Saturday, Sept 22, 2018






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

Good Morning.
Another nice day to start FALL off. Today there is a pretty much neutral pressure gradient across all of SoCal to the Desert region. There will be some Tropical Moisture flow into the lower Deserts again today with a very slight chance for a Thunderstorm near the San Jacinto mountain and adjacent areas. Clear skies will be the forecast for the local area with light and variable winds today. Temperatures will be much the same as what we saw yesterday with highs in the upper 70s to low 80s across the mountain. A nice day for outdoor activities. Overnight lows will run from the low 40s in Big Bear to the upper 50s to mid 60s in the Crestline and Lake Arrowhead areas. Today should be the warmest day of the next five days, as a Trough of low pressure will slide West to East across the Northern part of the West Coast. SoCal will be at the bottom of this Trough. This will bring cooling trend to the area through Tuesday. Wednesday through Friday, High pressure will return with slightly warmer temperatures returning at that time. Wednesday and Thursday we may see a weak Santa Ana develop as the Trough passes and Higher pressure rebuilds across the area. At this time, there is no rain in the five day outlook. However, there is a Cut-Off Low developing to our West out over the Pacific. The Cut-Off Low is expected to remain stationary through the end of September. This will come into play toward the end of the month or beginning of October when a couple of Tropical Disturbances move North parallel to Baja CA. RC

Yesterday’s High and Low temperatures were:
Crestline-82-55*, Twin Peaks-77/63*, Lake Arrowhead-79/64*, Running Springs-79/62*, Big Bear-75/40*, San Bernardino-99/59*.
Average local temps for today are: 74/49*. MIN-36*(2007) MAX-94*-(1949)

Forecast Temperatures for the next three days:

Crestline, Twin Peaks, Lake Arrowhead:

Sat-77-82*/62-66*, Sun-74-80*/57-65*, Mon-70-76*/58-64*.

Big Bear, GVL, Running Springs:

Sat-73-78*/40-50*, Sun-72-78*/42-52**, Mon-72-75*/43-53*.

San Bernardino:
Sat-94-98*/62-68*,Sun-89-94*/62-68*, Mon-90-95*/55-62*.

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