FNUS73 KFSD 091241 FWSFSD SPOT FORECAST FOR ARCO JOHNSON WPA...USFWS NATIONAL WEATHER SERVICE SIOUX FALLS SD 741 AM CDT MON APR 9 2012 IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. ...RED FLAG WARNING IN EFFECT FROM 1 PM THIS AFTERNOON TO 8 PM CDT THIS EVENING... .DISCUSSION...STRONG MIXING POTENTIAL IS EXPECTED TODAY IN DEEP NORTHWEST FLOW WHICH WILL AGAIN RESULT IN INCREASING GUSTY SURFACE WINDS DURING THE LATE MORNING AND AFTERNOON. GUSTS OVER 30 MPH WILL BE POSSIBLE IN THE BURN AREA. IN ADDITION...DESPITE COOLER AIR PUSHING SOUTH INTO THE REGION...THE DEEP MIXING OF THE DRY AIRMASS WILL DROP RELATIVE HUMIDITY LEVELS INTO THE 20 TO 25 PERCENT RANGE AGAIN THIS AFTERNOON. THIS WILL CREATE CRITICAL FIRE BEHAVIOR FOR THE AREA. MIXING WILL ONCE AGAIN BECOME A CONCERN ON TUESDAY WITH THE POTENTIAL FOR GUSTS OF 25 TO 30 MPH AND HUMIDITY VALUES AS LOW AS 25 PERCENT. .TODAY... MAX TEMPERATURE.....50-55. MIN HUMIDITY........23 PERCENT. TIME (CDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM SKY COVER.......MCR MCR MCR MCR PC PC PC PC PC PC MCR MCR % SKY COVER.....19 20 22 24 26 28 29 28 27 26 24 23 WEATHER COV.....PTY WEATHER TYPE....FST TEMP............33 34 42 45 47 49 51 52 53 53 53 52 RH..............51 54 41 38 35 30 27 25 24 23 23 24 DEWPOINT........17 19 20 21 21 19 18 17 17 16 16 16 20 FT WIND DIR..WNW NW NNW NNW NNW NW NW NW NW NW NW NW 20 FT WIND SPD..7 7 12 15 18 22 25 25 25 25 25 24 20 FT WIND GUST. 15 20 30 30 35 35 35 35 35 35 SMOKE DISPERSAL.PR PR FR EX EX EX EX EX EX EX EX EX .TONIGHT... MIN TEMPERATURE.....24-29. MAX HUMIDITY........67 PERCENT. TIME (CDT) 7 PM 9 PM 11 PM 1 AM 3 AM 5 AM SKY COVER.......MCLEAR MCLEAR MCLEAR MCLEAR MCLEAR MCLEAR % SKY COVER.....22 22 23 23 21 19 WEATHER COV..... AREAS AREAS AREAS WEATHER TYPE....NONE NONE NONE FROST FROST FROST TEMP............51 42 37 34 30 27 RH..............24 37 48 51 60 67 DEWPOINT........16 18 19 18 18 18 20 FT WIND......NW 21 NNW 13 NNW 8 NNW 7 NNW 7 NNW 6 20 FT WIND GUST.30 15 10 SMOKE DISPERSAL.EXCEL POOR POOR POOR POOR POOR .TUESDAY... MAX TEMPERATURE.....46-51. MIN HUMIDITY........24 PERCENT. TIME (CDT) 7 AM 10 AM 1 PM 4 PM SKY COVER.......MCLEAR MCLEAR MCLEAR MCLEAR % SKY COVER.....17 15 13 11 WEATHER COV.....AREAS WEATHER TYPE....FROST NONE NONE NONE TEMP............28 38 45 49 RH..............63 40 29 24 DEWPOINT........17 16 15 14 20 FT WIND......NW 6 NNW 14G20 NNW 17G25 NNW 18G30 SMOKE DISPERSAL.POOR GOOD EXCEL EXCEL WEATHER TYPE ABBREVIATIONS 1) T = THUNDERSTORMS 2) R = RAIN 3) RW = RAIN SHOWERS 4) L = DRIZZLE 5) ZR = FREEZING RAIN 6) ZL = FREEZING DRIZZLE 7) S = SNOW 8) SW = SNOW SHOWERS 9) IP = ICE PELLETS 10) F = FOG 11) ZF = FREEZING FOG 12) IC = ICE CRYSTALS 13) H = HAZE 14) BS = BLOWING SNOW 15) K = SMOKE 16) BD = BLOWING DUST 17) FR = FROST $$ FORECASTER...HANKO REQUESTED BY...CHAD LORETH TYPE OF REQUEST...PRESCRIBED .TAG 20120409.ARCOJ.01/FSD