224  
FNUS74 KFWD 262205  
FWSFWD  
 
SPOT FORECAST FOR LBJ NG UNIT 71...USFS  
NATIONAL WEATHER SERVICE FORT WORTH TX  
405 PM CST THU JAN 26 2023  
 
FORECAST IS BASED ON IGNITION TIME OF 0900 CST ON JANUARY 27.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
 
FRIDAY WILL BE MOSTLY SUNNY, WARMER, AND DRY, WITH AFTERNOON RH  
VALUES FALLING INTO THE 30S. WINDS WILL BE OUT OF THE SOUTHWEST AT  
10-15 MPH WITH GUSTS BETWEEN 20-30 MPH DURING THE AFTERNOON  
HOURS. NO SIGNIFICANT DIRECTIONAL WIND SHIFTS ARE EXPECTED THROUGH  
THE PERIOD. GREATER MOISTURE CONTENT WILL ARRIVE FRIDAY NIGHT AND  
EARLY SATURDAY WITH RH RECOVERING TO AROUND 85% AND ONLY FALLING  
INTO THE MID 50S DURING THE DAYTIME ON SATURDAY.  
   
FRIDAY
 
 
SKY/WEATHER.........SUNNY (0-5 PERCENT).  
MAX TEMPERATURE.....AROUND 59.  
MIN HUMIDITY........32 PERCENT.  
WIND (20 FT)........SOUTHWEST WINDS 12 TO 17 MPH.  
MIXING HEIGHT.......4700 FT AGL.  
TRANSPORT WINDS.....SOUTHWEST 17 TO 23 MPH.  
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
 
TIME (CST) 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........2 3 3 1 2 1 2 0 3  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
TEMP............39 44 48 52 55 57 58 59 57  
RH..............62 53 49 43 37 35 33 32 34  
20 FT WIND DIR..SW SW SW SW SW SW SW SW SW  
20 FT WIND SPD..15 17 18 17 17 16 16 14 13  
20 FT WIND GUST.22 26 26 26 25 22 22 22 18  
MIX HGT (KFT)...0.6 1.2 2.0 3.0 3.7 4.2 4.7 4.2 1.0  
TRANSP WIND DIR.SW SW W W SW SW SW SW SW  
TRANSP WIND SPD.17 21 23 23 22 23 23 21 17  
HAINES INDEX....5 5 5 5 5 5 5 5 5  
   
FRIDAY NIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR (20-30 PERCENT) THEN BECOMING  
MOSTLY CLOUDY (50-60 PERCENT).  
MIN TEMPERATURE.....AROUND 43.  
MAX HUMIDITY........86 PERCENT.  
WIND (20 FT)........SOUTH WINDS 9 TO 18 MPH INCREASING TO 18 TO 20  
MPH AFTER 3 AM.  
MIXING HEIGHT.......400 FT AGL.  
TRANSPORT WINDS.....SOUTH 15 TO 22 MPH.  
HAINES INDEX........4 TO 5 OR LOW TO MODERATE POTENTIAL FOR LARGE  
PLUME DOMINATED FIRE GROWTH.  
 
TIME (CST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM  
SKY (%).........4 2 4 2 3 5 7 15 23 31 43 54  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
TEMP............53 52 48 47 46 46 45 45 44 44 44 44  
RH..............41 43 51 53 58 61 65 69 72 76 79 82  
20 FT WIND DIR..S S S S S S S S S S S S  
20 FT WIND SPD..10 12 13 15 17 18 18 20 21 22 22 21  
20 FT WIND GUST.16 17 20 23 26 28 29 30 31 31 31 30  
MIX HGT (KFT)...0.4 0.4 0.4 0.5 0.5 0.5 0.5 0.5 0.5 0.6 0.5 0.5  
TRANSP WIND DIR.S S S S S S S S S S S S  
TRANSP WIND SPD.15 15 17 20 20 20 21 21 21 22 22 21  
HAINES INDEX....5 5 5 5 5 5 4 4 4 4 4 4  
   
SATURDAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT).  
MAX TEMPERATURE.....AROUND 65.  
MIN HUMIDITY........56 PERCENT.  
WIND (20 FT)........SOUTH WINDS 14 TO 18 MPH.  
MIXING HEIGHT.......2900 FT AGL.  
TRANSPORT WINDS.....SOUTH 17 TO 25 MPH.  
HAINES INDEX........3 TO 4 OR VERY LOW TO LOW POTENTIAL FOR LARGE  
PLUME DOMINATED FIRE GROWTH.  
 
TIME (CST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........66 70 73 77 78 80 81 80 79 78 82 85  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
TEMP............44 46 47 49 52 55 58 60 63 65 64 63  
RH..............86 86 86 86 80 74 69 64 60 56 59 62  
20 FT WIND DIR..S S S S S S S S S S S S  
20 FT WIND SPD..20 20 21 21 21 21 21 21 20 18 17 15  
20 FT WIND GUST.30 30 30 30 30 31 31 30 29 28 25 23  
MIX HGT (KFT)...0.5 0.8 1.0 1.2 1.6 1.9 2.2 2.5 2.7 2.9 2.1 1.3  
TRANSP WIND DIR.S S S S S S S S SW SW S S  
TRANSP WIND SPD.20 20 21 22 23 24 25 25 24 22 20 17  
HAINES INDEX....3 3 3 3 3 3 4 4 4 4 4 4  
 

 
FORECASTER...STALLEY  
REQUESTED BY...CHARLES DAVIS  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2301454.0/FWD  
.DELDT 01/26/23  
.FORMATTERVERSION 2.0.0  
.EMAIL CHARLES.G.DAVIS@USDA.GOV  
 
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