La Nina 2017/2018, update.

The Climate Prediction Center has issued a La Nina Advisory  as of November 9th, 2017. Currently, conditions including Sea Surface Temperatures along the Equator and Eastern Pacific, Trade winds across the Pacific basin, and Outgoing Longwave Radiation anomalies, consistent with La Nina have developed. These conditions are expected to last through the rest of this year and into April of 2018. Below are two maps of the ENSO phases.

As we head into the Winter months, La Nina usually means less frequency of Winter storms for the SoCal region, especially wet multi day systems that would come from the south.  Along with the typically dryer  season, warmer temperatures are also associated with La Nina as well. But this is not always the case for the mountains of SoCal. The storm track will be less likely to produce long duration wet systems into our area however, the systems we will get originate to our North and contain cold air. So even though we will typically get less moisture in the storms that do make it to SoCal, they will likely be colder.  Colder systems means lower snow levels. In La Nina seasons of the past, we have seen a variety of outcomes. One was the Winter of 1991 when we had 10 feet of snow during March (The March Miracle) in Twin Peaks. Prior to March, we had only a few storms that were very weak. Other years locally, we have had La Nina seasons that brought several systems with snow to the lower elevations with only small accumulations. So overall, we will likely see more frequency of snow to rain, somewhat less then average total rainfall (including melted snow) along with more North East winds. As the storm track takes most of the systems to our North, we will only get the winds along the backside of the low through the SoCal mountains. Cold Winds will be very likely through late winter. When we get to Spring, this is when we can get very wet systems into SoCal. As the seasons change, and the storm cycle changes as well, strong storms can be drawn up fro the South, and converge with cold and weaker systems form the North. This was the recipe that brought the March Miracle to SoCal in 1991.  So overall, we will have to wait and see what Mother Nature brings us.

Thank You, for visiting Lake Gregory Weather ( ). Your local source for Weather information in the San Bernardino Mountains.

Provided above are current weather outlooks for Crestline to Big Bear, that are issued by the National Weather Service including, Warnings, and Watches. These are posted daily or as needed. Along with the Current Trends are, “This Day in History”, posted along side of any Alerts or Weather Warnings that are pertinent for the Crestline and other Mountain Communities around the Lake Arrowhead to Big Bear areas. Such as, Thunder Storm Warnings, Snow, or Winter Weather Warnings, High Wind Warnings or Advisories for the San Bernardino Mountain communities that have been issued by the National Weather Service. Also the latest Drought information for California as well as a general five Day Precipitation and Temperature Forecast for all of California. The Weather in the San Bernardino Mountain Communities varies greatly by elevation and location. We have the Deep Creek area to the North of the Lake Arrowhead area where Hiking, Camping, and Off Road activities, that all can be impacted by quick moving Summer Storms, and any other outdoor activities in those areas. We also have several lakes for recreation such as, Lake Gregory, Lake Arrowhead, Green Valley Lake as well as Big Bear Lake, where swimming, fishing, and boating can be impacted by local Weather events anytime of the year. So along with the main page for, this is also a good source of information for the San Bernardino Mountain Communities at a quick glance.