textproduct: Los Angeles

SYNOPSIS

05/127 AM.

A moderate to strong northerly wind event will impact the region through today, then winds will turn to the northeast Friday morning into a traditional moderate to strong Santa Ana Wind event that will continue through Sunday. An overall warming trend will continue through the weekend, with widespread highs in the 80s by Sunday.

LONG TERM (SUN-WED)

05/200 AM.

As the timing of the movement of the upper low has slowed some, so has the expected timing for this pesky low to exit the region. Monday will be somewhat of a transition day. The Pacific Ridge will begin nudging the low eastbound and surface gradients are expected to rapidly shift from offshore towards neutral, likely becoming onshore to the north and east by the afternoon. Coastal areas will likely cool under the marine influence, but coastal valleys and interior areas are a bit trickier depending on the timing and strength of the winds. Quicker timing and stronger onshore flow will favor cooling of coastal valleys and warming of the interior (due to downsloping winds). Widespread cooling is expected Tuesday and temps will dip into the 60s and 70s everywhere. The increasing strength of the ridge will allow for some dramatic warming Wednesday.

AVIATION

05/1236Z.

At 12Z at KLAX, there was no marine layer nor inversion.

Low to moderate confidence in all TAFs due to strong offshore winds. Wind group changes may be off +/- 3 hours and gusts up to 10 kt less at any point when forecast. Mdt LLWS due to increasing winds with height possible at all sites except KPRB and KSBP. Highest confidence for KSBA, KLAX, KSMO, KBUR focused through 18Z. Mdt turbulence also likely, especially over terrain.

KLAX...Low to moderate confidence in TAF due to north winds. Lower confidence in peak wind gusts, but higher confidence in timing being between 10Z and 18Z. LLWS likely due to wind speeds rapidly increasing with height through 18Z (+/- 3 hours).

KBUR...Moderate confidence in TAF. LLWS possible due to wind speeds rapidly increasing with height through 18Z (+/- 3 hours).

MARINE

05/808 AM.

Periods of hazardous marine conditions are expected through the weekend. Gusty winds will continue across all the waters through this morning, with steep, choppy, Small Craft Advisory (SCA) level seas. GALEs will continue across the outer waters through late tonight before dropping to near advisory levels through Friday. The SCA level seas will slowly subside over the day Friday.

Each night through morning Friday through Sunday, there is a 30-40 percent of GALE Force NE wind gusts across the waters inside the southern California bight, and a 40-50 percent chance of SCA level winds along the nearshore waters of the Central Coast.

LOX WATCHES/WARNINGS/ADVISORIES

CA...Wind Advisory now in effect until noon PST today for zones 87-366-367. (See LAXNPWLOX). Wind Advisory in effect until noon PST today for zones 88-362-369>380. (See LAXNPWLOX). PZ...Small Craft Advisory in effect until noon PST today for zones 645-650-655. (See LAXMWWLOX). Gale Warning in effect until 3 AM PST Friday for zones 670-673-676. (See LAXMWWLOX).