FNUS73 KABR 041711 FWSABR SPOT FORECAST FOR BARRY LAKE...US FISH AND WILDLIFE SERVICE NATIONAL WEATHER SERVICE ABERDEEN SD 1211 PM CDT MON MAY 4 2009 FORECAST IS BASED ON IGNITION TIME OF 1300 CDT ON MAY 04. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION... A LOW PRESSURE TROUGH AND ASSOCIATED COLD FRONT CURRENTLY EXTENDS THROUGH WESTERN SOUTH DAKOTA AND WILL SHIFT EAST TODAY. WIND DIRECTION WILL REMAIN OUT OF THE SOUTH AND SPEEDS WILL INCREASE TO 15 TO 20 MPH WITH GUSTS OF 25 TO 30 MPH POSSIBLE DURING THE MID TO LATE AFTERNOON HOURS. MINIMUM RELATIVE HUMIDITIES FOR THIS AFTERNOON WILL BE IN THE UPPER 20 TO LOW 30 PERCENT RANGE. THIS COMBINATION OF WINDS AND LOW RELATIVE HUMIDITIES HAS PLACED THE AREA IN A VERY HIGH CATEGORY OF THE GRASSLAND FIRE DANGER INDEX. AS THE ABOVE MENTIONED TROUGH MOVES EAST IT WILL BE THE FOCUS FOR RAIN SHOWERS AND THUNDERSTORMS THIS EVENING AND INTO THE OVERNIGHT HOURS...IT WILL LIKELY BE AFTER 6PM BEFORE YOU SEE SHOWERS DEVELOP. .TODAY... SKY/WEATHER.........PARTLY SUNNY (50-60 PERCENT CLOUD). MAX TEMPERATURE.....68-73. MIN HUMIDITY........28-33 PERCENT. WIND (20 FT)........LIGHT WINDS UNTIL 0900...THEN SOUTH 11 TO 21 MPH WITH GUSTS TO AROUND 30 MPH. HAINES INDEX........4 OR LOW. MIXING HEIGHT.......1500 FT AGL UNTIL 1300...THEN 7900 FT AGL. TRANSPORT WINDS.....SOUTH 13 TO 18 MPH. SMOKE DISPERSAL.....AROUND 18800 UNTIL 1300...THEN AROUND 123100. CWR.................ZERO. LAL.................1. TIME (CDT) 1PM 2PM 3PM 4PM 5PM 6PM SKY (%).........57 59 62 65 69 72 WEATHER COV..... WEATHER TYPE.... TEMP............65 66 68 69 69 68 RH..............35 33 32 32 35 37 20 FT WIND DIR..S S S S S S 20 FT WIND SPD..14 15 17 19 18 16 20 FT WIND GUST.20 25 25 30 25 25 .TONIGHT... SKY/WEATHER.........MOSTLY CLOUDY (75-85 PERCENT CLOUD). A CHANCE OF SHOWERS AND THUNDERSTORMS UNTIL 0400...THEN A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS. MIN TEMPERATURE.....46-51. MAX HUMIDITY........83-88 PERCENT. WIND (20 FT)........SOUTHWEST WINDS 8 TO 16 MPH. GUSTY AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS. MIXING HEIGHT.......300 FT AGL. TRANSPORT WINDS.....SOUTH 30 TO 35 MPH. SMOKE DISPERSAL.....6500-7000. CWR.................50 PERCENT. TIME (CDT) 7 PM 9 PM 11 PM 1 AM 3 AM 5 AM SKY (%).........74 78 83 87 81 72 WEATHER COV.....CHANCE CHANCE CHANCE CHANCE CHANCE S CHC WEATHER TYPE....RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR TEMP............68 61 57 55 52 51 RH..............40 52 67 84 88 83 20 FT WIND......S 14 S 14 S 14 S 14 S 12 SW 12 20 FT WIND GUST.20 20 20 20 20 20 .TUESDAY... SKY/WEATHER.........PARTLY SUNNY (50-60 PERCENT CLOUD). MAX TEMPERATURE.....69-74. MIN HUMIDITY........34-39 PERCENT. WIND (20 FT)........WEST WINDS 6 TO 16 MPH. MIXING HEIGHT.......4600 FT AGL UNTIL 1300...THEN 8600 FT AGL. TRANSPORT WINDS.....WEST 28 TO 34 MPH. SMOKE DISPERSAL.....AROUND 122500 UNTIL 1300...THEN AROUND 207400. CWR.................ZERO. TIME (CDT) 7 AM 9 AM 11 AM 1 PM 3 PM 5 PM SKY (%).........66 59 50 43 42 41 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE NONE NONE TEMP............50 56 62 67 69 70 RH..............75 59 48 42 38 36 20 FT WIND......SW 14 SW 14 SW 14 SW 14 W 12 W 9 20 FT WIND GUST.20 20 20 20 20 10 $$ FORECASTER...KRAMLICH REQUESTED BY...SETH GRIMM TYPE OF REQUEST...PRESCRIBED .TAG 20090504.BARRY.01/ABR