textproduct: Los Angeles

SYNOPSIS

21/301 AM.

High pressure aloft building in over the region will bring a warming trend into early next week. While temperatures will remain below normal today, temperatures above seasonal normals will develop by Sunday. A storm system will move into northern California during next week. Most of the area will likely remain dry. The highest chances of precipitation will be for San Luis Obispo County between Tuesday and Wednesday.

LONG TERM (TUE-FRI)

21/301 AM.

Across the forecast ensembles, good agreement exists through Tuesday for a warming trend to persist. Temperatures will be well above normal, touching the low 80s in some spots on Monday and Tuesday. The ridge will likely amplify due to the atmospheric river type storm system moving farther to the north and allow for a warmer air mass to develop. Rain chances from late Monday through Wednesday will likely be limited to northern San Luis Obispo County as the atmospheric river sags south. EPS ensembles suggest a high chance of rain for K87Q, while GEFS and CMC ensembles lean drier. NBM values remain in the long term due to forecast uncertainty. While onshore flow will likely bring some cooling for Tuesday and Wednesday, there is a moderate to high of chance of a further warming trend develop for Thursday and Friday with weak offshore flow. Winds look to remain on the weak side, except for some breezy northerly winds on Tuesday night and Wednesday night.

AVIATION

21/1212Z.

At 0934 at KLAX, no inversion and no marine layer were present.

High confidence in TAFs with VFR conditions and light winds through the period. There is a 20% chance of VLIFR conds at KPRB after 08Z, and a 20% chance of MVFR/IFR cigs for KSBP and KSMX after 09Z.

KLAX...High confidence in VFR TAF. There is a 10% chance of an east wind component reaching 6 kt from 15Z-20Z Sat.

KBUR...High confidence in VFR TAF.

MARINE

21/117 AM.

For the Outer Waters, moderate to high confidence in current forecast. Today there is a 40-60% chance of SCA level southerly winds in the late afternoon and overnight hours, highest across PZZ670. Moderate confidence in conditions remaining below SCA levels Sunday and Monday, then NW winds are expected to increase Tuesday.

For the Inner Waters north of Point Sal, moderate confidence in conditions remaining below SCA levels through Tuesday.

For the Inner Waters south of Point Conception, high confidence in conditions remaining below SCA levels through Tuesday.

LOX WATCHES/WARNINGS/ADVISORIES

CA...Freeze Warning remains in effect until 9 AM PST this morning for zones 38-381-382. (See LAXNPWLOX). Frost Advisory remains in effect until 9 AM PST this morning for zones 88-357-358-371-372-374-375. (See LAXNPWLOX). Frost Advisory in effect until 9 AM PST this morning for zones 347-348. (See LAXNPWLOX). PZ...Small Craft Advisory in effect from 3 PM this afternoon to 3 AM PST Sunday for zone 670. (See LAXMWWLOX).