Synoptic - relating to the general weather pattern over a wide region, such as areas of high and low pressure or frontal boundaries, as opposed to mesoscale or smaller features such as a thunderstorm.

Weather occurring over a wide region on time scales exceeding 12 hours. You can either type in the word you are looking for in the box below or browse by letter. Search: Browse by letter:

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The spatial scale of the migratory high and low pressure systems of the lower troposphere, with wavelengths of 1000 to 2500 km.

612 FXUS66 KLOX 181247 AFDLOX Area Forecast Discussion...UPDATED National Weather Service Los Angeles/Oxnard CA 447 AM PST Wed Feb 18 2026 .SYNOPSIS...18/1207 AM. A stormy pattern …

(Synoptic Scale) Size scale referring generally to weather systems with horizontal dimensions of several hundred miles or more. Most high and low pressure areas seen on weather maps are synoptic-scale …

320 FXUS62 KRAH 180015 AFDRAH Area Forecast Discussion National Weather Service Raleigh NC 715 PM EST Tue Feb 17 2026 .WHAT HAS CHANGED... As of 300 PM Tuesday... * Nothing …

(Synoptic Scale) Size scale referring generally to weather systems with horizontal dimensions of several hundred miles or more. Most high and low pressure areas seen on weather maps are synoptic-scale …

3 days ago · Hazardous Weather Conditions Hazardous Weather Outlook Special Weather Statement Dense Fog Advisory until February 16, 10:00 AM EST Current conditions at Indianapolis …

391 FXUS66 KSGX 181757 AFDSGX Area Forecast Discussion National Weather Service San Diego CA 957 AM PST Wed Feb 18 2026 .SYNOPSIS... Showers will decrease today with areas of strong …