Page Links Change Location One Page Printer Page HELP AIS Default setup SAVE setting RECALL saved setting

Marine Weather and Tides Mountain Gate, CA Version 3.4

NOTICE 10/9/2019 Updated the Marine Zones. 9/4/2019 Fixed the weather maps due to NOAA moving them. 7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports. 6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

---

Sunrise 7:20AM

Sunset 4:44PM

Tuesday December 10, 2019 4:42 PM PST (00:42 UTC)

Moonrise 3:57PM

Moonset 5:39AM

Illumination 99%

NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.

---

---

7 Day Forecast for Marine Location Near Mountain Gate, CA

   Hourly   EDIT   Help

---

Area Discussion for - Sacramento, CA

      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS66 KSTO 102302 AFDSTO

Area Forecast Discussion National Weather Service Sacramento CA 302 PM PST Tue Dec 10 2019

SYNOPSIS. Rain returns to the region tonight tapering to a few light showers on Wednesday. Widespread precipitation expected later in the week and into the weekend. Drier weather Sunday and early next week.

DISCUSSION. After the morning fog in the Valley, much of the low cloud deck was slow to erode. Now the clouds associated and ahead of the frontal band along the coast are moving into our area and will spread over the Sierra early this evening. It has been a sunny, seasonably pleasant day in the Sierra as the higher elevations were above the fog and well to the east of the advancing cloud deck from the west for most of the day. But that will change this evening.

The frontal system will move into the region, spreading light rain over much of our CWA beginning late this afternoon and continuing into the evening. Radar echoes along the Nrn CA coast this morning are now moving onshore at press time, and the timing of the upper trof suggests the frontal precip should end by Wed morning as the trof moves through our region. Satellite trends suggest a brief period of clearing early Wed morning as the trof passes, followed by an increase in cloud cover during the day. Behind the trof, heights rebuild on Wed as a ridge axis slides across the region. Some light sprinkles or showers are still possible mainly in the Nrn part of our CWA on Wed, where WAA (about 7 deg C/12hr in the 850-700 mbs layer) could result in some light precip.

An increase in precip is forecast over Norcal Wed nite and Thu as a strong 150kt Pac jet south of the GOA (Gulf of AK) low reaches the coast and focuses a +3 PW anomaly into our CWA. The U.S. West Coast AR Tool shows that a "weak" AR (TPW/moisture plume) along 140W will make "landfall" during this time (late on 12/11 and into 12/12). Rising 5H heights will steer the storm track and main dynamics a little farther N and into the Pac NW. But the strong WAA Wed nite and Thu (over 5 deg C/12 hr in the 850-700 mbs layer) will interact with the moisture plume resulting in steady precip over Norcal, mainly over the Nrn mtns and areas N of I-80. An inch or so of precip is forecast over Shasta Co during this time, with amounts tapering off rapidly Swd to the I-80 corridor. South of I-80, only a few hundredths are expected as the storm track shifts Nwd.

Looks as if it will be a little wetter in our CWA on Fri from earlier forecasts as 5H heights begin to fall slowly as the GOA trof emerges from its source region. This will keep the TPW plume over our CWA through the day. Comparing our QPF with the ECMWF ensembles we are generally a little low/light on the QPF and we made a last minute upward adjustment this afternoon . but still we may be a little too light. The bulk of the precip is still forecast over the Sierra.

Snow levels will be rising Wed nite and Thu to 8Kft or so limiting winter travel impacts, until they lower below the passes Fri nite. JHM

EXTENDED DISCUSSION (Saturday THROUGH Tuesday).

By Saturday morning expect ongoing precipitation mainly over the mountains and foothills, although a few lingering showers may be possible in the Valley. Snow levels will range from 4-5kft Saturday, although snowfall accumulations themselves will only be a few inches. Some minor mountain travel impacts are anticipated Saturday due to this lingering precipitation. Models have trended a bit later to bring dry weather back to the area, as a few light lingering snow showers will be possible through Sunday morning.

Upper level ridging builds into the area Sunday and Monday. Mostly clear skies and average temperatures are expected early next week. Ensemble guidance shows the potential for another system to impact NorCal Tuesday, although confidence with this system remains low at this time.

AVIATION.

Deteriorating conditions expected as a system moves across northern California tonight. Light rain is expected at RDD/RBL between 04-06Z, spreading south towards Sacramento terminals shortly after. MVFR/IFR conditions likely overnight at these sites, with possible LIFR conditions returning to southernmost terminals.

STO WATCHES/WARNINGS/ADVISORIES. None.

---

Weather Reporting Stations

   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map

Stations	Dist	Age	Wind	Air Temp	Water Temp	Waves	Pressure	DewPt
HBYC1 - 9418767 - North Spit, CA	99 mi	67 min			53°F		1019.5 hPa

Wind History for North Spit, Humboldt Bay, CA

(wind in knots)    EDIT      (on/off)   Help

Last 24hr

1 day ago

2 days ago

---

Airport Reports

    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.

Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
Redding Municipal Airport, CA	18 mi	50 min	N 0	10.00 mi	Mostly Cloudy	52°F	43°F	72%	1023.1 hPa

Link to 5 minute data for KRDD

Wind History from RDD (wind in knots)

5 PM

6 PM

7 PM

8 PM

9 PM

10 PM

11 PM

12 AM

1 AM

2 AM

3 AM

4 AM

5 AM

6 AM

7 AM

8 AM

9 AM

10 AM

11 AM

12 PM

1 PM

2 PM

3 PM

4 PM

Last 24hr

Calm

Calm

N4

W3

N4

Calm

NW3

Calm

Calm

Calm

W3

E4

W6

Calm

E5

Calm

Calm

Calm

Calm

Calm

Calm

Calm

Calm

Calm

1 day ago

Calm

Calm

N3

Calm

NW5

NW3

Calm

N3

NE3

NW5

NW5

3

Calm

NE3

NE3

N3

SE3

Calm

Calm

Calm

E4

SE5

SE7

SE5

2 days ago

6

S18 G23

S17 G25

S17

S15 G24

S20 G27

S19 G26

S18

S9

SW8

S8

SW6

SW5

SW4

W4

W3

W4

Calm

SE4

E3

N3

Calm

Calm

SW3

---

Tide / Current Tables for Arcata Wharf, Humboldt Bay, California

   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data

---

Tide / Current Tables for Eureka Slough Bridge, Humboldt Bay, California

   EDIT      (on/off)   Help   One Week of Data

---

Weather Map

       (on/off)   Help Weather Map

---

GEOS Local Image of CentralWestCoast    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East

---

Wind Forecast for Sacramento, CA (19,4,5,8)

      (on/off)   Help

---

Ground Weather Radar Station Beal AFB, CA

   (on/off)   Help

---

Cookie Policy: This webiste uses cookies to save your settings. No personal information is saved. You can disable cookies in your browser if you like but it is not recommended for this site. I do not sell cookies. Go to a bakery for that. In fact I do not sell anything. To disable cookies from L-36.com, please refer to the Help button in your browser. Privacy Policy: I do not sell or share any user data or anything else for that matter. I do not keep site logs longer than I need to to keep bad actors off the site. Basically, I delete them after looking at them. If you are subject to CCPA, Google ads on this site will not be based on your past behavior so you will likely not see an ad for a lawn mower just because you looked for one at a big box website. I do not believe this site is subject to CCPA but I am doing what I can to follow the guidelines anyway. Disclaimer: The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.