Southern California Scorcher: Why March Feels Like Midsummer
Southern California is experiencing an unprecedented March heat wave, shattering records across the region. Many communities saw temperatures soar to levels typically reserved for the height of summer. But what’s driving this unusual warmth?
The Culprit: A ‘Very Tall’ High-Pressure System
According to NBC Los Angeles meteorologist Belen De Leon, a massive, record-strong high-pressure system parked over the Southwest is the primary cause. Unlike typical March high-pressure systems, which are usually weaker and short-lived, this one is exceptionally robust and extending unusually high into the atmosphere.
“The taller and the stronger that high pressure system is, the more air it pushes down,” De Leon explained. “When air sinks, it warms and compresses, leading to rapidly climbing temperatures, especially with clear skies and wall-to-wall sunshine.” The system’s persistence is also a key factor. it’s currently showing no signs of moving.
Record-Breaking Temperatures Across SoCal
Wednesday saw numerous records fall across Southern California. LAX reached 82 degrees, breaking the previous record of 79 degrees from 1988. UCLA hit 87 degrees, surpassing the 84-degree record set in 1978. Other communities experiencing record highs included Idyllwild (87 degrees), Long Beach (91 degrees), Palmdale (92 degrees), Lancaster (93 degrees), Anaheim (95 degrees), Santa Ana (95 degrees), Downtown Los Angeles (95 degrees), Burbank (97 degrees), Riverside (98 degrees) and Woodland Hills (100 degrees).
Idyllwild’s record-breaking temperature also marked the community’s all-time hottest day in March.
Looking Ahead: Thursday and Friday’s Forecast
The heat is expected to peak on Thursday and Friday. Forecasts from NBCLA’s First Alert Forecast predict temperatures reaching 97 degrees in Los Angeles, 99 degrees in Van Nuys, 100 degrees in West Covina, 101 degrees in San Bernardino, 102 degrees in Riverside, and 102 degrees in Lake Elsinore. The Extreme Heat Warning remains in effect until 8 p.m. Friday.
De Leon described Thursday and Friday as “the top of the roller coaster,” with some relief expected over the weekend.
What’s Next? A Slow Return to Normal
While the high-pressure system will shift eastward this weekend, bringing slightly cooler temperatures, De Leon cautions that conditions will remain warmer than usual for this time of year. Next week’s temperatures are expected to be in the upper 80s and low 90s.
FAQ: March Heat Wave in Southern California
- Why is it so hot in March? A record-strong high-pressure system over the Southwest is pushing down warm air and causing temperatures to rise.
- How long will the heat last? The Extreme Heat Warning is in effect until 8 p.m. Friday, but temperatures will remain above average next week.
- What can I do to stay safe? Stay hydrated, seek shade, and avoid strenuous activity during the hottest part of the day.
Pro Tip: Check the forecast regularly for updates and heed any warnings issued by local authorities.
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