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🗺Interactive global map — live NEXRAD radar (US), NASA global precipitation (IMERG), GOES-East satellite cloud imagery, NWS warning overlays, temperature, and wind
📊Live risk scoring — 0–100 storm risk index updated every minute for your area
⚡Upgrade to Pro — unlock phone call alerts for tornado warnings, background push notifications, multi-city monitoring, and wildfire & earthquake overlays
Set up push notifications now, or start a Pro trial later from Settings to unlock phone call alerts and background monitoring.
Push notifications require Pro. Delivered via ntfy.sh — free to use.
1. Install the ntfy app on your phone
2. In the app, add this topic: the part after ntfy.sh/ in the URL above
3. Click Save below
Already have a topic from another app? Replace the URL above with yours.
NewSPC-conditioned Risk Scores · NASA IMERG global precip · GOES-East IR satellite
KNOW BEFORE THE STORM
When a tornado warning is issued for your location, VORTEX calls your phone. Not a push notification you might sleep through — an actual phone call. It also fires a proximity alert if a tornado is tracking within miles of you, even if the warning is in a neighboring county.
Start a free Pro trial anytime from within the app.
Best used alongside NOAA Weather Radio as part of a complete preparedness plan.
vortexintel.app
< 60s
Alert Delivery
0–100
Risk Score
24/7
Monitoring
📞
Phone Call Alerts
When a tornado warning is issued for your location, VORTEX calls your phone. It also fires a proximity alert if a tornado is tracking within miles of you — even if the warning is in a neighboring county. Pro also includes push notifications for watches, floods, winter storms, wind warnings, and rapid pressure drops.
🗺
Live Weather Map
Interactive map with live NEXRAD radar, NASA global precipitation (IMERG), GOES-East satellite infrared, active NWS warning polygons, and a 30+ year archive of past tornadoes. Alaska & Hawaii get their own quick-zoom cards. Pro adds background alerting, multi-city monitoring, and wildfire & earthquake overlays.
📊
Storm Risk Scoring
A 0–100 composite danger index calculated from real atmospheric data. Know how dangerous conditions are at your exact location before the NWS issues anything. Smart alerts fire once per threat episode — no 30-minute repeats spamming you through long-duration events.
CAPE 35Helicity 30Shear 15LI 10Dewpt 6RH 4= 100
📰
Briefings & History
Daily plain-English storm briefings generated from SPC outlooks and the last 24 hours of storm reports. Plus city-by-city tornado history pages covering every surveyed touchdown within 25 miles — going back to 1950. Free for everyone.
In the summer of 2024, a tornado passed through a campground in Rogers, Arkansas while my family was sleeping in a camper. No warning. Not even sirens. I'm a software engineer. I built this so it doesn't happen to you.
— Jordan Hansen, Founder
Pricing
$4.99/mo
or $39.99 / year — save 33%
Phone calls for tornado warnings + proximity alerts
Flash flood warning calls (opt-in)
All NWS push notifications + risk score & pressure drop alerts
Multi-location monitoring — home + up to 3 cities
Background alerting 24/7, even when app is closed
Wildfire & earthquake map overlays
Alert history (30 days) + prewarmed weather cache
Philips Hue smart-light integration (Beta)
Cancel anytime
Start a 14-day free Pro trial anytime from within the app.
The live weather map, risk score, NWS warning polygons, past tornadoes, and daily storm briefings are free for everyone.
Best used alongside NOAA Weather Radio as part of a complete preparedness plan.
Push notifications require Pro. Delivered via ntfy.sh (free to use). We've suggested a unique topic above — install the ntfy app, add the topic shown (the part after ntfy.sh/), then save. Already have a topic? Replace the URL with yours.
Tornado Watch Push
Push when a tornado watch is issued for your area
Severe Thunderstorm Watch Push DEFAULT OFF
Push when a severe thunderstorm watch is issued for your area (never calls)
Flood Watch Push DEFAULT OFF
Push when a flood watch is issued for your area (never calls)
Flash Flood Watch Push DEFAULT OFF
Push when a flash flood watch is issued for your area (never calls)
Severe Thunderstorm Warning Push
Push when a severe thunderstorm warning is issued for your area
Flood Warning Push
Push for flash flood & flood warnings in your area
Winter Storm Push
Push for winter storm, blizzard & ice storm warnings
High Wind Warning Push
Push for high wind & extreme wind warnings
Rapid Pressure Drop Push
Push when barometric pressure drops ≥ 2 mb in 30 minutes — a real-time sign a severe storm is approaching
Calls fire once per warning for your home and alert-enabled cities. Leave blank to disable.
Tornado Warning Calls🔒 PRO
Call when a tornado warning is issued for your area
Flash Flood Warning Calls🔒 PRO
Call when a flash flood warning is issued for your area
Proximity Alert Call🔒 PRODEFAULT OFF
Call when a tornado is within your proximity radius and approaching — including storms in neighboring counties
Get at http://[bridge-ip]/debug/clip.html · Only activates when the app is open on the same network as your bridge
Larger text
Bump text size ~12.5% for easier reading. Syncs across devices when signed in.
VORTEX can't reach you by email. Update your address to keep receiving alerts.
🌪
SCORING UPDATE
NEW: Tornado Risk Scores are now conditioned by the live SPC Day 1 tornado outlook. Quiet days no longer read 90+. The new SPC badge shows the outlook tier behind the number, and custom RISK alerts will fire less often on days with no tornado outlook.
📱
ADD VORTEX TO HOME SCREEN
App-like alerts — no app store required
HOW DID YOU FIND VORTEX?
One tap — helps us reach more people before the next storm
📱
ADD VORTEX TO HOME SCREEN
Tap Share⎙ → "Add to Home Screen"
Get app-like alerts without the App Store
VORTEX
STORM INTELLIGENCE PLATFORM
DATA LIVE
LOADING…
NWS: …
--:--:-- UTC
?
Loading…
Favorites
● ACTIVE NOW
All Layers
Selected Conditions
Click a station or map point
TEMP
--°F
HUMIDITY
--%
WIND
--mph
DEWPT
--°F
CAPE
--J
SRH
--m²/s²
📍 NW ARKANSAS
AVG TEMP
--°
AVG WIND
-- mph
AVG CAPE
-- J
--
AREA RISK SCORE
LOADING…
Tornado Risk Score
--
SELECT POINT
SPC TORNADO: —
CAPE
--
SRH
--
SHEAR
--
LIFT IDX
--
⚠
Your VORTEX alerts cannot reach youReal-time tornado calls bypass Do Not Disturb on iPhone. Configure push, phone, or ntfy in Settings to start receiving alerts.
🔕
Notifications are paused — alerts are NOT being deliveredYour channel is set up but push delivery is off. Turn it on to start receiving alerts.
🚨 YOU ARE INSIDE A WARNING ZONE
⚠ Weather data unavailable
⚠ WEATHER DATA DEGRADED — basics via NWS backup; severe params are last-known values
REPLAY DATE
🌪 Past Tornadoes—
—· source: SPC
EF0EF1EF2EF3EF4EF5Prelim° = from NWS damage survey
🔴 Past Warnings—
—· source: NWS via IEM
🎯 SPC OUTLOOK · TODAY—
❄️ Observed Snow
—
🌨 Snow Forecast
—
LIVE
Loading map…
Active Alerts …
Loading NWS alerts…
Alert History
No alerts in the last 30 days.
Notifications
Push Notifications PRO
Background alerts via ntfy.sh
Smart Lights PROBETA
Philips Hue
Audio Alarm
Browser siren — works while app is open
Lights: standby
Alert Thresholds
Risk Score Trigger
65
65 ELV75 HIGH90 EXTR100
Push when Risk Score exceeds this — no active warning required. Fires once per crossing; rearms on a 5-pt dip, or 6h fallback. Why?
Warning Proximity Radius
Pro: Calls when a tornado is within this distance and approaching — even if the warning is in a neighboring county
Light Alert Modes
🔴 Tornado Warning
Red flash rapid
🟡 Tornado Watch
Amber pulse slow
🔵 Advisory
Blue steady
SPC OUTLOOK: LOADING
ACTIVE ALERTS: –
UPDATED: --:--
CURSOR: hover map
Open-Meteo + NWS · Live
📍 HOME--LOW
Map Layers
Favorites
● ACTIVE NOW
All Layers
Local weather
AVG TEMP
--°
AVG WIND
-- mph
AVG CAPE
-- J
--
AREA RISK SCORE
LOADING…
Conditions
Selected Point
Tap a station or map point
TEMP
--°F
HUMIDITY
--%
WIND
--mph
DEWPT
--°F
CAPE
--J
SRH
--m²/s²
Tornado Risk Score
--
TAP POINT
SPC TORNADO: —
CAPE
--
SRH
--
SHEAR
--
LIFT IDX
--
Active Alerts …
Loading NWS alerts…
Alert History
No alerts in the last 30 days.
Settings
Notifications
Push Notifications PRO
Background alerts via ntfy.sh
Smart Lights PROBETA
Philips Hue
Audio Alarm
Browser siren — works while app is open
Alert Thresholds
Risk Score Trigger
65
65 ELV75 HIGH90 EXTR100
Push when Risk Score exceeds this — no active warning required. Fires once per crossing; rearms on a 5-pt dip, or 6h fallback. Why?
Warning Proximity Radius
Pro: Calls when a tornado is within this distance and approaching — even if the warning is in a neighboring county