913  
FNUS74 KOHX 310619  
FWSOHX  
 
SPOT FORECAST FOR STRI MCFADDEN...NATIONAL PARK SERVICE  
NATIONAL WEATHER SERVICE NASHVILLE TN  
1219 AM CST WED JAN 31 2018  
 
FORECAST IS BASED ON IGNITION TIME OF 2156 CST ON JANUARY 30.  
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
 
LOW RELATIVE HUMIDITY AND STRONG SOUTHERLY WINDS WILL LEAD TO  
ELEVATED FIRE DANGER THIS AFTERNOON. MINIMUM RH VALUES WILL BE  
NEAR 30% WITH GUSTS UP TO 30 MPH POSSIBLE. WINDS WILL NOT DECREASE  
MUCH OVERNIGHT WITH GUSTS UP TO 25 MPH STILL POSSIBLE. SHOWERS  
WILL BEGIN TO IMPACT THE SITE BY MID MORNING AND WILL LAST THROUGH  
THURSDAY.  
   
TODAY
 
 
MAX TEMPERATURE.....AROUND 57.  
LAL.................NO TSTMS.  
MIN HUMIDITY........29 PERCENT.  
 
TIME (CST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........MCR CLR CLR CLR CLR CLR CLR CLR CLR CLR CLR CLR  
WEATHER COV.....  
WEATHER TYPE....  
TEMP............26 30 35 40 44 48 52 54 56 56 55 54  
RH..............82 69 59 50 43 38 33 31 29 30 31 33  
20FT WIND DIR...S S S S S S S S S S S S  
20FT WIND SPD...6 7 9 10 12 12 12 13 13 13 12 10  
20FT WIND GUST..13 16 20 23 25 25 25 26 26 26 25 23  
MIX HGT (KFT)...0.5 0.8 1.2 1.5 1.9 2.2 2.4 2.6 2.7 2.5 1.8 1.1  
MIX HGT (KM)....0.2 0.2 0.4 0.5 0.6 0.7 0.7 0.8 0.8 0.8 0.5 0.3  
TRANSP WIND DIR.S S S S S S SW SW S S S S  
TRANSP WIND SPD.15 18 22 24 25 26 26 29 30 30 25 18  
TRANS SPD (M/S).7 8 10 11 11 12 12 13 13 13 11 8  
DISPERSION IDX..7 14 25 37 48 57 63 74 81 74 46 19  
LVORI...........0 0 0 0 0 0 0 0 0 0 0 0  
LAL.............1 1 1 1 1 1 1 1 1 1 1 1  
   
TONIGHT
 
 
MIN TEMPERATURE.....AROUND 43.  
LAL.................NO TSTMS.  
MAX HUMIDITY........79 PERCENT.  
 
TIME (CST) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM  
SKY (%).........CLEAR CLEAR CLEAR MCLEAR PCLDY MCLDY  
WEATHER COV.....  
WEATHER TYPE....NONE NONE NONE NONE NONE NONE  
TEMP............52 50 48 47 46 45  
RH..............36 42 47 54 63 74  
20FT WIND DIR...S S S S S S  
20FT WIND SPD...9 9 9 9 8 8  
20FT WIND GUST..21 21 21 20 17 17  
MIX HGT (FT)....400 300 400 400 500 700  
MIX HGT (M).....120 90 120 120 150 210  
TRANSP WIND DIR.S S S SW SW SW  
TRANSP WIND SPD.13 10 14 18 18 18  
TRANS SPD (M/S).6 4 6 8 8 8  
DISPERSION IDX..5 3 6 8 9 12  
LVORI...........0 0 0 0 0 0  
LAL.............1 1 1 1 1 1  
   
THURSDAY
 
 
MAX TEMPERATURE.....AROUND 56.  
LAL.................NO TSTMS.  
MIN HUMIDITY........67 PERCENT.  
 
TIME (CST) 6 AM 9 AM NOON 3 PM  
SKY (%).........MCLDY CLOUDY CLOUDY CLOUDY  
WEATHER COV.....CHANCE CHANCE DEFNTE DEFNTE  
WEATHER TYPE....RAIN RAIN RAIN RAIN  
TEMP............44 47 53 54  
RH..............85 87 75 68  
20FT WIND DIR...SW SW SW W  
20FT WIND SPD...7 8 7 5  
20FT WIND GUST..16 17 14 10  
MIX HGT (FT)....1000 1500 1100 1400  
MIX HGT (M).....300 460 340 430  
TRANSP WIND DIR.SW SW SW NW  
TRANSP WIND SPD.18 21 14 15  
TRANS SPD (M/S).8 9 6 7  
DISPERSION IDX..18 30 16 21  
LVORI...........0 0 0 0  
LAL.............1 1 1 1  
 

 
FORECASTER...MATT REAGAN  
REQUESTED BY...ROBERT VICK  
TYPE OF REQUEST...PRESCRIBED  
.TAG 1801246.0/OHX  
 
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