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A mesoscale discussion may refer to: Mesoscale convective discussion , a forecast concerning thunderstorms issued by the Storm Prediction Center (SPC) Mesoscale precipitation discussion , a forecast concerning precipitation issued by the Weather Prediction Center (WPC)
SPC mesoscale discussions (MDs) once covered convection (mesoscale convective discussions [MCDs]) and precipitation (mesoscale precipitation discussions [MPDs]); MPDs are now issued by the Weather Prediction Center (WPC). MCDs generally precede the issuance of a tornado or severe thunderstorm watch, by one to three hours when possible. [34]
It issues mesoscale precipitation discussions (MPDs) as flash flood guidance for NWS forecast offices (NWSFOs), NWS River Forecast Centers (RFCs), the media, emergency managers, and other users. MPDs contain technical discussions concerning heavy rainfall events and expected impacts on flash flooding.
Convective mesoscale discussions are issued by the National Oceanic and Atmospheric Administration’s Storm Prediction Center based on the National Weather Center in Norman, Oklahoma. [ 1 ] [ 2 ] One type of mesoscale discussion is a meso-gamma mesoscale discussion , which are for tornadoes believed to be at least EF2 on the Enhanced Fujita ...
English: A mesoscale precipitation discussion issued by the Weather Prediction Center concerning flooding on September 1, 2023 in the southwestern United States.
Mesoscale meteorology is the study of weather systems and processes at horizontal scales of approximately 5 kilometres (3 mi) to several hundred kilometres. It is smaller than synoptic-scale systems (1,000 km or larger) but larger than microscale (less than 1 km).
A mesoscale precipitation discussion concerning flooding across portions of the Northeastern United States issued by the Weather Prediction Center on September 11, 2023.
The Storm Prediction Center (SPC) issues Day 1, Day 2, and Day 3 Convective Outlooks depicting forecast areas of general (non-severe) and severe thunderstorm threats across the contiguous United States, along with a text narrative discussion consisting of a plain-language summary of the threat type(s) and timing focused on areas of highest risk ...