323  
FNUS74 KFWD 171110  
FWSFWD  
 
SPOT FORECAST FOR LBJ FY 19 RX BURNS...CADDO-LBJ NATIONAL GRASSLANDS  
NATIONAL WEATHER SERVICE FORT WORTH TX  
510 AM CST SUN FEB 17 2019  
 
FORECAST IS BASED ON IGNITION TIME OF 1100 CST ON FEBRUARY 17.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
 
A RELATIVELY COOL DAY IS IN STORE TODAY WITH NORTHERLY WINDS IN  
PLACE. BREEZY CONDITIONS THE FIRST HALF OF THE DAY WILL GIVE WAY  
TO LOWER WIND SPEEDS THIS AFTERNOON. SOME SUN WILL BE POSSIBLE,  
BUT ONCE AGAIN, WITH NORTHERLY WINDS, TEMPERATURES WILL STRUGGLE  
TO GET OUT OF THE LOWER 50S.  
 
MINIMUM RELATIVE HUMIDITY VALUES TODAY WILL BE IN THE MIDDLE 30%,  
WITH SLIGHTLY HIGHER HUMIDITY VALUES FOR TOMORROW.  
 
   
REST OF TODAY
 
 
SKY/WEATHER.........MOSTLY SUNNY (35-45 PERCENT).  
MAX TEMPERATURE.....AROUND 52.  
MIN HUMIDITY........35 PERCENT.  
WIND (20 FT)........NORTH WINDS 6 TO 10 MPH.  
MIXING HEIGHT.......2100-3700 FT AGL.  
TRANSPORT WINDS.....NORTH 13 TO 21 MPH.  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
EYE LEVEL WINDS.....NORTH WINDS UP TO 5 MPH.  
 
TIME (CST) 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........45 48 44 42 36 37 33  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
TEMP............42 47 49 51 52 52 52  
RH..............60 47 44 39 38 36 35  
20 FT WIND DIR..N N N N N N NE  
20 FT WIND SPD..10 10 10 9 8 8 6  
20 FT WIND GUST.14 14 14 14 12  
EYE LVL WND DIR.N N N N N N NE  
EYE LVL WND SPD.5 5 5 5 4 4 3  
EYE LVL WND GST.7 7 7 7 6  
MIX HGT (KFT)...2.1 3.0 3.3 3.5 3.7 3.7 3.7  
TRANSP WIND DIR.N N N N N N N  
TRANSP WIND SPD.21 20 17 17 15 13 14  
HAINES INDEX....4 4 4 4 4 4 4  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR (20-30 PERCENT).  
MIN TEMPERATURE.....AROUND 29.  
MAX HUMIDITY........69 PERCENT.  
WIND (20 FT)........NORTHEAST WINDS 5 TO 8 MPH.  
MIXING HEIGHT.......400-900 FT AGL.  
TRANSPORT WINDS.....NORTHEAST 9 TO 18 MPH.  
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
EYE LEVEL WINDS.....NORTHEAST WINDS UP TO 4 MPH.  
 
TIME (CST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM  
SKY (%).........41 36 31 32 26 21 13 11 9 8 23 38  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
TEMP............49 45 43 42 40 40 38 37 34 33 32 30  
RH..............40 49 53 55 59 57 62 61 66 69 66 69  
20 FT WIND DIR..NE NE NE NE NE NE NE NE NE NE NE NE  
20 FT WIND SPD..5 5 6 6 7 7 7 8 8 8 8 8  
20 FT WIND GUST. 12 12  
EYE LVL WND DIR.NE NE NE NE NE NE NE NE NE NE NE NE  
EYE LVL WND SPD.3 3 3 3 3 3 3 4 4 4 4 4  
EYE LVL WND GST. 6 6  
MIX HGT (KFT)...0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.7 0.9  
TRANSP WIND DIR.NE N NE NE NE NE NE NE NE NE NE NE  
TRANSP WIND SPD.9 9 10 13 14 15 16 16 18 15 14 16  
HAINES INDEX....5 5 5 5 5 5 5 5 5 5 5 5  
   
WASHINGTONS BIRTHDAY
 
 
SKY/WEATHER.........PARTLY SUNNY (60-70 PERCENT).  
MAX TEMPERATURE.....AROUND 44.  
MIN HUMIDITY........45 PERCENT.  
WIND (20 FT)........NORTHEAST WINDS 7 TO 9 MPH.  
MIXING HEIGHT.......900-2400 FT AGL INCREASING TO 2000-3000 FT AGL  
IN THE AFTERNOON.  
TRANSPORT WINDS.....EAST 15 TO 21 MPH.  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
EYE LEVEL WINDS.....NORTHEAST WINDS UP TO 5 MPH.  
 
TIME (CST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........53 60 66 73 66 60 53 55 58 60 60 60  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
TEMP............30 29 29 30 33 35 39 41 43 44 44 44  
RH..............69 69 69 66 58 56 50 48 45 45 45 47  
20 FT WIND DIR..NE NE NE NE NE NE NE NE NE NE NE NE  
20 FT WIND SPD..8 9 9 9 9 8 8 8 8 8 8 7  
20 FT WIND GUST. 10 10 10 10  
EYE LVL WND DIR.NE NE NE NE NE NE NE NE NE NE NE NE  
EYE LVL WND SPD.4 5 5 5 5 4 4 4 4 4 4 3  
EYE LVL WND GST.  
MIX HGT (KFT)...0.9 1.2 1.2 1.8 2.1 2.1 2.4 3.0 3.0 3.0 2.5 2.0  
TRANSP WIND DIR.NE NE NE NE NE NE E E E E E E  
TRANSP WIND SPD.17 18 18 21 18 18 17 17 16 15 16 17  
HAINES INDEX....4 4 4 4 4 4 4 4 4 4 4 4  
 

 
FORECASTER...HERNANDEZ  
REQUESTED BY...CHARLES DAVIS  
TYPE OF REQUEST...PRESCRIBED  
.TAG 1901495.3/FWD  
.DELDT 02/17/19  
.EMAIL JERRYANDERSON@FS.FED.US  
 
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