Alert archive / Oregon / Hazardous Seas Warnings in 2022

Hazardous Seas Warning 21, NWS Medford, OR

April 9, 2022

NWS Medford, OR issued this hazardous seas warning at Apr 9, 2022, 2:20 PM PDT. It took effect at Apr 11, 2022, 5:00 PM PDT. It was in force for 24 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Apr 9, 2022, 2:20 PM PDT (21:20 UTC)
In effect from
Apr 11, 2022, 5:00 PM PDT
Expired
Apr 12, 2022, 5:00 PM PDT
In force
24 hr
Issued by
NWS Medford, OR

The text

As transmitted.

628 
WHUS76 KMFR 092120
MWWMFR

URGENT - MARINE WEATHER MESSAGE
National Weather Service Medford OR
220 PM PDT Sat Apr 9 2022

PZZ356-376-101200-
/O.CON.KMFR.SE.W.0020.000000T0000Z-220410T0600Z/
/O.CON.KMFR.SC.Y.0043.000000T0000Z-220411T0600Z/
/O.UPG.KMFR.GL.A.0008.220411T0600Z-220411T1400Z/
/O.NEW.KMFR.GL.W.0009.220411T0600Z-220411T2100Z/
/O.NEW.KMFR.SE.W.0021.220411T2100Z-220413T0000Z/
Coastal waters from Cape Blanco OR to Pt. St. George CA out 10 nm-
Waters from Cape Blanco OR to Pt. St. George CA from 10 to 60 nm-
220 PM PDT Sat Apr 9 2022

...HAZARDOUS SEAS WARNING REMAINS IN EFFECT UNTIL 11 PM PDT THIS
EVENING...
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 11 PM PDT
SUNDAY...
...GALE WARNING IN EFFECT FROM 11 PM SUNDAY TO 2 PM PDT MONDAY...
...HAZARDOUS SEAS WARNING IN EFFECT FROM 2 PM MONDAY TO 5 PM PDT
TUESDAY...

* WHAT...For first the Hazardous Seas Warning, very steep and
  hazardous seas 10 to 13 ft at 10 seconds, highest near Pt. St.
  George. For the Gale Warning, west winds 25 to 35 kt with gusts
  up to 45 kt and seas 15 to 20 ft at 11 seconds expected. For 
  the second Hazardous Seas Warning, very steep and hazardous seas
  16 to 21 ft at 12 seconds expected. For the Small Craft 
  Advisory, northwest winds 15 to 25 kt with gusts up to 35 kt and
  seas 7 to 12 ft at 10 seconds.

* WHERE...Hazardous Seas Warning for areas beyond 2 NM from shore
  south of Gold Beach. Gale Warning mainly north of Gold Beach.
  Advisory conditions otherwise.

* WHEN...Hazardous Seas Warning until 11 PM PDT this evening. Gale
  Warning 11 PM Sunday to 2 PM PDT Monday. Hazardous Seas Warning
  2 PM Monday to 5 PM PDT Tuesday. Small Craft Advisory until 11 
  PM PDT Sunday.

* IMPACTS...Strong winds and very steep seas could capsize or 
  damage vessels. Low visibility conditions are expected.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid strong winds and very steep
seas. Remain in port, seek safe harbor, alter course, and/or
secure the vessel for severe conditions.

&&

$$

PZZ350-370-101200-
/O.CON.KMFR.SC.Y.0043.000000T0000Z-220411T0600Z/
/O.UPG.KMFR.GL.A.0008.220411T0600Z-220411T1400Z/
/O.NEW.KMFR.GL.W.0009.220411T0600Z-220411T2100Z/
/O.NEW.KMFR.SE.W.0021.220411T2100Z-220413T0000Z/
Coastal waters from Florence to Cape Blanco OR out 10 nm-
Waters from Florence to Cape Blanco OR from 10 to 60 nm-
220 PM PDT Sat Apr 9 2022

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 11 PM PDT
SUNDAY...
...GALE WARNING IN EFFECT FROM 11 PM SUNDAY TO 2 PM PDT MONDAY...
...HAZARDOUS SEAS WARNING IN EFFECT FROM 2 PM MONDAY TO 5 PM PDT
TUESDAY...

* WHAT...For the Gale Warning, south winds 25 to 35 kt with gusts
  up to 50 kt shifting west Monday. Seas 16 to 21 ft at 11
  seconds. For the Hazardous Seas Warning, very steep and
  hazardous seas 15 to 20 ft at 12 seconds expected. For the Small
  Craft Advisory, south winds 20 to 30 kt with gusts up to 35 kt 
  and seas 8 to 11 ft at 10 seconds.

* WHERE...All areas.

* WHEN...Gale Warning 11 PM Sunday to 2 PM PDT Monday. Hazardous
  Seas Warning 2 PM Monday to 5 PM PDT Tuesday. Small Craft
  Advisory until 11 PM PDT Sunday.

* IMPACTS...Strong winds and very steep seas could capsize or 
  damage vessels. Low visibility conditions are expected.

* ADDITIONAL INFORMATION...The strongest winds and steepest seas 
  will be south of Cape Blanco.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid strong winds and very steep
seas. Remain in port, seek safe harbor, alter course, and/or
secure the vessel for severe conditions.

&&

$$

Stavish

Visit us at https://www.weather.gov/Medford
9 follow-up statements
790 
WHUS76 KMFR 092152
MWWMFR

URGENT - MARINE WEATHER MESSAGE
National Weather Service Medford OR
252 PM PDT Sat Apr 9 2022

PZZ356-376-101100-
/O.CON.KMFR.SE.W.0020.000000T0000Z-220410T0600Z/
/O.CON.KMFR.SC.Y.0043.000000T0000Z-220411T0600Z/
/O.CON.KMFR.GL.W.0009.220411T0600Z-220411T2100Z/
/O.CON.KMFR.SE.W.0021.220411T2100Z-220413T0000Z/
Coastal waters from Cape Blanco OR to Pt. St. George CA out 10 nm-
Waters from Cape Blanco OR to Pt. St. George CA from 10 to 60 nm-
252 PM PDT Sat Apr 9 2022

...HAZARDOUS SEAS WARNING REMAINS IN EFFECT UNTIL 11 PM PDT THIS
EVENING...
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 11 PM PDT
SUNDAY...
...GALE WARNING REMAINS IN EFFECT FROM 11 PM SUNDAY TO 2 PM PDT
MONDAY...
...HAZARDOUS SEAS WARNING REMAINS IN EFFECT FROM 2 PM MONDAY TO
5 PM PDT TUESDAY...

* WHAT...For first the Hazardous Seas Warning, very steep and 
  hazardous seas 10 to 13 ft at 10 seconds, highest near Pt. St. 
  George. For the Gale Warning, west winds 25 to 35 kt with 
  gusts up to 45 kt and seas 15 to 20 ft at 11 seconds expected. 
  For the second Hazardous Seas Warning, very steep and 
  hazardous seas 16 to 21 ft at 12 seconds expected. For the 
  Small Craft Advisory, northwest winds 15 to 25 kt with gusts 
  up to 35 kt and seas 7 to 12 ft at 10 seconds.

* WHERE...Hazardous Seas Warning for areas beyond 2 NM from 
  shore south of Gold Beach. Gale Warning mainly north of Gold 
  Beach. Advisory conditions otherwise.

* WHEN...Hazardous Seas Warning until 11 PM PDT this evening. 
  Gale Warning 11 PM Sunday to 2 PM PDT Monday. Hazardous Seas 
  Warning 2 PM Monday to 5 PM PDT Tuesday. Small Craft Advisory 
  until 11 PM PDT Sunday.

* IMPACTS...Strong winds and very steep seas could capsize or 
  damage vessels. Low visibility conditions are expected.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid strong winds and very steep
seas. Remain in port, seek safe harbor, alter course, and/or
secure the vessel for severe conditions.

&&

$$

PZZ350-370-101100-
/O.CON.KMFR.SC.Y.0043.000000T0000Z-220411T0600Z/
/O.CON.KMFR.GL.W.0009.220411T0600Z-220411T2100Z/
/O.CON.KMFR.SE.W.0021.220411T2100Z-220413T0000Z/
Coastal waters from Florence to Cape Blanco OR out 10 nm-
Waters from Florence to Cape Blanco OR from 10 to 60 nm-
252 PM PDT Sat Apr 9 2022

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 11 PM PDT
SUNDAY...
...GALE WARNING REMAINS IN EFFECT FROM 11 PM SUNDAY TO 2 PM PDT
MONDAY...
...HAZARDOUS SEAS WARNING REMAINS IN EFFECT FROM 2 PM MONDAY TO
5 PM PDT TUESDAY...

* WHAT...For the Gale Warning, south winds 25 to 35 kt with gusts
  up to 50 kt, shifting west Monday. Near storm-force gusts
  possible. Seas 16 to 21 ft at 11 seconds. For the Hazardous 
  Seas Warning, very steep and hazardous seas 15 to 20 ft at 12 
  seconds expected. For the Small Craft Advisory, south winds 20 
  to 30 kt with gusts up to 35 kt and seas 8 to 11 ft at 10 
  seconds.

* WHERE...All areas.

* WHEN...Gale Warning 11 PM Sunday to 2 PM PDT Monday. Hazardous 
  Seas Warning 2 PM Monday to 5 PM PDT Tuesday. Small Craft 
  Advisory until 11 PM PDT Sunday.

* IMPACTS...Strong winds and very steep seas could capsize or 
  damage vessels. Low visibility conditions are expected.

* ADDITIONAL INFORMATION...The strongest winds and steepest seas 
  will be south of Cape Blanco.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid strong winds and very steep
seas. Remain in port, seek safe harbor, alter course, and/or
secure the vessel for severe conditions.

&&

$$

Visit us at https://www.weather.gov/Medford
781 
WHUS76 KMFR 100949
MWWMFR

URGENT - MARINE WEATHER MESSAGE
National Weather Service Medford OR
249 AM PDT Sun Apr 10 2022

PZZ350-356-370-376-102300-
/O.EXT.KMFR.SC.Y.0043.000000T0000Z-220411T0300Z/
/O.EXT.KMFR.GL.W.0009.220411T0300Z-220411T2100Z/
/O.CON.KMFR.SE.W.0021.220411T2100Z-220413T0000Z/
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-
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-
249 AM PDT Sun Apr 10 2022

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 8 PM PDT THIS
EVENING...
...GALE WARNING NOW IN EFFECT FROM 8 PM THIS EVENING TO 2 PM PDT
MONDAY...
...HAZARDOUS SEAS WARNING REMAINS IN EFFECT FROM 2 PM MONDAY TO
5 PM PDT TUESDAY...

* WHAT...For the Gale Warning, west winds 25 to 35 kt with gusts
  up to 45 kt and very steep seas 16 to 21 ft expected. For the
  Hazardous Seas Warning, very steep and hazardous seas 15 to 20
  ft at 12 seconds expected. For the Small Craft Advisory, seas 8
  to 9 ft at 10 seconds.

* WHERE...All areas.

* WHEN...For the Gale Warning, from 8 PM this evening to 2 PM 
  PDT Monday. For the Hazardous Seas Warning, from 2 PM Monday 
  to 5 PM PDT Tuesday. For the Small Craft Advisory, until 8 PM 
  PDT this evening.

* IMPACTS...Strong winds and very steep seas could capsize or 
  damage vessels. Low visibility conditions are expected.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid strong winds and very steep
seas. Remain in port, seek safe harbor, alter course, and/or
secure the vessel for severe conditions.

&&

$$

Visit us at https://www.weather.gov/Medford
456 
WHUS76 KMFR 102100
MWWMFR

URGENT - MARINE WEATHER MESSAGE
National Weather Service Medford OR
200 PM PDT Sun Apr 10 2022

PZZ350-356-370-376-111000-
/O.CON.KMFR.SC.Y.0043.000000T0000Z-220411T0300Z/
/O.CON.KMFR.GL.W.0009.220411T0300Z-220411T2100Z/
/O.CON.KMFR.SE.W.0021.220411T2100Z-220413T0000Z/
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-
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-
200 PM PDT Sun Apr 10 2022

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT THIS
EVENING...
...GALE WARNING REMAINS IN EFFECT FROM 8 PM THIS EVENING TO 2 PM
PDT MONDAY...
...HAZARDOUS SEAS WARNING REMAINS IN EFFECT FROM 2 PM MONDAY TO
5 PM PDT TUESDAY...

* WHAT...Steep seas of 7 to 9 ft through this evening, becoming
  very steep and quickly building to 12 to 15 ft tonight. West
  winds 15 to 25 kt through this evening, becoming southwest and
  increasing to gales 30 to 40 kt tonight, shifting to northwest
  late tonight. In the the meantime, seas become chaotic due to
  fresh swell, wind waves and northwest swell and build further 16
  to 20 ft by early Monday morning. 

* WHERE...All areas.

* WHEN...For the Small Craft Advisory, until 8 PM PDT this
  evening. For the Gale Warning, from 8 PM this evening to 2 PM 
  PDT Monday. For the Hazardous Seas Warning, from 2 PM Monday to 
  5 PM PDT Tuesday. 

* IMPACTS...Strong winds and very steep seas could capsize or 
  damage vessels. Low visibility conditions are expected.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid strong winds and very steep
seas. Remain in port, seek safe harbor, alter course, and/or
secure the vessel for severe conditions.

&&

$$

Visit us at https://www.weather.gov/Medford
763 
WHUS76 KMFR 110949
MWWMFR

URGENT - MARINE WEATHER MESSAGE
National Weather Service Medford OR
249 AM PDT Mon Apr 11 2022

PZZ350-356-370-376-112300-
/O.EXT.KMFR.GL.W.0009.000000T0000Z-220412T0000Z/
/O.EXT.KMFR.SE.W.0021.220412T0000Z-220413T0000Z/
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-
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-
249 AM PDT Mon Apr 11 2022

...GALE WARNING NOW IN EFFECT UNTIL 5 PM PDT THIS AFTERNOON...
...HAZARDOUS SEAS WARNING NOW IN EFFECT FROM 5 PM THIS AFTERNOON
TO 5 PM PDT TUESDAY...

* WHAT...Very steep and hazardous seas building to 15 to 18 ft 
  this morning and continuing at these levels into tonight. Winds 
  will shift early this morning from south gales to northwest 
  gales 30 to 35 kt. Thunderstorms with gusty and erratic winds 
  are possible this afternoon.

* WHERE...All areas.

* WHEN...For the Gale Warning, until 5 PM PDT this afternoon. 
  For the Hazardous Seas Warning, from 5 PM this afternoon to 5 
  PM PDT Tuesday.

* IMPACTS...Strong winds and very steep seas could capsize or 
  damage vessels. Low visibility conditions are expected.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid strong winds and very steep
seas. Remain in port, seek safe harbor, alter course, and/or
secure the vessel for severe conditions.

&&

$$

Visit us at https://www.weather.gov/Medford
851 
WHUS76 KMFR 112127
MWWMFR

URGENT - MARINE WEATHER MESSAGE
National Weather Service Medford OR
227 PM PDT Mon Apr 11 2022

PZZ356-376-121030-
/O.CON.KMFR.GL.W.0009.000000T0000Z-220412T0000Z/
/O.EXT.KMFR.SE.W.0021.220412T0000Z-220412T1800Z/
Coastal waters from Cape Blanco OR to Pt. St. George CA out 10 nm-
Waters from Cape Blanco OR to Pt. St. George CA from 10 to 60 nm-
227 PM PDT Mon Apr 11 2022

...GALE WARNING REMAINS IN EFFECT UNTIL 5 PM PDT THIS AFTERNOON...
...HAZARDOUS SEAS WARNING NOW IN EFFECT UNTIL 11 AM PDT TUESDAY...

* WHAT...Very steep, short period and hazardous seas 14 to 18 ft
  through this evening, gradually lowering to very steep seas of
  12 to 15 feet late tonight into Tuesday morning. Northwest gales
  30 to 35 kt will lower to northwest 25 to 30 kt this evening,
  then down to northwest 20 kt gusting to 30 kt tonight into
  Tuesday. Thunderstorms with gusty and erratic winds and small
  hail are possible this afternoon and Tuesday. Steep seas are 
  expected Tuesday afternoon into Wednesday.

* WHERE...All areas.

* WHEN...For the Gale Warning, until 5 PM PDT this afternoon. 
  For the Hazardous Seas Warning, until 11 AM PDT Tuesday.

* IMPACTS...Strong winds and very steep seas could capsize or 
  damage vessels. Low visibility conditions are expected.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid strong winds and very steep
seas. Remain in port, seek safe harbor, alter course, and/or
secure the vessel for severe conditions.

&&

$$

PZZ350-370-121030-
/O.CON.KMFR.GL.W.0009.000000T0000Z-220412T0000Z/
/O.CON.KMFR.SE.W.0021.220412T0000Z-220413T0000Z/
Coastal waters from Florence to Cape Blanco OR out 10 nm-
Waters from Florence to Cape Blanco OR from 10 to 60 nm-
227 PM PDT Mon Apr 11 2022

...GALE WARNING REMAINS IN EFFECT UNTIL 5 PM PDT THIS AFTERNOON...
...HAZARDOUS SEAS WARNING REMAINS IN EFFECT UNTIL 5 PM PDT
TUESDAY...

* WHAT...Very steep, short period and hazardous seas 14 to 18 ft
  through this evening, gradually lowering to very steep seas of 
  12 to 15 feet late tonight into Tuesday afternoon. Northwest 
  gales 30 to 35 kt will lower to northwest 25 to 30 kt this 
  evening, then down to northwest 15 to 20 kt gusting to 25 kt 
  tonight into Tuesday. Thunderstorms with gusty and erratic winds
  and small hail are possible this afternoon and Tuesday. Steep 
  seas are expected Tuesday evening into Wednesday.

* WHERE...All areas.

* WHEN...For the Gale Warning, until 5 PM PDT this afternoon. 
  For the Hazardous Seas Warning, from 5 PM this afternoon to 5 
  PM PDT Tuesday.

* IMPACTS...Strong winds and very steep seas could capsize or 
  damage vessels. Low visibility conditions are expected.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid strong winds and very steep
seas. Remain in port, seek safe harbor, alter course, and/or
secure the vessel for severe conditions.

&&

$$

Visit us at https://www.weather.gov/Medford
016 
WHUS76 KMFR 120005
MWWMFR

URGENT - MARINE WEATHER MESSAGE
National Weather Service Medford OR
505 PM PDT Mon Apr 11 2022

PZZ356-376-121315-
/O.EXP.KMFR.GL.W.0009.000000T0000Z-220412T0000Z/
/O.CON.KMFR.SE.W.0021.000000T0000Z-220412T1800Z/
Coastal waters from Cape Blanco OR to Pt. St. George CA out 10 nm-
Waters from Cape Blanco OR to Pt. St. George CA from 10 to 60 nm-
505 PM PDT Mon Apr 11 2022

...HAZARDOUS SEAS WARNING REMAINS IN EFFECT UNTIL 11 AM PDT
TUESDAY...

* WHAT...Very steep, short period and hazardous seas 14 to 18 ft
  through this evening, gradually lowering to very steep seas of
  12 to 15 feet late tonight into Tuesday morning. Northwest winds
  20 kt gusting to 30 kt tonight into Tuesday. Thunderstorms with
  gusty and erratic winds and small hail are possible early this
  evening and Tuesday afternoon. Steep seas are expected Tuesday 
  afternoon into Wednesday.

* WHERE...All areas.

* WHEN...Until 11 AM PDT Tuesday.

* IMPACTS...Very steep and hazardous seas could capsize or 
  damage vessels. Bar crossings will become especially 
  treacherous.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Recreational boaters should remain in port. Commercial vessels
should prepare for very steep seas and consider remaining in port
until conditions improve.

&&

$$

PZZ350-370-121315-
/O.EXP.KMFR.GL.W.0009.000000T0000Z-220412T0000Z/
/O.CON.KMFR.SE.W.0021.000000T0000Z-220413T0000Z/
Coastal waters from Florence to Cape Blanco OR out 10 nm-
Waters from Florence to Cape Blanco OR from 10 to 60 nm-
505 PM PDT Mon Apr 11 2022

...HAZARDOUS SEAS WARNING REMAINS IN EFFECT UNTIL 5 PM PDT
TUESDAY...

* WHAT...Very steep, short period and hazardous seas 14 to 18 ft
  through this evening, gradually lowering to very steep seas of
  12 to 15 feet late tonight into Tuesday afternoon. Northwest
  winds 25 to 30 kt this evening, then down to northwest 15 to 20
  kt gusting to 25 kt late tonight into Tuesday. Thunderstorms
  with gusty and erratic winds and small hail are possible early
  this evening and Tuesday afternoon. Steep seas are expected 
  Tuesday evening into Wednesday.

* WHERE...All areas.

* WHEN...Until 5 PM PDT Tuesday.

* IMPACTS...Very steep and hazardous seas could capsize or 
  damage vessels. Bar crossings will become especially 
  treacherous.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Recreational boaters should remain in port. Commercial vessels
should prepare for very steep seas and consider remaining in port
until conditions improve.

&&

$$

Visit us at https://www.weather.gov/Medford
714 
WHUS76 KMFR 120428
MWWMFR

URGENT - MARINE WEATHER MESSAGE
National Weather Service Medford OR
928 PM PDT Mon Apr 11 2022

PZZ356-376-121730-
/O.CON.KMFR.SE.W.0021.000000T0000Z-220412T1800Z/
/O.NEW.KMFR.SC.Y.0044.220412T1800Z-220414T0000Z/
Coastal waters from Cape Blanco OR to Pt. St. George CA out 10 nm-
Waters from Cape Blanco OR to Pt. St. George CA from 10 to 60 nm-
928 PM PDT Mon Apr 11 2022

...HAZARDOUS SEAS WARNING REMAINS IN EFFECT UNTIL 11 AM PDT
TUESDAY...
...SMALL CRAFT ADVISORY IN EFFECT FROM 11 AM TUESDAY TO 5 PM PDT
WEDNESDAY...

* WHAT...For the Hazardous Seas Warning, very steep and hazardous
  seas 15 to 18 ft at 11 seconds overnight diminishing to 12 to 14
  ft at 11 seconds Tuesday morning. For the Small Craft Advisory, 
  seas 9 to 11 ft at 11 seconds expected Tuesday afternoon through
  Wednesday afternoon.

* WHERE...All of the area.

* WHEN...For the Hazardous Seas Warning, until 11 AM PDT 
  Tuesday. For the Small Craft Advisory, from 11 AM Tuesday to 5 
  PM PDT Wednesday.

* IMPACTS...Very steep and hazardous seas could capsize or 
  damage vessels. Bar crossings will become especially 
  treacherous.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Recreational boaters should remain in port. Commercial vessels
should prepare for very steep seas and consider remaining in port
until conditions improve.

&&

$$

PZZ350-370-121730-
/O.CON.KMFR.SE.W.0021.000000T0000Z-220413T0000Z/
/O.NEW.KMFR.SC.Y.0044.220413T0000Z-220414T0000Z/
Coastal waters from Florence to Cape Blanco OR out 10 nm-
Waters from Florence to Cape Blanco OR from 10 to 60 nm-
928 PM PDT Mon Apr 11 2022

...HAZARDOUS SEAS WARNING REMAINS IN EFFECT UNTIL 5 PM PDT
TUESDAY...
...SMALL CRAFT ADVISORY IN EFFECT FROM 5 PM TUESDAY TO 5 PM PDT
WEDNESDAY...

* WHAT...For the Hazardous Seas Warning, very steep and hazardous
  seas 15 to 19 ft at 11 seconds overnight diminishing to 12 to 15
  ft at 11 seconds Tuesday. For the Small Craft Advisory, seas 9 
  to 11 ft at 11 seconds are expected Tuesday evening through 
  Wednesday afternoon.

* WHERE...All of the area.

* WHEN...For the Hazardous Seas Warning, until 5 PM PDT Tuesday. 
  For the Small Craft Advisory, from 5 PM Tuesday to 5 PM PDT 
  Wednesday.

* IMPACTS...Very steep and hazardous seas could capsize or 
  damage vessels. Bar crossings will become especially 
  treacherous.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Recreational boaters should remain in port. Commercial vessels
should prepare for very steep seas and consider remaining in port
until conditions improve.

&&

$$

Visit us at https://www.weather.gov/Medford
961 
WHUS76 KMFR 120941
MWWMFR

URGENT - MARINE WEATHER MESSAGE
National Weather Service Medford OR
241 AM PDT Tue Apr 12 2022

PZZ356-376-122300-
/O.CON.KMFR.SE.W.0021.000000T0000Z-220412T1800Z/
/O.CON.KMFR.SC.Y.0044.220412T1800Z-220414T0000Z/
Coastal waters from Cape Blanco OR to Pt. St. George CA out 10 nm-
Waters from Cape Blanco OR to Pt. St. George CA from 10 to 60 nm-
241 AM PDT Tue Apr 12 2022

...HAZARDOUS SEAS WARNING REMAINS IN EFFECT UNTIL 11 AM PDT THIS
MORNING...
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 11 AM THIS MORNING
TO 5 PM PDT WEDNESDAY...

* WHAT...For the Hazardous Seas Warning, very steep and hazardous
  seas 12 to 14 ft at 11 seconds. For the Small Craft Advisory,
  seas 9 to 11 ft at 11 seconds expected.

* WHERE...All of the area.

* WHEN...For the Hazardous Seas Warning, until 11 AM PDT 
  Tuesday. For the Small Craft Advisory, from 11 AM Tuesday to 5 
  PM PDT Wednesday.

* IMPACTS...Very steep and hazardous seas could capsize or 
  damage vessels. Bar crossings will become especially 
  treacherous.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Recreational boaters should remain in port. Commercial vessels
should prepare for very steep seas and consider remaining in port
until conditions improve.

&&

$$

PZZ350-370-122300-
/O.CON.KMFR.SE.W.0021.000000T0000Z-220413T0000Z/
/O.CON.KMFR.SC.Y.0044.220413T0000Z-220414T0000Z/
Coastal waters from Florence to Cape Blanco OR out 10 nm-
Waters from Florence to Cape Blanco OR from 10 to 60 nm-
241 AM PDT Tue Apr 12 2022

...HAZARDOUS SEAS WARNING REMAINS IN EFFECT UNTIL 5 PM PDT THIS
AFTERNOON...
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 5 PM THIS
AFTERNOON TO 5 PM PDT WEDNESDAY...

* WHAT...For the Hazardous Seas Warning, very steep and hazardous
  seas 12 to 15 ft at 11 seconds. For the Small Craft Advisory,
  seas 10 to 12 ft at 11 seconds are expected.

* WHERE...All of the area.

* WHEN...For the Hazardous Seas Warning, until 5 PM PDT Tuesday. 
  For the Small Craft Advisory, from 5 PM Tuesday to 5 PM PDT 
  Wednesday.

* IMPACTS...Very steep and hazardous seas could capsize or 
  damage vessels. Bar crossings will become especially 
  treacherous.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Recreational boaters should remain in port. Commercial vessels
should prepare for very steep seas and consider remaining in port
until conditions improve.

&&

$$

Visit us at https://www.weather.gov/Medford
724 
WHUS76 KMFR 122059
MWWMFR

URGENT - MARINE WEATHER MESSAGE
National Weather Service Medford OR
159 PM PDT Tue Apr 12 2022

PZZ350-370-131000-
/O.CON.KMFR.SE.W.0021.000000T0000Z-220413T0000Z/
/O.CON.KMFR.SC.Y.0044.220413T0000Z-220414T0000Z/
Coastal waters from Florence to Cape Blanco OR out 10 nm-
Waters from Florence to Cape Blanco OR from 10 to 60 nm-
159 PM PDT Tue Apr 12 2022

...HAZARDOUS SEAS WARNING REMAINS IN EFFECT UNTIL 5 PM PDT THIS
AFTERNOON...
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 5 PM THIS
AFTERNOON TO 5 PM PDT WEDNESDAY...

* WHAT...Very steep and hazardous seas around 12 ft through this
  afternoon. Seas subside some, but remain steep at 8 to 11 ft
  through Wednesday afternoon.

* WHERE...All areas.

* WHEN...For the Hazardous Seas Warning, until 5 PM PDT Tuesday. 
  For the Small Craft Advisory, from 5 PM Tuesday to 5 PM PDT 
  Wednesday.

* IMPACTS...Very steep and hazardous seas could capsize or 
  damage vessels. Bar crossings will become especially 
  treacherous.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Recreational boaters should remain in port. Commercial vessels
should prepare for very steep seas and consider remaining in port
until conditions improve.

&&

$$

PZZ356-376-131000-
/O.CON.KMFR.SC.Y.0044.000000T0000Z-220414T0000Z/
Coastal waters from Cape Blanco OR to Pt. St. George CA out 10 nm-
Waters from Cape Blanco OR to Pt. St. George CA from 10 to 60 nm-
159 PM PDT Tue Apr 12 2022

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 5 PM PDT
WEDNESDAY...

* WHAT...Steep seas 9 to 11 ft.

* WHERE...All areas.

* WHEN...Until 5 PM PDT Wednesday.

* IMPACTS...Very steep and hazardous seas could capsize or 
  damage vessels. Bar crossings will become especially 
  treacherous.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Recreational boaters should remain in port. Commercial vessels
should prepare for very steep seas and consider remaining in port
until conditions improve.

&&

$$

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

What forecasters said that day

The local office's own words before this hazardous seas warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Medford, OR wrote its last area forecast discussion before this hazardous seas warning went out at Apr 9, 8:36 AM PDT, 5 hours 44 minutes earlier.

Area forecast discussion, Apr 9, 8:36 AM PDT, 5 hours 44 minutes before
Area Forecast Discussion
National Weather Service Medford OR
836 AM PDT Sat Apr 9 2022

.DISCUSSION...The forecast remains mostly on track, a few
adjustments were made to the marine forecast however, the big
picture remains similar. Additionally, a few minor tweaks were
made to the cloud forecast going on right now to better match
satellite imagery.

Overall, expect today to be relatively benign if much chillier
than previous days. It is worth noting that temperatures may be a
few degrees warmer than what is in the forecast in areas that are
sunny, but the forecast should not be off by that much. More
details regarding our forecast are available in the previous
discussion below. -Schaaf

&&

.MARINE...Updated 800 AM PDT Sat, 9 April 2022...Gusty north
winds will persist today, strongest south of Cape Blanco where very
steep seas are expected. Winds and seas will lower some tonight into
Sunday but will remain steep. Another front is expected late Sunday
into Monday with very high seas possible, and confidence is growing
in the potential for gale force winds in at least some of the
coastal waters. We've issued a Gale Watch for all the coastal waters
for Sunday night. Latest data suggests the best potential for gales
is from Cape Blanco northward, but there is still significant
uncertainty in location and exact magnitude of winds. Gusty
northwest winds and steep seas could last into the middle of next
week during an active weather pattern. Keene

&&

.PREV DISCUSSION... /Issued 436 AM PDT Sat Apr 9 2022/

SYNOPSIS...One final day of weak synoptic forcing resulting in
light showers north of the Umpqua divide, from the Cascades west,
will prime the atmosphere for a low to bottom out as it approaches
the PNW coast. Sunday night through Monday, this bottoming low
will bring winter impacts in the form of wet-heavy snow from high
mountain passes down to low elevations, very gusty winds across
the whole region, freezing overnight temperatures, and a moderate-
to-high chance for wetting rains even east of the Cascades. An
active pattern is expected to continue the remainder of the week.

DISCUSSION...Model solutions have begun to converge onto a
similar solution for the time period of Sunday night through
Monday night. The discussion will focus on this time period and on
today.

Today, Saturday April 9, diffuse energy being wrapped into the
backside of a trough, which is redeveloping in the lee-side of the
Rockies will cause some of the energy to drift over the region
today. This will continue a slight chance of light rain showers
and elevated afternoon winds.

The light showers are expected north of the Umpqua divide, from
the Cascades west. Yesterday these showers resulted in 0.02 inches
in the Cascades to 0.14 inches in the north coast range, and
roughly 0.1 inch in the Coos County low lands. Light amounts were
also reported along the coast in Curry county. It seems reasonable
that similar amounts will accumulate today. Winds will again be
breezy in the afternoon west of the Cascades and on the gustier
side to the east; where blowing dust will again be possible down
wind of dry lake beds.

The wrapping of energy into the low to the east reinforces
uniform northwest flow throughout the entire troposphere. A
stacked jet of 150 kts in the upper levels will serve as the
source of energy for an area of low pressure to develop under and
intensify as it moves towards the PNW. The low will begin to
bottom out between 990 to 1005 mb Sunday night with increasing
confidence of landfall between Cape Blanco and the OR/WA state
line. However this consensus has only developed in the latest
model runs and, given the high variability in previous runs, we
are holding off on any advisory/warning products to see if this
converging solution holds.

Assuming the solutions continue to converge on a deepening low
making landfall along the central or northern Oregon coast, we can
expect an impactful period of wet, snowy, and windy weather from
Sunday night through Monday, April 11. Impacts will range from
heavy, wet snow accumulating above roughly 2500 feet in eastern
Douglas County, northeastern Jackson County, the coast range &
western Siskiyou County, and the Cascades that near or exceed one
foot. Gusty south winds at the coast from a likely southerly jet,
and unyielding gusty west winds will also be present. Combined,
the winds and snow could really drive some hazardous conditions as
the snow will be likely to stick to tree limbs and other vertical
structures, while the winds push on the now weighed down
structures. This has the potential to cause damage in the form of
downed limbs, trees, power lines and hazardous driving conditions.

Additional hazards may also be present, though are not
necessarily included in the forecast at this time because they
tend to be more isolated in nature or where they might exist is
still unknown. However, we can describe what they may be. Like,
convective showers producing accumulating amounts of ball bearing-
like graupel that can create very slick surfaces and even a low
chance for a lightning strike or two. Or, that this storm track
favors the influx of an arctic airmass that could bring overnight
lows Monday and Tuesday night 5 to 10 degrees below normal; and
below freezing in many west side valleys. There is also the
generalized impact of heavy rains and wind that won't bring much
impact to river conditions, but will make driving more hazardous.

As mentioned earlier, these impacts are conditional upon an
intensifying low moving onshore north of Cape Blanco. There still
remains some solutions that bring a weaker low south of Cape
Blanco. This would result in a drier but colder event, with
overall less precipitation due to the more offshore flow overhead
and the absence of stronger dynamics (thus weaker winds overall).
However, snow levels would be much lower, and this would result
in the potential for valley snow (although the prospects for any
of it sticking are highly questionable).

It is important to recognize the possibility of this alternative
solution because the forecast reflects a low moving onshore north
of Cape Blanco but, we do not want to advertise that this is a
sure thing just yet.   -Miles

A note from the previous discussion on the extended forecast:
The "fun" aspect of this forecast is that this is the first low in
what appears to be a generally cooler and wetter pattern that will
persist throughout the remainder of the forecast term, and with
such low confidence in the forecast for this first system, it is
difficult to nail down any confidence in the following systems
within this new pattern. As a result, have leaned leaned heavily
on the NBM guidance for the remainder of the week, keeping
temperatures cooler than normal for this time of year, and
maintaining at least a slight chance of precipitation throughout.
-BPN

AVIATION...09/12Z TAFs...VFR conditions are expected to prevail
through most of the TAF period (through this evening), though areas
of MVFR cigs are possible in West Side valleys like the Rogue and
Umpqua, at times, through this morning. Gusty are expected to return
again this afternoon. By late tonight, rain, MVFR ceilings, and
mountain obscuration will reach the coast and Coast Range as a front
pushes into the forecast area. Keene

&&

.MFR WATCHES/WARNINGS/ADVISORIES...
OR...
CA...None.

Pacific Coastal Waters...
     Gale Watch from Sunday evening through Monday morning for
     PZZ350-356-370-376.
     Small Craft Advisory until 11 PM PDT Sunday for
     PZZ350-356-370-376.
     Hazardous Seas Warning until 11 PM PDT this evening for
     PZZ356-376.

The office that day

Everything else NWS Medford, OR issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 9, 2:42 AM PDTGale WatchMFR12 hr
Apr 9, 2:42 AM PDTHazardous Seas WarningMFR20 hr
Apr 9, 2:20 PM PDTGale WarningMFR51 hr
Apr 9, 2:33 PM PDTHigh Wind WarningMFRCoos, Curry, Douglas, Klamath, Lake55 hr
Apr 9, 2:33 PM PDTWind AdvisoryMFRCoos, Curry, Douglas, Josephine, Klamath, Lake55 hr
Apr 9, 2:33 PM PDTWinter Storm WarningMFRCurry, Douglas, Jackson, Josephine, Klamath4 days
Apr 9, 2:33 PM PDTWinter Weather AdvisoryMFRCoos, Curry, Douglas, Jackson, Josephine, Klamath and 1 more5 days

Nearby

Hazardous Seas Warnings in Oregon, 2022Every hazardous seas warning in 2022

Sources

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