San Mateo Point to the Mexican Border from 30 to 60 nm out including San Clemente Island Marine Forecast
|Today...Wind Nw 10 To 15 Kt. Wind Waves 2 Ft Or Less...Becoming 3 Ft In The Afternoon. Swell Nw 3 To 6 Ft At 15 Seconds.|
|Tonight...Wind Nw 10 To 15 Kt. Wind Waves 3 Ft. Swell Nw 3 To 5 Ft At 17 Seconds.|
|Sat...Wind Nw 10 To 15 Kt With Gusts To 20 Kt. Wind Waves 3 Ft. Swell W 3 To 6 Ft At 16 Seconds.|
|Sat Night...Wind Nw 10 To 15 Kt With Gusts To 20 Kt. Wind Waves 3 Ft In The Evening...Becoming 2 Ft Or Less. Swell W 4 To 7 Ft At 15 Seconds.|
|Sun...Wind W 10 Kt. Gusts To 15 Kt In The Morning. Wind Waves 2 Ft Or Less. Swell W 4 To 7 Ft At 14 Seconds.|
|Sun Night...Wind W 10 Kt. Gusts To 15 Kt In The Evening. Wind Waves 2 Ft Or Less. Swell W 4 To 6 Ft.|
|Mon...Wind W 10 To 15 Kt. Wind Waves 2 Ft Or Less... Becoming 3 Ft In The Afternoon. Swell Nw 4 To 6 Ft.|
|Mon Night...Wind Nw 15 Kt With Gusts To 20 Kt. Wind Waves 4 Ft. Swell W 4 To 6 Ft.|
|Tue...Wind W 15 Kt. Wind Waves 3 Ft. Swell Nw 3 To 5 Ft. Slight Chance Of Rain In The Afternoon.|
|Tue Night...Wind W 15 Kt With Gusts To 20 Kt. Wind Waves 3 Ft. Swell Nw 3 To 5 Ft. Chance Of Rain.|
| 206 AM PST Fri Mar 5 2021 |
Synopsis for the far southern California coast - PZZ700
At 1 AM, a 1030 mb high was over central Utah and a 1013 mb low was over the southern Gulf of California. Offshore flow will weaken this morning and onshore flow will strengthen this afternoon, continuing through Tuesday. Some gusts could exceed 20 kt each afternoon and evening especially over the outer waters.
| Area Forecast Discussion|
National Weather Service San Diego CA
439am PST Fri Mar 5 2021
High pressure over the Southwest will bring warm and dry weather today. An incoming trough will move inland to our north, bringing cooler weather and gusty winds in the mountains and deserts. A slow moving low pressure will tread toward the West Coast and bring chances for precipitation Tuesday through Thursday along with even cooler temperatures. Stronger onshore flow will also bring periods of gusty southwest to west winds in the mountains and deserts.
FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES... Short Term
(Today through Sunday)... We are about to witness the warmest day of the week today as a ridge of high pressure noses its way into the American Southwest. Plentiful sunshine and highs in the 70s for many valleys west of the mountains into the high desert with even some lower 80s for locations in the vicinities of Riverside and Palm Springs. A trough pushing inland across the northern part of the State will bring increasing onshore flow and cooling west of the mountains as we get into Saturday. Another day in the 80s across the lower deserts can be expected with highs in the 50s and 60s along and west of the mountains. This system will also bring about gusty west winds to portions of the desert slopes to the desert floor with gusts 30-45 MPH at times. Sunday will see periods of clouds and sunshine with calmer winds and similar temperatures as zonal flow makes a brief visit to the region.
(Monday through Thursday)... Ensemble forecast models are in fair agreement of a large upper level low pressure system pushing south from the Gulf of Alaska toward the West Coast. This system looks rather cold, with daytime highs struggling to reach 60 degrees by the middle of the week. Some ensemble model guidance supports temperatures even colder, so we will have to keep track of this as the time gets closer. Strong west winds will once again be felt from the mountains into the deserts with widespread gusts 35-45 MPH. Tuesday will be the windiest day overall, where gusts from the coast to the inland valleys may reach near 25 MPH.
As for precipitation, the marine layer will deepen with the incoming trough but precipitable water struggles to get to a half inch by Monday, so should stay relatively dry. As the system pushes southward, areas of light showers will push into the region on Tuesday. We can expect the heaviest precipitation to fall Tuesday night into early Wednesday morning. The trough axis will progress slowly over SoCal Wednesday into Thursday, bringing a continued chance for light to moderate showers. In total, much of the coast and western valleys will generally see around one half inch to an inch, with portions of the coastal slopes just over an inch. Some parts of the lower desrts may receive up to one tenth of an inch of rainfall. As for snowfall, snow levels will generally be 3000-4000 feet. Locales above 6000 feet may see 2-5 inches of fresh powder.
Northwest winds could occasionally gust to around 20 knots in the outer waters during afternoons beginning tonight and lasting through mid next week, with a lull on Sunday. Otherwise, no hazardous marine conditions are expected through Tuesday.
.BEACHES... An increased west swell will result in elevated surf and a high rip current risk at the beaches over the weekend. Surf will mainly range from 3-5 feet, with sets to 6 feet possible in southern San Diego County.
.SKYWARN... Skywarn activation is not requested. However weather spotters are encouraged to report significant weather conditions.
.SGX WATCHES/WARNINGS/ADVISORIES... CA...NONE. PZ...NONE.