High pressure over the far west will gradually weaken the next week…Weak upper low will destabilize the air-mass over the Central Sierra for the chance of thunderstorms this afternoon and Saturday……Shift in the upper jet further south along the west coast next Wednesday will bring an end to the stretch of 80 degree days in Mammoth and 100 degrees days in Bishop….
Friday July 1, 2016
Posted at 8:57 am by Howard
One small Vort center has moved on-shore near San Jose this morning, and will approach the sierra this afternoon. Scattered thunderstorms may develop today over Western Mono County, then shift off to the east later this afternoon. So the Town of Mammoth and June may have some rainfall today Saturday. (30%) chance.
]It will be dry Sunday through next Saturday…. Highs in Mammoth will be in the high 70s then cool to the mid to upper 70s by mid-week. lows in the 40s There will be a stronger Zephyr by mid-week.
The following week looks hot with the chance of the return of the summertime monsoon…
For the next few days, Mammoth will bask in low 80s but the end to our heat wave appears to be in sight now as a trough in the mean deepens over the pacific NW south to California. Breezier afternoons will develop by Tuesday or Wednesday and beyond. Highs will retreat back into the 70s with night in the 40s by Wednesday.
In the meantime, a very weak upper low will act upon strong daytime heating to initiate some thunderstorms today and Saturday. This is not the Monsoon, rather some weak forcing from the west.
The Dweebs could not see any upper divergence in the 250mb progs this morning. So I am skeptical about how much storminess will actually develop. This is a pattern that the models do not handle well.
For the record….the NWS is calling for scattered Thunderstorms this afternoon…today and Saturday with the pattern becoming fair by Sunday through the Holiday. High will be near upper 70s to low 80s cooling to the 70s by Wednesday.
Dr Howard and the Dweebs…………………………:-)