San Mateo Point CA to the Mexican Border and out 30 NM Marine Forecast
|Tonight...Wind Nw 10 To 15 Kt...Becoming Ne After Midnight. Wind Waves 2 Ft Or Less. Swell W 3 To 4 Ft At 13 Seconds.|
|Fri...Wind S 10 Kt...Becoming W In The Afternoon. Wind Waves 2 Ft Or Less. Swell W 2 To 3 Ft At 14 Seconds.|
|Fri Night...Wind S 10 Kt In The Evening...Becoming Variable Less Than 10 Kt. Wind Waves 2 Ft Or Less. Swell W 2 To 4 Ft At 13 Seconds.|
|Sat...Wind Variable Less Than 10 Kt...Becoming W 10 Kt In The Afternoon. Wind Waves 2 Ft Or Less. Swell W 3 To 4 Ft At 12 Seconds.|
|Sat Night...Wind Se To 10 Kt...Becoming Ne After Midnight. Wind Waves 2 Ft Or Less. Swell W 3 To 4 Ft At 13 Seconds.|
|Sun...Wind Ne 10 To 15 Kt...Becoming Nw In The Afternoon. Gusts To 20 Kt. Wind Waves 4 Ft. Swell Nw 3 To 4 Ft.|
|Sun Night...Wind N 10 Kt...Becoming Ne After Midnight. Gusts To 15 Kt. Wind Waves 2 Ft Or Less...Becoming 3 Ft After Midnight. Swell Nw 2 To 3 Ft.|
|Mon...Wind Variable Less Than 10 Kt. Wind Waves 2 Ft Or Less. Swell W 2 To 3 Ft.|
|Mon Night...Wind W 10 Kt. Wind Waves 2 Ft Or Less. Swell W 2 Ft.|
|Tue...Wind W 10 Kt With Gusts To 15 Kt. Wind Waves 2 Ft Or Less...Becoming 3 Ft In The Afternoon. Swell W 2 To 3 Ft. Slight Chance Of Showers In The Afternoon.|
|Tue Night...Wind Nw 10 Kt With Gusts To 15 Kt. Wind Waves 2 Ft Or Less. Swell W 2 To 3 Ft. Slight Chance Of Rain In The Evening.|
| 124 PM PST Thu Feb 25 2021 |
Synopsis for the far southern California coast - PZZ700
At 2 PM, a 1029 mb high was over northern Nevada and a 1018 mb low covered the Southern California coastal waters. Isolated breezy winds over 20 kts will be possible this afternoon, mainly from Camp Pendleton to San Clemente Island. Winds will turn to the northwest late this afternoon and evening. A weak coastal eddy is expected Friday into Saturday. Stronger northeast offshore winds are expected again Saturday night into Sunday, weakening Monday.
| Area Forecast Discussion|
National Weather Service San Diego CA
934pm PST Thu Feb 25 2021
Friday will be a sunny, mild day. A Catalina Eddy will form over the coastal waters Friday and it will spin up low clouds near the coast Friday night into Saturday. Saturday will be a little cooler as the marine layer deepens and the onshore flow increases ahead of an approaching trough. After the trough passes Saturday evening, strong northeast winds will once again impact the mountains and foothills through Sunday. Monday will be dry. There is a chance for light precipitation Tuesday and Wednesday.
FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES... Evening Update:
The Santa Ana wind event was a strong one, as highlighted on the wind report issued earlier this afternoon, and headlined on social media and our website. Otherwise quiet weather will be expected for the remainder of tonight, and into Friday. Onshore flow late Friday will bring in marine enhanced air to the coastal strip and patchy fog. No changes were necessary this evening.
Remainder of the previous forecast discussion, issued at 240pm PST:
Santa Ana winds peaked this morning with gusts above 70 mph at the wind prone areas in San Bernardino and Orange County Mountains. Marshall Peak in the San Bernardino Mountains had a gust to 98 mph, and CSU San Bernardino had a gust to 81 mph. Several big rigs were overturned on the I-15 and I-210 below the Cajon Pass. Winds also gusted to 58 mph at Desert Hot Springs last night.
The winds will decrease this afternoon as gradients weaken. Friday will be a little warmer than today in most areas. A Catalina Eddy is forecast to spin up Friday night which will deepen the marine layer and spread low clouds and fog into the coastal zones Saturday morning, perhaps as far inland as the western San Diego Valleys. Saturday will be a cooler day with lower heigheights and stronger onshore flow associated with a fairly strong inside slider racing across the Great Basin and into Arizona Sunday.
Gradients turn quickly offshore Saturday night and that will bring in another round of Santa Ana winds Saturday night and Sunday. This Santa Ana event won't be a strong today's, but it will still generate northeast winds from 40-60 mph in the mountain and foothills, and that may require a High Wind Watch or Wind Advisory. Sunday will be a colder day is all areas. Marine layer clouds and fog in San Diego County Sunday morning will slowly erode as the drier offshore flow make its way southwestward.
Monday will be a dry and warmer day with generally sunny skies and weaker offshore flow.
The Tuesday and Wednesday outlook is a murky as it was yesterday. All of the deterministic and the ensemble runs continue to show a large model spread next week. The variability ranges from dry and warm with ridging (ECMWF) to wet and cool troughing (GFS). The Canadian model is also supporting and cooler, wetter solution. Forecast confidence remains very low for this time period.
No hazardous marine weather expected tonight through Saturday. Northeast winds expected starting early on Sunday morning through Sunday night with some gusts over 20 knots possible.
.SKYWARN... Skywarn activation will not be needed Friday.
.SGX WATCHES/WARNINGS/ADVISORIES... CA...None. PZ...None.