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From severe weather, flooding, and winter storms to lightning detection, daily forecasts, and more, all alerts delivered by email, SMS/Text or voice call for any U.S. location.

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Authoritative Source

Authoritative data from the National Weather Service. iAlert delivers the weather intelligence: turning watches, warnings, and detection data into precision alerts since 2010.

  • 1,011,723 Storm reports archived
  • 970,188 NWS alerts archived
  • 3,018,722 Alerts sent
  • 16+ yrs Continuous operation

Top Stories

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Understanding National Weather Service “Severe Weather Outlook”

Example Outlook Below Severe weather outlooks, also commonly referred to as convective outlooks, are issued daily by the National Weather Service Storm Prediction Center in both text and graphic form.  iAlert hosts the severe weather outlook graphics which you can access by clicking…

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2026 Atlantic Hurricane Names

Hurricanes are named alphabetically from a predetermined list beginning with the letter “A” through “W”, excluding names beginning with “Q” or “U.”A storm is first named by the National Hurricane Center when the system becomes a tropical storm. The name remains as it…

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Thunderstorm Basics: Structure, Types, and Forecasting Methods

Thunderstorms are among the most powerful weather events on Earth. They can bring much needed rainfall, yet they also produce dangerous hazards such as lightning, hail, flash flooding, and tornadoes. Understanding how storms form, how they evolve, and how meteorologists detect and forecast…

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Cloud Types

Looking at the clouds it may appear there are endless cloud types, however you may be surprised to know there are really only 4 core types.? From his Essay of the Modifications of Clouds (1803) Luke Howard divided clouds into three categories; cirrus…

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The Hydrologic Cycle

The hydrologic cycle involves the continuous circulation of water in the Earth-Atmosphere system. At its core, the water cycle is the motion of the water from the ground to the atmosphere and back again. Of the many processes involved in the hydrologic cycle…

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Lightning Strike: What are the Capabilities of Lightning Detection Systems

Two decades before the American Revolutionary War, noted inventor and scientist Benjamin Franklin had a strong curiosity when it came to the incredibly destructive force of lightning. Franklin is known for inventing one of the first lightning rods, which he used to prevent…

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Why iAlert

Mark McInerney

Founder

Mark McInerney

Former National Weather Service meteorologist. Led the Watch, Warning and Advisory program for over twenty years.

About

Alert Service

Severe Weather Alerts

Tornado, flood, winter storm, and hurricane watches and warnings delivered in real-time.

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Alert Service

Lightning Detection Alerts

Lightning strike detection with configurable distance rings. Built for outdoor operations where timing is everything.

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Alert Delivery Options

  • Email
    HTML or plain text, every alert
  • SMS / Text
    Instant to any mobile number
  • Voice Call
    Spoken alert, no app required
📞 Phone Call Alert Sample
Alert message read aloud to you:
"Hello, this is an iAlert.com weather message. Severe Thunderstorm Watch issued March 16 at 8:18PM until March 17 at 12:00AM for Washington DC. This concludes the message. Goodbye."
▶ Play sample call recording
📊 Weather Intelligence

Annual Weather & Alert Reports

Deep-dive analysis of severe weather activity, alert volumes, and regional trends — published annually to help businesses and communities understand weather risk.

7Annual Reports
1M+Storm Events
9,600+Tornadoes Documented
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