989  
NOUS44 KOHX 140955  
PNSOHX  
TNZ005>011-023>034-056>066-075-077>080-093>095-150000-  
 
PUBLIC INFORMATION STATEMENT  
NATIONAL WEATHER SERVICE NASHVILLE TN  
455 AM CDT SAT OCT 14 2017  
   
..FIRE WEATHER/FIRE PREVENTION AWARENESS WEEK CONCLUDES TODAY
 
 
FIRE WEATHER/FIRE PREVENTION AWARENESS WEEK CONCLUDES TODAY WITH A  
LOOK AT OUR SPRING AND FALL FIRE WEATHER SEASONS.  
 
AS MENTIONED PREVIOUSLY, LOW RELATIVE HUMIDITIES AND HIGH WIND  
SPEEDS ARE TWO KEY INGREDIENTS WHICH ACT TO INCREASE THE DEGREE OF  
FIRE DANGER. THESE TWO WEATHER INGREDIENTS COMBINED WITH DRIER  
VEGETATION ARE MOST PREVALENT DURING THE SPRING AND FALL FIRE  
WEATHER SEASONS.  
 
THE FALL FIRE WEATHER SEASON GENERALLY RUNS FROM OCTOBER 1ST UNTIL  
DECEMBER 1ST. CLIMATOLOGICALLY FOR TENNESSEE, THE MONTHS THAT LEAD  
INTO THE FALL SEASON, SEPTEMBER AND OCTOBER, ARE GENERALLY THE  
DRIEST MONTHS OF THE YEAR. DURING THIS TIME OF YEAR, TEMPERATURES  
ARE COOLING OFF. THIS SERVES TO REDUCE THE THREAT OF HEAVIER SHOWERS  
AND THUNDERSTORMS WHICH ARE USUALLY DRIVEN BY WARMER SURFACE  
TEMPERATURES. ALSO, THE JET STREAM, WHERE THE BETTER ORGANIZED  
WEATHER SYSTEMS RESIDE, IS LOCATED WELL NORTH OF TENNESSEE.  
 
TYPICALLY, IN THE MONTH OF SEPTEMBER, THE VEGETATION BEGINS TO DRY  
OUT. BY OCTOBER, A COMBINATION OF DRIER VEGETATION AND THE END OF  
THE GROWING SEASON COULD LEAD TO AN EXTENDED PERIOD OF HIGHER FIRE  
DANGER.  
 
CLIMATOLOGICAL RECORDS FOR NASHVILLE INDICATE THAT THE DRIEST MONTHS  
OF THE YEAR GENERALLY OCCURRED IN SEPTEMBER AND OCTOBER. IN FACT,  
RECORDS INDICATE THAT AN AVERAGE OF ONLY 0.20 INCHES OR LESS OF RAIN  
FELL DURING THESE RECORD BREAKING MONTHS.  
 
THE SPRING FIRE WEATHER SEASON ACTUALLY BEGINS IN LATE WINTER. IT  
GENERALLY BEGINS ON FEBRUARY 15TH AND LASTS UNTIL MAY 1ST. AS WE GET  
INTO LATE FEBRUARY AND MARCH, MOST OF THE VEGETATION IS STILL  
DORMANT AND TEMPERATURES ARE BEGINNING TO WARM. THE WARMER  
TEMPERATURES SERVE TO INCREASE THE SURFACE EVAPORATION RATE THEREBY  
KEEPING THE VEGETATION RATHER DRY. FURTHERMORE, IT IS NOW CLOSE TO  
KITE FLYING WEATHER AND SOON THE MARCH WINDS WILL BEGIN TO BLOW.  
WITH THESE INGREDIENTS IN PLACE, ELEVATED LEVELS OF FIRE DANGER CAN  
OCCUR.  
 
IN CONCLUSION, THOUGH WE HAVE DISCUSSED THE SEASONAL IMPACTS OF  
WEATHER ON FIRES, KEEP IN MIND THAT FIRES CAN OCCUR AT ANY TIME OF  
THE YEAR. WE SHOULD ALWAYS STRIVE TO STAY EDUCATED. BUT MOST  
IMPORTANTLY, BE CAREFUL AND PLAY BY THE RULES.  
 
FOR ADDITIONAL FIRE WEATHER INFORMATION, PLEASE GO TO THE FOLLOWING  
WEBSITE: WWW.WEATHER.GOV/OHX/FIREWEATHER  
 

 
 
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