textproduct: Los Angeles

SYNOPSIS

19/311 AM.

Dangerously hot temperatures will continue all week. Coastal areas likely peaked Tuesday, while valley and interior areas continue to peak through Friday. Dense coastal fog may develop as early as tonight. Temperatures lower significantly over the weekend, but remain well above normal into next week.

LONG TERM (SUN-WED)

19/221 AM.

After the 5-10 degree drop Saturday along with some possible coastal fog Sunday morning, temperatures will slowly start to increase again starting Monday through the middle of next week. Not expecting temperatures to be as hot as this week, but still 15-20 degrees above normal, with a less than 5% chance of reaching 100 in the valleys.

As for rain chances, the GFS and EC deterministic runs are dry through the 28th, looking at their respective ensembles and ensemble AI projections, rain chances were pushed back to the 29th or 30th of March at the earliest. Even then, projections are still very light in accumulations, and not even close to significant at this time.

AVIATION

19/1209Z.

At 0749Z at KLAX, there was no marine layer. The surface-based inversion top was at 2200 ft with a maximum temperature of 28 C.

High confidence in inland TAFs, low to moderate confidence in coastal TAFS, with lowest confidence south of Point Conception. There is a chance of LIFR- VLIFR FG at KLGB (40%), KLAX (40%), KSMO (35%) KOXR (20%), KCMA (10%), KSBA (10%), KSMX (10%) through 17Z Thursday. There is a 30-50% chance of VLIFR-IFR conds for coastal sites after 03Z Fri, highest confidence south of Pt. Conception.

KLAX...Low to moderate confidence in TAF. There is a 40% chance of 1/4-1/2 FG BKN002 through 17Z Thursday and again after 03Z Fri. Otherwise high confidence in VFR conditions and any east winds staying under 6 knots.

KBUR...High confidence in TAF.

MARINE

19/243 AM.

Conditions are likely to remain below Small Craft Advisory (SCA) levels through at least Friday. There is a very low to low (10-20 percent) chance for brief SCA level winds for the northernmost outer waters this evening. SCA conditions are likely to develop over the weekend across the waters southwest through northwest of the Channel Islands and the nearshore waters along the Central Coast. There is a 60-70 percent of widespread SCA conditions by Saturday evening. There is a low (15-25 percent) chance of GALE FORCE winds, highest from around Point Arguello south to San Nicolas Island.

Areas of dense fog across the southern inner waters this morning will gradually become more widespread through tonight into Friday morning as a shallow marine layer depth will in place over the coastal waters.

LOX WATCHES/WARNINGS/ADVISORIES

CA...Heat Advisory remains in effect until 8 PM PDT Friday for zones 38-87-340-341-343-344-346>350-354-355-362-366-367-549-550. (See LAXNPWLOX). Heat Advisory in effect until 8 PM PDT Friday for zones 38-87-343-344. (See LAXNPWLOX). Extreme Heat Warning in effect until 8 PM PDT Friday for zones 88-342-345-351>353-356>358-368>376-378>380-548. (See LAXNPWLOX). PZ...NONE.