WeatherAlarm watches every address that matters to you — your parents’ place, the kids at college, the cabin — and pushes a National Weather Service warning typically within seconds of it being issued, with the storm’s distance, heading, and minutes to their door.
iPhone, iPad and Android. Built by one developer and given away free.
Add Mom, Dad, Grandma, the college apartment — each with a name, a photo from your contacts, and its own place in the list. Every location is matched against the official warning polygon on its own, so a warning for Grandma is about Grandma’s house, not her county.
WeatherAlarm listens to the National Weather Service’s real-time wire — the same feed broadcasters use — so a tornado warning is on your lock screen typically within seconds of the forecaster issuing it. And it doesn’t just say “a warning near Mom.” It says the storm is 3.1 miles out, heading toward her, about five minutes away.
When a warning expires, WeatherAlarm replays the storm’s whole life at that exact address — peak winds, rainfall, damage reported nearby — and tells you whether it’s worth a call. It runs on your phone, from the radar itself, and when the honest answer is “they were likely fine,” it says so rather than leaving you to wonder.
Turn off heat advisories for the cabin in Maine. Keep tornado warnings on everywhere. Silence special weather statements globally but leave them on for Dad, because he’s the one who’d want to know. Every location can have its own notification settings — and every alert still shows in the app. This only changes what interrupts you.
NEXRAD Level II super-resolution radar from every site in the country, decoded on-device rather than streamed as a blurry tile — reflectivity, velocity, storm-relative velocity, correlation coefficient, VIL, echo tops. Storm cells tracked with projected cones. Live GOES satellite draped over it. A future-radar loop eighteen hours out. Rewind a full day and share the loop.
Is their power out? Is the heat dangerous for them, or just hot? How high will the river get? Did the warning just get worse?
Where a utility publishes street-level outages, the card says their own address looks affected. Elsewhere it says how much of the area is dark, always naming the utility — and says nothing rather than implying the lights are on.
NWS HeatRisk accounts for how unusual the heat is for that place and time of year, and how long it lasts. Ninety degrees somewhere used to it isn’t ninety where it never happens.
During a flood warning, the nearest NOAA gauge and its forecast crest — the peak the Weather Service expects, when, and whether that clears flood stage.
A re-issued warning says what actually changed — hail or wind revised, the expiration moved, a tornado now observed — worst first, so you aren’t re-reading the whole bulletin to find it.
Text any warning, watch, or the day’s outlook to family with one tap. They get a clean preview and a link that opens the app — or a web page if they don’t have it yet.
Your most urgent active alert at a glance, or a calm all-clear when nothing is happening. Updates in the background without opening the app.
Severe-thunderstorm warnings escalate through Considerable and Destructive; tornado warnings through Confirmed, PDS, and Emergency. When a storm worsens, you get a fresh update.
Every alert carries a plain-language explainer of exactly why it reached you — which location matched, and how. No mystery notifications.
The EPA index colour-coded like AirNow, plus a health note that accounts for smoke in the area even when the sensor itself still reads clean.
Active wildfire perimeters and smoke forecasts on the map, with the distance to the nearest fire right on a location’s own screen.
NOAA’s odds of four-plus inches of snow or a quarter-inch of ice, three days out. Snow squalls tracked live on radar like the storms they are. The overnight refreeze window that never comes with a warning.
Paste a Google or Apple Maps link a family member sent, or press the exact spot on the map — for the house an address search can’t find, a campsite, or a place with no street number at all.
An address, a city, a ZIP, a pasted map link, or a pin. Give it a name that means something to you.
Every NWS warning and Storm Prediction Center outlook is matched against each place you added, the moment it’s issued.
A push with what it is, who it’s for, how far away the storm is and roughly when it arrives.
Live radar on the alert, the storm’s path, and — once it’s over — a report on what actually happened at their address.
There is no company behind WeatherAlarm and no investor waiting to monetize it. It stores the addresses you add and the token that lets it reach your phone — nothing else — and sells nothing to anyone.
No purchase, no subscription, no premium tier holding the radar hostage.
No email, no password, no sign-up. Install it and add a name.
No analytics, no advertising SDKs, nothing sold or shared. Photos never leave the phone.
I’m one developer, not a company. WeatherAlarm started on a phone call with my mom during a severe-weather event: her kids are spread across several states, and she was calling each of us, one at a time, to check in. She was the one trying to keep track of everyone, and she had no tool for it. So I built one.
It’s the app I wanted for my own family — watching over the people I love wherever they are, without ads, without selling anyone’s data, and without a paywall between a family and a tornado warning. That’s the whole idea, and it’s why it’s free.
— Jason, WeatherAlarm
Every feature, in one place. The ones marked new arrived in the latest release.
Built on official data. NOAA and the National Weather Service, the Storm Prediction Center, the National Hurricane Center, NEXRAD Level II and III radar, GOES satellite, the HRRR model, EPA AirNow, NIFC wildfire perimeters, Vaisala Xweather lightning, and the Iowa Environmental Mesonet. Maps by OpenStreetMap via MapTiler and OpenFreeMap. How it all fits together →
Know before severe weather arrives — for everyone you care about.
Or send someone weatheralarm.net/download — it takes them to the right store.