FNUS73 KDLH 181718 FWSDLH SPOT FORECAST FOR BOY RIVER RX...CHIPPEWA NF NATIONAL WEATHER SERVICE DULUTH MN 1218 PM CDT WED APR 18 2012 FORECAST IS BASED ON IGNITION TIME OF 1300 CDT ON APRIL 19. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION... SKIES WILL BE CLEARING OUT TONIGHT AS A LOW PRESSURE SYSTEM MOVES EAST OUT OF THE AREA AND WEAK HIGH PRESSURE BUILDS IN. THE NEXT SYSTEM WILL BE QUICK ON ITS HEELS...MOVING IN FROM THE WEST...ALTHOUGH MUCH FURTHER SOUTH THAN THE LAST SYSTEM. WILL LIKELY SEE THE BULK OF THE CLOUD COVER AND PRECIPITATION REMAIN WELL SOUTH OF THE PRESCRIBED BURN SITE. HOWEVER...DUE TO SLIGHT UNCERTAINTY STILL INCLUDING A SLIGHT CHANCE OF LIGHT RAIN THURSDAY AFTERNOON. WILL LIKELY SEE A THIN VAIL OF HIGH CLOUDS THROUGH THE DAY THURSDAY...WHICH WHEN COMBINED WITH A COOL AIR MASS WILL KEEP TEMPERATURES IN THE UPPER 40S. THE COOL TEMPS AND RECENT RAIN WITH A MOIST SURFACE LAYER...WILL KEEP HUMIDITIES RELATIVELY HIGH AS WELL. MINIMUM RH VALUES ARE ONLY EXPECTED TO DROP INTO THE UPPER 30 PERCENT RANGE THURSDAY AFTERNOON. WINDS SHOULD REMAIN LIGHT THROUGH THE DAY...WITH A FEW GUSTS 7 TO 9 MPH FROM THE SOUTHEAST IN THE LATE AFTERNOON. .TONIGHT... SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY. MIN TEMPERATURE.....29-34. MAX HUMIDITY........75-82 PERCENT. WIND (20 FT)........NORTH WINDS 4 TO 8 MPH WITH GUSTS AROUND 10 MPH EARLY IN THE EVENING THEN BECOMING LIGHT. MIXING HEIGHT.......4100 FT AGL DECREASING TO 300 FT AGL. TRANSPORT WINDS.....EAST 5 TO 10 MPH. SMOKE DISPERSAL.....EXCELLENT (63300) DECREASING TO POOR (550). TIME (CDT) 7 PM 9 PM 11 PM 1 AM 3 AM 5 AM TEMP............48 45 40 36 34 33 RH..............47 54 63 75 78 78 20 FT WIND DIR..N N NE E E E 20 FT WIND SPD..7 4 2 1 1 1 20 FT WIND GUST.10 5 .THURSDAY... SKY/WEATHER.........MOSTLY CLOUDY. A SLIGHT CHANCE OF RAIN SHOWERS IN THE AFTERNOON. CHANCE OF SHOWERS 20 PERCENT. MAX TEMPERATURE.....45-50. MIN HUMIDITY........37-42 PERCENT. WIND (20 FT)........LIGHT WINDS BECOMING EAST 3 TO 7 MPH IN THE EARLY AFTERNOON...THEN BECOMING SOUTHEAST IN THE LATE AFTERNOON. MIXING HEIGHT.......1200 FT AGL INCREASING TO 6700 FT AGL. TRANSPORT WINDS.....EAST 5 TO 10 MPH. SMOKE DISPERSAL.....POOR (9000) INCREASING TO GOOD (41900) IN THE LATE MORNING AND EARLY AFTERNOON...THEN DECREASING TO FAIR (20100) LATE IN THE AFTERNOON. TIME (CDT) 7 AM 9 AM 11 AM 1 PM 3 PM 5 PM TEMP............32 37 42 46 48 47 RH..............81 70 60 51 44 43 20 FT WIND DIR..E E E E SE SE 20 FT WIND SPD..2 4 5 6 5 5 20 FT WIND GUST. 5 6 8 7 7 .THURSDAY NIGHT... SKY/WEATHER.........MOSTLY CLOUDY IN THE EARLY EVENING...THE BECOMING PARTLY CLOUDY LATE. MIN TEMPERATURE.....26-31. MAX HUMIDITY........86-91 PERCENT. WIND (20 FT)........SOUTHEAST WINDS 3 TO 5 MPH IN THE EVENING BECOMING LIGHT AND VARIABLE LATE. MIXING HEIGHT.......3500 FT AGL DECREASING TO 300 FT AGL IN THE LATE EVENING AND OVERNIGHT. TRANSPORT WINDS.....EAST 5 TO 10 MPH BECOMING NORTHEAST LATE. SMOKE DISPERSAL.....POOR (9100) DECREASING TO POOR (1200) IN THE LATE EVENING AND OVERNIGHT. TIME (CDT) 7 PM 9 PM 11 PM 1 AM 3 AM 5 AM TEMP............46 41 37 35 32 30 RH..............47 57 67 69 78 85 20 FT WIND DIR..SE S S SW SW NW 20 FT WIND SPD..5 4 4 3 2 1 20 FT WIND GUST.6 5 5 $$ FORECASTER...BRIAN REQUESTED BY...MIKE RICE TYPE OF REQUEST...PRESCRIBED .TAG 20120419.BOYRI.01/DLH