FNUS74 KMOB 131201 FWSMOB SPOT FORECAST FOR C-23...U.S. FOREST SERVICE NATIONAL WEATHER SERVICE MOBILE AL 701 AM CDT WED MAR 13 2013 FORECAST IS BASED ON IGNITION TIME OF 0900 CDT ON MARCH 13. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. ...RED FLAG WARNING IN EFFECT FROM 1 PM THIS AFTERNOON TO 6 PM CDT THIS EVENING... ...FIRE WEATHER WATCH IN EFFECT THURSDAY AFTERNOON... .DISCUSSION...HIGH PRESSURE BUILDING FROM THE CENTRAL PLAINS TO THE LOWER MISSISSIPPI VALLEY WILL BRING A MUCH DRIER AIRMASS AND INCREASED NORTHWESTERLY WINDS TO THE REGION TODAY. CRITICALLY LOW RELATIVE HUMIDITY FOR AROUND 4 HOURS IS EXPECTED ACROSS SOUTHWEST AND SOUTH CENTRAL ALABAMA...WHILE CRITICALLY LOW RELATIVE HUMIDITY COMBINED WITH BREEZY NORTHWESTERLY WINDS AND ERC VALUES AROUND 30 IS EXPECTED ACROSS THE WESTERN FLORIDA PANHANDLE. THESE CONDITIONS WILL BRING CRITICAL FIRE WEATHER CONDITIONS TO THESE LOCATIONS THIS AFTERNOON. RELATIVE HUMIDITY MAY FALL TO JUST BELOW CRITICAL LEVELS OVER SOUTHEAST MISSISSIPPI THIS AFTERNOON...BUT 20 FOOT WIND SPEEDS MAY BE JUST SHY OF CRITICAL FIRE WEATHER CRITERIA THERE. DISPERSIONS ARE EXPECTED TO INCREASE ABOVE 75 ACROSS A GOOD PORTION OF THE REGION THIS AFTERNOON GIVEN INCREASED NORTHWEST FLOW THROUGH THE MIXED LAYER. A LONG DURATION OF CRITICALLY LOW RELATIVE HUMIDITY WILL BE POSSIBLE OVER PORTIONS OF SOUTH CENTRAL ALABAMA AGAIN THURSDAY AFTERNOON. FOG POTENTIAL AND OTHER REMARKS...NO FOG IS EXPECTED. .TODAY... SKY/WEATHER.........SUNNY (0-5 PERCENT). MAX TEMPERATURE.....AROUND 68. MIN HUMIDITY........22 PERCENT. WIND (20 FT)........NORTH WINDS AROUND 5 MPH EARLY IN THE MORNING BECOMING LIGHT...THEN BECOMING NORTH AROUND 9 MPH LATE IN THE MORNING INCREASING TO NORTHWEST 13 TO 16 MPH. MIXING HEIGHT.......200 FT AGL INCREASING TO 5500-5700 FT AGL. MIXING WINDS........NORTHWEST 4 TO 6 MPH INCREASING TO 18 TO 22 MPH IN THE LATE MORNING AND AFTERNOON. DISPERSION INDEX....5 INCREASING TO 70. LVORI...............5 DECREASING TO 1. TIME (CDT) 9 AM 11 AM 1 PM 3 PM 5 PM SKY (%)...........0 0 0 0 0 WEATHER COV....... WEATHER TYPE......NONE NONE NONE NONE NONE TEMP..............50 60 65 66 64 RH................56 37 25 22 23 20 FT WIND DIR....N N NW NW NW 20 FT WIND SPD....3 8 12 12 14 20 FT WIND GUST... 15 20 20 22 MIX HGT (FT)......200 3000 5700 5700 5500 MIX HGT (M).......60 910 1740 1740 1680 TRANSP WIND DIR...NW N NW NW NW TRANSP WIND SPD...6 18 21 21 22 TRANS SPD (M/S)...3 8 9 9 10 DISPERSION........6 59 67 67 70 LVORI.............3 1 1 1 1 CWR...............0 0 0 0 0 .TONIGHT... SKY/WEATHER.........CLEAR (0-10 PERCENT). MIN TEMPERATURE.....AROUND 31. MAX HUMIDITY........73 PERCENT. WIND (20 FT)........NORTHWEST WINDS AROUND 16 MPH BECOMING LIGHT. MIXING HEIGHT.......5500 FT AGL DECREASING TO 400-500 FT AGL. MIXING WINDS........NORTHWEST AROUND 22 MPH BECOMING NORTH AROUND 8 MPH. DISPERSION INDEX....70 DECREASING TO 5. LVORI...............1 INCREASING TO 3. TIME (CDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM SKY (%)...........0 5 5 5 5 5 WEATHER COV....... WEATHER TYPE......NONE NONE NONE NONE NONE NONE TEMP..............61 52 43 39 36 34 RH................26 39 57 64 69 69 20 FT WIND DIR....NW N NW NW N N 20 FT WIND SPD....14 10 5 5 4 4 20 FT WIND GUST...22 17 MIX HGT (FT)......5500 2200 900 900 500 400 MIX HGT (M).......1680 670 270 270 150 120 TRANSP WIND DIR...NW NW NW NW N N TRANSP WIND SPD...22 16 14 14 13 8 TRANS SPD (M/S)...10 7 6 6 6 4 DISPERSION........70 22 6 6 6 4 LVORI.............1 2 3 3 3 3 CWR...............0 0 0 0 0 0 $$ FORECASTER...32 REQUESTED BY...MICHAEL HEARD TYPE OF REQUEST...PRESCRIBED .TAG 20130313.C23__.01/MOB