FNUS73 KFSD 181309 FWSFSD SPOT FORECAST FOR JEMMERSON WPA...USFWS NATIONAL WEATHER SERVICE SIOUX FALLS SD 809 AM CDT SUN APR 18 2010 IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...SIMILAR TO YESTERDAY...HIGH PRESSURE IS EXTENDED FROM NORTH TO SOUTH JUST EAST OF INTERSTATE 29. THIS WILL PROVIDE LIGHT WINDS ALONG AND EAST OF I 29...PROGRESSIVELY INCREASING APPROACHING CENTRAL SOUTH DAKOTA. MINIMUM HUMIDITY VALUES WILL ONCE AGAIN BE LOW ACROSS THIS ENTIRE AREA...MAINLY IN THE 20 TO 25 PERCENT RANGE. SO COUPLED WITH THE HIGHER WIND SPEEDS...THE GRASSLAND FIRE DANGER INDEX WILL BE IN THE VERY HIGH CATEGORY TODAY WEST OF I 29. LATE TONIGHT THROUGH TUESDAY NIGHT...A WEAK UPPER LEVEL LOW WILL SLOWLY SHIFT EASTWARD ACROSS THE PLAINS...PROVIDING SOME CHANCES FOR SHOWERS OR THUNDERSTORMS MAINLY ALONG AND WEST OF I 29. THE BEST CHANCE FOR RAIN WILL BE ALONG OUR MISSOURI RIVER COUNTIES LATE TUESDAY AND TUESDAY NIGHT. HUMIDITY VALUES WILL INCREASE ON MONDAY AND TUESDAY HELPING TO ALLEVIATE SOME OF THE FIRE DANGER. THERE STILL APPEARS TO BE GOOD CHANCES FOR BENEFICIAL RAINFALL LATE THIS UPCOMING WEEK. .TODAY... MAX TEMPERATURE.....61-66. MIN HUMIDITY........22 PERCENT. TIME (CDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM SKY COVER.......PC PC PC PC PC PC PC PC PC PC PC PC % SKY COVER.....30 29 28 27 28 29 30 33 36 38 41 44 WEATHER COV..... WEATHER TYPE.... TEMP............32 38 47 54 57 58 59 61 62 64 64 63 RH..............85 70 53 41 35 32 28 25 24 22 22 23 DEWPOINT........28 29 31 31 30 28 26 25 25 24 24 25 20 FT WIND DIR..WNW WNW NW NW NNW NNE NE ENE ENE ENE E E 20 FT WIND SPD..3 2 2 1 2 3 5 6 6 6 5 5 20 FT WIND GUST.5 SMOKE DISPERSAL.PR PR PR PR PR FR FR FR FR FR FR FR CHC OF PCPN (%).0 0 0 0 0 0 0 0 0 0 0 0 MIX HGT (KFT)...0.3 0.3 0.5 0.7 2.0 3.3 4.6 5.1 5.7 6.2 6.2 5.3 TRANSP WIND DIR.NE NE NE NE NE NE NE ENE E E ESE SE TRANSP WIND SPD.5 5 5 6 6 6 6 6 6 6 5 5 HAINES INDEX....5 5 5 5 5 4 4 4 4 4 4 4 .TONIGHT... MIN TEMPERATURE.....34-39. MAX HUMIDITY........79 PERCENT. TIME (CDT) 7 PM 9 PM 11 PM 1 AM 3 AM 5 AM SKY COVER.......PCLDY PCLDY PCLDY PCLDY PCLDY PCLDY % SKY COVER.....47 45 43 41 43 44 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE NONE NONE TEMP............61 54 47 44 42 40 RH..............25 35 51 62 67 73 DEWPOINT........25 27 30 32 32 32 20 FT WIND......E 3 ESE 3 SE 5 SSE 5 SSE 2 S 1 20 FT WIND GUST. SMOKE DISPERSAL.FAIR POOR POOR POOR POOR POOR .MONDAY... MAX TEMPERATURE.....65-70. MIN HUMIDITY........27 PERCENT. TIME (CDT) 7 AM 10 AM 1 PM 4 PM SKY COVER.......PCLDY PCLDY PCLDY PCLDY % SKY COVER.....45 46 47 44 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE TEMP............38 50 61 67 RH..............79 56 35 27 DEWPOINT........32 35 33 32 20 FT WIND......SW 2 SSW 3 SSW 5 SSW 6 SMOKE DISPERSAL.POOR POOR GOOD GOOD $$ FORECASTER...RYRHOLM REQUESTED BY...CHAD LORETH TYPE OF REQUEST...PRESCRIBED .TAG 20100418.JEMME.01/FSD