Friday, December 15, 2017



Today’s Forecast for Crestline, Lake Arrowhead and the San Bernardino Mountains.
Good Morning.
This morning the NE winds will continue to decrease across the SoCal region. The pressure gradient that runs from Tonopah Nevada, to San Diego, responsible for the Santa Ana Winds, is breaking down this morning. We will see a reversal of NE winds across the area to a SW flow by later today. A trough of Low pressure is rapidly moving south along the West Coast of California today. This will bring the wind change and a short term increase in humidity for the local area of SoCal. Here in SoCal, we will be at the bottom of the trough, therefore we will not have any measureable moisture from this system. However, a Cut Off Low is expected to form somewhere between San Diego and Western Arizona tomorrow morning. Depending on where exactly this forms will dictate if we will have a slight chance for a sprinkle and some cloud cover here, or just a wind change and some coastal low clouds and fog for Saturday morning. As the sharp trough passes, NE winds will again return to the area as well as the RED FLAG and High Fire Danger levels due to gusty winds and low humidity. Temperatures will be much cooler tomorrow as cold air advection from the Great Basin will usher in with the NE winds.
Temperatures for today will be in the low to mid 60s across all of the Mountain locations. Tonight’s overnight lows will run from the low to mid 30s below 6000′ to the low to mid 20s above 6000′. For the San Bernardino area, highs today will be in the upper 70s with overnight lows around the 45-50* mark. All area will see an increase in high clouds later today and for tomorrow morning. For the longer range outlook, cooler temperatures can be expected next week with periods of gusty NE winds. No measureable rain is expected for the next five days.
The long range outlook shows a weak chance for a system to pass through SoCal on or about the 21st of December. We are definitely in a LA NINA pattern. Yesterday the ENSO update was posted and the general consensus is for LA NINA to remain the dominate factor in our West Coast Weather through March. So far this winter has a resemblance to the winter of 1991. That year we had a years worth of rain/snow in the month of March. We’ll see.
Thank You for joining me @ *RC


If you click on the green Station name, it will take you to that WX/Station

LAKE GREGORY———-57/36…Elev 4618’…0.00″ RAIN*

VLY/MOON—————-58/38….Elev 4974’…0.00″ RAIN*

SKYLAND DR.————–57/44….Elev 5036’…0.00″ RAIN*

CDR/PINES/PRK———-57/42….Elev 5784’…0.00″ RAIN*

TWIN PEAKS—————54/42….Elev 5784’…0.00″ RAIN*

RIM FOREST—————60/45….Elev 5768’…0.00″ RAIN*

DEER LODGE————–55/45….Elev 5132’…0.00″ RAIN*

CEDAR RIDGE————-57/42….Elev 5580′..0.00″ RAIN*

SKYFOREST—————-55/42…Elev 5863’…..0.00 RAIN*

RUNNING SPRINGS——58/41…..Elev 6283′..0.00″ RAIN*

GREEN VALLEY LAKE—57/47…Elev 6925′..0.00″ RAIN*

BIG BEAR/-SHAY/MDW-52/18..Elev 6781′..0.00″ RAIN*

UPR-WTRMN/CYN——–66/54….Elev 3208′..0.00″ RAIN*

SAN BERNARDINO——–79/55….Elev 1278’….0.00″ RAIN*


This years rainfall total is,  1.51″ at my location. The Rainfall year starts on July 01, and ends on June 30th.

Last years season (2016-2017) rainfall total was, 45.90″ including melted snow moisture at my location.

The Total for the 2015-2016 Rainfall Year, was 32.38″ at my location on the South side of Lake Gregory.
Normal for the Crestline area is around ~40.00″.

A Big Thank you, to all of you who have contributed to the costs of maintaining this website.  I really appreciate your support.

Ron Chalfant

If you are interested in learning more about the weather and how it works, at 6pm local time, Tim Vasquez has a 30-40 minute broadcast on YouTube videos that you can learn some of the details in weather forecasting. LINK:  Tim Vasquez. He also has written several books that are worth reading if you are interested in Weather, that can be found on Amazon.

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*RC. The information on this site is determined from many sources and is the most probable solution for our local area.
Weather is a dynamic force and can change in a brief period of time.

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