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A tornadic debris signature ( TDS ), often colloquially referred to as a debris ball, [1] is an area of high reflectivity on weather radar caused by debris lofting into the air, usually associated with a tornado. [1] [2] A TDS may also be indicated by dual-polarization radar products, designated as a polarimetric tornado debris signature ( PTDS ).
Tornado debris signature (TDS) – A more formal term for a debris ball. Tornado emergency – Enhanced wording used by the U.S. National Weather Service in a tornado warning or severe weather statement when a large, intense tornado is expected to impact a highly populated area (traverse a large city or dense suburbs).
Significant weather advisory (SPS; alt.: significant weather alert) – A strong thunderstorm below severe criteria, containing small hail below 1 inch (2.5 cm) diameter, and/or strong winds of 39–57 miles per hour (63–92 km/h), is indicated by Doppler weather radar and may create some adverse impacts on travel.
The Fed raised the fed funds rate 11 times between March 2022 and July 2023, bringing it to a target range of 5.25% to 5.5%. But if the Fed cuts rates at one of its meetings later in the year , it ...
A tornadic vortex signature, abbreviated TVS, is a Pulse-Doppler radar weather radar detected rotation algorithm that indicates the likely presence of a strong mesocyclone that is in some stage of tornadogenesis. [1] It may give meteorologists the ability to pinpoint and track the location of tornadic rotation within a larger storm, and is one ...
AWIPS is a complex network of systems that ingests and integrates meteorological, hydrological, satellite, and radar data, and also processes and distributes the data to 135 Weather Forecast Offices (WFOs) and River Forecast Centers (RFCs) nationwide. Weather forecasters utilize the capabilities of AWIPS to make increasingly accurate weather ...
The European Centre for Medium-Range Weather Forecasts ( ECMWF) is an independent intergovernmental organisation supported by most of the nations of Europe. It is based at three sites: Shinfield Park, Reading, United Kingdom; Bologna, Italy; and Bonn, Germany. It operates one of the largest supercomputer complexes in Europe and the world's ...
Special Weather Statements are issued by regional offices of the Meteorological Service of Canada for weather events that are unusual or those that cause general inconvenience or public concern and cannot adequately be described in a weather forecast. These may include widespread events such as Arctic outflows, Alberta clippers, coastal fog ...
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