263  
FNUS73 KFSD 061417  
FWSFSD  
 
SPOT FORECAST FOR HOLY TRINITY (SUMMER SLASH PILES)...U.S. FISH & WILDLIFE  
NATIONAL WEATHER SERVICE SIOUX FALLS SD  
917 AM CDT THU JUL 6 2017  
 
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
 
A STRONG LAYER OF WARM AIR ALOFT SHOULD PRECLUDE THE THREAT FOR  
THUNDERSTORMS ALONG A FRONTAL BOUNDARY, EXPECTED TO PASS THE BURN AREA  
IN THE EARLY AFTERNOON. WINDS WILL INCREASE THROUGH THE LATER MORNING  
FROM THE SOUTHWEST, THEN BECOME GRADUALLY MORE WEST UNTIL A WIND SHIFT  
TO A MORE NORTHERLY COMPONENT LATE AFTERNOON. HUMIDITY LEVELS WILL LIKELY  
REMAIN ELEVATED UNTIL PASSAGE OF THE FRONT.  
   
TODAY
 
 
MAX TEMPERATURE.....88-93.  
MIN HUMIDITY........45 PERCENT.  
 
TIME (CDT) 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY COVER.......PC PC MCR MCR MCR MCR MCR MCR MCR  
SKY (%).........34 28 23 19 14 15 17 18 15  
WEATHER COV.....  
WEATHER TYPE....  
TEMP............77 81 84 88 90 91 91 91 91  
DEWPOINT........65 67 68 68 68 68 68 67 66  
RH..............68 63 58 53 49 47 47 45 45  
20 FT WIND DIR..WSW WSW WSW SW WSW W W NW NW  
20 FT WIND SPD..5 7 9 12 13 14 15 16 15  
20 FT WIND GUST. 10 17 18 20 20 22 20  
SMOKE DISPERSAL.PR FR FR GD GD GD GD GD EX  
MIX HGT (KFT)...0.6 1.4 1.9 2.4 2.9 3.4 3.7 3.9 4.2  
TRANSP WIND DIR.SW SW SW WSW WSW W NW NNW NNW  
TRANSP WIND SPD. 7 11 14 20 21 21 21 22 23  
CHC OF PCPN (%). 0 0 0 0 0 10 10 0 0  
HAINES INDEX.... 6 6 5 5 4 4 3 3 3  
   
TONIGHT
 
 
MIN TEMPERATURE.....57-62.  
MAX HUMIDITY........84 PERCENT.  
 
TIME (CDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM  
SKY COVER.......MCLEAR MCLEAR CLEAR MCLEAR CLEAR CLEAR  
SKY (%).........12 7 4 6 5 2  
WEATHER COV.....  
WEATHER TYPE....NONE NONE NONE NONE NONE NONE  
TEMP............89 83 74 70 66 61  
DEWPOINT........65 64 61 58 56 55  
RH..............45 53 64 66 70 81  
20 FT WIND......NNW 15 NNW 13 N 9 N 9 N 8 NNW 8  
20 FT WIND GUST.20 15 10 10 10 10  
SMOKE DISPERSAL.EXCEL EXCEL POOR POOR POOR POOR  
MIX HGT (FT)....4400 3800 300 300 300 300  
TRANSPORT WIND..NNW 25 N 22 NNW 12 N 13 N 12 NNW 9  
CHC OF PCPN (%).0 0 0 0 0 0  
HAINES INDEX....3 3 4 5 5 4  
   
FRIDAY
 
 
MAX TEMPERATURE.....78-83.  
MIN HUMIDITY........44 PERCENT.  
 
TIME (CDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM  
SKY COVER.......MCLEAR MCLEAR MCLEAR PCLDY PCLDY PCLDY  
SKY (%).........12 17 18 26 30 33  
WEATHER COV.....  
WEATHER TYPE....NONE NONE NONE NONE NONE NONE  
TEMP............60 64 72 76 79 81  
DEWPOINT........55 56 58 57 57 57  
RH..............84 75 61 52 47 44  
20 FT WIND......NNW 7 NNW 8 NNW 9 NNW 12 NNW 13 NNW 13  
20 FT WIND GUST.10 10 15 15 20 20  
SMOKE DISPERSAL.POOR POOR GOOD EXCEL EXCEL EXCEL  
MIX HGT (FT)....300 1100 2800 3900 5000 6000  
TRANSPORT WIND..NNW 8 NNW 12 N 20 NNW 24 NNW 25 NNW 24  
CHC OF PCPN (%).0 0 0 0 0 0  
HAINES INDEX....4 4 5 4 4 3  
 

 
FORECASTER...CHAPMAN  
REQUESTED BY...ERIC EARHART  
TYPE OF REQUEST...PRESCRIBED  
.TAG 1712231.0/FSD  
 
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