FNUS73 KFSD 221433 FWSFSD SPOT FORECAST FOR LYONLINDEN...MN DNR NATIONAL WEATHER SERVICE SIOUX FALLS SD 933 AM CDT WED APR 22 2009 IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...MAIN FEATURE TODAY IS A SURFACE RIDGE OF HIGH PRESSURE WHICH IS CURRENTLY LOCATED THROUGH THE CENTERS OF SOUTHWEST MINNESOTA AND NORTHWEST IOWA. THIS RIDGE OF HIGH PRESSURE WILL NUDGE SLOWLY EASTWARD. WINDS AROUND MARSHALL MINNESOTA ARE CURRENTLY LIGHT AND NORTH TO NORTHWEST. THEY WILL BECOME VARIABLE RIGHT IN THE MIDDLE OF THE DAY AS THEY SHIFT WITH THE SURFACE RIDGE MOVING EASTWARD... THEN WILL FINALLY SETTLE ON A SOUTHEAST TO SOUTH SOUTHEAST DIRECTION BY MID AFTERNOON. UNFORTUNATELY DUE TO THE LIGHT WINDS AT THE SURFACE AND ALOFT...SMOKE DISPERSION WILL BE RATHER POOR INTO EARLY AFTERNOON. OTHERWISE...AFTERNOON TEMPERATURES IN THE 60S WILL BE COMMON WITH MINIMUM RH VALUES DROPPING TO 25 TO 30 PERCENT. THE OUTLOOK FOR THURSDAY IS QUITE POOR. WINDS WILL FAVOR SOUTH TO SOUTHWEST AND WILL BE STRONG AT 25 TO 35 MPH BY LATE MORNING. MAYBE EVEN SOME GUSTS APPROACHING 40 MPH IN THE AFTERNOON. IT IS ANTICIPATED THAT THE RH VALUES ON THURSDAY WILL STAY A BIT TOO HIGH FOR RED FLAG CONDITIONS...BUT AN EXTREME FIRE DANGER IS LIKELY IN THE OFFING NONETHELESS. .TODAY... MAX TEMPERATURE.....66-71. MIN HUMIDITY........27 PERCENT. TIME (CDT) 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM SKY.............CLR CLR CLR MCR MCR MCR MCR MCR MCR WEATHER TYPE.... TEMP (F)........45 49 53 56 59 62 65 68 68 RH (%)..........55 48 43 38 34 32 29 27 28 DEWPOINT (F)....30 30 31 31 31 32 32 33 34 20 FT WIND DIR..NW NNW NNE ENE E E SE SSE SSE 20 FT WIND SPD..7 6 6 5 3 5 7 8 9 20 FT WIND GUST. 5 10 10 DISPERSAL INDEX.PR PR PR PR PR PR FR FR FR .TONIGHT... MIN TEMPERATURE.....51-56. MAX HUMIDITY........59 PERCENT. TIME (CDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM SKY.............MCLEAR MCLEAR MCLEAR PCLDY PCLDY PCLDY WEATHER TYPE....NONE NONE NONE NONE NONE NONE TEMP (F)........68 65 61 59 57 56 RH (%)..........29 34 41 47 51 53 DEWPOINT (F)....34 36 37 39 39 39 20 FT WIND......SSE 10 SSE 12 SSE 13 S 16 S 18 S 20 20 FT WIND GUST.15 15 15 25 25 30 CHC OF PCPN (%).10 10 10 10 10 10 .THURSDAY... MAX TEMPERATURE.....82-87. MIN HUMIDITY........31 PERCENT. TIME (CDT) 6 AM 9 AM NOON 3 PM SKY.............PCLDY PCLDY MCLEAR MCLEAR WEATHER TYPE....NONE NONE NONE NONE TEMP (F)........55 63 75 82 RH (%)..........57 52 41 33 20 FT WIND......SSW 21G30 SSW 24G35 SSW 28G35 SSW 32G40 DISPERSAL INDEX.POOR POOR GOOD EXCEL CHC OF PCPN (%).10 0 0 0 MIX HGT (FT)....300 500 2000 4400 TRANSPORT WIND..SSW 25 SSW 28 SSW 37 SSW 43 HAINES INDEX....5 6 5 5 $$ FORECASTER...MJF REQUESTED BY...BRAD BOLDUAN TYPE OF REQUEST...PRESCRIBED .TAG 20090422.LYONL.01/FSD