Category: Forecast

October 15, 2020 Summary: Strong upper level high pressure continues to be anchored roughly 400 miles off the central coast.  At the surface, barometric pressure is roughly 5.80 millibars higher at Tonopah, NV than they are at Fresno, meaning we have an easterly flow at the surface, although it’s fairly weak.  That off shore flow…

October 13, 2020 Summary: Upper level high pressure is centered a few hundred miles off the central and southern California coast.  At the surface, pressures are marginally higher over the Great Basin than they are off shore, generating a weak off shore flow.  Temperatures this afternoon will approach the 90 degree mark in the warmest…

October 12, 2020 National Farmer’s Day Summary:Skies are mostly clear over central California this morning.  There are some upslope clouds against the north facing slopes of the Tehachapi Mountains, but with a weak off shore flow, those clouds will dissipate later today.   The central player in our weather is a zone of upper level…

October 10, 2020 Summary: Two low pressure systems of note we are studying this morning.  the first is a rapidly weakening system now off the southern California coast.  The second is a much  more substantial trough of low pressure currently moving through the Pacific Northwest.  Showers have spread as far south as the northernmost counties…

October 9, 2020 Summary: Low pressure is located roughly 350 miles west of the Golden Gate this morning and is moving southward parallel to the coast as it weakens.  In the meantime, a trough of low pressure is approaching the coast of the Pacific Northwest.  Satellite imagery is interesting this morning as it shows a…

October 8, 2020 Summary: Today is the day we finally see temperatures return to seasonal averages.  Another weak disturbance will move through northern and central California today.  The marine layer has jumped up to near 2,000 feet and is moving through the Delta as winds at Travis Air Force Base are out of the southwest,…

October 7, 2020 Summary: Yesterday was the first time in ages most locations fell below the 90 degree mark, although just barely.  This is due to a benign upper low which currently is just off shore and will move inland right over the valley this afternoon.  Most of the high clouds associated with this feature…

October 6, 2020 Summary: In the short term, the main challenge is a benign moisture starved upper low off the central coast.  Currently, it’s about 250 miles off to sea.  It has picked up a minimal amount of mid and high level moisture from tropical storm Marie which is falling apart about 1,200 miles west…

October 5, 2020 World Teachers Day Summary: We continue to be under a dome of upper level high pressure, although marginal weakening is taking place due to a benign upper low roughly 500 miles to the west of the central coast.  This little feature is also picking up some high clouds from rapidly weakening tropical…

October 3, 2020 National Techies Day Summary: Strong upper level high pressure continues to blanket the western one-third of the U.S. and off shore waters.  The northern rim of the high is well north into western Canada while a very autumn-like trough of low pressure governs the eastern two-thirds of the U.S.  The warm bubble…