Second Round Of Wet Weather Set For West Coast

By: Shaun Tanner , 6:42 AM GMT on November 29, 2012

Share this Blog
5
+

The first storm in a parade of storms made its way through Northern California Wednesday. As expected, the storm brought areas of heavy rain and widespread moderate rain mainly north of the San Francisco Bay Area. Here are some Wednesday rainfall amounts for the hills north of San Francisco. These areas are normally the wettest for storms like what was experienced on Wednesday.

SONOMA COUNTY AIRPORT............. 1.27
SANTA ROSA........................ 1.14
VNOC1 VENADO 1260`................ 2.00
HWKC1 HAWKEYE RAWS 2024`.......... 1.54
PTBC1 PETALUMA-D ST BRIDGE........ 0.75

.NAPA COUNTY
NAPA COUNTY AIRPORT............... 0.70
MSHC1 MOUNT ST HELENA 4140`....... 1.73
NRYC1 YOUNTVILLE CROSS ROAD....... 0.63
NAPC1 ATLAS PEAK 1680`............ 0.64
NAAC1 NAPA-LINCOLN BRIDGE......... 0.59


In addition, here are Wednesday rainfall amounts for counties farther to the north such as Mendocino, Del Norte, and Humboldt.

...DEL NORTE COUNTY...
(3 NNW) CRESCENT CITY (43 FT)(COOP) 1.00 IN
JACK MC NAMARA FIELD AIRPORT (ASOS) 0.86 IN
FORT DICK RIVER (GOES) 0.68 IN
GASQUET RS (387 FT)(COOP) 0.60 IN
ELK VALLEY (1705 FT)(COOP) 0.20 IN

...HUMBOLDT COUNTY...
1 SW HONEYDEW (370 FT)(COOP) 2.80 IN
WILLOW CRK 1 NW (464 FT)(COOP) 1.78 IN
BRIDGEVILLE RAIN GAGE (646 FT)(GOES)1.40 IN
KNEELAND RAWS (2737 FT)(GOES) 1.27 IN
4 SE MIRANDA (266 FT)(COOP) 1.00 IN
TRINTY RIVER AT HOOPA (333 FT)(GOES)0.96 IN
BIG HILL RAWS (3570 FT)(GOES) 0.92 IN
FORT SEWARD (217 FT)(COOP) 0.88 IN
ALDERPOINT GOES (923 FT)(GOES) 0.74 IN
REDWOOD CK NR (5 FT)(GOES) 0.68 IN
EUREKA,CA (20 FT)(COOP) 0.59 IN
ARCATA AIRPORT (223 FT)(ASOS) 0.48 IN
ORLEANS RS (433 FT)(COOP) 0.44 IN

...MENDOCINO COUNTY...
YORKVILLE (1100 FT)(GOES) 2.16 IN
BOONVILLE RAWS (644 FT)(GOES) 1.57 IN
RUSSIAN RIVER NR CLOVERDALE 6NW 1.48 IN
FORT BRAGG 5 N (123 FT)(COOP) 1.38 IN
WILLITS HOWARD RANGER STN (GOES) 1.32 IN
UKIAH MUNICIPAL AIRPORT (AWOS) 1.29 IN
LEGGETT (703 FT)(COOP) 1.24 IN
EEL RIVER RAWS (1610 FT)(GOES) 0.94 IN


Now, I know what you are thinking. When you look at those rainfall numbers, they don't seem all that impressive. There is a lesson that can be learned from looking at these rainfall amounts. When a parade of storms like what the West Coast is experiencing sets up, the first of these storms often ends up being weaker than what the models had predicted. Arguably, this case could be made for the storm that moved through Northern California Wednesday. But, this shouldn't be the lesson for the rest of the parade. Often, this first storm primes the atmosphere with moisture that the subsequent storms could utilize bring very heavy rain to the state. This appears to be the case for the next two storms.

Second Storm Poised To Strike

A second storm out in the Pacific Ocean is set to move gradually closer to the coast Thursday, but California will largely experience a brief break from the wet conditions for much of Thursday. The second storm will be stronger than the first, washing onto the north coast of California in the afternoon and evening.

The severe weather map paints a story of what to expect in California.



Winter Weather Warnings are posted for the western slopes of the Sierra Nevadas as as much as 30 inches of snow is expected to fall to Friday afternoon for elevations higher than 6,000 feet. This is a fairly high elevation for snow level for the Sierras for a storm during this time of year.

Also, Flood Watches are posted for some rivers in Northern California. One of these rivers is the Navarro River, which currently has a stage of 2.9 feet. Here is what is impressive. The flood stage for the Navarro River at Navarro is 23.0 feet. That means that it is currently 20 FEET below flood stage, yet the NWS has determined that it is prudent to issue a Flood Watch for the river. Further, flood stage may be reached by Friday morning and the river could hit 26 feet by midday Friday. So between Thursday morning and Friday afternoon, the river is expected to rise as much as 23 feet. That is a tremendous amount of water.



This is the HPC precipitation forecast for the second storm. You can see a bulls eye of rain along the western slopes of the Sierras. The third storm over weekend is expected to be even stronger.

Reader Comments

Comments will take a few seconds to appear.

Post Your Comments

Please sign in to post comments.

or Join

Not only will you be able to leave comments on this blog, but you'll also have the ability to upload and share your photos in our Wunder Photos section.

Display: 0, 50, 100, 200 Sort: Newest First - Order Posted

Viewing: 22 - 1

Page: 1 — Blog Index

22. WunderAlertBot (Admin)
7:04 AM GMT on December 01, 2012
shauntanner has created a new entry.
21. Luisport
12:08 PM GMT on November 30, 2012
AccuWeather.com‏@breakingweather

Rain totals in CA over the past 48 hrs: Mount Shasta, 5.54"; Crescent City, 4.97"; Santa Rosa, 4.06"; Sacramento, 1.23"
Member Since: October 27, 2012 Posts: 0 Comments: 2026
20. Luisport
12:00 PM GMT on November 30, 2012
Roberta Gonzales‏@RobertaCBS5

19 years in Bay Area and I have never heard such a powerful storm! Outages: 2,700 without power Peninsula, 6,000 South Bay, 2,000 North Bay.
Member Since: October 27, 2012 Posts: 0 Comments: 2026
19. Luisport
11:26 AM GMT on November 30, 2012
Melissa Crowley‏@MelissaCrowley

Flooding reported Arden@Avondale chains on 80, Sf flooding Treasure Island News10 crews out on streets live at 5am#news10
Member Since: October 27, 2012 Posts: 0 Comments: 2026
18. Luisport
11:15 AM GMT on November 30, 2012
Heavy Rain Slams Northern Calif., Northwest
UPDATED 1:30 AM PST, November 30, 2012
UPDATED By WeatherBug Meteorologist, Andrew Rosenthal

Soggy weather will continue to pound the West Coast this weekend, as a strong Pacific storm spins off the coast of the Northwest. Rainfall amounts could exceed a foot across northern California, with the rest of the Northwest and northern California seeing 5 to 10 inches. Significant flooding and dangerous landslides will be possible.
A low pressure system is swirling along the Pacific Northwest Coast, and will move very slowly over the next few days. Southwesterly winds will sweep waves of moisture onto the Pacific Coast over next five days. All this moisture will be dumped over Washington, Oregon, California, and even Idaho.
The rain will be heavy at times; by Sunday evening, more than a foot of rain will have fallen along the foothills of the Coast Range and Sierra with 4 to 5 inches farther north along the Oregon and Washington coasts.
As colder air pushes in from the west, snow levels will fall to 6,000 feet. Therefore, only the highest elevations will experience heavy, wet snow. Elevations above 6,000 feet will see 4 to 8 inches with places like Mt. Lassen getting more than a foot. Winter Storm Warnings have been issued for the northern and central Sierra Nevada, and also the Teton and Sawtooth ranges.
Flood Watches and Warnings stretch throughout northern and central California as well as southwestern Oregon through the weekend, and flooding will be exacerbated in burned areas across northern California caused by this summer`s wildfires. The lack of vegetation along the hillsides will increase the runoff of water and mud. Additional flooding is possible as a result of snowmelt in the Sierra Nevada.
In addition to the heavy rain, gusty winds will increase as the low strengthens offshore. The mountains will see the strongest winds, with gusts up to 60 mph expected. The Central Valley will see sustained 20 to 30 mph with gusts of 40 to 55 mph. These winds will make travel along Interstates 5 and 80, U.S Route 50 and Highway 99 difficult, particularly for those in high-profile vehicles, and could also lead to localized power outages.
Wind Advisories are in effect for the Sacramento and San Joaquin valleys as well as the eastern Sierra and south-central Oregon. High Wind Watches and Warnings stretch across the eastern Sierra, along the northern California coast, into Oregon`s Klamath Basin, as even as far east as portions of western Montana.
The heavy rain chances will continue into early next week as the weather pattern remains stuck in neutral. The pattern won`t break until the central U.S. high pressure slides east, which won`t happen until the new work week is well underway.
http://web.live.weatherbug.com/StormCentral/Page/ StormCentral.aspx?lid=SC2&&story_id=14302&zcode=z4 641&zip=90045&Units=0&rnd=112720121154-14302&utm_s ource=twitterfeed&utm_medium=twitter
Member Since: October 27, 2012 Posts: 0 Comments: 2026
17. Luisport
11:13 AM GMT on November 30, 2012
NWSBayArea‏@NWSBayArea

SFO reported a thunderstorm in the last 10 minutes with wind gusts to 54 mph! #bayarearain #sfwind #sfweather
Member Since: October 27, 2012 Posts: 0 Comments: 2026
16. Luisport
11:02 AM GMT on November 30, 2012
Jim Cantore‏@JimCantore

Crescent City, CA law enforcement reports FLOOD at 05:51 PM PST -- vicinity of Crescent City...sandmine rd...roadway flooded via @NWS_Eureka
Member Since: October 27, 2012 Posts: 0 Comments: 2026
15. Luisport
10:59 AM GMT on November 30, 2012
Ryan Maue‏@RyanMaue

Awesome. NCEP put the 1.33 km NAM-Fire Wx Nest over N. California. 36-hour forecast precip shows orography well. http://twitter.com/RyanMaue/status/274308634211667 968/photo/1/large
Member Since: October 27, 2012 Posts: 0 Comments: 2026
14. Luisport
10:57 AM GMT on November 30, 2012
AccuWeather.com‏@breakingweather

Strong winds continue to pound California. Recent gusts-San Fran: 36mph; Redding: 61mph; Red Bluff: 43mph
Member Since: October 27, 2012 Posts: 0 Comments: 2026
13. Luisport
10:55 AM GMT on November 30, 2012

Melissa Crowley‏@MelissaCrowley

Some flooding reported 50/99 connector in Sac, chains on Highway 50 now#news10

40 mNWSBayArea‏@NWSBayArea

Windy out there! Peak wind gusts from the last hour, Santa Rosa 38 mph, SFO 46 mph, Salinas 33 mph, and San Jose 26 mph! #bayarearain #wind
Member Since: October 27, 2012 Posts: 0 Comments: 2026
12. Luisport
11:03 PM GMT on November 29, 2012
Live Doppler 7 HD http://abclocal.go.com/kgo/livenow?id=6664986
Member Since: October 27, 2012 Posts: 0 Comments: 2026
11. Luisport
10:59 PM GMT on November 29, 2012
[b]Event: Flash Flood Watch

Flash Flood Watch issued November 29 at 11:22AM PST until November 30 at 3:00PM PST by NWS Monterey


DEFAULT OVERVIEW SECTION ...FLASH FLOOD WATCH IN EFFECT FROM 7 PM PST THIS EVENING THROUGH FRIDAY AFTERNOON... THE NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA HAS ISSUED A

* FLASH FLOOD WATCH FOR A PORTION OF CALIFORNIA...INCLUDING THE FOLLOWING AREAS...COASTAL NORTH BAY...INCLUDING POINT REYES NATIONAL SEASHORE...NORTH BAY INTERIOR VALLEYS...NORTH BAY MOUNTAINS...NORTHERN MONTEREY BAY...SAN FRANCISCO...SAN FRANCISCO PENINSULA COAST AND SANTA CRUZ MOUNTAINS.

* FROM 7 PM PST THIS EVENING THROUGH FRIDAY AFTERNOON

* RAIN IS SCHEDULED TO ARRIVE TONIGHT AND CONTINUE THROUGH THE NIGHT AND INTO FRIDAY. COPIOUS AMOUNTS ARE EXPECTED IN HIGHER ELEVATION AREAS...UP TO SEVERAL INCHES. GIVEN THAT WATERSHEDS ARE SATURATED FROM THE PRIOR STORM ON TUESDAY...SOME SMALLER CREEKS MAY APPROACH OR OVERTOP BANKS. VALLEY BOTTOM CREEKS IN THE NORTH BAY...PARTICULARLY THOSE IN NAPA AND PETALUMA NEED TO BE MONITORED CLOSELY.

* STORM DRAINS MAY BE OVERWHELMED AND CULVERTS MAY BECOME BLOCKED BY DEBRIS...URBAN FLOODING IS LIKELY. AT TIMES...RAINFALL RATES MAY EXCEED GUIDANCE THRESHOLDS FOR PRODUCING DEBRIS FLOWS AND SLIDES IN MOUNTAINOUS AREAS.


Target Area: Coastal North Bay Including Point Reyes National Seashore; North Bay Interior Valleys; North Bay Mountains; Northern Monterey Bay; San Francisco; San Fransisco Peninsula Coast; Santa Cruz Mountains[/b]
Member Since: October 27, 2012 Posts: 0 Comments: 2026
10. Luisport
10:54 PM GMT on November 29, 2012

Jim Cantore‏@JimCantore

4 NE Mount Rose SKI ARE, NV b-- mesonet reports NON-TSTM WND GST of M80.00 MPH -- at the base of the Mount Rose highway near Galena. #NVwx

2 minJim Cantore‏@JimCantore

5 SE Reno [Washoe Co, NV] asos reports NON-TSTM WND GST of M59.00 MPH at 10:55 AM PST -- measured at the Reno-tahoe international airport
Member Since: October 27, 2012 Posts: 0 Comments: 2026
9. Luisport
10:47 PM GMT on November 29, 2012
ABC7 News‏@abc7newsBayArea

National Weather Service says a flash flood watch will be in effect from 7pm PST through Friday afternoon. http://abclocal.go.com/kgo/severeweather?pt=detail &&zone=CA124CD0C20B08.FlashFloodWatch.124CD0D1E0F0 CA.MTRFFAMTR.a7702fd9376aaebbe25c252ef1e418b3 #BayAreaRain
Member Since: October 27, 2012 Posts: 0 Comments: 2026
8. Luisport
7:55 PM GMT on November 29, 2012
NWSBayArea‏@NWSBayArea

High surf advisory for the coastline. http://www.facebook.com/photo.php?fbid=39336583073 8779&set=a.128008810607817.30966.121579457917419&t ype=1&theater #bayarearain #highsurf #surfadvisory #sfweather
Member Since: October 27, 2012 Posts: 0 Comments: 2026
7. Luisport
7:10 PM GMT on November 29, 2012
NWSBayArea‏@NWSBayArea

Timing of the heavy rain forecast to impact the area tonight and Friday. http://www.facebook.com/photo.php?fbid=39335435740 6593&set=a.128008810607817.30966.121579457917419&t ype=1&theater #bayarearain #sfweather #heavyrain
Member Since: October 27, 2012 Posts: 0 Comments: 2026
6. Luisport
6:39 PM GMT on November 29, 2012

Laura Skirde‏@LauraSkirdeWx

Winter Storm Warning in the Sierra tonight through tomorrow night above 7000' - snowy & windy! @CBSSacramento #cawx http://twitter.com/LauraSkirdeWx/status/2742200783 69746945/photo/1

1 minLaura Skirde‏@LauraSkirdeWx

Flood Watch tonight through Sunday, lot of rain moving in! @CBSSacramento #cawx #sacwx http://twitter.com/LauraSkirdeWx/status/2742198206 71717377/photo/1

2 minLaura Skirde‏@LauraSkirdeWx

Wind Advisory tonight through Sunday night, getting gusty again! @CBSSacramento#cawx #sacwx http://twitter.com/LauraSkirdeWx/status/2742197205 41106176/photo/1
Member Since: October 27, 2012 Posts: 0 Comments: 2026
5. Luisport
6:35 PM GMT on November 29, 2012
AccuWeather.com‏@breakingweather

Rounds of strong winds & rough seas batter the West Coast into next week, threatening power outages.
http://www.accuweather.com/en/weather-news/west-co ast-storms-power-outage/2132531
Member Since: October 27, 2012 Posts: 0 Comments: 2026
4. Luisport
5:05 PM GMT on November 29, 2012
Heavy Rain Invading Northern Calif., Northwest
UPDATED 7 AM PST, November 29, 2012
UPDATED By WeatherBug Sr. Meteorologist, Julie Gaddy

Although one round of rain has passed onto the West Coast, the threat of soggy weather is far from over from California to Washington. Many waves of rain will arrive along the northern California and Pacific Northwest Coast through the weekend. Rainfall amounts could exceed a foot across northern California, with the rest of the Northwest and northern California seeing 5 to 10 inches. Significant flooding and dangerous landslides will be possible.
A low pressure system is swirling along the Pacific Northwest Coast, and will move little over the next few days. Southwesterly winds will sweep waves of moisture onto the Pacific Coast over next five days. All this moisture will be dumped over Washington, Oregon, California, and even Idaho.
The rain will be heavy at times; by Sunday, more than a foot of rain will have fallen along the foothills of the Coast Range and Sierra with 4 to 5 inches farther north along the Oregon and Washington coasts.
As colder air pushes in from the west, snow levels will fall to 6,000 feet. Therefore, only the highest elevations will experience heavy wet snow. Elevations above 6,000 feet will see 4 to 8 inches with places like Mt. Lassen getting more than a foot. Winter Storm Warnings have been issued for the Siskiyous and the northern and central Sierra Nevada, and also the Teton and Sawtooth ranges.
Flood Watches stretch throughout northern California and southwestern Oregon for Thursday to Sunday. Flooding will be exacerbated in burnt areas across Northern California caused by this summer`s wildfires. The lack of vegetation along the hillsides will increase the runoff of water and mud. Additional flooding is possible as a result of snowmelt in the Sierra Nevada.
In addition to the heavy rain, gusty winds will increase as the low strengthens offshore. The mountains will see the strongest winds, with gusts up to 60 mph expected. The Central Valley will see sustained 20 to 30 mph with gusts of 40 to 55 mph. These winds will make travel along Interstates 5 and 80, U.S Route 50 and Highway 99 difficult, particularly for those in high-profile vehicles, and could also lead to localized power outages.
Wind Advisories are in effect for the Sacramento and northern San Joaquin valleys as well as the eastern Sierra and south-central Oregon. High Wind Watches and Warnings stretch across the eastern Sierra, along the northern California coast and in Oregon`s Klamath Basin.
The heavy rain chances will continue through the weekend as the weather pattern remains stuck in neutral. The pattern won`t break until the central U.S. high pressure slides east, which won't happen until early next week.
Wednesday brought Round One of the heavy rain to the West Coast. Santa Cruz, Calif., reported 2.41 inches of rain, while Sebastopol, Calif., measured 1.43 inches of rain. Honeydew, Calif., saw 2.92 inches of rain.

http://web.live.weatherbug.com/StormCentral/Page/ StormCentral.aspx?lid=SC2&&story_id=14302&zcode=z4 641&zip=90045&Units=0&rnd=112720121154-14302&utm_s ource=twitterfeed&utm_medium=twitter
Member Since: October 27, 2012 Posts: 0 Comments: 2026
3. Luisport
4:38 PM GMT on November 29, 2012
AccuWeather.com‏@breakingweather

RT @nwsseattle: High tides & low atmospheric pressure equals possible inland water minor tidal overflow through Sat.

4 hAccuWeather.com‏@breakingweather

Light rain & fog are impacting Los Angeles early this AM, reducing the visibility below 2 mi. Motorists use caution.

4 hAccuWeather.com‏@breakingweather

RT @accu_jesse: West. Storm so far: Power outages in Santa Cruz & San Mateo Co.; 93 mph wind gust @ Squaw Peak, CA.
Member Since: October 27, 2012 Posts: 0 Comments: 2026
2. Luisport
11:21 AM GMT on November 29, 2012
the National Weather Service in Eureka has issued a

* Flood Watch for
the Navarro river at Navarro.
* From Friday morning to Friday evening... or until the watch is
cancelled.
* At 3:15 PM Wednesday the stage was 2.9 feet.
* Minor flooding is possible.
* Flood stage is 23.0 feet.
* Forecast... flood stage may be reached by Friday morning.
* This river is expected to rise above flood stage of 23 ft
Friday morning then forecast to crest near 26 ft near noon Friday
then forecast to fall below flood stage of 23 ft Friday evening.
* Impacts... if the river reaches or exceeds 23 feet... flooding of Highway
128 approximately 5 miles from Highway 1 will occur.





301 PM PST Wed Nov 28 2012

... Flood Watch in effect from Thursday morning through late
Thursday night...

The National Weather Service in Eureka has issued a

* Flood Watch for a portion of northwest California... including
the following areas... Mendocino coast... Mendocino interior and
upper Trinity River.

* Heavy rain is expected through the day Thursday and Thursday
night with widespread amounts of 2 to 4 inches with 4 to 6
inches in the more prone areas.

* Local street flooding is possible in urban areas. Small streams
may overtop their banks and flood local roads.

Precautionary/preparedness actions...

A Flood Watch means there is a potential for flooding based on
current forecasts.

You should monitor later forecasts and be alert for possible
flood warnings. Those living in areas prone to flooding should be
prepared to take action should flooding develop.
Member Since: October 27, 2012 Posts: 0 Comments: 2026
1. Luisport
11:17 AM GMT on November 29, 2012
Weather Underground‏@wunderground

Navarro River, CA Wednesday stage was 2.9 feet. The river could crest at 26 feet flood stage midday Fri. http://bit.ly/TqFfaT

4 hWeather Underground‏@wunderground

The Navarro River in N. California is expected to rise 23 feet in the next 36 hours. http://bit.ly/TqD2w6
Member Since: October 27, 2012 Posts: 0 Comments: 2026

Viewing: 22 - 1

Page: 1 — Blog Index

Top of Page

About shauntanner

Shaun Tanner has been a meteorologist at Weather Underground since 2004.

Local Weather

Mostly Cloudy
69 °F
Mostly Cloudy