November 20, 2022 Strong upper level high pressure is virtually right overhead this afternoon. Dew points over the Kern County mountains have fallen to near 0 in some cases. Some of this very dry air has mixed down to the surface of the San Joaquin Valley and so the next couple of nights will be…
Category: Forecast
November 20, 2022 report
November 20, 2022 The Santa Ana wind conditions have mixed slightly drier air down to the valley floor, allowing the atmosphere to radiate its heat skyward during the night. As a result, a number of locations are a bit colder this morning. Several locations had reached into the upper 20s as of 6:00am. More…
November 19, 2022 afternoon report
November 19, 2022 Santa Ana winds are again cranked up, especially through the canyons of southern California. Winds at Sandburg near the top of the Ridge Route are at just under 50 mph. The winds have also leached down to the valley floor, at least in one spot. Winds at the CHP office are out…
November 19, 2022 report
November 19, 2022 The latest Santa Ana wind event is well underway. Winds at Sandburg near the top of the Grapevine are out of the northeast at 32, gusting to 47. At the bottom of the Grapevine, at the CHP office, winds are southerly at 15 mph. This isn’t much, but it does illustrate that…
November 18, 2022 afternoon report
November 18, 2022 The band of mid and high level clouds has now moved into southern California. Strong surface and upper level high pressure is rapidly building over the Great Basin. This will set the stage for another round of Santa Ana winds this weekend due to relatively steep differences in pressure between the Great…
November 18, 2022 report
I remember last year and how we had just a handful of frost nights. Here it is 2022 and every morning so far has been a frost night, at least at the colder locations. That’s 18 days in a row. What a difference a year makes. I don’t see much change in this pattern through…
November 17, 2022 afternoon report
November 17, 2022 Temperatures are around a degree or two warmer than yesterday, hovering in the comfortable low to mid 60s. the environment out there is slightly drier than it has been due to the Santa Ana winds in southern California the past couple of days. More on this in the frost discussion below. Also,…
November 17, 2022 report
November 17, 2022 The Santa Ana wind configuration weakened overnight, but not before the strong off shore flow lowered dewpoints somewhat, mainly in Kern County. Even north of Kern County, dew points are a few degrees lower, allowing subfreezing temperatures in more areas than previous nights. As of 5:30 this morning, coldest locations were down…
November 16, 2022 afternoon report
November 16, 2022 Santa Ana winds continue to buffet the Kern County mountains. These winds have been leaking downslope off the Tehachapi Mountains all day. At the bottom of the Grapevine, winds were sustained at 20 mph, gusting to 35 as of noon. At the top of the Grapevine, winds are out of the northeast…
November 16, 2022 report
November 16, 2022 The current altimeter reading at Salt Lake City is 30.58 inches of mercury while at LAX the current pressure is 30.19. That’s almost a .40 difference from one location to another. This is a large difference and is the main cause of the Santa Ana winds in southern California. Occasionally, these winds…