The scoreboard for weather that already happened.

Calculated from the current Kp and the state's geomagnetic latitude, the percentage says how likely the aurora is within reach of the northern horizon right now. It is a likelihood, not a promise; clear skies and darkness still decide what you see. How the scale works.

NOAA Space Weather Prediction Center provides the Kp readings, refreshed every 15 minutes.

The figure is the highest season snowfall total recorded by GHCN-Daily in any city we track in that state, not a statewide average. Because snowfall can differ sharply within a single state, an average would be meaningless for California, where the tracked station is Tahoe City.

Each tile shows the highest year-to-date rainfall recorded at any city we track in that state, not the statewide average. Averages mislead because rainfall varies widely within a border. The 1991-2020 normal for Hilo, Hawaii, is 120.39 inches, while Honolulu's is 16.41 inches. The figures come from GHCN-Daily station observations.

The figures on each tile, taken from NWS Local Storm Reports, are the hail-report totals for that state in the last 7 days. A week is used because hail is episodic, and a 24-hour window would leave most states at zero.