Weather radios are called “indoor tornado sirens” because they broadcast tornado warnings as soon as they are issued and can wake you while sleeping. Weather radios equipped with a siren feature will sound a weather alert giving immediate information about a life-threatening situation. NOAA Weather Radio (NWR) broadcasts National Weather Service weather alerts, warnings, watches, forecasts and other hazard information 24 hours a day.ĭuring severe weather, NWS forecasters interrupt regular broadcasting and send a special tone activating local weather radios. Why do I need a severe weather alert radio? Won't any radio do? Yes, Our FRS/GMRS will work with any other FRS brand on the market today. Can I use a Midland FRS/GMRS with other FRS/GMRS brands? It’s this uncertainty and the tornado’s ability to form rapidly that make a weather radio essential in any home. However, not all super cells will produce a tornado. What causes a tornado, and how do they form?Īccording to the Glossary of Meteorology (AMS 2000), a tornado is “a violently rotating column of air, pendant from a cumuliform cloud or underneath a cumuliform cloud, and often (but not always) visible as a funnel cloud.” According to the Storm Prediction Center, in order for a vortex to be classified as a tornado, it must be in contact with the ground and the cloud base. A large variety of weather patterns can lead to tornadoes, but they most often occur in super cells – which are rotating thunderstorms with a well-defined radar circulation called a mesocyclone. A strong updraft of air into the storm may begin to rotate as the wind changes direction higher in the atmosphere, which can produce a rapidly rotating column of air that eventually makes contact with the ground – a tornado. In the western North Pacific, hurricanes are called typhoons similar storms in the Indian Ocean and South Pacific Ocean are called cyclones. The cyclone is accompanied by thunderstorms and, in the Northern Hemisphere, a counterclockwise circulation of winds near the earth’s surface.Ī tropical cyclone is called a hurricane when maximum sustained winds reach or exceed 74 mph. What is a hurricane?Īccording to the National Hurricane Center, a hurricane is a type of tropical cyclone, which is a generic term for a low-pressure system that generally forms in the tropics.
The National Hurricane Center describes the peak of the Atlantic hurricane season as mid-August through late October. However, deadly hurricanes can occur anytime in the hurricane season. The Atlantic hurricane season runs from June 1st to November 30th, and the Eastern Pacific hurricane season runs from May 15th to November 30th. Major Hurricane: A tropical cyclone with maximum sustained winds of 111 mph (96 knots) or higher, corresponding to a Category 3, 4 or 5 on the Saffir-Simpson Hurricane Wind Scale. Hurricane: A tropical cyclone with maximum sustained winds of 74 mph (64 knots) or higher. Tropical Storm: A tropical cyclone with maximum sustained winds of 39 to 73 mph (34 to 63 knots).
Tropical Depression: A tropical cyclone with maximum sustained winds of 38 mph (33 knots) or less. Higher sustained winds are directly correlated to damage potential. Tropical cyclones are classified based on sustained wind speeds. Keep extra batteries handy, as well as bottled water and canned food.įor more items helpful in an emergency, check out the National Hurricane Center’s disaster supply kit checklist: įor tips on preventing damage to your home and developing a family plan: What is the difference between a tropical depression, tropical storm and hurricane? The Midland ER210 with emergency crank function keeps you alerted when the power is down. Weather Alert Radios How should I prepare for a hurricane?įor up-to-date hurricane and severe weather information, even during a power outage, listen to your NOAA Weather radio.
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