What is an Area Forecast Discussion (AFD)?

An Area Forecast Discussion is a detailed narrative forecast written 3-4 times daily by National Weather Service meteorologists. Unlike weather apps that show icons and numbers, AFDs explain the reasoning behind the forecast - why models disagree, what forecasters are watching, and where uncertainty exists.

How does Plaincast translate NWS forecasts?

Plaincast uses Anthropic's Claude AI to summarize each forecast section into natural, readable prose. It also annotates the original text with a 230+ term jargon glossary, converts Zulu (UTC) times to local time zones, and highlights key information for quick scanning.

Which NWS offices does Plaincast support?

Plaincast supports 68 NWS forecast offices across all US regions including Los Angeles (LOX), New York (OKX), Chicago (LOT), Houston (HGX), Phoenix (PSR), San Francisco (MTR), Miami (MFL), Seattle (SEW), Denver (BOU), and many more.

Yes, Plaincast is completely free and open source. It uses the NWS public API for forecast data and Anthropic's Claude for AI summaries. No account or API key required.

How often are forecasts updated?

NWS meteorologists issue new Area Forecast Discussions 3-4 times per day, typically around 4 AM, 10 AM, 4 PM, and 10 PM local time. Plaincast automatically fetches the latest discussion when you load the page.

Milwaukee NWS Forecast in Plain English

What is an Area Forecast Discussion?

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.

Area Forecast Discussion · National Weather Service Milwaukee (MKX) · issued Monday, July 27 at 3:21 PM CDT.

Revised in 10 passages since the 12:25 AM discussion. See every revision.

Messages

Strong to severe thunderstorms ending late this afternoon over far se WI.

Extreme Heat Warning in effect for south central Wisconsin into early evening.

High swim risk conditions are expected to develop early Tuesday morning and continue into Wednesday morning along all Lake Michigan beaches due to high waves and currents expected. A Beach Hazard Statement has been issued for all Lake Michigan counties.

Short Term

Much of the strong to severe convection will exit se WI late this afternoon. Otherwise, low pressure around 1000 mb over central WI will track sewd to the Lower Great Lakes by 09-12Z Tue. Its cold front will pass late this afternoon and evening but with only slight chances for showers and storms due to the lack of upper dynamics and warm air aloft. The low and its upper wave will then slow and occlude over the Mid Atlantic States to New England through Thursday. Nly winds will cool high temperatures to lower to middle 80s for Tue including much lower relative humidity. A ridge of high pressure will then prevail Tue nt-Thu AM with pleasant summer wx and high temperatures rising each day in the 90s.

Long Term

Nwly flow aloft will prevail during this period with embedded shortwave troughs. Shower and storm chances will rise to 50-60 percent for Fri-Sat. High temperatures in the 80s are expected each day.

This is the plain-text edition, decoded without AI so it loads anywhere. The full Plaincast experience — plain-English summaries beside the annotated original, with the forecast changelog — loads automatically with JavaScript, or open the interactive edition.