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Tornado Watch - Active Severe Weather Alerts
Real-time severe weather monitoring across the United States 🇺🇸 and Canada 🇨🇦.Real-time severe weather monitoring across the United States 🇺🇸 and Canada 🇨🇦 using official National Weather Service (NWS) and Environment and Climate Change Canada (ECCC) data. We track tornado watches, severe thunderstorms, and marine warnings that could potentially develop into tornadoes to keep communities prepared and informed.
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Data Source
🇺🇸 NWS
🇨🇦 ECCC
Tornado Watch
This page monitors tornado watches, severe thunderstorms, and special marine warnings that could develop into tornadoes. These are early indications about conditions favorable for tornado formation.
For active tornado warnings (confirmed tornadoes on the ground or detected by radar), visit our main tornado monitoring system.
View Active Tornado WarningsView Tornado WarningsNo active severe weather alerts
Expired Alerts
Expired Severe Weather Alerts
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Today's Outlook
Today's Severe Weather Outlook (Loading date...)
This outlook map shows areas where severe weather (primarily damaging winds) is most likely to occur today, based on data from NOAA's Storm Prediction Center. Risk levels range from Marginal (MRGL) to High, with higher percentages indicating greater severe weather probability.
View official SPC Day 1 OutlookTomorrow's Outlook
Tomorrow's Severe Weather Outlook (Loading date...)
This outlook map shows areas where severe weather (primarily damaging winds) is most likely to occur on Day 2 (tomorrow), based on data from NOAA's Storm Prediction Center. Risk levels range from Marginal (MRGL) to High, with higher percentages indicating greater severe weather probability.
View official SPC Day 2 OutlookAbout Tornado Watch Tracking
Our tornado watch monitoring system tracks potentially tornadic weather conditions across North America, including tornado watches, severe thunderstorms, and marine warnings. Real-time data comes from the National Weather Service (US) and Environment and Climate Change Canada (ECCC), updating every 60 seconds.
Types of Alerts We Track
Tornado Watch
Conditions are favorable for tornado development in the watch area.
- Typically covers multiple counties or states
- Usually issued 4-8 hours in advance
- Time to prepare and stay weather-aware
- Monitor for possible warnings
Severe Thunderstorm Warning
Storm capable of producing damaging winds and/or large hail.
- May develop rotation and spawn tornadoes
- Typically 30-60 minute duration
- Covers specific storm areas
- Requires immediate attention
Special Marine Warning
Hazardous marine conditions including waterspouts.
- Waterspouts can move onshore as tornadoes
- Affects coastal and marine areas
- Important for maritime safety
- Often precedes tornado warnings
Mesoscale Discussion
Technical updates about storm development and potential.
- Forecaster insights on storm evolution
- Probability of severe weather
- Timing of watch/warning issuance
- Areas of greatest concern
How to Use This Page
This page serves as an early warning system for potential tornado development. While our main page focuses on active tornado warnings, here you'll find the conditions that often precede tornado formation:
- Monitor tornado watches to know when conditions are favorable
- Track severe thunderstorms that could develop rotation
- Watch for special marine warnings that may indicate waterspouts
- Follow storm progression and intensification
60-Second Updates
Fresh data from NWS & ECCC every 60 seconds
Precise Mapping
Exact alert areas with radar overlay
Official Source
Official sources: NWS (US) & ECCC (Canada)
