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October 2012 Texas GIS Forum Mapping Weather: Flooding

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Severe Weather (1980-2005) Blue (4515) Damaging Winds Green (5636) Large Hail Red (1017) Tornado Tracks

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June & Nov 2004 July 2002 July 2007 Sept 2010

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“Flash Flood Alley”

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1869 Austin

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1869 La Grange

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1890s McDonald Dam

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1900 McDonald Dam 1 hr after break

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After the 1900 flood

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1906 Soldiers at Austin Dam

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1912 New Austin Dam

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Congress Bridge - April 23, 1915

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1915 Austin Dam after flood

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In 1921… Worst flood by death toll: 215 killed 38.2” Thrall in 24 hours

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1935 flood Austin Dam

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1935 Austin flood

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1935 Flood

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1935 flood at Austin Dam

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1935 Austin flood

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1935 Austin after flood

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1936 Austin flood

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1936 Austin flood

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1938 Lake Buchanan

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1938 flood Buchanan Dam

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The Highland Lakes System

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1957 Mansfield Dam

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Taken from: NWS report, Rainfall & Floods of April, May & June 1957 in the South Central United States, US Weather Bureau, 1958.

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1957 Mansfield Dam

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1957 Mansfield Dam

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June & Nov 2004 July 2002 July 2007 Sept 2010 El Niño La Niña

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2007 Mansfield Dam

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2007 Flash flooding

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May 3, 1999 – Moore Tornado

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Global SST Departures (oC)

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NE Austin EF1 – January 25, 2012

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Thank you! Burton Fitzsimmons Chief Meteorologist, YNN Austin [email protected]