FNUS74 KHGX 191320 FWSHGX SPOT FORECAST FOR SARGENT EAST...U. S. FISH AND WILDLIFE SERVICE NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 720 AM CST THU JAN 19 2012 IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION... ONSHORE WINDS WILL BRING AN INCREASE IN LOW LEVEL MOISTURE. UNSEASONABLY WARM TEMPERATURES ARE EXPECTED TODAY AND AGAIN FRIDAY. AREAS OF SEA FOG WILL BE POSSIBLE BEGINNING AS EARLY AS TONIGHT. THE SEA FOG COULD PLAGUE THE AREA THROUGH SUNDAY. MIXING HEIGHTS WILL REMAIN ON THE LOW SIDE AS A TEMPERATURE INVERSION DEVELOPS AROUND 3000 FEET. COMMENTS: A TEMPERATURE INVERSION SHOULD KEEP MIXING HEIGHTS BETWEEN 2000 AND 3000 FEET THIS AFTERNOON. DESPITE THE LOW MIXING HEIGHTS...TRANSPORT WINDS BE FAIRLY ROBUST...BETWEEN 20 AND 25 KNOTS. SURFACE DEW POINTS WILL CONTINUE TO CLIMB AND RH VALUES WILL BE RELATIVELY HIGH TODAY AND VERY HIGH OVERNIGHT. THERE WILL BE SOME PATCHY FOG THIS MORNING. THERE IS ALSO SOME POTENTIAL FOR SEA FOG OVERNIGHT INTO FRIDAY MORNING. YOUR BURN LOCATION IS FURTHER SOUTH AND SHELF WATERS ARE A BIT WARMER OFF OF MATAGORDA COUNTY SO NOT SURE IF THE FOG THREAT WILL BE AS HIGH AS POINTS TO THE NORTH. MODEL GUIDANCE IS AGGRESSIVE WITH FOG POTENTIAL OVERNIGHT BUT WITH SOUTH TO SOUTHWEST SURFACE WINDS...FEEL THE TRAJECTORY OF SEA FOG MOVING INLAND IS UNFAVORABLE. THERE IS A GREAT DEAL OF DRY AIR ABOVE THE INVERSION LAYER. SINCE TRANSPORT WINDS ARE ARE SO ROBUST...SOME MIXING OF THE DRY LAYER COULD HELP ERODE THE CLOUD DECK AND PRODUCE A BIT MORE SUNSHINE THIS AFTERNOON. IF THIS OCCURS...MIXING HEIGHTS WILL BE HIGHER THAN FORECAST. HYSPLIT MODEL WILL BE SENT SHORTLY...BUT THE TRAJECTORY OF THE PLUME WILL MOVE OVER SOUTHEAST HOUSTON. WILL RUN THE MODEL AGAIN WITH SLIGHTLY DIFFERENT PARAMETERS AND SEND THAT AS WELL. .TODAY... TIME (CST) 8 AM 10 AM NOON 2 PM 4 PM SKY (%).........MCLDY MCLDY MCLDY MCLDY PCLDY WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE NONE TEMP............54 59 65 67 67 RH..............100 100 87 84 87 20FT WIND DIR...S S S S S 20FT WIND (MPH).7 9 10 13 12 20FT WIND GUST.. 10 15 15 15 MIX HGT (FT)....1400 1800 2100 2300 2300 MIX HGT (M).....430 550 640 700 700 TRANS WIND DIR..190 190 200 200 200 TRANS SPD (KTS).12 13 14 15 15 TRANS SPD (M/S).6 7 7 8 8 CWR.............10 10 10 10 10 .TONIGHT... TIME (CST) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM SKY (%).........PCLDY MCLDY MCLDY MCLDY MCLDY MCLDY WEATHER COV.....PATCHY PATCHY PATCHY AREAS AREAS AREAS WEATHER TYPE....FOG FOG FOG FOG FOG FOG TEMP............63 63 61 61 60 59 RH..............97 97 100 97 96 100 20FT WIND DIR...S S S S S S 20FT WIND (MPH).8 8 10 12 10 8 20FT WIND GUST..10 10 15 15 15 10 MIX HGT (FT)....2100 1700 1400 1000 700 500 MIX HGT (M).....640 520 430 300 210 150 TRANS WIND DIR..200 200 200 200 200 200 TRANS SPD (KTS).15 15 14 13 13 13 TRANS SPD (M/S).8 8 7 7 7 7 CWR.............10 10 10 10 10 10 $$ FORECASTER...ROESELER REQUESTED BY...DAVID CHISOLM TYPE OF REQUEST...PRESCRIBED .TAG 20120119.SARGE.01/HGX