John Coleman’s 7-day supercast – October 1, 2010

John Coleman's 7-day supercast – October 1, 2010

ABOUT OUR WEATHER

By John Coleman
jcoleman@kusi.com
Read John Coleman's blogs on climate change
on the Coleman's Corner page of this web site.

The tropical surge that has been hanging around the Southland all week is due to move away over the weekend and my experience tells me the exit will be uneventful.  The heat of Monday and thunderstorms of Thursday certainly broke the pattern of night and morning low clouds and afternoon sunshine for we San Diego forecasters.  And, I am always a bit amazed how unusual weather quickly becomes all consuming to our daily lives here in the usually tranquil Southland.  I have received quite a few pictures from people, mostly of the rainbow but some of unusual clouds.  I will be attempting to post some of those pictures soon.  

Why did the tropical low stall just off shore of San Diego for the week.  Why didn't it keep on moving.  Those are interesting points that illustrate my statement that we live in a meteorological cul-de-sac. South of us that low was getting a push from the trade winds.  North of here it would have had a west to east push from the mid latitudes circulation.  Here, most of the time, we are in a weather void where the day to night, diurnal, differences are more of the nature of the weather than any dynamic aspect of the circulation.

Here is the official National Weather Service forecast for San Diego for the next seven days captured from the NWS web page late on Friday afternoon:

Tonight: A 20 percent chance of showers and thunderstorms. Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 66. West wind around 5 mph becoming calm.

Saturday: A 20 percent chance of showers and thunderstorms. Patchy fog before 11am. Otherwise, partly sunny, with a high near 77. Calm wind becoming west between 5 and 10 mph.

Saturday Night: A 20 percent chance of showers and thunderstorms. Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 64. West wind between 5 and 10 mph becoming calm.

Sunday: Patchy fog before 11am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 75. Calm wind becoming west between 5 and 10 mph.

Sunday Night: Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 61. West wind between 5 and 10 mph becoming calm.

Monday: Patchy fog before 11am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 72.

Monday Night: Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 59.

Tuesday: Patchy fog before 11am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 70.

Tuesday Night: Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 56.

Wednesday: Patchy fog before 11am. Otherwise, mostly sunny, with a high near 73.

Wednesday Night: Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 58.

Thursday: Patchy fog before 11am. Otherwise, mostly sunny, with a high near 74.

Thursday Night: Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 59.

Friday: Patchy fog before 11am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 72.

Categories: KUSI