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Showers and Thunderstorms Possible Late Monday into Tuesday
Plaincast — the National Weather Service forecast, decoded into plain English
Plaincast
What the forecast actually says — NWS Area Forecast Discussions, decoded into plain English.
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 Grand Rapids, 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.
Discussion
Surface high pressure moves east on Saturday and return flow brings some moisture. There could be a few showers on Saturday and Saturday night. There is enough ensemble support to bump up the blend-of-models forecast chance of rain from around zero to slight/low chance across the northern zones where the better moisture and lift is located.
Showers and Thunderstorms Possible Late Monday into Tuesday
A shortwave trough ejects out of the northern Rockies with a surface low tracking into Canada early next week. A trailing cold front is expected to touch off showers and thunderstorms Monday night and Tuesday. Instability and deeper moisture is across northern Lower Michigan pooling ahead of the cold front, which sinks south through the forecast area on Tuesday. Precipitable water surges close 2 inches, so heavy rain potential is there as the front will be moving slowly and MBE vectors are less than 10 knots.
The front stalls across the southern zones on Wednesday, with a rainy stretch of weather possible through Thursday as a surface low tracks along the front across southern Lower Michigan.
This is the plain-text edition, decoded without AI so it loads anywhere. Read the whole Grand Rapids discussion at /o/GRR/, see what changed since the last one, or open The National Desk for where the weather is today.
Data from the National Weather Service. Translated by Claude. About · For developers & agents · Subscribe: RSS feed for this office · Source on GitHub