Category: Forecast

July 11, 2018 Summary: The flow aloft is currently east/southeast and continues to pump monsoon moisture into central and southern California.  Embedded within this flow is a very weak easterly wave which will aid in triggering scattered afternoon and evening thunderstorms over the Sierra Nevada and the Kern County mountains.  The thunderstorm activity over the…

July 10, 2018 Summary: The dividing line between a dry, southwesterly flow over northern California and a moist, southeast flow over central California is right about at Madera County.  Northern California is essentially cloud free while variable cloudiness covers central and southern California.  In southern California, there are a few light showers pretty much left…

July 9, 2018 Summary: We’ll observe lots of heat this week along with occasional bouts of monsoon moisture.  Doppler radar at this hour is showing some scattered light showers over the Tulare County portion of the Sierra Nevada.  There are also isolated showers over the mountains and deserts of southern California.   Upper level high…

July 7, 2018 Summary: It was hot in the valley yesterday, but it paled in comparison to southern California.  The Los Angeles basin cooked under a searing heat wave which resulted in temperatures between 110 and 120.  Woodland Hills hit 117 as did Chatsworth with 115 at Van Nuys.  Even downtown LA hit 108 which…

July 6, 2018 Summary: A swath of mid and high level clouds continues to stream from southwest to northeast, but has now pushed into central and northern California.  By this afternoon, most of this high level moisture will be aimed at northern California with mostly clear skies returning.  Temperatures will begin an upward climb today…

July 5, 2018 Summary: The first thing we notice on satellite imagery are high clouds off the southern California coast.  These are the remains of a long dead tropical system.  They will become visible today as a southwesterly flow aloft tugs them to the northeast.  Temperatures will begin to warm today as the marine air…

July 3, 2018 Our office will be closed Wednesday, July 4.  Reports will resume July 5.   Summary: We will be the benefactors of a cooling trend just in time for Independence Day.  The necessary configurations on the weather map already have caused the marine layer to deepen to 2,800 feet at Monterey.  This is…

July 2, 2018 Summary: The first two-third of this week will be very mundane as the typical balancing act involving the marine layer shows us the layer is 1,900 feet deep.  There is some sea breeze trickling through the Delta and a minimal amount  moving through Pacheco Pass, but not enough to have much impact…

June 30, 2018 Summary: The modified marine air which was partially responsible for the minor cool down the past couple of days has now mixed out.  Upper level high pressure off the northern California coast is currently building inland.  This will result in the return to triple digit temperatures today through Monday.  Already this morning,…

June 29, 2018 Summary: The valley is pooled with a shallow layer of marine air this morning.  This has resulted in pleasant overnight lows with many locations dropping below the 60 degree mark.  The marine air will mix out today, but will still keep temperatures in the mid 90s.  the marine layer itself is 2,000…