Wednesday, June 17, 2015

Tropical Storm Bill

Tropical storm development
Tropical storm development shows how important atmosphere-ocean interactions are in climate and weather. Tropical storms introduce and transport enormous amounts of heat and moisture into the atmosphere.

The video below shows the formation of Tropical Storm Bill in June 15 through June 17, 2015  as it makes it way westward across the the Gulf of Mexico in the easterly trade winds (remember: easterly trade winds flow FROM the East carrying weather systems westward).  Note that this is not a hurricane. A hurricane would be rotating more quickly and have an "eye" in the middle as it intensifies. These systems can cause severe flooding because of the tremendous amount of water that evaporates from the warm ocean surface of ther Gulf of Mexico  in the atmosphere




Current satellite imagery
You will be able to see how this tropical system dies out as it makes it way northward and its moisture and cloud gets advected and dispersed (that is to say transported blown) eastward in the mid-latitude westerlies. A little guide to the imagery is provided below. Note that blue indicates cold cloud tops (the colder the higher) while red generally represents surface temperatures.   You should be able to see the cloud and precipitation due to the moisture of this system if you are in Southern New England.

Link to satellite imagery.