Water data that works for projects, permits and planning
Snoflo tracks 15,000+ USGS streamgauges alongside snowpack, reservoir storage and NWS flood stages — with the full observation record behind every page. Reconstruct conditions on a date that matters, export the record, or cite engineering statistics computed from the gauge's own history.
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The same questions come up on every project: what was the river doing then, what does it usually do, and what should we design for?
Construction forensics
Reconstruct discharge, gage height and water temperature for the exact dates you’re investigating — as a clean document with source attribution and a generation timestamp.
Civil & hydrologic design
Exceedance percentiles and observed peak-flow context computed from each gauge's full record, plus published NWS flood stages, right on the gauge page.
In-water work windows
Live conditions, 10-day observed trend and PULSE 15-day forecasts help crews schedule crossings, dewatering and low-flow work with confidence.
Land planning & permitting
Watershed context, seasonal normals and year-over-year history for the site you're entitling — before the consultant study kicks off.
The toolkit
Historical conditions reports
Pick a gauge and a date range, get a print-ready conditions report — daily values, summary statistics, flood stages, USGS attribution and a generation timestamp. Save as PDF from your browser.
CSV data export
Download the complete daily record for any gauge — discharge, gage height, water temperature — straight from the gauge page into your spreadsheet or model.
Engineering statistics
Flow-duration exceedance percentiles (P10–P90), observed annual peaks and return-period estimates from the gauge's record, plus published flood stages.
Live conditions & forecasts
Current discharge and stage refreshed through the day, NWS alerts, and PULSE probabilistic 15-day outlooks trained per-gauge.
Data provenance: USGS NWIS observations as archived by Snoflo; NOAA/NWS flood stages where published. Statistics are computed from observed records and clearly labeled as such — general reference context, not professional engineering analysis. Always verify against official USGS NWIS records.
Put the record to work
Premium unlocks reports and exports on every gauge, snow station and reservoir we track.
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