682  
FNUS74 KTSA 160433  
FWSTSA  
 
SPOT FORECAST FOR BOS EARTH, WIND AND FIRE...U.S. FOREST SERVICE  
NATIONAL WEATHER SERVICE TULSA OK  
1133 PM CDT MON APR 15 2019  
 
FORECAST IS BASED ON IGNITION TIME OF 1000 CDT ON APRIL 16.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
 
PLEASE CONTACT NWS TULSA AT (918)838-7838, IF YOU HAVE QUESTIONS  
OR CONCERNS WITH THIS FORECAST.  
   
DISCUSSION
 
 
SOUTH WINDS WILL GUST TO 15 TO 20 MILES AN HOUR UNDER PARTLY  
CLOUDY SKIES.  
   
TUESDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY (35-45 PERCENT).  
MAX TEMPERATURE.....AROUND 73.  
MIN HUMIDITY........49 PERCENT.  
DEWPOINT............52.  
WIND (20 FT)........SOUTH WINDS 9 TO 12 MPH.  
MIXING HEIGHT.......4200 FT AGL.  
TRANSPORT WINDS.....SOUTHWEST 17 TO 26 MPH SHIFTING TO THE SOUTH 24  
TO 28 MPH LATE IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (10700 KNOT-FT) EARLY IN THE MORNING  
INCREASING TO FAIR (16300 KNOT-FT) IN THE  
AFTERNOON.  
STABILITY CLASS.....3.  
 
TIME (CDT) 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........35 40 44 49 48 47 46 45  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
TEMP............62 65 67 69 71 72 73 73  
DEWPOINT........51 52 52 53 53 53 53 53  
RH..............67 63 59 57 53 51 49 49  
20 FT WIND DIR..S S S S S S S S  
20 FT WIND SPD..10 10 11 11 11 12 12 11  
20 FT WIND GUST.13 14 14 16 17 18 18 18  
MIX HGT (KFT)...1.5 2.2 3.0 3.6 4.0 4.2 4.1 3.8  
TRANSP WIND DIR.S S S SW SW SW S S  
TRANSP WIND SPD.17 20 23 26 28 28 26 24  
VRATE KT-FT/1K..11 11 11 16 16 16 16 16  
   
TUESDAY NIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY (40-50 PERCENT) THEN BECOMING  
MOSTLY CLOUDY (60-70 PERCENT).  
MIN TEMPERATURE.....AROUND 59.  
MAX HUMIDITY........78 PERCENT.  
DEWPOINT............53.  
WIND (20 FT)........SOUTH WINDS 8 TO 10 MPH.  
MIXING HEIGHT.......300 FT AGL.  
TRANSPORT WINDS.....SOUTH 14 TO 22 MPH DECREASING TO 10 TO 12 MPH  
IN THE LATE EVENING AND OVERNIGHT.  
SMOKE DISPERSAL.....FAIR (16300 KNOT-FT) EARLY IN THE EVENING  
DECREASING TO POOR (700 KNOT-FT) LATE IN THE  
NIGHT.  
STABILITY CLASS.....5.  
 
TIME (CDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM  
SKY (%).........44 43 47 52 57 61 66 71 71 72 72 73  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
TEMP............73 71 69 67 65 64 63 63 62 61 60 60  
DEWPOINT........53 53 53 53 53 53 53 53 53 53 53 53  
RH..............49 53 57 61 65 67 70 70 72 75 78 78  
20 FT WIND DIR..S S S S S S S S S S S S  
20 FT WIND SPD..11 11 10 10 9 9 8 8 8 8 8 8  
20 FT WIND GUST.17 16 16 14 14 13 12 11 11 11 11 11  
MIX HGT (KFT)...3.2 2.5 1.8 1.1 0.6 0.4 0.4 0.5 0.4 0.3 0.3 0.4  
TRANSP WIND DIR.S S S S S S S S S S S S  
TRANSP WIND SPD.22 20 16 14 12 10 10 10 10 10 10 10  
VRATE KT-FT/1K..16 9 9 9 9 9 9 1 1 1 1 1  
   
WEDNESDAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY (75-85 PERCENT). CHANCE OF  
SHOWERS AND THUNDERSTORMS IN THE AFTERNOON.  
MAX TEMPERATURE.....AROUND 70.  
MIN HUMIDITY........66 PERCENT.  
DEWPOINT............56 INCREASING TO 59 LATE IN THE AFTERNOON.  
WIND (20 FT)........SOUTH WINDS 8 TO 10 MPH. GUSTY AND ERRATIC  
WINDS EXPECTED NEAR THUNDERSTORMS IN THE  
AFTERNOON.  
MIXING HEIGHT.......3500 FT AGL.  
TRANSPORT WINDS.....SOUTH 10 TO 17 MPH INCREASING TO 22 TO 25 MPH  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (700 KNOT-FT) EARLY IN THE MORNING  
INCREASING TO FAIR (16000 KNOT-FT) IN THE  
AFTERNOON.  
STABILITY CLASS.....4.  
 
TIME (CDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........73 73 73 73 73 73 73 73 76 79 82 85  
WEATHER COV..... CHC CHC CHC CHC CHC  
WEATHER TYPE.... RW RW RW RW RW  
TSTM COV........ CHC CHC CHC CHC CHC  
TEMP............59 59 60 62 64 65 67 68 69 70 70 70  
DEWPOINT........54 54 55 55 56 57 57 58 58 58 59 59  
RH..............83 83 84 78 75 75 70 70 68 66 68 68  
20 FT WIND DIR..S S S S S S S S S S S S  
20 FT WIND SPD..8 8 8 8 8 8 8 9 10 11 11 11  
20 FT WIND GUST.11 11 12 12 12 13 13 14 14 16 17 17  
MIX HGT (KFT)...0.5 0.7 0.7 0.8 1.1 1.9 2.8 3.5 3.5 3.2 2.9 2.9  
TRANSP WIND DIR.S S S S S S S S S S S S  
TRANSP WIND SPD.10 10 12 13 15 17 22 24 25 25 24 22  
VRATE KT-FT/1K..1 9 9 9 9 9 9 16 16 16 16 16  
 

 
FORECASTER...PLATE  
REQUESTED BY...HEATH THOMAS  
TYPE OF REQUEST...PRESCRIBED  
.TAG 1906241.0/TSA  
.DELDT 04/16/19  
.FORMATTERVERSION 1.0.26  
.EMAIL MHTHOMAS@FS.FED.US  
 
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