Santa Cruz Island CA to 120W between 150 and 250 NM Offshore Forecast
|Today...Nw Winds 15 To 20 Kt, Diminishing To 10 To 15 Kt. Seas 5 To 7 Ft.|
|Tonight...N To Nw Winds 10 To 15 Kt. Seas 5 To 6 Ft.|
|Mon...N To Nw Winds 10 To 15 Kt, Becoming 10 To 20 Kt. Seas 5 To 6 Ft.|
|Mon Night...N To Nw Winds 10 To 15 Kt. Seas 5 To 6 Ft.|
|Tue...N Winds 10 To 15 Kt. Seas 5 To 6 Ft.|
|Tue Night...N Winds 10 To 15 Kt. Seas 5 To 6 Ft.|
|Wed...N Winds 10 To 20 Kt. Seas 5 To 7 Ft.|
|Wed Night...N Winds 10 To 20 Kt. Seas 5 To 7 Ft.|
|Thu...N To Nw Winds 10 To 20 Kt. Seas 5 To 9 Ft.|
|Thu Night...N To Nw Winds 15 To 25 Kt. Seas 7 To 11 Ft.|
| 207 AM PDT Sun Sep 20 2020 |
Synopsis for the far southern California coast - PZZ700
At 1 AM, a 1025 mb high was 1,450 miles west of Point Conception, and a 1003 mb low was near Lake Havasu. Generally weak northwest flow will prevail through the middle of the week, except locally stronger winds gusting around 20 knots through this evening in the outer waters.
| Area Forecast Discussion|
National Weather Service San Diego CA
230am PDT Sunday September 20 2020
A weak trough over the west will bring seasonally warm weather through Tuesday. Marine layer clouds will extend as far inland as the western valleys each night before retreating back to the coast each morning. Much warmer weather returns Wednesday and Thursday as high pressure rebuilds over the Southwest. A weak trough will bring minor cooling again next weekend.
FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES... The marine layer influence was felt in the coastal zones Saturday where temperatures were 7-12 degrees lower than they were on Friday. Farther inland the valleys were 5-10 degrees lower, and the mountains and deserts were 3-5 degrees lower. This downward temperature trend will continue today with another 3-5 degrees of anticipated cooling. The marine layer was 1,000 feet deep this morning and low clouds extended as far inland as Spring Valley and Fallbrook in San Diego County, and Laguna Niguel in Orange County.
Weak troughing aloft will persist over the Southwest through Tuesday and that will keep temperatures much more moderate than they have been lately, closer to seasonal norms. Low clouds will extend as far inland as the western valleys each night before retreating back to the coast each day. This onshore pattern will result in breezy afternoons in the mountains and deserts.
On Tuesday, a weak short wave passes by to the east. In its wake, a ridge over the eastern Pacific ridge will build into Southwest for warmer days and a shallower marine layer. A hint of offshore flow develops on Wednesday and Thursday. Downslope warming into the Inland Empire could push temps back close to 100 degrees on Thursday.
The long range outlook for next Friday through Sunday shows a series of Pacific shortwaves breaking down the upper ridge and bringing back onshore flow, a deeper marine layer and cooler weather next weekend.
Periods of northwest winds gusting to around 20 kt this evening in portions of the outer waters, mainly near San Clemente Island. Otherwise, no hazardous marine conditions are expected through Thursday.
.SKYWARN... Skywarn activation will not be needed today.
.SGX WATCHES/WARNINGS/ADVISORIES... CA...NONE. PZ...NONE.