FNUS73 KLOT 211543 FWSLOT SPOT FORECAST FOR GRAND BLVD UNIT 1...NATIONAL PARK SERVICE NATIONAL WEATHER SERVICE CHICAGO IL 1043 AM CDT WED MAR 21 2012 FORECAST IS BASED ON IGNITION TIME OF 1300 CDT ON MARCH 21. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION... VERY WARM...BREEZY AND DRY CONDITIONS WILL CONTINUE THROUGH THE AFTERNOON HOURS. TEMPERATURES ARE EXPECTED TO REACH THE MID 80S WITH DEW POINT TEMPERATURES DROPPING INTO THE LOWER 50S TO NEAR 50 BY MID AFTERNOON...RESULTING IN MINIMUM RELATIVE HUMIDITY VALUES DROPPING TO 30 TO 35 PERCENT. 20 FOOT WINDS FROM THE SOUTH WILL GUST 20 TO 25 MPH AT TIMES. DEW POINT TEMPERATURES WOULD NEED TO DROP INTO THE MID 40S TO ACHIEVE MINIMUM RELATIVE HUMIDITY OF 25 PERCENT AND RED FLAG WARNING CRITERIA...AND THIS IS NOT ANTICIPATED THIS AFTERNOON. .TODAY... SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY SUNNY THEN BECOMING PARTLY CLOUDY. TEMPERATURE.........82 AT IGNITION...MAX 83. RH..................35 PERCENT AT IGNITION...MIN 32 PERCENT. WIND (20 FT)........WINDS SOUTH AT 13 MPH AT IGNITION...OTHERWISE SOUTH WINDS 8 TO 13 MPH. GUSTS UP TO 25 MPH IN THE LATE MORNING AND AFTERNOON. CHANCE OF PCPN......10 PERCENT. MIXING HEIGHT.......300-600 FT AGL INCREASING TO 900-1200 FT AGL IN THE MORNING...THEN INCREASING TO 2800 FT AGL LATE IN THE MORNING INCREASING TO 4500 FT AGL INCREASING TO 6200 FT AGL AT IGNITION...OTHERWISE 6200 FT AGL INCREASING TO 6700-7100 FT AGL EARLY IN THE AFTERNOON INCREASING TO 7600 FT AGL DECREASING TO 5300 FT AGL LATE IN THE AFTERNOON DECREASING TO 2900 FT AGL. TRANSPORT WINDS.....SOUTH 20 TO 29 MPH INCREASING TO 24 TO 32 MPH IN THE AFTERNOON. SMOKE DISPERSAL.....EXCELLENT /167900 KNOT-FT/ AT IGNITION. MAX...EXCELLENT /207400 KNOT-FT/. TIME (CDT) 1PM 2PM 3PM 4PM 5PM 6PM SKY (%).........25 31 36 41 45 49 WEATHER COV..... WEATHER TYPE.... TEMP............82 83 83 83 82 81 RH..............35 33 32 33 35 38 20FT WIND DIR...190 190 190 200 190 190 20FT SPEED(MPH).10 10 10 10 9 8 20FT SPEED(KT)..9 9 8 8 8 7 20FT GUST(MPH)..24 25 25 24 21 17 20FT GUST(KT)...21 22 22 21 18 15 MIX HGT (KFT)...6.2 6.7 7.1 7.6 5.3 2.9 TRANSP WIND DIR.190 190 190 190 190 190 TRANSP WIND SPD.31 32 31 29 26 24 CWR.............10 10 10 10 10 10 VRATE KT-FT/1000168 197 207 193 139 70 .TONIGHT... SKY/WEATHER.........PARTLY CLOUDY. TEMPERATURE.........MIN 59. RH..................MAX 78 PERCENT. WIND (20 FT)........SOUTHEAST WINDS 6 TO 9 MPH. CHANCE OF PCPN......10 PERCENT. MIXING HEIGHT.......300-600 FT AGL. TRANSPORT WINDS.....SOUTHEAST 14 TO 22 MPH. SMOKE DISPERSAL.....POOR (0-11700 KNOT-FT). TIME (CDT) 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM 6AM SKY (%).........53 54 54 55 56 57 57 58 59 59 60 60 WEATHER COV..... WEATHER TYPE.... TEMP............79 77 74 72 69 67 66 64 63 62 60 59 RH..............42 45 50 53 59 61 63 67 67 70 75 78 20FT WIND DIR...190 190 180 180 170 160 160 160 160 160 150 150 20FT SPEED(MPH).7 6 6 6 6 6 6 6 5 5 5 5 20FT SPEED(KT)..6 6 6 6 5 5 5 5 4 4 4 4 20FT GUST(MPH)..15 15 14 14 14 13 13 12 12 10 10 9 20FT GUST(KT)...13 13 12 12 12 11 11 10 10 9 9 8 MIX HGT (KFT)...0.6 0.5 0.4 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 TRANSP WIND DIR.190 190 180 180 170 170 160 160 160 160 150 150 TRANSP WIND SPD.22 21 21 20 20 18 18 17 16 16 15 14 CWR.............10 10 10 10 10 10 10 10 10 10 10 10 VRATE KT-FT/100012 0 0 4 4 4 4 4 4 3 3 3 .THURSDAY... SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS IN THE AFTERNOON. TEMPERATURE.........MAX 75. RH..................MIN 57 PERCENT. WIND (20 FT)........SOUTHEAST WINDS 5 TO 8 MPH BECOMING LIGHT. GUSTY AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS. CHANCE OF PCPN......30 PERCENT. MIXING HEIGHT.......300-600 FT AGL INCREASING TO 2000 FT AGL LATE IN THE MORNING...THEN INCREASING TO 3500 FT AGL INCREASING TO 4900-5300 FT AGL EARLY IN THE AFTERNOON DECREASING TO 4200 FT AGL DECREASING TO 3200 FT AGL LATE IN THE AFTERNOON. TRANSPORT WINDS.....SOUTHEAST 12 TO 21 MPH DECREASING TO AROUND 10 MPH LATE IN THE AFTERNOON. SMOKE DISPERSAL.....POOR TO GOOD (700-87100 KNOT-FT). TIME (CDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM SKY (%).........61 61 61 61 62 62 62 68 74 81 87 93 WEATHER COV.....SCH SCH SCH SCH SCH SCH CHC CHC CHC CHC CHC CHC WEATHER TYPE....RW RW RW RW RW RW RW RW RW RW RW RW TEMP............59 62 66 70 72 74 75 75 75 75 74 73 RH..............80 78 70 68 66 66 66 66 64 60 59 57 20FT WIND DIR...150 150 160 170 180 190 190 180 170 150 140 130 20FT SPEED(MPH).5 5 6 6 6 6 6 6 5 5 4 3 20FT SPEED(KT)..4 4 5 5 6 6 6 5 4 4 3 3 20FT GUST(MPH)..9 10 12 12 12 13 13 13 12 10 9 9 20FT GUST(KT)...8 9 10 10 10 11 11 11 10 9 8 8 MIX HGT (KFT)...0.3 0.4 0.5 0.6 2.0 3.5 4.9 5.0 5.2 5.3 4.2 3.2 TRANSP WIND DIR.150 160 170 170 170 180 190 180 160 150 150 130 TRANSP WIND SPD.14 15 16 18 20 21 20 18 16 14 12 10 CWR.............20 20 20 20 20 20 40 40 40 40 40 40 VRATE KT-FT/10003 1 1 9 35 65 86 87 77 61 47 30 $$ FORECASTER...RATZER REQUESTED BY...NEAL MULCONREY TYPE OF REQUEST...PRESCRIBED .TAG 20120321.GRAND.01/LOT