FNUS73 KLOT 131302 FWSLOT SPOT FORECAST FOR WEST BEACH UNIT 1...NATIONAL PARK SERVICE NATIONAL WEATHER SERVICE CHICAGO IL 802 AM CDT WED APR 13 2011 FORECAST IS BASED ON IGNITION TIME OF 1000 CDT ON APRIL 13. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION... MOSTLY CLEAR SKIES AND LIGHT WINDS OVERNIGHT ALLOWED FOR STRONG RADIATIONAL COOLING AT THE SURFACE. THIS HAS CAUSED A STRONG SURFACE BASED INVERSION...WHICH WILL LIMIT THE AMOUNT OF LOW LEVEL MIXING. BY EARLY AFTERNOON...LAKE BREEZE DEVELOPMENT WILL KEEP ONSHORE WINDS OVER THE BURN AREA...WITH A NORTH-NORTHWESTERLY TO NORTHERLY DIRECTION AT LESS THAN 10 MPH. .TODAY... SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY SUNNY. TEMPERATURE.........51 AT IGNITION...MAX 62. RH..................46 PERCENT AT IGNITION...MIN 29 PERCENT. WIND (20 FT)........WINDS NORTH AT 1 MPH AT IGNITION...OTHERWISE LIGHT WINDS BECOMING NORTH 6 TO 8 MPH. CHANCE OF PCPN......0 PERCENT. MIXING HEIGHT.......300-700 FT AGL INCREASING TO 900 FT AGL AT IGNITION...OTHERWISE 900 FT AGL LATE IN THE MORNING...THEN INCREASING TO 1200 FT AGL LATE IN THE MORNING INCREASING TO 1400 FT AGL INCREASING TO 2200-2400 FT AGL IN THE EARLY AFTERNOON DECREASING TO 1700 FT AGL LATE IN THE AFTERNOON DECREASING TO 1200 FT AGL BY EARLY EVENING. TRANSPORT WINDS.....NORTH 2 TO 8 MPH INCREASING TO 14 TO 21 MPH. SMOKE DISPERSAL.....POOR /2200 KNOT-FT/ AT IGNITION. MAX...GOOD /64200 KNOT-FT/. TIME (CDT) 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM SKY (%).........38 38 39 39 38 36 35 33 32 WEATHER COV..... WEATHER TYPE.... TEMP............51 55 58 59 60 60 60 60 58 RH..............46 38 33 30 29 31 31 32 36 20FT WIND DIR...020 010 350 330 330 330 330 340 000 20FT SPEED(MPH).1 3 5 6 6 6 5 5 5 20FT SPEED(KT)..1 3 4 6 5 5 4 4 4 20FT GUST(MPH).. 5 9 13 14 13 12 10 9 20FT GUST(KT)... 4 8 11 12 11 10 9 8 MIX HGT (KFT)...0.9 1.4 1.9 2.4 2.4 2.3 2.2 1.7 1.2 TRANSP WIND DIR.020 010 350 330 330 330 330 340 000 TRANSP WIND SPD.2 8 15 20 21 18 16 15 14 CWR.............0 0 0 0 0 0 0 0 0 VRATE KT-FT/10002 22 45 62 64 58 47 34 19 .TONIGHT... SKY/WEATHER.........PARTLY CLOUDY. TEMPERATURE.........MIN 39. RH..................MAX 85 PERCENT. WIND (20 FT)........NORTHEAST WINDS 5 TO 6 MPH EARLY IN THE EVENING BECOMING LIGHT...THEN BECOMING NORTHEAST 5 TO 7 MPH EARLY IN THE MORNING. CHANCE OF PCPN......10 PERCENT. MIXING HEIGHT.......300-700 FT AGL. TRANSPORT WINDS.....EAST 7 TO 15 MPH SHIFTING TO THE NORTHEAST AROUND 17 MPH EARLY IN THE MORNING. SMOKE DISPERSAL.....POOR (1300-6900 KNOT-FT). TIME (CDT) 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM 6AM SKY (%).........30 33 36 39 41 44 47 50 53 56 59 62 WEATHER COV..... WEATHER TYPE.... TEMP............54 50 47 45 43 43 42 41 40 39 39 39 RH..............41 46 51 53 55 55 57 62 67 76 79 85 20FT WIND DIR...010 030 070 090 100 140 150 140 120 090 070 040 20FT SPEED(MPH).5 4 4 3 2 2 2 2 3 4 5 6 20FT SPEED(KT)..4 3 3 3 2 2 2 2 3 3 4 5 20FT GUST(MPH)..8 7 6 6 5 3 3 5 7 9 12 14 20FT GUST(KT)...7 6 5 5 4 3 3 4 6 8 10 12 MIX HGT (KFT)...0.7 0.6 0.4 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 TRANSP WIND DIR.010 030 070 090 100 130 150 130 100 090 070 040 TRANSP WIND SPD.14 12 10 9 8 7 7 8 9 12 15 17 CWR.............10 10 10 10 10 10 10 10 10 10 10 10 VRATE KT-FT/10007 2 1 2 1 1 2 2 2 2 2 2 .THURSDAY... SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY. TEMPERATURE.........MAX 54. RH..................MIN 57 PERCENT. WIND (20 FT)........NORTHEAST WINDS 8 TO 12 MPH. GUSTS UP TO 26 MPH IN THE AFTERNOON. CHANCE OF PCPN......10 PERCENT. MIXING HEIGHT.......400-800 FT AGL INCREASING TO 1100-1500 FT AGL IN THE MORNING...THEN INCREASING TO 1700-1900 FT AGL LATE IN THE MORNING INCREASING TO 1900-2200 FT AGL EARLY IN THE AFTERNOON DECREASING TO 1300-1700 FT AGL DECREASING TO 1100 FT AGL LATE IN THE AFTERNOON. TRANSPORT WINDS.....NORTHEAST 21 TO 30 MPH. TIME (CDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM SKY (%).........66 65 64 63 62 62 61 61 62 62 63 63 WEATHER COV..... WEATHER TYPE.... TEMP............40 42 45 48 51 53 54 54 54 54 53 51 RH..............85 82 73 68 61 57 57 57 57 57 59 63 20FT WIND DIR...030 030 030 030 030 030 030 030 030 030 040 040 20FT SPEED(MPH).6 7 8 8 9 10 10 10 10 10 10 10 20FT SPEED(KT)..6 6 7 7 8 8 8 8 8 8 8 8 20FT GUST(MPH)..15 16 16 16 17 17 18 20 21 23 24 26 20FT GUST(KT)...13 14 14 14 15 15 16 17 18 20 21 23 MIX HGT (KFT)...0.4 0.8 1.1 1.5 1.7 1.9 2.2 1.9 1.7 1.5 1.3 1.1 TRANSP WIND DIR.030 030 030 030 030 030 030 030 030 030 040 040 TRANSP WIND SPD.21 22 24 25 26 26 28 29 29 30 30 29 CWR.............10 10 10 10 10 10 10 10 10 10 10 10 $$ FORECASTER...KREIN REQUESTED BY...WILLIAM MULLENS TYPE OF REQUEST...PRESCRIBED .TAG 20110413.WESTB.01/LOT