FNUS73 KOAX 221156 FWSOAX SPOT FORECAST FOR FARM CREEK PWA...POTTAWATTAMIE COUNTY CONSERVATION NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 656 AM CDT WED APR 22 2009 IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION... AS AN UPPER LEVEL RIDGE OF HIGH PRESSURE DEVELOPS ACROSS THE REGION TODAY...SKIES WILL BE MOSTLY SUNNY. LIGHT AND VARIABLE WINDS THIS MORNING WILL TURN MORE TO THE SOUTH THIS AFTERNOON AND INCREASE INTO THE 5 TO 10 MPH RANGE BY MID AFTERNOON. DESPITE SOME INCREASE IN SOUTHERLY WINDS TODAY...MOISTURE RETURN WILL STILL BE VERY LIMITED. RELATIVE HUMIDITY VALUES THIS MORNING WILL QUICKLY DROP AS EVEN LIMITED MIXING SHOULD ALLOW FOR SOME VERY DRY AIR JUST OFF THE SURFACE TO MIX DOWN. RELATIVE HUMIDITY VALUES BY LATE MORNING AND INTO THE EARLY AFTERNOON WILL DROP INTO THE MID 20S. THE LOW HUMIDITY WILL CREATE AN INCREASED FIRE DANGER...BUT WITH GENERALLY LIGHT WINDS...THIS WILL TEND TO LIMIT THE GROWTH POTENTIAL. .TODAY... SKY/WEATHER.........SUNNY (15-25 PERCENT). MAX TEMPERATURE.....AROUND 78. MIN HUMIDITY........24 PERCENT. 20-FOOT WINDS.......LIGHT WINDS BECOMING SOUTHEAST 5 TO 8 MPH EARLY IN THE AFTERNOON. HAINES INDEX........5 TO 6 OR OR MODERATE POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH TO OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......300-1700 FT AGL INCREASING TO 3200-4900 FT AGL LATE IN THE MORNING...THEN DECREASING TO 1800 FT AGL LATE IN THE AFTERNOON. TRANSPORT WINDS.....SOUTHWEST 2 TO 9 MPH. TIME (CDT) 7 AM 9 AM 11 AM 1 PM 3 PM 5 PM SKY (%).........17 27 25 14 12 13 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE NONE NONE TEMP............39 49 61 71 76 78 RH..............69 54 38 30 25 25 20 FT WIND......NW 1 NW 1 N 1 N 2 NE 5 E 7 20 FT WIND GUST. HAINES INDEX....5 5 5 6 5 5 .TONIGHT... SKY/WEATHER.........PARTLY CLOUDY (25-35 PERCENT). MIN TEMPERATURE.....AROUND 53. MAX HUMIDITY........80 PERCENT. 20-FOOT WINDS.......SOUTH WINDS 9 TO 10 MPH. HAINES INDEX........4 TO 5 OR OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH TO OR MODERATE POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......300 FT AGL. TRANSPORT WINDS.....SOUTH 9 TO 16 MPH INCREASING TO 17 TO 21 MPH IN THE LATE EVENING AND OVERNIGHT. TIME (CDT) 7 PM 9 PM 11 PM 1 AM 3 AM 5 AM SKY (%).........16 23 34 42 44 46 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE NONE NONE TEMP............76 68 63 60 57 54 RH..............27 37 48 56 65 73 20 FT WIND......S 9 S 10 S 10 S 10 S 9 S 9 20 FT WIND GUST.10 15 15 15 10 10 HAINES INDEX....5 5 5 5 4 4 .THURSDAY... SKY/WEATHER.........MOSTLY SUNNY (30-40 PERCENT). MAX TEMPERATURE.....AROUND 83. MIN HUMIDITY........37 PERCENT. 20-FOOT WINDS.......SOUTH WINDS 9 TO 18 MPH INCREASING TO AROUND 20 MPH IN THE AFTERNOON. HAINES INDEX........4 TO 5 OR OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH TO OR MODERATE POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......300-2100 FT AGL INCREASING TO 1500-3200 FT AGL IN THE AFTERNOON. TRANSPORT WINDS.....SOUTH 18 TO 26 MPH INCREASING TO 28 TO 30 MPH IN THE LATE MORNING AND AFTERNOON. TIME (CDT) 7 AM 9 AM 11 AM 1 PM 3 PM 5 PM SKY (%).........47 40 31 23 24 25 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE NONE NONE TEMP............53 61 70 77 82 83 RH..............80 66 51 43 38 37 20 FT WIND......S 9 S 13 S 16 S 20 S 20 S 20 20 FT WIND GUST.10 15 25 30 30 30 HAINES INDEX....4 4 4 5 5 5 $$ FORECASTER...NWS OMAHA/VALLEY REQUESTED BY...CHAD GRAEVE TYPE OF REQUEST...PRESCRIBED .TAG 20090422.FARMC.01/OAX