Cold Storm Weekend
A low pressure system is quickly moving south into California this Friday evening with an increase in cloud cover and the growing threat for rain and snow. It is now expected that some precipitation will begin Friday mid-evening with a greater chance for mostly light rain overnight into Saturday morning.
There are at least three distinguishable waves that will be moving through central California with this period of unsettled weather. First is the initial light rain this evening which will persist through Saturday morning's sunrise. Snow levels will be high to begin but drop to around 5,000' by early Saturday. A Winter Weather Advisory has been posted for the potentially dangerous winter conditions in the Kern County mountains this weekend. The Advisory remains in effect through 4 AM on Monday morning. Precipitation totals with the first wave should be light- less than a tenth of an inch in the south valley and a dusting in the mountains above 5,000'.
The second wave comes Saturday evening into Sunday morning. Snow levels will drop to the major passes and the south valley could see up to an additional quarter inch of rainfall. The probability of precipitation is 40% Saturday afternoon, but increases to 60% Saturday evening and overnight. There could be an issue with travel over the Grapevine Saturday night. A few thunderstorms are possible as a deep upper level system crosses through Kern County Sunday. Small hail is also possible, as well as lightning and brief heavy rainfall.
Finally, the third and final part of this system arrives with a separate impulse coming from the north late Sunday evening into Monday. Snow levels will fall to around 3,500 feet at their lowest during this time. It could pose a problem for commuters on Monday morning over the passes. I expected 2-4" above 5,000' and around 1" above 4,000'. Total rainfall in the south valley will range from .15" to .40". Monday will also feature the chance for a thunderstorm.
By Tuesday the inclement weather will begin to clear as the low pressure complex moves east. Dry and warmer weather is forecast for next week from Tuesday on. Another chance for rain is in the offing, according to computer models, at the end of the 10-day forecast period. It appears that March may be coming in like a lion.
2-27-15 6:47 pm Chief Meteorologist MILES MUZIO