FNUS74 KHGX 161103 FWSHGX SPOT FORECAST FOR SHNF C-19...USFS NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 603 AM CDT SAT MAR 16 2013 IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION... AN EARLY MORNING LOW-LEVEL INVERSION ALOFT WILL BREAK AROUND 9 OR 10 AM. SURFACE WINDS OF 10 TO 15 MPH THIS MORNING WILL NOT BE CONDUCIVE FOR FOG DEVELOPMENT. THE WINDS MAY BE A BIT LOWER TONIGHT AND EARLY SUNDAY MORNING.. BUT WILL LIKELY STILL BE TOO HIGH FOR FOG DEVELOPMENT. A TIGHT SURFACE PRESSURE GRADIENT WILL HELP LEAD TO MODERATE TO STRONG TRANSPORT WINDS TODAY. SURFACE WINDS WILL BE CLOSE TO 15 MPH WITH GUSTS TO 20 MPH POSSIBLE...MAINLY FROM THE MID MORNING THROUGH THE LATE AFTERNOON. A STRONG TEMPERATURE INVERSION ALOFT WILL LIMIT THE MIXING HEIGHT TO BETWEEN 5000 AND 5500 FEET MAXIMUM THIS AFTERNOON. TRANSPORT WINDS WILL LIKELY BE LOWER ON SUNDAY AND WARMER SURFACE TEMPERATURES WILL HELP THE RAISE THE MIXING HEIGHTS. NOTE...FOG CHANCES ARE EXPRESSED IN TERMS OF FOG POTENTIAL. A FOG POTENTIAL OF LOW IS A FORECAST FOR VISIBILITY OF 7 MILES OR GREATER...MODERATE IS FOR VISIBILITY FORECAST OF 4 TO 6 MILES... WHILE HIGH IS FOR A VISIBILITY FORECAST OF 3 MILES OR LOWER. .TODAY... TIME (CDT) 11 AM 1 PM 3 PM 5 PM SKY (%).........PCLDY PCLDY PCLDY PCLDY WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE TEMP............68 75 78 78 RH..............63 50 45 43 20FT WIND DIR...S S S S 20FT WIND (MPH).13 16 16 15 20FT WIND GUST..20 25 25 20 MIX HGT (FT)....3100 4700 5300 5000 MIX HGT (M).....940 1430 1620 1520 TRANS WIND DIR..200 200 190 180 TRANS SPD (KTS).31 28 28 29 TRANS SPD (M/S).16 14 14 15 CWR.............0 0 0 0 VENT RATE.......15997 20467 22966 22520 CATEGORY DAY....4 5 5 5 FOG POTENTIAL...LOW LOW LOW LOW .TONIGHT... TIME (CDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM SKY (%).........PCLDY PCLDY PCLDY MCLDY MCLDY MCLDY WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE NONE NONE TEMP............76 71 67 65 63 61 RH..............46 55 69 77 86 92 20FT WIND DIR...S S S S S S 20FT WIND (MPH).15 14 13 12 12 10 20FT WIND GUST..20 20 20 20 15 15 MIX HGT (FT)....4600 3300 1900 1700 1800 1700 MIX HGT (M).....1400 1010 580 520 550 520 TRANS WIND DIR..180 180 170 170 170 180 TRANS SPD (KTS).30 30 29 30 29 25 TRANS SPD (M/S).15 15 15 15 15 13 CWR.............0 0 0 0 0 0 VENT RATE.......20535 15318 8833 8281 8053 6920 CATEGORY DAY....5 4 4 4 4 4 FOG POTENTIAL...LOW LOW LOW LOW LOW LOW .SUNDAY... TIME (CDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM SKY (%).........MCLDY MCLDY MCLDY MCLDY MCLDY MCLDY WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE NONE NONE TEMP............60 61 67 74 78 80 RH..............95 92 75 59 52 49 20FT WIND DIR...S S S S S S 20FT WIND (MPH).8 8 10 12 12 10 20FT WIND GUST..15 15 15 15 15 15 MIX HGT (FT)....1700 2000 2700 4200 5600 6200 MIX HGT (M).....520 610 820 1280 1710 1890 TRANS WIND DIR..180 180 180 190 190 200 TRANS SPD (KTS).22 21 22 23 22 20 TRANS SPD (M/S).11 11 11 12 11 10 CWR.............0 10 10 10 10 10 VENT RATE.......6014 6603 9480 15432 19193 19020 CATEGORY DAY....3 3 4 4 5 5 FOG POTENTIAL...LOW LOW LOW LOW LOW LOW $$ FORECASTER...LEWIS REQUESTED BY...JASON KLAWINSKY TYPE OF REQUEST...PRESCRIBED .TAG 20130316.SHNFC.01/HGX