Stormy Weather to Sweep Through Pasadena Sunday

A period of stormy weather will bring widespread moderate to heavy rainfall to Pasadena through Sunday afternoon, National Weather Service forecasters said, issuing a flash flood watch and saying locals should expect breezy conditions.

The rainfall totals during this time are expected to be 1-2 inches in the San Gabriel Valley, according to the NWS.

The foothills and mountains are expected to receive 3-6 inches of rain with rain rates of 0.50-1 inch per hour. Some favored mountain slopes exposed to strong south winds may see rainfall up to 8 inches. This will result in potential flooding in many areas, including low-lying areas, low water crossings, and small streams. 

Sunday night into Monday, forecasters expect diminishing rain but predict Pasadena will likely see showers and possibly a thunderstorm before 10 am. 

Here is the detailed NWS forecast for Pasadena:

Today: Rain before 10 a.m., then a chance of showers between 10 a.m. and 4 p.m. The rain could be heavy at times. High near 56. Breezy, with a west southwest wind 20 to 25 mph decreasing to 10 to 15 mph in the afternoon. Winds could gust as high as 35 mph. Chance of precipitation is 100%.

Tonight: A chance of showers and thunderstorms between 10 p.m. and 4 a.m., then showers likely and possibly a thunderstorm after 4am. Mostly cloudy, with a low around 42. South wind around 5 mph. Chance of precipitation is 60%.

Monday: Showers likely and possibly a thunderstorm before 10 a.m., then a chance of showers. Mostly cloudy, then gradually becoming sunny, with a high near 53. Southeast wind around 5 mph becoming northwest in the afternoon. Chance of precipitation is 70%.

Monday Night: Mostly clear, with a low around 40. North wind around 5 mph.

Tuesday: Sunny, with a high near 55. North northeast wind around 5 mph becoming south in the afternoon.

Tuesday Night: Mostly clear, with a low around 38.

Wednesday: Mostly sunny, with a high near 58.

Wednesday Night: Mostly cloudy, with a low around 39.

Thursday: Partly sunny, with a high near 60.

Thursday Night: Mostly cloudy, with a low around 42.

Friday: Partly sunny, with a high near 60.

Friday Night: A slight chance of showers. Mostly cloudy, with a low around 43.

Saturday: A chance of showers. Partly sunny, with a high near 61.