Saturday, October 21, 2017



Today’s Forecast for Crestline, Lake Arrowhead and the San Bernardino Mountains.
Good Morning.
First off this morning, the Forecasts I present on this website are my own. They are based on my knowledge and interpretation of several weather resources that are available to me via the internet and subscription resources. RC
Today, we will see a big change in our local weather from what we had yesterday. Around 4am this morning we saw a wind shift from the South West, to the North East. This is a signal of an upcoming major change to our weather. An area of High pressure that is now off of Baja California will begin to expand across the Western Pacific and over the land area West of the Rockies. This surface High pressure area is currently at around 588dm. By Monday pm, the pressure is expected to build to around 596dm and cover all of California, Oregon, Nevada, Utah and Arizona. As the pressure builds centered over or near the Great Basin, temperatures in SoCal will be on the rise with highs expected to be near 100* by Monday in the Valley. Here in the Mountains above the 4500′ level, temperatures will be warmer but should remain in the upper 70s with a few areas in the low 80s by Monday. The other factor in the weather will be the likelihood of strong to very strong Santa Ana winds across most of SoCal, especially in the Santa Barbara and Ventura areas Monday. Here, we had winds early this morning (4am)gusting to 45mph at the Playground Drive Wx/Station. Waterman Canyon had winds from the NE gusting to 28mph. Other areas had wind gusts from 10-20mph as did my location at the south side of Lake Gregory. Today, winds will be gusty building again by this afternoon through Sunday morning. Then, calming down for the morning hours and regaining intensity for the afternoon, as it looks this morning. The warmest temperatures and highest winds should arrive Monday, through Tuesday morning. Then a return to a South West flow late on Tuesday. Temperatures will slowly cool beginning mid week next week. This will be a several day winds event with a RED FLAG WARNING for most areas. If you are using any outdoor fire such as a BBQ or welding, please use extreme caution! Also, if you don’t need your fireplace for heat, don’t use it as it can spread sparks when in use especially during these wind events. Fortunately, with the moisture we received yesterday (listed below) this will help to reduce the fire threat to some degree. As always, report any suspicious activity to 911, especially during these Santa Ana Wind events. That’s it for now. Thank You for joining me @



500mb chart for Monday pm


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

LAKE GREGORY———-52/39…Elev 4618’…0.14″ RAIN*

VLY/MOON—————-51/37….Elev 4974’…0.14″ RAIN

SKYLAND DR.————-51/36….Elev 5036’…0.23″ RAIN*

CDR/PINES/PRK———-51/35….Elev 5784’…0.00″ RAIN

TWIN PEAKS—————49/33….Elev 5784’…0.06″ RAIN*

RIM FOREST—————52/37….Elev 5768’…0.21″ RAIN*

DEER LODGE————-52/36….Elev 5132’…0.00″ RAIN

CEDAR RIDGE————50/34….Elev 5580′..0.05″ RAIN*

SKYFOREST—————49/33…Elev 5863’…..0.04 RAIN*

RUNNING SPRINGS—–47/36…..Elev 6283′..0.02″ RAIN*

BIG BEAR/-SHAY/MDW–59/27..Elev 6781′..0.00″ RAIN*

UPR-WTRMN/CYN——-60/50….Elev 3208′..0.13″ RAIN

SAN BERNARDINO——-70/53….Elev 1278’….0.01″ RAIN

This years rainfall total is,  00.99″ 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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Be sure to check the WEBCAM PAGE for visible weather conditions around our local area.
LAKE GREGORY  is open every day for Fishing and Boat Rentals.(click on the link)

For local dispatch information WWW.SOCALMOUNTAINS.COM

For California Fire info

*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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