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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.
National Weather Service Weather Forecast Office Northern Indiana; The Northern Indiana NWS office's county warning area, bordered in dark red. A total of 37 counties (24 in Indiana, 8 in Ohio, and 5 in Michigan) receive weather information, forecasts, watches, and warnings from the Northern Indiana office: Agency overview; Type: Meteorological
A weather map, also known as synoptic weather chart, displays various meteorological features across a particular area at a particular point in time and has various symbols which all have specific meanings. [1] Such maps have been in use since the mid-19th century and are used for research and weather forecasting purposes.
To view what counties are under what travel advisories, you can view the map on the Department of Homeland Security's website in.gov/dhs/traveladvisory. Indianapolis school closings, delays 1/23/24
Since the NWS discontinued the separate significant weather advisory product in July 2021, Special Weather Statements have been used most commonly to alert of sub-severe thunderstorms (containing sustained winds or gusts of 40–57 mph (64–92 km/h) and/or hail less than one inch (2.5 cm) in diameter, in addition to frequent to continuous ...
An example of weather alerts on a national map from the National Weather Service. The NWS divides severe weather alerts into several types of hazardous/hydrologic events: Severe local storms – Short-fused, small-scale hazardous weather or hydrologic events produced by thunderstorms (including large hail, damaging winds, tornadoes, and flash ...
The first Weather Bureau radiosonde was launched in Massachusetts in 1937, which prompted a switch from routine aircraft observation to radiosondes within two years. The Bureau prohibited the word "tornado" from being used in any of its weather products out of concern for inciting panic (a move contradicted in its intentions by the high death tolls in past tornado outbreaks due to the lack of ...
PDS Special marine warnings are issued by the National Weather Service to inform mariners of weather conditions that present a considerable threat to life and property. On April 19, 2018, the Baltimore / Washington, D.C. forecast office upgraded a special marine warning to PDS status as a gust front approached Chesapeake Bay .