Tropical?Cyclone: A warm-core non-frontal synoptic-scale cyclone, originating over tropical or subtropical waters, with organized deep convection and a closed surface wind circulation about a well-defined center. Once formed, a tropical cyclone is maintained by the extraction of heat energy from…
[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 Valley to the Southern…
[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 Snow and Ice Data…
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. Join us on Twitter Wednesday, April…
[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 high. This image was…
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 England increase the risk…
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…
[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 that there are really…
[caption id="attachment_3033" align="aligncenter" width="397"] Rip Current Safety Chart (Click to Enlarge)[/caption] Stay safe at the beach this summer and know the signs of a rip current. Rip Current:?"A small-scale surf-zone current moving away from the beach.? Rip currents form as…
