Winter Storm Watch 1, NWS Eureka, CA

728 
WWUS46 KEKA 061932
WSWEKA

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE EUREKA CA
1132 AM PST FRI JAN 6 2017

CAZ102-105>108-111-070345-
/O.CON.KEKA.WW.Y.0002.170107T0600Z-170107T1800Z/
/O.CON.KEKA.WS.A.0001.170107T0600Z-170107T1800Z/
DEL NORTE INTERIOR-NORTHERN HUMBOLDT INTERIOR-
SOUTHERN HUMBOLDT INTERIOR-NORTHERN TRINITY-SOUTHERN TRINITY-
NORTHEASTERN MENDOCINO INTERIOR-
1132 AM PST FRI JAN 6 2017

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 10 PM THIS
EVENING TO 10 AM SATURDAY ABOVE 2000 FEET...
...WINTER STORM WATCH REMAINS IN EFFECT FROM 10 PM THIS
EVENING THROUGH SATURDAY MORNING ABOVE 3500 FEET...

SNOW ACCUMULATIONS...1 TO 4 INCHES ABOVE 2000 FEET WITH HIGHER
ACCUMULATIONS POSSIBLE ABOVE 3500 FEET.

LOCATIONS IMPACTED...COLLIER TUNNEL...BERRY SUMMIT...OREGON
MOUNTAIN PASS...BUCKHORN SUMMIT....SOUTH FORK MOUNTAIN...
DINSMORE...HAYFORK.

HIGHWAYS IMPACTED...PASSES ON HWY 199...HWY 299...HWY 36...HWY 3.

FOR A DETAILED VIEW OF THE HAZARD AREA...VISIT
HTTP://WWW.WEATHER.GOV/EUREKA/HAZARDS

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW
WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW
COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT
SNOW...SLEET...OR ICE ACCUMULATIONS THAT MAY IMPACT TRAVEL.
CONTINUE TO MONITOR THE LATEST FORECASTS.

$$

850 
WWUS46 KEKA 062036
WSWEKA

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE EUREKA CA
1236 PM PST FRI JAN 6 2017

CAZ102-105>108-111-070445-
/O.UPG.KEKA.WS.A.0001.170107T0600Z-170107T1800Z/
/O.NEW.KEKA.WS.W.0002.170107T0600Z-170107T2000Z/
/O.EXT.KEKA.WW.Y.0002.170107T0600Z-170107T2000Z/
DEL NORTE INTERIOR-NORTHERN HUMBOLDT INTERIOR-
SOUTHERN HUMBOLDT INTERIOR-NORTHERN TRINITY-SOUTHERN TRINITY-
NORTHEASTERN MENDOCINO INTERIOR-
1236 PM PST FRI JAN 6 2017

...WINTER STORM WARNING IN EFFECT FROM 10 PM THIS EVENING TO NOON
SATURDAY ABOVE 3500 FEET...
...WINTER WEATHER ADVISORY NOW IN EFFECT FROM 10 PM THIS EVENING
TO NOON SATURDAY ABOVE 2000 FEET...

SNOW ACCUMULATIONS...6 TO 12 INCHES ABOVE 3500 FEET...1 TO 4
INCHES ABOVE 2000 FEET. HIGHER ACCUMULATIONS POSSIBLE ALONG
HIGHEST RIDGETOPS.

LOCATIONS IMPACTED...COLLIER TUNNEL...BERRY SUMMIT...OREGON MOUNTAIN
PASS...BUCKHORN SUMMIT...SOUTH FORK MOUNTAIN...WEAVERVILLE...
TRINITY CENTER...AND HAYFORK.

HIGHWAYS IMPACTED...PASSES ON 199...299...36...3.

FOR A DETAILED VIEW OF THE HAZARD AREA...VISIT
HTTP://WWW.WEATHER.GOV/EUREKA/HAZARDS

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER
CONDITIONS ARE EXPECTED OR OCCURRING.  SIGNIFICANT AMOUNTS OF SNOW
ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN
EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT...FOOD...AND
WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.

A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW
WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW
COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

$$

AREA FORECAST DISCUSSION
National Weather Service Eureka CA
326 PM PST Thu Jan 5 2017

.SYNOPSIS...Dry weather will persist through Friday evening. A
series of storm systems bring widespread heavy rainfall along
with mountain snow to northern California for the weekend into
next week.

&&

.DISCUSSION...Mostly clear skies and light winds will allow
radiational cooling across the area again tonight with low
temperatures similar to last night to perhaps a degree or two
colder. Due to lingering low-level and ground moisture, valley
fog may limit this cooling a bit again tonight. A Hard Freeze
Warning has been issued for the Redwood Coast as well as the
Mendocino Coast (where we issue Hard Freeze Warnings through the
season when necessary). Low temperatures along the coast will be
near record lows.

The big story will be a developing atmospheric river event this
weekend and into next week. Widespread moderate to heavy rains
are expected. Models continue to focus the main plume of moisture
S of our County Warning Area this weekend into Monday, but
widespread rains of 3 to 6 inches appear likely through early next
week with local amounts of 10 inches possible over exposed terrain
due to orographic effects.

After a decrease in precipitation intensity late Monday and early
Tuesday, yet another storm system is forecast to impact the area
Tuesday afternoon through Wednesday. Early indications are that
this system may be targeted a bit farther to the N and have more
ramifications for the local area, especially considering the
antecedent conditions set up by rains this weekend. See the
hydrology section below for more info. /SEC

&&

.AVIATION...VFR conditions expected for the next 24 hours across all
terminals expected, as clear skies will prevail. Fog potential is
very low as we have another day of drying across the area during the
daytime on Thursday. Winds will remain fairly light. /RCL

&&

.MARINE...Another day of light winds and low seas through Friday
as pressure gradient remains weak over the NW California waters.
Southerly pressure gradient will develop on Friday, thus the winds
will shift to the south Friday morning, and increase to around 10 to
15 kt by the afternoon. During the overnight hours on Friday, winds
will further increase to 15 to 25 kt range on the outside waters as
the southerly pressure gradient tightens. Do expect potential gale
force wind gusts over the southern outside waters Saturday morning.
The first weather front will pass through Saturday morning, and the
south winds will diminish a bit on Saturday night. Do expect the
southerly winds to persist through the rest of the forecast period
into next week as the southerly pressure gradient persists.

Low seas will continue through Friday. With the increasing southerly
winds, wind waves will increase late Friday night. Right now,
thinking about seas of 8 to 11 ft at around 8 to 9 seconds on
Saturday, with the highest seas in the southern outside waters. The
southerly wind waves will persist through next week as southerly
winds persist. /RCL

&&

.HYDROLOGY...Area rivers are forecast to experience rapid rises
over the weekend, with the Mad River at Arcata and the Van Duzen
River at Bridgeville rising to monitor stage by Sunday night or
Monday and the Navarro River at Navarro and the Eel River at
Fernbridge forecast to reach flood stage around the same time
period. The intensity of rainfall on Saturday, as well as the
ultimate position of the deepest moisture plume on Sunday and
Monday, will have a major impact on the ultimate river behavior.
In addition, additional rises appear likely next week if the
forecast pans out. Residents along local main stem rivers, as well
as smaller tributaries, should continue to monitor the latest
forecasts. /SEC

&&

.EKA WATCHES/WARNINGS/ADVISORIES...
CA...Hard Freeze Warning from midnight tonight to 9 AM Friday for
     CAZ101-103-109.

NORTHWEST CALIFORNIA COASTAL WATERS...
     Small Craft Advisory from 9 AM Saturday to 9 AM Sunday for
     PZZ450.
     Small Craft Advisory from 3 AM Saturday to 9 AM Sunday for
     PZZ455.
     Small Craft Advisory from 9 PM Friday to 9 AM Sunday for
     PZZ470.
     Gale Watch from late Friday night through Saturday afternoon for
     PZZ475.

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

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http://www.facebook.com/NWSEureka
http://www.twitter.com/nwseureka

For forecast zone information
see the forecast zone map online:
http://www.weather.gov/eureka/zonemap.png

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE EUREKA CA
306 PM PST THU JAN 5 2017

CAZ101-103-109-062315-
COASTAL DEL NORTE-NORTHERN HUMBOLDT COAST-MENDOCINO COAST-
306 PM PST THU JAN 5 2017

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

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHWEST CALIFORNIA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

LOWS FRIDAY MORNING WILL BE INTO THE MID 20S TO NEAR 30 DEGREES
ALONG THE REDWOOD COAST AND COASTAL MENDOCINO COUNTY. A HARD
FREEZE WARNING IS IN EFFECT LATE TONIGHT AND EARLY FRIDAY MORNING.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.

A SERIES OF STORM SYSTEMS WILL AFFECT THE REGION STARTING THIS
WEEKEND AND CONTINUING THROUGH AT MUCH OF NEXT WEEK. WIDESPREAD
HEAVY RAINFALL IS EXPECTED. RAPID MAIN STEM RIVER RISES ARE
ANTICIPATED AND FLOODING OF URBAN AREAS...SMALL STREAMS...CREEKS...
AND LOW-LYING AREAS ARE POSSIBLE.

THE COMBINATION OF HIGH ASTRONOMICAL TIDES AND RAINFALL RUNOFF
MAY PRODUCE COASTAL FLOODING NEXT WEEK. WINDS WILL BECOME GUSTY
OVER THE COASTAL HEADLAND AND RIDGETOPS THIS WEEKEND AND AGAIN
TOWARD THE MIDDLE OF NEXT WEEK.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

FOR FURTHER DETAILS PLEASE REFER TO NOAA WEATHER RADIO OR
WEATHER.GOV/EUREKA.

CAZ102-105>108-110>113-062315-
DEL NORTE INTERIOR-NORTHERN HUMBOLDT INTERIOR-
SOUTHERN HUMBOLDT INTERIOR-NORTHERN TRINITY-SOUTHERN TRINITY-
NORTHWESTERN MENDOCINO INTERIOR-NORTHEASTERN MENDOCINO INTERIOR-
SOUTHWESTERN MENDOCINO INTERIOR-SOUTHEASTERN MENDOCINO INTERIOR-
306 PM PST THU JAN 5 2017

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHWEST CALIFORNIA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

NO HAZARDOUS WEATHER IS EXPECTED.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.

A SERIES OF STORM SYSTEMS WILL AFFECT THE REGION STARTING THIS
WEEKEND AND CONTINUING THROUGH AT MUCH OF NEXT WEEK. WIDESPREAD
HEAVY RAINFALL IS EXPECTED. RAPID MAIN STEM RIVER RISES ARE
ANTICIPATED AND FLOODING OF URBAN AREAS...SMALL STREAMS...CREEKS...
AND LOW-LYING AREAS ARE POSSIBLE.

WINDS WILL BECOME GUSTY OVER THE RIDGETOPS THIS WEEKEND AND AGAIN
TOWARD THE MIDDLE OF NEXT WEEK.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

FOR FURTHER DETAILS PLEASE REFER TO NOAA WEATHER RADIO OR
WEATHER.GOV/EUREKA.

CAZ104-062315-
SOUTHWESTERN HUMBOLDT-
306 PM PST THU JAN 5 2017

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHWEST CALIFORNIA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

NO HAZARDOUS WEATHER IS EXPECTED.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.

A SERIES OF STORM SYSTEMS WILL AFFECT THE REGION STARTING THIS
WEEKEND AND CONTINUING THROUGH AT MUCH OF NEXT WEEK. WIDESPREAD
HEAVY RAINFALL IS EXPECTED. RAPID MAIN STEM RIVER RISES ARE
ANTICIPATED AND FLOODING OF URBAN AREAS...SMALL STREAMS...CREEKS...
AND LOW-LYING AREAS ARE POSSIBLE.

THE COMBINATION OF HIGH ASTRONOMICAL TIDES AND RAINFALL RUNOFF
MAY PRODUCE COASTAL FLOODING NEXT WEEK. WINDS WILL BECOME GUSTY
OVER THE COASTAL HEADLAND AND RIDGETOPS THIS WEEKEND AND AGAIN
TOWARD THE MIDDLE OF NEXT WEEK.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

FOR FURTHER DETAILS PLEASE REFER TO NOAA WEATHER RADIO OR
WEATHER.GOV/EUREKA.