Tuesday is the first day of summer – and it will certainly feel the same in Northern California, where temperatures are expected to rise, said the National Weather Service.
After a mild weekend, this week in California comes “a significant change in the weather pattern,” UCLA climate scientist Daniel Swain wrote on Twitter. “A long period of significantly higher temperatures in the interior of the country is expected, which will be a dramatic change from the recent low temperatures in the north.”
Swain said another turnaround in the state this week: “Besides, it looks like an early / pre-monsoon jump will arrive in the southern two-thirds of California by mid-week. This will bring a chance for at least mountain / desert t-storms and maybe even the possibility of lightning over lower altitudes south of I-80. The details are still unclear, but there may be some drought-related flashes in the peak drought area. “
The Central Valley will see some of the hottest temperatures in the north of the state, with triple figures likely to remain in many places over the weekend. Tuesday and Wednesday will probably be the hottest days of the week in the Central Valley. Further north, Reading is expected to register the highest 104 on Tuesday and 107 on Wednesday. Sacramento is expected to reach 102 on Tuesday and Wednesday, the meteorological service said.
“We don’t expect any records, but we will be about 10 to 15 degrees above normal for this time of year,” said Scott Rowe, a weather forecaster with the Sacramento Meteorological Office.
In the San Francisco Bay Area, mercury is expected to peak on Tuesday; Discovery Bay is expected to reach 105, Concord 103, Santa Rosa 100, San Jose 98, Auckland 93 and San Francisco 83.
“It’s still toasted until Wednesday, Thursday, and then it starts to get a little colder until Friday,” said Sarah McCorkle, a weather forecaster with the Bay Area office.
The monsoon forecast rose on Wednesday, but forecasters said Monday it was too early to determine exactly what the low-pressure system would bring to Northern California. In the Gulf region, forecasters believe that dry lightning and thunderstorms are very unlikely, but the change in weather is likely to lead to a slight drop in temperature.
“Temperatures on Wednesday will continue to be widespread since the 1990s, with some low 100s for the interior, but should be slightly lower than Tuesday,” the meteorological service said.
The highest chances of thunderstorms and dry lightning are on the Sierra ridge, Rowe said.
“There is very little confidence in the trajectory of this moisture,” he said. “We currently have a 10% to 20% chance of dry lighting on the Sierra ridge. That’s one of those things that’s hard to predict. “
Dry lightning is a concern in the summer, when it can cause forest fires, but Rowe said the risk of fire remains moderate in the Sierra due to the recent light rain, which keeps vegetation somewhat moist.
The chances of thunderstorms, both dry lightning and light rain due to monsoon humidity, are higher in the desert regions of Southern California than in Northern California.
Add Comment