Wall cloud, F. A watch can cover parts of a state or several states. Begin typing your search term above and press enter to search. Press ESC to cancel. Useful tips. Esther Fleming March 29, Table of Contents. Previous Article What is the write up on the back of a book called?
After Wyoming, the next deadliest deaths per million states are Utah 0. Of course, this is a bit of a meaningless statistic since these western states host millions of tourists every summer. Wyoming, for instance, may be the least populated state in the union about , residents but it sees about 2 million summer visitors to its national parks like Yellowstone and the Grand Tetons during the summer months. Many of these are alpine climbers and backcountry trekkers.
So, of course, they are subject to the storms that occur during the peak climbing and hiking months of the summer. The maps above show the total number of deaths by lightning by state top and deaths ranked by number per million of residents bottom.
The period of record for both maps is Moments after this photograph was taken these two boys were struck by lightning and seriously injured. A nearby hiker was killed. Photo by Mary McQuilken sister of the two boys. Stormiest Places in the World The area that experiences the most thunderstorm days in the world is northern Lake Victoria in Uganda, Africa.
In Kampala thunder is heard on average days of the year, although the actual storms usually hover over the lake and do not strike the city itself. The reason for the incredible number of storms here is best summed up by F.
By Brian Donegan July 01, The figure above shows the average number of thunderstorm days each year throughout the United States. At a Glance Most of the cities on the list are in the South. The state with the most cities on the list? Lightning strikes during a thunderstorm on July 6, in Las Vegas, Nevada. Bizarre Red and Green Mountain.
During June through August, the locus of thunderstorm activity shifts to the Northern Hemisphere, where it is summer. The difference in thunderstorm activity between the two maps is especially noticeable in North America and Central America. Thunderstorms in mainland Asia are tied closely to the summer monsoon , when surface heating combines with moist onshore flow to create strong convection.
Central Africa , straddling the equator, reports thunderstorms during both seasons. Sinking air in the descending limb of the Hadley cell, combined with limited moisture, suppresses the development of thunderstorms in the Sahara and Arabian Deserts. This map shows the frequency of thunderstorms in different parts of the U. Few thunderstorms occur on the Pacific Coast, even though there are many rainy days. Surface heating is seldom strong enough to create free convection.
The difference between air masses across frontal boundaries is too slight to generate vigorous uplift. Cold air masses are not bitterly cold, and warm air masses are not too hot due to the moderating influence of the Pacific Ocean.
Orographic uplift can generate an occasional thunderstorm, but even these are not too frequent as most of the coastal ranges are not very high and the highest ones are farther north, next to cold ocean waters. Thunderstorms are somewhat more common elsewhere in the West, even though moisture is relatively scarce. More thunderstorms occur on the peaks of the highest mountains, where surface daytime heating moves air upslope from all sides, converging at the peaks and forcing additional uplift.
In the Midwest and Northeast, thunderstorms increase in frequency from north to south. Water-vapor capacities in the northern states are so low most of the year that they limit the supply of atmospheric moisture available for release as latent heat during condensation, which is essential to generate severe storms.
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