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Ilystics
Construction documentation for weather delays simplified
Ten years of NOAA station data turned into something construction contracts actually need: how many workdays weather and mud costs a jobsite, month by month, for 45 US metros. Free exhibits, no account. The full dataset is open under CC BY.
Construction contracts let you claim time for "abnormal" or "unusually severe" weather. None of them — AIA A201, the FAR, ConsensusDocs — define what that means. So contractors argue about rain with adjectives and usually lose. The data is out there, but buried and cumbersome for some to wrangle while under stress.
I built Ilystics to put a number on it: ten years of NOAA daily station observations run through a soil drying model, producing how many workdays a site actually loses. Not rain days — workdays, which is the unit contracts are written in.
The thing I didn't expect: in 26 of the 45 metros, the wettest month isn't the worst month. Boston averages 4.28" of rain in July and loses 8 workdays; January averages 3.69" — less rain — and loses 16. Double the loss on less rainfall.
The reason is the drying tail. Winter rain lands spread out on cold ground and each event starts its own multi-day clock before equipment can work. Summer storms cluster and their drying periods overlap. So a bid priced off rainfall totals systematically misprices winter earthwork.
What's free: baselines for all 45 metros, the per-year distribution behind every average, and a PDF exhibit for any US ZIP with no account. The whole dataset is CC BY 4.0 on Kaggle and HuggingFace — I'd rather people check the numbers than trust me.
Happy to answer anything about the model. The methodology is public because a number an opposing expert can't verify is worth nothing in a dispute.
About Ilystics on Product Hunt
“Construction documentation for weather delays simplified”
Ilystics was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #146 on the daily leaderboard. Ten years of NOAA station data turned into something construction contracts actually need: how many workdays weather and mud costs a jobsite, month by month, for 45 US metros. Free exhibits, no account. The full dataset is open under CC BY.
On the analytics side, Ilystics competes within Weather, SaaS and Construction — topics that collectively have 48.8k followers on Product Hunt. The dashboard above tracks how Ilystics performed against the three products that launched closest to it on the same day.
Who hunted Ilystics?
Ilystics was hunted by weather man. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of Ilystics including community comment highlights and product details, visit the product overview.
weather man