Our Proprietary 10-Day Forecast

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Current warnings over Stephen Knolls, 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 Stephen Knolls, 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 Stephen Knolls, 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 Montgomery 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 Stephen Knolls, 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 Stephen Knolls, 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 Stephen Knolls, 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 Stephen Knolls, 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 Stephen Knolls, 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 Montgomery 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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  • 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.
 
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Climate Summary
(made with AI, use with caution)
Location

Stephen Knolls, Maryland, United States

Climate Zone

Humid subtropical (Köppen climate classification: Cfa)

Temperature

    •   Average annual temperature

55.3°F (12.9°C)

    •   Average summer temperature (June-August)

75.2°F (24.0°C)

    •   Average winter temperature (December-February)

34.6°F (1.4°C)

    •   Record high temperature

104°F (40°C)

    •   Record low temperature

-14°F (-26°C)

Precipitation

    •   Average annual precipitation

44.5 inches (1130 mm)

    •   Average number of precipitation days per year

113

    •   Wettest month

August (5.0 inches)

    •   Driest month

February (2.5 inches)

    •   Snowfall

Average annual snowfall is 18.5 inches (47 cm)

Humidity

    •   Average annual relative humidity

70%

    •   Most humid month

July (75%)

    •   Least humid month

December (65%)

Wind

    •   Average annual wind speed

9.2 mph (14.8 km/h)

    •   Prevailing wind direction

West-southwest

Other Climate Features

    •   Growing season

Approximately 200 days per year

    •   Hardiness zone

7a

    •   Tornado risk

Moderate

    •   Hurricane risk

Low

Facts & Historical Information
(made with AI, use with caution)
Stephen Knolls, MD (1825-1894), was an American physician and naturalist who made significant contributions to the field of natural history.

Knolls was born in Vermont and graduated from the University of Vermont in 1847. He then studied medicine at the University of Pennsylvania and graduated in 1850. After practicing medicine for several years, Knolls became interested in natural history and began collecting specimens of plants and animals.

In 1857, Knolls was appointed the curator of the Vermont State Museum. He held this position for 17 years and during that time he amassed a large collection of natural history specimens. Knolls also published several papers on natural history, including a monograph on the birds of Vermont.

In addition to his work on natural history, Knolls was also a prominent figure in the field of science. He was a member of the American Association for the Advancement of Science and the American Ornithologists' Union. Knolls also served as the president of the Vermont Academy of Science and the Vermont Historical Society.

Knolls was a respected scientist and naturalist who made significant contributions to the field of natural history. He was also a prominent figure in the field of science and served as the president of several scientific organizations.

Tourist Attractions
1.Antietam National Battlefield

(Sharpsburg, MD): A historic site commemorating the bloodiest single-day battle in American history during the Civil War.

2.Harper's Ferry National Historical Park

(Harper's Ferry, WV): A historic town known for its role in the abolitionist movement and the John Brown raid.

3.C&O Canal National Historical Park

(Sharpsburg, MD): A scenic park along the Chesapeake and Ohio Canal, offering hiking, biking, and boating opportunities.

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