558  
FNUS54 KOHX 212057  
FWFOHX  
 
FIRE WEATHER PLANNING FORECAST FOR MIDDLE TENNESSEE  
NATIONAL WEATHER SERVICE NASHVILLE TN  
257 PM CST MON JAN 21 2019  
   
DISCUSSION
 
 
AFTER A MOSTLY CLEAR COLD NIGHT AND DRY CONDITIONS, THE WEATHER  
WILL CHANGE QUITE DRAMATICALLY FOR TUESDAY WITH A WARMUP IN  
TEMPERATURES EXPECTED. SOUTHERLY WINDS WILL INCREASE AS THE MORNING  
HOURS COMMENCE WITH BREEZY SOUTH WINDS 15 TO 25 MPH WITH GUSTS 40 TO  
50 MPH EXPECTED FROM THE AFTERNOON HOURS ON TUESDAY THROUGH THE MID  
MORNING HOURS ON WEDNESDAY. INCREASING CHANCES OF SHOWERS ARE  
EXPECTED FROM THE WEST AS THE DAY PROGRESSES ON TUESDAY. MINIMUM  
AFTERNOON RELATIVE HUMIDITY VALUES ON TUESDAY WILL RANGE FROM THE MID  
30S EAST TO MID 50S WEST. SHOWERS CAN BE EXPECTED TUESDAY NIGHT INTO  
WEDNESDAY. MINIMUM AFTERNOON RELATIVE HUMIDITY VALUES ON WEDNESDAY  
WILL SPAN THE 80S. AN UNSETTLED WEATHER PATTERN WILL BE IN STORE FOR  
THE MID STATE REGION THE REMAINDER OF THE WORK WEEK INTO THE WEEKEND  
WITH A SERIES OF SYSTEMS MOVING ACROSS THE MID STATE REGION AND  
COLDER TEMPERATURES RETURNING.  
 
TNZ501-221200-  
HIGHLAND RIM DISTRICT - NORTH-  
INCLUDING THE COUNTIES OF CHEATHAM, DAVIDSON, DICKSON, HOUSTON,  
HUMPHREYS, MONTGOMERY, ROBERTSON, RUTHERFORD, STEWART, SUMNER,  
WILLIAMSON, AND WILSON  
257 PM CST MON JAN 21 2019  
 
TONIGHT TUE TUE NIGHT WED  
 
CLOUD COVER MCLEAR PCLDY CLOUDY CLOUDY  
TEMP (24H TREND) 27 (+10) 52 (+21) 47 48  
RH % (24H TREND) 59 (-25) 47 (+7) 91 80  
AM 20FT WND (MPH) S 12-16 G25 W 12-16  
PM 20FT WND (MPH) E 4-8 S 14-18 G26 S 15-19 G28 NW 7-11  
PRECIP CHANCE (%) 0 10 80 90  
PRECIP TYPE NONE NONE SHOWERS FRZ RAIN  
PRECIP AMOUNT (IN) 0.00 0.00 0.35 1.11  
PRECIP DUR (HR) 0 7 12  
PRECIP BEGIN 6 PM CONTINUING  
PRECIP END CONTINUING CONTINUING  
MIXING HGT (M-MSL) 900 600  
MIXING HGT (FT-MSL) 3100 2000  
TRANSPORT WND (M/S) S 17 NW 7  
TRANSPORT WND (MPH) S 38 NW 16  
DISPERSION INDEX 1 36 9 14  
LAL 1 1 1 1  
HAINES INDEX 2 3 2 2  
MAXIMUM LVORI 0 0 0 0  
RH RECOVERY POOR EXCELLENT  
 
REMARKS...NONE.  
   
FORECAST FOR DAYS 3 THROUGH 7
 
 
   
WEDNESDAY NIGHT
 
LIGHT FREEZING RAIN, SHOWERS LIKELY AND A CHANCE  
OF SNOW SHOWERS. LOWS IN THE MID 20S. NORTHWEST WINDS 5 TO 10 MPH.  
CHANCE OF PRECIPITATION 70 PERCENT.    
THURSDAY
 
PARTLY SUNNY. HIGHS AROUND 40. MINIMUM RH 53 PERCENT.  
NORTHWEST WINDS UP TO 5 MPH.    
THURSDAY NIGHT
 
MOSTLY CLEAR. LOWS AROUND 19. NORTHWEST WINDS UP  
TO 5 MPH.    
FRIDAY
 
MOSTLY SUNNY. COLDER. HIGHS AROUND 30. MINIMUM RH  
42 PERCENT. NORTHWEST WINDS UP TO 5 MPH.    
SATURDAY
 
PARTLY CLOUDY. LOWS IN THE LOWER 20S. HIGHS AROUND 40.  
MINIMUM RH 57 PERCENT. SOUTHWEST WINDS UP TO 10 MPH.    
SUNDAY
 
MOSTLY CLOUDY WITH A 40 PERCENT CHANCE OF SNOW SHOWERS.  
LOWS IN THE MID 20S. HIGHS IN THE UPPER 30S. MINIMUM RH 70 PERCENT.  
NORTH WINDS UP TO 5 MPH.    
MONDAY
 
PARTLY CLOUDY. LOWS IN THE MID 20S. HIGHS IN THE LOWER  
40S. MINIMUM RH 71 PERCENT. SOUTHWEST WINDS UP TO 10 MPH.  
 

 
 
TNZ502-221200-  
HIGHLAND RIM DISTRICT - SOUTH-  
INCLUDING THE COUNTIES OF BEDFORD, GILES, HARDIN, HICKMAN, LAWRENCE,  
LEWIS, LINCOLN, MARSHALL, MAURY, MOORE, PERRY, AND WAYNE  
257 PM CST MON JAN 21 2019  
 
TONIGHT TUE TUE NIGHT WED  
 
CLOUD COVER MCLEAR PCLDY MCLDY CLOUDY  
TEMP (24H TREND) 28 (+9) 51 (+17) 46 50  
RH % (24H TREND) 60 (-20) 50 (+14) 95 82  
AM 20FT WND (MPH) S 12-16 G23 SW 12-16 G23  
PM 20FT WND (MPH) SE 4-8 S 12-16 G25 S 15-19 G28 NW 7-11  
PRECIP CHANCE (%) 0 10 80 100  
PRECIP TYPE NONE NONE SHOWERS SHOWERS  
PRECIP AMOUNT (IN) 0.00 0.00 0.29 1.23  
PRECIP DUR (HR) 0 7 12  
PRECIP BEGIN 6 PM CONTINUING  
PRECIP END CONTINUING CONTINUING  
MIXING HGT (M-MSL) 1000 600  
MIXING HGT (FT-MSL) 3400 1900  
TRANSPORT WND (M/S) S 17 NW 7  
TRANSPORT WND (MPH) S 38 NW 15  
DISPERSION INDEX 2 38 11 14  
LAL 1 1 1 1  
HAINES INDEX 2 3 2 2  
MAXIMUM LVORI 0 0 0 0  
RH RECOVERY POOR EXCELLENT  
 
REMARKS...NONE.  
   
FORECAST FOR DAYS 3 THROUGH 7
 
 
   
WEDNESDAY NIGHT
 
SHOWERS LIKELY AND A CHANCE OF LIGHT FREEZING  
RAIN. LOWS IN THE MID 20S. NORTHWEST WINDS 5 TO 10 MPH. CHANCE OF  
PRECIPITATION 70 PERCENT.    
THURSDAY
 
MOSTLY SUNNY. HIGHS IN THE LOWER 40S. MINIMUM RH  
51 PERCENT. NORTHWEST WINDS UP TO 5 MPH.    
THURSDAY NIGHT
 
MOSTLY CLEAR. LOWS IN THE LOWER 20S. NORTHWEST  
WINDS UP TO 5 MPH.    
FRIDAY
 
PARTLY SUNNY. HIGHS IN THE LOWER 30S. MINIMUM RH  
42 PERCENT. NORTHWEST WINDS UP TO 5 MPH.    
SATURDAY
 
PARTLY CLOUDY. LOWS IN THE LOWER 20S. HIGHS IN THE LOWER  
40S. MINIMUM RH 55 PERCENT. SOUTHWEST WINDS UP TO 5 MPH.    
SUNDAY
 
MOSTLY CLOUDY WITH A 40 PERCENT CHANCE OF SNOW SHOWERS AND  
SHOWERS. LOWS IN THE UPPER 20S. HIGHS AROUND 40. MINIMUM RH  
69 PERCENT. NORTH WINDS UP TO 5 MPH.    
MONDAY
 
PARTLY CLOUDY. LOWS IN THE MID 20S. HIGHS IN THE MID 40S.  
MINIMUM RH 68 PERCENT. WEST WINDS UP TO 5 MPH.  
 

 
 
TNZ400-221200-  
CUMBERLAND DISTRICT - NORTH-  
INCLUDING THE COUNTIES OF CANNON, CLAY, CUMBERLAND, DEKALB,  
FENTRESS, JACKSON, MACON, OVERTON, PICKETT, PUTNAM, SMITH,  
TROUSDALE, WARREN, AND WHITE  
257 PM CST MON JAN 21 2019  
 
TONIGHT TUE TUE NIGHT WED  
 
CLOUD COVER MCLEAR MCLEAR MCLDY CLOUDY  
TEMP (24H TREND) 24 (+9) 49 (+20) 43 50  
RH % (24H TREND) 52 (-19) 34 (+1) 89 80  
AM 20FT WND (MPH) S 11-15 G23 S 16-20 G26  
PM 20FT WND (MPH) E 4-8 S 12-16 G23 S 16-20 G28 W 12-16  
PRECIP CHANCE (%) 0 0 40 100  
PRECIP TYPE NONE NONE SHOWERS SHOWERS  
PRECIP AMOUNT (IN) 0.00 0.00 0.09 0.97  
PRECIP DUR (HR) 2 12  
PRECIP BEGIN 6 PM CONTINUING  
PRECIP END CONTINUING CONTINUING  
MIXING HGT (M-MSL) 900 400  
MIXING HGT (FT-MSL) 3100 1300  
TRANSPORT WND (M/S) S 15 W 7  
TRANSPORT WND (MPH) S 35 W 15  
DISPERSION INDEX 1 46 7 11  
LAL 1 1 1 1  
HAINES INDEX 2 3 2 2  
MAXIMUM LVORI 0 0 0 0  
RH RECOVERY POOR GOOD  
 
REMARKS...NONE.  
   
FORECAST FOR DAYS 3 THROUGH 7
 
 
   
WEDNESDAY NIGHT
 
SHOWERS, A CHANCE OF LIGHT FREEZING RAIN AND SNOW  
SHOWERS. LOWS IN THE UPPER 20S. NORTHWEST WINDS 5 TO 10 MPH. CHANCE  
OF PRECIPITATION NEAR 100 PERCENT.    
THURSDAY
 
MOSTLY CLOUDY WITH A 20 PERCENT CHANCE OF SNOW SHOWERS.  
HIGHS IN THE UPPER 30S. MINIMUM RH 58 PERCENT. NORTHWEST WINDS UP TO  
5 MPH.    
THURSDAY NIGHT
 
PARTLY CLOUDY. LOWS AROUND 20. NORTHWEST WINDS UP  
TO 5 MPH.    
FRIDAY
 
PARTLY SUNNY. HIGHS AROUND 30. MINIMUM RH 46 PERCENT.  
NORTHWEST WINDS UP TO 5 MPH.    
SATURDAY
 
PARTLY CLOUDY. LOWS AROUND 20. HIGHS IN THE UPPER 30S.  
MINIMUM RH 50 PERCENT. SOUTHWEST WINDS UP TO 5 MPH.    
SUNDAY
 
MOSTLY CLOUDY WITH A 40 PERCENT CHANCE OF SNOW SHOWERS AND  
SHOWERS. LOWS IN THE UPPER 20S. HIGHS IN THE UPPER 30S. MINIMUM RH  
70 PERCENT. NORTHWEST WINDS UP TO 5 MPH.    
MONDAY
 
PARTLY CLOUDY. LOWS IN THE MID 20S. HIGHS IN THE LOWER  
40S. MINIMUM RH 76 PERCENT. WEST WINDS UP TO 5 MPH.  
 

 
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