FNUS72 KCAE 122111 FWSCAE SPOT FORECAST FOR RCW4...NATIONAL PARK SERVICE NATIONAL WEATHER SERVICE COLUMBIA SC 511 PM EDT TUE APR 12 2011 FORECAST IS BASED ON IGNITION TIME OF 0800 EDT ON APRIL 13. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION... UPDATE FOR FOG POTENTIAL LATER THIS WEEK. DRYING WILL OCCUR BEHIND A COLD FRONT TONIGHT. THE DRYING PLUS WIND SHOULD HELP PREVENT FOG DURING THE EARLY MORNING HOURS WEDNESDAY. THE COMBINATION OF LOW PRESSURE OVER THE MIDDLE ATLANTIC STATES PLUS A RIDGE IN THE MISSISSIPPI RIVER VALLEY WILL RESULT IN WEST TO NORTHWEST WINDS TONIGHT AND WEDNESDAY. THE WINDS WILL BECOME LIGHT AS THE RIDGE GETS CLOSER TO THE AREA AND THE PRESSURE GRADIENT RELAXES WEDNESDAY NIGHT. THE RIDGE WILL MOVE OFF THE COAST THURSDAY AFTERNOON. WINDS THURSDAY WILL BE NORTHEAST BUT VEER TO SOUTHEAST AT SPEEDS MAINLY LESS THAN 10 MPH THURSDAY. FOG MAY OCCUR DURING THE EARLY MORNING HOURS THURSDAY AND FRIDAY BECAUSE OF AN INCREASE IN LOW-LEVEL MOISTURE IN AN ONSHORE FLOW. ***LAVORI FORECAST*** EXPECT LAVORI VALUES NEAR 4 LATE WEDNESDAY NIGHT AND AROUND 6 EARLY THURSDAY MORNING. LAVORI VALUES WILL LIKELY BE HIGHER DURING THE THURSDAY NIGHT AND FRIDAY MORNING PERIOD. WINDS WILL BE LIGHT WITH AN EASTERLY COMPONENT SO LOW-LEVEL MOISTURE WILL BE ON THE INCREASE FROM THE ATLANTIC. ********************** .TONIGHT... TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM SKY (%)..............67 64 63 63 63 54 37 19 10 5 5 5 WEATHER COV.......... WEATHER TYPE......... TEMP.................75 72 68 63 60 58 56 55 53 52 50 49 RH...................40 42 49 58 62 67 69 69 71 74 77 80 20 FT WIND DIR.......W W W W W W W NW NW W W W 20 FT WIND DIR.......260 270 270 280 280 280 290 300 300 290 280 270 20 FT WIND SPD.......11 10 7 6 5 3 3 3 2 2 2 2 20 FT WIND GUST......20 20 15 10 10 5 5 5 5 5 5 5 MIX HGT (KFT)........5.1 3.2 1.6 1.0 0.7 0.6 0.6 0.6 0.6 0.6 0.6 0.6 TRANSP WIND DIR......W W W W W W W NW NW NW NW NW TRANSP WIND SPD......26 25 16 15 13 12 10 9 8 7 7 7 .WEDNESDAY... TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM SKY (%)..............4 4 4 1 2 2 3 3 3 3 4 5 WEATHER COV.......... WEATHER TYPE......... TEMP.................49 48 50 55 61 66 69 71 73 75 76 76 RH...................80 83 77 61 48 40 36 34 31 29 28 28 20 FT WIND DIR.......W W NW NW NW NW NW NW NW NW NW NW 20 FT WIND DIR.......280 290 300 300 310 310 310 300 300 300 300 300 20 FT WIND SPD.......2 2 3 4 5 5 6 5 5 5 6 5 20 FT WIND GUST......5 5 5 5 10 10 10 10 10 10 10 10 MIX HGT (KFT)........1.0 1.7 2.4 2.9 3.3 3.6 3.9 4.0 4.1 4.0 3.8 3.5 TRANSP WIND DIR......W W W W NW NW NW NW NW NW NW NW TRANSP WIND SPD......7 7 7 8 9 9 10 12 12 10 9 8 .FORECAST DAYS 3 THROUGH 5... .THURSDAY...MOSTLY CLEAR. FOG MAY OCCUR DURING THE MORNING. LOWS IN THE UPPER 40S. HIGHS IN THE UPPER 70S. LIGHT NORTHEAST WINDS BECOMING SOUTHEAST 5 TO 10 MPH. .FRIDAY...MOSTLY CLOUDY. FOG MAY OCCUR DURING THE MORNING. A SLIGHT CHANCE OF SHOWERS. LOWS IN THE LOWER 50S. HIGHS IN THE UPPER 70S. SOUTHEAST WINDS AROUND 5 MPH. .SATURDAY...MOSTLY CLOUDY. A CHANCE OF SHOWERS AND THUNDERSTORMS. LOWS IN THE LOWER 60S. HIGHS IN THE UPPER 70S. SOUTH WINDS AROUND 8 MPH. .SUNDAY... MOSTLY CLEAR. A CHANCE OF SHOWERS AND THUNDERSTORMS. LOWS IN THE UPPER 40S. HIGHS IN THE LOWER 70S. WEST WINDS AROUND 8 MPH. $$ FORECASTER...LINTON REQUESTED BY...SASHA ERNST TYPE OF REQUEST...PRESCRIBED .TAG 20110413.RCW4_.01/CAE