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<br />The Miami-Dade Local Mitigation Strategy <br />June2011 <br /> <br />Fujita Scale <br /> <br />A scale of tornado intensity in which wind speeds are inferred from an analysis of wind damage: <br /> <br />Ratin2 Wind, Dama2c <br />FO (weak) 40-72 moh, light damage <br />F1 (weak) 73-112 mph, moderate damage <br />F2 113-157 mph, considerable damage <br />(strong) <br />F3 158-206 mph, severe damage <br />(strong) <br />F4 (vio- 207-260 mph, devestating damage <br />lent) <br />F5 (vio- 260-318 mph (rare), incredible damage <br />lent) <br /> <br />Source: National Hurricane Center, http://www . weather.gov/ glossary/index. php?letter=f <br />(accessed January 8, 2009) <br /> <br />Palmer Drought Severity Index <br /> <br />Normal o to -0.5 <br />Incipient Drought -0.5 to -1.0 <br />Mild Drought -1.0 to -2.0 <br />Moderate Drought -2.0 to -3.0 <br />Severe Drought -3.0 to -4.0 <br />Extreme Drought > -4.0 <br /> <br />Excessive Temperatures <br /> <br />Category Heat Index Possible heat disorders for people in high risk groups <br />Extreme 1300F or higher Heat stroke or sunstroke likely. <br />Danger (540C or high- <br />er) <br />Danger 105 - 1290F Sunstroke, muscle cramps, and/or heat exhaustion likely. Heat- <br /> (41 - 54OC) stroke possible with prolonged exposure and/or physical activity. <br />Extreme 90 - 1050F Sunstroke, muscle cramps, and/or heat exhaustion possible with <br />Caution (32 - 41 oc) prolonged exposure and/or physical activity. <br />Caution 80 - 900F Fatigue possible with prolonged exposure and/or physical activity. <br />(27 - 32OC) <br /> <br />The National Weather Service Weather Forecast Office for Miami issues a wind chill advi- <br />sory when the temperature is 35 degrees Fahrenheit with associated winds of 5 miles per <br />hour lasting 3 hours. A wind chill waming is issued for wind chills 25 or lower for a mini- <br />mum of 3 hours. The County activates its cold weather shelter plan when temperatures reach <br />50 degrees Fahrenheit. <br /> <br />26 <br />