For iPhone

See lightning coming.
Get the all-clear when it's gone.

Live satellite lightning on a map, plus alerts for the places you care about — home, the ballfield, the job site.

Coming soon to the App Store

How it works
A dark dot-grid map with a pin, a pulsing distance ring, and lightning flashes inside and outside the ring.

Live map

Lightning from GOES, shown live.

Lightning detected by NOAA's GOES satellites — the Geostationary Lightning Mapper — is shown live on a map, including cloud flashes that ground sensors can miss.

App screenshot coming soon
App screenshot coming soon

Alerts

Strike alerts for saved sites.

Save your sites and pick a radius, for example 10 miles. When lightning comes inside the ring, the site goes to Watch with a 30-minute countdown that restarts with each new strike in range.

  1. Quiet

    No lightning inside the ring.

  2. Watch

    30 minutes

    The countdown is running. Each new strike in range starts it over.

  3. All clear

    The ring has been quiet long enough to stand down.

All clear

A notice when the ring stays quiet.

When the ring has been quiet for 30 minutes, you get an all-clear, so you know when it's reasonable to head back out.

A calm distance ring with a check mark, showing the all-clear.

Coverage

All 50 states.

Every U.S. state, Alaska and Hawaii included, plus a buffer beyond the borders and coastlines. Storms rolling in from offshore or across the border still show up.

A large 50 over an abstract dot field, with a soft outer ring and lightning near the edge. 50

Notifications

Push first. Text only if you opt in.

Alerts arrive as push notifications by default. Text-message alerts are optional and opt-in only.

An unchecked consent box, then you confirm your number. Reply STOP anytime. Msg & data rates may apply.

SMS Terms

  • Default

    Push

    On from the start. Alerts come as notifications.

  • Opt in

    Text messages

    Consent starts unchecked.

A note on safety

Nephoscope helps situational awareness. It does not replace official warnings or your judgment.

When thunder roars, go indoors.

Coming soon to the App Store.

Questions? Find Support in the footer.