Active Alerts
-
Updating...
Last updated: Never
Tornado Watch
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.
Areas Affected
-
Last Updated
Loading...
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
Loading...
Live Severe Weather Map
Live Updates
Loading active weather alerts...
Connecting to National Weather Service
Active Severe Weather Alerts
Loading alerts...
1:00
Updated: Never
Loading active severe weather alerts...
Expired Severe Weather Alerts Map
Loading weather alerts map...
Expired Severe Weather Alerts
0 Expired Alerts
Updated: Never
These alerts have expired in the last 24 hours and are no longer active. They provide historical context of recent severe weather in the area.
Special Marine Warning
Expired: Never
Issued: Never
Expired: Never
Country
🇺🇸
Waters:
FL
Marine Areas Affected:
Straits of Florida from Ocean Reef to Craig Key 20 to 60 NM out; Straits of Florida from Craig Key to west end of Seven Mile Bridge 20 to 60 NM out
Country
🇺🇸
Waters:
FL
Areas:
Straits of Florida from Ocean Reef to Craig Key 20 to 60 NM out; Straits of Florida from Craig Key to west end of Seven Mile Bridge 20 to 60 NM out
Marine Hazard Information:
At 855 PM EST, a strong thunderstorm was located near Elbow Cay, moving west at 10 knots.
Special Marine Warning
Expired: Never
Issued: Never
Expired: Never
Country
🇺🇸
Waters:
FL
Marine Areas Affected:
Straits of Florida from Ocean Reef to Craig Key 20 to 60 NM out; Straits of Florida from Craig Key to west end of Seven Mile Bridge 20 to 60 NM out
Country
🇺🇸
Waters:
FL
Areas:
Straits of Florida from Ocean Reef to Craig Key 20 to 60 NM out; Straits of Florida from Craig Key to west end of Seven Mile Bridge 20 to 60 NM out
Marine Hazard Information:
At 825 PM EST, a strong thunderstorm was located near Elbow Cay.
Special Marine Warning
Expired: Never
Issued: Never
Expired: Never
Country
🇺🇸
Waters:
FL
Marine Areas Affected:
Straits of Florida from Ocean Reef to Craig Key 20 to 60 NM out; Straits of Florida from Craig Key to west end of Seven Mile Bridge 20 to 60 NM out
Country
🇺🇸
Waters:
FL
Areas:
Straits of Florida from Ocean Reef to Craig Key 20 to 60 NM out; Straits of Florida from Craig Key to west end of Seven Mile Bridge 20 to 60 NM out
Marine Hazard Information:
At 755 PM EST, a strong thunderstorm was located 10 nm west of Elbow Cay.
Special Marine Warning
Expired: Never
Issued: Never
Expired: Never
Country
🇺🇸
Waters:
FL
Marine Areas Affected:
Straits of Florida from Ocean Reef to Craig Key 20 to 60 NM out; Straits of Florida from Craig Key to west end of Seven Mile Bridge 20 to 60 NM out
Country
🇺🇸
Waters:
FL
Areas:
Straits of Florida from Ocean Reef to Craig Key 20 to 60 NM out; Straits of Florida from Craig Key to west end of Seven Mile Bridge 20 to 60 NM out
Marine Hazard Information:
At 652 PM EST, a strong thunderstorm was located 18 nm west of Elbow Cay, moving southeast at 5 knots.
Special Marine Warning
Expired: Never
Issued: Never
Expired: Never
Country
🇺🇸
Waters:
FL
Marine Areas Affected:
Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal 20 to 60 NM out
Country
🇺🇸
Waters:
FL
Areas:
Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal 20 to 60 NM out
Marine Hazard Information:
At 514 PM EST, strong thunderstorms were located along a line extending from 22 nm south of Wood's Wall West Crack to 53 nm south of Twenty-Eight Foot Shoal Light, moving east at 5 knots.
Special Marine Warning
Expired: Never
Issued: Never
Expired: Never
Country
🇺🇸
Waters:
FL
Marine Areas Affected:
Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal out to the reef; Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal out 20 NM
Country
🇺🇸
Waters:
FL
Areas:
Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal out to the reef; Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal out 20 NM
Marine Hazard Information:
At 500 PM EST, a strong thunderstorm was located near American Shoal Light, moving northwest at 10 knots.
Special Marine Warning
Expired: Never
Issued: Never
Expired: Never
Country
🇺🇸
Waters:
FL
Marine Areas Affected:
Straits of Florida from Craig Key to west end of Seven Mile Bridge 20 to 60 NM out
Country
🇺🇸
Waters:
FL
Areas:
Straits of Florida from Craig Key to west end of Seven Mile Bridge 20 to 60 NM out
Marine Hazard Information:
At 453 PM EST, a strong thunderstorm was located 17 nm southwest of Marathon Humps, moving east at 10 knots.
Special Marine Warning
Expired: Never
Issued: Never
Expired: Never
Country
🇺🇸
Waters:
FL
Marine Areas Affected:
Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal 20 to 60 NM out
Country
🇺🇸
Waters:
FL
Areas:
Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal 20 to 60 NM out
Marine Hazard Information:
At 452 PM EST, strong thunderstorms with possible waterspouts were located along a line extending from 20 nm south of Wood's Wall West Crack to 53 nm southwest of Wood's Wall East Crack, moving east at 10 knots.
Special Marine Warning
Expired: Never
Issued: Never
Expired: Never
Country
🇺🇸
Waters:
FL
Marine Areas Affected:
Straits of Florida from Craig Key to west end of Seven Mile Bridge 20 to 60 NM out; Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal 20 to 60 NM out
Country
🇺🇸
Waters:
FL
Areas:
Straits of Florida from Craig Key to west end of Seven Mile Bridge 20 to 60 NM out; Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal 20 to 60 NM out
Marine Hazard Information:
At 426 PM EST, a strong thunderstorm was located 24 nm southeast of Wood's Wall East Crack.
Special Marine Warning
Cancelled: Never
Issued: Never
Cancelled: Never
Country
🇺🇸
Waters:
FL
Marine Areas Affected:
Gulf of America from West End of Seven Mile Bridge to Halfmoon Shoal out to 5 Fathoms; Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal out to the reef; Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal out 20 NM
Country
🇺🇸
Waters:
FL
Areas:
Gulf of America from West End of Seven Mile Bridge to Halfmoon Shoal out to 5 Fathoms; Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal out to the reef; Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal out 20 NM
Marine Hazard Information:
At 358 PM EST, a strong thunderstorm was located over American Shoal Light, moving northwest at 10 knots.
Showing 1-10 of 20 alerts
Today's Outlook
Today's Severe Weather Outlook (Loading date...)
Today's Forecast
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...)
Tomorrow's Forecast
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)
