FNUS73 KLOT 301446 FWSLOT SPOT FORECAST FOR MIDEWIN RX PROJECTS...US FOREST SERVICE NATIONAL WEATHER SERVICE CHICAGO IL 946 AM CDT SAT OCT 30 2010 FORECAST IS BASED ON IGNITION TIME OF 1200 CDT ON OCTOBER 30. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...A LOW PRESSURE SYSTEM MOVING TO THE NORTH OF THE AREA WILL CAUSE WINDS TO INCREASE THIS AFTERNOON AND 20-FT WINDS COULD APPROACH RED FLAG CRITERIA OF 20 MPH WITH GUSTS TO NEAR 30 MPH. A STRONG INVERSION IS STILL IN PLACE AND WILL LIMIT MIXING HEIGHTS TO BELOW 3000 FT TODAY...BUT STRONGER TRANSPORT WINDS SHOULD ALLOW FOR FAIR TO GOOD SMOKE DISPERSAL TODAY. RELATIVE HUMIDITIES ARE EXPECTED TO DECREASE THIS AFTERNOON AND...AT ITS LOWEST...DROP TO NEAR 30 PERCENT. WINDS SHOULD DECREASE LATE IN THE EVENING AS A WEAK FRONTAL BOUNDARY APPROACHES AND THE PRESSURE GRADIENT RELAXES. STRONG RELATIVE HUMIDITY RECOVERIES ARE EXPECTED OVERNIGHT. .TODAY... SKY/WEATHER.........PARTLY CLOUDY. TEMPERATURE.........56 AT IGNITION...MAX 61. RH..................39 PERCENT AT IGNITION...MIN 35 PERCENT. WIND (20 FT)........WINDS SOUTHWEST AT 15 MPH AT IGNITION...OTHERWISE WEST WINDS 8 TO 15 MPH WITH GUSTS TO AROUND 30 MPH. CHANCE OF PCP.......0 PERCENT. MIXING HEIGHT.......100-300 FT AGL INCREASING TO 1600 FT AGL AT IGNITION...OTHERWISE INCREASING 2600-2800 FT AGL IN THE AFTERNOON THEN DECREASING TO 1900 FT AGL 1000 FT AGL IN THE EVENING. TRANSPORT WINDS.....SOUTHWEST 20 TO 29 MPH INCREASING TO WEST 33 TO 38 MPH IN THE LATE MORNING AND EARLY AFTERNOON...THEN DECREASING TO 20 TO 26 MPH LATE IN THE AFTERNOON. SMOKE DISPERSAL.....FAIR /52800 KNOT-FT/ AT IGNITION. MAX...GOOD /75500 KNOT-FT/. TIME (CDT) 12P 1PM 2PM 3PM 4PM 5PM 6PM SKY (%).........34 33 34 34 35 36 36 WEATHER COV..... WEATHER TYPE.... TEMP............56 58 59 60 60 59 56 RH..............39 37 36 34 32 35 41 20FT WIND DIR...230 240 240 260 260 270 280 20FT SPEED(MPH).16 16 16 16 15 13 7 20FT SPEED(KT)..14 14 14 14 13 11 6 20FT GUST(MPH)..29 28 28 28 25 22 16 20FT GUST(KT)...25 24 24 24 22 19 14 MIX HGT (KFT)...1.6 2.2 2.6 2.8 2.6 1.9 1.0 TRANSP WIND DIR.230 230 240 250 260 270 280 TRANSP WIND SPD.37 38 37 36 33 26 20 CWR.............0 0 0 0 0 0 0 VRATE KT-FT/100053 73 83 84 75 53 25 .TONIGHT... SKY/WEATHER.........PARTLY CLOUDY. TEMPERATURE.........MIN 37. RH..................MAX 91 PERCENT. WIND (20 FT)........WEST WINDS AROUND 6 MPH EARLY IN THE EVENING BECOMING LIGHT...THEN BECOMING NORTH 5 TO 6 MPH LATE IN THE EVENING. CHANCE OF PCPN......10 PERCENT. MIXING HEIGHT.......100-300 FT AGL. TRANSPORT WINDS.....NORTH 10 TO 15 MPH. SMOKE DISPERSAL.....POOR (0-3300 KNOT-FT). TIME (CDT) 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM 6AM SKY (%).........37 37 37 37 37 37 37 37 37 37 37 37 WEATHER COV..... WEATHER TYPE.... TEMP............53 51 49 47 45 44 43 42 40 39 38 37 RH..............47 54 61 69 77 84 89 91 91 90 90 88 20FT WIND DIR...290 290 310 320 330 350 350 000 000 000 000 010 20FT SPEED(MPH).5 3 3 3 3 4 5 5 5 5 5 5 20FT SPEED(KT)..4 3 3 3 3 3 4 4 4 4 4 4 20FT GUST(MPH)..10 10 10 10 10 9 8 8 9 9 9 9 20FT GUST(KT)...9 9 9 9 9 8 7 7 8 8 8 8 MIX HGT (KFT)...0.3 0.1 0.1 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.2 0.2 TRANSP WIND DIR.280 290 310 320 330 340 350 000 000 000 000 010 TRANSP WIND SPD.14 12 10 10 12 14 15 15 14 14 14 14 CWR.............0 0 0 0 0 0 10 10 10 10 10 10 VRATE KT-FT/10003 0 0 2 3 3 3 3 3 3 2 2 .SUNDAY... SKY/WEATHER.........PARTLY CLOUDY. TEMPERATURE.........MAX 53. RH..................MIN 44 PERCENT. WIND (20 FT)........NORTHEAST WINDS AROUND 6 MPH. CHANCE OF PCPN......10 PERCENT. MIXING HEIGHT.......300-700 FT AGL INCREASING TO 1300 FT AGL LATE IN THE MORNING...THEN INCREASING TO 2500 FT AGL LATE IN THE MORNING INCREASING TO 3700 FT AGL INCREASING TO 4700-5100 FT AGL DECREASING TO 4600 FT AGL LATE IN THE AFTERNOON DECREASING TO 3400 FT AGL DECREASING TO 1800 FT AGL LATE IN THE AFTERNOON. TRANSPORT WINDS.....NORTHEAST 14 TO 16 MPH. SMOKE DISPERSAL.....POOR TO GOOD (3000-61600 KNOT-FT). TIME (CDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM SKY (%).........37 37 38 39 39 40 41 41 41 41 42 42 WEATHER COV..... WEATHER TYPE.... TEMP............37 39 42 45 48 50 52 53 53 53 51 49 RH..............85 77 67 59 55 51 48 45 44 44 46 49 20FT WIND DIR...010 010 020 030 030 040 050 050 050 050 050 050 20FT SPEED(MPH).5 5 5 5 5 5 5 5 5 5 5 5 20FT SPEED(KT)..4 4 4 4 4 4 4 4 4 4 4 4 20FT GUST(MPH)..9 9 10 10 9 9 8 9 9 9 9 9 20FT GUST(KT)...8 8 9 9 8 8 7 8 8 8 8 8 MIX HGT (KFT)...0.3 0.4 0.7 1.3 2.5 3.7 4.7 5.1 5.1 4.6 3.4 1.8 TRANSP WIND DIR.010 010 020 030 030 040 050 050 050 050 050 050 TRANSP WIND SPD.14 14 14 14 14 14 14 14 14 14 15 16 CWR.............10 10 10 10 10 10 10 10 10 10 10 10 VRATE KT-FT/10003 5 9 16 30 45 56 62 62 55 41 23 $$ FORECASTER...DEUBELBEISS REQUESTED BY...JERRY HOFFMAN TYPE OF REQUEST...PRESCRIBED .TAG 20101030.MIDEW.01/LOT