FNUS73 KFSD 041025 FWSFSD SPOT FORECAST FOR BOYD S BEND...PLYMOUTH COUNTY CONSERVATION NATIONAL WEATHER SERVICE SIOUX FALLS SD 525 AM CDT WED APR 4 2012 IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION... SURFACE HIGH PRESSURE WILL MOVE EASTWARD ACROSS ONTARIO TODAY...WITH AN UPPER LEVEL LOW FOUND ACROSS THE SOUTHERN PLAINS. THE SURFACE HIGH WILL GIVE NORTHEAST WINDS EARLY TODAY...GRADUALLY VEERING TO THE EAST BY MIDDAY. WIND SPEEDS SHOULD BE MODERATE...INCREASING TO THE 13 TO 20 MPH RANGE IN THE LATE MORNING AND AFTERNOON. NO RAIN IS EXPECTED AS FAR NORTH AS PLYMOUTH COUNTY...BUT IT WILL PROBABLY REMAIN MOSTLY CLOUDY THROUGH THE DAY. IF THICKER CLOUD COVER REMAINS PREVALENT THIS AFTERNOON...LOWER 60S FOR HIGHS MAY BE TOUGH TO REACH. AND IF THAT HAPPENS...YOUR MINIMUM HUMIDITY VALUES WILL PROBABLY BE CLOSER TO 35 TO 40 PERCENT INSTEAD OF 31 PERCENT. MIXING HEIGHTS ARE FAIRLY HIGH TODAY DESPITE THE CLOUD COVER DUE TO LOW LEVEL DRY AIR. THEREFORE SMOKE DISPERSION SHOULD NOT BE A PROBLEM. ON THURSDAY... WINDS WILL BE FROM THE SOUTHEAST INCREASING TO 15 TO 20 MPH BY AFTERNOON. MINIMUM HUMIDITY VALUES ON THURSDAY SHOULD DROP TO ABOUT 25 TO 30 PERCENT. .TODAY... MAX TEMPERATURE.....60-65. MIN HUMIDITY........31 PERCENT. TIME (CDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM SKY COVER.......MC MC MC MC MC MC MC MC MC MC MC MC % SKY COVER.....83 81 78 75 72 70 67 68 70 72 73 75 WEATHER COV..... WEATHER TYPE.... TEMP............46 46 48 52 55 57 58 60 61 63 63 63 RH..............53 56 54 48 43 40 39 36 33 31 31 31 DEWPOINT........30 31 32 33 33 33 33 33 32 32 32 32 20 FT WIND DIR..NE ENE ENE ENE ENE E E E E E E E 20 FT WIND SPD..7 9 12 13 13 13 13 14 15 15 14 12 20 FT WIND GUST. 10 15 15 15 15 15 20 20 20 20 15 SMOKE DISPERSAL.PR PR FR GD GD GD GD GD GD EX EX EX CHC OF PCPN (%).10 10 10 10 10 10 10 10 10 10 10 10 MIX HGT (KFT)...0.3 0.8 1.3 1.9 2.3 2.8 3.2 3.5 3.9 4.3 4.4 4.6 TRANSP WIND DIR.NE ENE ENE E E E E E E E E E TRANSP WIND SPD.8 14 18 22 22 21 20 20 21 21 21 21 HAINES INDEX....3 3 3 3 3 3 3 3 4 4 4 4 .TONIGHT... MIN TEMPERATURE.....41-46. MAX HUMIDITY........70 PERCENT. TIME (CDT) 7 PM 9 PM 11 PM 1 AM 3 AM 5 AM SKY COVER.......MCLDY MCLDY MCLDY MCLDY MCLDY MCLDY % SKY COVER.....76 79 82 85 80 76 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE NONE NONE TEMP............62 59 55 52 49 46 RH..............32 37 45 50 58 65 DEWPOINT........32 33 34 34 35 35 20 FT WIND......E 10 E 9 E 9 ESE 9 E 9 E 9 20 FT WIND GUST.15 10 10 10 10 10 SMOKE DISPERSAL.EXCEL FAIR POOR POOR POOR POOR CHC OF PCPN (%).10 10 10 10 10 10 .THURSDAY... MAX TEMPERATURE.....60-65. MIN HUMIDITY........27 PERCENT. TIME (CDT) 7 AM 9 AM 11 AM 1 PM 3 PM 5 PM SKY COVER.......MCLDY MCLDY MCLDY PCLDY PCLDY PCLDY % SKY COVER.....72 62 53 43 41 38 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE NONE NONE TEMP............44 49 55 59 62 63 RH..............70 58 43 36 30 27 DEWPOINT........35 35 33 32 30 29 20 FT WIND......E 9 ESE 10 ESE 13 SE 14 SE 15 SE 15 20 FT WIND GUST.10 15 15 20 20 20 SMOKE DISPERSAL.POOR FAIR GOOD GOOD EXCEL EXCEL CHC OF PCPN (%).0 0 0 0 0 0 MIX HGT (FT)....300 1200 2300 3700 4600 4900 TRANSPORT WIND..E 10 ESE 17 SE 20 SE 18 SE 18 SE 20 HAINES INDEX....3 3 3 3 4 4 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...MJF REQUESTED BY...DENNIS L SOHL TYPE OF REQUEST...PRESCRIBED .TAG 20120404.BOYDS.01/FSD