Hard Freeze Warning 5, NWS Eureka, CA

AREA FORECAST DISCUSSION
National Weather Service Eureka CA
538 AM PST Tue Feb 28 2023

.SYNOPSIS...Showers will continue affected the area through
tonight. Significant snowfall is also expected to continue
affected elevations above 1,500 to 2,000 feet. Showers and
isolated thunderstorms with small hail likely along the coast
through tonight. Drier conditions will return on Wednesday with
cold overnight low temperatures later this week. A weak shortwave
may clip the northern portion of the region on Thursday, bringing
light rain or drizzle North of Cape Mendocino. More active weather
is expected for the weekend due to a strong upper low approaching
the area.

&&

.DISCUSSION...Active weather pattern continues today with rain and
snow showers across the region. Latest GOES-West satellite imagery
shows a secondary embedded shortwave within the deep trough approaching
the West Coast this morning. Scattered showers continue moving on
shore and becoming convective. Another 1 to 2 feet is likely for
elevations above 2,000 feet MSL. However, some high resolution
guidance continues suggesting snow levels falling as low as 1,200
feet MSL with the convective showers. Additional 2 to 6 inches of
snow is expected for the to the highest elevations of highway 101
from Leggett to Willits, highway 175, and highway 20. Highways
199 and 299 will be strongly affected today where 4 to 15 inches
of snow is possible. In addition to increased precipitation rates,
this will bring another chances of isolated thunderstorms along
the North Coast through this evening. Radar doppler has indicated
lightning strikes offshore overnight. Small hail threat remain
along the coast for today due to the lingering instability and
steep lapse rates, as result the Winter Weather Advisory remain in
effect through 10PM.

Showers will diminish markedly this evening, although some light
precipitations could linger through late tonight before an upper
level high pressure build in behind the departing trough. Colder
air aloft will promote near to freezing temperatures all along
the coast with temperatures around 20 or lower in the interior.
NMB suggest there is high 98 percent of probability for
temperatures lower than 33 degrees while a 50 to 65 percent of
chance for temperatures lower than 28 degrees, especially along
the North Coast. ECMWF Extreme Forecast Index (EFI) strongly
indication below normal low temperatures along the North Coast
Wednesday morning. Have to hoisted a Hard Freezes Watch in
response.

A weak shortwave will clip the northern portion of the area on
Thursday, bringing a chance of light rain or drizzle to Del Norte
and Northern Humboldt counties. There still some uncertainties in
the timing and position of this system.

More active weather is expected late this week with a cut off low
dipping dipping and then stalling northwest of the area late this
week. This system will bring additional cold weather and snow to
the area. Additional to a gusty southerly winds ahead of the
frontal boundary, mainly over the coastal headland and exposed
ridges. Deterministic models currently place the area right on
the edge of cold air aloft, leading to significant uncertainty in
the forecast. Snowfall would generally be more spread out than the
current event, but if colder air moves south, similar amounts to
the current system are possible with multiple feet of snow above
2000 feet.

&&

.AVIATION...A cold front moving will move through today, shifting
wind direction from south this morning to west by early this
afternoon, and to the northwest by afternoon. Wind will decrease
noticeably and perhaps become more variable in direction by
tonight. Expect MVFR conditions to mainly prevail until scouring
occurs behind the aforementioned cold front Tuesday evening/night.

&&

.MARINE...A decay of the current west northwest swell continues this
morning as wind speeds decrease as well. We will likely have seas
reach predominantly small craft advisory range later this morning,
and perhaps lasting until Thursday considering latest model
forecasts. Wind speeds may reach near small craft advisory level
later today into Wednesday behind the cold front as well. A mid to
long period northwest swell is forecast to arrive by Friday with
wave heights in the 13-16 foot range.

&&

.EKA WATCHES/WARNINGS/ADVISORIES...
CA...
     Winter Weather Advisory until 10 PM PST this evening for
     CAZ101-103-109.

     Hard Freeze Watch from this evening through Wednesday
     morning for CAZ101-103.

     Winter Storm Warning until 10 PM PST this evening for
     CAZ102-104>106.

     Winter Storm Warning until 4 PM PST this afternoon for
     CAZ107-108-110-111-113>115.

NORTHWEST CALIFORNIA COASTAL WATERS...
     Hazardous Seas Warning until 9 AM PST this morning for
     PZZ450-455-470-475.

&&

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

Follow us on Facebook and Twitter at:
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
National Weather Service Eureka CA
542 AM PST Tue Feb 28 2023

CAZ112-011345-
Southwestern Mendocino Interior-
542 AM PST Tue Feb 28 2023

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...Wednesday through Monday.

No hazardous weather is expected at this time.

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

CAZ101-103-011345-
Coastal Del Norte-Northern Humboldt Coast-
542 AM PST Tue Feb 28 2023

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 10 PM PST THIS EVENING...
...HARD FREEZE WATCH IN EFFECT FROM THIS EVENING THROUGH WEDNESDAY
MORNING...

This hazardous weather outlook is for northwest California.

.DAY ONE...Today and tonight.

A Winter Weather Advisory is currently in effect.
A Hard Freeze Watch is currently in effect.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

A Hard Freeze Watch is currently in effect.

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

CAZ104-011345-
Southwestern Humboldt-
542 AM PST Tue Feb 28 2023

...WINTER STORM WARNING IN EFFECT UNTIL 10 PM PST THIS EVENING...

This hazardous weather outlook is for northwest California.

.DAY ONE...Today and tonight.

A Winter Storm Warning is currently in effect.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

No hazardous weather is expected at this time.

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

CAZ109-011345-
Mendocino Coast-
542 AM PST Tue Feb 28 2023

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 10 PM PST THIS EVENING...

This hazardous weather outlook is for northwest California.

.DAY ONE...Today and tonight.

A Winter Weather Advisory is currently in effect.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

No hazardous weather is expected at this time.

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

CAZ107-108-110-111-113>115-011345-
Northern Trinity-Southern Trinity-Northwestern Mendocino Interior-
Northeastern Mendocino Interior-Southeastern Mendocino Interior-
Northern Lake-Southern Lake-
542 AM PST Tue Feb 28 2023

...WINTER STORM WARNING IN EFFECT UNTIL 4 PM PST THIS AFTERNOON...

This hazardous weather outlook is for northwest California.

.DAY ONE...Today and tonight.

A Winter Storm Warning is currently in effect.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

No hazardous weather is expected at this time.

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

CAZ102-105-106-011345-
Del Norte Interior-Northern Humboldt Interior-
Southern Humboldt Interior-
542 AM PST Tue Feb 28 2023

...WINTER STORM WARNING IN EFFECT UNTIL 10 PM PST THIS EVENING...

This hazardous weather outlook is for northwest California.

.DAY ONE...Today and tonight.

A Winter Storm Warning is currently in effect.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

No hazardous weather is expected at this time.

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

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EUREKA CA
813 AM PST TUE FEB 28 2023

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

0812 AM     SNOW             3 WSW LEWISTON          40.69N 122.86W
02/28/2023  M6.0 INCH        TRINITY            CA   TRAINED SPOTTER

            THIS IS AN 11 HOUR SNOWFALL TOTAL. ELEVATION
            OF THE REPORT IS 1800 FEET.

&&

JMG

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EUREKA CA
829 AM PST TUE FEB 28 2023

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

0828 AM     SNOW             4 WSW DINSMORE          40.47N 123.67W
02/28/2023  M6.0 INCH        HUMBOLDT           CA   TRAINED SPOTTER

            SNOW OCCURRED OVER A 9 HOUR PERIOD FROM 11PM
            TO 8AM. ELEVATION OF THE REPORT IS 2700
            FEET.

&&

JMG

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>