FNUS73 KFSD 111339 FWSFSD SPOT FORECAST FOR PURRINGTON...MN DNR NATIONAL WEATHER SERVICE SIOUX FALLS SD 839 AM CDT MON MAY 11 2009 IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...HIGH PRESSURE WILL BE SITUATED EAST OF THIS AREA TODAY... WHICH WILL PROVIDE A SOUTHERLY SUFACE WIND...PROBABLY SHIFTING TO THE SOUTH TO SOUTHWEST BY MIDDAY AND THROUGH MID AFTERNOON. BY LATE IN THE DAY...THE SURFACE MAY START GUSTING JUST ABOVE 20 MPH DUE TO A TIGHTENING SURFACE PRESSURE GRADIENT AND SOME STRONGER WINDS ALOFT MOVING IN FROM THE WEST. OTHERWISE WE ARE LOOKING AT A PRETTY TYPICAL SPRING WEATHER DAY...AND WITH SOME DRY AIR AROUND RH VALUES WILL PROBABLY START DROPPING TO NEAR 30 PERCENT BY MID AFTERNOON. SMOKE DISPERSION WILL BE GOOD TO EXCELLENT BY MIDDAY WITH SMOKE DRIFTING FROM SOUTH TO SOUTHWEST TO THE NORTH TO NORTHEAST. TUESDAY WILL BE A WINDIER DAY AS A COLD FRONT WILL BE SITUATED TO OUR WEST...HELPING TO KICK THE WINDS UP A NOTCH OR TWO IN THIS AREA. WINDS WILL BE STILL BE FROM THE SOUTH ON TUESDAY...BUT WILL BE WINDY WITH FREQUENT GUSTS TO 30 TO 35 MPH IN THE AFTERNOON. .TODAY... MAX TEMPERATURE.....67-72. MIN HUMIDITY........28 PERCENT. TIME (CDT) 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM SKY.............PC PC PC PC PC PC PC PC PC WEATHER TYPE.... TEMP (F)........52 57 60 62 65 66 67 69 69 RH (%)..........56 47 42 36 31 30 30 28 28 DEWPOINT (F)....37 37 37 35 34 34 35 35 35 20 FT WIND DIR..SSW S S SSW SSW SSW S S S 20 FT WIND SPD..8 12 13 12 12 13 14 16 16 20 FT WIND GUST.10 15 15 15 15 15 20 22 23 DISPERSAL INDEX.PR PR FR GD GD GD EX EX GD CHC OF PCPN (%).10 10 10 10 10 10 10 10 10 MIX HGT (KFT)...1.2 1.6 2.7 3.7 4.7 5.0 5.2 5.5 3.8 TRANSP WIND DIR.SSW S SSW SSW SSW SSW SSW SSW SSW TRANSP WIND SPD.9 10 10 10 12 14 16 18 21 HAINES INDEX....5 5 5 5 5 5 5 5 5 .TONIGHT... MIN TEMPERATURE.....48-53. MAX HUMIDITY........66 PERCENT. TIME (CDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM SKY.............PCLDY PCLDY PCLDY PCLDY PCLDY MCLDY WEATHER COV..... S CHC WEATHER TYPE....NONE NONE NONE NONE NONE TSTORM TEMP (F)........68 65 60 57 55 53 RH (%)..........31 34 41 45 51 57 20 FT WIND......S 15 S 15 S 14 S 14 S 14 S 14 20 FT WIND GUST.20 20 20 20 20 20 DISPERSAL INDEX.GOOD POOR POOR POOR POOR POOR CHC OF PCPN (%).10 10 10 10 10 20 .TUESDAY... MAX TEMPERATURE.....65-70. MIN HUMIDITY........45 PERCENT. TIME (CDT) 6 AM 9 AM NOON 3 PM SKY.............MCLDY MCLDY MCLDY PCLDY WEATHER COV.....S CHC CHANCE S CHC S CHC WEATHER TYPE....TSTORM TSTORM TSTORM TSTORM TEMP (F)........52 57 63 67 RH (%)..........63 59 52 45 20 FT WIND......S 16G25 S 22G30 S 28G35 S 28G35 DISPERSAL INDEX.POOR FAIR EXCEL EXCEL CHC OF PCPN (%).20 30 20 20 MIX HGT (FT)....300 1100 2800 3900 TRANSPORT WIND..S 24 S 31 S 37 S 40 HAINES INDEX....3 2 2 2 $$ FORECASTER...MJF REQUESTED BY...BRAD BOLDUAN TYPE OF REQUEST...PRESCRIBED .TAG 20090511.PURRI.01/FSD