Temperatures Drop, Rain Arrives

Rainy, cold conditions moved into Pasadena early Friday morning and are expected to persist through Saturday.

The conditions will be driven by two weather systems bearing down on the region — the first expected to bring inclement weather Friday, along with a slight chance of thunderstorms.

Meanwhile, a second, colder system will move in Saturday and continue into the evening, bringing “another chance of showers to the area.”

Rainfall totals Friday are expected to be relatively low, with most areas receiving a quarter- to three-quarters of an inch of rain, forecasters said.

There will be a slight chance of thunderstorms developing, possibly resulting in localized “brief heavy downpours and small hail.”

Forecasters said the temperatures will average about 10 degrees below normal. Friday and Saturday are expected to reach only 58 degrees in  Pasadena.

Forecasters said conditions should begin to rebound on Sunday with clear skies. Warmer weather is expected to return by Monday with a 10-degree jump in the forecast.

Here is a detailed forecast:

Friday: Showers and possibly a thunderstorm before 10 am, then a chance of showers. High near 58. Southwest wind 5 to 10 mph, with gusts as high as 15 mph. The chance of precipitation is 80%.

Friday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 49. South southeast wind 5 to 10 mph.

Saturday: A 40 percent chance of showers, mainly before 4 pm. Partly sunny, with a high near 58. Northwest wind 10 to 15 mph becoming west southwest in the morning. Winds could gust as high as 20 mph.

Saturday Night: A 20 percent chance of showers before 10 pm. Partly cloudy, with a low around 42. West northwest wind 10 to 15 mph.

Sunday: Sunny, with a high near 63.

Sunday Night: Clear, with a low around 41.

Monday: Sunny, with a high near 68.

Monday Night: Mostly clear, with a low around 44.

Tuesday: Sunny, with a high near 72.

Tuesday Night: Mostly clear, with a low around 46.

Wednesday: Sunny, with a high near 71.

Wednesday Night: Mostly clear, with a low around 46.

Thursday: Sunny, with a high near 73.