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The portal was founded by Ivo Lukačovič in November 2014, [1] [2] initially focusing on wind animation. It has since expanded to include various essential meteorological parameters, such as temperature , pressure , relative humidity , cloud base, and additional panels featuring more advanced data.
Map of regions covered by the 122 Weather Forecast Offices. The National Weather Service operates 122 weather forecast offices. [1] [2] Each weather forecast office (WFO or NWSFO) has a geographic area of responsibility, also known as a county warning area, for issuing local public, marine, aviation, fire, and hydrology forecasts.
A wind speed of 15 mph and temperature of 15 degrees can make it feel like zero degrees, for instance. Wind chill values near minus 19 degrees mean frostbite is possible within 30 minutes.
Such maps have been in use since the mid-19th century and are used for research and weather forecasting purposes. Maps using isotherms show temperature gradients, [2] which can help locate weather fronts. Isotach maps, analyzing lines of equal wind speed, [3] on a constant pressure surface of 300 or 250 hPa show where the jet stream is located.
In Canada, a severe thunderstorm is defined as having wind gusts of greater than 90 km/h (56 mph), hail with a diameter of greater than two centimetres (0.79 in), rainfall rates of greater than 50 millimetres (2.0 in) in one hour or greater than 75 millimetres (3.0 in) in three hours, or tornadoes. [14]
Get the Boydton, VA local weather forecast by the hour and the next 10 days.
A surface weather analysis for the United States on October 21, 2006. By that time, Tropical Storm Paul was active (Paul later became a hurricane). Surface weather analysis is a special type of weather map that provides a view of weather elements over a geographical area at a specified time based on information from ground-based weather stations.
The weather service forecasts a chance of rain and snow showers between 1 and 3 p.m. in Milwaukee, switching to scattered snow showers later in the afternoon and evening. Precipitation chances ...