Point St. George to Cape Mendocino CA out 10 NM Marine Forecast
| Rest Of Today...N Wind 20 To 25 Kt. Gusts Up To 35 Kt This Morning. Seas 9 Ft. Wave Detail: N 9 Ft At 9 Seconds And Nw 3 Ft At 12 Seconds. |
| Tonight...Ne Wind 20 To 25 Kt. Seas 8 Ft. Wave Detail: N 8 Ft At 9 Seconds And Nw 4 Ft At 12 Seconds. |
| Sun...Ne Wind 5 To 10 Kt. Seas 5 Ft. Wave Detail: N 5 Ft At 9 Seconds And Nw 2 Ft At 15 Seconds. |
| Sun Night...Ne Wind 5 To 10 Kt. Seas 5 Ft. Wave Detail: N 4 Ft At 5 Seconds And Nw 3 Ft At 9 Seconds. |
| Mon...Ne Wind 5 Kt. Seas 5 Ft. Wave Detail: Nw 3 Ft At 8 Seconds And Nw 3 Ft At 16 Seconds. |
| Mon Night...Ne Wind 5 Kt. Seas 4 Ft. Wave Detail: Nw 3 Ft At 8 Seconds And W 3 Ft At 15 Seconds. |
| Tue...S Wind 5 Kt. Seas 3 Ft. Wave Detail: Nw 2 Ft At 7 Seconds And W 2 Ft At 13 Seconds. |
| Tue Night...E Wind 5 Kt. Seas 3 Ft. Wave Detail: Nw 2 Ft At 7 Seconds And W 2 Ft At 12 Seconds. |
| Wed...S Wind 5 Kt. Seas 4 Ft. Wave Detail: Nw 2 Ft At 7 Seconds And W 3 Ft At 15 Seconds. |
| Wed Night...S Wind 5 To 10 Kt. Seas 4 Ft. Wave Detail: W 4 Ft At 13 Seconds. |
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Area Forecast Discussion National Weather Service Eureka CA 434am PST Sat Jan 25 2025 Synopsis Gusty northerly winds are expected for coastal areas again today. Stronger northeast winds are forecast over the interior mountain ridges and Lake County today through Sunday. Otherwise, dry weather and cold temperatures are expected for this weekend. Isolated light rain and snow showers will be possible in Lake and southern Mendocino Counties this evening and overnight. Widespread rain with snow in mountains is forecast toward the latter portion of next week. A shortwave trough aloft will cut-back across the area today and then form into a closed circulation over central California by this evening. A vorticity spoke will rotate around the northern portion of the closed low by this evening and may generate some light rain and low elevation snow showers for Lake and southern Mendocino Counties. Snow levels will be very low in the colder and drier airmass on the northern side of the low; generally around 1000 to 1500 feet. HREF probabilities for half an inch in 6 hours are less than 20% for places like Cobb and Kelseyville. Impacts will be possible on highways 175 and 20 in Lake County this evening and overnight, though 1/2 an inch is below advisory criteria and confidence is not high precipitation will even occur. Thus will message this potential for light snow accumulation on the roads in a social media post and weather story graphic. Otherwise, northerly winds will increase along the coast again this afternoon and persist into early evening. Overall, this northerly wind surge does not look very strong with very minimal impacts except over the coastal waters and coastal headlands where isolated gusts to 40-45 mph are possible, especially over the exposed terrain around Cape Mendocino. Meanwhile, winds will be generally blustery at lower elevations along the coast with gusts from 25 to 35 mph this afternoon and evening. Winds have shifted to E-NE across the interior overnight with a few ridges gusting to 35-45 mph. Once the cold core aloft heads southward later today, northeasterly winds are expected to ramp up over the higher terrain in the interior. So far only higher elevation sites have been gusting over 45 mph during the night while most lower elevations have been well below advisory criteria. It has gusted to 60 mph at the usual wind-prone PG&E sites in southern Lake; Santa Fe Geothermal. Strong NE winds may mix down to Lake level today as the cold core aloft heads southward and the NE flow becomes stacked through the column up to 500mb. The strong NE winds will persist into tonight, but conditions should stabilize during the day on Sunday and the potential for winds to mix down to Lake level appears to diminish. NBM probability of 24 hr max wind gusts greater than 40 mph indicates there is a 50-60% chance for lowest elevations at Clearlake and Middleton. A wind advisory remains in effect until 10am Sunday. The transient shortwave trough will continue to drive southward and evolve into a closed low over Northern/Central California Saturday into Sunday. This cold core aloft will promote exceptionally dry airmass across the forecast area this weekend, with no rain expected. It will be dry over the weekend into early next week and depending how quickly winds decouple, we will likely have cold weather impacts and freezing or subfreezing temps again. A cold weather advisory remains in effect until 9AM today for apparent temperatures below 30F degrees. Another cold weather advisory may be necessary for tonight. Criteria may be satisfied for apparent temperatures 10F degrees or less for some interior locations as well and this will need to evaluated for a possible extreme cold warning for the interior. Otherwise, weather pattern remains quite and dry early to mid next week. Chances for precipitation will return late in the upcoming work week. NBM indicates increasing probabilities for precipitation Thu-Fri next week. Latest Climate Prediction Center outlook is also showing higher likelihood for above normal precipitation into next weekend and the first days of Feb. DB Marine An area of low pressure off the central California coast will continue to slide slowly southeast toward Southern California today. This low will pull a more potent trough south over the interior of California today. The combination of these two systems, along with strong surface high pressure off British Columbia, is producing a very tight pressure gradient over the coastal waters. Seas have built rapidly in response to the winds and are anticipated to peak around 15 to 18 feet in the outer waters today. Gale warnings are now in effect for both outer water zones through Saturday. Small Craft Advisories are in effect for both inner waters. Winds will be a little lighter south of the Cape within the inner zone but still very strong winds are likely just south of Cape Mendocino and seas will be steep through today. Winds and seas will rapidly diminish Sunday into Monday as the tightest pressure gradient moves west and north of the area. Offshore easterly winds will likely develop Sunday for many areas. Lighter winds and lower seas will then dominate through the middle of the week. /RPA .EKA WATCHES/WARNINGS/ADVISORIES... CA... Cold Weather Advisory until 9am PST this morning for CAZ101>115. Wind Advisory until 10am PST Sunday for CAZ102-105-107-108- 111-114-115. NORTHWEST CALIFORNIA COASTAL WATERS... Small Craft Advisory until 7pm PST this evening for PZZ450- 455. Gale Warning until midnight PST tonight for PZZ470-475. |
Eureka CA Radar
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