FNUS74 KMOB 271432 FWSMOB SPOT FORECAST FOR DESOTO 0920...U.S. FOREST SERVICE NATIONAL WEATHER SERVICE MOBILE AL 832 AM CST TUE JAN 27 2009 FORECAST IS BASED ON IGNITION TIME OF 1000 CST ON JANUARY 27. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...A WARM AND MOIST AIRMASS WILL REMAIN IN PLACE ACROSS THE REGION TODAY AND TONIGHT WITH AREAS OF DENSE FOG DISSIPATING BY MID MORNING AND REFORMING AGAIN TONIGHT. A COLD FRONT WILL BEGIN MOVING EAST ACROSS THE AREA LATE TONIGHT AND THEN BE EAST OF THE REGION BY LATE WEDNESDAY. SCATTERED TO NUMEROUS SHOWERS AND A FEW ISOLATED THUNDERSTORMS WILL ACCOMPANY THE FRONTAL PASSAGE ON WEDNESDAY. DRIER AND MUCH COOLER CONDITIONS WILL RETURN TO THE REGION IN THE WAKE OF THE FRONT DURING THE LATE PART OF THE WEEK AS HIGH PRESSURE BUILDS OVER THE AREA. .TODAY... SKY/WEATHER.........PARTLY SUNNY (60-70 PERCENT). AREAS OF DENSE FOG IN THE MORNING. TEMPERATURE.........64 AT IGNITION...MAX 77. RH..................80 PERCENT AT IGNITION...MIN 57 PERCENT. WIND (20 FT)........WINDS SOUTH AT 5 MPH AT IGNITION...OTHERWISE SOUTH 5 TO 9 MPH. MIXING HEIGHT.......100 FT AGL INCREASING TO 2200-2400 FT AGL THEN 2900 FT AGL LATE IN THE MORNING INCREASING TO 3600 FT AGL IN THE AFTERNOON DECREASING TO 300 FT AGL BY EARLY EVENING. MIXING WINDS........SOUTHEAST 6 TO 8 MPH INCREASING TO SOUTH 10 TO 14 MPH IN THE LATE MORNING AND AFTERNOON. DISPERSION INDEX....16 INCREASING TO 28 LATE IN THE MORNING INCREASING TO 33 IN THE AFTERNOON. LVORI...............10 DECREASING TO 3 LATE IN THE MORNING DECREASING TO 1 IN THE AFTERNOON. TIME (CST) 10 AM NOON 2 PM 4 PM 6 PM 8 PM SKY (%).........75 60 60 60 84 84 WEATHER COV..... AREAS AREAS WEATHER TYPE....NONE NONE NONE NONE FOG FOG TEMP............64 74 76 73 67 64 RH..............80 60 57 63 79 87 20 FT WIND DIR..SE S S S S S 20 FT WIND SPD..5 8 8 7 5 5 MIX HGT (FT)....2900 3400 3600 3300 300 300 MIX HGT (M).....880 1040 1100 1010 90 90 TRANSP WIND DIR.SE S S S S S TRANSP WIND SPD.10 14 13 12 9 9 TRANS SPD (M/S).5 6 6 5 4 4 DISPERSION......28 35 35 29 5 6 LVORI...........3 1 1 2 4 5 CWR.............10 10 10 10 20 20 .TONIGHT... SKY/WEATHER.........CLOUDY (85-95 PERCENT). AREAS OF FOG IN THE EVENING...THEN PATCHY FOG AFTER MIDNIGHT. SLIGHT CHANCE OF SHOWERS IN THE EVENING...THEN CHANCE OF SHOWERS AFTER MIDNIGHT. TEMPERATURE.........MIN 56. RH..................MAX 90 PERCENT. WIND (20 FT)........SOUTH WINDS 6 TO 7 MPH. MIXING HEIGHT.......300 FT AGL. MIXING WINDS........SOUTH 9 TO 10 MPH. DISPERSION INDEX....7. LVORI...............4 INCREASING TO 5 EARLY IN THE EVENING...THEN INCREASING TO 6 LATE IN THE EVENING DECREASING TO 5 AFTER MIDNIGHT DECREASING TO 4. .WEDNESDAY... SKY/WEATHER.........CLOUDY (90-100 PERCENT). RAIN SHOWERS LIKELY IN THE MORNING...THEN RAIN SHOWERS IN THE AFTERNOON. TEMPERATURE.........MAX 56. RH..................MIN 82 PERCENT. WIND (20 FT)........SOUTHWEST WINDS 7 TO 8 MPH SHIFTING TO THE NORTH 8 TO 10 MPH IN THE LATE MORNING AND AFTERNOON. MIXING HEIGHT.......300 FT AGL INCREASING TO 2100-2300 FT AGL UNTIL LATE AFTERNOON...THEN DECREASING TO 2000 FT AGL LATE IN THE AFTERNOON DECREASING TO 300 FT AGL LATE IN THE AFTERNOON. MIXING WINDS........WEST 10 TO 13 MPH SHIFTING TO THE NORTH 12 TO 15 MPH IN THE LATE MORNING AND AFTERNOON...THEN DECREASING TO AROUND 10 MPH LATE IN THE AFTERNOON. DISPERSION INDEX....10 INCREASING TO 26...THEN DECREASING TO 5 LATE IN THE AFTERNOON. LVORI...............4 DECREASING TO 3 LATE IN THE AFTERNOON...THEN INCREASING TO 5 LATE IN THE AFTERNOON. $$ FORECASTER...MOB FORECASTER REQUESTED BY...BUZZ WILLIAMS TYPE OF REQUEST...PRESCRIBED .TAG 20090127.DESOT.02/MOB