When severe weather threatens your community, your website needs to do more than show tomorrow’s forecast. Your visitors need real-time severe weather alerts — active warnings, live storm tracks, and tornado detection — the moment conditions turn dangerous.
This guide walks through exactly how to set up severe weather alerts on your website using ZoomRadar, an affordable, embeddable weather radar built for websites and digital displays, including the NOAA data behind the alerts and which features cover which type of severe weather.
What Counts as a Severe Weather Alert
Severe weather alerts go beyond a forecast. They cover:
- Active warnings and watches — official National Weather Service alerts for your coverage area
- Real-time tornado detection — automated detection of tornadic conditions using radar-derived signatures
- Live storm tracks — the current path and estimated time of arrival for tracked storm cells
- Winter storm and hurricane overlays — seasonal severe weather layers for snow, ice, and tropical systems
A forecast widget can tell your audience a storm might be coming this week. Severe weather alerts tell them a storm is here, where it’s headed, and how much time they have.
How to Set Up Severe Weather Alerts on Your Website
ZoomRadar builds severe weather alerts directly into its radar map, so setup takes a few steps rather than a development project.
Step 1 — Choose a plan. Real-time tornado detection and the full severe weather overlay set are available on ZoomRadar’s $60/month Map plan. The $12/month Sidebar Widget covers rapid-update radar without the tornado detection layer.
Step 2 — Subscribe and set your coverage area. After subscribing, configure your coverage area — the county, city, or region you need alerts for — directly in ZoomRadar’s self sign-up portal.
Step 3 — Enable severe weather overlays. In the same portal, turn on the overlays you want active: warnings and watches, tornado detection, storm tracks, or seasonal layers like winter storm and hurricane tracking.
Step 4 — Embed your map. The portal generates a custom iframe embed code. Paste it into your website’s HTML editor, and live severe weather alerts appear on your page — no developer required.
Where the Alert Data Comes From
ZoomRadar’s severe weather alerts run on NOAA NEXRAD data — the same Level 2 Doppler radar source professional broadcast meteorologists use. Local NOAA radar stations update every 4–5 minutes, and ZoomRadar pulls each update as soon as it’s available, so the map you embed reflects conditions in near real time rather than a delayed snapshot.
The National Weather Service issues official warnings and watches, and ZoomRadar displays them directly on your radar map the moment they go active, alongside the live storm tracks ZoomRadar derives from the same radar feed. Each storm track shows the current path and an estimated time of arrival for the areas in its way, giving your audience a practical answer to “how much time do I have” rather than just a colored polygon on a map.
Tornado detection works differently from the standard warning overlay. ZoomRadar’s detection model evaluates radar data for tornadic signatures — vortex and debris patterns — and currently identifies over 90% of verified EF2 and stronger tornadoes. To reduce false positives while the model matures, ZoomRadar currently displays detections within National Weather Service tornado warning polygons rather than as standalone alerts. When a detection appears, hovering over it reveals the underlying radar imagery — Tornado Vortex Signature and Tornado Debris Signature snapshots — so your audience can see the radar evidence behind the alert, not just a generic icon.
A Tornado Season Example: Setting Up Alerts for a Local News Site
Here’s how the setup looks in practice for a local news site preparing for tornado season.
The site’s editor subscribes to ZoomRadar’s $60/month Map plan, since tornadoes are a regional risk and the team wants real-time detection active before storm season starts. They send ZoomRadar the station’s domain, the specific page the map will live on, and their broadcast coverage area — three counties centered on their market.
They ask ZoomRadar to enable every relevant overlay: warnings and watches, live storm tracks, and tornado detection. ZoomRadar configures the map to their coverage area, sends back an iframe embed code, and adds the station’s logo to the map for branding.
The news team pastes the code into their weather page. From that point forward, whenever a tornado watch or warning covers their three-county area, it appears automatically on their site — no one on staff has to manually update anything when severe weather develops. When a tornado forms, ZoomRadar’s detection layer flags it directly on the map, and the storm track shows viewers when the storm is likely to reach their town.
Setting Up Alerts for Emergency Services
Emergency management organizations, 911 centers, and fire departments use the same setup above, with a few additional considerations. A 911 dispatch center, for example, typically configures its coverage area to match its jurisdiction exactly rather than a broader regional view, so alerts stay relevant to the calls dispatchers are actually fielding. A fire department covering a wildfire-prone region might prioritize the storm track overlay to anticipate lightning-driven ignition risk, while a coastal emergency management office leans on the hurricane season overlay well before landfall.
Across all of these use cases, the setup steps stay the same: choose a plan based on which overlays you need, share your exact coverage area, enable the relevant severe weather layers, and embed the resulting map. ZoomRadar’s branding options also let emergency services display their own logo alongside the alerts, keeping the map recognizable as an official department resource rather than a generic third-party tool — an important detail when the public needs to trust the source of the information during an active event.
ZoomRadar’s Severe Weather Feature Breakdown
| Feature | What It Shows | Plan |
|---|---|---|
| Warnings & watches | Official NWS alerts for your coverage area | $30/month (1 of 2 selectable) or $60/month (all included) |
| Live storm tracks | Storm path and estimated time of arrival | $30/month (1 of 2 selectable) or $60/month (all included) |
| Real-time tornado detection | Automated tornadic signature detection (90%+ accuracy on EF2+) | $60/month |
The $30/month and $60/month plans cover most website use cases, but they’re not ZoomRadar’s only options. Digital signage plans — for screens in courthouses, hospitals, or shopping malls rather than websites — carry custom pricing and the same overlay eligibility as their equivalent website-plan tier. Radio groups and community news networks running multiple maps or locations can also get custom bulk pricing. Reach out to ZoomRadar directly for a quote on either.
Frequently Asked Questions
How do I set up alerts for severe weather and tornadoes?
Subscribe to a ZoomRadar plan, share your coverage area, and tell ZoomRadar which overlays to enable — warnings and watches, tornado detection, and storm tracks. ZoomRadar configures your map and sends a ready-to-use iframe embed code. Real-time tornado detection requires the $60/month Map plan.
Does ZoomRadar issue its own severe weather warnings?
No. ZoomRadar displays the official warnings and watches that the National Weather Service issues, along with its own tornado detection layer, which ZoomRadar builds from radar data. ZoomRadar doesn’t generate independent warnings outside the NWS system.
Can I set up severe weather alerts without a developer?
Yes. After ZoomRadar sends your embed code, you paste it into your website’s HTML editor — no coding, API integration, or server configuration required.
How accurate is ZoomRadar’s tornado detection?
ZoomRadar’s tornado detection currently identifies over 90% of verified EF2 and stronger tornadoes. ZoomRadar treats the model as an ongoing project, and it currently displays detections within NWS tornado warning polygons to reduce false positives.
Do I need the $60/month plan for severe weather alerts?
Not for all of them. On ZoomRadar, warnings, watches, storm tracks, and seasonal overlays are available starting at $30/month. Real-time tornado detection specifically requires ZoomRadar’s $60/month Map plan.
Getting Started
Severe weather doesn’t wait for a development cycle, and neither should your alerts. ZoomRadar’s setup process takes just a few steps from subscription to a live, embedded map — well ahead of the next storm system your coverage area sees. Whether you’re a local news site, a community platform, or an emergency services organization, the same setup applies: choose a plan, share your coverage area, enable the overlays you need, and embed the map ZoomRadar sends back.