NOAA: “Abundant Moisture” From Typhoon Songda Headed to CA in Atmospheric River Form This Week

WeatherBrains | | WeatherWeather

video showing California getting clobbered my precipitation via two different waves on Thursday, Friday, Saturday, and Sunday this week.

NOAA has been forecasting an Atmospheric River for California this week since last Thursday.  Details are becoming clearer at it approaches.  Some forecasts are showing as much as 17″ of precipitation for northern California (see forecast map below).  Whoa…

NOAA has issued a Special Weather Statement for California calling for a two part storm to drop enormous amounts of precipitation.  Snow levels will be around 8,000-9,000′ for the bulk of the storm.

SNOW LEVELS ARE LIKELY
TO BE VERY HIGH WITH THIS STORM. SNOW ACCUMULATIONS ARE LIKELY
ON THE HIGHEST PEAKS...BUT SHOULD BE VERY LIMITED BELOW 8500
FEET. - NOAA Reno, NV yesterday
Heavy snow forecast on Mt. Shasta, CA this week. image: noaa, yesterday
Heavy snow forecast on Mt. Shasta, CA this week. image: noaa, yesterday

NOAA is calling for the Atmospheric River to bring “abundant moisture” including moisture from Typhoon Songda (currently near the Phillipines) to California this week.

“Abundant moisture currently over the western Pacific Ocean (including from Typhoon Songda) will make its way toward the West Coast.

By late this week, locally heavy rain will be possible, particularly along the northern CA coast and across the mountains!” – NOAA Sacramento, CA yesterday

Hurricane force winds accompanied by white-out conditions are forecast in the Cascade Mountains (Mt. Shasta, Mt. Lassen) of California.

Anyone planning to venture onto the Cascade Peaks should
very much take this into consideration, as white-out conditions and
high winds at or above hurricane force above treeline, will occur,
at times. - NOAA Medford, OR yesterday
17" of precipitation forecast in northern California next 7 days. image: noaa, yesterday
17″ of precipitation forecast in northern California next 7 days. image: noaa, yesterday

NOAA has forecast snow levels around 8,000-9,000′ for the bulk of the storm.  Mt. Shasta is forecast to see 5-7″ of precipitation which would translate to 5-7 feet of snow up high on Shasta during this storm.

Preliminary expected total precipitation
amounts from Thursday morning to sunrise Monday morning are 10 to
15 inches in the Brookings area and the Curry Coastal Mountains,
5-10 inches in other portions of the Coastal Counties, 3 to 5
inches in much of Douglas County and the Cascades and Siskiyous, 5
to 7 inches in the Mount Shasta area, 2 to 3 inches in the usually
drier Bear Creek portion of the Rogue Valley and Central and
Northern Shasta Valley, and 1 to 3 inches on the East Side.
- NOAA Medford, OR today
Snow levels look to be above 8kft for the bulk of this precipitation
event, but could dip to between 6kft and 7kft in heavier bursts of
precipitation and on the tail end of individual frontal systems.
- NOAA Medford, OR today
"An atmospheric river will be taking aim on northern California later this week and into the weekend, bringing heavy rains to the northern and coastal areas of the Golden State. The big question for us in central California is how far south will this moisture go? In our current precipitation confidence map, our highest confidence is in the Sierra Nevada around Yosemite National Park, as well as portions of Merced and Mariposa Counties. Confidence in rain decreases as you travel farther south in the San Joaquin Valley. Stay tuned for more details and updates as our forecast evolves." - NOAA Hanford, CA yesterday
“An atmospheric river will be taking aim on northern California later this week and into the weekend, bringing heavy rains to the northern and coastal areas of the Golden State. The big question for us in central California is how far south will this moisture go? In our current precipitation confidence map, our highest confidence is in the Sierra Nevada around Yosemite National Park, as well as portions of Merced and Mariposa Counties. Confidence in rain decreases as you travel farther south in the San Joaquin Valley. Stay tuned for more details and updates as our forecast evolves.” – NOAA Hanford, CA yesterday

SPECIAL WEATHER STATEMENT for CALIFORNIA:

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RENO NV
244 PM PDT MON OCT 10 2016

SURPRISE VALLEY CALIFORNIA-LASSEN-EASTERN PLUMAS-
EASTERN SIERRA COUNTIES-GREATER LAKE TAHOE AREA-MONO COUNTY-
MINERAL AND SOUTHERN LYON COUNTIES-GREATER RENO-CARSON CITY-
MINDEN AREA-WESTERN NEVADA BASIN AND RANGE INCLUDING PYRAMID LAKE-
NORTHERN WASHOE COUNTY-
INCLUDING THE CITIES OF...CEDARVILLE...EAGLEVILLE...
FORT BIDWELL...PORTOLA...SUSANVILLE...WESTWOOD...SIERRAVILLE...
LOYALTON...SOUTH LAKE TAHOE...TAHOE CITY...TRUCKEE...
MARKLEEVILLE...BRIDGEPORT...COLEVILLE...LEE VINING...
MAMMOTH LAKES...HAWTHORNE...YERINGTON...SMITH VALLEY...MINA...
SCHURZ...STATELINE...GLENBROOK...INCLINE VILLAGE...SPARKS...
VERDI...GARDNERVILLE...VIRGINIA CITY...FERNLEY...FALLON...
LOVELOCK...SILVER SPRINGS...NIXON...IMLAY...EMPIRE...GERLACH
244 PM PDT MON OCT 10 2016

...SIGNIFICANT EARLY SEASON STORM TO IMPACT THE REGION LATE THIS
WEEK...

A TWO PART STRONG PACIFIC STORM IS FORECAST TO PUSH INTO THE WEST
COAST STARTING THURSDAY MORNING THEN MOVE INLAND THURSDAY NIGHT.
THE FIRST PART OF THIS STORM WILL AFFECT NORTHEAST CALIFORNIA...
WESTERN NEVADA AND THE NORTHERN SIERRA FROM LATE THURSDAY NIGHT
THROUGH FRIDAY. THIS STORM HAS A DEEP MOISTURE TAP ASSOCIATED
WITH IT AND COULD BRING SIGNIFICANT AMOUNTS OF RAIN TO NORTHEAST
CALIFORNIA AND THE NORTHERN SIERRA FRIDAY. SNOW LEVELS ARE LIKELY
TO BE VERY HIGH WITH THIS STORM. SNOW ACCUMULATIONS ARE LIKELY
ON THE HIGHEST PEAKS...BUT SHOULD BE VERY LIMITED BELOW 8500
FEET.

VERY STRONG AND GUSTY WINDS ARE LIKELY ACROSS WESTERN NEVADA
FRIDAY. THIS SHOULD BE THE FIRST HIGH WIND EVENT OF THE SEASON.
DAMAGING WINDS GUSTS ARE POSSIBLE EAST OF THE SIERRA...ESPECIALLY
FROM THE HIGHWAY 395 CORRIDOR EAST TO NEAR THE HIGHWAY 95
CORRIDOR. DANGEROUS CROSS WINDS COULD MAKE TRAVEL FOR HIGH PROFILE
VEHICLES EXTREMELY DIFFICULT. ANY OUTDOOR DECORATIONS VULNERABLE
TO HIGH WINDS SHOULD BE SECURED.

THE SECOND PART OF THIS STORM SYSTEM SHOULD AFFECT THE REGION
SUNDAY. SNOW LEVELS ARE LIKELY TO BE A LITTLE LOWER WITH THIS
SYSTEM IN THE SIERRA AND GUSTY WINDS WILL DEVELOP ONCE MORE
ACROSS WESTERN NEVADA. TOTAL PRECIPITATION AMOUNTS WITH THIS PART
OF THE SYSTEM COULD BE ON PAR WITH THE INITIAL SURGE...OR A
LITTLE HIGHER. ANOTHER ROUND OF DAMAGING WIND GUSTS IS ALSO
POSSIBLE FOR WESTERN NEVADA LATE SATURDAY NIGHT AND SUNDAY
MORNING.

DETAILS ARE STILL COMING INTO FOCUS WITH THIS STORM SYSTEM. WE
ENCOURAGE EVERYONE TO CHECK BACK FREQUENTLY FOR THE LATEST
UPDATES AND ANY WATCHES...WARNINGS OR ADVISORIES.
image: noaa, reno nv yesterday
image: noaa, reno nv yesterday

Related Articles

One thought on “NOAA: “Abundant Moisture” From Typhoon Songda Headed to CA in Atmospheric River Form This Week

Got an opinion? Let us know...