Data health

Storm Mode / Retained evidence

SIMON

Change time or forecast product

Replay uses retained source bytes. Recording begins with activation; missing history is not clear weather.

Live sources keep independent clocks.

Replay coverage and interpretation

Rolling target: 24 hours; cells: six hours. Radar: NOAA MRMS national overview, 8-minute tolerance. Satellite: original GOES GeoColor day/night picture, hourly sampling, 75-minute tolerance. No interpolation or latest-image fallback. Warning and source checks retain their own clocks. “Recorded by” is collector acquisition evidence, not exact browser publication history.

Current GLM density, velocity and specialist layers are hidden during replay. Snow uses retained footprint metadata with unverified pixel time. Forecast uses one pinned issuance/run and exact valid time.

No observed replay frame displayed.

Open the complete replay reader (works without scripting or WebGL)

REPLAY · 2026-10-17T19:27:57.037Z

Known-by uses retained collector checkpoints. Valid-at can include late captured warning messages and imagery with earlier source times. Neither reconstructs exact browser publication history.

Official NHC coastal segments/cone intersect named U.S. coverage. This monitoring area comes from the selected live workspace; it is not a reconstruction of the earlier cyclone’s impact extent.

No retained radar at or before this cursor within its 8-minute tolerance. No present-day image is substituted.

Historical weather is not current protective-action guidance.

Return to the live workspace

Alerts at replay cursor

Warning coverage is incomplete or unconfirmed · 2026-10-17 19:27:57.037Z. Historical evidence, not current protective-action guidance.

Replay details

Choose a retained alert. Camera and cursor stay fixed while inspecting it.

Retained radar-local cells (0)

No retained cell frame within ten minutes; the cell archive targets six hours.

    Retained stations (0) and gauges (0)

    Individual report times at or before the cursor. Stations: 90-minute tolerance; rivers: three-hour tolerance. Forecast hydrographs are separate products. Unavailable recordings are not zero weather.

      Snow depth at cursor

      Footprint metadata valid 2026-10-17 12:00:00 UTC; captured 2026-10-17 18:08:03.908Z. Pixel analysis time is unverified. Original retained picture, legend and provenance

      Snow water equivalent at cursor

      Footprint metadata valid 2026-10-17 12:00:00 UTC; captured 2026-10-17 17:08:04.475Z. Pixel analysis time is unverified. Original retained picture, legend and provenance

      GLM density, velocity and specialty live layers are not retained by this replay archive and are hidden. Use Live for their current source-qualified views.

      Source checks at the cursor