FNUS74 KLIX 211217 FWSLIX SPOT FORECAST FOR CPT G-02...U.S. FISH AND WILDLIFE SERVICE NATIONAL WEATHER SERVICE NEW ORLEANS LA 717 AM CDT TUE APR 21 2009 IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...WEAK HIGH PRESSURE OVER THE WESTERN GULF OF MEXICO WILL SLOWLY SLIDE EAST OVER THE CENTRAL GULF OF MEXICO THROUGH TONIGHT. A WEAK COLD FRONT WILL SLOW PUSH THROUGH SOUTHERN MISSISSIPPI...COASTAL MISSISSIPPI AND EAST CENTRAL LOUISIANA TONIGHT. THE SURFACE HIGH OVER THE CENTRAL WILL EVENTUALLY SLIDE OVER THE EASTERN GULF OF MEXICO WEDNESDAY NIGHT AND SOUTHERLY FLOW WILL TAKE HOLD FROM WEDNESDAY NIGHT THROUGH MONDAY. .REMARKS... 1. WHAT ARE THE CHANCES OF RH DROPPING BELOW 28, AND IF SO, FOR WHAT DURATION. SURFACE WINDS UP TO MIXING HEIGHT WILL BECOME MORE WESTERLY THROUGHOUT THE DAY. THIS LOW LEVEL WEST FLOW WILL BRING IN MOISTURE. AS A RESULT...RELATIVE HUMIDITY VALUES SHOULD REMAIN ABOVE 28 PERCENT TODAY. 2. WHAT IS THE FOG POTENTIAL FOR TONIGHT AND TOMORROW MORNING. PATCHY FOG CAN BE EXPECTED WEDNESDAY MORNING. 3. WHAT ARE THE CHANCES OF WIND GOING CALM TONIGHT OR TOMORROW MORNING OBSERVED RH WAS NEAR FULL RECOVERY LAST NIGHT. IT IS VERY LIKELY SURFACE WINDS WILL BECOME CALM AFTER MIDNIGHT THROUGH WEDNESDAY MORNING. 4. ALLOWABLE WIND DIRECTIONS ARE SW, W, AND NW. NEED TO KNOW IF SURFACE OR TRANSPORT WINDS WILL BE OUTSIDE OF THIS WINDOW ANY TIME TODAY, TONIGHT, OR EARLY TOMORROW MORNING. PLEASE ELABORATE ON THE IMPACT THAT THE WEAK COLD FRONT APPROACHING TODAY COULD HAVE ON WIND DIRECTIONS TODAY AND TONIGHT. TRANSPORT AND SURFACE WINDS ARE EXPECTED TO REMAIN WESTERLY THROUGH THIS EVENING. HOWEVER...THE WEAK COLD FRONT...THAT WILL APPROACH THE AREA FROM THE NORTHEAST AROUND MIDNIGHT...WILL SHIFT THE WINDS TO NORTH...NORTHEAST AND THEN EAST 7 AM BY WEDNESDAY MORNING. WINDS WILL BE LIGHT AND OCCASIONALLY CALM. TRANSPORT WINDS WILL REMAIN WESTERLY OVERNIGHT AND WEDNESDAY. SURFACE HIGH IS EXPECTED TO BUILD OVER EAST GULF...PRODUCING A SURFACE SOUTHWEST FLOW OVER THE COASTAL MISSISSIPPI BY LATE WEDNESDAY MORNING AND CONTINUING WEDNESDAY AFTERNOON. 5. SEA BREEZE FRONT TODAY. WEST WINDS A THE SURFACE MAY BE A LITTLE TOO STRONG TO ALLOW A LAND AND SEA TEMPERATURE DIFFERENTIAL TO OCCUR. .TODAY... TIME (CDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM SKY (%).........19 23 33 33 43 36 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE NONE NONE TEMP............43 49 67 73 74 75 RH..............91 80 50 44 46 50 20 FT WIND......W 4 W 5 W 6 W 7 W 7 W 6 20 FT WIND GUST.5 10 10 15 15 10 MIX HGT (FT-AGL)400 2600 6100 6100 8300 6200 MIX HGT (M-AGL).120 790 1860 1860 2530 1890 TRAN WIND (MPH).NW 14 NW 20 W 23 W 23 W 26 W 28 TRAN WIND (M/S).NW 6 NW 9 W 10 W 10 W 12 W 13 CHC OF PCPN (%).0 0 0 0 0 0 .TONIGHT... TIME (CDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM SKY (%).........36 28 21 21 13 9 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE NONE NONE TEMP............73 66 60 58 56 55 RH..............57 73 84 83 86 86 20 FT WIND......W 5 W 4 N 3 NE 2 NE 2 E 2 20 FT WIND GUST.10 5 5 5 5 5 MIX HGT (FT-AGL)6200 2800 400 400 500 700 MIX HGT (M-AGL).1890 850 120 120 150 210 TRAN WIND (MPH).W 28 NW 25 NW 18 NW 18 NW 13 W 13 TRAN WIND (M/S).W 13 NW 11 NW 8 NW 8 NW 6 W 6 CHC OF PCPN (%).0 0 0 0 0 0 .WEDNESDAY... TIME (CDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM SKY (%).........9 4 11 11 4 12 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE NONE NONE TEMP............54 59 68 75 77 77 RH..............90 75 59 50 48 52 20 FT WIND......SE 2 S 2 S 4 SW 5 SW 6 SW 6 20 FT WIND GUST.5 5 5 10 10 10 MIX HGT (FT-AGL)700 2400 5000 5000 7200 6900 MIX HGT (M-AGL).210 730 1520 1520 2190 2100 TRAN WIND (MPH).W 13 W 15 W 15 W 15 W 15 W 16 TRAN WIND (M/S).W 6 W 7 W 7 W 7 W 7 W 7 CHC OF PCPN (%).0 0 0 0 0 0 $$ FORECASTER...NWS NEW ORLEANS REQUESTED BY...SAMI GRAY TYPE OF REQUEST...PRESCRIBED .TAG 20090421.CPTG0.01/LIX