Alert archive / California / Hard Freeze Warnings in 2020

Hard Freeze Warning 3, NWS Eureka, CA

October 25, 20204 counties in California

NWS Eureka, CA issued this hard freeze warning at Oct 25, 2020, 4:44 AM PDT for 4 counties in California. It took effect at Oct 26, 2020, 2:00 AM PDT. It was in force for 7 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
Oct 25, 2020, 4:44 AM PDT (11:44 UTC)
In effect from
Oct 26, 2020, 2:00 AM PDT
Expired
Oct 26, 2020, 9:00 AM PDT
In force
7 hr
Issued by
NWS Eureka, CA

Counties Humboldt County, CA, Lake County, CA, Mendocino County, CA, Trinity County, CA

The radar

The Eureka (Bunker Hill) radar (KBHX), 102 km from the middle of the area, began a volume at 11:50 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Oakland, CA (KOAK), launched 00:00Z, 11.7 hours before the alert went out and 267 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Oakland, CA at 00:00Z on 2020-10-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Oakland, CA at 00:00Z on 2020-10-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -77 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
803 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
-77 m²/s²
0-3 km storm-relative helicity
-55 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

911 
WWUS76 KEKA 251144 CCA
NPWEKA

URGENT - WEATHER MESSAGE...CORRECTED
National Weather Service Eureka CA
444 AM PDT Sun Oct 25 2020

...Cool and windy conditions tonight and Monday....

A cool and very dry airmass will move into the area this afternoon
and persist into Monday. This will bring strong winds to the 
ridges. In the valleys winds will be much lighter, especially
overnight and this will allow temperatures to drop quickly 
tonight with most valleys seeing lows tonight in the mid 20s to 
low 30s. This is expected to be coldest night of the season in 
many areas. 

CAZ108-251845-
/O.UPG.KEKA.HZ.A.0001.201026T0700Z-201026T1600Z/
/O.NEW.KEKA.HZ.W.0003.201026T0700Z-201026T1600Z/
/O.CON.KEKA.FZ.W.0013.000000T0000Z-201025T1500Z/
/O.CON.KEKA.WI.Y.0004.201026T0000Z-201026T1800Z/
Southern Trinity-
444 AM PDT Sun Oct 25 2020

...FREEZE WARNING REMAINS IN EFFECT UNTIL 8 AM PDT THIS MORNING...
...WIND ADVISORY REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO
11 AM PDT MONDAY...
...HARD FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM
PDT MONDAY...

* WHAT...For the Hard Freeze Warning, sub-freezing temperatures 
  as low as 26 expected. For the Freeze Warning, sub-freezing 
  temperatures as low as 31 expected. For the Wind Advisory, 
  northeast winds 20 to 30 mph with gusts up to 50 mph expected.

* WHERE...Southern Trinity County.

* WHEN...For the Hard Freeze Warning, from midnight tonight to 9 
  AM PDT Monday. For the Freeze Warning, until 8 AM PDT this 
  morning. For the Wind Advisory, from 5 PM this afternoon to 11 
  AM PDT Monday.

* IMPACTS...Gusty winds could blow around unsecured objects. 
  Tree limbs could be blown down and a few power outages may 
  result. Frost and freeze conditions will kill crops, other 
  sensitive vegetation and possibly damage unprotected outdoor 
  plumbing.

* ADDITIONAL DETAILS...The coldest temperatures be in the valleys
  that have very light winds. The strong winds will be on the 
  exposed ridges and slopes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

Take steps now to protect tender plants from the cold. To prevent
freezing and possible bursting of outdoor water pipes they should
be wrapped, drained, or allowed to drip slowly. Those that have
in-ground sprinkler systems should drain them and cover above-
ground pipes to protect them from freezing.

&&

$$

CAZ111-114-251845-
/O.UPG.KEKA.HZ.A.0001.201026T0700Z-201026T1600Z/
/O.NEW.KEKA.HZ.W.0003.201026T0700Z-201026T1600Z/
/O.CON.KEKA.FR.Y.0029.000000T0000Z-201025T1500Z/
/O.CON.KEKA.WI.Y.0004.201026T0000Z-201026T1800Z/
Northeastern Mendocino Interior-Northern Lake County-
444 AM PDT Sun Oct 25 2020

...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM PDT THIS MORNING...
...WIND ADVISORY REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO
11 AM PDT MONDAY...
...HARD FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM
PDT MONDAY...

* WHAT...For the Hard Freeze Warning, sub-freezing temperatures as
  low as 26 expected. For the Frost Advisory, temperatures as low
  as 36 will result in frost formation. For the Wind Advisory,
  northeast winds 25 to 35 mph with gusts up to 60 mph expected
  over exposed ridges. 

* WHERE...Northeastern Mendocino Interior and Northern Lake 
  County Counties.

* WHEN...For the Hard Freeze Warning, from midnight tonight to 9 
  AM PDT Monday. For the Frost Advisory, until 8 AM PDT this 
  morning. For the Wind Advisory, from 5 PM this afternoon to 11 
  AM PDT Monday.

* IMPACTS...Gusty winds could blow around unsecured objects. 
  Tree limbs could be blown down and a few power outages may 
  result. Frost and freeze conditions will kill crops, other 
  sensitive vegetation and possibly damage unprotected outdoor 
  plumbing.

* ADDITIONAL DETAILS...The coldest temperatures be in the valleys
  that have very light winds. The strong winds will be on the 
  exposed ridges and slopes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

Take steps now to protect tender plants from the cold. To prevent
freezing and possible bursting of outdoor water pipes they should
be wrapped, drained, or allowed to drip slowly. Those that have
in-ground sprinkler systems should drain them and cover above-
ground pipes to protect them from freezing.

&&

$$

CAZ110-251845-
/O.UPG.KEKA.FZ.A.0006.201026T0700Z-201026T1600Z/
/O.NEW.KEKA.HZ.W.0003.201026T0700Z-201026T1600Z/
/O.CON.KEKA.FR.Y.0029.000000T0000Z-201025T1500Z/
/O.CON.KEKA.WI.Y.0004.201026T0000Z-201026T1800Z/
Northwestern Mendocino Interior-
444 AM PDT Sun Oct 25 2020

...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM PDT THIS MORNING...
...WIND ADVISORY REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO
11 AM PDT MONDAY...
...HARD FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM
PDT MONDAY...

* WHAT...For the Hard Freeze Warning, sub-freezing temperatures as
  low as 29 expected. For the Frost Advisory, temperatures as low
  as 36 will result in frost formation. For the Wind Advisory,
  northeast winds 10 to 20 mph with gusts up to 45 mph expected on
  the exposed slopes and ridges.

* WHERE...Northwestern Mendocino Interior County. The coldest
  temperatures will be in the valley including Willits.

* WHEN...For the Hard Freeze Warning, from midnight tonight to 9 
  AM PDT Monday. For the Frost Advisory, until 8 AM PDT this 
  morning. For the Wind Advisory, from 5 PM this afternoon to 11 
  AM PDT Monday.

* IMPACTS...Gusty winds could blow around unsecured objects. 
  Tree limbs could be blown down and a few power outages may 
  result. Frost and freeze conditions will kill crops, other 
  sensitive vegetation and possibly damage unprotected outdoor 
  plumbing.

* ADDITIONAL DETAILS...The coldest temperatures be in the valleys
  that have very light winds. The strong winds will be on the 
  exposed ridges and slopes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

Take steps now to protect tender plants from the cold. To prevent
freezing and possible bursting of outdoor water pipes they should
be wrapped, drained, or allowed to drip slowly. Those that have
in-ground sprinkler systems should drain them and cover above-
ground pipes to protect them from freezing.

&&

$$

CAZ107-251845-
/O.UPG.KEKA.HZ.A.0001.201026T0700Z-201026T1600Z/
/O.NEW.KEKA.HZ.W.0003.201026T0700Z-201026T1600Z/
/O.CON.KEKA.FZ.W.0013.000000T0000Z-201025T1500Z/
Northern Trinity-
444 AM PDT Sun Oct 25 2020

...FREEZE WARNING REMAINS IN EFFECT UNTIL 8 AM PDT THIS MORNING...
...HARD FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM
PDT MONDAY...

* WHAT...For the Hard Freeze Warning, sub-freezing temperatures as
  low as 23 expected. For the Freeze Warning, sub-freezing
  temperatures as low as 30 expected.

* WHERE...Northern Trinity County.

* WHEN...For the Hard Freeze Warning, from midnight tonight to 9 
  AM PDT Monday. For the Freeze Warning, until 8 AM PDT this 
  morning.

* IMPACTS...Frost and freeze conditions will kill crops, other 
  sensitive vegetation and possibly damage unprotected outdoor 
  plumbing.

* ADDITIONAL DETAILS...The coldest temperatures be in the valleys
  that have very light winds. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold. To prevent
freezing and possible bursting of outdoor water pipes they should
be wrapped, drained, or allowed to drip slowly. Those that have
in-ground sprinkler systems should drain them and cover above-
ground pipes to protect them from freezing.

&&

$$

CAZ106-115-251845-
/O.UPG.KEKA.FZ.A.0006.201026T0700Z-201026T1600Z/
/O.NEW.KEKA.FZ.W.0014.201026T0700Z-201026T1600Z/
/O.CON.KEKA.WI.Y.0004.201026T0000Z-201026T1800Z/
Southern Humboldt Interior-Southern Lake County-
444 AM PDT Sun Oct 25 2020

...WIND ADVISORY REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO
11 AM PDT MONDAY...
...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM PDT
MONDAY...

* WHAT...For the Freeze Warning, sub-freezing temperatures as low
  as 31 expected. For the Wind Advisory, northeast winds 25 to 35
  mph with gusts to 60 mph over exposed ridges.

* WHERE...Southern Humboldt Interior and Southern Lake County 
  Counties.

* WHEN...For the Freeze Warning, from midnight tonight to 9 AM 
  PDT Monday. For the Wind Advisory, from 5 PM this afternoon to 
  11 AM PDT Monday.

* IMPACTS...Gusty winds could blow around unsecured objects. 
  Tree limbs could be blown down and a few power outages may 
  result. Frost and freeze conditions will kill crops, other 
  sensitive vegetation and possibly damage unprotected outdoor 
  plumbing.

* ADDITIONAL DETAILS...The coldest temperatures be in the valleys
  that have very light winds. The strong winds will be on the 
  exposed ridges and slopes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

Take steps now to protect tender plants from the cold. To prevent
freezing and possible bursting of outdoor water pipes they should
be wrapped, drained, or allowed to drip slowly. Those that have
in-ground sprinkler systems should drain them and cover above-
ground pipes to protect them from freezing.

&&

$$

CAZ105-251845-
/O.UPG.KEKA.HZ.A.0001.201026T0700Z-201026T1600Z/
/O.NEW.KEKA.HZ.W.0003.201026T0700Z-201026T1600Z/
Northern Humboldt Interior-
444 AM PDT Sun Oct 25 2020

...HARD FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM
PDT MONDAY...

* WHAT...Sub-freezing temperatures as low as 29 expected.

* WHERE...Northern Humboldt Interior County.

* WHEN...From midnight tonight to 9 AM PDT Monday.

* IMPACTS...Frost and freeze conditions will kill crops, other 
  sensitive vegetation and possibly damage unprotected outdoor 
  plumbing.

* ADDITIONAL DETAILS...The coldest temperatures be in the valleys
  that have very light winds.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold. To prevent
freezing and possible bursting of outdoor water pipes they should
be wrapped, drained, or allowed to drip slowly. Those that have
in-ground sprinkler systems should drain them and cover above-
ground pipes to protect them from freezing.

&&

$$

CAZ102>104-109-251845-
/O.NEW.KEKA.FR.Y.0030.201026T0700Z-201026T1600Z/
Del Norte Interior-Northern Humboldt Coast-Southwestern Humboldt-
Mendocino Coast-
444 AM PDT Sun Oct 25 2020

...FROST ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM PDT
MONDAY...

* WHAT...Temperatures as low as 33 will result in frost 
  formation.

* WHERE...Del Norte Interior, Northern Humboldt Coast, 
  Southwestern Humboldt and Mendocino Coast Counties.

* WHEN...From midnight tonight to 9 AM PDT Monday.

* IMPACTS...Frost could kill sensitive outdoor vegetation if 
  left uncovered.

* ADDITIONAL DETAILS...The coldest temperatures be away from the
  immediate coast.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

CAZ113-251845-
/O.CON.KEKA.WI.Y.0004.201026T0000Z-201026T1800Z/
Southeastern Mendocino Interior-
444 AM PDT Sun Oct 25 2020

...WIND ADVISORY REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO
11 AM PDT MONDAY...

* WHAT...Northeast winds 15 to 25 mph with gusts up to 50 mph 
  expected on the exposed ridges and slopes.

* WHERE...Southeastern Mendocino Interior County.

* WHEN...From 5 PM this afternoon to 11 AM PDT Monday.

* IMPACTS...Gusty winds could blow around unsecured objects. 
  Tree limbs could be blown down and a few power outages may 
  result.

* Additional Details...Valley locations will see much lighter
  winds, especially overnight.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

&&

$$
4 follow-up statements
407 
WWUS76 KEKA 251834
NPWEKA

URGENT - WEATHER MESSAGE
National Weather Service Eureka CA
1134 AM PDT Sun Oct 25 2020

...Very dry air spreading into the area tonight and Monday... 
...Very windy over the ridges tonight through Monday morning...

A very dry airmass will spread over the area tonight and Monday. 
This dry air along with clear skies will allow temperatures to 
plummet in the valleys with light or no wind overnight. The dry 
airmass will persist over the area Monday night, resulting in 
another cold morning on Tuesday with frost and freezing 
temperatures expected for the valleys again. In addition to the 
cold early morning temperatures, robust east and northeast winds 
are expected over the ridges. Winds are expected to gust up to 60
mph over the ridgetops tonight into early Monday morning.

CAZ113-260500-
/O.EXB.KEKA.FZ.W.0014.201026T0900Z-201026T1600Z/
/O.CON.KEKA.WI.Y.0004.201026T0000Z-201026T1800Z/
Southeastern Mendocino Interior-
1134 AM PDT Sun Oct 25 2020

...WIND ADVISORY REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO
11 AM PDT MONDAY ABOVE 1500 FEET...
...FREEZE WARNING IN EFFECT FROM 2 AM TO 9 AM PDT MONDAY...

* WHAT...For the Freeze Warning, temperatures as low as 32
  expected. For the Wind Advisory above 1500 feet, northeast winds
  15 to 30 mph with gusts up to 50 mph expected over the ridges. 
  Northeast winds 10 to 20 mph in the valleys. 

* WHERE...Southeastern Mendocino Interior County.

* WHEN...For the Freeze Warning, from 2 AM to 9 AM PDT Monday. 
  For the Wind Advisory, from 5 PM this afternoon to 11 AM PDT 
  Monday.

* IMPACTS...Gusty winds could blow around unsecured objects. 
  Tree limbs could be blown down and a few power outages may 
  result. Frost and freeze conditions will kill crops, other 
  sensitive vegetation and possibly damage unprotected outdoor 
  plumbing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

Take steps now to protect tender plants from the cold. To prevent
freezing and possible bursting of outdoor water pipes they should
be wrapped, drained, or allowed to drip slowly. Those that have
in-ground sprinkler systems should drain them and cover above-
ground pipes to protect them from freezing.

&&

$$

CAZ112-260500-
/O.EXB.KEKA.FZ.W.0014.201026T0900Z-201026T1600Z/
Southwestern Mendocino Interior-
1134 AM PDT Sun Oct 25 2020

...FREEZE WARNING IN EFFECT FROM 2 AM TO 9 AM PDT MONDAY...

* WHAT...Temperatures as low as 32 expected.

* WHERE...Southwestern Mendocino Interior County.

* WHEN...From 2 AM to 9 AM PDT Monday.

* IMPACTS...Frost and freeze conditions will kill crops, other 
  sensitive vegetation and possibly damage unprotected outdoor 
  plumbing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold. To prevent
freezing and possible bursting of outdoor water pipes they should
be wrapped, drained, or allowed to drip slowly. Those that have
in-ground sprinkler systems should drain them and cover above-
ground pipes to protect them from freezing.

&&

$$

CAZ114-260500-
/O.EXT.KEKA.HZ.W.0003.201026T0900Z-201026T1600Z/
/O.CON.KEKA.WI.Y.0004.201026T0000Z-201026T1800Z/
Northern Lake County-
1134 AM PDT Sun Oct 25 2020

...WIND ADVISORY REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO
11 AM PDT MONDAY ABOVE 1500 FEET...
...HARD FREEZE WARNING NOW IN EFFECT FROM 2 AM TO 9 AM PDT
MONDAY...

* WHAT...For the Hard Freeze Warning, sub-freezing temperatures as
  low as 28 expected. For the Wind Advisory above 1500 feet,
  northeast winds 25 to 35 mph with gusts up to 60 mph expected
  over the ridges. Northeast winds 15 to 30 mph in the valleys. 

* WHERE...Northern Lake County County.

* WHEN...For the Hard Freeze Warning, from 2 AM to 9 AM PDT 
  Monday. For the Wind Advisory, from 5 PM this afternoon to 11 
  AM PDT Monday.

* IMPACTS...Gusty winds could blow around unsecured objects. 
  Tree limbs could be blown down and a few power outages may 
  result. Frost and freeze conditions will kill crops, other 
  sensitive vegetation and possibly damage unprotected outdoor 
  plumbing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

Take steps now to protect tender plants from the cold. To prevent
freezing and possible bursting of outdoor water pipes they should
be wrapped, drained, or allowed to drip slowly. Those that have
in-ground sprinkler systems should drain them and cover above-
ground pipes to protect them from freezing.

&&

$$

CAZ108-110-111-260500-
/O.EXT.KEKA.HZ.W.0003.201026T0900Z-201026T1600Z/
/O.CON.KEKA.WI.Y.0004.201026T0000Z-201026T1800Z/
Southern Trinity-Northwestern Mendocino Interior-
Northeastern Mendocino Interior-
1134 AM PDT Sun Oct 25 2020

...WIND ADVISORY REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO
11 AM PDT MONDAY ABOVE 2500 FEET...
...HARD FREEZE WARNING NOW IN EFFECT FROM 2 AM TO 9 AM PDT
MONDAY...

* WHAT...For the Hard Freeze Warning, sub-freezing temperatures as
  low as 28 expected. For the Wind Advisory above 2500 feet,
  northeast winds 25 to 35 mph with gusts up to 60 mph expected
  over the ridges. Northeast winds 15 to 30 mph in the valleys.

* WHERE...Southern Trinity, Northeastern Mendocino Interior and 
  Northwestern Mendocino Interior Counties.

* WHEN...For the Hard Freeze Warning, from 2 AM to 9 AM PDT 
  Monday. For the Wind Advisory, from 5 PM this afternoon to 11 
  AM PDT Monday.

* IMPACTS...Gusty winds could blow around unsecured objects. 
  Tree limbs could be blown down and a few power outages may 
  result. Frost and freeze conditions will kill crops, other 
  sensitive vegetation and possibly damage unprotected outdoor 
  plumbing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

Take steps now to protect tender plants from the cold. To prevent
freezing and possible bursting of outdoor water pipes they should
be wrapped, drained, or allowed to drip slowly. Those that have
in-ground sprinkler systems should drain them and cover above-
ground pipes to protect them from freezing.

&&

$$

CAZ115-260500-
/O.EXT.KEKA.FZ.W.0014.201026T0900Z-201026T1600Z/
/O.CON.KEKA.WI.Y.0004.201026T0000Z-201026T1800Z/
Southern Lake County-
1134 AM PDT Sun Oct 25 2020

...WIND ADVISORY REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO
11 AM PDT MONDAY ABOVE 1500 FEET...
...FREEZE WARNING NOW IN EFFECT FROM 2 AM TO 9 AM PDT MONDAY...

* WHAT...For the Freeze Warning, temperatures as low as 32
  expected. For the Wind Advisory above 1500 feet, northeast winds
  25 to 35 mph with gusts up to 60 mph expected over the ridges.
  Northeast winds 15 to 30 mph expected in the valleys. 

* WHERE...Southern Lake County County.

* WHEN...For the Freeze Warning, from 2 AM to 9 AM PDT Monday. 
  For the Wind Advisory, from 5 PM this afternoon to 11 AM PDT 
  Monday.

* IMPACTS...Gusty winds could blow around unsecured objects. 
  Tree limbs could be blown down and a few power outages may 
  result. Frost and freeze conditions will kill crops, other 
  sensitive vegetation and possibly damage unprotected outdoor 
  plumbing.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

Take steps now to protect tender plants from the cold. To prevent
freezing and possible bursting of outdoor water pipes they should
be wrapped, drained, or allowed to drip slowly. Those that have
in-ground sprinkler systems should drain them and cover above-
ground pipes to protect them from freezing.

&&

$$

CAZ106-260500-
/O.EXT.KEKA.FZ.W.0014.201026T0900Z-201026T1600Z/
/O.CON.KEKA.WI.Y.0004.201026T0000Z-201026T1800Z/
Southern Humboldt Interior-
1134 AM PDT Sun Oct 25 2020

...WIND ADVISORY REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO
11 AM PDT MONDAY ABOVE 2500 FEET...
...FREEZE WARNING NOW IN EFFECT FROM 2 AM TO 9 AM PDT MONDAY...

* WHAT...For the Freeze Warning, temperatures as low as 32
  expected. For the Wind Advisory above 2500 feet, east winds 25
  to 35 mph with gusts up to 60 mph expected over the ridges. East
  winds 15 to 30 mph expected in the valleys. 

* WHERE...Southern Humboldt Interior County.

* WHEN...For the Freeze Warning, from 2 AM to 9 AM PDT Monday. 
  For the Wind Advisory, from 5 PM this afternoon to 11 AM PDT 
  Monday.

* IMPACTS...Gusty winds could blow around unsecured objects. 
  Tree limbs could be blown down and a few power outages may 
  result. Frost and freeze conditions will kill crops, other 
  sensitive vegetation and possibly damage unprotected outdoor 
  plumbing.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

Take steps now to protect tender plants from the cold. To prevent
freezing and possible bursting of outdoor water pipes they should
be wrapped, drained, or allowed to drip slowly. Those that have
in-ground sprinkler systems should drain them and cover above-
ground pipes to protect them from freezing.

&&

$$

CAZ105-107-260500-
/O.EXT.KEKA.HZ.W.0003.201026T0900Z-201026T1600Z/
Northern Humboldt Interior-Northern Trinity-
1134 AM PDT Sun Oct 25 2020

...HARD FREEZE WARNING NOW IN EFFECT FROM 2 AM TO 9 AM PDT
MONDAY...

* WHAT...Sub-freezing temperatures as low as 25 expected.

* WHERE...Northern Humboldt Interior and Northern Trinity 
  Counties.

* WHEN...From 2 AM to 9 AM PDT Monday.

* IMPACTS...Frost and freeze conditions will kill crops, other 
  sensitive vegetation and possibly damage unprotected outdoor 
  plumbing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold. To prevent
freezing and possible bursting of outdoor water pipes they should
be wrapped, drained, or allowed to drip slowly. Those that have
in-ground sprinkler systems should drain them and cover above-
ground pipes to protect them from freezing.

&&

$$

CAZ102>104-109-260500-
/O.EXT.KEKA.FR.Y.0030.201026T0900Z-201026T1600Z/
Del Norte Interior-Northern Humboldt Coast-Southwestern Humboldt-
Mendocino Coast-
1134 AM PDT Sun Oct 25 2020

...FROST ADVISORY NOW IN EFFECT FROM 2 AM TO 9 AM PDT MONDAY...

* WHAT...Temperatures as low as 33 will result in frost  
  formation.

* WHERE...Mendocino Coast, Del Norte Interior, Northern Humboldt 
  Coast and Southwestern Humboldt Counties.

* WHEN...From 2 AM to 9 AM PDT Monday.

* IMPACTS...Frost could kill sensitive outdoor vegetation if 
  left uncovered.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$
067 
WWUS76 KEKA 260457
NPWEKA

URGENT - WEATHER MESSAGE
National Weather Service Eureka CA
957 PM PDT Sun Oct 25 2020

...Very dry air spreading into the area tonight and Monday... ...
Very windy over the ridges tonight through Monday morning...

A very dry airmass will continue to push in through Monday. This 
dry air along with clear skies will allow temperatures to plummet 
in the valleys, where winds will be light overnight. The dry 
airmass will persist over the area Monday night, resulting in 
another cold morning on Tuesday with frost and freezing 
temperatures possible for the coldest valleys once again. 

In addition to the cold early morning temperatures, locally potent 
east and northeast winds are expected over the ridges. Wind gusts
of 50 to 60 mph will be possible late tonight into Monday morning
for exposed mountain slope and ridgetop locations. 


CAZ114-261600-
/O.CON.KEKA.HZ.W.0003.201026T0900Z-201026T1600Z/
/O.CON.KEKA.WI.Y.0004.000000T0000Z-201026T1800Z/
Northern Lake County-
957 PM PDT Sun Oct 25 2020

...WIND ADVISORY REMAINS IN EFFECT UNTIL 11 AM PDT MONDAY ABOVE
1500 FEET...
...HARD FREEZE WARNING REMAINS IN EFFECT FROM 2 AM TO 9 AM PDT
MONDAY...

* WHAT...For the Hard Freeze Warning, sub-freezing temperatures as
  low as 28 expected. For the Wind Advisory above 1500 feet,
  northeast winds 25 to 35 mph with gusts up to 60 mph expected
  over the ridges. Northeast winds 15 to 30 mph in some less-
  sheltered valleys.

* WHERE...Northern Lake County County.

* WHEN...For the Hard Freeze Warning, from 2 AM to 9 AM PDT 
  Monday. For the Wind Advisory, from 5 PM this afternoon to 11 
  AM PDT Monday.

* IMPACTS...Gusty winds could blow around unsecured objects. 
  Tree limbs could be blown down and a few power outages may 
  result. Frost and freeze conditions will kill crops, other 
  sensitive vegetation and possibly damage unprotected outdoor 
  plumbing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

Take steps now to protect tender plants from the cold. To prevent
freezing and possible bursting of outdoor water pipes they should
be wrapped, drained, or allowed to drip slowly. Those that have
in-ground sprinkler systems should drain them and cover above-
ground pipes to protect them from freezing.

&&

$$

CAZ108-110-111-261600-
/O.CON.KEKA.HZ.W.0003.201026T0900Z-201026T1600Z/
/O.CON.KEKA.WI.Y.0004.000000T0000Z-201026T1800Z/
Southern Trinity-Northwestern Mendocino Interior-
Northeastern Mendocino Interior-
957 PM PDT Sun Oct 25 2020

...WIND ADVISORY REMAINS IN EFFECT UNTIL 11 AM PDT MONDAY ABOVE
2500 FEET...
...HARD FREEZE WARNING REMAINS IN EFFECT FROM 2 AM TO 9 AM PDT
MONDAY...

* WHAT...For the Hard Freeze Warning, sub-freezing temperatures as
  low as 28 expected. For the Wind Advisory above 2500 feet,
  northeast winds 25 to 35 mph with gusts up to 60 mph expected
  over the ridges. 

* WHERE...Southern Trinity, Northeastern Mendocino Interior and 
  Northwestern Mendocino Interior Counties.

* WHEN...For the Hard Freeze Warning, from 2 AM to 9 AM PDT 
  Monday. For the Wind Advisory, from 5 PM this afternoon to 11 
  AM PDT Monday.

* IMPACTS...Gusty winds could blow around unsecured objects. 
  Tree limbs could be blown down and a few power outages may 
  result. Frost and freeze conditions will kill crops, other 
  sensitive vegetation and possibly damage unprotected outdoor 
  plumbing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

Take steps now to protect tender plants from the cold. To prevent
freezing and possible bursting of outdoor water pipes they should
be wrapped, drained, or allowed to drip slowly. Those that have
in-ground sprinkler systems should drain them and cover above-
ground pipes to protect them from freezing.

&&

$$

CAZ113-115-261600-
/O.CON.KEKA.FZ.W.0014.201026T0900Z-201026T1600Z/
/O.CON.KEKA.WI.Y.0004.000000T0000Z-201026T1800Z/
Southeastern Mendocino Interior-Southern Lake County-
957 PM PDT Sun Oct 25 2020

...WIND ADVISORY REMAINS IN EFFECT UNTIL 11 AM PDT MONDAY ABOVE
1500 FEET...
...FREEZE WARNING REMAINS IN EFFECT FROM 2 AM TO 9 AM PDT
MONDAY...

* WHAT...For the Freeze Warning, temperatures as low as 32
  expected. For the Wind Advisory above 1500 feet, northeast winds
  25 to 35 mph with gusts up to 60 mph expected over the ridges.
  Local winds 15 to 30 mph possible in some less-sheltered
  valleys. 

* WHERE...Southeastern Mendocino Interior County.

* WHEN...For the Freeze Warning, from 2 AM to 9 AM PDT Monday. 
  For the Wind Advisory, from 5 PM this afternoon to 11 AM PDT 
  Monday.

* IMPACTS...Gusty winds could blow around unsecured objects. 
  Tree limbs could be blown down and a few power outages may 
  result. Frost and freeze conditions will kill crops, other 
  sensitive vegetation and possibly damage unprotected outdoor 
  plumbing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

Take steps now to protect tender plants from the cold. To prevent
freezing and possible bursting of outdoor water pipes they should
be wrapped, drained, or allowed to drip slowly. Those that have
in-ground sprinkler systems should drain them and cover above-
ground pipes to protect them from freezing.

&&

$$

CAZ106-261600-
/O.CON.KEKA.FZ.W.0014.201026T0900Z-201026T1600Z/
/O.CON.KEKA.WI.Y.0004.000000T0000Z-201026T1800Z/
Southern Humboldt Interior-
957 PM PDT Sun Oct 25 2020

...WIND ADVISORY REMAINS IN EFFECT UNTIL 11 AM PDT MONDAY ABOVE
2500 FEET...
...FREEZE WARNING REMAINS IN EFFECT FROM 2 AM TO 9 AM PDT
MONDAY...

* WHAT...For the Freeze Warning, temperatures as low as 32 
  expected. For the Wind Advisory above 2500 feet, east winds 25 
  to 35 mph with gusts up to 60 mph expected over the ridges. 

* WHERE...Southern Humboldt Interior County.

* WHEN...For the Freeze Warning, from 2 AM to 9 AM PDT Monday. 
  For the Wind Advisory, from 5 PM this afternoon to 11 AM PDT 
  Monday.

* IMPACTS...Gusty winds could blow around unsecured objects. 
  Tree limbs could be blown down and a few power outages may 
  result. Frost and freeze conditions will kill crops, other 
  sensitive vegetation and possibly damage unprotected outdoor 
  plumbing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

Take steps now to protect tender plants from the cold. To prevent
freezing and possible bursting of outdoor water pipes they should
be wrapped, drained, or allowed to drip slowly. Those that have
in-ground sprinkler systems should drain them and cover above-
ground pipes to protect them from freezing.

&&

$$

CAZ105-107-261600-
/O.CON.KEKA.HZ.W.0003.201026T0900Z-201026T1600Z/
Northern Humboldt Interior-Northern Trinity-
957 PM PDT Sun Oct 25 2020

...HARD FREEZE WARNING REMAINS IN EFFECT FROM 2 AM TO 9 AM PDT
MONDAY...

* WHAT...Sub-freezing temperatures as low as 25 expected.

* WHERE...Northern Humboldt Interior and Northern Trinity 
  Counties.

* WHEN...From 2 AM to 9 AM PDT Monday.

* IMPACTS...Frost and freeze conditions will kill crops, other 
  sensitive vegetation and possibly damage unprotected outdoor 
  plumbing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold. To prevent
freezing and possible bursting of outdoor water pipes they should
be wrapped, drained, or allowed to drip slowly. Those that have
in-ground sprinkler systems should drain them and cover above-
ground pipes to protect them from freezing.

&&

$$

CAZ112-261600-
/O.CON.KEKA.FZ.W.0014.201026T0900Z-201026T1600Z/
Southwestern Mendocino Interior-
957 PM PDT Sun Oct 25 2020

...FREEZE WARNING REMAINS IN EFFECT FROM 2 AM TO 9 AM PDT
MONDAY...

* WHAT...Temperatures as low as 32 expected.

* WHERE...Southwestern Mendocino Interior County.

* WHEN...From 2 AM to 9 AM PDT Monday.

* IMPACTS...Frost and freeze conditions will kill crops, other 
  sensitive vegetation and possibly damage unprotected outdoor 
  plumbing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold. To prevent
freezing and possible bursting of outdoor water pipes they should
be wrapped, drained, or allowed to drip slowly. Those that have
in-ground sprinkler systems should drain them and cover above-
ground pipes to protect them from freezing.

&&

$$

CAZ102>104-109-261600-
/O.CON.KEKA.FR.Y.0030.201026T0900Z-201026T1600Z/
Del Norte Interior-Northern Humboldt Coast-Southwestern Humboldt-
Mendocino Coast-
957 PM PDT Sun Oct 25 2020

...FROST ADVISORY REMAINS IN EFFECT FROM 2 AM TO 9 AM PDT
MONDAY...

* WHAT...Temperatures as low as 33 will result in frost 
  formation.

* WHERE...Some colder valley locations around the Del Norte
  Interior, Mendocino Coast, Northern Humboldt Coast and 
  Southwestern Humboldt Counties. Locations include Blue Lake, 
  McKinleyville, and Eureka. 

* WHEN...From 2 AM to 9 AM PDT Monday.

* IMPACTS...Frost could kill sensitive outdoor vegetation if 
  left uncovered.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$
491 
WWUS76 KEKA 261055
NPWEKA

URGENT - WEATHER MESSAGE
National Weather Service Eureka CA
355 AM PDT Mon Oct 26 2020

...Very dry air spreading into the area tonight and Monday... ...
Very windy over the ridges tonight through Monday morning...

A very dry airmass will continue to push into the area this
morning. This dry air along with clear skies has allowed 
temperatures to plummet in the valleys with light winds. The dry 
airmass will persist over the area Monday night, resulting in 
another cold morning on Tuesday with frost and freezing 
temperatures possible for the valleys once again.

In addition to the cold early morning temperatures, locally
potent east and northeast winds are expected over the ridges.
Wind gusts of 50 to 60 mph will continue morning for exposed 
mountain slope and ridgetop locations.

CAZ114-261800-
/O.CON.KEKA.HZ.W.0003.000000T0000Z-201026T1600Z/
/O.CON.KEKA.WI.Y.0004.000000T0000Z-201026T1800Z/
Northern Lake County-
355 AM PDT Mon Oct 26 2020

...HARD FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM PDT THIS
MORNING...
...WIND ADVISORY REMAINS IN EFFECT UNTIL 11 AM PDT THIS MORNING
ABOVE 1500 FEET...

* WHAT...For the Hard Freeze Warning, sub-freezing temperatures 
  as low as 28 expected. For the Wind Advisory above 1500 feet, 
  northeast winds 25 to 35 mph with gusts up to 60 mph expected 
  over the ridges. Northeast winds 15 to 30 mph in some less- 
  sheltered valleys.

* WHERE...Northern Lake County County.

* WHEN...For the Hard Freeze Warning, from 2 AM to 9 AM PDT 
  Monday. For the Wind Advisory, from 5 PM this afternoon to 11 
  AM PDT Monday.

* IMPACTS...Gusty winds could blow around unsecured objects. 
  Tree limbs could be blown down and a few power outages may 
  result. Frost and freeze conditions will kill crops, other 
  sensitive vegetation and possibly damage unprotected outdoor 
  plumbing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

Take steps now to protect tender plants from the cold. To prevent
freezing and possible bursting of outdoor water pipes they should
be wrapped, drained, or allowed to drip slowly. Those that have
in-ground sprinkler systems should drain them and cover above-
ground pipes to protect them from freezing.

&&

$$

CAZ108-110-111-261800-
/O.CON.KEKA.HZ.W.0003.000000T0000Z-201026T1600Z/
/O.CON.KEKA.WI.Y.0004.000000T0000Z-201026T1800Z/
Southern Trinity-Northwestern Mendocino Interior-
Northeastern Mendocino Interior-
355 AM PDT Mon Oct 26 2020

...HARD FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM PDT THIS
MORNING...
...WIND ADVISORY REMAINS IN EFFECT UNTIL 11 AM PDT THIS MORNING
ABOVE 2500 FEET...

* WHAT...For the Hard Freeze Warning, sub-freezing temperatures as
  low as 26 expected. For the Wind Advisory above 2500 feet,
  northeast winds 25 to 35 mph with gusts up to 50 mph expected 
  over the ridges.

* WHERE...Southern Trinity, Northeastern Mendocino Interior and 
  Northwestern Mendocino Interior Counties.

* WHEN...For the Hard Freeze Warning, from 2 AM to 9 AM PDT 
  Monday. For the Wind Advisory, from 5 PM this afternoon to 11 
  AM PDT Monday.

* IMPACTS...Gusty winds could blow around unsecured objects. 
  Tree limbs could be blown down and a few power outages may 
  result. Frost and freeze conditions will kill crops, other 
  sensitive vegetation and possibly damage unprotected outdoor 
  plumbing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

Take steps now to protect tender plants from the cold. To prevent
freezing and possible bursting of outdoor water pipes they should
be wrapped, drained, or allowed to drip slowly. Those that have
in-ground sprinkler systems should drain them and cover above-
ground pipes to protect them from freezing.

&&

$$

CAZ113-115-261800-
/O.CON.KEKA.FZ.W.0014.000000T0000Z-201026T1600Z/
/O.CON.KEKA.WI.Y.0004.000000T0000Z-201026T1800Z/
Southeastern Mendocino Interior-Southern Lake County-
355 AM PDT Mon Oct 26 2020

...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM PDT THIS MORNING...
...WIND ADVISORY REMAINS IN EFFECT UNTIL 11 AM PDT THIS MORNING
ABOVE 1500 FEET...

* WHAT...For the Freeze Warning, temperatures as low as 32
  expected. For the Wind Advisory above 1500 feet, northeast winds
  25 to 35 mph with gusts up to 65 mph expected over the ridges.
  Local winds 15 to 30 mph possible in some less-sheltered 
  valleys of Lake county.

* WHERE...Southeastern Mendocino Interior County.

* WHEN...For the Freeze Warning, from 2 AM to 9 AM PDT Monday. 
  For the Wind Advisory, from 5 PM this afternoon to 11 AM PDT 
  Monday.

* IMPACTS...Gusty winds could blow around unsecured objects. 
  Tree limbs could be blown down and a few power outages may 
  result. Frost and freeze conditions will kill crops, other 
  sensitive vegetation and possibly damage unprotected outdoor 
  plumbing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

Take steps now to protect tender plants from the cold. To prevent
freezing and possible bursting of outdoor water pipes they should
be wrapped, drained, or allowed to drip slowly. Those that have
in-ground sprinkler systems should drain them and cover above-
ground pipes to protect them from freezing.

&&

$$

CAZ106-261800-
/O.CON.KEKA.FZ.W.0014.000000T0000Z-201026T1600Z/
/O.CON.KEKA.WI.Y.0004.000000T0000Z-201026T1800Z/
Southern Humboldt Interior-
355 AM PDT Mon Oct 26 2020

...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM PDT THIS MORNING...
...WIND ADVISORY REMAINS IN EFFECT UNTIL 11 AM PDT THIS MORNING
ABOVE 2500 FEET...

* WHAT...For the Freeze Warning, temperatures as low as 32 
  expected. For the Wind Advisory above 2500 feet, east winds 25 
  to 35 mph with gusts up to 50 mph expected over the ridges.

* WHERE...Southern Humboldt Interior County.

* WHEN...For the Freeze Warning, from 2 AM to 9 AM PDT Monday. 
  For the Wind Advisory, from 5 PM this afternoon to 11 AM PDT 
  Monday.

* IMPACTS...Gusty winds could blow around unsecured objects. 
  Tree limbs could be blown down and a few power outages may 
  result. Frost and freeze conditions will kill crops, other 
  sensitive vegetation and possibly damage unprotected outdoor 
  plumbing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

Take steps now to protect tender plants from the cold. To prevent
freezing and possible bursting of outdoor water pipes they should
be wrapped, drained, or allowed to drip slowly. Those that have
in-ground sprinkler systems should drain them and cover above-
ground pipes to protect them from freezing.

&&

$$

CAZ105-107-261600-
/O.CON.KEKA.HZ.W.0003.000000T0000Z-201026T1600Z/
Northern Humboldt Interior-Northern Trinity-
355 AM PDT Mon Oct 26 2020

...HARD FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM PDT THIS
MORNING...

* WHAT...Sub-freezing temperatures as low as 25 expected.

* WHERE...Northern Humboldt Interior and Northern Trinity 
  Counties.

* WHEN...From 2 AM to 9 AM PDT Monday.

* IMPACTS...Frost and freeze conditions will kill crops, other 
  sensitive vegetation and possibly damage unprotected outdoor 
  plumbing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold. To prevent
freezing and possible bursting of outdoor water pipes they should
be wrapped, drained, or allowed to drip slowly. Those that have
in-ground sprinkler systems should drain them and cover above-
ground pipes to protect them from freezing.

&&

$$

CAZ112-261600-
/O.CON.KEKA.FZ.W.0014.000000T0000Z-201026T1600Z/
Southwestern Mendocino Interior-
355 AM PDT Mon Oct 26 2020

...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM PDT THIS MORNING...

* WHAT...Temperatures as low as 32 expected.

* WHERE...Southwestern Mendocino Interior County.

* WHEN...From 2 AM to 9 AM PDT Monday.

* IMPACTS...Frost and freeze conditions will kill crops, other
  sensitive vegetation and possibly damage unprotected outdoor
  plumbing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold. To prevent
freezing and possible bursting of outdoor water pipes they should
be wrapped, drained, or allowed to drip slowly. Those that have
in-ground sprinkler systems should drain them and cover above-
ground pipes to protect them from freezing.

&&

$$

CAZ102>104-109-261600-
/O.CON.KEKA.FR.Y.0030.000000T0000Z-201026T1600Z/
Del Norte Interior-Northern Humboldt Coast-Southwestern Humboldt-
Mendocino Coast-
355 AM PDT Mon Oct 26 2020

...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM PDT THIS MORNING...

* WHAT...Temperatures as low as 33 will result in frost 
  formation.

* WHERE...Some colder valley locations around the Del Norte 
  Interior, Mendocino Coast, Northern Humboldt Coast and 
  Southwestern Humboldt Counties. Locations include Blue Lake, 
  McKinleyville, and Eureka.

* WHEN...From 2 AM to 9 AM PDT Monday.

* IMPACTS...Frost could kill sensitive outdoor vegetation if 
  left uncovered.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$
601 
WWUS76 KEKA 261619
NPWEKA

URGENT - WEATHER MESSAGE
National Weather Service Eureka CA
919 AM PDT Mon Oct 26 2020

A very dry airmass has settled into the area this morning. The 
dry airmass will persist over the area tonight, resulting in 
another cold morning on Tuesday with freezing temperatures 
possible for the valleys once again along with the potential for
frost.

Northeast to east winds will continue to diminish over the 
ridges this morning. Wind gusts of 40 mph will remain possible 
for exposed mountain slope and ridgetop locations through late
morning.

CAZ114-261800-
/O.EXP.KEKA.HZ.W.0003.000000T0000Z-201026T1600Z/
/O.CON.KEKA.WI.Y.0004.000000T0000Z-201026T1800Z/
Northern Lake County-
919 AM PDT Mon Oct 26 2020

...WIND ADVISORY REMAINS IN EFFECT UNTIL 11 AM THIS MORNING ABOVE 
1500 FEET...
...HARD FREEZE WARNING HAS EXPIRED...

* WHAT...Northeast winds 10 to 20 mph with gusts to 40 mph above 
  1500 feet.

* WHERE...Northern Lake County County.

* WHEN...Through 11 AM this morning.

* IMPACTS...Gusty winds could blow around unsecured objects. Tree
  limbs could be blown down and a few power outages may result.

* ADDITION INFO...Cold temperatures are expected again tonight, with
  freezing temperatures or frost possible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

$$

CAZ108-110-111-261800-
/O.EXP.KEKA.HZ.W.0003.000000T0000Z-201026T1600Z/
/O.CON.KEKA.WI.Y.0004.000000T0000Z-201026T1800Z/
Southern Trinity-Northwestern Mendocino Interior-
Northeastern Mendocino Interior-
919 AM PDT Mon Oct 26 2020

...WIND ADVISORY REMAINS IN EFFECT UNTIL 11 AM THIS MORNING ABOVE 
2500 FEET...
...HARD FREEZE WARNING HAS EXPIRED...

* WHAT...Northeast winds 10 to 20 mph with gusts to 40 mph above 
  2500 feet.

* WHERE...Southern Trinity, Northeastern Mendocino Interior and 
  Northwestern Mendocino Interior Counties.

* WHEN...Through 11 AM this morning.

* IMPACTS...Gusty winds could blow around unsecured objects. 
  Tree limbs could be blown down and a few power outages may 
  result.

* ADDITION INFO...Cold temperatures are expected again tonight, with
  freezing temperatures or frost possible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

$$

CAZ113-115-261800-
/O.EXP.KEKA.FZ.W.0014.000000T0000Z-201026T1600Z/
/O.CON.KEKA.WI.Y.0004.000000T0000Z-201026T1800Z/
Southeastern Mendocino Interior-Southern Lake County-
919 AM PDT Mon Oct 26 2020

...WIND ADVISORY REMAINS IN EFFECT UNTIL 11 AM THIS MORNING ABOVE 
1500 FEET...
...FREEZE WARNING HAS EXPIRED...

* WHAT...Northeast winds 10 to 20 mph with gusts to 40 mph above 
  1500 feet.

* WHERE...Southeastern Mendocino Interior County.

* WHEN...Through 11 AM this morning.

* IMPACTS...Gusty winds could blow around unsecured objects. Tree
  limbs could be blown down and a few power outages may result.

* ADDITION INFO...Cold temperatures are expected again tonight, with
  freezing temperatures or frost possible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

$$

CAZ106-261800-
/O.EXP.KEKA.FZ.W.0014.000000T0000Z-201026T1600Z/
/O.CON.KEKA.WI.Y.0004.000000T0000Z-201026T1800Z/
Southern Humboldt Interior-
919 AM PDT Mon Oct 26 2020

...WIND ADVISORY REMAINS IN EFFECT UNTIL 11 AM THIS MORNING ABOVE 
2500 FEET...
...FREEZE WARNING HAS EXPIRED...

* WHAT...East winds 10 to 20 mph with gusts to 40 mph above 2500 
  feet.

* WHERE...Southern Humboldt Interior County.

* WHEN...Through 11 AM this morning.

* IMPACTS...Gusty winds could blow around unsecured objects. Tree
  limbs could be blown down and a few power outages may result.

* ADDITION INFO...Cold temperatures are expected again tonight, with
  freezing temperatures or frost possible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

$$

CAZ105-107-261730-
/O.EXP.KEKA.HZ.W.0003.000000T0000Z-201026T1600Z/
Northern Humboldt Interior-Northern Trinity-
919 AM PDT Mon Oct 26 2020

...HARD FREEZE WARNING HAS EXPIRED...

Cold temperatures are expected again tonight, with freezing
temperatures or frost possible.

$$

CAZ112-261730-
/O.EXP.KEKA.FZ.W.0014.000000T0000Z-201026T1600Z/
Southwestern Mendocino Interior-
919 AM PDT Mon Oct 26 2020

...FREEZE WARNING HAS EXPIRED...

Cold temperatures are expected again tonight, with freezing
temperatures or frost possible.

$$

CAZ102>104-109-261730-
/O.EXP.KEKA.FR.Y.0030.000000T0000Z-201026T1600Z/
Del Norte Interior-Northern Humboldt Coast-Southwestern Humboldt-
Mendocino Coast-
919 AM PDT Mon Oct 26 2020

...FROST ADVISORY HAS EXPIRED...

Cold temperatures are expected again tonight, with freezing
temperatures or frost possible.

$$

What forecasters said that day

The local office's own words before this hard freeze warning 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 hard freeze warning went out at Oct 25, 4:43 AM PDT, 1 minute earlier.

Area forecast discussion, Oct 25, 4:43 AM PDT, 1 minute before
AREA FORECAST DISCUSSION
National Weather Service Eureka CA
443 AM PDT Sun Oct 25 2020

.SYNOPSIS...A very dry air mass and strong northeast winds over
the ridges will spread over the area this afternoon and evening.
Extremely dry conditions and robust offshore winds are expected to
persist for Monday and Tuesday. Widespread frost and freezing
temperatures will be possible in the valleys and in coastal areas
early Monday morning.

&&

.DISCUSSION...Humidities drop and northeast winds strengthen today
as a  shortwave trough drops into the Great Basin. Surface high
pressure will start to build in the wake of this shortwave by the
afternoon, with a very dry airmass spreading across NW California
during the overnight hours tonight. Northeast winds will also start
to increase over the upper elevations and ridges through the day
today, with possible gusts to 50 mph by late this afternoon. A red
flag warning for critical fire weather conditions remain in effect
from late morning through Monday afternoon, and this has been
extended through early Tuesday morning for interior Mendocino, Lake,
southeastern Humboldt, and southwestern Trinity counties. The peak
in the NE winds will likely occur late this evening and overnight
when instantaneous speeds should reach 60 mph over the ridges. Gusty
winds are expected to somewhat weaken during the day on Monday
before increasing again across ridges in the southern half of the
CWA Monday night, however these are not expected to be nearly as
strong as those tonight.

Even though winds will be quite robust over the ridges, many of the
valleys and wind-sheltered areas will likely not see advisory level
winds. Winds may even go calm in the valleys overnight tonight.
Overnight temperatures are expected to plummet in the mid 20's to
lower 30's across the valleys of Trinity county. The very dry
airmass, light valley winds and longwave cooling overnight will
allow many of the valleys of Humbodlt and Mendocino counties to dip
to near or below freezing early Monday morning. The air mass is not
exceptionally cold for NW California, so it will depend highly on
the amount of wind. Even coastal areas could see frost and freezing
temperatures early Monday morning.

Guidance indicates an upper ridge building over the forecast area
Tue and Wed as the upper trough slowly edges eastward across the
Desert SW. The warming aloft will likely promote above normal
daytime temperatures, however the dry air, light offshore flow and
clear skies will also allow temperatures to plummet each night.
Continued frost and freezing temperatures will be possible each
night in some of interior valleys.

There is a great deal of variability and spread in the guidance late
in the week, around Thursday and Friday. The ECMWF and ENS have been
consistently wetter than the GFS/GEFS and CMC. WPC clusters reflect
these differences with about 25% of 100 members wetter (over one
tenth of inch of rain) than the combined ensemble mean.

&&

.AVIATION...Stratus has developed over the valleys of much of
Humboldt and Mendocino counties. This is expected to clear quickly
this morning as high pressure and offshore flow builds into the
area. Strong northeast winds develop this afternoon. This will keep
skies clear tonight across the area. These winds are strong enough
that the some areas may see wind shear. This will be most likely in
Mendocino and Lake counties tonight as the surface winds decouple
and winds of 30 to 35 develop off the surface. MKK

&&

.MARINE...Near gale to gale force winds are in place across the
waters, although winds are much lighter within a few a miles of the
coast. This is generating steep waves of 8 to 11 feet at the buoys.
Later this morning the winds in the southern waters will start to
diminish and the gale warning expires at 9am. This looks on track,
although winds will only be slightly below gale force. With the gale
force winds just north of the area, steep seas around 12 feet will
persist and a hazardous seas warning may need to be issued through
this evening.

Tonight the winds will become more northeasterly and diminish. This
will keep the waves lower near the coast and stronger winds will be
farther offshore. This pattern is expected to persist on Monday and
Tuesday. Small craft advisories will likely be needed for the outer
waters, but closer to shore winds and seas should be fairly light.

Starting on Wednesday winds will continue to diminish and are
expected to become southerly. They are generally expected to only be
around 10 to 15 kt, but some models are showing stronger winds on
Friday as a weather system moves through the Pacific Northwest.
Confidence is low on the exact pattern, but it generally looks like
a period of lighter winds.

Late this afternoon through Monday morning a long period swell
starts to build into the waters. This swell is currently expected to
build to around 3 to 4 feet at 16 seconds by midday Monday. The
longer period swell is also expected to slowly diminish through this
time period. MKK

&&

.FIRE WEATHER...Conditions will dry out today as northeast winds
increase. An exceptionally dry airmass is forecast to spread across
the region late this afternoon and persist into Monday through
Tuesday. That airmass combined with very dry vegetation and strong
east-northeast ridgetop winds gusting from 40 to 60 mph will yield
critical to extremely critical fire weather conditions from this
afternoon through Monday morning. Very low humidities and gusty
offshore winds are expected to persist Monday night through Tuesday.

&&

.EKA WATCHES/WARNINGS/ADVISORIES...
CA...Frost Advisory from midnight tonight to 9 AM PDT Monday for
     CAZ102-103-109.

     Red Flag Warning from 11 AM this morning to 5 PM PDT Monday for
     CAZ201-203-204-211-283.

     Hard Freeze Warning from midnight tonight to 9 AM PDT Monday for
     CAZ105-107-108-110-111-114.

     Red Flag Warning from 11 AM this morning to 5 AM PDT Tuesday for
     CAZ212-264-276-277.

     Freeze Warning until 8 AM PDT this morning for CAZ107-108.

     Wind Advisory from 5 PM this afternoon to 11 AM PDT Monday for
     CAZ106-108-111-113>115.

     Freeze Warning from midnight tonight to 9 AM PDT Monday for
     CAZ106-115.

     Frost Advisory until 8 AM PDT this morning for CAZ111-114.

NORTHWEST CALIFORNIA COASTAL WATERS...Small Craft Advisory until 9 AM PDT Monday for PZZ450.

     Gale Warning until 9 PM PDT this evening for PZZ470.

     Small Craft Advisory until 9 PM PDT this evening for PZZ455.

     Gale Warning until 9 AM PDT this morning for PZZ475.

&&

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

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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
Hazardous weather outlook, Oct 25, 3:49 AM PDT, 55 minutes before
Hazardous Weather Outlook
National Weather Service Eureka CA
349 AM PDT Sun Oct 25 2020

CAZ101-112-261100-
Coastal Del Norte-Southwestern Mendocino Interior-
349 AM PDT Sun Oct 25 2020

This hazardous weather outlook is for northwest California.

.DAY ONE...Today and tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

No hazardous weather is expected at this time.

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

CAZ113-261100-
Southeastern Mendocino Interior-
349 AM PDT Sun Oct 25 2020

...RED FLAG WARNING IN EFFECT FROM 11 AM THIS MORNING TO 5 AM PDT
TUESDAY...
...WIND ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO 11 AM PDT
MONDAY...

This hazardous weather outlook is for northwest California.

.DAY ONE...Today and tonight.

A Red Flag Warning is currently in effect.
A Wind Advisory is currently in effect.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

A Red Flag Warning is currently in effect.
A Wind Advisory is currently in effect.

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

CAZ102-109-261100-
Del Norte Interior-Mendocino Coast-
349 AM PDT Sun Oct 25 2020

...RED FLAG WARNING IN EFFECT FROM 11 AM THIS MORNING TO 5 PM PDT
MONDAY...
...FROST ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM PDT
MONDAY...

This hazardous weather outlook is for northwest California.

.DAY ONE...Today and tonight.

A Red Flag Warning is currently in effect.
A Frost Advisory is currently in effect.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

A Red Flag Warning is currently in effect.

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

CAZ110-261100-
Northwestern Mendocino Interior-
349 AM PDT Sun Oct 25 2020

...RED FLAG WARNING IN EFFECT FROM 11 AM THIS MORNING TO 5 AM PDT
TUESDAY...
...HARD FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM PDT
MONDAY...

This hazardous weather outlook is for northwest California.

.DAY ONE...Today and tonight.

A Red Flag Warning is currently in effect.
A Hard Freeze Warning is currently in effect.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

A Red Flag Warning is currently in effect.

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

CAZ111-114-261100-
Northeastern Mendocino Interior-Northern Lake County-
349 AM PDT Sun Oct 25 2020

...FROST ADVISORY IN EFFECT UNTIL 8 AM PDT THIS MORNING...
...RED FLAG WARNING IN EFFECT FROM 11 AM THIS MORNING TO 5 AM PDT
TUESDAY...
...WIND ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO 11 AM PDT
MONDAY...
...HARD FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM PDT
MONDAY...

This hazardous weather outlook is for northwest California.

.DAY ONE...Today and tonight.

A Frost Advisory is currently in effect.
A Red Flag Warning is currently in effect.
A Wind Advisory is currently in effect.
A Hard Freeze Warning is currently in effect.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

A Red Flag Warning is currently in effect.
A Wind Advisory is currently in effect.

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

CAZ105-261100-
Northern Humboldt Interior-
349 AM PDT Sun Oct 25 2020

...RED FLAG WARNING IN EFFECT FROM 11 AM THIS MORNING TO 5 PM PDT
MONDAY...
...HARD FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM PDT
MONDAY...

This hazardous weather outlook is for northwest California.

.DAY ONE...Today and tonight.

A Red Flag Warning is currently in effect.
A Hard Freeze Warning is currently in effect.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

A Red Flag Warning is currently in effect.

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

CAZ106-115-261100-
Southern Humboldt Interior-Southern Lake County-
349 AM PDT Sun Oct 25 2020

...RED FLAG WARNING IN EFFECT FROM 11 AM THIS MORNING TO 5 AM PDT
TUESDAY...
...WIND ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO 11 AM PDT
MONDAY...
...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM PDT
MONDAY...

This hazardous weather outlook is for northwest California.

.DAY ONE...Today and tonight.

A Red Flag Warning is currently in effect.
A Wind Advisory is currently in effect.
A Freeze Warning is currently in effect.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

A Red Flag Warning is currently in effect.
A Wind Advisory is currently in effect.

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

CAZ103-261100-
Northern Humboldt Coast-
349 AM PDT Sun Oct 25 2020

...FROST ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM PDT
MONDAY...

This hazardous weather outlook is for northwest California.

.DAY ONE...Today and tonight.

A Frost Advisory is currently in effect.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

No hazardous weather is expected at this time.

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

CAZ104-261100-
Southwestern Humboldt-
349 AM PDT Sun Oct 25 2020

...RED FLAG WARNING IN EFFECT FROM 11 AM THIS MORNING TO 5 PM PDT
MONDAY...

This hazardous weather outlook is for northwest California.

.DAY ONE...Today and tonight.

A Red Flag Warning is currently in effect.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

A Red Flag Warning is currently in effect.

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

CAZ107-261100-
Northern Trinity-
349 AM PDT Sun Oct 25 2020

...FREEZE WARNING IN EFFECT UNTIL 8 AM PDT THIS MORNING...
...RED FLAG WARNING IN EFFECT FROM 11 AM THIS MORNING TO 5 PM PDT
MONDAY...
...HARD FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM PDT
MONDAY...

This hazardous weather outlook is for northwest California.

.DAY ONE...Today and tonight.

A Freeze Warning is currently in effect.
A Red Flag Warning is currently in effect.
A Hard Freeze Warning is currently in effect.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

A Red Flag Warning is currently in effect.

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

CAZ108-261100-
Southern Trinity-
349 AM PDT Sun Oct 25 2020

...FREEZE WARNING IN EFFECT UNTIL 8 AM PDT THIS MORNING...
...RED FLAG WARNING IN EFFECT FROM 11 AM THIS MORNING TO 5 AM PDT
TUESDAY...
...WIND ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO 11 AM PDT
MONDAY...
...HARD FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM PDT
MONDAY...

This hazardous weather outlook is for northwest California.

.DAY ONE...Today and tonight.

A Freeze Warning is currently in effect.
A Red Flag Warning is currently in effect.
A Wind Advisory is currently in effect.
A Hard Freeze Warning is currently in effect.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

A Red Flag Warning is currently in effect.
A Wind Advisory is currently in effect.

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

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 25, 4:44 AM PDTFrost AdvisoryEKADel Norte, Humboldt, Mendocino28 hr
Oct 25, 4:44 AM PDTFreeze WarningEKAHumboldt, Mendocino28 hr
Oct 25, 8:52 AM PDTHazardous Seas WarningEKA12 hr

Nearby

Hard Freeze Warnings in California, 2020Every hard freeze warning in 2020

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.