Freeze Warning 6, NWS Eureka, CA

908 
WWUS76 KEKA 021036
NPWEKA

URGENT - WEATHER MESSAGE
National Weather Service Eureka CA
336 AM PDT Wed Apr 2 2025

CAZ110-111-021845-
/O.CON.KEKA.FZ.W.0005.000000T0000Z-250402T1600Z/
/O.CON.KEKA.FZ.W.0006.250403T0900Z-250403T1600Z/
Northwestern Mendocino Interior-Northeastern Mendocino Interior-
Including Willits, Covelo, Laytonville, and Potter Valley
336 AM PDT Wed Apr 2 2025

...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM PDT THIS MORNING...
...FREEZE WARNING REMAINS IN EFFECT FROM 2 AM TO 9 AM PDT THURSDAY...

* WHAT...For the first Freeze Warning, sub-freezing temperatures as 
  low as 26. For the second Freeze Warning, sub-freezing 
  temperatures as low as 28 expected.

* WHERE...Northern Mendocino Interior.

* WHEN...For the first Freeze Warning, until 9 AM PDT this morning. 
  For the second Freeze Warning, from 2 AM to 9 AM PDT Thursday.

* IMPACTS...Frost and freeze conditions could kill crops, other 
  sensitive vegetation

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

CAZ114-021600-
/O.CON.KEKA.FZ.W.0005.000000T0000Z-250402T1600Z/
Northern Lake-
Including Gravelly Valley Airport
336 AM PDT Wed Apr 2 2025

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

* WHAT...Sub-freezing temperatures as low as 26 expected.

* WHERE...Northern Lake.

* WHEN...Until 9 AM PDT this morning.

* IMPACTS...Frost and freeze conditions could kill crops, other 
  sensitive vegetation

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

CAZ113-115-021845-
/O.NEW.KEKA.FR.Y.0010.250403T0900Z-250403T1600Z/
/O.CON.KEKA.FR.Y.0009.000000T0000Z-250402T1600Z/
Southeastern Mendocino Interior-Southern Lake-
Including Middletown, Calpella, Hidden Valley Lake, Knobcone
Camp, Finley, Lakeport, Hopland, Clearlake, Clearlake Park,
Redwood Valley, Talmage, and Ukiah
336 AM PDT Wed Apr 2 2025

...FROST ADVISORY IN EFFECT FROM 2 AM TO 9 AM PDT THURSDAY...
...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM PDT THIS MORNING...

* WHAT...For the first Frost Advisory, temperatures as low as 33 
  will result in frost formation. For the second Frost Advisory, 
  temperatures as low as 33 will result in frost formation.

* WHERE...Southeastern Mendocino Interior and Southern Lake.

* WHEN...For the first Frost Advisory, until 9 AM PDT this morning. 
  For the second Frost Advisory, from 2 AM to 9 AM PDT Thursday.

* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive 
  outdoor plants may be killed if left uncovered.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

CAZ112-021845-
/O.NEW.KEKA.FR.Y.0010.250403T0900Z-250403T1600Z/
Southwestern Mendocino Interior-
Including Boonville and Comptche
336 AM PDT Wed Apr 2 2025

...FROST ADVISORY IN EFFECT FROM 2 AM TO 9 AM PDT THURSDAY...

* WHAT...Temperatures as low as 34 will result in frost formation.

* WHERE...Southwestern Mendocino Interior.

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

* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive 
  outdoor plants may be killed if left uncovered.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

For hazard areas see https://www.wrh.noaa.gov/map/?wfo=eka

JLW

602 
WWUS76 KEKA 021601
NPWEKA

URGENT - WEATHER MESSAGE
National Weather Service Eureka CA
901 AM PDT Wed Apr 2 2025

CAZ110-111-030015-
/O.EXP.KEKA.FZ.W.0005.000000T0000Z-250402T1600Z/
/O.CON.KEKA.FZ.W.0006.250403T0900Z-250403T1600Z/
Northwestern Mendocino Interior-Northeastern Mendocino Interior-
Including Covelo, Potter Valley, Willits, and Laytonville
901 AM PDT Wed Apr 2 2025

...FREEZE WARNING HAS EXPIRED...
...FREEZE WARNING REMAINS IN EFFECT FROM 2 AM TO 9 AM PDT THURSDAY...

* WHAT...For the first Freeze Warning, sub-freezing temperatures as 
  low as 26. For the second Freeze Warning, sub-freezing 
  temperatures as low as 28 expected.

* WHERE...Northern Mendocino Interior.

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

* IMPACTS...Frost and freeze conditions could kill crops, other 
  sensitive vegetation

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

CAZ114-021715-
/O.EXP.KEKA.FZ.W.0005.000000T0000Z-250402T1600Z/
Northern Lake-
Including Gravelly Valley Airport
901 AM PDT Wed Apr 2 2025

...FREEZE WARNING HAS EXPIRED...

$$

CAZ113-115-030015-
/O.EXP.KEKA.FR.Y.0009.000000T0000Z-250402T1600Z/
/O.CON.KEKA.FR.Y.0010.250403T0900Z-250403T1600Z/
Southeastern Mendocino Interior-Southern Lake-
Including Calpella, Ukiah, Middletown, Hopland, Talmage, Hidden
Valley Lake, Finley, Clearlake, Clearlake Park, Lakeport, Redwood
Valley, and Knobcone Camp
901 AM PDT Wed Apr 2 2025

...FROST ADVISORY HAS EXPIRED...
...FROST ADVISORY REMAINS IN EFFECT FROM 2 AM TO 9 AM PDT THURSDAY...

* WHAT...For the first Frost Advisory, temperatures as low as 33 
  will result in frost formation. For the second Frost Advisory, 
  temperatures as low as 33 will result in frost formation.

* WHERE...Southeastern Mendocino Interior and Southern Lake.

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

* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive 
  outdoor plants may be killed if left uncovered.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

CAZ112-030015-
/O.CON.KEKA.FR.Y.0010.250403T0900Z-250403T1600Z/
Southwestern Mendocino Interior-
Including Comptche and Boonville
901 AM PDT Wed Apr 2 2025

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

* WHAT...Temperatures as low as 34 will result in frost formation.

* WHERE...Southwestern Mendocino Interior.

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

* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive 
  outdoor plants may be killed if left uncovered.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

For hazard areas see https://www.wrh.noaa.gov/map/?wfo=eka

JLW

034 
WWUS76 KEKA 021746
NPWEKA

URGENT - WEATHER MESSAGE
National Weather Service Eureka CA
1046 AM PDT Wed Apr 2 2025

CAZ114-030815-
/O.EXA.KEKA.FZ.W.0006.250403T0900Z-250403T1600Z/
Northern Lake-
Including Gravelly Valley Airport
1046 AM PDT Wed Apr 2 2025

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

* WHAT...Sub-freezing temperatures as low as 28 expected.

* WHERE...Northern Lake.

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

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

CAZ110-111-030815-
/O.CON.KEKA.FZ.W.0006.250403T0900Z-250403T1600Z/
Northwestern Mendocino Interior-Northeastern Mendocino Interior-
Including Covelo, Laytonville, and Willits
1046 AM PDT Wed Apr 2 2025

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

* WHAT...For the first Freeze Warning, sub-freezing temperatures as 
  low as 26. For the second Freeze Warning, sub-freezing 
  temperatures as low as 28 expected.

* WHERE...Northern Mendocino Interior.

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

* IMPACTS...Frost and freeze conditions could kill crops, other 
  sensitive vegetation

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

CAZ112-113-115-030815-
/O.CON.KEKA.FR.Y.0010.250403T0900Z-250403T1600Z/
Southwestern Mendocino Interior-Southeastern Mendocino Interior-
Southern Lake-
Including Hidden Valley Lake, Hopland, Talmage, Ukiah, Clearlake
Park, Finley, Calpella, Clearlake, Redwood Valley, Boonville,
Middletown, Comptche, and Lakeport
1046 AM PDT Wed Apr 2 2025

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

* WHAT...Temperatures as low as 30 will result in frost formation.

* WHERE...Southern Mendocino Interior, and Southern Lake.

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

* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive 
  outdoor plants may be killed if left uncovered.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

For hazard areas see https://www.wrh.noaa.gov/map/?wfo=eka

JJW

787 
WWUS76 KEKA 030516
NPWEKA

URGENT - WEATHER MESSAGE
National Weather Service Eureka CA
1016 PM PDT Wed Apr 2 2025

CAZ110-111-114-031330-
/O.CON.KEKA.FZ.W.0006.250403T0900Z-250403T1600Z/
Northwestern Mendocino Interior-Northeastern Mendocino Interior-
Northern Lake-
Including Willits, Gravelly Valley Airport, Covelo, and
Laytonville
1016 PM PDT Wed Apr 2 2025

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

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

* WHERE...Northern Mendocino Interior, and Northern Lake.

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

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

CAZ112-113-115-031330-
/O.CON.KEKA.FR.Y.0010.250403T0900Z-250403T1600Z/
Southwestern Mendocino Interior-Southeastern Mendocino Interior-
Southern Lake-
Including Talmage, Hidden Valley Lake, Boonville, Lakeport,
Clearlake, Redwood Valley, Calpella, Clearlake Park, Hopland,
Ukiah, Middletown, Comptche, and Finley
1016 PM PDT Wed Apr 2 2025

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

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

* WHERE...Southern Mendocino Interior, and Southern Lake.

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

* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive 
  outdoor plants may be killed if left uncovered.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

For hazard areas see https://www.wrh.noaa.gov/map/?wfo=eka

ZVS

227 
WWUS76 KEKA 031027
NPWEKA

URGENT - WEATHER MESSAGE
National Weather Service Eureka CA
327 AM PDT Thu Apr 3 2025

CAZ110-111-114-031830-
/O.NEW.KEKA.FR.Y.0011.250404T0900Z-250404T1600Z/
/O.CON.KEKA.FZ.W.0006.000000T0000Z-250403T1600Z/
Northwestern Mendocino Interior-Northeastern Mendocino Interior-
Northern Lake-
Including Willits, Covelo, Gravelly Valley Airport, Potter
Valley, and Laytonville
327 AM PDT Thu Apr 3 2025

...FROST ADVISORY IN EFFECT FROM 2 AM TO 9 AM PDT FRIDAY...
...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM PDT THIS MORNING...

* WHAT...For the Freeze Warning, sub-freezing temperatures as low as 
  29. For the Frost Advisory, temperatures as low as 33 will result 
  in frost formation.

* WHERE...Northern Mendocino Interior, and Northern Lake.

* WHEN...For the Freeze Warning, until 9 AM PDT this morning. For 
  the Frost Advisory, from 2 AM to 9 AM PDT Friday.

* IMPACTS...Frost and freeze conditions could kill crops, other 
  sensitive vegetation

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

CAZ113-115-031830-
/O.NEW.KEKA.FR.Y.0011.250404T0900Z-250404T1600Z/
/O.CON.KEKA.FR.Y.0010.000000T0000Z-250403T1600Z/
Southeastern Mendocino Interior-Southern Lake-
Including Lakeport, Ukiah, Finley, Hidden Valley Lake, Clearlake,
Talmage, Middletown, Hopland, Clearlake Park, Calpella, and
Redwood Valley
327 AM PDT Thu Apr 3 2025

...FROST ADVISORY IN EFFECT FROM 2 AM TO 9 AM PDT FRIDAY...
...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM PDT THIS MORNING...

* WHAT...For the first Frost Advisory, temperatures as low as 33 
  will result in frost formation. For the second Frost Advisory, 
  temperatures as low as 33 will result in frost formation.

* WHERE...Southeastern Mendocino Interior and Southern Lake.

* WHEN...For the first Frost Advisory, until 9 AM PDT this morning. 
  For the second Frost Advisory, from 2 AM to 9 AM PDT Friday.

* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive 
  outdoor plants may be killed if left uncovered.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

CAZ112-031600-
/O.CON.KEKA.FR.Y.0010.000000T0000Z-250403T1600Z/
Southwestern Mendocino Interior-
Including Comptche and Boonville
327 AM PDT Thu Apr 3 2025

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

* WHAT...Temperatures as low as 34 will result in frost formation.

* WHERE...Southwestern Mendocino Interior.

* WHEN...Until 9 AM PDT this morning.

* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive 
  outdoor plants may be killed if left uncovered.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

For hazard areas see https://www.wrh.noaa.gov/map/?wfo=eka

JLW

481 
WWUS76 KEKA 031542
NPWEKA

URGENT - WEATHER MESSAGE
National Weather Service Eureka CA
842 AM PDT Thu Apr 3 2025

CAZ110-111-114-032345-
/O.EXP.KEKA.FZ.W.0006.000000T0000Z-250403T1600Z/
/O.CON.KEKA.FR.Y.0011.250404T0900Z-250404T1600Z/
Northwestern Mendocino Interior-Northeastern Mendocino Interior-
Northern Lake-
Including Covelo, Willits, Potter Valley, Laytonville, and
Gravelly Valley Airport
842 AM PDT Thu Apr 3 2025

...FREEZE WARNING WILL EXPIRE AT 9 AM PDT THIS MORNING...
...FROST ADVISORY REMAINS IN EFFECT FROM 2 AM TO 9 AM PDT FRIDAY...

* WHAT...Temperatures as low as 29 will result in frost formation.

* WHERE...Northern Mendocino Interior, and Northern Lake.

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

* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive 
  outdoor plants may be killed if left uncovered.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

CAZ113-115-032345-
/O.EXP.KEKA.FR.Y.0010.000000T0000Z-250403T1600Z/
/O.CON.KEKA.FR.Y.0011.250404T0900Z-250404T1600Z/
Southeastern Mendocino Interior-Southern Lake-
Including Ukiah, Talmage, Clearlake Park, Finley, Redwood Valley,
Hidden Valley Lake, Clearlake, Middletown, Calpella, Lakeport,
and Hopland
842 AM PDT Thu Apr 3 2025

...FROST ADVISORY WILL EXPIRE AT 9 AM PDT THIS MORNING...
...FROST ADVISORY REMAINS IN EFFECT FROM 2 AM TO 9 AM PDT FRIDAY...

* WHAT...Temperatures as low as 32 will result in frost formation.

* WHERE...Southeastern Mendocino Interior and Southern Lake.

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

* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive 
  outdoor plants may be killed if left uncovered.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

CAZ112-031645-
/O.EXP.KEKA.FR.Y.0010.000000T0000Z-250403T1600Z/
Southwestern Mendocino Interior-
Including Boonville and Comptche
842 AM PDT Thu Apr 3 2025

...FROST ADVISORY WILL EXPIRE AT 9 AM PDT THIS MORNING...

$$

For hazard areas see https://www.wrh.noaa.gov/map/?wfo=eka

JHW

AREA FORECAST DISCUSSION
National Weather Service Eureka CA
341 PM PDT Tue Apr 1 2025

.SYNOPSIS...The threat for showers and thunderstorms with small
hail ends as a cold upper low progresses south. Clearing and
drying will allow for some colder overnight lows. A sharp warmup
with building high pressure can be expected for the end of the
week, followed by some rain chances.

&&

.DISCUSSION...Afternoon radar shows some lingering light showers
moving through as a cold, upper low proceeds south. Instability
will continue weakening, along with the chances for stronger
showers and thunderstorms that have been producing prolific small
hail on occasion. Though the usual post frontal deterrents for
cold overnight lows will exist tonight, that is lingering cloud
cover and moisture, and chance for developing fog, there is a
potential for frost and freezing temperatures in some of our
inland locations where the growing season has officially begun. A
Frost Advisory and Freeze Warning have been hoisted for interior
Mendocino and Lake County. There are also frosty temperatures of
36 degrees or less forecast for interior Humboldt, but confidence
is lower there for the reasons outlined above. Growing season has
begun for interior Humboldt today, so it will be closely watched,
and a Frost Advisory may be warranted is drying and clearing
occurs trends sooner. Confidence is higher for cooler temps and
frost/freeze Wednesday night and Thursday morning.

A stout area of high pressure will then amplify in Friday and
through the weekend, and temperatures will nicely warm in
response. The apex of the warming will be Saturday, when low to
mid 60s are forecast for the coast, and low to mid 70s for the
interior valleys. Rain chances increase late Saturday and Sunday
from a clipping weather system. If cloudcover arrives earlier on
Saturday, temperatures may be held down a bit. Currently,
rainfall looks light with this system, with probability of 24
hour rainfall over 0.50 inch 40-60% for the Humboldt through Del
Norte Sunday and Monday.There may be some increased southerly
winds, especially if the low takes a more southerly track. There
are currently low probabilities currently low for wind gusts over
25 mph. /JJW

&&

.AVIATION...Once again conditions have been predominantly VFR with
difficult to time periodic reductions in visibilities and ceilings
in moderate to heavy rain in the stronger convection. Convective
allowing models continue to indicate shower activity spreading over
the area tonight. Impacts in terminals will continue. but should
decrease on Wednesday as northerly breezes increase and warmer air
results in greater stability.  Gusty northwesterly winds this
evening should also develop at the terminals with low level wind
shear after surface wind decouple later this evening. Confidence
KUKI will fog up is not high with cloud cover and mixing in the
boundary layer through the night. DB

&&

.MARINE...Hazardous seas warning for steep westerly swell and
steeper NW wind waves continues for the southern waters tonight.
Gale force gust are still not impossible based on the convective
allowing models and HREF means. Probabilities are highest in the lee
of Cape, however the duration of the gale gust appears short lived
and confined just downwind of Cape Mendocino. Otherwise, northerly
winds will fill in across all waters tonight as a cold upper trough
shifts into the Great Basin and high pressure offshore builds closer
to the coast. Steep northerly winds will likely continue on Wed,
highest south of Cape Mendocino. Moderate ti fresh northerly breezes
around 20kt and steep wind waves will continue Wed into Thu, and
should start to subside on Friday. A lull is expected before winds
shift to southerly over the weekend. How strong winds get is not
certain, but current NBM guidance has low probabilities (<20% chance
for gusts to 25 kt. Now there is a slight risk for sneaker waves as
a long period westerly swell group builds. DB

&&

.EKA WATCHES/WARNINGS/ADVISORIES...
CA...
     Winter Weather Advisory until 5 PM PDT this afternoon for
     CAZ105.

     Winter Storm Warning until 5 PM PDT this afternoon for
     CAZ107-108.

NORTHWEST CALIFORNIA COASTAL WATERS...
     Small Craft Advisory until 4 AM PDT Wednesday for PZZ450.

     Small Craft Advisory until 5 AM PDT Thursday for PZZ455.

     Hazardous Seas Warning until 9 PM PDT this evening for
     PZZ470.

     Hazardous Seas Warning until 3 AM PDT Wednesday for PZZ475.

&&

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For forecast zone information
see the forecast zone map online:
https://www.weather.gov/images/eka/zonemap.png

Preliminary Local Storm Report
National Weather Service Eureka CA
949 PM PDT Tue Apr 1 2025

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0700 AM     Snow             2 WNW Ruth              40.29N 123.44W
04/01/2025  M8.0 Inch        Trinity            CA   Trained Spotter

            Received 8 inches between 7-9am. Station
            Elevation: 3094 ft.

&&

 EYS