Low Snow Levels
updated: Dec 06, 2013, 10:15 AM
Source: Santa Barbara County Office of Emergency Management
...Precipitation Expected Saturday with Low Snow Levels; Continued Potential for Frost/Freeze Saturday and Sunday Nights...
Snow and wind across mountain highways - Significant travel problems could develop on mountain passes Saturday into
Saturday night due to snow levels dropping to about 3000 feet along with very windy conditions. Snow, blowing snow, and icing are likely along the
Grapevine (I-5), highways 2 and 14 across the San Gabriel Mountains, and highway 33 in the Ventura County mountains. Amounts: 1-2 inches near pass
levels with 3-6 inches above 5000 feet. Wind gusts >50 mph at times late Saturday.
Rain impacts to outdoor venues Saturday - Although we are not expecting a significant rain event, the timing of the rain on Saturday will likely impact many
outdoor venues where exposure could cause problems for unprepared people. Rain slick highways will likely create many traffic slowdowns and/or
Precipitation amounts will vary from mainly under 0.25" for coastal Ventura and Los Angeles, to 0.50" or greater for the central coast (San Luis Obispo
and Santa Barbara Counties), and the foothill communities. Heaviest amounts between 0.50-1.0" will be in the mountains of Santa Barbara Co. eastward into
the San Gabriel Mountains. See attached image.
Frost/Freeze - Crops and sensitive plants should continue to be protected across interior valleys tonight and Friday morning, then additional cold air
will lead to more freezing temperatures on Saturday night and possibly Sunday night as well. Some areas may not be as cold during this time frame due to
either lingering cloud cover and/or north to northeast winds, however most agricultural interests should continue to take measures to protect their crops
Saturday and Sunday nights.
A fast-moving and cold storm system will traverse southwest California on Saturday. Rain is likely to spread from the northern
counties early in the morning southward across Ventura and Los Angeles by late morning into the afternoon hours. Snow levels will start off near 5000 feet
and drop to 3000 feet or less at times Saturday afternoon which could quickly impact travel over mountain passes, especially when gusty winds over 50 mph
develop late Saturday. Cold air will follow the storm with another round of hard freeze conditions for many interior valleys and frost for colder coastal
valleys Saturday and Sunday nights.
High pressure and clearing skies are expected on Sunday. After Sunday night, temperatures will start to rebound for Monday and
Tuesday. Gusty northeast winds (offshore) will develop by early Monday morning with rapidly lowering humidities expected, with this trend continuing on
High confidence in the precipitation event and snow levels Saturday; medium confidence on freezing temperatures Saturday and
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