Category: Uncategorized

November 24, 2023                                                                   Summary:   An area of low pressure has developed with its center over eastern Nevada and northern Utah. Upper level high pressure is situated along the Pacific coast with a ridge extending northeastward into British Columbia. The upper winds between the off shore high and the low over the Great Basin has created…

November 23, 2023 Summary:  A weak trough of low pressure moved through overnight and early this morning and was marked with variable cloudiness but little else. Skies have cleared over most of the district. Our typical late fall/early winter haze is quite evident this morning as visibilities are running just 3 to 5 miles throughout…

We will issue a single report late tomorrow morning, Thanksgiving Day, in order to spend the day with our family.  We will be out of the office the remainder of the day. November 22, 2023 Summary:  The high clouds out there this afternoon are from a weakening trough of low pressure currently moving into the…

November 22, 2023                                                                   Summary:   The ridge of high pressure at the upper levels of the atmosphere which resulted in above average temperatures the past few days is beginning to be suppressed southward in response to a trough of low pressure currently over the Pacific Northwest. This trough will drop a trough into California from the…

November 21, 2023 Summary:  An area of upper level high pressure extends from off shore central California to Montana this afternoon. Variable high clouds are overrunning the high and will be with us through the night. temperatures as of midday are anywhere from 5 to 7 degrees warmer than 24 hours ago with warmest locations…

November 21, 2023                                                                   Summary:   We are currently being dominated by two areas of high pressure. The first is a ridge extending from the eastern Pacific Ocean northeastward into Montana. The second is a surface high which, in part, is generating a robust off shore flow. Santa Ana winds are buffeting southern California and will continue…

November 20, 2023 Summary:  A ridge of upper level high pressure now covers the eastern Pacific and encompasses the western ¼ of the US with a ridge extending northward into British Colombia. The ridge will begin to give way to a weak trough of low pressure Wednesday night and Thursday. This will quickly be followed…

November 20, 2023                                                                   Summary:   At the upper levels of the atmosphere, a fairly strong ridge of upper level high pressure is anchored along the west coast with a ridge extending inland into the western ¼ of the US. The current altimeter reading at Boise, Idaho is 30.52 inches of mercury while at LAX the current…

November 19, 2023                                                                   Summary:   The area of low pressure which resulted in mainly light rainfall amounts the past 48 hours has now shifted eastward into the Great Basin and Rocky Mountain region. Most locations have recorded less than .15, however there are some notable exceptions due to thunderstorm activity yesterday afternoon. Merced recorded .46 while…

Numerous light showers are occurring over the valley as of midday. Satellite imagery depicts mostly clear skies off the central coast along the back side of the trough. However, models are again showing the system moving to a crawl so even though clearing is taking place off shore, it may be sometime late tonight before…