FNUS73 KDTX 041705 FWSDTX SPOT FORECAST FOR BIG SEVEN FEN...MI DNR NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI 105 PM EDT THU APR 4 2013 FORECAST IS BASED ON IGNITION TIME OF 1430 EDT ON APRIL 04. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION... TEMPERATURES AND WINDS WILL BOTH INCREASE TODAY AS SOUTHWEST FLOW DEVELOPS IN ADVANCE OF AN APPROACHING COLD FRONT. THE COLD FRONT WILL CROSS THE AREA TONIGHT AND BRING COLDER WEATHER AGAIN ON FRIDAY AS HIGH PRESSURE BUILDS INTO THE AREA WITH ITS PASSAGE. .REST OF TODAY... SKY/WEATHER.........MOSTLY SUNNY (20-30 PERCENT). TEMPERATURE.........51 AT IGNITION...MAX 53. RH..................29 PERCENT AT IGNITION...MIN 23 PERCENT. EYE LEVEL WINDS.....SOUTHWEST WINDS 9 TO 14 MPH. WIND (20 FT)........WINDS SOUTHWEST AT 16 MPH AT IGNITION...OTHERWISE SOUTHWEST WINDS 9 TO 14 MPH. TRANSPORT WINDS.....SOUTHWEST 13 TO 21 MPH. MIXING HEIGHT.......3900 FT AGL. HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH AT IGNITION...MAX 5. VENTILATION RATE....EXCELLENT (MAX...700). TIME (EDT) 2PM 3PM 4PM 5PM 6PM 7PM SKY (%).........13 18 23 29 34 40 WEATHER COV..... WEATHER TYPE.... TEMP............48 51 53 53 52 49 RH..............29 26 23 24 26 30 20 FT WIND DIR..SW SW SW SW SW SW 20 FT WIND SPD..12 13 13 12 11 10 20 FT WIND GUST.25 25 25 25 20 20 EYE LVL WND DIR.SW SW SW SW SW SW EYE LVL WND SPD.12 13 13 12 11 10 EYE LVL WND GST.25 25 25 25 20 20 MIX HGT (KFT)...3.4 3.7 3.9 3.8 3.3 2.7 HAINES INDEX....4 4 5 5 5 5 VRATE (KT-FT)...500 600 700 600 500 300 .TONIGHT... SKY/WEATHER.........PARTLY CLOUDY (40-50 PERCENT). TEMPERATURE.........MIN 30. RH..................MAX 89 PERCENT. EYE LEVEL WINDS.....SOUTHWEST BECOMING NORTH WINDS 5 TO 10 MPH. WIND (20 FT)........SOUTHWEST BECOMING NORTH WINDS 5 TO 10 MPH. TRANSPORT WINDS.....SOUTHWEST BECOMING NORTH 8 TO 13 MPH. MIXING HEIGHT.......300 FT AGL. HAINES INDEX........2 TO 5 OR OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH TO OR MODERATE POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. VENTILATION RATE....POOR (MIN...0). TIME (EDT) 8 PM 10 PM MIDNGT 2 AM 4 AM 6 AM SKY (%).........45 48 51 54 45 36 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE NONE NONE TEMP............46 42 40 39 34 30 RH..............37 47 56 68 81 89 20 FT WIND DIR..SW W W NW N N 20 FT WIND SPD..8 7 6 6 7 7 20 FT WIND GUST.15 10 10 10 10 15 EYE LEVEL WIND..SW 8 W 7 W 6 NW 6 N 7 N 7 EYE LEVEL WIND..15 10 10 10 10 15 MIX HGT (FT)....2000 800 400 500 700 500 HAINES INDEX....5 4 3 2 2 3 VRATE (KT-FT)...200 100 0 0 100 0 .FRIDAY... SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT). TEMPERATURE.........MAX 43. RH..................MIN 38 PERCENT. EYE LEVEL WINDS.....NORTH WINDS 6 TO 11 MPH. WIND (20 FT)........NORTH WINDS 6 TO 11 MPH. TRANSPORT WINDS.....NORTH 13 TO 20 MPH...BECOMING NORTHWEST 7 TO 10 MPH LATE. MIXING HEIGHT.......2400 FT AGL...INCREASING TO 4400 FT AGL BY LATE MORNING. HAINES INDEX........3 TO 5 OR OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH TO OR MODERATE POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. VENTILATION RATE....EXCELLENT (MAX...600). $$ FORECASTER...TILLEY REQUESTED BY...RANDY MCKENZIE TYPE OF REQUEST...PRESCRIBED .TAG 20130404.BIGSE.01/DTX