and very steep and powerful seas to much of the area Monday 
morning into Monday evening. The winds will diminish Monday
evening, but seas will remain very steep into Monday night.

PZZ370-376-151130-
/O.EXT.KMFR.SW.Y.0005.000000T0000Z-180115T1800Z/
/O.CAN.KMFR.SI.Y.0001.180115T1200Z-180115T2100Z/
/O.NEW.KMFR.SE.W.0004.180115T1800Z-180116T1200Z/
/O.EXT.KMFR.GL.W.0003.180115T1800Z-180116T0600Z/
/O.CAN.KMFR.SE.W.0003.180116T1200Z-180117T0600Z/
/O.NEW.KMFR.SW.Y.0006.180116T1200Z-180117T0600Z/
Waters from Florence to Cape Blanco OR from 10 to 60 nm-
Waters from Cape Blanco OR to Pt. St. George CA from 10 to 60 nm-
230 PM PST Sun Jan 14 2018

...SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS NOW IN EFFECT UNTIL
   10 AM PST MONDAY...
...GALE WARNING NOW IN EFFECT FROM 10 AM TO 10 PM PST MONDAY...
...HAZARDOUS SEAS WARNING IN EFFECT FROM 10 AM MONDAY TO 4 AM PST
   TUESDAY...

The National Weather Service in Medford has issued a Hazardous
Seas Warning...which is in effect from 10 AM Monday to 4 AM PST
Tuesday. A Small Craft Advisory for hazardous seas has also been
issued. This Small Craft Advisory for hazardous seas is in effect
from 4 AM to 10 PM PST Tuesday. 

* Winds...South winds increasing to 30 to 40 KT Monday morning,
  then diminishing to southwest 15 to 25 KT Monday night.

* Seas...Steep seas initially dominated by west swells of 12 to 13
  feet will build to 14 to 15 feet this evening. The swell will
  become mixed with choppy wind waves Monday, becoming very steep
  15 to 19 feet Monday afternoon, and 18 to 22 feet Monday 
  evening. Seas will subside to 14 to 15 feet Tuesday afternoon. 

* Areas affected and timing...All areas will be affected, 
  however, the strongest winds and most hazardous seas will 
  occur just prior to and during the frontal passage Monday 
  afternoon and evening. 

* View the hazard area in detail at 
  https://www.wrh.noaa.gov/mfr/hazard 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Hazardous Seas Warning means very steep and 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.

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 Small Craft Advisory for hazardous seas means that waves will
be steep enough to create a potential hazard to smaller vessels
and inexperienced mariners.

&&

$$

PZZ350-356-151130-
/O.EXT.KMFR.SW.Y.0005.000000T0000Z-180115T1800Z/
/O.CAN.KMFR.SI.Y.0001.180115T1200Z-180115T2100Z/
/O.EXT.KMFR.GL.W.0003.180115T1800Z-180116T0600Z/
/O.EXT.KMFR.SE.W.0003.180115T1800Z-180116T1200Z/
/O.NEW.KMFR.SW.Y.0006.180116T1200Z-180117T0600Z/
Coastal waters from Florence to Cape Blanco OR out 10 nm-
Coastal waters from Cape Blanco OR to Pt. St. George CA out 10 nm-
230 PM PST Sun Jan 14 2018

...SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS NOW IN EFFECT UNTIL
   10 AM PST MONDAY...
...GALE WARNING NOW IN EFFECT FROM 10 AM TO 10 PM PST MONDAY...
...HAZARDOUS SEAS WARNING NOW IN EFFECT FROM 10 AM MONDAY TO 4 AM
   PST TUESDAY...

The National Weather Service in Medford has issued a Small Craft
Advisory for hazardous seas...which is in effect from 4 AM to
10 PM PST Tuesday.

* Winds...South winds increasing to 30 to 40 KT Monday afternoon,
  then diminishing to southwest 15 to 25 KT Monday night.

* Seas...Steep seas initially dominated by west swells of 12 to 13
  feet will build to 14 to 15 feet this evening. The swell will
  become mixed with choppy wind waves Monday, becoming very steep
  13 to 16 feet Monday afternoon, and 15 to 19 feet Monday 
  evening. Seas will subside to 14 to 15 feet Tuesday afternoon. 

* Areas affected and timing...The strongest winds and heaviest
  seas will occur beyond 5 NM of the coast around Cape Blanco.

* View the hazard area in detail at 
  https://www.wrh.noaa.gov/mfr/hazard 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Hazardous Seas Warning means very steep and 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.

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 Small Craft Advisory for hazardous seas means that waves will
be steep enough to create a potential hazard to smaller vessels
and inexperienced mariners.

&&

$$

http://www.weather.gov/medford

434 
WHUS76 KMFR 151125
MWWMFR

URGENT - MARINE WEATHER MESSAGE
National Weather Service Medford OR
325 AM PST Mon Jan 15 2018

...South gales and very steep seas Today and tonight...

.A strong front will bring south gales and very steep and 
powerful seas to much of the area today. The winds will diminish 
this evening, but seas will remain very steep into tonight.

PZZ350-356-160030-
/O.CON.KMFR.SW.Y.0005.000000T0000Z-180115T1800Z/
/O.CON.KMFR.GL.W.0003.180115T1800Z-180116T0600Z/
/O.CON.KMFR.SE.W.0003.180115T1800Z-180116T1200Z/
/O.CON.KMFR.SW.Y.0006.180116T1200Z-180117T0600Z/
Coastal waters from Florence to Cape Blanco OR out 10 nm-
Coastal waters from Cape Blanco OR to Pt. St. George CA out 10 nm-
325 AM PST Mon Jan 15 2018

...SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS REMAINS IN EFFECT
UNTIL 10 AM PST THIS MORNING...
...GALE WARNING REMAINS IN EFFECT FROM 10 AM THIS MORNING TO
10 PM PST THIS EVENING...
...HAZARDOUS SEAS WARNING REMAINS IN EFFECT FROM 10 AM THIS
MORNING TO 4 AM PST TUESDAY...

* Winds...South winds increasing to 30 to 35 knots gusting to 45
  knots this afternoon, then diminishing to southwest 15 to 25 KT
  tonight.

* Seas...Steep seas initially dominated by west swells will become
  mixed with choppy wind waves this afternoon, becoming very steep
  at 15 to 18 feet this afternoon...then subside to 14 to 15 feet
  Tuesday afternoon. 

* Areas affected and timing...The strongest winds and heaviest 
  seas will occur beyond 5 NM of the coast around Cape Blanco. 

* View the hazard area in detail at 
  https://www.wrh.noaa.gov/mfr/hazard 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Hazardous Seas Warning means very steep and 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.

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 Small Craft Advisory for hazardous seas means that waves will
be steep enough to create a potential hazard to smaller vessels
and inexperienced mariners.

&&

$$

PZZ370-376-160030-
/O.CON.KMFR.SW.Y.0005.000000T0000Z-180115T1800Z/
/O.CON.KMFR.GL.W.0003.180115T1800Z-180116T0600Z/
/O.CON.KMFR.SE.W.0004.180115T1800Z-180116T1200Z/
/O.CON.KMFR.SW.Y.0006.180116T1200Z-180117T0600Z/
Waters from Florence to Cape Blanco OR from 10 to 60 nm-
Waters from Cape Blanco OR to Pt. St. George CA from 10 to 60 nm-
325 AM PST Mon Jan 15 2018

...SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS REMAINS IN EFFECT
UNTIL 10 AM PST THIS MORNING...
...GALE WARNING REMAINS IN EFFECT FROM 10 AM THIS MORNING TO
10 PM PST THIS EVENING...
...HAZARDOUS SEAS WARNING REMAINS IN EFFECT FROM 10 AM THIS
MORNING TO 4 AM PST TUESDAY...

* Winds...South winds increasing to 30 to 35 knots gusting to 45 
  knots this afternoon, then diminishing to southwest 15 to 25 KT 
  tonight.

* Seas...Steep seas initially dominated by west swells will 
  become mixed with choppy wind waves this afternoon, becoming 
  very steep at 15 to 18 feet this afternoon...then subside to 14 
  to 15 feet Tuesday afternoon. 

* Areas affected and timing...All areas will be affected, though
  the heaviest seas will be beyond 10 NM of the coast.

* View the hazard area in detail at 
  https://www.wrh.noaa.gov/mfr/hazard 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Hazardous Seas Warning means very steep and 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.

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 Small Craft Advisory for hazardous seas means that waves will
be steep enough to create a potential hazard to smaller vessels
and inexperienced mariners.

&&

$$


http://www.weather.gov/medford

646 
WHUS76 KMFR 152230
MWWMFR

URGENT - MARINE WEATHER MESSAGE
National Weather Service Medford OR
230 PM PST Mon Jan 15 2018

...High winds and heavy seas through the week...

PZZ370-161130-
/O.EXT.KMFR.GL.W.0003.000000T0000Z-180116T0300Z/
/O.EXT.KMFR.SE.W.0004.000000T0000Z-180116T0900Z/
/O.EXT.KMFR.SW.Y.0006.180116T0900Z-180117T1500Z/
/O.NEW.KMFR.GL.A.0002.180117T1500Z-180118T0300Z/
/O.NEW.KMFR.SR.A.0001.180117T1500Z-180118T0300Z/
Waters from Florence to Cape Blanco OR from 10 to 60 nm-
230 PM PST Mon Jan 15 2018

...GALE WARNING NOW IN EFFECT UNTIL 7 PM PST THIS EVENING...
...HAZARDOUS SEAS WARNING NOW IN EFFECT UNTIL 1 AM PST TUESDAY...
...STORM WATCH IN EFFECT FROM WEDNESDAY MORNING THROUGH WEDNESDAY
   EVENING...
...SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS NOW IN EFFECT FROM
   1 AM TUESDAY TO 7 AM PST WEDNESDAY...

The National Weather Service in Medford has issued a Gale Watch...
which is in effect from Wednesday morning through Wednesday
evening. A Storm Watch has also been issued. This Storm Watch is
in effect from Wednesday morning through Wednesday evening. 

* Winds...South winds 30 to 35 knots gusting to 45 knots,
  diminishing to southwest 15 to 25 KT tonight. South winds may
  increase to 40 to 50 KT Wednesday.

* Seas...A mix of wind waves and swell will make for very steep
  seas 20 to 22 feet through this evening. Seas will then become
  dominated by southwest to west swell, subsiding to 16 feet by
  Tuesday morning. Seas will remain heavy into Wednesday, when
  they may build as high as 30 feet. 

* Areas affected and timing...All areas will be affected.

* View the hazard area in detail at 
  https://www.wrh.noaa.gov/mfr/hazard 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Hazardous Seas Warning means very steep and 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.

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 Small Craft Advisory for hazardous seas means that waves will
be steep enough to create a potential hazard to smaller vessels
and inexperienced mariners.

A Gale Watch is issued when the risk of gale force winds of 34 to
47 knots has significantly increased, but the specific timing
and/or location is still uncertain. It is intended to provide
additional lead time for mariners who may wish to consider
altering their plans.

A Storm Watch is issued when the risk of storm force winds of
48 to 63 knots has significantly increased, but the specific
timing and/or location is still uncertain.  It is intended to
provide additional lead time for mariners who may wish to
consider altering their plans.

&&

$$

PZZ350-356-161130-
/O.EXT.KMFR.GL.W.0003.000000T0000Z-180116T0300Z/
/O.EXT.KMFR.SE.W.0003.000000T0000Z-180116T0900Z/
/O.EXT.KMFR.SW.Y.0006.180116T0900Z-180117T1500Z/
/O.NEW.KMFR.GL.A.0002.180117T1500Z-180118T0300Z/
Coastal waters from Florence to Cape Blanco OR out 10 nm-
Coastal waters from Cape Blanco OR to Pt. St. George CA out 10 nm-
230 PM PST Mon Jan 15 2018

...GALE WARNING NOW IN EFFECT UNTIL 7 PM PST THIS EVENING...
...HAZARDOUS SEAS WARNING NOW IN EFFECT UNTIL 1 AM PST TUESDAY...
...GALE WATCH IN EFFECT FROM WEDNESDAY MORNING THROUGH WEDNESDAY
   EVENING...
...SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS NOW IN EFFECT FROM
   1 AM TUESDAY TO 7 AM PST WEDNESDAY...

The National Weather Service in Medford has issued a Gale Watch...
which is in effect from Wednesday morning through Wednesday
evening. 

* Winds...South winds 30 to 35 knots gusting to 45 knots,
  diminishing to southwest 15 to 25 KT tonight. South winds may
  increase to 30 to 40 KT Wednesday.

* Seas...A mix of wind waves and swell will make for very steep
  seas 16 to 20 feet through this evening. Seas will then become
  dominated by southwest to west swell, subsiding to 15 to 16 feet
  by Tuesday morning. Seas will remain heavy into Wednesday, when
  they may build as high as 26 feet. 

* Areas affected and timing...The strongest winds and heaviest 
  seas will occur beyond 5 NM of the coast around Cape Blanco. 

* View the hazard area in detail at 
  https://www.wrh.noaa.gov/mfr/hazard 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Hazardous Seas Warning means very steep and 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.

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 Small Craft Advisory for hazardous seas means that waves will
be steep enough to create a potential hazard to smaller vessels
and inexperienced mariners.

A Gale Watch is issued when the risk of gale force winds of 34 to
47 knots has significantly increased, but the specific timing
and/or location is still uncertain. It is intended to provide
additional lead time for mariners who may wish to consider
altering their plans.

&&

$$

PZZ376-161130-
/O.EXT.KMFR.GL.W.0003.000000T0000Z-180116T0300Z/
/O.EXT.KMFR.SE.W.0004.000000T0000Z-180116T0900Z/
/O.EXT.KMFR.SW.Y.0006.180116T0900Z-180117T1500Z/
/O.NEW.KMFR.GL.A.0002.180117T1500Z-180118T0300Z/
Waters from Cape Blanco OR to Pt. St. George CA from 10 to 60 nm-
230 PM PST Mon Jan 15 2018

...GALE WARNING NOW IN EFFECT UNTIL 7 PM PST THIS EVENING...
...HAZARDOUS SEAS WARNING NOW IN EFFECT UNTIL 1 AM PST TUESDAY...
...GALE WATCH IN EFFECT FROM WEDNESDAY MORNING THROUGH WEDNESDAY
   EVENING...
...SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS NOW IN EFFECT FROM
   1 AM TUESDAY TO 7 AM PST WEDNESDAY...

The National Weather Service in Medford has issued a Gale Watch...
which is in effect from Wednesday morning through Wednesday
evening. 

* Winds...South winds 30 to 35 knots gusting to 45 knots,
  diminishing to southwest 15 to 25 KT tonight. South winds may
  increase to 35 to 45 KT Wednesday.

* Seas...A mix of wind waves and swell will make for very steep
  seas 17 to 21 feet through this evening. Seas will then become 
  dominated by southwest to west swell, subsiding to 15 to 16 feet
  by Tuesday morning. Seas will remain heavy into Wednesday, when
  they may build as high as 26 feet. 

* Areas affected and timing...All areas will be affected.
 
* View the hazard area in detail at 
  https://www.wrh.noaa.gov/mfr/hazard 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Hazardous Seas Warning means very steep and 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.

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 Small Craft Advisory for hazardous seas means that waves will
be steep enough to create a potential hazard to smaller vessels
and inexperienced mariners.

A Gale Watch is issued when the risk of gale force winds of 34 to
47 knots has significantly increased, but the specific timing
and/or location is still uncertain. It is intended to provide
additional lead time for mariners who may wish to consider
altering their plans.

&&

$$

http://www.weather.gov/medford

Area Forecast Discussion
National Weather Service Medford OR
942 AM PST Sat Jan 13 2018

.AVIATION...13/18Z TAF CYCLE...Dense fog with LIFR visibilities
continues to affect inland valleys, including KRBG and KMFR. The
fog layer is only about 800 feet deep, but the morning sounding
showed that the temperature inversion is very strong. The latest
statistical guidance is very pessimistic about fog burnoff.
Nevertheless, fog typically gradually lifts and then breaks up, so
we still expect it to burn off today, but it is probably going to
take until mid- to late-afternoon (13/20Z at the earliest) until
it does so. -Wright

&&

.PREV DISCUSSION... /Issued 915 AM PST Sat Jan 13 2018/

DISCUSSION...There are areas of valley fog and freezing fog this
morning due to a shallow inversion with a sharp temperature
gradient in place this morning. A dense fog advisory remains in
effect through 10 AM. The shallowness will allow for slow
improvement with Siskiyou County, east side, and Jackson County
valleys likely to clear by late morning or early afternoon. There
is a likelihood of patches of fog persisting through the day near
Roseburg and Grants Pass. The forecast has been updated to reflect
a slower improvement of conditions. The sky condition is forecast
to behave similarly tonight into Sunday with mostly clear skies
except for areas of west side valley fog. East of the Cascades,
gradual drying of the air mass is expected to be sufficient to
prevent fog development.

MARINE...Updated 800 AM PST Saturday 13 Jan 2018...With weak high
pressure over the waters, winds will be relatively light through
tonight. West swell dominated seas will continue, but heights will
be just below advisory levels through tonight.

Conditions over the waters will become active again beginning
Sunday, and then as the door to the stormy Pacific swings open, it
will remain very active through the remainder of the forecast
period. South winds pick up Sunday as a weak front moves through,
and conditions will ramp up to small craft advisory for hazardous
seas as the first of many hefty swell trains arrives behind this
front. Monday looks particularly stormy as a much stronger
front moves through with near gale force south winds and wind driven
seas. Another powerful, medium period swell follows behind this
front Monday night and Tuesday.

Yet another front with south gales is possible some time Wednesday
or Wednesday night. Background swell will remain fairly powerful
during this frontal passage, and the combination of swell and wind
waves may make for very large seas. Behind this front on Thursday,
models are currently indicating an extremely powerful, long period
swell moving in. Latest guidance shows the possibility of west
swells between 30 and 35 feet with a period of 17 seconds Wednesday
night into Thursday. Given that this is still a week out, confidence
in the exact numbers is not high, but if this were to occur, it
would be the largest swell we've seen since December 10, 2015.
Swells that day peaked at 35 feet 16 seconds. The highest swells on
record for buoy 15 occurred on December 3, 2007 when swells peaked
at 40 feet with a dominant period of 14 seconds. Both of these
swells were preceded by gales and were probably very fresh, but the
length of their periods suggests they were indeed, swell.

Again, we are NOT saying that such an enormous swell is definitely
going to happen, but rather this is something to keep an close eye
on as we move through the week. The fronts (and associated
winds/seas) expected Sunday/Monday and again Wednesday are of more
immediate concern. -Wright

PREV DISCUSSION... /Issued 542 AM PST Sat Jan 13 2018/

UPDATE...Areas of dense fog have developed early this morning in
many western valleys, including portions of the Rogue, Illinois
and Umpqua valleys. Localized freezing fog is also possible in the
Rogue Valley, including in Medford. Visibilities of a quarter
mile or less are expected in dense this morning and will result in
difficult driving conditions. Area roadways will be affected by
dense fog including portions of Interstate 5 from Medford to
Roseburg, Highway 199 from Grants Pass to O'Brien and Highway 234
in the Sams Valley as well as other surrounding roadways. A dense
fog advisory is in effect this morning. Please see NPWMFR for
details. Drivers on area roadways should take extra precautions
when driving in fog including:

* Slow down and allow for plenty of room between you and other
  vehicles.

* Fog makes objects appear farther away than they are.

* Use low beams. High beams reflect back thick fog, making
  visibility worse for you and other drivers.

* Be prepared. Keep your headlights clean. That way, you're
  ready for low-visibility conditions

* Don't use cruise control. Most crashes occur because the
  driver is going too fast for weather conditions.

Given the strong subsidence inversion in place today, expect
dense fog to persist through mid morning with gradual improvement
in the late morning and early afternoon. Of note, with little
change in the ridge pattern over the next 36 hours, we may see
areas of dense fog redevelop again late tonight and Sunday morning
in western valleys and impact roadways once again early Sunday.

SHORT TERM...An upper level ridge is over the region and will
continue to strengthen today. This ridge is expected to persist
over the region through Sunday resulting in dry weather and areas
of morning valley fog. The ridge will weaken and begin to shift
eastward on Sunday night. A front will approach the area and
move into coastal areas Monday morning. Models show this front
weakening as it moves inland. Additional stronger fronts will
follow through late in the week as an active jet stream takes aim
at the area.

Today through Sunday, expect dry weather across the area. Valley
fog has developed west of the Southern Oregon Cascades and in
western Siskiyou valleys and will persist through the morning.
Patchy valley fog is expected for areas east of the Cascades. The
timing of fog lifting and clearing is the main variable affecting
temperatures today. Expect gradual clearing of valley fog to
occur in the late morning and early afternoon hours. For areas
where fog or low clouds may into the afternoon, such as in
portions of the Rogue, Applegate, Illinois and Umpqua valleys,
have leaned towards the lower end of guidance for temperatures
today. Meanwhile, over the mountains and along the coast, expect
breezy offshore east to southeast flow today with relatively warm
temperatures and clear to mostly clear skies. Of note, some brief
morning fog is possible in some coastal areas, including near Coos
Bay but expect offshore flow to result in drying and clearing by
late this morning. With the ridge remaining in place, expect
similar conditions on Sunday.

On Monday, the concern shifts to a front approaching the coast
then gradually moving inland Monday afternoon and evening. Models
have trended slower with the front and have trended downward on
precipitation amounts. Overall, expect widespread light to
locally moderate precipitation along the coast beginning Monday
morning. Model solutions then support areas of light precipitation
spreading inland Monday afternoon and evening with the best chance
for rain from the Cascades west. Of note, breezy to gusty
southerly winds may limit precipitation in some western valleys,
especially the Shasta Valley and portions of the Rogue Valley.
Snow levels will remain high Monday with snow levels of around
6500 to 7500 feet. While this system on Monday will not be a heavy
rain producer, it will bring the potential for strong gusty winds
on Monday. Strong gusty south to southeast winds are expected
ahead of this front over the mountains and in the Shasta Valley.
Additionally gusty southerly winds are forecast to develop across
some east side areas, especially in the mountains and near Summer
Lake. Winds gusting to 40 to 50 mph are possible in the Shasta
Valley and Summer Lake areas as well as over the mountains as this
front pushes inland Monday. Also breezy southeast winds are
possible in the southern Rogue Valley.

In the extended forecast...additional stronger fronts are
expected to move into the area Monday night through Thursday. Each
front is expected to be progressively stronger and wetter. This
is followed by a cold and moist upper trough bringing widespread
rain and snow showers to the area late Thursday through Friday.
Will need to monitor this trough for the potential to bring
significant snow in the mountains. Periods of strong winds are
also possible through next week ahead of and with these frontal
systems. Also these storms may bring high surf conditions along
the Southern Oregon coast Monday night and Tuesday with increasing
chances for high surf late Wednesday through Friday.

PREV LONG TERM DISCUSSION... /Issued 315 PM PST Fri Jan 12 2018/

LONG TERM...Tuesday morning through Friday night...The extended
period will be a much more active period, especially when compared
to the meager winter we've experienced so far. The models are in
general agreement on the pattern albeit with the same differences
as previous model runs. The GFS remains the wetter and faster
solution compared to the EC and have maintained a blend of the EC
and GFS solutions with a lean towards the EC timing and
precipitation amounts. Overall there weren't many changes made to
the extended forecast.

Tuesday will likely start off as a rainy day, but transition to a
showery pattern as the upper level trough moves over the forecast
area Tuesday afternoon. Snow levels of around 6,000 feet Tuesday
morning will lower with the trough passage down to around 5,000 feet
Tuesday afternoon and down to around 4,000 feet Tuesday evening.
Showers will be diminishing Tuesday afternoon before snow levels
lower to 4,000 feet so any snow impacts should be minimal. There
will be a brief break in between systems overnight Tuesday into
Wednesday morning.

With the GFS being the faster solution with the next system, it
would have precipitation over the area by early Wednesday morning
while the EC holds off until late Wednesday afternoon. Either way,
both models are indicating that this system will be more impactful
than the previous system. Snow levels briefly come up to around
7,000 feet ahead of the incoming system, but will quickly drop back
to around 4500 feet by early Thursday morning as the upper level
trough moves through. Precipitation will continue with the trough
passage through Thursday night. While this equates to possible snow
impacts for higher passes, including Siskiyou Summit, it will be
much welcomed in terms of building snow pack and for those
interested in winter activities. Winds will be stronger with this
system. However, with model differences on the strength and timing
of these systems, it's difficult to be confident on the magnitude.
Currently it does look like at least advisory criteria will be
possible in the typical windy locations late Wednesday night into
Thursday.

Numerous showers will continue under swift northwest flow through
Friday with snow levels hovering around 3000 feet. Showers will
begin to taper off Friday night as a ridge begins to build in.

The question that naturally follows after mentioning another ridge
in winter is "will the active pattern continue?" The deterministic
solutions offer little guidance beyond this time frame as the GFS
would maintain the ridge through at least the following Monday while
the EC quickly pushes the ridge to the east, bringing another system
through by Sunday night. The ensembles however, support a more
progressive solution, which is also what the Climate Prediction
Center is indicating in their 8-14 day outlook (Jan 18th - Jan 25th)
with increased chances for above normal precipitation and below
normal temperatures. /BR-y

&&

.MFR WATCHES/WARNINGS/ADVISORIES...
OR...Dense Fog Advisory until 10 AM PST this morning for
     ORZ021-023>026.

CA...None.

Pacific Coastal Waters...Hazardous Seas Watch from late Sunday night
     through Tuesday evening for PZZ350-356-370-376.
     Small Craft Advisory for hazardous seas from 10 AM Sunday to 4
     AM PST Monday for PZZ350-356-370-376.