FNUS73 KFSD 031108 FWSFSD SPOT FORECAST FOR BLIXSETH...U.S. FISH & WILDLIFE SERVICE NATIONAL WEATHER SERVICE SIOUX FALLS SD 608 AM CDT SUN MAY 3 2009 IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...RIDGE OF SURFACE HIGH PRESSURE WILL MOVE INTO SOUTH CENTRAL SOUTH DAKOTA TODAY...THEN CONTINUE EAST THROUGH THE ENTIRE AREA TONIGHT. EAST OF THE RIDGE AXIS...STRONG MIXING WILL BRING THE POTENTIAL FOR BRIEF WIND GUSTS TO AROUND 20 MPH OVER SOUTHWEST MINNESOTA AND PARTS OF THE MIDDLE BIG SIOUX RIVER VALLEY DURING THE MID TO LATE AFTERNOON. WINDS WILL QUICKLY DECOUPLE AND BECOME LIGHT AND VARIABLE TOWARD SUNSET. THE DEEP MIXING WILL AGAIN ALLOW FOR MINIMUM RELATIVE HUMIDITY VALUES OF 20 TO 25 PERCENT THIS AFTERNOON. AN UPPER LEVEL WAVE WILL BRING A CHANCE OF RAIN BACK TO MOST AREAS LATE MONDAY AFTERNOON THROUGH TUESDAY EVENING...WITH THE GREATEST CHANCE FOR MORE THAN JUST SPOTTY SHOWERS OR THUNDERSTORMS OCCURING MONDAY NIGHT. .TODAY... MAX TEMPERATURE.....65-70. MIN HUMIDITY........22 PERCENT. TIME (CDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM SKY.............MCR MCR MCR MCR MCR MCR MCR MCR MCR MCR MCR WEATHER COV..... WEATHER TYPE.... TEMP (F)........38 45 51 57 61 64 65 66 66 67 68 RH (%)..........70 55 46 37 32 28 26 24 24 23 22 DEWPOINT (F)....29 30 31 31 31 30 29 28 28 28 28 20 FT WIND DIR..WNW W W WNW NW NW NW NW NW NW NW 20 FT WIND SPD..7 7 8 9 13 14 14 14 14 13 13 20 FT WIND GUST. 10 10 15 20 20 20 20 15 15 DISPERSAL INDEX.PR PR FR GD GD EX EX EX EX EX EX CHC OF PCPN (%).0 0 0 0 0 0 0 0 0 0 0 MIX HGT (KFT)...0.3 1.4 2.5 3.7 4.8 5.8 6.9 7.4 7.8 8.2 8.2 TRANSP WIND DIR.W WNW WNW NW NW NW NW NW NW NW NW TRANSP WIND SPD.7 8 12 15 16 16 16 16 15 14 14 HAINES INDEX....5 5 4 4 4 4 4 4 5 5 5 .TONIGHT... MIN TEMPERATURE.....40-45. MAX HUMIDITY........70 PERCENT. TIME (CDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM SKY.............MCLEAR CLEAR CLEAR MCLEAR MCLEAR MCLEAR WEATHER TYPE....NONE NONE NONE NONE NONE NONE TEMP (F)........67 61 52 48 45 44 RH (%)..........24 33 50 58 65 68 DEWPOINT (F)....29 32 34 34 34 34 20 FT WIND......NW 12 NNW 5 NNE 3 E 2 ESE 3 SE 5 20 FT WIND GUST.15 5 5 DISPERSAL INDEX.EXCEL FAIR POOR POOR POOR POOR .MONDAY... MAX TEMPERATURE.....69-74. MIN HUMIDITY........29 PERCENT. TIME (CDT) 6 AM 9 AM NOON 3 PM SKY.............MCLEAR MCLEAR MCLEAR PCLDY WEATHER TYPE....NONE NONE NONE NONE TEMP (F)........44 55 67 70 RH (%)..........70 51 33 30 DEWPOINT (F)....35 37 37 37 20 FT WIND......SSE 6 SSE 12G15 S 17G25 S 22G30 DISPERSAL INDEX.POOR FAIR EXCEL EXCEL CHC OF PCPN (%).0 0 0 0 MIX HGT (FT)....300 1500 5300 7900 TRANSPORT WIND..SSE 7 SSE 15 S 20 S 24 HAINES INDEX....4 4 4 5 $$ FORECASTER...JH REQUESTED BY...ERIC EARHART TYPE OF REQUEST...PRESCRIBED .TAG 20090503.BLIXS.01/FSD