Jetstream Weather & Stargazing

Jetstream puts flower season, everyday weather, route weather and the night sky in one free app.

Flower season
- Cherry blossom, plum, autumn leaves and ginkgo on the map for Japan, South Korea, the US, Switzerland, Germany and Canada (Ontario)
- This year's observations, last year, and long-term averages to plan your trip, from each country's official sources

Everyday weather
- Current conditions and forecasts from official sources (CWA in Taiwan, JMA in Japan, NWS in the US), with MET Norway for the rest of the world
- Radar worldwide, plus satellite rainfall over the oceans where there is no radar
- Everyday index: what to wear, laundry, outdoors, driving, exercise, mosquitoes and more
- Air quality, UV, pollen and dust; official warnings, earthquakes and tsunamis (Taiwan, US and Europe)
- Sun and moon times, tides and sea state
- Home Screen and Lock Screen widgets that follow your location

Sky
- Horizon-mode star chart with Chinese asterisms alongside Western constellations
- Meteor showers, aurora probability, dark-sky sites and stargazing articles

Route weather (for pilots)
- Global wind, turbulence, cloud and icing layers, and a vertical route profile
- AI flight briefing: METAR/TAF, SIGMET, NOTAMs and enroute weather in one readable brief
- NOTAMs, FIR boundaries, oceanic tracks, HF/VHF assignments and GNSS interference
- Offline flight pack: download the layers for your whole route before you leave

Free
Jetstream is free, with no purchases or subscriptions. The AI flight briefing has a daily limit (3 a day signed in, 1 a day without an account); everything else is unlimited, and no account is needed.

Jetstream is a reference aid. It is not a source for flight decisions and does not replace official weather products or NOTAMs.

Terms of Use (EULA): https://jetstream.h-peak.com/terms
Privacy Policy: https://jetstream.h-peak.com/privacy