Author: Trudy Hibler

June 4, 2022 At the upper levels of the atmosphere, there is a fairly robust low pressure system centered just west of Vancouver Island. The jet stream is flanked underneath the low and runs from west to east across the eastern Pacific and into northern California. Doppler radar is actually picking up virga from the…

June 3, 2022 The marine layer along the coast has now deepened enough to allow a shallow intrusion of modified sea breeze to move down the valley. The result will be a minor cooling trend. The cooling will be most pronounced today from Merced north as they have a nice air conditioning vent known to…

June 2, 2022 California is on  the far back side of upper level high pressure which is currently moving eastward into the middle of the country. A large low center is located several hundred miles off the Washington coast and is developing a trough southeastward into northern California. Mid 90s can be expected for one…

June 1, 2022 The marine layer has crept back towards the beaches this morning as upper level high pressure, which was off shore yesterday, will move overhead today. This will result in temperatures jumping from yesterday’s mid 80s to the mid 90s today. A trough of low pressure will stretch from off shore Washington down…

May 31, 2022 Today is the last day of meteorological spring. The month of May will go down as completely dry for the valley which pretty much caps off yet another dry year. Precipitation is around 60% to 65% of average at most locations. Meteorological summer begins tomorrow and, just as the calendar flips, temperatures…

We will be out of the office Monday, May 30. Reports will resume Tuesday, May 31. Have a safe holiday weekend.     May 28, 2022 There is a 12 millibar difference in pressure between San Francisco and Las Vegas at this hour. This is resulting in winds out of the northwest at 10 to…

Temperatures today will drop by a good 10 to 13 degrees  over  yesterday’s readings. The upper  high responsible for  the short lived heat wave is now moving into the middle of the country while a trough of low pressure extends from British Columbia down into northern and central California. Roughly an 8 millibar difference in…

The dome of upper level high pressure responsible for widespread triple digits yesterday is already shifting into the Great Basin. High resolution  model information is indicating most locations will heat into the upper 90s today. Most of this will be due to synoptic cooling, then on Friday, pressures will fall over the interior, tugging the…

The  correct recipe for a very hot day is now in place. At the upper levels of the atmosphere, high pressure is right overhead. Couple that with a weak off shore flow and weak down slope heating will be the result off the Sierra Nevada and Tehachapi Mountains. The altimeter reading at Las Vegas currently…

May 24, 2022 Upper level high pressure is centered roughly 500 miles off the central coast with the eastern flank of the high over California and the Pacific Northwest. Significant warming is taking place at all levels of the atmosphere. The freezing level over Oakland has risen to just under 16,000 feet. Satellite imagery shows…