Point St. George to Point Arena between 150 and 250 NM Offshore Forecast
|Tonight...N Winds 15 To 25 Kt. Seas 5 To 9 Ft.|
|Wed...N Winds 10 To 20 Kt. Seas 5 To 9 Ft.|
|Wed Night...N To Ne Winds 10 To 20 Kt. Seas 4 To 7 Ft.|
|Thu...N To Ne Winds 5 To 15 Kt. Seas 4 To 6 Ft.|
|Thu Night...N Winds 5 To 15 Kt. Seas 4 To 5 Ft.|
|Fri...N Winds 5 To 15 Kt. Seas 3 To 5 Ft.|
|Fri Night...N To Nw Winds 5 To 15 Kt, Becoming N To Ne. Seas 3 To 5 Ft.|
|Sat...Ne Winds 5 To 15 Kt. Seas 3 To 6 Ft.|
|Sat Night...N To Ne Winds 10 To 20 Kt, Diminishing To 5 To 15 Kt. Seas 4 To 6 Ft.|
|Sun...N To Ne Winds 5 To 15 Kt. Seas 4 To 6 Ft.|
|Sun Night...N Winds Less Than 10 Kt. Seas 4 To 6 Ft.|
| Area Forecast Discussion|
National Weather Service Eureka CA
306pm PDT Tuesday Oct 27 2020
A very dry air mass combined with breezy conditions will continue to produce locally critical fire weather through this afternoon. Frost will remain a concern in the interior valleys for the next few mornings.
Clear skies and light winds this morning allowed interior valley temperatures to drop into the mid 30s and even the upper 20s across some of the more sheltered locations of Trinity County, with temperatures bottoming out in the upper 30s on the coastal plain. Winds have begun to diminish as a deep upper trough over the Desert Southwest pulls off to the E and the stout ridge over the eastern Pacific shifts closer to the coast. Afternoon highs will generally range from the upper 70s to mid 80s through the remainder of the week. Clear skies and dry conditions will continue to yield frost concerns in the interior valleys for the next couple nigheights as winds decouple and promote optimal radiational cooling conditions. Overnight lows will be just a bit warmer at the coast going into the middle of the week.
Guidance continues to trend drier with respect to rain chances late in the week as a fast moving disturbance temporarily flattens the ridge and treks across the Pacific NW. At best, this looks to provide a few sprinkles for Del Norte County, although the more likely outcome is that we will remain dry into the weekend. The ridge will quickly rebound, keeping the area generally sunny and dry with cold nigheights into the early part of next week. /CB&SEC
High pressure will continue to move closer to the coast, easing the pressure gradient and eventually breaking down the northern wind regime which has been generating the steep seas. However, the northerly winds are beginning to pulse up a final time this afternoon. This will send one more brief round of steeper seas into the Northern Inner waters, with portions mainly in the southern parts of the zone possibly briefly reaching up to 7 feet by 11 pm. Opted to not extend the SCA (Small Craft Advisory) in this zone due to the short duration and isolated coverage, but buoys will need to be monitored for the evening marine package. The outer water seas will slowly subside to below Small Craft Advisory conditions throughout the day on Wednesday. Seas will continue to ease towards the end of the week, with light northerlies and some southerly return flow at times closer to coast. Models are coming into better agreement for Friday, when northerlies look to reinvigorate. A small mid-period NW wave train will move through the waters beginning late Thursday through the weekend of up to 3-4 feet at 10 seconds. Models have been holding on to the arrival of a moderate long-period WNW swell, with 20 second period forerunners potentially trickling in as early as Sunday. If this pans out, this will present a sneaker wave threat, but details may change that far out.
Relative humidities in the teens to single digits coupled with gusty ridgetop winds will continue to drive locally critical fire weather conditions through this afternoon, particularly for locations south of Highway 36. Conditions will improve as winds diminish this evening, although dry conditions will persist through much of the week. /CB
.EKA WATCHES/WARNINGS/ADVISORIES... CA...Frost Advisory from midnight tonight to 8am Wednesday for CAZ105-106-109>111-113. Red Flag Warning until 5pm this afternoon for CAZ201-203-204-211-212-264-276-277-283.
NORTHWEST CALIFORNIA COASTAL WATERS... Small Craft Advisory until 9pm this evening for PZZ450. Small Craft Advisory until 2pm Wednesday for PZZ470. Small Craft Advisory until 6am Wednesday for PZZ475.