Tornado Risk Map Maker

Monthly tornado climatology from NOAA SPC reports, rendered as a broadcast graphic.

Data

Looking for tornado data…

The page downloads the newest SPC tornado database on its own and keeps a copy in this browser for 30 days. If SPC is down, load the CSV by hand or drop it on the page.

to

Month and risk tiers

Fine-tune (optional)

You can leave these alone. The defaults give the smooth TV look.

The numbers above are how often a tornado happened within 25 miles in that month (for example, 15% = 1 year in 7). Smoothing rounds off the edges; "drop small blobs" removes tiny specks.

Size

×

Look

Drag to pan, scroll to zoom, right-drag to rotate.

Text and labels

Places you add always show on the map. Pick the right match from the list after you search.

Export

© 2026 Live Storm Chasers Network
No tornado data yetThe SPC server didn't answer. Load the tornado CSV from the panel, or drop it anywhere on this page.
Building…
Drop the SPC tornado CSV