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Severe storms occur in low-pressure weather systems when warm, moist air rises into the atmosphere, cooling and condensing to form clouds and precipitation. Three key conditions are needed for thunderstorms: moist air, an intense heat source lifting the air or an approaching cold front, and warm rising air that stays warmer than the surrounding air. When these conditions exist, moisture condenses as the air rises, clouds form, and thunderstorms develop as one of the most common forms of extreme weather.
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Weather refers to the current state of the atmosphere regarding elements like temperature, wind, and moisture. Various factors influence weather, including the sun heating the air and evaporating water from surfaces, which forms clouds and can lead to precipitation when the water condenses. Weather patterns result from the movement of air masses with different properties interacting, such as cold fronts where colder air advances under warmer air. Meteorologists study weather to make forecasts by analyzing weather maps, temperature and pressure readings, and storm conditions.
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stratus clouds and fog. 52. "Drag and drop" (insert) matching graphic on the SRS. More often
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Context clues
- 1. Severe storms happen in low-pressure weather systems. Warm, wet air begins rising into the air. The higher it rises, the cooler it becomes. Water vapor in the air forms drops, a process called condensation. The drops join together to form clouds, and then precipitation of some kind (rain, sleet, snow, or hail) will fall down to Earth’s surface. Although conditions mustbe very specific for a thunderstorm to develop, thunderstormsremain the most commonkind of extreme weather. Before a thunderstormcan develop, there have to be three conditions present: the air has to be full of moisture, there must be either an intensely heated portion of Earth’s surfacesending warm air up quickly or an approaching cold front, and the warm air that is rising must be warm enough to stay warmer than the air it passes through as it rises. The moisturein the rising air condenses,clouds form and a storm begins.