FNUS73 KLOT 041348 FWSLOT SPOT FORECAST FOR MIDDLE GRANT CREEK...MIDEIWIN NATIONAL WEATHER SERVICE CHICAGO IL 848 AM CDT SAT APR 4 2009 FORECAST IS BASED ON IGNITION TIME OF 1200 CDT ON APRIL 04. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...A WEAK RIDGE OF HIGH PRESSURE WILL MOVE EAST ACROSS THE AREA TODAY. WINDS WILL BE LIGHT THROUGH THE MIXED LAYER...BUT WILL BEGIN TO INCREASE DURING THE AFTERNOON AS THE RIDGE OF HIGH PRESSURE SLOWLY MOVES EAST. SKY COVER WILL RANGE FROM MOSTLY SUNNY TO PARTLY CLOUDY AS AREAS OF MID AND HIGH CLOUD COVER PASS ACROSS THE REGION. VENTILATION RATE INCLUDED BY HOUR IN THE TABULAR FORECAST BELOW AS WELL AS IN THE TEXT...AS SMOKE DISPERSAL. .TODAY... SKY/WEATHER.........MOSTLY SUNNY. TEMPERATURE.........50 AT IGNITION...MAX 53. RH..................45 PERCENT AT IGNITION...MIN 39 PERCENT. WIND (20 FT)........WINDS EAST AT 4 MPH AT IGNITION...OTHERWISE LIGHT WINDS THIS MORNING BECOMING EAST 7 TO 10 MPH DURING THE AFTERNOON. CHANCE OF PCPN......10 PERCENT. MIXING HEIGHT.......900 FT AGL IN THE MORNING...THEN INCREASING TO 3500 FT AGL AT IGNITION...INCREASING TO 3800 AGL IN THE AFTERNOON...THEN DECREASING TO 2500 FT AGL BY EVENING. TRANSPORT WINDS.....EAST 8 TO 16 MPH. SMOKE DISPERSAL.....FAIR /24600 KNOT-FT/ AT IGNITION. MAX...GOOD /33000 KNOT-FT/. TIME (CDT) 12P 1PM 2PM 3PM 4PM 5PM 6PM SKY (%).........36 36 38 41 43 45 47 WEATHER COV..... WEATHER TYPE.... TEMP............50 52 53 52 51 49 48 RH..............45 41 40 39 40 43 46 20 FT WIND DIR..070 070 070 070 070 070 070 20 FT WIND SPD..2 2 3 4 5 6 6 20 FT WIND GUST.5 5 5 10 10 15 15 MIX HGT (KFT)...3.5 3.7 3.8 3.8 3.5 3.1 2.5 TRANSP WIND DIR.040 040 050 080 090 080 080 TRANSP WIND SPD.8 8 8 8 9 12 16 CWR.............0 10 10 10 10 10 10 VRATE KT-FT/100025 26 27 26 26 30 33 .TONIGHT... SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY. CHANCE OF SPRINKLES IN THE EVENING...THEN CHANCE OF RAIN AFTER MIDNIGHT. TEMPERATURE.........MIN 36. RH..................MAX 82 PERCENT. WIND (20 FT)........NORTHEAST WINDS 9 TO 10 MPH WITH GUSTS TO AROUND 25 MPH. CHANCE OF PCPN......30 PERCENT. MIXING HEIGHT.......2000 FT AGL DECREASING TO 400 FT AGL AFTER OVERNIGHT THEN INCREASING TO 800 FT AGL EARLY IN THE MORNING. TRANSPORT WINDS.....EAST 21 TO 28 MPH. SMOKE DISPERSAL.....POOR TO GOOD (8400-35100 KNOT-FT). TIME (CDT) 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM 6AM SKY (%).........49 52 55 58 58 58 58 64 70 76 80 85 WEATHER COV.....CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC WEATHER TYPE....RW RW RW RW RW RW RN RN RN RN RN RN TEMP............46 44 43 41 40 38 37 37 36 36 36 37 RH..............50 53 56 59 62 66 70 73 77 79 81 82 20 FT WIND DIR..070 070 070 070 080 080 080 080 070 070 070 060 20 FT WIND SPD..7 8 8 8 8 8 8 8 8 8 8 8 20 FT WIND GUST.20 20 25 25 25 25 25 25 25 25 25 25 MIX HGT (KFT)...2.0 1.6 1.4 1.2 0.9 0.7 0.5 0.4 0.4 0.5 0.6 0.8 TRANSP WIND DIR.080 080 080 080 080 080 080 080 080 070 070 070 TRANSP WIND SPD.21 23 25 26 26 25 24 24 24 25 26 28 CWR.............20 20 20 20 20 20 40 40 40 40 40 40 VRATE KT-FT/100035 34 32 28 22 16 11 9 8 10 14 20 .SUNDAY... SKY/WEATHER.........CLOUDY. RAIN. TEMPERATURE.........MAX 40. RH..................MIN 83 PERCENT. WIND (20 FT)........NORTHEAST WINDS 10 TO 12 MPH WITH GUSTS TO AROUND 25 MPH. CHANCE OF PCPN......90 PERCENT. MIXING HEIGHT.......1000 FT AGL INCREASING TO 1200 FT AGL EARLY IN THE MORNING...THEN INCREASING TO 1400 FT AGL EARLY IN THE MORNING INCREASING TO 1600 FT AGL LATE IN THE MORNING INCREASING TO 1700 FT AGL DECREASING TO 1600 FT AGL LATE IN THE AFTERNOON. TRANSPORT WINDS.....NORTHEAST 26 TO 32 MPH. SMOKE DISPERSAL.....FAIR TO GOOD (25900-45600 KNOT-FT). TIME (CDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM SKY (%).........89 88 87 87 88 89 90 90 90 90 93 95 WEATHER COV.....DEF DEF DEF DEF DEF DEF DEF DEF DEF DEF DEF DEF WEATHER TYPE....RN RN RN RN RN RN RN RN RN RN RN RN TEMP............37 37 38 39 39 40 40 40 40 39 39 38 RH..............83 84 86 87 89 91 93 95 96 96 96 95 20 FT WIND DIR..060 060 060 060 070 070 070 060 050 040 030 020 20 FT WIND SPD..8 8 8 8 8 8 8 8 8 9 9 10 20 FT WIND GUST.25 20 20 20 20 20 20 20 20 25 25 25 MIX HGT (KFT)...1.0 1.2 1.4 1.6 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.6 TRANSP WIND DIR.070 070 070 070 070 070 070 070 060 050 050 040 TRANSP WIND SPD.29 29 29 29 28 26 26 28 29 30 31 32 CWR.............90 90 90 90 90 90 90 90 90 90 90 90 VRATE KT-FT/100026 31 36 39 40 39 39 41 44 46 45 45 $$ FORECASTER...SULLIVAN REQUESTED BY...JERRY HOFFMAN TYPE OF REQUEST...PRESCRIBED .TAG 20090404.MIDDL.01/LOT