Issued at: 5:24 PM PST on December 5, 2013, expires at: 9:00 AM PST on December 06, 2013
- ...Frost advisory in effect from 10 PM this evening to 9 am PST Friday... The National Weather Service in San Diego has issued a frost advisory...which is in effect from 10 PM this evening to 9 am PST Friday.
- Temperature...30 to 36 degrees with isolated locations in the upper 20s
- impacts...sensitive plants could be damaged by the cold...and pets should be brought indoors. Precautionary/preparedness actions... A frost advisory means that frost is possible. Sensitive outdoor plants may be killed if left uncovered.
High Wind Watch:
Issued at: 5:24 PM PST on December 5, 2013, expires at: 7:00 AM PST on December 08, 2013
- ...High wind watch remains in effect from late Friday night through Sunday morning...
- winds...25 to 35 mph. Gusts 45 to 55 mph...locally over 60 mph.
- Timing...winds increasing after midnight on Friday...peaking Saturday afternoon and evening with speeds of 35 mph...gusting to 55 mph. Occasional gusts of 60 mph or more will be possible at times. Winds begin to weaken late Saturday night.
- Location...desert slopes of the mtns and adjacent desert areas.
- Visibility...areas of blowing sand and dust could reduce visibility to less than one half mile at times.
- Impacts...winds will make driving difficult...especially for motorists with high profile vehicles. Reduced visibility in blowing sand and dust may create hazardous driving conditions in some areas. Watch for debris on roadways and broken tree limbs.
- Outlook...by Sunday morning...winds decrease to less than 20 mph with gusts around 30 mph...then by Sunday evening winds will be mostly light. Precautionary/preparedness actions... A high wind watch means there is the potential for a hazardous high wind event. Sustained winds of at least 40 mph...or gusts of 58 mph or stronger may occur. Continue to monitor the latest forecasts.
Winter Storm Watch:
Issued at: 2:10 PM PST on December 5, 2013, expires at: 7:00 AM PST on December 08, 2013
- ...Winter Storm Watch remains in effect from late Friday night through Sunday morning... A Winter Storm Watch remains in effect from late Friday night through Sunday morning.
- Elevation...above 5000 feet.
- Snow levels...3000 to 3500 feet early Saturday morning... lowering to near 2500 feet by early Saturday afternoon.
- Snow accumulations...up to 4 inches from 3000 to 5000 feet withminor amounts below 3000 feet. 4 to 8 inches above 5000 feet in the San Bernardino and Riverside County mountains. Up to 10 inches above 5000 feet in the San Diego County mountains. A dusting up to 3 inches is possible in the apple and lucernevalleys.
- Timing...light snowfall begins early Saturday morning... increasing by early Saturday afternoon then tapering off Saturday evening. Most of the snow will fall between late Saturday morning and early Saturday afternoon.
- Winds...becoming west to northwest at 30 to 35 mph gusting to 55 mph with local gusts over 60 mph possible at times... mainly near ridge crests. In the apple and Lucerne valleys... winds of 20 to 30 mph gusting to 45 mph at times.
- Visibility...locally reduced at times in snow...blowing snow...and fog.
- Impacts...residents and travelers into the mountains and the deserts north of the San Bernardino Mountains should be prepared for hazardous winter weather conditions and possible Road closures. If possible...carry chains and take extra food and clothing. Watch for debris on roadways and broken tree limbs.
- Outlook...snow showers taper off Saturday night...and winds weaken Sunday morning. Precautionary/preparedness actions... A Winter Storm Watch means there is a potential for significant snow...sleet...or ice accumulations that may impact travel. Continue to monitor the latest forecasts. Pg