About Relayweather.com





Station Location

This weather station is located at 39 14' 22.272" (39.23983 North) North and 76 42' 28.613" (-76.70740 West) West about 221ft. above sea level in the southwest Baltimore, Maryland area. This station is centrally located in close proximity to Halethorpe, Arbutus, and Catonsville areas. The University of Maryland Baltimore County (UMBC) is approximately 3 miles from the station. Additionally, this station also serves as a great source of weather information for the Avalon Area Mountain Biking / Hiking Trail system in the Patapsco State Park.

Use map controls to zoom in/out and pan or left click and drag to move the map







Station Equipment

The station is powered by a Davis Vantage Pro2 Model 6153 wireless weather station with 24-hour fan aspirated radiation shield optimally located in the backyard of my home. The station comprises of an anemometer located approximately 33' above the ground on the roof, rain gauge and a thermo-hydro transmitter situated in optimal positions for highest accuracy possible. It is transmitted to a Davis VP2 wireless base station within the home and then connects via USB to my personal computer. The PC uses Weather Display software to capture all the live weather related data.





Actual Station Images
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VP2 Station 1 VP2 Station 2 VP2 Station 3 VP2 Station 4 VP2 Station 5





Vantage Pro2 Integrated Sensor Suite Reception = 99%
Vantage Pro2 Integrated Sensor Suite Battery = 4.8 Volts
Vantage Pro2 Integrated Sensor Suite Battery Status = Ok








About This Website

This website launched in February of 2005. Some of the information on this site is provided by the National Weather Service. and WeatherUnderground. The data from this site is shared with Weather Underground, CWOP (Citizen Weather Observer Program), PWSweather.com, Awekas and Weatherbug. Relay Weather is a proud member of the CoCorahs Network and Mid-Atlantic Weather Network.

Most of the website concepts are display techniques are supported by the folks at the Weather Display Software forums. A stat counter records the amount of visitors to view this site, the statistics can be found at StatCounter.com. All of my current data can be viewed by parsing my clientraw.txt file, click here to see this data.




Station system up for 10 Days 21 Hours 57 Minutes 11 Seconds
Station system free memory 30.40GB
Weather Display last started 3:29:47 AM 3/15/2017

Go to the Station/Site Diagnostics to view current station status






About Relay, Maryland

In 1830 the first railroad track had its debut from Baltimore to Ellicott Mills which ran 13 miles. The first trains were horse-drawn wagons that ran on rails made of wood. Since the distance between the two towns was considered too long for one team of horses, a new team, known as a relay was secured at the halfway point of the trip. The town of Relay was given its name at the spot where the first team of horses were exchanged. Even though Peter Cooper lost the race with the Tom Thumb he started the era of the Iron Horse on August 28, 1830 in Relay.







Benjamin Latrobe designed the Thomas Viaduct and John McCartney, an engineer from Ohio built the bridge. Construction of the "bridge that couldn't be built" took three years. The bridge was named the Thomas Viaduct in honor of Phillip Thomas who was the first president of the B&O Railroad. The bridge stretches 612 feet from Baltimore County to Howard County and is still in use today. A monument stands today, designating government and railroad officials connected to the project.

Samuel Morse's workshop for the telegraph was located at 5128 South Rolling Road. The first commercial telegraph service opened May 24, 1844. The telegraph pole was invented at this time because the stone base of the land was too difficult to dig the normal trench for placement of the telegraph wire.

The Eighth New York and Sixth Massachusetts regiments and Cook's Boston Battery occupied Relay during the Civil War on May 5, 1861. A Civil War fort was located on the property of Margaret Bennett, where her current home is still standing after being constructed in 1800 on Gundry's Lane. In August of 1862 the 138th Pennsylvania Volunteers came to Relay. Their commander was Colonel Sumwalt. The regiment had a total of 36 officers and 820 enlisted men. They made their headquarters at the Relay House and had come to the area to protect the railroad.



Construction began on the Relay Station (Viaduct Hotel) in 1872. The gothic structure was built of Patapsco granite and trimmed in red seneca stone. The two-story porch on the river side of the hotel gave visitors a magnificent view of the Patapsco Valley and the Thomas Viaduct. Due to the decline in train travel the Relay Station was closed in 1938 after 108 years of continuous service. The station was later torn down in the 1950's. In 1964 the Thomas Viaduct was declared a National Historical Landmark.

During World War II Relay was the sight of the first conscientious objector camp in the United States. The men worked in the nearby state park and nursery.


History Courtesy of Arbutus Public Library











Data Accuracy

The positioning and calibration of the weather station sensors has been carefully considered to maximize accuracy of the readings. We use CWOP to help make sure our data is accurate.

CWOP checks weather stations' data against one another to compare quality. This quality checker was developed by Phillip Gladstone (CW0003). Relayweather.com is automatically notified via email if any irregularities are detected. You can view today's check for this station right here.

For those looking to setup their own stations, CWOP offers a guide on station setup and quality assurance. (PDF format)








Website Design

This site is a template design by CarterLake.org with PHP conversion by Saratoga-Weather.org. Thanks go to Kevin Reed at TNET Weather for his work on the original Carterlake templates, and his design for the common website PHP management. Special thanks to Mike Challis of Long Beach WA for his wind-rose generator, Theme Switcher and CSS styling help with these templates. Special thanks to Ken True of Saratoga-Weather.org for the AJAX conditions display, dashboard and integration of the TNET Weather common PHP site design for this site. Additionally, thanks go to Curly of Michiana Weather for providing many NOAA related scripts and the weather records reporting. Links to many of the PHP scripts used on this site can be found here. Template is originally based on Designs by Haran.