FNUS73 KFSD 201322 FWSFSD SPOT FORECAST FOR DIAMOND LAKE...USFWS NATIONAL WEATHER SERVICE SIOUX FALLS SD 822 AM CDT TUE APR 20 2010 IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION... A LINGERING RIDGE OF HIGH PRESSURE ACROSS THE BURN AREA WILL BRING LIGHT WINDS THROUGH MUCH OF THE DAY...LEADING TO LIGHT AND VARIABLE WINDS AND GENERALLY POOR SMOKE DISPERSION THROUGH THE DAY. WIND DIRECTION WILL BE VERY DIFFICULT TO DETERMINE... AND MAY BE DRIVEN LARGELY BY LOCAL EFFECTS. DRIER AIR WITH THE RIDGE AXIS SHOULD BEGIN TO MIX TO THE SURFACE BY EARLY AFTERNOON. .TODAY... MAX TEMPERATURE.....67-72. MIN HUMIDITY........24 PERCENT. TIME (CDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM SKY COVER.......PC PC PC PC PC PC PC PC PC PC PC MC % SKY COVER.....39 40 40 41 43 44 46 47 48 49 50 51 WEATHER COV..... WEATHER TYPE.... TEMP............45 46 52 58 64 67 68 70 70 70 70 69 RH..............65 76 60 46 36 31 28 26 24 24 24 25 DEWPOINT........33 39 38 38 36 35 33 32 32 31 31 32 20 FT WIND DIR..SW SSW SW SW SW WSW WSW SW SW SW WSW WNW 20 FT WIND SPD..2 2 3 3 3 2 2 2 2 2 2 3 20 FT WIND GUST. 5 5 5 5 5 SMOKE DISPERSAL.PR PR PR PR PR PR PR PR FR FR FR PR CHC OF PCPN (%).0 0 0 0 0 0 0 0 0 0 0 0 MIX HGT (KFT)...0.3 0.5 0.8 1.1 2.8 4.5 6.2 6.4 6.6 6.7 5.6 4.4 TRANSP WIND DIR.SW SW SW SW SW SW SW SW SW SW WSW W TRANSP WIND SPD.1 2 3 3 3 2 2 2 3 3 3 3 HAINES INDEX....5 5 5 5 5 6 6 6 6 6 6 6 .TONIGHT... MIN TEMPERATURE.....41-46. MAX HUMIDITY........83 PERCENT. TIME (CDT) 7 PM 9 PM 11 PM 1 AM 3 AM 5 AM SKY COVER.......MCLDY MCLDY PCLDY PCLDY PCLDY PCLDY % SKY COVER.....52 51 50 48 42 35 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE NONE NONE TEMP............66 57 50 48 46 44 RH..............28 45 61 67 76 82 DEWPOINT........32 36 38 38 39 39 20 FT WIND......NW 5 WNW 6 W 5 W 5 W 3 WNW 3 20 FT WIND GUST. 5 5 CHC OF PCPN (%).0 0 0 10 10 10 .WEDNESDAY... MAX TEMPERATURE.....66-71. MIN HUMIDITY........31 PERCENT. TIME (CDT) 7 AM 10 AM 1 PM 4 PM SKY COVER.......PCLDY PCLDY PCLDY PCLDY % SKY COVER.....28 28 27 36 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE TEMP............45 58 66 69 RH..............80 55 38 31 DEWPOINT........39 41 40 37 20 FT WIND......W 8G10 WNW 8G10 NW 7 NW 6 SMOKE DISPERSAL.POOR POOR FAIR GOOD CHC OF PCPN (%).10 10 10 10 MIX HGT (FT)....300 800 6700 7700 TRANSPORT WIND..W 9 WNW 14 NNW 5 NW 6 HAINES INDEX....4 5 6 6 $$ FORECASTER...CHAPMAN REQUESTED BY...CHAD LORETH TYPE OF REQUEST...PRESCRIBED .TAG 20100420.DIAMO.01/FSD