941  
FNUS73 KDLH 151052  
FWSDLH  
 
SPOT FORECAST FOR NW SANDS...USFS  
NATIONAL WEATHER SERVICE DULUTH MN  
552 AM CDT THU AUG 15 2019  
 
FORECAST IS BASED ON IGNITION TIME OF 1100 CDT ON AUGUST 15.  
IF THERE ARE QUESTIONS OR CONCERNS WITH THIS FORECAST...  
PLEASE CALL THE NATIONAL WEATHER SERVICE.  
   
DISCUSSION
 
 
A WEAK HIGH WILL NUDGE INTO NORTHWEST WISCONSIN TODAY, WHILE A  
BROAD LOW DEVELOPS OVER THE EASTERN DAKOTAS. THIS WILL BRING MORE  
SUNSHINE THAN CLOUDS AT THE BURN SITE THIS MORNING. CLOUD COVER  
WILL INCREASE AS THE DAY PROGRESSES. WINDS WILL BE SOUTHWESTERLY  
THROUGH THE DAY. THE MIXED LAYER WILL GROW THIS AFTERNOON AND  
EXPECT GUSTS OF 10-15 MPH. THERE MAY BE OCCASIONAL GUSTS OF UP TO  
20 MPH AT TIMES. EXPECT MINIMUM RELATIVE HUMIDITIES BETWEEN 40-45  
PERCENT. HIGHS WILL BE IN THE MID TO UPPER 70S. THE BEST  
OPPORTUNITY FOR SHOWERS AND STORMS IS TONIGHT AS THE LOW SLIDES  
INTO THE REGION. A FEW DIURNALLY DRIVEN SHOWERS COULD DEVELOP THIS  
AFTERNOON NEAR OR OVER THE BURN SITE, HOWEVER CONFIDENCE IN THIS  
PARTICULAR OUTCOME IS QUITE LOW DUE TO THE HIGH NUDGING IN.  
 
SHOWER AND THUNDERSTORMS WILL MOVE IN TONIGHT AND CHANCES WILL  
CONTINUE THROUGH MUCH OF WEDNESDAY AS THE BROAD LOW MOVES THROUGH.  
 
   
REST OF TODAY
 
 
SKY/WEATHER.........MOSTLY SUNNY.  
MAX TEMPERATURE.....AROUND 77.  
MIN HUMIDITY........40-45 PERCENT.  
WIND (20 FT)........SOUTHWEST WINDS AROUND 5 MPH. WIND GUSTS OF  
10-15 MPH THIS AFTERNOON.  
COULD SEE ISOLATED GUSTS UP TO 20 MPH  
THIS AFTERNOON.  
MIXING HEIGHT.......8200 FT AGL INCREASING TO 9000 FT AGL LATE  
IN THE AFTERNOON.  
TRANSPORT WINDS.....SOUTHWEST 10 TO 15 MPH.  
SMOKE DISPERSAL.....GOOD TO EXCELLENT (59300-75100 KNOT-FT)  
INCREASING TO EXCELLENT  
(85900-112600 KNOT-FT) LATE IN THE  
AFTERNOON.  
 
TIME (CDT) 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY COVER.......PC PC PC PC PC PC MC  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
TEMP............72 74 76 77 77 77 76  
RH..............55 51 48 45 43 46 48  
20 FT WIND DIR..SW SW SW SW SW SW SW  
20 FT WIND SPD..4 5 5 5 5 5 5  
20 FT WIND GUST.8 10 12 12 15 14 13  
MIX HGT (KFT)...6.4 7.3 8.2 8.4 8.7 9.0 8.4  
TRANSP WIND DIR.W SW SW SW SW SW SW  
TRANSP WIND SPD.10 10 10 12 13 15 15  
SDSPL KT-FT/100059 66 75 86 100 113 111  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS IN THE  
EVENING. A SLIGHT CHANCE OF THUNDERSTORMS  
THROUGH THE NIGHT. SHOWERS LIKELY OVERNIGHT.  
CHANCE OF PRECIPITATION 60 PERCENT.  
MIN TEMPERATURE.....AROUND 58.  
MAX HUMIDITY........97 PERCENT.  
WIND (20 FT)........SOUTH WINDS 4 TO 5 MPH. GUSTY AND ERRATIC WINDS  
EXPECTED NEAR THUNDERSTORMS IN THE LATE EVENING  
AND OVERNIGHT.  
MIXING HEIGHT.......7700 FT AGL DECREASING TO 300 FT AGL.  
TRANSPORT WINDS.....SOUTH 9 TO 16 MPH.  
SMOKE DISPERSAL.....EXCELLENT (93500-104900 KNOT-FT) DECREASING TO  
POOR (2500 KNOT-FT).  
 
TIME (CDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM  
SKY COVER.......MCLDY MCLDY MCLDY MCLDY MCLDY MCLDY  
WEATHER COV..... S CHC CHANCE CHANCE LIKELY  
WEATHER TYPE....NONE NONE RNSHWR RNSHWR RNSHWR RNSHWR  
TSTM COV........ S CHC S CHC S CHC S CHC  
TEMP............75 70 64 62 60 59  
RH..............52 59 65 75 87 93  
20 FT WIND......S 5 S 5 S 4 S 5 S 5 S 5  
20 FT WIND GUST.10 6 5 6 6  
MIX HGT (FT)....7700 4800 300 300 300 300  
TRANSPORT WIND..SW 16 SW 13 S 9 S 10 S 12 S 12  
SDSPL KT-FT/1000105 55 2 2 3 2  
 

 
FORECASTER...BILL  
REQUESTED BY...JEB BACKE  
TYPE OF REQUEST...PRESCRIBED  
.TAG 1913819.0/DLH  
.DELDT 08/15/19  
.FORMATTERVERSION 1.0.25  
.EMAIL JEB.BACKE@USDA.GOV  
 
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