Snowfall Rates To Increase Again tonight! The Night of Lights should be Spectactular!
Saturday December 18, 2010
Posted at 1:35 pm by Howard
So far….snowfall amounts ranged from 5 feet over the crest to 2 to 3 feet near the village. Snowfall to increase again tonight!
Today’s WX pattern is consistent with yesterday. Upper ridge continues over the dateline with weak tropical low to the south near 22n-179w spinning up moisture. This pattern continues to advect moisture northward from west of Hawaii then NE toward the west coast. The deep vortex over Gulf of AK has now moved SSE to off the Oregon coast. The upper westerly flow is consoladating at the base of the upper low. Meanwhile subtropical moisture is being pulled eastward and as it approaches the west coast it is being energized by the upper jet.
Latest AMSU TPW shows a even higher moisture content within the river with peak values 1.5 to 1.6 inches now.
Looking at the the NAM 12 Time Height Sections off the 18z Run, ( http://weather.utah.edu/index.php?t=nam212&r=MSA&d=ET#) UVM was at low ebb over Mammoth Mt. today. DVM will continue until about 7:00pm (03z) then increase into the night. Plenty of deep moisture with this system…..way up to 300mb. Snowfall rates will increase again after 7:00pm…with peak UVM about 15z Sunday. (7:00AM) Plenty of Upward Vertical Motion exists through Sunday afternoon in the saturated air mass. Expecting another 2 to 4 feet at the village by Sunday night.
The cold front will move toward the state early Sunday and reach the coast during the morning. FROPA for Mammoth should be about 02z Monday. (6:00pm Sunday) The max precip will be from Central Ca south toward Southern Ca.
Dr Howard and the Dweebs………………………….:-)
Potential Bluebird Morning……. December 22nd!
Reference Glossary of Weather Terms
Disclaimer: I have been a hobbyist meteorologist for over 30 years here in the Mammoth area and I do this for my personal enjoyment. The National Weather Service saves lives every day . . . I do not. When making important planning decisions please use information provided by the National Weather Service as they are the most knowledgeable and accurate information source available today.