Category: Forecast

October 5, 2017 Summary:  The low pressure system over the Great Basin is now elongated from northern Nevada to eastern Montana.  This has created a northwest flow along the western flank of the system and this continues to pump in cool air aloft.  Temperatures in ag areas this morning are again well down into the…

October 4, 2017 Summary:  The upper level low which 24 hours ago was centered in northern California has scooted northeastward into Idaho.  This will keep the northwest flow over central California going, so even though temperatures will warm a few degrees today, the warming trend will be slow.  The freezing level overnight over Oakland was…

October 3, 2017 Summary:  There will be a couple of gorgeous fall days ahead.  Upper level low pressure is centered over northern California this morning and may spread some light showers down the northern and central Sierra Nevada later this afternoon and tonight with a dusting of snow up high.  The low has also caused…

October 2, 2017 Summary:  We have a squeeze play between high pressure over the eastern Pacific and low pressure over the Great Basin and northern Rockies.  This has created a strong northwest flow over northern and central California.  At the surface, a rather robust on shore flow is in place.  Several locations from Merced northward…

September 30, 2017 Summary:  Low pressure now moving into the Pacific Northwest and northern California is shifting upper level high pressure off to the east to be replaced by a significant but fairly dry low pressure system centered over the Great Basin.  This low will be the dominant feature through at least Thursday.  It will…

September 29, 2017 Summary:  Already this morning there are subtle signs of an overall change in our weather pattern, minor as it may be.  Yesterday at this time, the marine layer was only 200 feet deep and here we are 24 hours later with a marine layer of 1,500 feet and rising.  This is all…

September 28, 2017 Summary:  The center of the upper low this morning has moved north/northeast and is now centered over Utah.  The counterclockwise circulation around the low is maintaining a northerly flow over California.  At the surface, a weak off shore flow is still prevalent.  In fact, the marine layer this morning at Monterey was…

September 27, 2017 Summary:  At the surface, an upper low has developed over extreme western Arizona and has the winds at  the surface off shore.  This will create an east to northeast flow over central California.  In the meantime, upper level high pressure has nosed into the Pacific Northwest and is also creating a northeast…

September 26, 2017 Summary:  The low pressure system that resulted in mild conditions of late has now moved into the northern plains states.  Meanwhile, upper level high pressure is slowly building into the Pacific Northwest and  northern California.  This keeps the northerly flow above central California going.  Latest soundings above the valley have winds out…

September 25, 2017 Summary:  Temperatures at most locations will move into the mid 80s this afternoon and near 90 at many locations Tuesday.  Currently, we have a northerly flow aloft rotating around an upper level high off the Pacific coast.  At the surface, an off shore flow is developing which will create Santa Ana wind…