The Atmospheric River that NOAA has been forecasting since last Thursday is set to arrive tomorrow.
This Atmospheric River will be bringing copious amounts of rain, high elevation snow, hurricane force winds, and up to 36-foot surf to Washington, Oregon, and California.
Northwest California is forecast to see 22″ of precipitation in the next 7 days. That’s insane…
NOAA has issued a Hydrologic Outlook for Oregon and a Special Weather Statement for California (see below).
Mt. Baker WA, Mt. Rainier WA, Mt. Hood OR, Mt. Shasta CA, Mt. Lassen CA, and more are all going to get buried up top.
Bryan Allegretto of OpenSnow.com thinks we’ll see 1-2 feet of snow above snow line in Lake Tahoe, CA.
HUGE PRECIPITATION FORECASTS NEXT 7-DAYS:
- 21.8″ for Northwestern California
- 18.1″ for Olympic Mountains, WA
- 16.6″ for Southwestern Washington
SNOW LEVELS FORECAST for WEST COAST:
5,500-8,000′ for Washington
6,000-8,000′ for Oregon
Snow levels look to be above 8kft for the bulk of this precipitation event, but could dip to near 7kft in heavier bursts of precipitation and on the tail end of individual frontal systems through Saturday night. Sunday through Monday snow levels are expected to lower to near 6kft. - NOAA Medford, OR yesterday
8,500′ for California
SNOW LEVELS ARE LIKELY TO BE VERY HIGH WITH THIS STORM...MAINLY 8500 FEET AND ABOVE. THESE WILL BE FALLING SUNDAY NIGHT TO 6000 TO 7500 FEET WITH LIGHT SNOW ACCUMULATION POSSIBLE BY MONDAY MORNING OVER SIERRA PASSES. - NOAA Reno, NV today
SPECIAL WEATHER STATEMENT for CALIFORNIA:
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE RENO NV 355 AM PDT WED OCT 12 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 ...STRONG EARLY SEASON STORM TO IMPACT THE REGION THIS WEEKEND... A TWO PART STRONG PACIFIC STORM IS FORECAST TO IMPACT THE REGION BEGINNING LATE THURSDAY WITH PERIODS OF STRONG WINDS AND HEAVY SIERRA RAINFALL PERSISTING THROUGH MUCH OF THE WEEKEND. THE FIRST STORM WILL IMPACT NORTHEAST CALIFORNIA...WESTERN NEVADA AND THE NORTHERN SIERRA FROM THURSDAY NIGHT THROUGH FRIDAY. VERY STRONG AND POTENTIALLY DAMAGING WINDS WILL DEVELOP LATE THURSDAY WITH STRONG WINDS PERSISTING INTO FRIDAY. A SECOND ROUND OF STRONG AND POTENTIALLY DAMAGING WINDS ARE EXPECTED SATURDAY AFTERNOON INTO SUNDAY. THIS WILL BE THE FIRST HIGH WIND EVENT OF THE SEASON. DAMAGING WIND GUSTS ARE POSSIBLE THROUGH NORTHEAST CALIFORNIA AND 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. EXPECT DANGEROUS CONDITIONS ON AREA LAKES AND TURBULENCE IN ADDITION TO MOUNTAIN WAVE ACTIVITY AND WIND SHEAR FOR AVIATION. HOLIDAY DECORATIONS AND ANY LOOSE OUTDOOR ITEMS VULNERABLE TO HIGH WINDS SHOULD BE SECURED. LOCALLY HEAVY RAINFALL IS POSSIBLE ACROSS THE SIERRA THROUGH WEEKEND WITH THE FIRST WAVE PUSHING THROUGH FRIDAY MORNING AND THE SECOND WAVE SATURDAY AFTERNOON INTO SUNDAY NIGHT. RAINFALL TOTALS IN THE 1 TO 3 INCH RANGE COULD BE SEEN FOR PARTS OF THE NORTHERN SIERRA AND NORTHEAST CALIFORNIA. UP TO 4 INCHES IS POSSIBLE NEAR THE SIERRA CREST. SNOW LEVELS ARE LIKELY TO BE VERY HIGH WITH THIS STORM...MAINLY 8500 FEET AND ABOVE. THESE WILL BE FALLING SUNDAY NIGHT TO 6000 TO 7500 FEET WITH LIGHT SNOW ACCUMULATION POSSIBLE BY MONDAY MORNING OVER SIERRA PASSES. WE ENCOURAGE EVERYONE TO CHECK BACK FREQUENTLY FOR THE LATEST UPDATES AND ANY WATCHES...WARNINGS OR ADVISORIES.
HYDROLOGOIC OUTLOOK for OREGON:
HYDROLOGIC OUTLOOK NATIONAL WEATHER SERVICE MEDFORD, OR Hydrologic Outlook for significant rises on rivers and streams in Sisikyou and Modoc counties in California and Coos, Curry, Douglas, Jackson, Josephine, Klamath and Lake counties in Oregon. .A series of storms will move through the region beginning Thursday. A strong jet stream stretching across the Pacific Ocean will bring a steady stream of moisture into the Pacific Northwest with these storms. This will result in heavy rainfall across the region. The heaviest rainfall will be with the storm on Saturday as the remnants of Typhoon Songda are pulled into the stream. Rainfall amounts of over 6 inches at the coast and western Siskiyou county,to over thirteen inches on the extreme southern coast can be expected through Monday. Three to six inches can be expected inland to the Cascades with one to two inches east of the Cascades from Thursday to Monday. These forecast totals across the region are equal to or higher than the totals normally seen through the entire month of October. While main stem rivers will experience significant rises due to these storms, they are not expected to flood. Small streams and urban areas could experience high water or even flooding where there is poor drainage. As this is the first large storm of the rainy season, there is the potential for debris to clog storm drains, ditches and culverts resulting in flooding. Another concern is the heavy rain falling on recent burn scars. If you live downstream of a recent burn scar, or if you are just driving through a burn scar, stay alert as there is a high risk of flash flooding and debris flows in and below burned areas. The exact scenario for flooding and high water remains uncertain. This product will be updated as necessary. Watches and warnings may be issued by the National Weather Service if this situation worsens.