About the River Valley Orchidworks Clarksville Weather Station

The data for the Weather portion of our website are generated by a Davis Vantage PRO2 Plus weather station which is pole-mounted in a field behind our home. The station was put into operation on September 19, 2012. Most data are collected every 3 seconds and the website is updated every 30 minutes except for real-time displays which are updated every 4 to 6 seconds. The Vantage PRO2's sensors measure Outdoor Temperature, Outdoor Humidity, Wind Speed, Wind Direction, Rainfall (Precipitation), Barometric Pressure, Indoor Temperature, Indoor Humidity, Solar Radiation, and UV Radiation. Sensors are situated in optimal positions to obtain the highest accuracy possible at our location. Raw data are uploaded using Weather Display Software.

Cloud cover during the day is derived from the station's solar sensor: readings from the sensor are taken once per minute and the values compared against the maximum solar radiation calculated for our latitude, longitude, and time of day. After compensating for atmospheric attenuation, the twelve minute average of these readings is then used to set the Current Conditions icon and description. From one-and-a-half hours before sunset, overnight, and until 60 minutes after sunrise the next morning, the cloud cover icon and description are determined through data published from a nearby METAR station, either KRUE in Russellville or KFSM in Fort Smith. Because of prevailing weather patterns, the Fort Smith METAR is usually more accurate for estimating cloud cover at our location, even though, at a distance of 48 miles west, KFSM is further from us than KRUE, located 28 miles east. During periods of rainfall, precipitation is updated immediately with each 0.01 inches of rain received. The station's thermo-hydro sensors are mounted inside a shielded, fan aspirated housing to minimize measurement error due to solar radiation. Temperature is accurate to within +/- 1 degree Fahrenheit.

Station forecasts are issued through the use of WxSim software, an "Interactive Local Atmospheric Modeling System" developed over the past 25 years by meteorologist and physics professor, Thomas Ehrensperger. Local station data are compiled with data from 250 other stations within a 1200 mile radius as well as with GFS model data to produce our local Clarksville weather forecast. When comparing high/low temperature forecasts versus station actuals, WXSIM forecasts plotted beside official NWS forecasts reveal WXSIM to be a robust system capable of producing highly reliable results, especially over the short term (1-3 days.)

The station's WeatherCam is a GE 45255 Video Monitoring System mounted behind a north-facing window. Still images are captured every ten seconds and combined to create the Last Hour and All Day videos featured on the RVO WeatherCam page.

Station data are uploaded every ten minutes to the Citizen Weather Observer Program (E1127), every fifteen minutes to the WeatherMap Live Mesonet (WD02750) as well as to Weather Underground (KARCLARK3) in near real-time.

About the City of Clarksville

Clarksville is located on Spadra Creek, north of the Arkansas River. Although not on the banks of the river, and without the initial economic importance of the river communities, it grew steadily as the county seat. When stagecoach and train transportation became more common, land routes from Little Rock (Pulaski County) to Fort Smith (Sebastian County) were directed through Clarksville, which evolved as an important stop. Development of important educational opportunities began with the organization of the town and continue to the present day. A broad mix of agriculture, mining, and manufacturing has supported the town's growth.

Clarksville today represents a mix of agricultural and college town environments. Tyson's poultry facilities are the largest single employer. The University of the Ozarks is now home to the Walton Fine Arts Center and Walker Hall, both cutting edge facilities for theatre and broadcast journalism, respectively. The peach industry is celebrated by the annual Johnson County Peach Festival. Recreation facilities associated with the Ozark National Forest, local lakes, and the McClellan-Kerr Arkansas River Navigation project offer new opportunities for the growth of tourism.

About The RVO Live Weather portion of our website

This portion of our site is a template design by CarterLake.org with PHP conversion by Saratoga-Weather.org.
Special 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 go 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.

Template is originally based on Designs by Haran.

This template is XHTML 1.0 compliant. Validate the XHTML and CSS of this page.