FNUS73 KFSD 111302 FWSFSD SPOT FORECAST FOR HIEB 2 HFR09...USFWS NATIONAL WEATHER SERVICE SIOUX FALLS SD 802 AM CDT MON MAY 11 2009 IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...SOUTH SURFACE WINDS WILL RULE TODAY AS HIGH PRESSURE IS SITUATED EAST OF THIS AREA. THE SUFACE WINDS MAY BE JUST A LITTLE BIT WEST OF SOUTH THROUGH MIDDAY...BUT OVERALL THE DIRECTION SHOULD STAY FROM ABOUT 180 TO 200 DEGREES. SPEEDS ARE MORE OF AN ISSUE. DUE TO WINDS OFF THE SURFACE AT ABOUT 20 TO 25 MPH...AND A TIGHTENING PRESSURE GRADIENT...THE SURFACE WINDS WILL LIKELY START GUSTING TO BETWEEN 20 AND 25 MPH BY EARLY AFTERNOON. SUSTAINED WINDS SHOULD REMAIN JUST BELOW 20 MPH. THAT BEING SAID...THE RH VALUES WILL NOT FALL TOO LOW...AND SHOULD BOTTOM OUT IN THE LOWER 30S PERCENT BY LATE AFTERNOON. AHEAD OF A COLD FRONT...TUESDAY WILL LIKELY BE MORE WINDY THEN TODAY...WITH FREQUENT GUSTS OF 30 TO 35 MPH. NO PROBLEMS WITH SMOKE DISPERSION TODAY...WITH CONDITIONS GOOD TO EXCELLENT BY LATE MORNING. .TODAY... MAX TEMPERATURE.....68-73. MIN HUMIDITY........33 PERCENT. TIME (CDT) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM SKY.............MCR MCR MCR MCR PC PC PC PC PC PC WEATHER TYPE.... TEMP (F)........45 51 57 61 64 67 67 69 70 70 RH (%)..........76 66 55 48 43 37 36 35 33 33 20 FT WIND DIR..S S S S S S S S S S 20 FT WIND SPD..8 9 12 13 15 16 17 18 18 18 20 FT WIND GUST.10 10 15 15 18 22 23 24 27 25 DISPERSAL INDEX.PR PR FR GD GD EX EX EX EX EX CHC OF PCPN (%).10 10 10 10 10 10 10 10 10 10 MIX HGT (KFT)...0.7 1.2 1.7 2.7 3.7 4.7 4.8 5.0 5.2 3.5 TRANSP WIND DIR.S S SSW S S S S S S S TRANSP WIND SPD.9 13 17 18 20 20 21 21 22 23 HAINES INDEX....5 5 5 5 4 4 4 4 4 4 .TONIGHT... MIN TEMPERATURE.....50-55. MAX HUMIDITY........74 PERCENT. TIME (CDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM SKY.............PCLDY PCLDY PCLDY PCLDY MCLDY MCLDY WEATHER TYPE....NONE NONE NONE NONE NONE NONE TEMP (F)........70 67 62 59 57 55 RH (%)..........34 39 50 55 64 69 20 FT WIND......S 17 S 15 S 14 S 13 S 13 S 13 20 FT WIND GUST.25 20 20 15 15 20 DISPERSAL INDEX.GOOD POOR POOR POOR POOR POOR CHC OF PCPN (%).10 10 10 10 10 10 .TUESDAY... MAX TEMPERATURE.....72-77. MIN HUMIDITY........44 PERCENT. TIME (CDT) 6 AM 9 AM NOON 3 PM SKY.............MCLDY PCLDY PCLDY PCLDY WEATHER TYPE....NONE NONE NONE NONE TEMP (F)........54 61 69 73 RH (%)..........74 60 51 46 20 FT WIND......S 15G20 S 20G30 S 22G30 S 22G30 DISPERSAL INDEX.POOR GOOD EXCEL EXCEL CHC OF PCPN (%).10 10 10 10 MIX HGT (FT)....300 1100 2600 3900 TRANSPORT WIND..S 35 S 38 SSW 36 S 25 HAINES INDEX....3 3 2 3 $$ FORECASTER...MJF REQUESTED BY...CHARLES FROHME TYPE OF REQUEST...PRESCRIBED .TAG 20090511.HIEB2.01/FSD