Alert archive / California / Winter Storm Warnings in 2023

Winter Storm Warning 10, NWS Eureka, CA

March 8, 2023Trinity County, California

NWS Eureka, CA issued this winter storm warning at Mar 8, 2023, 2:09 PM PST for Trinity County, California. It took effect at Mar 9, 2023, 7:00 AM PST. It was in force for 27 hr. 6 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Mar 8, 2023, 2:09 PM PST (22:09 UTC)
In effect from
Mar 9, 2023, 7:00 AM PST
Expired
Mar 10, 2023, 10:00 AM PST
In force
27 hr
Issued by
NWS Eureka, CA

County Trinity County, CA

The radar

The Eureka (Bunker Hill) radar (KBHX), 101 km from the middle of the area, began a volume at 22:11 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.

What was reported inside it

TimeReportWhereRemark
Mar 9, 3:05 PM PSTSNOW 488 Sw Trinity Center, CA3 TO 4 INCHES OF SNOW IN LONG CANYON NEAR TRINITY CENTER. ELEVATION AROUND 3600 FEET.
Mar 9, 4:00 PM PSTHEAVY SNOW 510 Ne Weaverville, CA
Mar 10, 2:00 AM PSTHEAVY SNOW 4210 Ne Weaverville, CASNOW STARTED AT 9AM ON THE 9TH. STATION ELEVATION: 2650 FT.
Mar 10, 6:00 AM PSTSNOW 82 Wnw Ruth, CA8 INCHES OF NEW SNOW, HEAVIEST AROUND 3AM. SNOW STOPPED AROUND 6AM.
Mar 10, 8:00 AM PSTHEAVY SNOW 241 N Carrville, CACOFFEE CREEK, 2800 FT, APPROXIMATELY, 2 FEET OVER NIGHT, VERY WET! LOCATION ESTIMATED BASED ON ABOVE INFORMATION FROM SOCIAL MEDIA.
Mar 10, 8:48 AM PSTSNOW 18Hayfork, CA6 INCHES TO 3 FOOT DRIFTS WITH ABOUT 18 INCH AVERAGE AT 3050 FEET.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Medford/Jackson, OR (KMFR), launched 12:00Z, 10.2 hours before the alert went out and 193 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, Medford/Jackson, OR at 12:00Z on 2023-03-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 7 joules per kilogram.LCLLFCEL10008507005003002001001 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, Medford/Jackson, OR at 12:00Z on 2023-03-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -15 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
7 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
432 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
-15 m²/s²
0-3 km storm-relative helicity
40 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

890 
WWUS46 KEKA 082209
WSWEKA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Eureka CA
209 PM PST Wed Mar 8 2023

...

CAZ107-090615-
/O.UPG.KEKA.WS.A.0006.230309T1500Z-230311T0300Z/
/O.NEW.KEKA.WS.W.0010.230309T1500Z-230311T0300Z/
Northern Trinity-
209 PM PST Wed Mar 8 2023

...WINTER STORM WARNING IN EFFECT FROM 7 AM THURSDAY TO 7 PM PST
FRIDAY ABOVE 2500 FEET...

* WHAT...Heavy snow expected above 2500 feet. Total snow
  accumulations of 5 to 10 inches as low as 2500 feet and up to 3
  feet over 5000 feet. Winds gusting as high as 50 mph.

* WHERE...Northern Trinity County.

* WHEN...From 7 AM Thursday to 7 PM PST Friday.

* IMPACTS...Travel could be very difficult to impossible. The 
  hazardous conditions could impact the morning or evening 
  commute. Gusty winds could bring down tree branches.

* ADDITIONAL DETAILS...Snow will start at the valley floors rising
  to 2500 feet Thursday evening. These may continue to rise to
  nearly 4000 feet on Friday. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

The latest road conditions for the state of California can be
obtained by calling 1-800-GAS-ROAD.

&&

$$

CAZ108-090615-
/O.UPG.KEKA.WS.A.0006.230309T1500Z-230310T0300Z/
/O.NEW.KEKA.WS.W.0010.230309T1500Z-230310T0300Z/
Southern Trinity-
209 PM PST Wed Mar 8 2023

...WINTER STORM WARNING IN EFFECT FROM 7 AM TO 7 PM PST THURSDAY
ABOVE 3500 FEET...

* WHAT...Heavy snow expected above 3500 feet. Total snow
  accumulations of 4 to 8 inches. Winds gusting as high as 50 
  mph.

* WHERE...Southern Trinity County.

* WHEN...From 7 AM to 7 PM PST Thursday.

* IMPACTS...Travel could be very difficult to impossible. The 
  hazardous conditions could impact the morning or evening 
  commute. Gusty winds could bring down tree branches.

* ADDITIONAL DETAILS...Snow will start at the valley floors rising
  to 5000 feet by Thursday evening. These may drop back to nearly
  4000 feet on Friday. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

The latest road conditions for the state of California can be
obtained by calling 1-800-GAS-ROAD.

&&

$$

CAZ102-090615-
/O.NEW.KEKA.WS.A.0007.230310T0800Z-230311T0300Z/
Del Norte Interior-
209 PM PST Wed Mar 8 2023

...WINTER STORM WATCH IN EFFECT FROM LATE THURSDAY NIGHT THROUGH
FRIDAY EVENING ABOVE 2500 FEET...

* WHAT...Heavy snow possible above 2500 feet. Total snow
  accumulations of 8 to 12 inches possible with local amounts up
  to feet at the higher elevations. Winds could gust as high as 
  45 mph.

* WHERE...Del Norte Interior County.

* WHEN...From late Thursday night through Friday evening.

* IMPACTS...Travel could be very difficult to impossible. The 
  hazardous conditions could impact the morning or evening 
  commute. Gusty winds could bring down tree branches.

* ADDITIONAL DETAILS...Snow will start at the valley floors rising
  over 4000 feet by Thursday afternoon. These will start to drop
  again Thursday night dropping to 2500 feet by Friday morning.  

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation. 

&&

$$

CAZ105-106-090615-
/O.NEW.KEKA.WS.A.0007.230310T1200Z-230311T0300Z/
Northern Humboldt Interior-Southern Humboldt Interior-
209 PM PST Wed Mar 8 2023

...WINTER STORM WATCH IN EFFECT FROM LATE THURSDAY NIGHT THROUGH
FRIDAY EVENING ABOVE 2500 FEET...

* WHAT...Heavy snow possible above 2500 feet. Total snow 
  accumulations of up to 12 inches possible. Winds could gust as 
  high as 40 mph.

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

* WHEN...From late Thursday night through Friday evening.

* IMPACTS...Travel could be very difficult to impossible. The 
  hazardous conditions could impact the morning or evening 
  commute.

* ADDITIONAL DETAILS...Snow will start at the valley floors rising
  over 5000 feet by Thursday afternoon. These will start to drop
  again late Thursday night dropping to 2500 feet Friday morning.
  

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation. 

&&

$$
10 follow-up statements
376 
WWUS46 KEKA 090536
WSWEKA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Eureka CA
936 PM PST Wed Mar 8 2023



CAZ102-090645-
/O.CAN.KEKA.WS.A.0007.230310T0800Z-230311T0300Z/
Del Norte Interior-
936 PM PST Wed Mar 8 2023

...WINTER STORM WATCH IS CANCELLED...



$$

CAZ108-091345-
/O.EXT.KEKA.WS.W.0010.230309T1500Z-230310T0000Z/
Southern Trinity-
936 PM PST Wed Mar 8 2023

...WINTER STORM WARNING NOW IN EFFECT FROM 7 AM TO 4 PM PST
THURSDAY ABOVE 2500 FEET...

* WHAT...Heavy snow expected above 2500 feet. Total snow
  accumulations of 6 to 10 inches. Winds gusting as high as 50 
  mph.

* WHERE...Southern Trinity County.

* WHEN...From 7 AM to 4 PM PST Thursday.

* IMPACTS...Travel could be very difficult to impossible. The
  hazardous conditions could impact the morning commute. Gusty
  winds could bring down tree branches.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

The latest road conditions for the state of California can be
obtained by calling 1-800-GAS-ROAD.

&&

$$

CAZ107-091345-
/O.CON.KEKA.WS.W.0010.230309T1500Z-230311T0300Z/
Northern Trinity-
936 PM PST Wed Mar 8 2023

...WINTER STORM WARNING REMAINS IN EFFECT FROM 7 AM THURSDAY TO
7 PM PST FRIDAY ABOVE 2500 FEET...

* WHAT...Heavy snow expected above 2500 feet. Total snow
  accumulations of 7 to 12 inches at 2500 feet with higher amounts
  across taller ridges. Winds gusting as high as 50 mph.

* WHERE...Northern Trinity County.

* WHEN...From 7 AM Thursday to 7 PM PST Friday.

* IMPACTS...Travel could be very difficult to impossible. The
  hazardous conditions could impact the morning or evening
  commute. Gusty winds could bring down tree branches.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

The latest road conditions for the state of California can be
obtained by calling 1-800-GAS-ROAD.

&&

$$

CAZ105-106-091345-
/O.UPG.KEKA.WS.A.0007.230310T1200Z-230311T0300Z/
/O.NEW.KEKA.WW.Y.0017.230310T1200Z-230311T0300Z/
Northern Humboldt Interior-Southern Humboldt Interior-
936 PM PST Wed Mar 8 2023

...WINTER WEATHER ADVISORY IN EFFECT FROM 4 AM TO 7 PM PST FRIDAY
ABOVE 2500 FEET...

* WHAT...Snow expected above 2500 feet. Total snow accumulations
  of 2 to 5 inches near 2500 feet with higher amounts across 
  taller ridges. Winds gusting as high as 40 mph.

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

* WHEN...From 4 AM to 7 PM PST Friday.

* IMPACTS...Travel could be very difficult to impossible. The
  hazardous conditions could impact the morning or evening
  commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state of California can be
obtained by calling 1-800-GAS-ROAD.

&&

$$
398 
WWUS46 KEKA 091321
WSWEKA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Eureka CA
521 AM PST Thu Mar 9 2023

CAZ107-092130-
/O.EXT.KEKA.WS.W.0010.230309T1500Z-230311T0000Z/
Northern Trinity-
521 AM PST Thu Mar 9 2023

...WINTER STORM WARNING NOW IN EFFECT UNTIL 4 PM PST FRIDAY ABOVE
2500 FEET...

* WHAT...Heavy snow expected above 2500 feet. Total snow 
  accumulations of 7 to 12 inches at 2500 feet with higher 
  amounts across taller ridges. Winds gusting as high as 50 mph.

* WHERE...Northern Trinity County.

* WHEN...Until 4 PM PST Friday.

* IMPACTS...Travel could be very difficult to impossible. The 
  hazardous conditions could impact the morning or evening 
  commute. Gusty winds could bring down tree branches.



PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

The latest road conditions for the state of California can be
obtained by calling 1-800-GAS-ROAD.

&&

$$

CAZ108-092130-
/O.CON.KEKA.WS.W.0010.230309T1500Z-230310T0000Z/
Southern Trinity-
521 AM PST Thu Mar 9 2023

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 PM PST THIS
AFTERNOON ABOVE 2500 FEET...

* WHAT...Heavy snow expected above 2500 feet. Total snow 
  accumulations of 6 to 10 inches. Winds gusting as high as 50 
  mph.

* WHERE...Southern Trinity County.

* WHEN...From 7 AM to 4 PM PST Thursday.

* IMPACTS...Travel could be very difficult to impossible. The 
  hazardous conditions could impact the morning commute. Gusty 
  winds could bring down tree branches.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

The latest road conditions for the state of California can be
obtained by calling 1-800-GAS-ROAD.

&&

$$

CAZ105-106-092130-
/O.EXT.KEKA.WW.Y.0017.230310T1200Z-230311T0000Z/
Northern Humboldt Interior-Southern Humboldt Interior-
521 AM PST Thu Mar 9 2023

...WINTER WEATHER ADVISORY NOW IN EFFECT FROM 4 AM TO 4 PM PST
FRIDAY ABOVE 2500 FEET...

* WHAT...Snow expected above 2500 feet. Total snow accumulations 
  of 2 to 5 inches near 2500 feet with higher amounts across 
  taller ridges. Winds gusting as high as 40 mph.

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

* WHEN...From 4 AM to 4 PM PST Friday.

* IMPACTS...Travel could be very difficult to impossible. The 
  hazardous conditions could impact the morning or evening 
  commute.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state of California can be
obtained by calling 1-800-GAS-ROAD.

&&

$$
841 
WWUS46 KEKA 092244
WSWEKA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Eureka CA
244 PM PST Thu Mar 9 2023

CAZ108-100645-
/O.EXA.KEKA.WW.Y.0017.230310T1200Z-230311T0000Z/
/O.CON.KEKA.WS.W.0010.000000T0000Z-230310T0000Z/
Southern Trinity-
244 PM PST Thu Mar 9 2023

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 PM PST THIS
AFTERNOON ABOVE 2500 FEET...
...WINTER WEATHER ADVISORY IN EFFECT FROM 4 AM TO 4 PM PST FRIDAY
ABOVE 2500 FEET...

* WHAT...For the Winter Storm Warning above 2500 feet, heavy wet 
  snow. Additional snow accumulations of up to 3 inches. Winds 
  gusting as high as 55 mph. For the Winter Weather Advisory 
  above 2500 feet, snow expected. Total snow accumulations of up 
  to 3 inches. Winds gusting as high as 45 mph.

* WHERE...Southern Trinity County.

* WHEN...For the Winter Storm Warning, until 4 PM PST this 
  afternoon. For the Winter Weather Advisory, from 4 AM to 4 PM 
  PST Friday.

* IMPACTS...Travel could be very difficult. The hazardous 
  conditions could impact the morning or evening commute. Strong 
  winds could cause tree damage.

* ADDITIONAL DETAILS...Snow levels are expected to rise this
  afternoon before falling again late tonight.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

Slow down and use caution while traveling. 

The latest road conditions for the state of California can be
obtained by calling 1-800-GAS-ROAD.

&&

$$

CAZ107-100645-
/O.CON.KEKA.WS.W.0010.000000T0000Z-230311T0000Z/
Northern Trinity-
244 PM PST Thu Mar 9 2023

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 PM PST FRIDAY
ABOVE 2500 FEET...

* WHAT...Heavy snow above 2500 feet. Additional snow accumulations
  of 6 to 12 inches with amounts over two feet at the higher
  elevations. Winds gusting as high as 60 mph this through the
  evening on the higher ridges.

* WHERE...Northern Trinity County.

* WHEN...Until 4 PM PST Friday.

* IMPACTS...Travel could be very difficult to impossible. The 
  hazardous conditions could impact the morning or evening 
  commute. Strong winds could cause tree damage.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

The latest road conditions for the state of California can be
obtained by calling 1-800-GAS-ROAD.

&&

$$

CAZ102-100645-
/O.EXB.KEKA.WW.Y.0017.230310T0900Z-230311T0000Z/
Del Norte Interior-
244 PM PST Thu Mar 9 2023

...WINTER WEATHER ADVISORY IN EFFECT FROM 1 AM TO 4 PM PST FRIDAY
ABOVE 2500 FEET...

* WHAT...Snow expected above 2500 feet. Total snow accumulations
  of 3 to 5 inches with up to a foot over the higher elevations. 
  Winds gusting as high as 55 mph.

* WHERE...Del Norte Interior County.

* WHEN...From 1 AM to 4 PM PST Friday.

* IMPACTS...Travel could be very difficult to impossible. The 
  hazardous conditions could impact the morning commute. Strong 
  winds could cause tree damage.

* ADDITIONAL DETAILS...Snow levels will fall to 2000 feet late
  tonight. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state of California can be
obtained by calling 1-800-GAS-ROAD.

&&

$$

CAZ105-100645-
/O.EXT.KEKA.WW.Y.0017.230310T0900Z-230311T0000Z/
Northern Humboldt Interior-
244 PM PST Thu Mar 9 2023

...WINTER WEATHER ADVISORY NOW IN EFFECT FROM 1 AM TO 4 PM PST
FRIDAY ABOVE 2500 FEET...

* WHAT...Snow expected above 2500 feet. Total snow accumulations
  of up to 3 to 6 inches. Winds gusting as high as 45 mph.

* WHERE...Northern Humboldt Interior County.

* WHEN...From 1 AM to 4 PM PST Friday.

* IMPACTS...Travel could be very difficult to impossible. The 
  hazardous conditions could impact the morning commute.

* ADDITIONAL DETAILS...Snow levels will fall to 2500 feet late 
  tonight.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state of California can be
obtained by calling 1-800-GAS-ROAD.

&&

$$

CAZ106-100645-
/O.CON.KEKA.WW.Y.0017.230310T1200Z-230311T0000Z/
Southern Humboldt Interior-
244 PM PST Thu Mar 9 2023

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 AM TO 4 PM
PST FRIDAY ABOVE 2500 FEET...

* WHAT...Snow expected above 2500 feet. Total snow accumulations 
  of up to 3 inches. Winds gusting as high as 35 mph.

* WHERE...Southern Humboldt Interior County.

* WHEN...From 4 AM to 4 PM PST Friday.

* IMPACTS...Travel could be very difficult. The hazardous 
  conditions could impact the morning commute.

* ADDITIONAL DETAILS...Snow levels will fall to 2500 feet early
  Friday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state of California can be
obtained by calling 1-800-GAS-ROAD.

&&

$$
957 
WWUS46 KEKA 100002
WSWEKA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Eureka CA
402 PM PST Thu Mar 9 2023

CAZ108-100815-
/O.EXP.KEKA.WS.W.0010.000000T0000Z-230310T0000Z/
/O.NEW.KEKA.WS.W.0011.230310T0002Z-230310T0200Z/
/O.CON.KEKA.WW.Y.0017.230310T1200Z-230311T0000Z/
Southern Trinity-
402 PM PST Thu Mar 9 2023

...WINTER STORM WARNING IN EFFECT UNTIL 6 PM PST THIS EVENING
ABOVE 2500 FEET...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 AM TO 4 PM
PST FRIDAY ABOVE 2500 FEET...
...WINTER STORM WARNING HAS EXPIRED...

* WHAT...For the Winter Storm Warning above 2500 feet, for snow.
  Winds gusting as high as 60 mph. Snow accumulations for an
  additional 2 to 4 inches. For the Winter Weather Advisory above
  2500 feet, snow expected. Total snow accumulations of up to 3 
  inches. Winds gusting as high as 45 mph.

* WHERE...Southern Trinity County.

* WHEN...For the Winter Storm Warning, until 6 PM PST this 
  evening. For the Winter Weather Advisory, from 4 AM to 4 PM 
  PST Friday.

* IMPACTS...Travel could be very difficult. The hazardous 
  conditions could impact the morning or evening commute. Strong 
  winds could cause tree damage.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. Prepare for possible power
outages. 

Slow down and use caution while traveling. 

The latest road conditions for the state of California can be
obtained by calling 1-800-GAS-ROAD.

&&

$$

CAZ107-100815-
/O.CON.KEKA.WS.W.0010.000000T0000Z-230311T0000Z/
Northern Trinity-
402 PM PST Thu Mar 9 2023

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 PM PST FRIDAY
ABOVE 2500 FEET...

* WHAT...Heavy snow above 2500 feet. Additional snow 
  accumulations of 6 to 12 inches with amounts over two feet at 
  the higher elevations. Winds gusting as high as 60 mph this 
  through the evening on the higher ridges.

* WHERE...Northern Trinity County.

* WHEN...Until 4 PM PST Friday.

* IMPACTS...Travel could be very difficult to impossible. The 
  hazardous conditions could impact the morning or evening 
  commute. Strong winds could cause tree damage.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

The latest road conditions for the state of California can be
obtained by calling 1-800-GAS-ROAD.

&&

$$

CAZ102-105-100815-
/O.CON.KEKA.WW.Y.0017.230310T0900Z-230311T0000Z/
Del Norte Interior-Northern Humboldt Interior-
402 PM PST Thu Mar 9 2023

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 1 AM TO 4 PM
PST FRIDAY ABOVE 2500 FEET...

* WHAT...Snow expected above 2500 feet. Total snow accumulations 
  of 3 to 5 inches with up to a foot over the higher elevations. 
  Winds gusting as high as 55 mph.

* WHERE...Del Norte Interior County.

* WHEN...From 1 AM to 4 PM PST Friday.

* IMPACTS...Travel could be very difficult to impossible. The 
  hazardous conditions could impact the morning commute. Strong 
  winds could cause tree damage.

* ADDITIONAL DETAILS...Snow levels will fall to 2000 feet late 
  tonight.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state of California can be
obtained by calling 1-800-GAS-ROAD.

&&

$$

CAZ106-100815-
/O.CON.KEKA.WW.Y.0017.230310T1200Z-230311T0000Z/
Southern Humboldt Interior-
402 PM PST Thu Mar 9 2023

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 AM TO 4 PM
PST FRIDAY ABOVE 2500 FEET...

* WHAT...Snow expected above 2500 feet. Total snow accumulations 
  of up to 3 inches. Winds gusting as high as 35 mph.

* WHERE...Southern Humboldt Interior County.

* WHEN...From 4 AM to 4 PM PST Friday.

* IMPACTS...Travel could be very difficult. The hazardous 
  conditions could impact the morning commute.

* ADDITIONAL DETAILS...Snow levels will fall to 2500 feet early 
  Friday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state of California can be
obtained by calling 1-800-GAS-ROAD.

&&

$$
532 
WWUS46 KEKA 100151
WSWEKA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Eureka CA
551 PM PST Thu Mar 9 2023

CAZ108-101000-
/O.EXT.KEKA.WS.W.0011.000000T0000Z-230310T0400Z/
/O.CON.KEKA.WW.Y.0017.230310T1200Z-230311T0000Z/
Southern Trinity-
551 PM PST Thu Mar 9 2023

...WINTER STORM WARNING NOW IN EFFECT UNTIL 8 PM PST THIS EVENING
ABOVE 2500 FEET...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 AM TO 4 PM
PST FRIDAY ABOVE 2500 FEET...

* WHAT...For the Winter Storm Warning above 2500 feet, heavy snow.
  Winds gusting as high as 60 mph. For the Winter Weather Advisory
  above 2500 feet, snow expected. Total snow accumulations of 3 to
  5 inches. Winds gusting as high as 45 mph.

* WHERE...Southern Trinity County.

* WHEN...For the Winter Storm Warning, until 8 PM PST this 
  evening. For the Winter Weather Advisory, from 4 AM to 4 PM 
  PST Friday.

* IMPACTS...Travel could be very difficult. The hazardous 
  conditions could impact the morning commute. Strong winds 
  could cause tree damage.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. Prepare for possible power
outages. 

Slow down and use caution while traveling. 

The latest road conditions for the state of California can be
obtained by calling 1-800-GAS-ROAD.

&&

$$

CAZ107-101000-
/O.CON.KEKA.WS.W.0010.000000T0000Z-230311T0000Z/
Northern Trinity-
551 PM PST Thu Mar 9 2023

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 PM PST FRIDAY
ABOVE 2500 FEET...

* WHAT...Heavy snow above 2500 feet. Additional snow 
  accumulations of 5 to 12 inches. Winds gusting as high as 55 
  mph.

* WHERE...Northern Trinity County.

* WHEN...Until 4 PM PST Friday.

* IMPACTS...Travel could be very difficult to impossible. The 
  hazardous conditions could impact the morning commute. Strong 
  winds could cause tree damage.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

The latest road conditions for the state of California can be
obtained by calling 1-800-GAS-ROAD.

&&

$$

CAZ102-105-101000-
/O.CON.KEKA.WW.Y.0017.230310T0900Z-230311T0000Z/
Del Norte Interior-Northern Humboldt Interior-
551 PM PST Thu Mar 9 2023

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 1 AM TO 4 PM
PST FRIDAY ABOVE 2500 FEET...

* WHAT...Snow expected above 2500 feet. Total snow accumulations
  of 3 to 5 inches. Winds gusting as high as 50 mph.

* WHERE...Del Norte Interior and Northern Humboldt Interior 
  Counties.

* WHEN...From 1 AM to 4 PM PST Friday.

* IMPACTS...Travel could be very difficult to impossible. The
  hazardous conditions could impact the morning commute. Gusty
  winds could bring down tree branches.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state of California can be
obtained by calling 1-800-GAS-ROAD.

&&

$$

CAZ106-101000-
/O.CON.KEKA.WW.Y.0017.230310T1200Z-230311T0000Z/
Southern Humboldt Interior-
551 PM PST Thu Mar 9 2023

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 AM TO 4 PM
PST FRIDAY ABOVE 2500 FEET...

* WHAT...Snow expected above 2500 feet. Total snow accumulations 
  of up to 3 inches. Winds gusting as high as 35 mph.

* WHERE...Southern Humboldt Interior County.

* WHEN...From 4 AM to 4 PM PST Friday.

* IMPACTS...Travel could be very difficult. The hazardous
  conditions could impact the morning commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state of California can be
obtained by calling 1-800-GAS-ROAD.

&&

$$
631 
WWUS46 KEKA 100217
WSWEKA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Eureka CA
617 PM PST Thu Mar 9 2023

CAZ108-101030-
/O.CAN.KEKA.WW.Y.0017.230310T1200Z-230311T0000Z/
/O.EXT.KEKA.WS.W.0011.000000T0000Z-230310T1800Z/
Southern Trinity-
617 PM PST Thu Mar 9 2023

...WINTER STORM WARNING NOW IN EFFECT UNTIL 10 AM PST FRIDAY
ABOVE 2500 FEET...

* WHAT...Heavy snow above 2500 feet. Additional snow accumulations
  of 5 to 8 inches. Winds gusting as high as 55 mph. Snow may
  briefly change to rain during the evening before switching back
  to snow later tonight.

* WHERE...Southern Trinity County.

* WHEN...Until 10 AM PST Friday.

* IMPACTS...Travel could be very difficult. The hazardous 
  conditions could impact the morning commute. Strong winds 
  could cause tree damage.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

The latest road conditions for the state of California can be
obtained by calling 1-800-GAS-ROAD.

&&

$$

CAZ107-101030-
/O.EXT.KEKA.WS.W.0010.000000T0000Z-230310T1800Z/
Northern Trinity-
617 PM PST Thu Mar 9 2023

...WINTER STORM WARNING NOW IN EFFECT UNTIL 10 AM PST FRIDAY
ABOVE 2500 FEET...

* WHAT...Heavy snow above 2500 feet. Additional snow 
  accumulations of 5 to 12 inches. Winds gusting as high as 55 
  mph.

* WHERE...Northern Trinity County.

* WHEN...Until 10 AM PST Friday.

* IMPACTS...Travel could be very difficult to impossible. The 
  hazardous conditions could impact the morning commute. Strong 
  winds could cause tree damage.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

The latest road conditions for the state of California can be
obtained by calling 1-800-GAS-ROAD.

&&

$$

CAZ102-105-106-101030-
/O.EXT.KEKA.WW.Y.0017.230310T0217Z-230310T1800Z/
Del Norte Interior-Northern Humboldt Interior-
Southern Humboldt Interior-
617 PM PST Thu Mar 9 2023

...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 10 AM PST FRIDAY
ABOVE 2500 FEET...

* WHAT...Snow above 2500 feet. Additional snow accumulations of 2
  to 6 inches. Winds gusting as high as 55 mph.

* WHERE...Del Norte Interior, Northern Humboldt Interior and 
  Southern Humboldt Interior Counties.

* WHEN...Until 10 AM PST Friday.

* IMPACTS...Travel could be very difficult to impossible. The 
  hazardous conditions could impact the morning commute. Strong 
  winds could cause tree damage.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state of California can be
obtained by calling 1-800-GAS-ROAD.

&&

$$
064 
WWUS46 KEKA 100220
WSWEKA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Eureka CA
620 PM PST Thu Mar 9 2023

CAZ102-105-106-101030-
/O.CAN.KEKA.WW.Y.0017.000000T0000Z-230310T1800Z/
/O.NEW.KEKA.WW.Y.0018.230310T0800Z-230310T1800Z/
Del Norte Interior-Northern Humboldt Interior-
Southern Humboldt Interior-
620 PM PST Thu Mar 9 2023

...WINTER WEATHER ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO
10 AM PST FRIDAY ABOVE 2500 FEET...

* WHAT...Snow expected above 2500 feet. Total snow accumulations
  of 2 to 7 inches. Winds gusting as high as 50 mph.

* WHERE...Del Norte Interior, Northern Humboldt Interior and 
  Southern Humboldt Interior Counties.

* WHEN...From midnight tonight to 10 AM PST Friday.

* IMPACTS...Travel could be very difficult to impossible. The
  hazardous conditions could impact the morning commute. Strong
  winds could cause tree damage.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state of California can be
obtained by calling 1-800-GAS-ROAD.

&&

$$

CAZ107-101030-
/O.CON.KEKA.WS.W.0010.000000T0000Z-230310T1800Z/
Northern Trinity-
620 PM PST Thu Mar 9 2023

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST FRIDAY
ABOVE 2500 FEET...

* WHAT...Heavy snow above 2500 feet. Additional snow 
  accumulations of 5 to 12 inches. Winds gusting as high as 55 
  mph.

* WHERE...Northern Trinity County.

* WHEN...Until 10 AM PST Friday.

* IMPACTS...Travel could be very difficult to impossible. The 
  hazardous conditions could impact the morning commute. Strong 
  winds could cause tree damage.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

The latest road conditions for the state of California can be
obtained by calling 1-800-GAS-ROAD.

&&

$$

CAZ108-101030-
/O.CON.KEKA.WS.W.0011.000000T0000Z-230310T1800Z/
Southern Trinity-
620 PM PST Thu Mar 9 2023

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST FRIDAY
ABOVE 2500 FEET...

* WHAT...Heavy snow above 2500 feet. Additional snow accumulations
  of 5 to 8 inches. Winds gusting as high as 55 mph. Snow may
  briefly change to rain during the evening before switching back
  to snow later tonight.

* WHERE...Southern Trinity County.

* WHEN...Until 10 AM PST Friday.

* IMPACTS...Travel could be very difficult. The hazardous 
  conditions could impact the morning commute. Strong winds 
  could cause tree damage.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

The latest road conditions for the state of California can be
obtained by calling 1-800-GAS-ROAD.

&&

$$
970 
WWUS46 KEKA 101022
WSWEKA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Eureka CA
222 AM PST Fri Mar 10 2023

CAZ107-101800-
/O.CON.KEKA.WS.W.0010.000000T0000Z-230310T1800Z/
Northern Trinity-
222 AM PST Fri Mar 10 2023

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST THIS
MORNING ABOVE 2500 FEET...

* WHAT...Heavy snow above 2500 feet. Additional snow accumulations
  of 3 inches. Winds gusting as high as 40 mph.

* WHERE...Northern Trinity County.

* WHEN...Until 10 AM PST this morning.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the morning commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

The latest road conditions for the state of California can be
obtained by calling 1-800-GAS-ROAD.

&&

$$

CAZ108-101800-
/O.CON.KEKA.WS.W.0011.000000T0000Z-230310T1800Z/
Southern Trinity-
222 AM PST Fri Mar 10 2023

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST THIS
MORNING ABOVE 2500 FEET...

* WHAT...Heavy snow above 2500 feet. Additional snow 
  accumulations of up to 3 inches. Winds gusting as high as 45 
  mph.

* WHERE...Southern Trinity County.

* WHEN...Until 10 AM PST this morning.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the morning commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

The latest road conditions for the state of California can be
obtained by calling 1-800-GAS-ROAD.

&&

$$

CAZ102-105-106-101800-
/O.CON.KEKA.WW.Y.0018.000000T0000Z-230310T1800Z/
Del Norte Interior-Northern Humboldt Interior-
Southern Humboldt Interior-
222 AM PST Fri Mar 10 2023

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THIS
MORNING ABOVE 2500 FEET...

* WHAT...Snow above 2500 feet. Additional snow accumulations of 2 
  to 7 inches. Winds gusting as high as 40 mph.

* WHERE...Del Norte Interior, Northern Humboldt Interior and 
  Southern Humboldt Interior Counties.

* WHEN...Until 10 AM PST this morning.

* IMPACTS...Travel could be very difficult. The hazardous 
  conditions could impact the morning commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state of California can be
obtained by calling 1-800-GAS-ROAD.

&&

$$
862 
WWUS46 KEKA 101207
WSWEKA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Eureka CA
407 AM PST Fri Mar 10 2023

CAZ107-101800-
/O.CON.KEKA.WS.W.0010.000000T0000Z-230310T1800Z/
Northern Trinity-
407 AM PST Fri Mar 10 2023

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST THIS
MORNING ABOVE 2500 FEET...

* WHAT...Heavy snow above 2500 feet. Additional snow 
  accumulations of up to 3 inches. Winds gusting as high as 40 
  mph.

* WHERE...Northern Trinity County.

* WHEN...Until 10 AM PST this morning.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the morning commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

The latest road conditions for the state of California can be
obtained by calling 1-800-GAS-ROAD.

&&

$$

CAZ108-101800-
/O.CON.KEKA.WS.W.0011.000000T0000Z-230310T1800Z/
Southern Trinity-
407 AM PST Fri Mar 10 2023

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST THIS
MORNING ABOVE 2500 FEET...

* WHAT...Heavy snow above 2500 feet. Additional snow 
  accumulations of up to two inches. Winds gusting as high as 45 
  mph.

* WHERE...Southern Trinity County.

* WHEN...Until 10 AM PST this morning.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the morning commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

The latest road conditions for the state of California can be
obtained by calling 1-800-GAS-ROAD.

&&

$$

CAZ102-105-102015-
/O.EXT.KEKA.WW.Y.0018.000000T0000Z-230311T0000Z/
Del Norte Interior-Northern Humboldt Interior-
407 AM PST Fri Mar 10 2023

...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 4 PM PST THIS
AFTERNOON ABOVE 2500 FEET...

* WHAT...Snow above 2500 feet. Additional snow accumulations of up
  to 6 inches. Winds gusting as high as 45 mph.

* WHERE...Del Norte Interior and Northern Humboldt Interior 
  Counties.

* WHEN...Until 4 PM PST this afternoon.

* IMPACTS...Travel could be very difficult to impossible. The 
  hazardous conditions could impact the morning commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state of California can be
obtained by calling 1-800-GAS-ROAD.

&&

$$

CAZ106-101800-
/O.CON.KEKA.WW.Y.0018.000000T0000Z-230310T1800Z/
Southern Humboldt Interior-
407 AM PST Fri Mar 10 2023

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THIS
MORNING ABOVE 2500 FEET...

* WHAT...Snow above 2500 feet. Additional snow accumulations of 
  up to 3 inches. Winds gusting as high as 35 mph.

* WHERE...Southern Humboldt Interior County.

* WHEN...Until 10 AM PST this morning.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the morning commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state of California can be
obtained by calling 1-800-GAS-ROAD.

&&

$$
065 
WWUS46 KEKA 101753
WSWEKA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Eureka CA
953 AM PST Fri Mar 10 2023

CAZ107-101900-
/O.EXP.KEKA.WS.W.0010.000000T0000Z-230310T1800Z/
Northern Trinity-
953 AM PST Fri Mar 10 2023

...WINTER STORM WARNING WILL EXPIRE AT 10 AM PST THIS MORNING
ABOVE 2500 FEET...

$$

CAZ108-101900-
/O.EXP.KEKA.WS.W.0011.000000T0000Z-230310T1800Z/
Southern Trinity-
953 AM PST Fri Mar 10 2023

...WINTER STORM WARNING WILL EXPIRE AT 10 AM PST THIS MORNING
ABOVE 2500 FEET...


$$

CAZ106-101900-
/O.EXP.KEKA.WW.Y.0018.000000T0000Z-230310T1800Z/
Southern Humboldt Interior-
953 AM PST Fri Mar 10 2023

...WINTER WEATHER ADVISORY WILL EXPIRE AT 10 AM PST THIS MORNING
ABOVE 2500 FEET...


$$

CAZ102-105-110000-
/O.CON.KEKA.WW.Y.0018.000000T0000Z-230311T0000Z/
Del Norte Interior-Northern Humboldt Interior-
953 AM PST Fri Mar 10 2023

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST THIS
AFTERNOON ABOVE 2500 FEET...

* WHAT...Snow above 2500 feet. Additional snow accumulations of up
  to 4 inches. 

* WHERE...Del Norte Interior and Northern Humboldt Interior 
  Counties.

* WHEN...Until 4 PM PST this afternoon.

* IMPACTS...Travel could be very difficult.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state of California can be
obtained by calling 1-800-GAS-ROAD.

&&

$$

What forecasters said that day

The local office's own words before this winter storm 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 winter storm warning went out at Mar 8, 5:03 AM PST, 9 hours 6 minutes earlier.

Area forecast discussion, Mar 8, 5:03 AM PST, 9 hours 6 minutes before
AREA FORECAST DISCUSSION
National Weather Service Eureka CA
503 AM PST Wed Mar 8 2023

.SYNOPSIS...Unseasonably cold weather conditions will continue today,
but rain and snow showers will diminish across much of the area.
An atmospheric river storm will bring heavy rain, rising snow
levels and strong winds on Thursday. The heaviest rain is forecast
to occur Thursday night and early Friday morning. Rain intensity
and amounts will fall off through the day on Friday. Additional
light rain is forecast to occur over the weekend, followed by
another period of heavier rain and gusty winds early next week.

&&

.DISCUSSION...Isolated to scattered showers continued to move
onshore and across the area early this morning. Snowfall rates
have fallen since yesterday evening and during the night. Another
inch or two above will be possible above 1500-2000 feet early
this morning across the mountain passes and the winter storm
warnings have been downgraded to winter weather advisories. Also,
some light snow or slush will be possible along the coast, down to
mean sea level. No or very minuscule accumulation is expected.

We are going to see quite the change in weather on Thursday as
a cold trough from the north interacts with moist subtropical
air stream. Forecast models and ensemble guidance remain
consistent with surface low developing offshore on Thursday. A
coastal barrier jet is forecast to develop in advance of the
front. High resolution models and BUFKIT profiles indicates
925mb winds (1500-2000 feet MSL) hitting 50-60kt. This will be
a good set up for strong winds over 50 mph along the coast and 60
mph or more for the higher elevations of Humboldt, Del Norte and
NW Mendocino counties. A wind advisory has been issued, however an
upgrade to a high wind warning may be necessary if winds reach or
exceed 70 mph.

Snow level with over-running precipitation will initially be
low, around 1000-2000 feet Thu morning. Only light amounts are
expected, an inch or less. Strong warm advection will pump up snow
levels in the afternoon to 3000 feet or more. Portion of Trinty
County typically remain colder and with upslope cooling, heavy
snow may once again pile up for elevations near or above 3000 feet
when the heavier precipitation rates arrive Thu afternoon and
evening. Eventually snow levels will creep above 4000 feet or more
Thursday night and all of the lower elevation passes (even on
highway 36 over South Fork Mountain Summit) will be all rain
except for Scott Mountain Pass.

This atmospheric river storm will also bring a threat for
flooding of small streams, creeks and low-lying areas with poor
drainage in Mendocino and Lake counties with heavy rainfall rates
Thursday night into early Friday. An areal flood watch has been
issued. Rainfall totals look to be around 2 to 4 inches for the 24
hours. The heavy rain will bring a ramp up in flows (CFS) on all
main stem rivers by Friday. Snow melt may increase the runoff.

Friday night through the weekend zonal flow is expected to bring
periods of light rain and high elevation snow. Snow levels will
drop some, but only to around 2,500 to 3,500 feet. These will rise
over the weekend to over 6,000 feet in the afternoon.

Another atmospheric river storm will impact the area early next
week, Monday into Tuesday. Heavy rainfall and flooding will be
possible.

&&

.AVIATION...(12Z WED to 12Z THUR) Light showers are continuing to
move in from the west. Occasional MVFR ceilings are occurring
with the showers, but gradual lifting is occurring. VFR conditions
will become widespread today as showers dissipate. An approaching
area of low pressure will bring low level windshear overnight
with S winds up to 35 kt at 2000ft AGL. LLWS will further increase
to quite high values through much of Thursday.

&&

.MARINE...A strong low pressure area will begin moving south along
the Pacific NW coast today. Southerly winds will begin ramping up in
response throughout the day, and will continue strengthening through
Thursday. Advisory level winds will quickly spread through the
waters this afternoon. Storm strength gusts can be expected by
Thursday morning and will peak Thursday afternoon with gusts up to
55 kts. This timing is earlier than previous guidance projected, as
this low continues to trend with a faster arrival. Shifted the
advisories earlier, and launched a Storm Warning for the outer
zones, and a Gale Warning for the inners. Storm strength gusts will
get into portions of the inners, especially around and south of Cape
Mendocino. For now, the Southern Inner zone was left as a gale, but
this zone should be monitored close to see if confidence grows in
coverage of Storm strength closer to the coast.

&&

.EKA WATCHES/WARNINGS/ADVISORIES...
CA...
     Wind Advisory from 11 AM to 9 PM PST Thursday for CAZ101-
     103-109-112.

     Winter Weather Advisory until 10 AM PST this morning for
     CAZ102-105>108-111-114.

     Wind Advisory from 6 AM to 9 PM PST Thursday for CAZ102-
     104>106-110.

     Winter Storm Watch from Thursday morning through Friday
     evening for CAZ107.

     Winter Storm Watch from Thursday morning through Thursday
     evening for CAZ108.

     Flood Watch from Thursday afternoon through Friday evening
     for CAZ109>115.

NORTHWEST CALIFORNIA COASTAL WATERS...
     Small Craft Advisory from 3 PM this afternoon to 3 AM PST
     Thursday for PZZ450.

     Gale Warning from 3 AM Thursday to 7 AM PST Friday for
     PZZ450-455.

     Small Craft Advisory from 9 PM this evening to 3 AM PST
     Thursday for PZZ455-475.

     Small Craft Advisory from 3 PM this afternoon to 1 AM PST
     Thursday for PZZ470.

     Storm Warning from 1 AM to 10 PM PST Thursday for PZZ470.

     Storm Warning from 3 AM to 10 PM PST Thursday for PZZ475.

&&

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, Mar 8, 3:39 AM PST, 10 hours 30 minutes before
Hazardous Weather Outlook
National Weather Service Eureka CA
339 AM PST Wed Mar 8 2023

CAZ109-112-091145-
Mendocino Coast-Southwestern Mendocino Interior-
339 AM PST Wed Mar 8 2023

...WIND ADVISORY IN EFFECT FROM 11 AM TO 9 PM PST THURSDAY...
...FLOOD WATCH IN EFFECT FROM THURSDAY AFTERNOON THROUGH FRIDAY
EVENING...

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...Thursday through Tuesday.

A Wind Advisory is currently in effect.
A Flood Watch is currently in effect.

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

CAZ101-103-091145-
Coastal Del Norte-Northern Humboldt Coast-
339 AM PST Wed Mar 8 2023

...WIND ADVISORY IN EFFECT FROM 11 AM TO 9 PM PST THURSDAY...

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...Thursday through Tuesday.

A Wind Advisory is currently in effect.

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

CAZ113-115-091145-
Southeastern Mendocino Interior-Southern Lake-
339 AM PST Wed Mar 8 2023

...FLOOD WATCH IN EFFECT FROM THURSDAY AFTERNOON THROUGH FRIDAY
EVENING...

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...Thursday through Tuesday.

A Flood Watch is currently in effect.

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

CAZ102-105-106-091145-
Del Norte Interior-Northern Humboldt Interior-
Southern Humboldt Interior-
339 AM PST Wed Mar 8 2023

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 10 AM PST THIS MORNING...
...WIND ADVISORY IN EFFECT FROM 6 AM TO 9 PM PST THURSDAY...

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...Thursday through Tuesday.

A Wind Advisory is currently in effect.

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

CAZ110-091145-
Northwestern Mendocino Interior-
339 AM PST Wed Mar 8 2023

...WIND ADVISORY IN EFFECT FROM 6 AM TO 9 PM PST THURSDAY...
...FLOOD WATCH IN EFFECT FROM THURSDAY AFTERNOON THROUGH FRIDAY
EVENING...

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...Thursday through Tuesday.

A Wind Advisory is currently in effect.
A Flood Watch is currently in effect.

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

CAZ111-114-091145-
Northeastern Mendocino Interior-Northern Lake-
339 AM PST Wed Mar 8 2023

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 10 AM PST THIS MORNING...
...FLOOD WATCH IN EFFECT FROM THURSDAY AFTERNOON THROUGH FRIDAY
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...Thursday through Tuesday.

A Flood Watch is currently in effect.

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

CAZ104-091145-
Southwestern Humboldt-
339 AM PST Wed Mar 8 2023

...WIND ADVISORY IN EFFECT FROM 6 AM TO 9 PM PST THURSDAY...

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...Thursday through Tuesday.

A Wind Advisory is currently in effect.

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

CAZ107-091145-
Northern Trinity-
339 AM PST Wed Mar 8 2023

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 10 AM PST THIS MORNING...
...WINTER STORM WATCH IN EFFECT FROM THURSDAY MORNING THROUGH FRIDAY
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...Thursday through Tuesday.

A Winter Storm Watch is currently in effect.

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

CAZ108-091145-
Southern Trinity-
339 AM PST Wed Mar 8 2023

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 10 AM PST THIS MORNING...
...WINTER STORM WATCH IN EFFECT FROM THURSDAY MORNING THROUGH
THURSDAY 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...Thursday through Tuesday.

A Winter Storm Watch is currently in effect.

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

In the hours before

Local storm report, Mar 8, 10:00 AM PST, 4 hours 9 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EUREKA CA
1000 AM PST WED MAR 8 2023

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

0907 AM     SNOW             4 ESE FT DICK           41.86N 124.08W
03/08/2023  E3.0 INCH        DEL NORTE          CA   PUBLIC

            REPORT FROM SOCIAL MEDIA AND LOCATION IS
            ESTIMATED. AT 1547’ ELEVATION ABOVE HIOUCHI
            OFF LOW DIVIDE RD. SNOWING AT THE TIME OF
            REPORT. 3 INCH ACCUMULATION SINCE LAST
            NIGHT.

&&

JLW
Local storm report, Mar 8, 10:12 AM PST, 3 hours 57 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EUREKA CA
1012 AM PST WED MAR 8 2023

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

0730 AM     SNOW             9 NW DOS RIOS           39.81N 123.48W
03/08/2023  M72.0 INCH       MENDOCINO          CA   TRAINED SPOTTER

            CLEAR AND 28 DEGREES WHEN REPORTED. 6 FEET
            OF SNOW ON THE GROUND.

&&

JLW
Local storm report, Mar 8, 10:18 AM PST, 3 hours 51 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EUREKA CA
1018 AM PST WED MAR 8 2023

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

0730 AM     SNOW             4 WSW DINSMORE          40.47N 123.67W
03/08/2023  M6.0 INCH        HUMBOLDT           CA   TRAINED SPOTTER

            6 INCHES OF FRESH SNOW OVERNIGHT. STATION
            ELEVATION: 2625 FT.

&&

JLW
Local storm report, Mar 8, 1:21 PM PST, 48 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EUREKA CA
121 PM PST WED MAR 8 2023

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

0600 AM     SNOW             2 WNW RUTH              40.29N 123.44W
03/08/2023  M18.0 INCH       TRINITY            CA   TRAINED SPOTTER

            18 INCHES OF FRESH SNOW OVERNIGHT. 40 INCHES OF SNOW ON
            THE GROUND.

&&

JLW

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 7, 8:55 PM PSTGale WarningEKA48 hr
Mar 7, 8:55 PM PSTSmall Craft AdvisoryEKA33 hr
Mar 8, 3:06 AM PSTSmall Craft AdvisoryEKA27 hr
Mar 8, 3:06 AM PSTStorm WarningEKA42 hr
Mar 8, 3:21 AM PSTWind AdvisoryEKADel Norte, Humboldt, Lake, Mendocino, Trinity43 hr
Mar 8, 2:09 PM PSTWinter Storm WatchEKADel Norte, Humboldt7 hr
Mar 8, 2:52 PM PSTRiver Flood WatchEKAMendocino18 hr

Nearby

Winter Storm Warnings in California, 2023Every winter storm warning in 2023

Sources

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