OpenSnow vs Heliocast

OpenSnow is your trusted source for the most accurate snow forecast, snow report, and ski conditions. "Weather forecasting for the mountains takes extra focus, analysis, and precision, which is exactly what OpenSnow provides. The app is incredible, even for super weather nerds like myself." – Cody Townsend, Pro Skier 15-Day Snow Forecasts Finding the location that has the best snow conditions can feel overwhelming. With OpenSnow, deciding where to go is easy. View the latest 15-day snow forecast, snow report, conditions history, and mountain webcams for your favorite locations in just a few seconds. Local Daily Snow Experts Instead of spending hours sifting through weather data, get the inside scoop in just a few minutes. Our local experts write a new Daily Snow forecast each day in the winter for regions around the US, Canada, Europe, Japan, Australia, and New Zealand. Have one of our expert local forecasters guide you to the best snow conditions. 3D Weather + Snow Maps We make it easy to track incoming storms with super-res radar and global precipitation, radar, and snow forecast maps. You can also view 3D maps for snow depth, avalanche risk, slope angle, active fires, air quality, wildfire smoke, public and private land ownership, and more. Download high-resolution satellite maps to view offline. PEAKS + StormNet PEAKS is our state-of-the-art weather forecast model optimized for complex, mountain terrain. StormNet is our severe weather forecast model that produces real-time, high-resolution forecasts for lightning, hail, damaging winds, and tornadoes. Combined, PEAKS + StormNet provide a first-of-its-kind, fully operational multi-component weather forecast system. Daily Features • 15-Day Hourly Forecasts • Current + Forecast Radar • Precipitation Forecast Maps • Air Quality Forecasts • Wildfire Smoke Forecast Maps • 50,000+ Weather Stations • 3D + Offline Maps • Land Boundary + Private Ownership Maps • Recent Satellite Maps Snow + Ski Features • 15-Day Snow Forecast • Powder Quality Forecast • Snow Depth Map • Season Snowfall Map • Snow Forecast Alerts • Snow Forecast Maps • Offline Ski Resort Trail Maps • Snow Forecast + Report Widgets • Historical Snow Reports Severe Weather Features (US only) • Super-Res Radar • Lightning Risk • Tornado Risk • Hail Risk • Damaging Winds Risk • Severe Weather Alerts Free Features • My Location 15-Day Forecast • Snow Forecast 15-Day Summary • Historical Weather + Snow Reports • Snow Report Alerts • Avalanche Forecasts • Mountain Webcams • Active Fires Map • Air Quality Map • Slope Angle + Slope Aspect — Free Trial — New accounts automatically receive the full OpenSnow Premium experience, with no credit card or payment information required. If you choose not to purchase OpenSnow after the free trial is over, you will be automatically downgraded to a free account and not charged. — In-App Purchase — OpenSnow Base is an auto-renewable subscription, which will renew yearly at $49.99 USD. Payment will be charged to the user's Apple account at confirmation of purchase. The subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period. The account will be charged for renewal within 24 hours prior to the end of the current period and identify the cost of the renewal. If the auto-renewal fails due to a payment issue, you will still be able to access the paid content for 16 days while Apple attempts to collect payment. Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase. Full terms and conditions can be found here: https://support.opensnow.com/legal/terms | https://support.opensnow.com/legal/privacy Sales through Apple will be governed by Apple’s refund policy. We value all of our customers and encourage you to provide feedback on your experience. Please get in touch with us by sending an email to hello@opensnow.com

Will you see the aurora tonight? Heliocast answers the moment you open it, in a sentence, for exactly where you are standing. Most aurora apps hand you a Kp number and leave the hard part to you. But a Kp 6 is worth nothing under cloud, worth nothing under a full moon, and worth nothing at 9pm in June. Heliocast checks all four at once - geomagnetic activity, darkness, moonlight and your local cloud - and gives you one verdict with the reason attached. When the answer is no, it names which of the four is stopping you. TONIGHT, ANSWERED - A plain-language verdict and a 0-100 visibility score for your coordinates - Tonight's astronomical dark window, and how long it lasts - Moon phase, cloud cover by layer, live Kp and Bz - Where the auroral oval is sitting right now WHICH NIGHT TO GO - Every night ahead ranked on darkness, moon, cloud and the NOAA forecast - An hour-by-hour grid, 6pm to 6am, for the next three nights - Save the place you are travelling to and plan against its sky, not yours ALERTS THAT KNOW YOUR SKY - Our server watches NOAA's 1-minute feed all night and wakes your phone the moment your threshold is crossed, with the app closed - Cloud-aware and dark-aware by default, so a storm you could never have seen does not ring at 3am - Thresholds on Kp, and with Pro on Bz, solar wind speed and visibility A 3D AURORA MAP - Spin a live globe carrying the OVATION auroral oval and the day/night line - Six Arctic observatories and their all-sky cameras, one tap away: Yellowknife, Churchill, Fairbanks, Sodankyla, Tromso and Kiruna THE SUN, IN FULL - NASA SDO in eight wavelengths, plus white-light continuum and magnetogram - Active regions plotted at their real heliographic positions - SOHO/LASCO C2 and C3 coronagraphs, and GOES CCOR-1 - L1 solar wind speed, density and the full interplanetary magnetic field - GOES X-ray and proton flux with flare classes, for anyone watching HF propagation and radio blackouts WHAT IS HEADING THIS WAY - Earth-directed CMEs with predicted arrival times and expected Kp - Flare history, live NOAA watches and warnings, and the R, S and G scales Plus a sightings journal that files the conditions alongside your photo, so you learn what actually works, and a Learn section that explains every number in the app. WIDGETS Tonight's verdict on your home screen and your lock screen. EIGHT AUTHORITATIVE FEEDS NOAA SWPC, NASA SDO, NASA DONKI, SOHO/LASCO, GOES, DSCOVR, Kyoto WDC and USGS, and MET Norway for cloud. Everything is fetched and cached on our own server, so the app stays fast and the agencies never see anything about you. FREE, AND HONEST ABOUT IT No account. No ads. No sign-up wall. The free tier is a real app: tonight's verdict, the full 3D map, live Kp, the Sun and solar wind, the observatories, the journal, and one overnight alert. HELIOCAST PRO $4.99 a year. Not a month. That is about 42 cents a month, and less than most aurora apps charge for four weeks. - The full 14-night ranking, not just three - Up to 10 saved places, home and the trip - Unlimited alerts on Bz, wind speed and visibility, plus quiet hours - A weather-radar layer on the globe - Your full sightings archive, kept with its conditions Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula