FNUS74 KMOB 061357 FWSMOB SPOT FORECAST FOR FEILD TRIAL 8...FFS NATIONAL WEATHER SERVICE MOBILE AL 757 AM CST WED MAR 6 2013 FORECAST IS BASED ON IGNITION TIME OF 0900 CST ON MARCH 06. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...A STRONG HIGH PRESSURE SYSTEM BUILDS IN FROM THE WEST TODAY. RESULT IS A STRONG SUBSIDENCE INVERSION...KEEPING MIXED LAYERS AROUND 3500 FEET AT BURN LOCATION WHILE A MODERATE TO STRONG NORTHWEST MIXED LAYER FLOW MAKES FOR GOOD DISPERSION. LOWEST HUMIDITY TODAY...NEAR 30 PERCENT. AS AXIS OF THE LARGE SURFACE HIGH EXPANDS EASTWARD FROM THE UPPER MIDWEST DOWN INTO THE GULF...MIXED LAYER NORTHERLY FLOW WEAKENS RESULTING IN FAIR DISPERSION ON THURSDAY. LOWEST HUMIDITY ON THURSDAY SIMILAR AS THAT OF TODAY. FOG POTENTIAL AND OTHER REMARKS...FOG NOT EXPECTED IN THE NEAR TERM. .TODAY... SKY/WEATHER.........SUNNY (0-10 PERCENT). MAX TEMPERATURE.....AROUND 58. MIN HUMIDITY........30 PERCENT. WIND (20 FT)........NORTHWEST WINDS 14 TO 16 MPH. GUSTS 20 TO 25 MPH. MIXING HEIGHT.......INCREASING TO 3500 FT AGL. MIXING WINDS........NORTHWEST 24 TO 28 MPH. DISPERSION INDEX....INCREASING TO 72. (GOOD). LVORI...............1. TIME (CST) 9 AM 11 AM 1 PM 3 PM 5 PM SKY (%)...........2 2 2 12 12 WEATHER COV....... WEATHER TYPE......NONE NONE NONE NONE NONE TEMP..............47 54 57 58 54 RH................43 34 31 31 38 20 FT WIND DIR....NW NW NW NW NW 20 FT WIND SPD....14 14 14 14 14 20 FT WIND GUST...26 26 25 23 23 MIX HGT (FT)......2200 2200 3500 3500 3500 MIX HGT (M).......670 670 1070 1070 1070 TRANSP WIND DIR...NW NW NW NW NW TRANSP WIND SPD...26 26 28 28 28 TRANS SPD (M/S)...12 12 13 13 13 DISPERSION........54 54 72 72 72 LVORI.............1 1 1 1 1 CWR...............0 0 0 0 0 .TONIGHT... SKY/WEATHER.........MOSTLY CLEAR (15-25 PERCENT). MIN TEMPERATURE.....AROUND 32. MAX HUMIDITY........84 PERCENT. WIND (20 FT)........NORTH WINDS 4 TO 8 MPH. MIXING HEIGHT.......1900 FT AGL DECREASING TO 300 FT AGL. MIXING WINDS........NORTH AROUND 20 MPH DECREASING TO 9 MPH IN THE LATE EVENING AND OVERNIGHT. DISPERSION INDEX....13 DECREASING TO 4. (BECOMING VERY POOR). LVORI...............2 INCREASING TO 4. TIME (CST) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM SKY (%)...........20 20 20 20 20 20 WEATHER COV....... WEATHER TYPE......NONE NONE NONE NONE NONE NONE TEMP..............49 44 40 38 35 34 RH................48 61 70 73 78 81 20 FT WIND DIR....NW NW NW NW NW N 20 FT WIND SPD....7 7 5 4 4 4 20 FT WIND GUST...14 14 MIX HGT (FT)......1900 1900 1100 300 300 300 MIX HGT (M).......580 580 340 90 90 90 TRANSP WIND DIR...N N N N N N TRANSP WIND SPD...20 20 13 9 9 9 TRANS SPD (M/S)...9 9 6 4 4 4 DISPERSION........13 13 6 4 4 4 LVORI.............2 2 3 4 4 4 CWR...............0 0 0 0 0 0 .THURSDAY... SKY/WEATHER.........SUNNY (15-25 PERCENT). MAX TEMPERATURE.....AROUND 63. MIN HUMIDITY........29 PERCENT. WIND (20 FT)........LIGHT WINDS BECOMING NORTH AROUND 5 MPH IN THE LATE MORNING AND AFTERNOON. MIXING HEIGHT.......INCREASING TO 3000 FT AGL. MIXING WINDS........NORTH AROUND 10 MPH. DISPERSION INDEX....INCREASING TO 37. (FAIR). LVORI...............4 DECREASING TO 1. TIME (CST) 6 AM 8 AM 10 AM NOON 2 PM 4 PM SKY (%)...........22 22 22 22 22 22 WEATHER COV....... WEATHER TYPE......NONE NONE NONE NONE NONE NONE TEMP..............32 40 53 60 63 61 RH................84 64 41 32 29 33 20 FT WIND DIR....N N N N N N 20 FT WIND SPD....4 4 5 5 5 5 20 FT WIND GUST... MIX HGT (FT)......300 300 1600 3000 3000 3000 MIX HGT (M).......90 90 490 910 910 910 TRANSP WIND DIR...N N N N N N TRANSP WIND SPD...10 10 10 10 10 9 TRANS SPD (M/S)...4 4 4 4 4 4 DISPERSION........10 10 21 37 37 36 LVORI.............4 4 2 1 1 1 CWR...............0 0 0 0 0 0 $$ FORECASTER...10 REQUESTED BY...MARK B TYPE OF REQUEST...PRESCRIBED .TAG 20130306.FEILD.01/MOB