Typhoons form in the tropical oceans when areas of high pressure rush toward areas of low pressure, which creates wind. When the storm begins to rotate and organize around an "eye" of low pressure, it is well on its way to becoming a typhoon. Storms are categorized as typhoons when they reach wind speeds of 74 miles per hour.Know More
The process begins when the surface of the ocean heats up. The higher temperatures and humidity levels over the ocean create disturbances in air pressure. When these disturbances strengthen, the wind begins to spiral toward a center of low pressure, drawing moisture to the center, which forms the eye. When the storm becomes organized, it develops into a tropical depression. Once wind speeds reach 39 miles per hour, it becomes a tropical storm.The eye of low pressure develops, and the storm begins to rotate and gain in strength. The storm becomes a typhoon when it reaches wind speeds of 74 miles per hour.
Storms that develop around North and Central America are known as hurricanes. Storms that develop in the Northwest Pacific are known as typhoons. The spiraling in the storm is caused by the Earth's rotation, and because the winds curve, these storms cannot form on or near the equator. A storm must be at least 300 miles away from the equator to develop into a typhoon.Learn More
A flash flood is a sudden flood in a low-lying area, most commonly caused by periods of particularly heavy rainfall. They can also occur when a dam breaks or a river overruns its banks. Flash floods generally occur over a period of 6 hours or less.Full Answer >
Thunderstorms occur most often throughout the western and southeastern United States and along the Gulf Coast. They can form all throughout the year and at any hour during the day, but are more common during the summer and spring. The majority of thunderstorms in the Plains states develop during the afternoon, but regularly occur late in the afternoon and during nighttime hours.Full Answer >
There are two major tornado seasons in Kansas: the first season begins in early May and ends in late June, and the second season starts in November.Full Answer >
The Tri-State Tornado of 1925 occurred due to the confluence of multiple meteorological conditions. An eastward moving low pressure system pushed a warm front northward, while a cold front simultaneously approached from the southwest. This created a large draw of warm moist air from the Gulf of Mexico into the tri-state region of Missouri, Illinois and Indiana. These conditions coupled with an accelerated jet stream triggered the event.Full Answer >