About Nelson Weather

Our Mission and Weather Data Sources

Nelson Weather began in 2018 as a grassroots effort to provide hyperlocal weather information that goes beyond regional forecasts. While national weather services offer valuable broad-area predictions, local conditions often vary significantly due to terrain, elevation differences, and proximity to water features. Our network of weather observation stations throughout Nelson and surrounding areas captures these microclimatic variations, providing residents with more accurate and relevant weather information for their specific locations.

We aggregate data from multiple authoritative sources to ensure accuracy and reliability. Primary data feeds come from the National Weather Service observation network, which maintains professional-grade equipment calibrated to strict standards. We supplement this with readings from our own certified weather stations positioned at carefully selected locations that represent different elevation zones and land use patterns. Each station reports temperature, humidity, wind speed and direction, barometric pressure, precipitation, and solar radiation every 5-15 minutes.

Our forecast models incorporate data from NOAA's National Centers for Environmental Prediction, including the Global Forecast System (GFS), North American Mesoscale (NAM) model, and High-Resolution Rapid Refresh (HRRR) model. Rather than relying on a single model, we analyze multiple model outputs and apply statistical techniques that account for each model's historical performance in our specific area. This ensemble approach reduces forecast errors compared to using any single model alone.

Quality control procedures run continuously on incoming data, flagging suspicious readings that may indicate sensor malfunctions or temporary obstructions. Automated checks compare each station's reports against nearby stations and historical patterns for that location and time of year. Questionable data gets flagged for manual review before inclusion in our databases. This rigorous quality assurance ensures that forecast models receive accurate input data, which directly improves prediction quality. You can learn more about how we interpret and present this data on our FAQ page.

Weather Monitoring Technology and Accuracy Standards

Accurate weather observation requires properly sited and maintained equipment following guidelines established by the World Meteorological Organization and National Weather Service. Temperature and humidity sensors must be positioned 4-6 feet above ground in a ventilated radiation shield that prevents direct sunlight and precipitation from affecting readings. Our stations use aspirated shields with small fans that pull air past sensors, eliminating the heating errors that can occur in passive shields during calm, sunny conditions.

Wind measurements present unique challenges because wind speed and direction vary considerably with height and local obstructions. Standard practice calls for anemometers mounted 33 feet above ground in open terrain, though practical considerations often require compromises. Our stations position wind sensors at least 20 feet high, away from buildings and trees that create turbulent airflow. We apply correction factors based on each site's specific surroundings to estimate what winds would measure at standard height.

Precipitation measurement accuracy matters enormously for hydrology, agriculture, and severe weather monitoring. Rain gauges must be positioned away from obstructions, with the collector rim at least four times as far from any object as that object's height above the gauge. Wind causes significant undercatch errors, particularly for snow, as air flowing over the gauge rim creates updrafts that carry precipitation over rather than into the collector. Heated tipping bucket gauges at our stations minimize snow measurement errors while providing real-time precipitation rate data.

Barometric pressure readings require careful calibration and adjustment to sea level for meaningful comparison between locations at different elevations. Raw station pressure at 892 feet elevation might read 28.95 inches of mercury, while the same weather system produces 30.12 inches when adjusted to sea level. These adjusted values appear on weather maps and in forecasts. Falling pressure typically indicates approaching storms, while rising pressure suggests improving conditions. Rapid pressure changes of 0.06 inches per hour or more often accompany severe weather development.

All equipment undergoes annual calibration checks against reference standards traceable to the National Institute of Standards and Technology. Temperature sensors must read within 0.5°F of calibrated thermometers, humidity sensors within 3% relative humidity, and pressure sensors within 0.03 inches of mercury. Sensors failing these checks get replaced immediately. This maintenance schedule ensures our data meets the same accuracy standards required for official climate records. More information about our weather data collection network and forecast methodology is available on our main weather page.

Community Weather Awareness and Education

Beyond providing daily forecasts, Nelson Weather serves an educational mission to improve weather literacy throughout our community. Many weather-related deaths and injuries occur because people don't recognize dangerous conditions developing or don't know appropriate protective actions. We publish detailed explanations of weather phenomena, safety guidelines for various hazards, and seasonal preparedness information to help residents make informed decisions.

Severe weather awareness campaigns before spring storm season emphasize the differences between watches and warnings, explain how to interpret radar imagery, and review shelter locations and procedures. Statistics show that communities with higher weather awareness experience fewer casualties during tornado outbreaks and severe thunderstorm events. We partner with local schools, emergency management agencies, and community organizations to distribute safety information and conduct weather preparedness drills.

Winter weather preparedness education focuses on ice storm dangers, cold weather health risks, and travel safety during snow events. Many people underestimate how quickly hypothermia can develop in wet, windy conditions even when temperatures remain above freezing. Wind chill charts and guidance about appropriate clothing for various conditions help prevent cold-related injuries. We also provide information about protecting pipes, winterizing vehicles, and preparing emergency kits with supplies needed if power outages last several days.

Heat safety education becomes critical during summer months when heat-related illness sends hundreds of Americans to hospitals annually. Early season heat waves prove particularly dangerous because people haven't yet acclimatized to warm conditions. Our heat safety messaging emphasizes staying hydrated, recognizing heat exhaustion symptoms, checking on vulnerable neighbors, and never leaving children or pets in vehicles. Even with windows cracked, vehicle interior temperatures can reach 120°F within 30 minutes on an 80°F day.

Climate education helps community members understand the difference between weather and climate, interpret long-term trends, and prepare for changing conditions. Nelson's climate has warmed approximately 1.8°F since 1970 based on analysis of temperature records, consistent with broader regional and global trends documented by NASA climate data and NOAA research. This warming affects growing seasons, winter severity, and precipitation patterns in ways that matter for agriculture, water resources, and infrastructure planning. Understanding these long-term changes alongside day-to-day weather variability helps individuals and organizations make better long-term decisions. Additional details about climate trends and seasonal patterns appear throughout our weather information pages.