FNUS73 KFSD 011356 FWSFSD SPOT FORECAST FOR LAKE ANDES...YANKTON AGNECY NATIONAL WEATHER SERVICE SIOUX FALLS SD 856 AM CDT MON AUG 1 2011 IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. ...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT THIS EVENING... .DISCUSSION...EXTREME HEAT AND HUMIDITY WILL PREVAIL TODAY. WINDS WILL INCREASE BY MID MORNING...AND CONTINUE STRONG AND GUSTY INTO EARLY EVENING. THERE IS AN EXPECTATION FOR DEWPOINTS TO DROP NOTICEABLY BY MID TO LATE AFTERNOON...AND THERE IS A SMALL CHANCE THAT IF WINDS BECOME A BIT MORE SOUTHWESTERLY...THAT DEWPOINTS COULD FALL ANOTHER 4 TO 6 DEGREES LOWER THAN FORECAST BETWEEN 3 PM AND 7 PM WHICH WOULD ALSO LIKELY BE ACCOMPANIED BY AN INCREASE IN AIR TEMPERATURE...MEANING HUMIDITIES POTENTIALLY LOWER BY AROUND 10 PERCENT. THIS DROP WOULD BE TEMPORARY...AND DECOUPLING OF THE AIRMASS THIS EVENING WOULD BRING A RAPID INCREASE IN HUMIDITY. .TODAY... MAX TEMPERATURE.....98-103. MIN HUMIDITY........34 PERCENT. TIME (CDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM SKY COVER.......MCR CLR CLR CLR CLR CLR CLR CLR CLR MCR MCR MCR % SKY COVER.....9 0 0 0 0 0 0 3 5 8 10 13 WEATHER COV..... WEATHER TYPE.... TEMP............80 80 83 86 89 92 95 97 99 100 100 98 RH..............82 79 73 67 60 53 47 42 38 35 31 37 DEWPOINT........74 73 74 74 73 72 71 70 69 67 64 67 20 FT WIND DIR..S S S S S S S S S S S S 20 FT WIND SPD..10 13 14 16 17 18 18 20 20 20 18 17 20 FT WIND GUST. 15 20 25 25 25 30 30 30 30 30 25 SMOKE DISPERSAL.PR PR PR FR FR GD GD EX EX EX EX FR CHC OF PCPN (%).0 0 0 0 0 0 0 0 0 0 0 0 MIX HGT (KFT)...0.3 0.5 0.7 0.9 1.3 1.8 2.3 3.0 3.7 4.5 3.1 1.7 TRANSP WIND DIR.S S S S S S S S S S S S TRANSP WIND SPD.15 20 23 26 28 29 29 30 31 30 26 23 HAINES INDEX....5 5 6 6 6 6 6 6 6 6 6 5 .TONIGHT... MIN TEMPERATURE.....73-78. MAX HUMIDITY........82 PERCENT. TIME (CDT) 7 PM 9 PM 11 PM 1 AM 3 AM 5 AM SKY COVER.......MCLEAR MCLEAR PCLDY PCLDY PCLDY MCLDY % SKY COVER.....15 22 31 40 50 57 WEATHER COV..... S CHC WEATHER TYPE....NONE NONE NONE NONE NONE RNSHWR TEMP............96 90 86 83 79 76 RH..............46 55 60 66 74 80 DEWPOINT........72 72 70 70 70 70 20 FT WIND......S 16 S 14 S 12 SSW 10 W 6 WNW 8 20 FT WIND GUST.25 20 15 10 SMOKE DISPERSAL.POOR POOR POOR POOR POOR POOR CHC OF PCPN (%).10 10 10 10 10 20 $$ FORECASTER...CHAPMAN REQUESTED BY...JULIAN RED BUFFALO TYPE OF REQUEST...PRESCRIBED .TAG 20110801.LAKEA.01/FSD