Thursday, Sept 27, 2018






Today’s Forecast for Crestline, Twin Peaks, Lake Arrowhead and the San Bernardino Mountains.

Good Morning.
Today temperatures across the mountain will be close to yesterday’s or maybe a couple degrees warmer. Skies will be clear with light winds from the South West from 5-10mph. An area of Low pressure will move through the NW later today. This will be the beginning of a weather pattern change for all of SoCal. This trough will bring much cooler weather to the Mountains for Friday, and through the weekend. This will also help to slowly deepen the Marine layer as the onshore flow also develops. Temperatures over the weekend will lower by 5-10 degrees locally from what we will have today. A second Trough will arrive Monday-ish. This will likely draw Sub-Tropical moisture into Eastern SoCal Monday through Wednesday from now Hurricane Rosa. This second area of Low pressure will be fairly potent with plenty of cold air as well. When these two air masses meet, there will likely be outbreaks of severe weather including Thunderstorms, rain, possibly heavy, along with gusty winds. As it looks this morning, we will be on the Western side of the remnants of Rosa as an area of Vorticity passes through the flow from the Low pressure system dropping down from the North, Tuesday morning. This is when we will have our best chance for rain locally. Showers will be possible late Monday through Wednesday, as this all passes through. Daytime Temperatures will be in the upper 50s to low 60s early next week with gusty winds up to 25mph at times. As you can see we will have a variety of weather over the next five to seven days. Enjoy the ever changing Mountain weather. Have a good day today and enjoy the great Mountain weather.

Yesterday’s High and Low temperatures were:
Crestline-86/55*, Twin Peaks-80/65*, Lake Arrowhead-87/66*, Running Springs-78/64*, Big Bear-77/37*, San Bernardino-98/64*.
Average local temps for today are: 47/73*. MIN-34*(1948) MAX-88*-(1963)

Forecast Temperatures for the next three days:

Crestline, Twin Peaks, Lake Arrowhead:
Thur-82-87*/56-64*, Fri-77-83*/50-58*, Sat-68-74*/48-55*, Sun-69-74*/50-56*.

Big Bear, GVL, Running Springs:
Thur-75-79*/37-48*, Fri-72-76*/38-48*, Sat-68-74*/37-48*.

San Bernardino:
Thur-95-99*/60-65*, Fri-92-97*/59-65*. Sat-85-90*/55-65*.

Thank you for joining me @, or on Facebook @ Lake Gregory Weather Group, Rim Weather, or, San Bernardino Mountains.
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