Wednesday, May 31, 2017

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TODAY’S WEATHER DISCUSSION AND FORECAST:



Good Morning.
Lake Gregory is now open for the Summer Season.
Today fog and low clouds have moved in across parts of the Rim and adjacent areas. The Marine layer (fog) should remain below the 4500-5000′ level today. An area of low pressure will bring showers through most of California today and as far south as Northern Santa Barbara County. Here locally, we may see a light shower as the system passes over the mountain area along with drizzle from the Rim to the coastal locations. Later today, upper level clouds from 10-25,000′ will give us mostly cloudy skies and much cooler temperatures. Yesterday’s expected cooler temps didn’t really materialize as high temps across most of the area were very close to the previous days. Today highs will be in the mid 60s for most areas with increasing upper level clouds becoming mostly cloudy by the afternoon hours. Tomorrow, we will slowly clear as the area of low pressure will slowly move East with high pressure filling in behind the departing low. Temperatures will warm back up, and by Friday, we should be in the mid to upper 70s through the weekend. RC
On the WX/Alerts and Trends page, I have posted a really good video of the Yosemite Valley rivers and falls during this winters rainy season. It’s worth watching.

Tuesday, May 30, 2017

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TODAY’S WEATHER DISCUSSION AND FORECAST:



Good Morning.
Lake Gregory is now open for the Summer Season. (www.lakegregoryrecreation.com)
Today’s Weather outlook for the Crestline, Lake Arrowhead, Running Springs, and Big Bear areas of the San Bernardino Mountains.
Low clouds and fog have moved into the IE this morning as the Marine layer thickens due to an area of low pressure moving through SoCal. Above the 3000′ level, we continue to see a temperature inversion that should keep the Marine layer capped at or about the 3000k’ today. Temperatures across the mountain will be cooler today with the passing of the weak trough of low pressure. Highs locally today should be around the low to mid 70s. Yesterdays highs ran from 76* in Running Springs to 86* in the Valley of the Moon area of Crestline. Today, high temps will be from 5-10* cooler than Monday’s. Some upper level clouds will pass through today as the low pressure trough moves south through the area. Tomorrow, cooler air will bring high temps down a few more degrees as a second weak trough passes through SoCal. We should see partly to mostly cloudy skies tomorrow with a deeper Marine layer possibly up to the 4500-5500 foot elevation locally. Some drizzle along with wet roads will be possible in some areas that are in the Marine layer tomorrow morning. Thursday, as the trough of low pressure moves out, a ridge of high pressure will begin to build over the SoCal region. Temperatures will slowly rebound as the high strengthens with near normal temperatures forecast for the upcoming weekend. At this time, there is no rain of any significance in the five day forecast window for SoCal. RC
On the WX/Alerts and Trends page, I have posted a really good video of the Yosemite Valley rivers and falls during this winters rainy season. It’s worth watching.
On another note, I have placed a “DONATE” button at the top of all of the pages in this website. Any donations collected will go directly to help with the ongoing costs of maintaining this website. If you would like to help with those costs, click on the button and it will take you to the donate page of options. Thank You. RC

Monday, May 29, 2017

TODAY’S LATEST SATELLITE PICTURES:


TODAY’S WEATHER DISCUSSION AND FORECAST:



Good Morning.
Lake Gregory is now open for the Summer Season. (www.lakegregoryrecreation.com)
Today’s Weather outlook for the Crestline, Lake Arrowhead, Running Springs, and Big Bear areas of the San Bernardino Mountains.
Once again this morning, there is a temperature inversion running at around the 3500′ level. Temperatures in the Valley are running cooler than the mountain, and humidity levels due to the Marine influence are much higher. This morning we have mostly clear skies across SoCal. High level clouds from 20-30k’ will pass through today from an area of low pressure over the Pacific, off of Canada. As this area of low pressure slowly moves onshore to our North, a long wave trough will extend south to SoCal giving us high clouds today and most likely tomorrow as well. A South West flow will strengthen over the next couple of days, and it looks like a Catalina Eddy will also develop. This will help to deepen the Marine layer, and the Catalina Eddy will help to push it Inland possibly to the IE for Tuesday and Wednesday mornings. The area of High pressure that has brought us warm temperatures and a very nice Holiday weekend here, will slowly retreat West over the Pacific Ocean for the next few days as low pressure moves through. Temperatures today and Tuesday will be very close to what we had yesterday. Highs will be in the mid to upper 70s with possibly 80* in the warmer areas above the 4000′ level to the 7000′ level with overnight lows in the upper 40s at the higher elevations to the low to mid 50s for Crestline and Arrowhead. Wednesday should be the coolest day of this week as we pick up a NE flow behind the departing Low. Thursday through the weekend, a warming trend will begin once again as High pressure builds into the West Coast of California. The Desert areas North and East of the Mountains will continue to be very warm through the period with a Northerly flow at the surface. If you are headed to the Sierras, Wednesday looks like the best chance for Thunder Showers, from Reno south to Death Valley.
On the WX/Alerts and Trends page, I have posted a really good video of the Yosemite Valley rivers and falls during this winters rainy season. It’s worth watching.
On another note, I have placed a “DONATE” button at the top of all of the pages in this website. Any donations collected will go directly to help with the ongoing costs of maintaining this website. If you would like to help with those costs, click on the button and it will take you to the donate page of options. Thank You. RC

Sunday, May 28, 2017

TODAY’S LATEST SATELLITE PICTURES:


TODAY’S WEATHER DISCUSSION AND FORECAST:



Good Morning.
Lake Gregory is now open for the Summer Season. (www.lakegregoryrecreation.com)
Today’s Weather outlook for the Crestline, Lake Arrowhead, Running Springs, and Big Bear areas of the San Bernardino Mountains.
This morning, a temperature inversion is in place across the SoCal area. Temperatures on the mountain are currently as of 9:30am at or about the peak temperature we reached yesterday, around the mid 70s*. In San Bernardino and Waterman Canyon currently, the temperature is in the mid 60s. So due to the temperatures inversion, we are warmer than the Valley at this time. Humidity levels in the Valley are in the 60% range with a SW flow, as you go up in elevation the humidity levels are lowering with Twin Peaks at 58% and Big Bear at 19% with a NE flow. So as you can see, the upper elevations are much dryer and warmer this morning, than the Valley at this time. The Marine influence is still at the lower elevations while above the inversion, we have a NE flow with much dryer air. This will aid in the warming of the upper elevations today with highs expected to be from 5-8* warmer than yesterdays high temperatures across the mountain. Highs today across the mountain regions are expected to be in the mid to upper 70s with the possibility of reaching into the low 80* temperatures in the warmest areas. This trend will remain in place through Tuesday, which should be our warmest day of the next five. Warm weather and variable winds alternating from the SW to the NE as the Desert areas warm and cool creating our wind shifts, will be the outlook through Tuesday. This all due to an area of High Pressure (580dm) aloft that will remain in place through that period. Wednesday, a weak trough of low pressure will slowly make it’s way South from the North Pacific passing through the area Wednesday and Thursday. This will again deepen the Marine layer and possibly pushing fog and low clouds to the front side of the Mountain. Then, we will return to a warmer period through the weekend. On the WX/Alerts and Trends page, I have posted a really good video of the Yosemite Valley rivers and falls during this winters rainy season. It’s worth watching.
On another note, I have placed a “DONATE” button at the top of all of the pages in this website. Any donations collected will go directly to help with the ongoing costs of maintaining this website. If you would like to help with those costs, click on the button and it will take you to the donate page of options. Thank You. RC

Saturday, May 27, 2017

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TODAY’S WEATHER DISCUSSION AND FORECAST:



Good Morning.
Today’s Weather outlook for the Crestline, Lake Arrowhead, Running Springs, and Big Bear areas of the San Bernardino Mountains.
Clear skies and a light breeze with warmer temperatures today, will be the Forecast for the local mountain areas. Yesterday’s cloud cover moved out quicker than I had figured, so we ended up having a pretty nice day. Today, we will warm up by a few degrees over yesterday, with high temperatures expected to be in the mid to upper 60s for the 4500-7000′ level. There are a few clouds floating around the bottom of the hill this morning as can be seen on the webcam page but other than that, it will be a nice day. Today, Lake Gregory opens their water park, and the swimming area. They are having a Trout Derby this weekend as well. You can go to www.lakegregoryrecreation.com for all the activities for this Summer. We will continue to have really nice weather for the Holiday weekend as temperatures will slowly climb to the mid to upper 70s by Monday and Tuesday. The skies will remain clear through the weekend with variable winds. Overnight low temperatures will run from the mid 40s to low 50s. On the longer range outlook, an area of low pressure will move on to the West Coast Wednesday. This will bring a change in our weather with cooler temperatures and a deeper Marine layer extending into the Inland valleys. Also there will be a chance for a light shower Wednesday and Thursday morning as it looks at this time.
On another note, I have placed a “DONATE” button at the top of all of the pages in this website. Any donations collected will go directly to help with the ongoing costs of maintaining this website. If you would like to help with those costs, click on the button and it will take you to the donate page of options. Thank You. RC

Friday, May 26, 2017

TODAY’S LATEST SATELLITE PICTURES:


TODAY’S WEATHER DISCUSSION AND FORECAST:



Good Morning.
Today’s Weather outlook for the Crestline, Lake Arrowhead, Running Springs, and Big Bear areas of the San Bernardino Mountains.

The GOES-R-16 visible sat/pic shows the total cloud cover over the Western portions of SoCal and beyond. Surface Low pressure over the Great Basin @ 1005.5mb this morning coupled with a 1015.4mb surface pressure at San Diego will keep a South West flow in place today through tomorrow early afternoon. The Marine layer is running from the ~3000′ level to around the ~6200′ level this morning, so expect to have fog along the Rim today below the 6200′ level. If you head North from the Rim, mostly clear skies will be the forecast. West and South of the Mountains, fog and low clouds will be the forecast all the way to the coast. An area of low pressure will slowly move to the East tomorrow, as it does, High pressure will build in behind the departing low bringing a warming trend through mid week next week. The SW winds will be replaced by a NE flow beginning Saturday afternoon. This will be the start of the warming trend locally. Today high temperatures will be in the mid to upper 50s for most areas. Tomorrow, High temps will be from 5-9* warmer and again on Sunday with highs expected to be in the mid to upper 70s for Sunday and Monday. If you are going to Big Bear, the Marine layer is far below their elevation and todays highs will be in the mid to upper 60s with warmer temps through the Holiday weekend there. Yesterday, Big Bear had the warmest high temperature across the mountain with 71*. On the long range outlook, a cut off low is likely to form off of SoCal and the West Coast next Thursday. At this time, it looks like it will remain over the area for a couple days bringing a change in weather at that time. Possibly rain and or Thunder storms for our area. On another note, I have placed a DONATE BUTTON at the top of all of the pages in this website to help with the ongoing costs of maintaining this website. If you would like to help with those costs, click on the button and it will take you to the donate page of options. Thank You. RC

Thursday, May 25, 2017

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TODAY’S WEATHER DISCUSSION AND FORECAST:



Good Morning.
Today’s Weather outlook for the Crestline, Lake Arrowhead, Running Springs, and Big Bear areas of the San Bernardino Mountains.
As an area of low pressure moves onshore in SoCal today, fog and low clouds will fill the Valley and bring periods of fog along the Rim. Temperatures will be much cooler again today with highs expected to be in the upper 50s to low 60s for most areas. A South West flow will strengthen today with winds from 5-15 mph becoming gusty and increasing later today with gusts to 25mph~ in the wind prone areas. Overnight low temperatures will be in the upper 30s to low 40s across the area. Friday, fog and clouds will fill the sky with a chance for a rain shower or drizzle throughout the day. Daytime high temperatures will remain cool with highs in the upper 50s to low 60s locally. No measureable rain is expected but there will be enough moisture to wet the streets so drive carefully. Saturday, the area of low pressure will move East, as it does, we will have clearing skies with High pressure returning to the SoCal area. Much warmer temperatures for the Holiday weekend and lots of sun will be the weekend forecast for the mountain region. High temperatures are expected to rebound to the upper 70s by Monday, Memorial Day. Have a good day, and enjoy the always changing mountain weather. RC

Wednesday, May 24, 2017

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TODAY’S WEATHER DISCUSSION AND FORECAST:



Good Morning.
Today’s Weather outlook for the Crestline, Lake Arrowhead, Running Springs and Big Bear areas of the San Bernardino Mountains.
Low pressure off of the SoCal coast will merge with an area of low pressure to our North over the next 24hours. This will bring in much cooler weather and an increase in the Marine layer along with gusty South West winds for the next couple of days. Mid and high level clouds will filter in across the area today as the area of low pressure arrives. Temperatures for today will be from 10-15 degrees cooler than Tuesdays highs that were in the mid to upper 80s across most of the mountain locations. For Thursday morning, the Marine layer should be around 3500-5000′ deep against the front of the mountain. Gusty south west winds will develop from 10-20mph with stronger gusts in the wind prone areas. A winds advisory may be needed locally. Fog along the Rim will develop late Thursday and for Friday morning with fog and low clouds expected to reach up to the 6000-6500′ level. This deep Marine layer will likely bring drizzle and a chance for a light rain shower below the 6500′ level for Friday morning. For Saturday and the rest of the Holiday weekend, clearing skies will begin on Saturday along with a warming trend through Monday with Mondays high temperatures expected to be in the upper 70s locally. Have a good day and enjoy the always changing mountain weather. RC

Tuesday, May 23, 2017

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TODAY’S WEATHER DISCUSSION AND FORECAST:



Good Morning.
Today’s Weather outlook for the Crestline, Lake Arrowhead, Running Springs and Big Bear areas of the San Bernardino Mountains.
Yesterday’s high temperatures across the mountain were quite warm. Daytime highs ran from 77* in Twin Peaks, to 88* in Deer Lodge Park, and in Arrowhead and Crestline, temperatures were in the low 80s. Today, will be pretty close to the same for the days high temperatures before a big cool down begins for tomorrow. We will have an increase in high clouds this afternoon showing a change in the weather is coming. An area of low pressure will move onshore later this evening bringing in a deep Marine layer that will spread from the coast tonight to the Inland valleys by Thursday and Friday. A strong onshore flow will develop later today through Friday with gusty SW winds across all of the mountain locations. Along with a deepening marine layer, MUCH cooler temperatures will be the forecast through Friday. Today highs will be in the low to mid 80s for the mountain region, while tomorrows highs will be about 10* cooler, and another 10* cooler for Thursday and Friday. Fog will push up against the front country and be up to 5500″ deep by Thursday and Friday. This will give us a chance for light rain or heavy drizzle along the Rim and most areas below the 5500′ level from the Rim to the coast. So expect to have wet roads for the morning travels both days. Saturday and for the Memorial Day weekend, we will have a warming trend as high pressure returns to SoCal with temperatures returning to above normal by Memorial Day, Monday. RC

Monday, May 22, 2017

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TODAY’S WEATHER DISCUSSION AND FORECAST:



Good Morning.
Today’s Weather outlook for the Crestline, Lake Arrowhead, Running Springs and Big Bear areas of the San Bernardino Mountains.
Temperatures today will continue to hover around the 80* mark for much of the mountain. The valley will be in the mid to upper 90s through Wednesday. High pressure over the Great Basin will continue to give us warmer than normal weather through Wednesday. Winds will alternate from offshore in the morning hours to onshore in the afternoon hours. Wednesday, increasing cloud cover and a chance for a T-Storm as a weak area of vorticity moves through California sliding south from the Sierras. Thursday, a trough of low pressure will move onshore from the West, into SoCal, initiating a cooling trend that will last through Friday or Saturday. As the area of low pressure arrives, clouds and fog will push into the Inland Valleys and up against the slopes of the front country. We may see some fog along the Rim on those days, as well as much cooler temperatures. There will be a couple of chances for a light rain shower, first on Wednesday, from possible convective activity along and south of the Sierras that may reach our area, and again on Thursday and Friday mornings as the area of low pressure moves through the SoCal region deepening the Marine layer to around 6500′. Temperatures for Thursday and Friday will be in the low 70s or upper 60s with lots of clouds likely. So it looks like we will have a variety of weather for the work week ahead. Enjoy. RC