How Tornadoes Form
The formation of a tornado can be broken down to three stages: 1) low level horizontal spin,…
Understanding Hail
Hail, Showery precipitation in the form of irregular pellets or balls of ice more than 5 mm…
Severe Weather Preparedness
Tornadoes, floods, thunderstorm winds, hail, lightning, heat, wildfires, rip currents and tsunamis - spring is three months…
Search Local Weather Conditions
Criteria For a Hurricane Warning
The National Weather Service (NWS) is the official U.S. government agency charged with issuing weather watches, warnings, and advisories and is the source used by iAlert.com. Below is the criteria used by NWS forecasters when issuing…
Criteria For a Tropical Storm Warning
The National Weather Service (NWS) is the official U.S. government agency charged with issuing weather watches, warnings, and advisories and is the source used by iAlert.com. Below is the criteria used by NWS forecasters when issuing…
About the National Hurricane Center
Throughout our nation’s history, hurricanes have taken thousands of lives and caused billions of dollars in damage and loss. The National Hurricane Center (NHC) was established in 1898 by President William F. McKinley to mitigate the…
Heat Index Calculator
During hot summer days it sometimes feels hotter outside than the actual temperature suggests and it might very well be when you consider the "Heat Index". The heat index is a mathematical combination of air temperature…
Your Local Weather Radar | Live Doppler Radar
The National Weather Service (NWS) operates a network of 154 Dopplar Radar sites across the United States, commonly called NEXRAD for Next-Generation Radar. These weather radars provide a view inside a storm where its behavior…
2012 Atlantic Hurricane Names | 2012 Atlantic Tropical Cyclone Reports
Hurricanes are named alphabetically from a predetermined list beginning the letter "A" through "W", excluding names that begin with "Q" or "U." A storm is first named by the National Hurricane Center when the system becomes…
Why am I receiving duplicate severe thunderstorm warnings and tornado warnings?
The simple answer is, you're not receiving duplicate alerts. Let me explain.... The official source of severe thunderstorm warnings and tornado warnings is the National Weather Service (NWS) and is the source used by iAlert.com. There…
What type of alerts can I receive with iAlert.com?
iAlert.com proudly supports "All Hazard" alerts from severe thunderstorm, tornado warnings, and civil emergency messages as issued by federal, state, and local authorities. Learn how you can receive any or all of these alerts by text…
What is the difference between a Weather Watch, Warning, and Advisory?
WATCH A watch is issued when the risk of hazardous weather has increased significantly, but its occurrence, location, or timing is still uncertain.? A watch is intended to provide lead time to prepare for the potential…
