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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 ...
This is a list of meso-gamma mesoscale discussions, which are issued by the National Oceanic and Atmospheric Administration’s Storm Prediction Center during high-confidence and high-impact severe weather events.
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.
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)
The SPC itself doesn’t seem to acknowledge their existence; much less define which discussions fall into the meso-gamma category. The criteria for inclusion seems to be a criteria drummed up here. Hurricane Clyde 🌀 my talk page! 19:12, 11 October 2024 (UTC) [ reply ]
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 ...
This was predicted to produce a cold pool which would fuel the development of a multi-cell mesoscale convective system, as atmospheric instability in the northern Ohio Valley exceeded 5000j/kg. [ 5 ] At 5:38 p.m. CDT , the SPC issued Mesoscale Discussion #1148 over Northeastern Illinois, addressing the presence of updrafts fueling thunderstorms ...