FNUS73 KFSD 301126 FWSFSD SPOT FORECAST FOR DRY LAKE...USFWS NATIONAL WEATHER SERVICE SIOUX FALLS SD 626 AM CDT MON APR 30 2012 IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION... STRATUS...FOG AND A FAIRLY WEAK SURFACE PRESSURE GRADIENT WILL KEEP MIXING HEIGHTS FAIRLY LOW THIS MORNING...BUT A STRENGTHENING SOUTH TO SOUTHWEST PRESSURE GRADIENT WILL ALLOW FOR DECENT MIXING AND WARMER CONDITIONS THIS AFTERNOON. AS A RESULT...POOR SMOKE DISPERSION WILL CONTINUE THROUGH AT LEAST MID MORNING...BECOMING GOOD BY AROUND NOON...AND EXCELLENT THIS AFTERNOON. ISOLATED TO SCATTERED THUNDERSTORMS ARE POSSIBLE BY EARLY TO MID EVENING. .TODAY... MAX TEMPERATURE.....66-71. MIN HUMIDITY........38 PERCENT. TIME (CDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM SKY COVER.......CDY CDY MC MC MC PC PC PC PC PC PC PC % SKY COVER.....100 100 90 63 54 45 36 38 40 41 43 45 WEATHER COV.....PTY PTY WEATHER TYPE....FOG FOG TEMP............46 47 49 54 59 62 65 66 68 69 69 69 RH..............93 93 92 77 62 53 45 42 39 38 39 42 DEWPOINT........44 45 47 47 46 44 43 42 42 42 43 45 20 FT WIND DIR..S SW SW WSW WSW W W WSW SW SW SSW SSW 20 FT WIND SPD..7 8 8 9 10 12 12 13 12 12 12 10 20 FT WIND GUST. 10 10 10 15 15 15 15 15 15 15 SMOKE DISPERSAL.PR PR PR PR FR GD EX EX EX EX EX EX CHC OF PCPN (%).10 10 0 0 0 0 10 10 10 10 10 10 MIX HGT (KFT)...0.3 0.4 0.6 0.8 1.8 3.4 4.9 5.6 5.8 5.9 5.9 5.9 TRANSP WIND DIR.S SW SW WSW WSW W W W WSW WSW SW SSW TRANSP WIND SPD.8 9 12 13 16 18 20 20 17 16 15 15 HAINES INDEX....4 4 4 4 4 4 4 4 5 5 5 5 .TONIGHT... MIN TEMPERATURE.....52-57. MAX HUMIDITY........93 PERCENT. TIME (CDT) 7 PM 9 PM 11 PM 1 AM 3 AM 5 AM SKY COVER.......PCLDY PCLDY PCLDY PCLDY MCLDY MCLDY % SKY COVER.....47 46 46 46 71 86 WEATHER COV.....CHANCE CHANCE CHANCE S CHC WEATHER TYPE....RNSHWR RNSHWR RNSHWR RNSHWR NONE NONE TEMP............68 63 60 59 57 55 RH..............45 55 62 65 74 86 DEWPOINT........46 47 47 47 49 51 20 FT WIND......S 9 S 9 S 12 S 14 S 15 S 16 20 FT WIND GUST.10 10 15 20 20 25 SMOKE DISPERSAL.EXCEL POOR POOR POOR POOR POOR CHC OF PCPN (%).30 30 30 20 10 10 .TUESDAY... MAX TEMPERATURE.....77-82. MIN HUMIDITY........47 PERCENT. TIME (CDT) 7 AM 10 AM 1 PM 4 PM SKY COVER.......CLOUDY MCLDY MCLDY MCLDY % SKY COVER.....92 73 61 53 WEATHER COV..... CHANCE WEATHER TYPE....NONE NONE NONE RNSHWR TEMP............55 63 74 79 RH..............93 77 58 49 DEWPOINT........53 56 59 58 20 FT WIND......S 16G25 S 21G30 S 22G30 SSW 18G25 SMOKE DISPERSAL.POOR FAIR GOOD EXCEL CHC OF PCPN (%).10 10 10 40 MIX HGT (FT)....300 800 2100 3600 TRANSPORT WIND..S 20 S 33 SSW 29 SSW 23 HAINES INDEX....5 5 5 5 WEATHER TYPE ABBREVIATIONS 1) T = THUNDERSTORMS 2) R = RAIN 3) RW = RAIN SHOWERS 4) L = DRIZZLE 5) ZR = FREEZING RAIN 6) ZL = FREEZING DRIZZLE 7) S = SNOW 8) SW = SNOW SHOWERS 9) IP = ICE PELLETS 10) F = FOG 11) ZF = FREEZING FOG 12) IC = ICE CRYSTALS 13) H = HAZE 14) BS = BLOWING SNOW 15) K = SMOKE 16) BD = BLOWING DUST 17) FR = FROST $$ FORECASTER...CHAPMAN REQUESTED BY...FMS TYPE OF REQUEST...PRESCRIBED .TAG 20120430.DRYLA.01/FSD