Santa Cruz Island to San Clemente Island CA between 60 and 150 NM Offshore Forecast
|Today...N To Nw Winds 5 To 15 Kt, Increasing To 10 To 20 Kt, Then, Becoming Nw 5 To 15 Kt. Seas 4 To 7 Ft.|
|Tonight...Nw Winds 10 To 20 Kt. Seas 5 To 9 Ft.|
|Sat...Nw Winds 10 To 20 Kt. Seas 6 To 11 Ft.|
|Sat Night...Nw Winds 10 To 20 Kt. Seas 6 To 10 Ft.|
|Sun...Nw Winds 10 To 20 Kt. Seas 5 To 9 Ft.|
|Sun Night...W To Nw Winds 10 To 20 Kt. Seas 6 To 10 Ft.|
|Mon...Nw Winds 15 To 25 Kt, Becoming N. Seas 7 To 11 Ft.|
|Mon Night...N To Ne Winds 10 To 20 Kt. Seas 6 To 11 Ft.|
|Tue...N To Ne Winds 10 To 20 Kt, Becoming N To Nw 5 To 15 Kt. Seas 5 To 9 Ft.|
|Tue Night...Nw Winds 5 To 15 Kt. Seas 5 To 8 Ft.|
| Area Forecast Discussion|
National Weather Service San Diego CA
301am PST Fri Jan 27 2023
A trough from the north will influence the weather this weekend with gradual cooling occurring as winds turn onshore. A winter storm will impact Southern California, arriving on Sunday and lasting through Monday night. Significant snow will impact the mountains, heaviest Sunday night through Monday. The storm will depart the region on Tuesday while it remains cold. Gradual warming will occur Wednesday through late next week as an upper ridging builds in from the west.
For Extreme Southwestern California Including Orange... San Diego...Western Riverside and Southwestern San Bernardino Counties
* Winter storm to impact SoCal Sunday through Monday night * Significant snow will impact the mountains, even I-15 and I-8
A longwave trough from the north will dive southward into California from the Pacific Northwest later today through Saturday. Temps will run slightly above normal today, but will trend cooler than normal on Saturday, ahead of a winter storm on the way to arrive Sunday.
A winter storm from the north is set to arrive to the Southland on Sunday with showers on the increase along and west of the mountains. The storm/upper low will move over SoCal by Monday with its associated cold airmass. Shower will continue as snow levels lower. This cold system will result in significant snowfall in the mountains with 6-12 inches likely above 5000 feet. An inch or two of snow is even possible along I-15 and I-8 through the mountain passes as snow levels drop to 3000-3500 feet by Monday, possibly even a tad lower. The storm will even start cold on Sunday with snow levels near 4500 feet, so this storm will have major travel impact in the mountains.
Rounds of scattered showers are expected west of the mountains with rainfall totals reaching 0.25-0.50 inches at most locales by the time the storm is finished. Both GEFS and EPS are clustering around these amounts with not as much spread as we often see, so better confidence on these amounts. This is a different storm than the storms earlier this month with much less moisture present, significantly reducing rainfall amounts, and it is much colder.
The storm will move to our east on Tuesday, but cold air will remain in place. A few showers could linger over San Diego County mountains Tuesday but most of the region will be dry. It will clear out and the coldest morning will likely be Wednesday with the potential for lots of frost over parts of the inland valleys.
An upper ridge looks to begin to move in from the west Wednesday through late next week, leading to dry and warmer conditions.
No hazardous marine weather conditions are expected through the weekend.
NOAA San Diego CA Office: Watches - Warnings - Advisories