Wednesday, February 12, 2025

The Day-By-Day, Play-By-Play Forecast For This Week’s Potent Inbound Rain Storm

A storm system will drench Pasadena and Altadena with several rounds of steady rainfall and possible thunderstorms through Friday, before conditions improve for the weekend.

Forecasters expect persistent rain to begin Wednesday, with rainfall totals building significantly through Thursday when 1 to 2 inches could fall. Gusty south winds up to 20 mph will accompany the heaviest precipitation, with thunderstorms possible late Thursday night into early Friday morning.

The wet weather pattern is predicted to gradually wind down Friday, giving way to partly cloudy skies Friday night and mostly sunny conditions by Saturday when temperatures will climb to around 65 degrees. The break in rainfall offers residents a respite after what could amount to over 3 inches of rain during the three-day stretch.

Here is the latest forecast for Pasadena as of 3:14 a.m. on Wednesday, February 12, from the National Weather Service:

Wednesday: Rain. High near 54. Southeast wind 5 to 10 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

Wednesday Night: Rain. Low around 49. Calm wind becoming east southeast around 5 mph after midnight. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

Thursday: Rain. High near 59. South wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.

Thursday Night: Rain and possibly a thunderstorm before 4am, then showers and possibly a thunderstorm after 4:00 a.m. Low around 46. Southeast wind 10 to 15 mph decreasing to 5 to 10 mph in the evening. Winds could gust as high as 20 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

Friday: Showers, mainly before 10:00 a.m. then a chance of rain after 4pm. High near 59. Chance of precipitation is 80%.

Friday Night: A 30 percent chance of rain before 10:oo p.m. Partly cloudy, with a low around 43.

Saturday: Mostly sunny, with a high near 65.

Saturday Night: Mostly cloudy, with a low around 48.

Sunday: Partly sunny, with a high near 70.

Sunday Night: Patchy fog. Otherwise, mostly cloudy, with a low around 49.

Washington’s Birthday: Patchy fog. Otherwise, mostly sunny, with a high near 70.

Monday Night: Patchy fog. Otherwise, mostly cloudy, with a low around 47.

Tuesday: Patchy fog. Otherwise, mostly sunny, with a high near 70.