Our Proprietary 10-Day Forecast

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Current warnings over Mountain Top Junction, California
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<p>Warnings from F5Weather</a></div>

United States weather warnings are issued by various organizations under NOAA. Most from the National Weather Service, but also Storm Prediction Center and National Hurricane Center.

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Current radar over Mountain Top Junction, California red dot
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<p>Live radar from F5Weather</a></div>

Our radar is based off of US NEXRAD and Canadian weather radar sites through the quality controlled MRMS system. It compiles various sources for radar data and filters out erroneous returns such as sun spikes and ground clutter. We then colorize the precipitation based on our methods for determining precipitation type. Rain is in shades of green, mixed precipitation and freezing rain in shades of pink and snow is in shades of blue.

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Current satellite over Mountain Top Junction, California red dot
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<p>Live satellite from F5Weather</a></div>

Our satellite is from the GOES-16. It is color enhanced by using a geocolor terrain background during the day and black marble city lights at night. The daytime satellite data is Visible satellite imagery, and nighttime uses Infrared bands. The bluish clouds are fog and low cloud. The whiteest clouds are the coldest, highest cloud tops.

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Current surface weather map around San Bernardino County, CA

This surface map is from the HRRR computer model. It is a 1-hour forecast, updated hourly, which is a good estimate of the current surface conditions. This map shows the current high and low pressure centers, pressure isobar contours, wind streamlines and thickness contours. It also shows the currently depicted preciptiation estimates, although this should not be a substitute for actual live radar. The purple dashed contour is the 5400m thickness line, which is often a good proxy for the rain/snow line.

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Temperatures right now near Mountain Top Junction, California

This is the latest surface temperatures as depicted by the HRRR computer model, updated hourly. Although these are not actual observations, this model is a very good representation of current conditions as it factors in observations, terrain and physics to give you more detailed temperatures in areas that do not have reporting weather stations. For the latest reports at specific locations, like in Mountain Top Junction, CA please see our current conditions data on the left and right side of this page, or go to our current conditions page.

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Surface wind speed map over Mountain Top Junction, CA

This map shows the latest HRRR computer model winds. This depiction of the current wind directions and speeds is an estimate from the computer model. For actual observations in Mountain Top Junction, CA, see the current conditions data on the left and right side of this page, or go to our current conditions page.

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Regional 24 hour rainfall expected near Mountain Top Junction, California

This is a forecast of the amount of precipitation expected over the next 24 hours from the HRRR weather forecast model. This is only one forecast depiction, and you should check other models to get a better idea of what may happen. You can view this and other models in more detail on our main weather forecast maps page. There, you will also be able to look at forecasts beyond just 24 hours and look at forecasts out to as far as 16 days.

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Area snowfall accumulation expected around San Bernardino County, California

This is snowfall forecast, with amounts anticipated in the next 24 hours. This guidance is from the HRRR weather model. For more model forecasts out to 16 days, visit our main weather forecast maps page.

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These are Convective Outlooks from the Storm Prediction Center. Click to see Days 1-3 broken down into Tornado, Wind and Hail threats, as well as days 5-8 outlooks.

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Atlantic Hurricane and Tropical Storm Tracking Map
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<p>Hurricane Tracking from F5Weather</a></div>

Our hurricane tracking map monitors for any current or forecast tropical disturbances in the Atlantic. (See our Pacific Hurricane Tracker) Various hurricane models will draw a 'spaghetti plot' in the Atlantic Basin when a disturbance is forecast or exists, showing the system's forecast track. Once a storm has developed, the National Hurricane Center will forecast their official track. This will show up on the map along with the storm's current intensity, track and name. We will also plot some of the storm's vitals and of course the spaghetti plots from the models along with the NHC forecast track will give you an idea of where it's heading, and its forecast intensity with time.

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To view the latest computer models, visit f5wx.com for access to the weather maps and guidance that meteorologists use to make their forecasts.
 
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  • American GFS
  • Canadian GDPS GEM
  • German DWD ICON
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  • GEFS, GEPS, MOGREPS & European Ensembles
  • Probabilities & Averages
  • 3-Ensemble Mean & more!
View Skew-T soundings, textual data tables for your location, and of course maps! Weather forecast maps of the basics like temperature, wind, pressure, humidity, dew point, cloud cover, simulated radar, travel weather, rainfall and snow are available. More advanced users can also get use out of our severe weather & tornado threat maps, as well as upper air & shear graphics.
 
See the latest forecast data as the models update.
 
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Climate Summary
(made with AI, use with caution)
Mountain Top Junction, CA, located in the Southern Sierra Nevada Mountains, experiences a Mediterranean climate characterized by hot, dry summers and mild, wet winters. Here's a summary of its climate:

Temperature


    •   Average Annual Temperature: 56.4°F (13.6°C)
    •   Average Summer Temperature (June     •   August): 75.2°F (24°C)
    •   Average Winter Temperature (December     •   February): 36.8°F (2.7°C)
    •   Record High Temperature: 108°F (42.2°C)
    •   Record Low Temperature: -17°F (-27.2°C)

Precipitation


    •   Average Annual Precipitation: 20.5 inches (52.1 cm)
    •   Average Rainy Days per Year: 65
    •   Average Snowfall per Year: 5.8 inches (14.7 cm)
    •   Wettest Month: February (3.8 inches or 9.7 cm)
    •   Driest Month: July (0.1 inches or 0.3 cm)

Humidity


    •   Average Annual Humidity: 57%
    •   Highest Humidity Month: January (69%)
    •   Lowest Humidity Month: July (39%)

Wind


    •   Average Wind Speed: 5.1 mph (8.2 km/h)
    •   Prevailing Wind Direction: West-Southwest

Climate Classification


    •   Köppen Climate Classification: Csa (Mediterranean Climate with Hot, Dry Summers)

Notable Climate Features


    •   Mountain Top Junction experiences a significant difference in temperature between day and night, especially during the summer months.
    •   The area is prone to occasional thunderstorms during the summer, which can bring heavy rain and lightning.
    •   Wildfires can occur during the hot, dry summer months, particularly in the surrounding mountainous regions.
    •   The region is known for its beautiful scenery and outdoor recreation opportunities, including hiking, camping, and fishing.

Facts & Historical Information
(made with AI, use with caution)
Mountain Top Junction, California, a former settlement in the San Bernardino Mountains, holds a captivating history entwined with science and nature.

In the late 19th century, the area became a hub for astronomers and scientists. The clear skies and high elevation provided ideal conditions for observing celestial bodies. Astronomer Edwin Hubble established an observatory here in 1919, where he made groundbreaking discoveries about the expanding universe.

The region also boasts a rich natural history. The San Bernardino Mountains are home to diverse flora and fauna, including the endangered California condor and the rare San Bernardino Mountain kingsnake. The area's unique geology, shaped by volcanic activity and erosion, has created scenic landscapes, including the iconic \

Tourist Attractions
1.Yosemite National Park:

A breathtaking natural wonder with towering granite cliffs, cascading waterfalls, and giant sequoia trees. It's located about an hour's drive from Mountain Top Junction.

2.Mammoth Mountain Ski Area:

A renowned ski resort with world-class slopes, stunning views, and a variety of winter activities. It's about 45 minutes away from Mountain Top Junction.

3.June Lake Loop:

A scenic 35-mile drive that takes you through the beautiful June Lake Loop area, offering stunning views of the Sierra Nevada mountains and pristine lakes.

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