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…
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3 Day Severe Weather Risk Issued May 7, 2015
[caption id="attachment_3224" align="aligncenter" width="473"] 3 day Severe Weather Risk issued May 7 2015 . Watch for forecast updates (Click to Enlarge)[/caption] Thursday May 7, 2015 Isolated to scattered severe storms are possible from the upper Mississippi…
Satellite View of Changing Arctic
[caption id="attachment_3203" align="aligncenter" width="455"] This image shows the sea ice concentration on September 17, 2014, along with a yellow line indicating the median sea ice extent for 1981-2010. Credit: NOAA[/caption] According to analysis by the National…
TweetChat: Spring Weather Preparedness – April 29, 2PM ET #WxPrepChat
Spring has sprung, ushering in a new season of hazardous weather. Tornadoes, floods, thunderstorm winds, hail, lightning, heat, wildfires, rip currents and tsunamis are some of the of hazards that can be dangerous for the unprepared.…
Satellite Image of Calbuco Volcano Eruption in Chile
[caption id="attachment_3190" align="aligncenter" width="461"] Credit NOAA (Click to Enlarge)[/caption] Calbuco Volcano in southern Chile has erupted for the first time since 1972, with the last major eruption occurring in 1961 that sent ash columns 12-15 kilometers…
2015 U.S. Spring Flood Outlook
Record snowfall and unusually cold temperatures in February through early March retained a significant snowpack across eastern New England and western New York raising flood concerns. Significant river ice across northern New York and northern New…
Understanding Hail
Hail, Showery precipitation in the form of irregular pellets or balls of ice more than 5 mm in diameter, falling from a cumulonimbus cloud. Ok great with the definition out of the way we can breakdown…
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…
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…
What is a Supercell?
[caption id="attachment_3058" align="aligncenter" width="450"] Supercell (click to enlarge)[/caption] A Supercell is a severe thunderstorm with a deep, persistently rotating updraft (a mesocyclone). Supercell thunderstorms are the largest, most severe class of thunderstorms. It has been argued…
