StormNet vs Whumpf

StormNet is optimized to provide the most accurate severe weather forecast with NEXRAD, Super-Res Radar. StormNet is completely free, with no ads. Trained on decades of severe weather events, StormNet analyzes high-resolution radar, satellites, ground-based sensors, and weather forecast models in real-time to find complex patterns that lead to severe weather. The model updates every 2 minutes to provide 14-day forecasts for lightning, hail, damaging thunderstorm winds, and tornadoes. Super-Res Radar is the highest-resolution NEXRAD radar data available from 159 stations across the continental United States. Each radar station updates every 3-4 minutes and measures the intensity of precipitation based on how much energy the radar signal receives back from objects in the atmosphere. Combined, StormNet + Super-Res Radar provides a first-of-its-kind, multiple-component severe weather forecast system for the United States. StormNet Map Overlays • Radar: The highest-resolution radar available for the United States from each radar station. • Radar + Risk: NEXRAD radar, alongside StormNet risk probabilities, for the next 4 hours. • Risk Forecast: The StormNet risk probabilities from real-time to 14 days into the future. StormNet Risk Forecasts • Lightning • Hail • Damaging Winds • Tornado Super-Res (NEXRAD) Radar • Radar Reflectivity • Radar Velocity • Spectrum Width National Weather Service Warnings • Tornado • Severe Thunderstorm • Snow Squall • Flash Flood StormNet vs. National Weather Service The National Weather Service, the Storm Prediction Center, and other government agencies are the official sources for watches, warnings, and severe weather information. StormNet should serve as a trusted and automated guide for severe weather risk, but StormNet should not be treated as an official source. StormNet vs. Traditional Weather Models Existing weather forecast models are incredible feats of engineering and predict the ingredients for severe weather, but they are not designed to excel at severe weather forecasting and are not real-time tools. StormNet was trained and optimized to provide severe weather forecasts. StormNet vs. Other Weather Apps Existing weather apps and companies usually pass along official government watches and warnings, and often communicate if lightning or hail is already close by. While these are valuable features, we are not aware of another weather app or company that matches StormNet’s ability to provide real-time updates for lightning, hail, damaging thunderstorm winds, and tornado risk. Powered by OpenSnow In 2011, OpenSnow began predicting snowfall for skiers and snowboarders. OpenSnow has since become a global leader in mountain weather forecasts and expanded to provide forecasts for every type of outdoor activity. Since lightning is a risk to outdoor activities, especially on longer mountain-based adventures, OpenSnow created a weather forecast system that would provide both lightning forecasts to support real-time decisions and multi-day outlooks to support trip planning. Meteorologist Andrew Brady built StormNet to predict the risk of severe weather. OpenSnow acquired his technology in 2024 to help people stay safe and enjoy the outdoors. — Terms & Conditions — StormNet is free and available in the United States. We'll never track you, sell ads, or collect data. We only ask for your location to show the most accurate radar and severe weather forecast. Full terms and conditions can be found here: https://support.opensnow.com/legal/terms | https://support.opensnow.com/legal/privacy

Whumpf puts the avalanche forecast for every zone you care about on one screen, side by side, with the weather to check it against. When you've picked where to go, Heading Out leaves a trip plan with the people at home and reminds them if you don't check in. COMPARE ZONES ACROSS CENTERS - Pick zones from any Alaska avalanche center and see the danger at all three elevation bands next to each other. From Anchorage that means Hatcher Pass, Turnagain and Valdez at a glance. - Avalanche problems with their likelihood, size, and the aspects and elevations they're on, plus the forecaster's bottom line. - Nearby weather stations and SNOTEL sites: temperature, wind and gusts, new snow and water content over 24 or 72 hours, next to the NWS point forecast. - Recent field observations from the center for each zone. - Page back through the last few days to see how the picture changed. THE FORECAST, EVERY MORNING - Each morning you get a notification for each of your saved zones with the danger at all three elevation bands and a line of station weather. - The full forecast downloads with the notification, even if the app was closed, so it's already on your phone when you lose service at the trailhead. - Your saved zones are stored on your phone and refreshed in the background. HEADING OUT: LEAVE A TRIP PLAN Before you go, Whumpf builds the trip plan a search and rescue team asks for: where you parked, with a map pin; your route and backup plans; who's in the party; what you're wearing and carrying; your vehicle; your satellite messenger's share page; and medical details. - Fill in your profile once and every plan after that is prefilled. Pick the area, set your times, choose your contacts, send. - Your contacts get a link to a page that opens on any phone, no app needed, with everything in the order a rescuer will ask for it and who to call. - Set a back-by time and a worry-by time. If you haven't checked in by then, Whumpf emails your contacts and calls them with an automated message. - Running late? A contact can push the worry-by time back from the page. Whoever hears from you, or calls for help, marks it there and the other contacts see it. - Optional: share your live location with those contacts for that trip only. It stops when you check in, and the trail is deleted with the plan. - Check in with one tap when you're back. FILE AN OBSERVATION Write up what you saw in the field, with photos and the location, and send it to your avalanche center through the center's own form, filled in with what you wrote where the form allows. Or email it with a PDF copy and your photos, or just keep the PDF. No account, no sign-in, free. Forecast data comes from the National Avalanche Center and its member centers. Always read the full forecast from your local avalanche center before making travel decisions. Whumpf does not replace the source forecast. It never contacts rescuers itself: your contacts decide when to call, and their page tells them how. Whumpf is the sound a collapsing weak layer makes underfoot: one of the clearest signs the snowpack is unstable.