192  
FNUS54 KOHX 230934  
FWFOHX  
 
FIRE WEATHER PLANNING FORECAST FOR MIDDLE TENNESSEE  
NATIONAL WEATHER SERVICE NASHVILLE TN  
434 AM CDT WED MAY 23 2018  
   
DISCUSSION
 
 
LESS IN THE WAY OF RAINFALL IS EXPECTED TODAY THROUGH THURSDAY AS  
UPPER RIDGING BUILDS BACK ACROSS THE AREA. SURFACE HIGH TO OUR NORTH  
WILL BRING DRIER AIR INTO THE LOWER LEVELS. AS A RESULT, LOOK FOR RH  
VALUES TO COME DOWN, BUT WIND SPEEDS WILL REMAIN WELL BELOW MARGINAL  
FIRE DANGER LEVELS.  
 
IN THE EXTENDED FORECAST, UPPER RIDGE WILL GIVE WAY AS UPPER  
TROUGHING REESTABLISHES ITSELF OVER THE DEEP AND MID SOUTH. WITHIN  
THE TROUGH, AN UPPER LEVEL LOW WILL ATTEMPT TO CLOSE OFF AS IT MOVES  
SLOWLY NORTHWARD. RAIN CHANCES WILL PICK UP ONCE AGAIN, ALTHOUGH  
RAINFALL TOTALS WILL BE SOMEWHAT MODEST.  
 
TNZ501-241200-  
HIGHLAND RIM DISTRICT - NORTH-  
INCLUDING THE COUNTIES OF CHEATHAM, DAVIDSON, DICKSON, HOUSTON,  
HUMPHREYS, MONTGOMERY, ROBERTSON, RUTHERFORD, STEWART, SUMNER,  
WILLIAMSON, AND WILSON  
434 AM CDT WED MAY 23 2018  
 
TODAY TONIGHT THU  
 
CLOUD COVER PCLDY MCLEAR MCLEAR  
TEMP (24H TREND) 86 (+2) 64 (-1) 88  
RH % (24H TREND) 51 (-9) 94 (-4) 48  
AM 20FT WND (MPH) LGT/VAR LGT/VAR  
PM 20FT WND (MPH) N 4-8 NE 4-8 NE 3-7  
PRECIP CHANCE (%) 10 10 10  
PRECIP TYPE NONE NONE NONE  
PRECIP AMOUNT (IN) 0.00 0.00 0.00  
PRECIP DUR (HR) 0 0 0  
PRECIP BEGIN  
PRECIP END  
MIXING HGT (M-MSL) 2300 2200  
MIXING HGT (FT-MSL) 7500 7400  
TRANSPORT WND (M/S) N 4 NE 4  
TRANSPORT WND (MPH) N 9 NE 8  
DISPERSION INDEX 27 3 26  
LAL 1 1 1  
HAINES INDEX 3 3 4  
MAXIMUM LVORI 10 1 2  
RH RECOVERY EXCELLENT  
 
REMARKS...NONE.  
   
FORECAST FOR DAYS 3 THROUGH 7
 
 
   
THURSDAY NIGHT
 
MOSTLY CLEAR. LOWS IN THE MID 60S. EAST WINDS UP  
TO 5 MPH.    
FRIDAY
 
PARTLY SUNNY WITH A 20 PERCENT CHANCE OF SHOWERS AND  
THUNDERSTORMS. HIGHS IN THE MID 80S. MINIMUM RH 60 PERCENT. SOUTH  
WINDS UP TO 5 MPH.    
FRIDAY NIGHT
 
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS AND A SLIGHT  
CHANCE OF THUNDERSTORMS. LOWS IN THE UPPER 60S. SOUTH WINDS UP TO  
5 MPH. CHANCE OF PRECIPITATION 40 PERCENT.    
SATURDAY
 
SHOWERS LIKELY AND A SLIGHT CHANCE OF THUNDERSTORMS.  
HIGHS IN THE MID 80S. MINIMUM RH 64 PERCENT. SOUTH WINDS UP TO  
5 MPH. CHANCE OF PRECIPITATION 70 PERCENT.    
SUNDAY
 
SHOWERS AND THUNDERSTORMS LIKELY. LOWS IN THE UPPER 60S.  
HIGHS IN THE LOWER 80S. MINIMUM RH 69 PERCENT. SOUTHEAST WINDS UP TO  
5 MPH. CHANCE OF PRECIPITATION 70 PERCENT.    
MEMORIAL DAY
 
SHOWERS AND THUNDERSTORMS LIKELY. LOWS IN THE UPPER  
60S. HIGHS IN THE LOWER 80S. MINIMUM RH 68 PERCENT. NORTHEAST WINDS  
UP TO 5 MPH. CHANCE OF PRECIPITATION 70 PERCENT.    
TUESDAY
 
SHOWERS AND THUNDERSTORMS LIKELY. LOWS IN THE UPPER 60S.  
HIGHS IN THE MID 80S. MINIMUM RH 66 PERCENT. NORTHEAST WINDS UP TO  
5 MPH. CHANCE OF PRECIPITATION 70 PERCENT.  
 

 
 
TNZ502-241200-  
HIGHLAND RIM DISTRICT - SOUTH-  
INCLUDING THE COUNTIES OF BEDFORD, GILES, HARDIN, HICKMAN, LAWRENCE,  
LEWIS, LINCOLN, MARSHALL, MAURY, MOORE, PERRY, AND WAYNE  
434 AM CDT WED MAY 23 2018  
 
TODAY TONIGHT THU  
 
CLOUD COVER PCLDY PCLDY PCLDY  
TEMP (24H TREND) 87 (+3) 66 (0) 89  
RH % (24H TREND) 54 (-3) 94 (-2) 46  
AM 20FT WND (MPH) LGT/VAR LGT/VAR  
PM 20FT WND (MPH) N 3-7 LGT/VAR LGT/VAR  
PRECIP CHANCE (%) 10 10 10  
PRECIP TYPE TSTMS NONE TSTMS  
PRECIP AMOUNT (IN) 0.01 0.00 0.00  
PRECIP DUR (HR) 1 0 1  
PRECIP BEGIN 1 PM CONTINUING 7 AM  
PRECIP END CONTINUING 7 PM CONTINUING  
MIXING HGT (M-MSL) 2500 2400  
MIXING HGT (FT-MSL) 8100 7800  
TRANSPORT WND (M/S) NE 4 NE 2  
TRANSPORT WND (MPH) NE 8 NE 5  
DISPERSION INDEX 27 1 18  
LAL 1 1 1  
HAINES INDEX 2 3 3  
MAXIMUM LVORI 10 2 2  
RH RECOVERY EXCELLENT  
 
REMARKS...NONE.  
   
FORECAST FOR DAYS 3 THROUGH 7
 
 
   
THURSDAY NIGHT
 
PARTLY CLOUDY. LOWS IN THE UPPER 60S. EAST WINDS  
UP TO 5 MPH.    
FRIDAY
 
MOSTLY CLOUDY WITH A 50 PERCENT CHANCE OF SHOWERS AND  
THUNDERSTORMS. HIGHS IN THE MID 80S. MINIMUM RH 61 PERCENT. SOUTH  
WINDS UP TO 5 MPH.    
FRIDAY NIGHT
 
MOSTLY CLOUDY WITH A 50 PERCENT CHANCE OF SHOWERS  
AND THUNDERSTORMS. LOWS IN THE UPPER 60S. SOUTHEAST WINDS UP TO  
5 MPH.    
SATURDAY
 
SHOWERS AND THUNDERSTORMS LIKELY. HIGHS IN THE MID 80S.  
MINIMUM RH 65 PERCENT. SOUTH WINDS UP TO 5 MPH. CHANCE OF  
PRECIPITATION 60 PERCENT.    
SUNDAY
 
SHOWERS AND THUNDERSTORMS LIKELY. LOWS IN THE UPPER 60S.  
HIGHS IN THE LOWER 80S. MINIMUM RH 70 PERCENT. SOUTHEAST WINDS UP TO  
5 MPH. CHANCE OF PRECIPITATION 60 PERCENT.    
MEMORIAL DAY
 
SHOWERS AND THUNDERSTORMS LIKELY. LOWS IN THE UPPER  
60S. HIGHS IN THE LOWER 80S. MINIMUM RH 69 PERCENT. EAST WINDS UP TO  
5 MPH. CHANCE OF PRECIPITATION 70 PERCENT.    
TUESDAY
 
MOSTLY CLOUDY WITH SHOWERS AND THUNDERSTORMS LIKELY. LOWS  
IN THE MID 60S. HIGHS IN THE MID 80S. MINIMUM RH 65 PERCENT.  
NORTHEAST WINDS UP TO 5 MPH. CHANCE OF PRECIPITATION 70 PERCENT.  
 

 
 
TNZ400-241200-  
CUMBERLAND DISTRICT - NORTH-  
INCLUDING THE COUNTIES OF CANNON, CLAY, CUMBERLAND, DEKALB,  
FENTRESS, JACKSON, MACON, OVERTON, PICKETT, PUTNAM, SMITH,  
TROUSDALE, WARREN, AND WHITE  
434 AM CDT WED MAY 23 2018  
 
TODAY TONIGHT THU  
 
CLOUD COVER PCLDY PCLDY MCLEAR  
TEMP (24H TREND) 84 (+4) 64 (0) 86  
RH % (24H TREND) 57 (-7) 92 (-5) 51  
AM 20FT WND (MPH) LGT/VAR LGT/VAR  
PM 20FT WND (MPH) N 3-7 LGT/VAR LGT/VAR  
PRECIP CHANCE (%) 10 10 10  
PRECIP TYPE TSTMS NONE NONE  
PRECIP AMOUNT (IN) 0.01 0.00 0.00  
PRECIP DUR (HR) 1 0 1  
PRECIP BEGIN 7 AM CONTINUING 1 PM  
PRECIP END CONTINUING 7 PM CONTINUING  
MIXING HGT (M-MSL) 2200 2600  
MIXING HGT (FT-MSL) 7200 8600  
TRANSPORT WND (M/S) N 4 E 2  
TRANSPORT WND (MPH) N 9 E 3  
DISPERSION INDEX 29 2 15  
LAL 1 1 1  
HAINES INDEX 3 3 4  
MAXIMUM LVORI 10 2 2  
RH RECOVERY EXCELLENT  
 
REMARKS...NONE.  
   
FORECAST FOR DAYS 3 THROUGH 7
 
 
   
THURSDAY NIGHT
 
PARTLY CLOUDY. LOWS IN THE MID 60S. SOUTHEAST  
WINDS UP TO 5 MPH.    
FRIDAY
 
MOSTLY CLOUDY WITH A 40 PERCENT CHANCE OF SHOWERS AND  
THUNDERSTORMS. HIGHS IN THE LOWER 80S. MINIMUM RH 63 PERCENT. SOUTH  
WINDS UP TO 5 MPH.    
FRIDAY NIGHT
 
CLOUDY WITH A 50 PERCENT CHANCE OF SHOWERS AND  
THUNDERSTORMS. LOWS IN THE MID 60S. SOUTH WINDS UP TO 5 MPH.    
SATURDAY
 
SHOWERS AND THUNDERSTORMS LIKELY. HIGHS IN THE LOWER  
80S. MINIMUM RH 64 PERCENT. SOUTH WINDS UP TO 5 MPH. CHANCE OF  
PRECIPITATION 70 PERCENT.    
SUNDAY
 
SHOWERS AND THUNDERSTORMS LIKELY. LOWS IN THE MID 60S.  
HIGHS IN THE LOWER 80S. MINIMUM RH 67 PERCENT. SOUTHEAST WINDS UP TO  
5 MPH. CHANCE OF PRECIPITATION 70 PERCENT.    
MEMORIAL DAY
 
SHOWERS AND THUNDERSTORMS LIKELY. LOWS IN THE MID  
60S. HIGHS IN THE LOWER 80S. MINIMUM RH 68 PERCENT. EAST WINDS UP TO  
5 MPH. CHANCE OF PRECIPITATION 70 PERCENT.    
TUESDAY
 
SHOWERS AND THUNDERSTORMS LIKELY. LOWS IN THE MID 60S.  
HIGHS IN THE LOWER 80S. MINIMUM RH 65 PERCENT. EAST WINDS UP TO  
5 MPH. CHANCE OF PRECIPITATION 70 PERCENT.  
 

 
 
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