Alert archive / California / Winter Storm Watches in 2021

Winter Storm Watch 6, NWS Eureka, CA

December 9, 2021Humboldt County, Trinity County, California

NWS Eureka, CA issued this winter storm watch at Dec 9, 2021, 2:13 PM PST for Humboldt County, Trinity County, California. It took effect at Dec 12, 2021, 10:00 PM PST. It was in force for .

The area

The counties it named.

The facts

Issued
Dec 9, 2021, 2:13 PM PST (22:13 UTC)
In effect from
Dec 12, 2021, 10:00 PM PST
Expired
Dec 12, 2021, 5:17 AM PST
In force
Issued by
NWS Eureka, CA

Counties Humboldt County, CA, Trinity County, CA

The radar

The Eureka (Bunker Hill) radar (KBHX), 69 km from the middle of the area, began a volume at 22:15 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

Medford/Jackson, OR (KMFR), launched 12:00Z, 10.2 hours before the alert went out and 197 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 2021-12-09Temperature 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°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Medford/Jackson, OR at 12:00Z on 2021-12-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 27 square meters per square second.19395878Sfc1 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
846 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
27 m²/s²
0-3 km storm-relative helicity
77 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

207 
WWUS46 KEKA 092213
WSWEKA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Eureka CA
213 PM PST Thu Dec 9 2021

CAZ107-100615-
/O.NEW.KEKA.WS.A.0006.211211T2200Z-211212T2300Z/
Northern Trinity-
213 PM PST Thu Dec 9 2021

...WINTER STORM WATCH IN EFFECT FROM SATURDAY AFTERNOON THROUGH
SUNDAY AFTERNOON ABOVE 3000 FEET...

* WHAT...Heavy snow possible above 3000 feet. Total snow
  accumulations of 6 to 12 inches possible. Higher amounts over
  5,000 feet.

* WHERE...Northern Trinity County including Highway 3 north of
  Weaverville and Highway 299 at Buckhorn Summit.

* WHEN...From Saturday afternoon through Sunday afternoon.

* IMPACTS...Travel could be very difficult to impossible.

* ADDITIONAL DETAILS...Additional snow is expected Monday through
  Tuesday morning. Confidence is low on the snow levels.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation. 

&&

$$
12 follow-up statements
843 
WWUS46 KEKA 100430
WSWEKA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Eureka CA
830 PM PST Thu Dec 9 2021

CAZ108-101230-
/O.EXB.KEKA.WS.A.0006.211211T1800Z-211213T1800Z/
Southern Trinity-
830 PM PST Thu Dec 9 2021

...WINTER STORM WATCH IN EFFECT FROM SATURDAY MORNING THROUGH
MONDAY MORNING ABOVE 3000 FEET...

* WHAT...Heavy wet snow possible above 3000 feet. Total snow
  accumulations of 7 to 12 inches possible, with higher amounts
  likely across taller mountains and ridges.

* WHERE...Southern Trinity County.

* WHEN...From Saturday morning through Monday morning.

* IMPACTS...Travel could be very difficult to impossible along
  portions of highway 36. The hazardous conditions could impact 
  the morning commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation. 

&&

$$

CAZ107-101230-
/O.EXT.KEKA.WS.A.0006.211211T1800Z-211213T1800Z/
Northern Trinity-
830 PM PST Thu Dec 9 2021

...WINTER STORM WATCH NOW IN EFFECT FROM SATURDAY MORNING THROUGH
MONDAY MORNING ABOVE 3000 FEET...

* WHAT...Heavy snow possible above 3000 feet. Total snow
  accumulations of 7 to 12 inches possible, with several feet
  of snow possible at Scott Mountain Summit.

* WHERE...Northern Trinity County.

* WHEN...From Saturday morning through Monday morning.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation. 

&&

$$
060 
WWUS46 KEKA 101236
WSWEKA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Eureka CA
436 AM PST Fri Dec 10 2021

...PERIODS OF HEAVY SNOW SATURDAY THROUGH MONDAY...

A cold front will approach on Saturday, with moist upslope flow
out of the Sacramento Valley aiding in precipitation development
and keeping snow levels locally lower in Trinity County than areas
farther south and west. Snow levels on Saturday and Saturday Night 
near and north of Highway 299 may be stubborn to rise above 2500 
or 3000 feet. This may allow for significant accumulations at
Buckhorn Summit and possibly Oregon Mountain Pass, as well as some
portions of Highway 36 above 4000 feet. A few feet of snow are 
likely at Scott Mountain Summit. There will likely be a lull in
precipitation with snow levels in the 3000 to 4000-foot range on
Sunday. Another round of heavy precipitation will arrive later
Sunday night into Monday, followed by falling snow levels as
precipitation gradually winds down later Monday and Monday Night. 


CAZ107-108-102045-
/O.CON.KEKA.WS.A.0006.211211T1800Z-211213T1800Z/
Northern Trinity-Southern Trinity-
436 AM PST Fri Dec 10 2021

...WINTER STORM WATCH REMAINS IN EFFECT FROM SATURDAY MORNING
THROUGH MONDAY MORNING ABOVE 3000 FEET...

* WHAT...Heavy snow possible above 3000 feet. Total snow
  accumulations of 7 to 12 inches possible, with several feet of
  snow possible at Scott Mountain Summit. Winds could gust as 
  high as 40 mph.

* WHERE...Southern Trinity and Northern Trinity Counties.

* WHEN...From Saturday morning through Monday morning.

* IMPACTS...Travel could be very difficult to impossible along
  portions of Highways 3, 36, and 299.
  

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation. 

&&

$$
786 
WWUS46 KEKA 102031
WSWEKA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Eureka CA
1231 PM PST Fri Dec 10 2021

...PERIODS OF HEAVY SNOW SATURDAY THROUGH MONDAY...

A cold front will approach on Saturday, with moist upslope flow
out of the Sacramento Valley aiding in precipitation development
and keeping snow levels locally lower in Trinity County than
areas farther south and west. Snow levels on Saturday and
Saturday Night near and north of Highway 299 may be stubborn to
rise above 2500 or 3000 feet. This may allow for significant
accumulations at Buckhorn Summit and possibly Oregon Mountain
Pass, as well as some portions of Highway 36 above 4000 feet. A
few feet of snow are likely at Scott Mountain Summit. There will
likely be a lull in precipitation with snow levels in the 3000 to
4000-foot range on Sunday. Another round of heavy precipitation
will arrive later Sunday night into Monday, followed by falling
snow levels as precipitation gradually winds down later Monday
and Monday Night.

CAZ107-108-110445-
/O.CON.KEKA.WS.A.0006.211211T1800Z-211213T1800Z/
Northern Trinity-Southern Trinity-
1231 PM PST Fri Dec 10 2021

...WINTER STORM WATCH REMAINS IN EFFECT FROM SATURDAY MORNING
THROUGH MONDAY MORNING ABOVE 3000 FEET...

* WHAT...Heavy snow possible above 3000 feet. Total snow 
  accumulations of 7 to 12 inches possible, with several feet of 
  snow possible at Scott Mountain Summit. Winds could gust as 
  high as 40 mph.

* WHERE...Southern Trinity and Northern Trinity Counties.

* WHEN...From Saturday morning through Monday morning.

* IMPACTS...Travel could be very difficult to impossible along 
  portions of Highways 3, 36, and 299.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation. 

&&

$$
822 
WWUS46 KEKA 102154
WSWEKA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Eureka CA
154 PM PST Fri Dec 10 2021

...PERIODS OF HEAVY SNOW SATURDAY THROUGH MONDAY...

A cold front will approach on Saturday. Snow levels on Saturday 
and Saturday Night near and north of Highway 299 may be stubborn 
to rise above 2500 or 3000 feet. This may allow for significant 
accumulations at Buckhorn Summit and possibly Oregon Mountain 
Pass, as well as some portions of Highway 36 above 4000 feet. A 
few feet of snow are likely at Scott Mountain Summit. There will 
likely be a lull in precipitation with snow levels in the 3000 to 
4000-foot range on Sunday. Another round of heavy precipitation 
will arrive later Sunday night into Monday, followed by falling 
snow levels as precipitation gradually winds down later Monday and
Monday Night.

CAZ107-110600-
/O.NEW.KEKA.WS.W.0006.211211T2300Z-211212T1400Z/
/O.EXT.KEKA.WS.A.0006.211213T0700Z-211214T0600Z/
Northern Trinity-
154 PM PST Fri Dec 10 2021

...WINTER STORM WARNING IN EFFECT FROM 3 PM SATURDAY TO 6 AM PST
SUNDAY ABOVE 3000 FEET...
...WINTER STORM WATCH NOW IN EFFECT FROM SUNDAY EVENING THROUGH
MONDAY EVENING ABOVE 3500 FEET...

* WHAT...For the Winter Storm Warning above 3000 feet, heavy snow
  expected. Total snow accumulations of 7 to 12 inches with 2 feet
  possible at the higher elevations. Winds gusting as high as 40
  mph. For the Winter Storm Watch above 3500 feet, heavy snow
  possible. Total snow accumulations of 8 to 12 inches possible.

* WHERE...Northern Trinity County. This includes Buckhorn Summit
  on Hwy 299 and many areas on Hwy 3 north of Weaverville.

* WHEN...For the Winter Storm Warning, from 3 PM Saturday to 6 
  AM PST Sunday. For the Winter Storm Watch, from Sunday evening 
  through Monday evening.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Monitor the latest forecasts for updates on this situation. 

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

&&

$$

CAZ108-110600-
/O.NEW.KEKA.WS.W.0006.211211T2300Z-211212T1400Z/
/O.EXT.KEKA.WS.A.0006.211213T0700Z-211214T0600Z/
Southern Trinity-
154 PM PST Fri Dec 10 2021

...WINTER STORM WARNING IN EFFECT FROM 3 PM SATURDAY TO 6 AM PST
SUNDAY ABOVE 3500 FEET...
...WINTER STORM WATCH NOW IN EFFECT FROM SUNDAY EVENING THROUGH
MONDAY EVENING ABOVE 3500 FEET...

* WHAT...For the Winter Storm Warning above 3500 feet, heavy wet
  snow expected. Total snow accumulations of 7 to 12 inches. Winds
  gusting as high as 35 mph. For the Winter Storm Watch above 3500
  feet, heavy snow possible. Total snow accumulations of 6 to 14 
  inches possible.

* WHERE...Southern Trinity County above 3,500 feet. This will
  impact areas of Highway 36 east of Mad River and the higher
  summits on Highway 3. 

* WHEN...For the Winter Storm Warning, from 3 PM Saturday to 6 
  AM PST Sunday. For the Winter Storm Watch, from Sunday evening 
  through Monday evening.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Monitor the latest forecasts for updates on this situation. 

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

&&

$$
240 
WWUS46 KEKA 110013
WSWEKA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Eureka CA
413 PM PST Fri Dec 10 2021

...PERIODS OF HEAVY SNOW SATURDAY THROUGH TUESDAY...

A cold front will approach on Saturday. Snow levels on Saturday
and Saturday Night near and north of Highway 299 will initially
range from 2500 to 3500 feet. This will support significant 
snow accumulations at Buckhorn Summit, Oregon Mountain Pass, as 
well as some portions of Highway 36 above 2500 feet. A few feet 
of snow are likely at Scott Mountain Summit. There will likely be 
a lull in precipitation with snow levels in the 3000 to 4000 foot
range on Sunday. Another round of heavy precipitation will arrive
later Sunday night into Monday, followed by falling snow levels
that will aid in additional heavy snow for elevations above 3500
feet in Trinity County and 2500 feet in eastern Humboldt County.

CAZ107-110815-
/O.EXT.KEKA.WS.W.0006.211211T1800Z-211212T1400Z/
/O.EXT.KEKA.WS.A.0006.211213T0600Z-211214T1200Z/
Northern Trinity-
413 PM PST Fri Dec 10 2021

...WINTER STORM WARNING NOW IN EFFECT FROM 10 AM SATURDAY TO 6 AM
PST SUNDAY ABOVE 2500 FEET...
...WINTER STORM WATCH NOW IN EFFECT FROM SUNDAY EVENING THROUGH
LATE MONDAY NIGHT ABOVE 3500 FEET...

* WHAT...For the Winter Storm Warning above 2500 feet, heavy snow
  expected. Total snow accumulations ranging from 7 to 27 inches.
  Winds gusting as high as 40 mph. For the Winter Storm Watch
  above 3500 feet, heavy snow possible. Total snow accumulations
  of 7 to 32 inches possible.

* WHERE...Northern Trinity County.

* WHEN...For the Winter Storm Warning, from 10 AM Saturday to 6 
  AM PST Sunday. For the Winter Storm Watch, from Sunday evening 
  through late Monday night.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Monitor the latest forecasts for updates on this situation. 

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

&&

$$

CAZ108-110815-
/O.EXT.KEKA.WS.W.0006.211211T1800Z-211212T1400Z/
/O.EXT.KEKA.WS.A.0006.211213T0600Z-211214T1200Z/
Southern Trinity-
413 PM PST Fri Dec 10 2021

...WINTER STORM WARNING NOW IN EFFECT FROM 10 AM SATURDAY TO 6 AM
PST SUNDAY ABOVE 3500 FEET...
...WINTER STORM WATCH NOW IN EFFECT FROM SUNDAY EVENING THROUGH
LATE MONDAY NIGHT ABOVE 3500 FEET...

* WHAT...For the Winter Storm Warning above 3500 feet, heavy snow
  expected. Total snow accumulations of 7 to 17 inches. Winds 
  gusting as high as 35 mph. For the Winter Storm Watch above 3500
  feet, heavy snow possible. Total snow accumulations of 7 to 33 
  inches possible.

* WHERE...Southern Trinity County.

* WHEN...For the Winter Storm Warning, from 10 AM Saturday to 6 
  AM PST Sunday. For the Winter Storm Watch, from Sunday evening 
  through late Monday night.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Monitor the latest forecasts for updates on this situation. 

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

&&

$$

CAZ105-106-110815-
/O.EXB.KEKA.WS.A.0006.211213T0600Z-211214T1200Z/
Northern Humboldt Interior-Southern Humboldt Interior-
413 PM PST Fri Dec 10 2021

...WINTER STORM WATCH IN EFFECT FROM SUNDAY EVENING THROUGH LATE
MONDAY NIGHT ABOVE 2500 FEET...

* WHAT...Heavy snow possible above 2500 feet. Total snow 
  accumulations of 7 to 33 inches possible. Winds could gust as 
  high as 35 mph.

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

* WHEN...From Sunday evening through late Monday night.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation. 

&&

$$
556 
WWUS46 KEKA 110559
WSWEKA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Eureka CA
959 PM PST Fri Dec 10 2021

...PERIODS OF HEAVY SNOW SATURDAY THROUGH TUESDAY...

A cold front will approach on Saturday. Snow levels on Saturday
and Saturday Night near and north of Highway 299 will initially
range from 2500 to 3500 feet. This will support significant snow
accumulations at Buckhorn Summit, Oregon Mountain Pass, as well
as portions of Highway 36. A few feet of snow are likely at Scott
Mountain Summit. There will be a relative lull in precipitation 
with snow levels in the 3000 to 4000 foot range on Sunday. Another
round of heavy precipitation will arrive later Sunday night into 
Monday, followed by falling snow levels that will aid in 
additional heavy snow for elevations above 3500 feet in Trinity 
County and 2500 feet in eastern Humboldt and Del Norte County.

CAZ107-111400-
/O.CON.KEKA.WS.W.0006.211211T1800Z-211212T1400Z/
/O.CON.KEKA.WS.A.0006.211213T0600Z-211214T1200Z/
Northern Trinity-
959 PM PST Fri Dec 10 2021

...WINTER STORM WARNING REMAINS IN EFFECT FROM 10 AM SATURDAY TO
6 AM PST SUNDAY ABOVE 2500 FEET...
...WINTER STORM WATCH REMAINS IN EFFECT FROM SUNDAY EVENING
THROUGH LATE MONDAY NIGHT ABOVE 3500 FEET...

* WHAT...For the Winter Storm Warning above 2500 feet, heavy 
  snow expected. Total snow accumulations of up to 27 inches. 
  Winds gusting as high as 40 mph. For the Winter Storm Watch 
  above 3500 feet, heavy snow possible. Total snow accumulations 
  of 13 to 32 inches possible.

* WHERE...Northern Trinity County.

* WHEN...For the Winter Storm Warning, from 10 AM Saturday to 6 
  AM PST Sunday. For the Winter Storm Watch, from Sunday evening 
  through late Monday night.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Monitor the latest forecasts for updates on this situation. 

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

&&

$$

CAZ108-111400-
/O.CON.KEKA.WS.W.0006.211211T1800Z-211212T1400Z/
/O.CON.KEKA.WS.A.0006.211213T0600Z-211214T1200Z/
Southern Trinity-
959 PM PST Fri Dec 10 2021

...WINTER STORM WARNING REMAINS IN EFFECT FROM 10 AM SATURDAY TO
6 AM PST SUNDAY ABOVE 3500 FEET...
...WINTER STORM WATCH REMAINS IN EFFECT FROM SUNDAY EVENING
THROUGH LATE MONDAY NIGHT ABOVE 3500 FEET...

* WHAT...For the Winter Storm Warning above 3500 feet, heavy 
  snow expected. Total snow accumulations of up to 17 inches. 
  Winds gusting as high as 35 mph. For the Winter Storm Watch 
  above 3500 feet, heavy snow possible. Total snow accumulations 
  of 7 to 33 inches possible.

* WHERE...Southern Trinity County.

* WHEN...For the Winter Storm Warning, from 10 AM Saturday to 6 
  AM PST Sunday. For the Winter Storm Watch, from Sunday evening 
  through late Monday night.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Monitor the latest forecasts for updates on this situation. 

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

&&

$$

CAZ105-106-111400-
/O.CON.KEKA.WS.A.0006.211213T0600Z-211214T1200Z/
Northern Humboldt Interior-Southern Humboldt Interior-
959 PM PST Fri Dec 10 2021

...WINTER STORM WATCH REMAINS IN EFFECT FROM SUNDAY EVENING
THROUGH LATE MONDAY NIGHT ABOVE 2500 FEET...

* WHAT...Heavy snow possible above 2500 feet. Total snow
  accumulations of 7 to 12 inches, with locally higher amounts 
  possible. Winds could gust as high as 35 mph.

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

* WHEN...From Sunday evening through late Monday night.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation. 

&&

$$
747 
WWUS46 KEKA 111255
WSWEKA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Eureka CA
455 AM PST Sat Dec 11 2021

...PERIODS OF HEAVY MOUNTAIN SNOW THIS AFTERNOON THROUGH 
MONDAY...

A cold front will approach today. Snow levels near and north of 
Highway 299 will initially range from 2500 to 3500 feet. This will
support at least several inches of snow accumulations near 
Buckhorn Summit, Oregon Mountain Pass, as well as portions of 
Highway 36. A foot or two of snow is likely at Scott Mountain 
Summit. There will be a relative lull in precipitation Sunday into
Sunday night, with snow levels in the 3000 to 4000 foot range.
Another round of heavy precipitation will arrive late Sunday 
night into Monday, followed by falling snow levels that will aid 
in additional heavy snow for elevations above 3500 feet in Trinity
County and 2500 feet in eastern Humboldt and Del Norte County.
There remains some uncertainty regarding the timing of
precipitation tapering off late Monday as snow levels lower, which
will determine if passes see just some slushy roadside
accumulations or heavy snowfall. 


CAZ107-112100-
/O.CON.KEKA.WS.W.0006.211211T1800Z-211212T1400Z/
/O.CON.KEKA.WS.A.0006.211213T0600Z-211214T1200Z/
Northern Trinity-
455 AM PST Sat Dec 11 2021

...WINTER STORM WARNING REMAINS IN EFFECT FROM 10 AM THIS MORNING
TO 6 AM PST SUNDAY ABOVE 2500 FEET...
...WINTER STORM WATCH REMAINS IN EFFECT FROM SUNDAY EVENING
THROUGH LATE MONDAY NIGHT ABOVE 3500 FEET...

* WHAT...For the Winter Storm Warning above 2500 feet, heavy snow
  expected. Total snow accumulations of up to 24 inches at Scott
  Mountain Summit. 4 to 8 inches of snow expected at Oregon
  Mountain and Buckhorn Summit. Winds gusting as high as 40 mph. 
  For the Winter Storm Watch above 3500 feet, heavy snow possible.
  Additional accumulations of 4 to 7 inches on Highway 299 
  passes, with up to 2 feet at Scott Mountain Summit.

* WHERE...Northern Trinity County.

* WHEN...For the Winter Storm Warning, from 10 AM this morning 
  to 6 AM PST Sunday. For the Winter Storm Watch, from Sunday 
  evening through late Monday night.

* IMPACTS...Travel could be very difficult to impossible along
  high elevation portions of Highways 3 and 299, with slippery, 
  snow- covered roads and poor visibility. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Monitor the latest forecasts for updates on this situation. 

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

&&

$$

CAZ108-112100-
/O.CON.KEKA.WS.W.0006.211211T1800Z-211212T1400Z/
/O.CON.KEKA.WS.A.0006.211213T0600Z-211214T1200Z/
Southern Trinity-
455 AM PST Sat Dec 11 2021

...WINTER STORM WARNING REMAINS IN EFFECT FROM 10 AM THIS MORNING
TO 6 AM PST SUNDAY ABOVE 3500 FEET...
...WINTER STORM WATCH REMAINS IN EFFECT FROM SUNDAY EVENING
THROUGH LATE MONDAY NIGHT ABOVE 3500 FEET...

* WHAT...For the Winter Storm Warning above 3500 feet, heavy wet
  snow expected. Total snow accumulations of 4 to 10 inches
  possible along higher elevation portions of highway 36 and
  highway 3. Winds gusting as high as 35 mph. For the Winter Storm
  Watch above 3500 feet, heavy snow possible with additional
  accumulations of 4 to 7 inches. 

* WHERE...Southern Trinity County.

* WHEN...For the Winter Storm Warning, from 10 AM this morning 
  to 6 AM PST Sunday. For the Winter Storm Watch, from Sunday 
  evening through late Monday night.

* IMPACTS...Travel could be very difficult to impossible along
  portions of highways 3 and 36, with slippery, snow- covered 
  roads and poor visibility. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Monitor the latest forecasts for updates on this situation. 

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

&&

$$

CAZ105-106-112100-
/O.CON.KEKA.WS.A.0006.211213T0600Z-211214T1200Z/
Northern Humboldt Interior-Southern Humboldt Interior-
455 AM PST Sat Dec 11 2021

...WINTER STORM WATCH REMAINS IN EFFECT FROM SUNDAY EVENING
THROUGH LATE MONDAY NIGHT ABOVE 2500 FEET...

* WHAT...Heavy snow possible above 2500 feet. Total snow
  accumulations of 4 to 12 inches possible, including at Berry
  Summit on Highway 299. Winds could gust as high as 35 mph.

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

* WHEN...From Sunday evening through late Monday night.

* IMPACTS...Travel could be very difficult to impossible at passes
  along Highway 299 and other high elevation rural roads, with slippery,
  snow- covered roads and poor visibility. 
 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation. 

&&

$$
805 
WWUS46 KEKA 112045
WSWEKA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Eureka CA
1245 PM PST Sat Dec 11 2021

...PERIODS OF HEAVY MOUNTAIN SNOW THIS AFTERNOON THROUGH MONDAY...

A cold front will approach today. Snow levels near and north of
Highway 299 will initially range from 2500 to 3500 feet. This
will support at least several inches of snow accumulations near
Buckhorn Summit, Oregon Mountain Pass, as well as portions of
Highway 36. A foot or two of snow is likely at Scott Mountain
Summit. There will be a relative lull in precipitation Sunday
into Sunday night, with snow levels in the 3000 to 4000 foot
range. Another round of heavy precipitation will arrive late
Sunday night into Monday, followed by falling snow levels that
will aid in additional heavy snow for elevations above 3500 feet
in Trinity County and 2500 feet in eastern Humboldt and Del Norte
County. There remains some uncertainty regarding the timing of
precipitation tapering off late Monday as snow levels lower,
which will determine if passes see just some slushy roadside
accumulations or heavy snowfall.

CAZ107-120445-
/O.CON.KEKA.WS.W.0006.000000T0000Z-211212T1400Z/
/O.CON.KEKA.WS.A.0006.211213T0600Z-211214T1200Z/
Northern Trinity-
1245 PM PST Sat Dec 11 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM PST SUNDAY
ABOVE 2500 FEET...
...WINTER STORM WATCH REMAINS IN EFFECT FROM SUNDAY EVENING
THROUGH LATE MONDAY NIGHT ABOVE 3500 FEET...

* WHAT...For the Winter Storm Warning above 2500 feet, heavy 
  snow expected. Total snow accumulations of up to 24 inches at 
  Scott Mountain Summit. 4 to 8 inches of snow expected at 
  Oregon Mountain and Buckhorn Summit. Winds gusting as high as 
  40 mph. For the Winter Storm Watch above 3500 feet, heavy snow 
  possible. Additional accumulations of 4 to 7 inches on Highway 
  299 passes, with up to 2 feet at Scott Mountain Summit.

* WHERE...Northern Trinity County.

* WHEN...For the Winter Storm Warning, from 10 AM this morning 
  to 6 AM PST Sunday. For the Winter Storm Watch, from Sunday 
  evening through late Monday night.

* IMPACTS...Travel could be very difficult to impossible along 
  high elevation portions of Highways 3 and 299, with slippery, 
  snow- covered roads and poor visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Monitor the latest forecasts for updates on this situation. 

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

&&

$$

CAZ108-120445-
/O.CON.KEKA.WS.W.0006.000000T0000Z-211212T1400Z/
/O.CON.KEKA.WS.A.0006.211213T0600Z-211214T1200Z/
Southern Trinity-
1245 PM PST Sat Dec 11 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM PST SUNDAY
ABOVE 3500 FEET...
...WINTER STORM WATCH REMAINS IN EFFECT FROM SUNDAY EVENING
THROUGH LATE MONDAY NIGHT ABOVE 3500 FEET...

* WHAT...For the Winter Storm Warning above 3500 feet, heavy wet 
  snow expected. Total snow accumulations of 4 to 10 inches 
  possible along higher elevation portions of highway 36 and 
  highway 3. Winds gusting as high as 35 mph. For the Winter 
  Storm Watch above 3500 feet, heavy snow possible with 
  additional accumulations of 4 to 7 inches.

* WHERE...Southern Trinity County.

* WHEN...For the Winter Storm Warning, from 10 AM this morning 
  to 6 AM PST Sunday. For the Winter Storm Watch, from Sunday 
  evening through late Monday night.

* IMPACTS...Travel could be very difficult to impossible along 
  portions of highways 3 and 36, with slippery, snow- covered 
  roads and poor visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Monitor the latest forecasts for updates on this situation. 

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

&&

$$

CAZ105-106-120445-
/O.CON.KEKA.WS.A.0006.211213T0600Z-211214T1200Z/
Northern Humboldt Interior-Southern Humboldt Interior-
1245 PM PST Sat Dec 11 2021

...WINTER STORM WATCH REMAINS IN EFFECT FROM SUNDAY EVENING
THROUGH LATE MONDAY NIGHT ABOVE 2500 FEET...

* WHAT...Heavy snow possible above 2500 feet. Total snow 
  accumulations of 4 to 12 inches possible, including at Berry 
  Summit on Highway 299. Winds could gust as high as 35 mph.

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

* WHEN...From Sunday evening through late Monday night.

* IMPACTS...Travel could be very difficult to impossible at 
  passes along Highway 299 and other high elevation rural roads, 
  with slippery, snow- covered roads and poor visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation. 

&&

$$
415 
WWUS46 KEKA 112233
WSWEKA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Eureka CA
233 PM PST Sat Dec 11 2021

...PERIODS OF HEAVY MOUNTAIN SNOW THIS AFTERNOON THROUGH MONDAY...

The cold front has start to move onshore this afternoon. Snow 
levels near and north of Highway 299 will initially range from 
2500 to 3500 feet. This will support at least several inches of 
snow accumulations near Buckhorn Summit, Oregon Mountain Pass, as 
well as portions of Highway 36. A foot or two of snow is likely at
Scott Mountain Summit. There will be a relative lull in 
precipitation Sunday into Sunday night, with snow levels in the 
3000 to 4000 foot range. Another round of heavy precipitation will
arrive late Sunday night into Monday, followed by falling snow 
levels that will aid in additional heavy snow for elevations above
3500 feet in Trinity County and 2500 feet in eastern Humboldt and
Del Norte County. There remains some uncertainty regarding the 
timing of precipitation tapering off late Monday as snow levels 
lower, which will determine if passes see just some slushy 
roadside accumulations or heavy snowfall.

CAZ107-120645-
/O.CON.KEKA.WS.W.0006.000000T0000Z-211212T1400Z/
/O.CON.KEKA.WS.A.0006.211213T0600Z-211214T1200Z/
Northern Trinity-
233 PM PST Sat Dec 11 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM PST SUNDAY
ABOVE 2500 FEET...
...WINTER STORM WATCH REMAINS IN EFFECT FROM SUNDAY EVENING
THROUGH LATE MONDAY NIGHT ABOVE 3500 FEET...

* WHAT...For the Winter Storm Warning above 2500 feet, heavy snow
  expected. Total snow accumulations of up to 24 inches at Scott
  Mountain Summit. 4 to 8 inches of snow expected at Oregon
  Mountain and Buckhorn Summit. Winds gusting as high as 40 mph.
  For the Winter Storm Watch above 3500 feet, heavy snow possible.
  Additional accumulations of a few possible on Highway 299 
  passes, with up to 2 feet at Scott Mountain Summit.

* WHERE...Northern Trinity County.

* WHEN...For the Winter Storm Warning, from 10 AM this morning 
  to 6 AM PST Sunday. For the Winter Storm Watch, from Sunday 
  evening through late Monday night.

* IMPACTS...Travel could be very difficult to impossible along 
  high elevation portions of Highways 3 and 299, with slippery, 
  snow- covered roads and poor visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Monitor the latest forecasts for updates on this situation. 

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

&&

$$

CAZ108-120645-
/O.CON.KEKA.WS.W.0006.000000T0000Z-211212T1400Z/
/O.CON.KEKA.WS.A.0006.211213T0600Z-211214T1200Z/
Southern Trinity-
233 PM PST Sat Dec 11 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM PST SUNDAY
ABOVE 3500 FEET...
...WINTER STORM WATCH REMAINS IN EFFECT FROM SUNDAY EVENING
THROUGH LATE MONDAY NIGHT ABOVE 3500 FEET...

* WHAT...For the Winter Storm Warning above 3500 feet, heavy wet 
  snow expected. Total snow accumulations of 4 to 10 inches 
  possible along higher elevation portions of highway 36 and 
  highway 3. Winds gusting as high as 35 mph. For the Winter 
  Storm Watch above 3500 feet, heavy snow possible with 
  additional accumulations of 4 to 7 inches.

* WHERE...Southern Trinity County.

* WHEN...For the Winter Storm Warning, from 10 AM this morning 
  to 6 AM PST Sunday. For the Winter Storm Watch, from Sunday 
  evening through late Monday night.

* IMPACTS...Travel could be very difficult to impossible along 
  portions of highways 3 and 36, with slippery, snow- covered 
  roads and poor visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Monitor the latest forecasts for updates on this situation. 

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

&&

$$

CAZ105-106-120645-
/O.CON.KEKA.WS.A.0006.211213T0600Z-211214T1200Z/
Northern Humboldt Interior-Southern Humboldt Interior-
233 PM PST Sat Dec 11 2021

...WINTER STORM WATCH REMAINS IN EFFECT FROM SUNDAY EVENING
THROUGH LATE MONDAY NIGHT ABOVE 2500 FEET...

* WHAT...Heavy snow possible above 2500 feet. Total snow
  accumulations of 4 to 8 inches possible, including at Berry 
  Summit on Highway 299. Winds could gust as high as 35 mph.

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

* WHEN...From Sunday evening through late Monday night.

* IMPACTS...Travel could be very difficult to impossible at 
  passes along Highway 299 and other high elevation rural roads, 
  with slippery, snow- covered roads and poor visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation. 

&&

$$
319 
WWUS46 KEKA 120141
WSWEKA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Eureka CA
541 PM PST Sat Dec 11 2021

...PERIODS OF HEAVY MOUNTAIN SNOW THIS AFTERNOON THROUGH MONDAY...

Snow levels near and north of Highway 299 will initially range 
from 2500 to 3500 feet this evening, and will support accumulating
snow at Buckhorn Summit, Oregon Mountain Pass, as well as 
portions of Highway 36. A foot or two of snow is likely at Scott 
Mountain Summit. There will be a relative lull in precipitation 
Sunday into Sunday night, with snow levels in the 3000 to 4000 
foot range. Another round of heavy precipitation will arrive late 
Sunday night into Monday, followed by falling snow levels that 
will aid in additional heavy snow for elevations above 3500 feet 
in Trinity County and 2500 feet in eastern Humboldt and Del Norte 
County.

CAZ107-120945-
/O.CON.KEKA.WS.W.0006.000000T0000Z-211212T1400Z/
/O.CON.KEKA.WS.A.0006.211213T0600Z-211214T1200Z/
Northern Trinity-
541 PM PST Sat Dec 11 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM PST SUNDAY
ABOVE 2500 FEET...
...WINTER STORM WATCH REMAINS IN EFFECT FROM SUNDAY EVENING
THROUGH LATE MONDAY NIGHT ABOVE 3500 FEET...

* WHAT...For the Winter Storm Warning above 2500 feet, heavy snow.
  Additional snow accumulations of 7 to 20 inches. For the Winter
  Storm Watch above 3500 feet, heavy snow possible. Total snow 
  accumulations of 9 to 24 inches possible.

* WHERE...Northern Trinity County.

* WHEN...For the Winter Storm Warning, until 6 AM PST Sunday. 
  For the Winter Storm Watch, from Sunday evening through late 
  Monday night.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Monitor the latest forecasts for updates on this situation. 

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

&&

$$

CAZ108-120945-
/O.CON.KEKA.WS.W.0006.000000T0000Z-211212T1400Z/
/O.CON.KEKA.WS.A.0006.211213T0600Z-211214T1200Z/
Southern Trinity-
541 PM PST Sat Dec 11 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM PST SUNDAY
ABOVE 3500 FEET...
...WINTER STORM WATCH REMAINS IN EFFECT FROM SUNDAY EVENING
THROUGH LATE MONDAY NIGHT ABOVE 3500 FEET...

* WHAT...For the Winter Storm Warning above 3500 feet, heavy wet
  snow. Additional snow accumulations of 5 to 15 inches. For the 
  Winter Storm Watch above 3500 feet, heavy snow possible. Total 
  snow accumulations of 7 to 24 inches possible.

* WHERE...Southern Trinity County.

* WHEN...For the Winter Storm Warning, until 6 AM PST Sunday. 
  For the Winter Storm Watch, from Sunday evening through late 
  Monday night.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Monitor the latest forecasts for updates on this situation. 

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

&&

$$

CAZ105-106-120945-
/O.CON.KEKA.WS.A.0006.211213T0600Z-211214T1200Z/
Northern Humboldt Interior-Southern Humboldt Interior-
541 PM PST Sat Dec 11 2021

...WINTER STORM WATCH REMAINS IN EFFECT FROM SUNDAY EVENING
THROUGH LATE MONDAY NIGHT ABOVE 2500 FEET...

* WHAT...Heavy snow possible above 2500 feet. Total snow 
  accumulations of 7 to 24 inches possible.

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

* WHEN...From Sunday evening through late Monday night.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation. 

&&

$$
750 
WWUS46 KEKA 120937
WSWEKA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Eureka CA
137 AM PST Sun Dec 12 2021

...PERIODS OF HEAVY MOUNTAIN SNOW OVERNIGHT AND AGAIN LATE SUNDAY
NIGHT INTO MONDAY...

Snow levels across Trinity County will range from 2500 to 3500 
feet tonight, lowest near and north of Highway 299, and will 
support accumulating snow at Buckhorn Summit, Oregon Mountain 
Pass, as well as portions of Highway 36. A foot or two of snow is 
likely at Scott Mountain Summit. There will be a relative lull in 
precipitation Sunday into Sunday night, with snow levels in the 
3000 to 4000 foot range. Another round of heavy precipitation will
arrive late Sunday night into Monday, followed by falling snow 
levels that will aid in additional heavy snow for elevations above
3500 feet in Trinity County and 2500 feet in eastern Humboldt and
Del Norte County.


CAZ107-121745-
/O.CON.KEKA.WS.W.0006.000000T0000Z-211212T1400Z/
/O.CON.KEKA.WS.A.0006.211213T0600Z-211214T1200Z/
Northern Trinity-
137 AM PST Sun Dec 12 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM PST EARLY
THIS MORNING ABOVE 2500 FEET...
...WINTER STORM WATCH REMAINS IN EFFECT FROM THIS EVENING THROUGH
LATE MONDAY NIGHT ABOVE 3500 FEET...

* WHAT...For the Winter Storm Warning above 2500 feet, heavy snow.
  Additional snow accumulations of up to 7 inches. For the Winter
  Storm Watch above 3500 feet, heavy snow possible. Total snow
  accumulations of 4 to 10 inches possible, with over a foot
  likely at Scott Mountain Summit.

* WHERE...Northern Trinity County.

* WHEN...For the Winter Storm Warning, until 6 AM PST early this 
  morning. For the Winter Storm Watch, from this evening through 
  late Monday night.

* IMPACTS...Travel could be very difficult to impossible along 
  high elevation portions of Highways 3 and 299, with slippery, 
  snow- covered roads and poor visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Monitor the latest forecasts for updates on this situation. 

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

&&

$$

CAZ108-121745-
/O.CON.KEKA.WS.W.0006.000000T0000Z-211212T1400Z/
/O.CON.KEKA.WS.A.0006.211213T0600Z-211214T1200Z/
Southern Trinity-
137 AM PST Sun Dec 12 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM PST EARLY
THIS MORNING ABOVE 3500 FEET...
...WINTER STORM WATCH REMAINS IN EFFECT FROM THIS EVENING THROUGH
LATE MONDAY NIGHT ABOVE 3500 FEET...

* WHAT...For the Winter Storm Warning above 3500 feet, heavy wet
  snow. Additional snow accumulations of up to 7 inches. Winds
  gusting as high as 35 mph. For the Winter Storm Watch above 3500
  feet, heavy snow possible. Snow accumulations of 4 to 10 inches
  possible.

* WHERE...Southern Trinity County.

* WHEN...For the Winter Storm Warning, until 6 AM PST early this 
  morning. For the Winter Storm Watch, from this evening through 
  late Monday night.

* IMPACTS...Travel could be very difficult to impossible along 
  portions of highways 3 and 36, with slippery, snow- covered 
  roads and poor visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Monitor the latest forecasts for updates on this situation. 

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

&&

$$

CAZ105-106-121745-
/O.CON.KEKA.WS.A.0006.211213T0600Z-211214T1200Z/
Northern Humboldt Interior-Southern Humboldt Interior-
137 AM PST Sun Dec 12 2021

...WINTER STORM WATCH REMAINS IN EFFECT FROM THIS EVENING THROUGH
LATE MONDAY NIGHT ABOVE 2500 FEET...

* WHAT...Heavy snow possible above 2500 feet. Total snow
  accumulations of 6 to 12 inches possible.

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

* WHEN...From this evening through late Monday night.

* IMPACTS...Travel could be very difficult to impossible at 
  passes along Highway 299 and other high elevation rural roads, 
  with slippery, snow- covered roads and poor visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation. 

&&

$$
675 
WWUS46 KEKA 121317
WSWEKA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Eureka CA
517 AM PST Sun Dec 12 2021

...PERIODS OF HEAVY MOUNTAIN SNOW LATE TONIGHT THROUGH MONDAY,
WITH LOWERING SNOW LEVELS...

In between storm systems, lighter showery precipitation will
linger today with snow levels tending to rise into the 3000 to
4000 ft range later this morning through tonight. Snow levels
should be above 3500 feet across most of our area Monday morning.
Steadier precipitation will move in tonight ahead of another cold
front, resulting in heavy mountain snow along the highest portions
of highway 36 and highway 3. 

As the cold front moves through from midday through Monday 
afternoon, snow levels will lower while some heavy precipitation 
lingers. Snow levels will drop below 2500 feet in the afternoon 
across Humboldt County, even reaching 2000 feet Monday evening 
across most of northwest California. That will allow for heavy 
snow around Berry Summit. Fortunately precipitation become lighter
and more showery Monday evening, with lighter accumulations on 
the passes farther east along the Highway 299 corridor. Some minor
accumulations of a coating to locally as much as 2 inches will be
possible at low elevations through Tuesday morning as snow levels
lower near or even below 1000 feet. 


CAZ107-108-122130-
/O.CAN.KEKA.WS.W.0006.000000T0000Z-211212T1400Z/
/O.UPG.KEKA.WS.A.0006.211213T0600Z-211214T1200Z/
/O.NEW.KEKA.WS.W.0007.211213T0600Z-211214T0600Z/
Northern Trinity-Southern Trinity-
517 AM PST Sun Dec 12 2021

...WINTER STORM WARNING IN EFFECT FROM 10 PM THIS EVENING TO
10 PM PST MONDAY ABOVE 3500 FEET...

* WHAT...Heavy snow expected above 3500 feet. Total snow
  accumulations of 5 to 10 inches along high elevation portions of
  Highway 3 and 36, with another 12 to 18 inches at Scott Mountain
  Summit. 

* WHERE...Northern Trinity and Southern Trinity Counties.

* WHEN...From 10 PM this evening to 10 PM PST Monday.

* IMPACTS...Travel could be very difficult to impossible along
  high elevation portions of Highways 3 and 36, with slippery,
  snow-covered roads and poor visibility. 


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.

&&

$$

CAZ105-106-122130-
/O.UPG.KEKA.WS.A.0006.211213T0600Z-211214T1200Z/
/O.NEW.KEKA.WS.W.0007.211213T1800Z-211214T0600Z/
Northern Humboldt Interior-Southern Humboldt Interior-
517 AM PST Sun Dec 12 2021

...WINTER STORM WARNING IN EFFECT FROM 10 AM TO 10 PM PST MONDAY
ABOVE 2500 FEET...

* WHAT...Heavy snow expected above 2500 feet. Total snow
  accumulations of 5 to 9 inches at Berry Summit on Highway 299,
  with higher amounts possible on other rural travel corridors 
  above 3000 feet.

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

* WHEN...From 10 AM to 10 PM PST Monday.

* IMPACTS...Travel could be very difficult along Highway 299 near
  Berry Summit, with slippery, snow-covered road conditions and
  poor visibility. Some high elevation rural roadways may become
  impassable. 

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.

&&

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 9, 3:23 AM PSTFreeze WarningEKAHumboldt, Mendocino30 hr
Dec 9, 12:54 PM PSTFrost AdvisoryEKADel Norte, Humboldt20 hr
Dec 9, 2:32 PM PSTGale WatchEKA13 hr

Nearby

Winter Storm Watches in California, 2021Every winter storm watch in 2021

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.