Area Forecast Discussions are the real forecasts, written 3 to 4 times daily by NWS meteorologists reading the models and interpreting what they mean for your area. They offer far deeper insight than any weather app, but they're written in dense meteorological shorthand. Plaincast uses Anthropic's Claude to summarize them into plain English, side by side with the annotated original.
Plaincast decodes the National Weather Service's Area Forecast Discussion — the real forecast, written 3 to 4 times a day by the meteorologist on shift — into plain English. The discussion is where a forecaster explains their reasoning: which models disagree, what they are watching, and how confident they are. Below is the current edition for Milwaukee, with its shorthand expanded. The full experience — an AI plain-English summary beside the annotated original — loads with JavaScript, and every one of the 68 forecast offices has its own edition.
Crisp, fall-like conditions tonight. Some fog is possible after midnight.
Comfortable & pleasant afternoon weather conditions today through Tuesday & Thursday-Friday.
Windows for showers & thunderstorms Tuesday night through Wednesday & next weekend.
Synopsis/Mesoanalysis: Southern Wisconsin is centered between low pressure along the Ontario-Quebec border & high pressure along the Minnesota-Iowa border late this morning, resulting in breezy northwest surface winds. With the center of the high & affiliated low level subsidence well west of the area, surface heating is allowing for fair weather cumulus development, with cumulus coverage expected to increase further moving deeper into the afternoon. The aforementioned surface high will nudge into southern Wisconsin tonight, leading to clear skies and light surface winds. The clear skies & light winds will allow for efficient radiational cooling & fall-like low temperatures in the low 50s. Some spots could dip into the upper 40s. Areas of fog development are possible after midnight, particularly in low- lying locations. Fog will quickly dissipate after sunrise Monday, giving way to mostly sunny skies and pleasant weather conditions Monday afternoon. High pressure will begin to shift east of the region Monday night, allowing south-southwest winds to re-establish across the area.
Tonight: Will be monitoring for potential fog development near/after midnight as the boundary layer attempts to decouple in the presence of clear skies and light surface winds. Forecast soundings show extremely shallow near-surface moist layers susceptible to mix out and/or dew depletion, so fog coverage remains uncertain. Suspect that the best overall fog potential will remain confined to river valleys & other low-lying spots, but have included broader mentions areawide in the afternoon update. Will be monitoring visibility trends into the overnight. Slow down, use low beam headlights, and allow for extra following distance if encountering areas of fog on the roads.
This is the plain-text edition, decoded without AI so it loads anywhere. Read the whole Milwaukee discussion at /o/MKX/, see what changed since the last one, or open The National Desk for where the weather is today.