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TORNADO LIFE CYCLE - NOAA

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Steam cloud. Courtesy Jeffrey Towers.<br />

Cold Air Funnel in north Texas. <strong>NOAA</strong> Photo Library/NSSL.<br />

Cold air funnels typically occur in the spring and fall, often following a cold front when the air near the<br />

surface is stable and cloud bases are high. They are typically short-lived and weaker than funnel clouds<br />

produced by thunderstorms.<br />

Smoke near Meade, KS. Courtesy Andrew Revering.

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