FNUS73 KFSD 141251 FWSFSD SPOT FORECAST FOR IADNR PL DUCOMMUN...IOWA DNR NATIONAL WEATHER SERVICE SIOUX FALLS SD 751 AM CDT TUE APR 14 2009 IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. ...WATCH FOR DRY RELATIVE HUMIDITY VALUES AGAIN TODAY IN SOUTHWEST MINNESOTA AND NORTHWEST IOWA... .DISCUSSION... SYNOPTIC WISE...WE HAVE LOW PRESSURE DEPARTING THIS AREA IN THE OHIO VALLEY...AND ANOTHER AREA OF LOW PRESSURE SITUATED ACROSS THE WESTERN PLAINS. IN BETWEEN THESE TWO LOWS...WE HAVE A WEAK AREA OF HIGH PRESSURE NOSING BACK INTO SOUTHWEST MINNESOTA AND NORTHWEST IOWA FROM THE LAKE SUPERIOR AREA. BECAUSE OF THIS HIGH...WINDS WILL BE RATHER LIGHT AND VARIABLE THIS MORNING IN SOUTHWEST MINNESOTA AND NORTHWEST IOWA. HOWEVER FINALLY BY NOON AND 1 PM...THE WIND DIRECTIONS SHOULD SETTLE ON A EAST TO SOUTHEAST DIRECTION...AND THEN STAY THAT WAY THROUGH THE AFTERNOON. OVERALL...SUSTAINED WIND SPEEDS THIS AFTERNOON ARE EXPECTED TO BE AROUND 10 MPH. BUT DUE TO THE ABUNDANCE OF DRY AIR...WATCH FOR MIXING WINDS COMING DOWN FROM ALOFT BY AROUND 3 TO 4 PM...WHICH COULD PRODUCE ERRATIC GUSTINESS AT TIMES TO 15 TO 20 MPH IN SOUTHWEST MINNESOTA AND NORTHWEST IOWA. AT THE TOP OF THE MIXED LAYER...THE OMAHA AND MINNEAPOLIS 7 AM SOUNDINGS DO SHOW 15 TO 20 KNOTS THIS MORNING AT THE TOP OF THE MIXED LAYER. RH VALUES WILL ALSO LIKELY FALL TO 15 TO 20 PERCENT BY 3 TO 4 PM...SO SOMETHING TO WATCH FOR. SMOKE DISPERSAL WILL BE GOOD TODAY BY AROUND NOON. OUTLOOK FOR WEDNESDAY AFTERNOON...WE COULD VERY LIKELY HAVE BORDERLINE RED FLAG CONDITIONS IN SOUTHWEST MINNESOTA AND NORTHWEST IOWA. SO ANY BURNING YOU COULD GET DONE TODAY WOULD BE GREAT. .TODAY... MAX TEMPERATURE.....60-65. MIN HUMIDITY........19 PERCENT. TIME (CDT) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM SKY.............CLR MCR MCR MCR MCR MCR MCR CLR CLR CLR WEATHER TYPE.... TEMP (F)........34 42 49 54 58 60 61 62 63 63 RH (%)..........75 55 42 34 28 25 23 21 20 19 DEWPOINT (F)....27 27 27 26 25 24 23 22 21 20 20 FT WIND DIR..NNW NNW N N NE ENE ENE ENE ENE E 20 FT WIND SPD..5 5 6 6 7 7 7 7 7 8 20 FT WIND GUST. 10 11 13 14 12 DISPERSAL INDEX.PR PR PR FR FR GD GD GD GD GD CHC OF PCPN (%).0 0 0 0 0 0 0 0 0 0 MIX HGT (KFT)...0.8 1.3 1.8 3.1 4.4 5.8 5.8 5.9 5.9 5.7 TRANSP WIND DIR.NNW NNW N N NE ENE ENE E E E TRANSP WIND SPD.6 6 7 8 8 9 9 8 8 8 HAINES INDEX....4 4 4 4 4 4 4 4 4 4 .TONIGHT... MIN TEMPERATURE.....30-35. MAX HUMIDITY........72 PERCENT. TIME (CDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM SKY.............CLEAR CLEAR CLEAR CLEAR CLEAR CLEAR WEATHER TYPE....NONE NONE NONE NONE NONE NONE TEMP (F)........62 57 45 40 36 35 RH (%)..........20 25 43 57 67 69 20 FT WIND......E 9 E 9 E 8 ESE 8 ESE 7 ESE 8 20 FT WIND GUST.10 10 10 10 10 DISPERSAL INDEX.GOOD FAIR POOR POOR POOR POOR .WEDNESDAY... MAX TEMPERATURE.....63-68. MIN HUMIDITY........27 PERCENT. TIME (CDT) 6 AM 9 AM NOON 3 PM SKY.............MCLEAR MCLEAR MCLEAR PCLDY WEATHER TYPE....NONE NONE NONE NONE TEMP (F)........34 46 60 65 RH (%)..........72 47 31 27 20 FT WIND......ESE 9G10 ESE 14G20 SE 18G30 SE 22G30 DISPERSAL INDEX.POOR FAIR EXCEL EXCEL CHC OF PCPN (%).0 0 0 0 MIX HGT (FT)....300 1100 3400 4300 TRANSPORT WIND..ESE 10 SE 20 SE 25 SE 26 HAINES INDEX....4 4 5 5 $$ FORECASTER...MJF REQUESTED BY...LUCAS STRAW TYPE OF REQUEST...PRESCRIBED .TAG 20090414.IADNR.01/FSD