Sunday, April 25, 2010

Another Fab Weekend Comes To An End, More Rain For Mid Week

Today's weather is expected to be even warmer than Saturday. Already at 8AM it is over 40F at 7800'. Not to shabby. Beach weather down at the coast is expected after an early morning fog burns off.

Temperatures begin to cool off on Monday with increased winds and clouds. Slight chance of rain in the evening and likely by Tuesday morning. Tuesday's high are to be 15-20 degrees cooler than today. Rains may be very heavy, but it currently looks like the most severe weather is to stay just north of San Francisco. South Bay can expect up to a 1/2 inch of rain through the next week. Northern Marin and Sonoma can expect much more. The Sierra Crest should receive between 2 and 2 1/2 inches of precip - or 2 plus feet of snow above 8000'. Snow levels may lower to 3000' during brief periods of the storm. Little to no accumulation at that elevation. Crazy April for sure.

After Tuesday , the weather is to remain showery through Wednesday night. Some clearing by Thursday, but to remain cloudy and cool. Sun returns for Friday and the weekend, and temperatures warm a bit (around 70F for a high). Looks like another nice book end.

Water year is looking better. At April 1st, snow pack in the Sierra was below normal. Forecasters recently went out after this last storm to re-calculate. We are now at 138% of normal, which bodes well for our reservoirs. Speaking of which, Lexington is looking very very full, and may be near its limit. And this next storm may help those reservoirs lacking water just to our north.

Currently, the charts show a high pressure attempting to take control by next week. Climatological data supports this forecast (and would have done so a month ago). It is much more typical for us to be high and dry this time of year, with an occasional system breaking through. Still, the charts do not suggest we can stop thinking about possible rains. A slight shift in the axis of the next weather bubble, and we are back into potential rains.

Expect a late season this year on summer produce. The farmers are having a hard time getting out in their fields to plow. The tractors are not loving the wet ground and mud. So prices may be high and supplies late on beans, tomatoes, peppers, eggplants, potatoes and more. Be prepared. OTOH, I hear that fruit and nut trees may have a good year.

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