Area Forecast Discussion
Issued by NWS Los Angeles, CA
Issued by NWS Los Angeles, CA
Versions:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
127 FXUS66 KLOX 060336 AFDLOX Area Forecast Discussion National Weather Service Los Angeles/Oxnard CA 836 PM PDT Sun May 5 2024 .SYNOPSIS...05/836 PM. A cold storm system has shifted east today, leaving cooler temperatures and gusty west to northwest winds. A warming trend will begin Monday and continue through Wednesday, then little change into next weekend. Gusty northerly winds are expected at times, especially in the mountains and in southern Santa Barbara County. && .SHORT TERM (SUN-WED)...05/836 PM. The storm has passed but it has left behind some cool and blustery winds across the region today, especially near the coast as well as the mountains and Antelope Valley. These areas have generally seen wind gusts in the 35 to 45 mph range, with some isolated gusts to around 50 mph in the mountains. Winds are expected to diminish below advisory levels for coastal areas and the Antelope Valley by 9 pm this evening, and for remaining areas by 3 am. however, gusty northerly flow will continue across the area through mid week and chances are high that wind advisories will be needed most of if not all days, at least for the late afternoon and overnight hours across southern Santa Barbara County and possibly in the I5 corridor as well. Wind sheltered areas will experience a cool night, with some interior valleys dropping into the mid 30s to lower 40s. Temperatures will turn warmer Monday (especially inland) as heights rise and the northerly offshore flow creates some downslope warming. This will also either eliminate or at least minimize any marine layer return. High temps should creep back into the lower 80s across the warmer valleys by Tuesday, with a few degrees of additional warming inland on Wednesday. Not quite as warm at the coast which, despite the light offshore flow, will still get a decent sea breeze each afternoon. And with ocean temps still mostly in the high 50s, that sea breeze will cut into the temperatures quite a bit near the coast. .LONG TERM (THU-SUN)...05/200 PM. Still a fair amount of uncertainty for the end of the week into next weekend, though the only impacts would potentially be cooler temperatures than currently forecast and likely a faster return of the marine layer. Deterministic models are favoring a low pressure system dropping into the northern Rockies Wednesday and then retrograding back to the Great Basin Thu-Sat. However, model clusters are mixed but with more solutions favoring a continued warmer pattern with ridging along the West Coast. There should at least be a light onshore trend for the latter half of the week that should nudge temperatures slowly downward. If some of these deeper trough solutions pan out temperatures would be several degrees cooler than expected. But no rain is is expected this week or for the foreseeable future. && .AVIATION...06/0253Z. At 0018Z at KLAX, there was no marine layer. The top of the inversion was at 1000 ft with a temperature of 16 C. Moderate to high confidence in TAFs. Timing of wind changes could be off by +/- 2 hours, and +/- 5 kt gusts. There is a 10-20% chance of IFR- VLIFR conds for KPRB and KSMX 08Z-17Z, and 20% chance of MVFR cigs at KSMO, KLAX, KLGB, and KVNY 10Z-16Z. Gusty W to NW winds will affect much of the region thru early tonight with areas of LLWS, turbulence and mdt UDDF. KLAX...Moderate confidence in TAF. There is a 10-20% chance of bkn018-025 cigs 10Z-16Z Mon. There is a 20% chance of northerly cross winds to 12-18 kt through 07Z, and a 20% chance of an E wind component of 7-8 kt 08Z-17Z Mon. KBUR...Moderate confidence in TAF. There is a 10-20% chance of bkn018-025 cigs 10Z-16Z Mon. There is a 30% chance of NW wind gusts to 25 kt through 04Z Mon and again 16Z-02Z Mon. && .MARINE...05/827 PM. In the Outer Waters, moderate to high confidence in the forecast. In the southern two zones (PZZ673/676), Gale force winds will continue through tonight. Elsewhere and otherwise, Small Craft Advisory (SCA) level winds (and seas at times) are expected thru Wed night, with a 40% chance of SCA conds (mainly seas) continuing Thu. There is a 20% chance of Gale Force wind gusts across the waters south of Point Sal on Mon afternoon into Mon night, and a 50% chance for all outer waters Tue afternoon into Tue night. Winds and seas should remain below SCA levels Thu night thru Sat morning. For the Inner Waters N of Pt. Sal, moderate to high confidence in the forecast. Thru Wed night, winds are expected to reach SCA levels during the afternoon/eve hours. Seas may remain at or above SCA levels Mon night thru Wed morning, even when the winds decrease. Then, conds should remain below SCA levels Thu night thru Sat morning. In the Inner Waters S of Pt. Conception, moderate confidence in the forecast. Expect Gale force winds to continue tonight across the western portion of the Santa Barbara channel. Otherwise, look for SCA level winds to continue tonight across eastern portions of the channel and zone 655. SCA conds are likely (70% chance) across the Western SBA Channel during the late afternoon thru late night hours Mon and Tue, with a 30-40% chance of SCA conds during these times in the eastern portion of the SBA Channel and western portions of the southern inner waters. && .LOX WATCHES/WARNINGS/ADVISORIES... CA...Wind Advisory remains in effect until 9 PM PDT this evening for zones 87-340-341-346>348-354-355-362-366-381-383. (See LAXNPWLOX). Beach Hazards Statement in effect until 10 PM PDT this evening for zones 87-354-362-366. (See LAXCFWLOX). Wind Advisory remains in effect until 3 AM PDT Monday for zones 349>353-376>378. (See LAXNPWLOX). PZ...Small Craft Advisory in effect until 9 PM PDT this evening for zone 645. (See LAXMWWLOX). Small Craft Advisory in effect from 3 PM to 9 PM PDT Monday for zone 645. (See LAXMWWLOX). Gale Warning in effect until 3 AM PDT Monday for zones 650-673-676. (See LAXMWWLOX). Small Craft Advisory in effect until 3 AM PDT Monday for zones 655-670. (See LAXMWWLOX). && $$ PUBLIC...Gomberg/MW AVIATION...Phillips/Lund MARINE...Gomberg/Lund SYNOPSIS...MW weather.gov/losangeles Experimental Graphical Hazardous Weather Outlook at: https://www.weather.gov/erh/ghwo?wfo=lox