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Tornado Watch - Active Severe Weather Alerts
Live severe weather monitoring across the United States 🇺🇸 and Canada 🇨🇦.Live 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.
Areas Affected
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Last Updated
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Next update in
1:00
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 WarningsNorth American Severe Weather
3/3Filter alerts from US (NWS) and Canadian (ECCC) weather services
1 active • 1 types
Live Severe Weather Alerts
Live Updates
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1 Active Alert
1:00
Updated: Never
Severe Thunderstorm Warning
Issued: Never
Expires in 0s
Issued: Never
Expires in 0s
Country
🇺🇸
States:
UT
Counties Affected:
Box Elder, Davis, Weber
Est. Population:
507,655
Country
🇺🇸
States:
UT
Counties:
Box Elder, Davis, Weber
Est. Population:
507,655
What's happening?
Stay Safe During Severe Weather
Available on web, iOS & Android
Track live tornado warnings with our mobile app or get phone, text & email alerts for your locations
Expired Alerts
Expired Severe Weather Alerts
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0 Expired Alerts
Updated: Never
These alerts have expired in the last 24 hours and are no longer active.
Special Marine Warning
Cancelled: Never
Issued: Never
Cancelled: Never
Country
🇺🇸
Waters:
HI
Marine Areas Affected:
Maui
Country
🇺🇸
Waters:
HI
Areas:
Maui
Marine Hazard Information:
At 647 PM HST, severe thunderstorms capable of producing waterspouts were located along a line extending from 17 nm northwest of FAD Buoy N to 13 nm south of FAD Buoy HH, moving east at 25 knots.
Special Marine Warning
Expired: Never
Issued: Never
Expired: Never
Country
🇺🇸
Waters:
HI
Marine Areas Affected:
Maui
Country
🇺🇸
Waters:
HI
Areas:
Maui
Marine Hazard Information:
At 526 PM HST, strong thunderstorms were located along a line extending from 9 nm southeast of FAD Buoy T to 11 nm south of Hanauma Bay, moving east at 20 knots.
Severe Thunderstorm Warning
Expired: Never
Est. Pop: 10,676
Issued: Never
Expired: Never
Country
🇺🇸
States:
CA
Counties Affected:
Amador, Calaveras, Tuolumne
Est. Population:
10,676
Country
🇺🇸
States:
CA
Counties:
Amador, Calaveras, Tuolumne
What's happening?
At 839 PM PDT, a severe thunderstorm was located over Mountain Ranch, or 10 miles east of San Andreas, moving northeast at 25 mph.
Today's Outlook
Today's Severe Weather Outlook (Loading date...)
This outlook map shows the overall severe weather risk today, including tornadoes, damaging winds, and large hail, based on data from NOAA's Storm Prediction Center. Risk levels range from General Thunder (TSTM) to High, with each category indicating increasing severity and coverage of severe weather.
View official SPC Day 1 OutlookTomorrow's Outlook
Tomorrow's Severe Weather Outlook (Loading date...)
This outlook map shows the overall severe weather risk on Day 2 (tomorrow), including tornadoes, damaging winds, and large hail, based on data from NOAA's Storm Prediction Center. Risk levels range from General Thunder (TSTM) to High, with each category indicating increasing severity and coverage of severe weather.
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. Data comes from the National Weather Service (US) and Environment and Climate Change Canada (ECCC).
Types of Alerts We Track
Tornado Watch
Conditions are favorable for tornado development in the watch area.
- Typically covers multiple counties or states
- May cover extended time periods
- 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
- Covers a defined duration
- Covers specific storm areas
- Requires attention and action
Special Marine Warning
Hazardous marine conditions including waterspouts.
- Waterspouts can move onshore as tornadoes
- Affects coastal and marine areas
- Important for maritime safety
- May be associated with tornado warnings
Mesoscale Discussion
Technical updates about storm development and potential.
- Forecaster insights on storm evolution
- Probability of severe weather
- Details on watch/warning issuance
- Areas of greatest concern
How to Use This Page
This page tracks conditions associated with potential tornado development. While our main page focuses on active tornado warnings, here you'll find the broader severe weather alerts:
- 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
Automatic Updates
Data refreshed automatically from NWS & ECCC
Precise Mapping
Exact alert areas with radar overlay
Official Source
Official sources: NWS (US) & ECCC (Canada)
