Our Proprietary 10-Day Forecast

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Current warnings over Jefferson, Maryland
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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 Jefferson, Maryland 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 Jefferson, Maryland 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 Frederick County, MD

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 Jefferson, Maryland

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 Jefferson, MD 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 Jefferson, MD

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 Jefferson, MD, 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 Jefferson, Maryland

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 Frederick County, Maryland

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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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.
 
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Climate Summary
(made with AI, use with caution)
Jefferson, MD Climate Summary

Jefferson, Maryland has a humid continental climate, with hot, humid summers and cold, snowy winters. The average annual temperature is 53.3°F, with an average high of 62.8°F and an average low of 43.8°F.

Summer

Summer temperatures in Jefferson are typically hot and humid, with average highs in the upper 80s and low 90s. The average July temperature is 77.8°F, with an average high of 89.1°F and an average low of 66.5°F. Heat waves are common in the summer, with temperatures sometimes reaching into the 100s.

Winter

Winter temperatures in Jefferson are typically cold and snowy, with average lows in the 20s and 30s. The average January temperature is 32.2°F, with an average high of 40.3°F and an average low of 24.1°F. Snowfall is common in the winter, with an average of 23.6 inches per year.

Spring and Fall

Spring and fall temperatures in Jefferson are typically mild, with average highs in the 50s and 60s and average lows in the 30s and 40s. The average April temperature is 50.6°F, with an average high of 62.1°F and an average low of 39.1°F. The average October temperature is 52.6°F, with an average high of 64.4°F and an average low of 40.8°F.

Precipitation

Jefferson receives an average of 42.6 inches of precipitation per year, which is fairly evenly distributed throughout the year. The wettest month is May, with an average of 4.3 inches of precipitation. The driest month is February, with an average of 2.5 inches of precipitation.

Severe Weather

Jefferson is located in an area that is prone to severe weather, including thunderstorms, tornadoes, and hail. Severe thunderstorms are most common in the summer months, while tornadoes and hail can occur at any time of year.

Climate Change

The climate of Jefferson is changing, as is the climate of the entire planet. The average temperature in Jefferson has increased by about 1.5°F over the past century, and this trend is expected to continue. The increase in temperature is leading to more extreme weather events, such as heat waves, droughts, and floods.

Facts & Historical Information
(made with AI, use with caution)
Natural History

    •   Jefferson is home to the Jefferson Marsh Natural Environment Area, a 1,000-acre wetland complex with diverse flora and fauna.

    •   The area is a breeding ground for migratory birds, including bald eagles, osprey, and great blue herons.

Science

    •   The National Institute of Standards and Technology (NIST) has a major campus in Jefferson.

    •   NIST researchers have made significant contributions to fields such as metrology, materials science, and computer security.

Personalities

    •   Thomas Jefferson, the third U.S. President, visited Jefferson in 1803 and remarked on the area's natural beauty.

    •   John Quincy Adams, the sixth U.S. President, also visited Jefferson and described it as \

Tourist Attractions
1.Harpers Ferry National Historical Park

(Harpers Ferry, WV): This park preserves the site of the famous 1859 raid by abolitionist John Brown, which helped spark the American Civil War. Visitors can explore the historic town, learn about the raid, and hike or bike along the scenic Appalachian Trail.

2.Antietam National Battlefield

(Sharpsburg, MD): This battlefield is the site of the bloodiest single-day battle in American history, fought on September 17, 1862. Visitors can tour the battlefield, learn about the battle, and visit the nearby National Cemetery.

3.C&O Canal National Historical Park

(Potomac, MD): This park follows the historic Chesapeake and Ohio Canal, which was built in the 19th century to transport goods between Washington, D.C. and Cumberland, MD. Visitors can hike or bike along the towpath, explore the canal locks, and learn about the history of the canal.

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