Tonight: Patchy fog after 2am. Mostly cloudy, with a low around 40. North wind 1 to 7 mph.
Mostly Cloudy then Patchy Fog
Fri10/30Low 41°High 61°
Friday: Patchy fog before 11am. Partly sunny. High near 61, with temperatures falling to around 57 in the afternoon. North northeast wind around 3 mph.
Friday Night: Mostly cloudy, with a low around 41. Northeast wind around 2 mph.
Patchy Fog then Partly Sunny
Sat10/3152% chance of precipitationLow 39°High 57°
Saturday: A chance of rain after 11am. Mostly cloudy, with a high near 57. South southeast wind 0 to 3 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
Saturday Night: A chance of rain before 4am, then patchy fog. Mostly cloudy, with a low around 39. North wind around 2 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
Chance Light Rain
Sun11/1Low 40°High 59°
Sunday: Patchy fog before 7am. Sunny, with a high near 59. North wind 1 to 6 mph.
Sunday Night: Partly cloudy, with a low around 40.
Patchy Fog then Sunny
Mon11/2Low 42°High 67°
Monday: Partly sunny, with a high near 67.
Monday Night: Mostly cloudy, with a low around 42.
Partly Sunny
Tue11/314% chance of precipitationLow 44°High 67°
Tuesday: Mostly sunny, with a high near 67.
Tuesday Night: Partly cloudy, with a low around 44.
Mostly Sunny
Wed11/431% chance of precipitationLow 45°High 66°
Wednesday: A slight chance of rain after 4pm. Mostly sunny, with a high near 66.
Wednesday Night: A chance of rain. Mostly cloudy, with a low around 45.
Mostly Sunny then Slight Chance Light Rain
Thu11/526% chance of precipitationLow High 64°
Thursday: A chance of rain. Partly sunny, with a high near 64.
* Dry weather through Friday with light rain likely for Saturday.
* Frost and freezing overnight temperatures again tonight.
* More rain possible Wednesday
Synopsis
Dry weather is expected to continue through Friday. A weak weather system is expected to bring some light rain on Saturday. Dry and warmer weather is expected Sunday through Tuesday with more rain possible Wednesday.
Discussion
An upper level trough over the west coast continues to bring near or slightly below normal temperatures to the area this afternoon. Tonight some near freezing or freezing temperatures are expected once again. Some fog is possible in the valleys, likely in similar locations to this morning. An approaching system on Friday may bring a few more clouds and some cooler air aloft. This will keep inland temperatures a bit cooler than today.
Friday night into Saturday is expected to see a weak weather system bring some light rain showers to much of of the area. The potential for rain looks higher in the afternoon in most areas. Rainfall amounts are expected to be less than a tenth to a quarter of an inch. Snow levels are expected to be around 5,000 feet with this system making it one of the colder weather systems so far this season.
Sunday morning the rain is expected to come to an end. Widespread low clouds and possibly fog in the valleys is expected to keep the valleys from getting too cold. High temperatures are expected to only be in the mid 50s to low 60s on Sunday. High pressure starts to build in on Monday and highs in the mid to upper 60s are expected in the interior. Shady areas will likely remain notably cooler. This warmer and dry weather is expected to continue into Tuesday. Nights will be chilly, especially Monday morning in areas that clear out. Tuesday morning may be warmer in some areas, but also drier and there may be less clouds around.
Wednesday is the next chance for rain. The ensemble clusters do all show some rain for Wednesday, but it generally looks fairly light. A few of the clusters even have some rain on Tuesday. The clusters are in better agreement that a stronger system is expected Thursday. This does look like better agreement than we have been seeing, but it still may push out slightly farther as we get closer. We will continue to monitor. MKK
Aviation
An upper level trough is bringing some high clouds, but otherwise VFR conditions continue. The upper level is expected to persist through Saturday. Today and Friday the cooler temperatures are expected to keep the marine inversion weaker and some offshore is expected to keep low clouds away. A few clouds are possible along the coast in the morning. Friday evening or Friday night some low clouds are expected as a frontal boundary starts to approach the area and bring some light rain in. MKK
Marine
Northerly winds continue to diminish in the southern waters. There is also a northwest swell of around 7 to 8 feet at 11 seconds and this is expected to slowly diminish as well. The model is also showing a small southerly swell at 15 seconds, but this is not showing up in the buoy reports at this time. Light winds are expected Friday and Saturday as weak weather system moves through and brings some light rain on Saturday.
Sunday high pressure is expected to start building back into the area and bringing strong northerly winds. These are expected to be short-lived with light winds returning by Monday and continuing into Tuesday. Wednesday or Thursday the models are starting to show more persistent and stronger southerly winds with the next weather system. This will need to be watched as it gets closer. MKK
Coastal flooding
Water levels Thursday reached 9.0 ft above MLLW at the North Spit. This brought some minor flooding to low lying areas of King Salmon and the Arcata bottoms. This was with an anomaly of about 1.1 foot above astronomical tides. The surge models are showing a slightly higher anomaly during the high tide Friday (at 2:51 PM), and with an astronomical tide of 7.50 ft, this would again push levels around 8.6 or 8.7 ft. A Coastal Flood Advisory may be needed for the high tide on Friday.
Watches, warnings and advisories
CA: Frost Advisory from 1 AM to 10 AM PDT Friday for CAZ103-105- 106-110-111-114.
Coastal Flood Advisory until 4 PM PDT this afternoon for CAZ103.
NORTHWEST CALIFORNIA COASTAL WATERS: Small Craft Advisory until 9 PM PDT this evening for PZZ475.
From the National Weather Service; may be delayed. Not for life-safety decisions. In an emergency, call 911.
Next 6 hours
NWS hourly forecast
Now54°Cloudy1%7 mph
8 PM51°Cloudy1%3 mph
9 PM49°Cloudy1%3 mph
10 PM48°Cloudy1%3 mph
11 PM47°Partly Cloudy1%2 mph
12 AM45°Partly Cloudy1%2 mph
Hourly details
Next 7 days: temperature chart, feels like, rain and snow amounts, sky cover, wind and gustsShowHide
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