FNUS74 KEWX 072250 FWSEWX SPOT FORECAST FOR ONION CREEK RED BARN...AWU WILDLAND CONSERVATION DIVISION NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 550 PM CDT WED AUG 7 2013 FORECAST IS BASED ON IGNITION TIME OF 1000 CDT ON AUGUST 08. IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER SERVICE. ...HEAT ADVISORY IN EFFECT UNTIL 7 PM CDT THURSDAY FOR AFTERNOON HEAT INDICES OF 105 TO 110 DEGREES... .DISCUSSION... HOT AND DRY CONDITIONS ARE EXPECTED OVER THE BURN AREA THROUGH FRIDAY AS A STABLE WEATHER PATTERN REMAINS IN PLACE. THE HOT TEMPERATURES AND GUSTY SOUTH WINDS WILL RESULT IN ELEVATED FIRE WEATHER CONDITIONS DURING THE AFTERNOON HOURS AS MINIMUM HUMIDITIES DROP INTO THE 20-25% RANGE. ADEQUATE MOISTURE WILL CONTINUE TO PROVIDE EXCELLENT OVERNIGHT HUMIDITY RECOVERIES ABOVE 80%. HOT AND DRY WEATHER IS EXPECTED TO CONTINUE THROUGH FRIDAY. A SLIGHT INCREASE IN LOW-LEVEL MOISTURE COULD ALLOW ISOLATED SHOWERS AND THUNDERSTORMS TO DEVELOP THIS WEEKEND. .TONIGHT... SKY/WEATHER.........MOSTLY CLEAR (5-15 PERCENT) THEN BECOMING MOSTLY CLOUDY (55-65 PERCENT) AFTER MIDNIGHT. MIN TEMPERATURE.....AROUND 76. MAX HUMIDITY........85 PERCENT. WIND (20 FT)........SOUTH WINDS 7 TO 13 MPH. HAINES INDEX........5 TO 6 OR MODERATE TO HIGH POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......4600-6000 FT AGL DECREASING TO 1200 FT AGL. TRANSPORT WINDS.....SOUTH 15 TO 20 MPH INCREASING TO AROUND 25 MPH AFTER MIDNIGHT. TIME (CDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM SKY (%).........10 5 5 5 52 60 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE NONE NONE TEMP............100 95 88 84 81 78 RH..............24 32 51 62 71 80 20 FT WIND......S 12 S 13 S 11 S 10 S 9 S 8 20 FT WIND GUST.20 20 15 15 10 10 HAINES INDEX....6 6 5 5 5 5 .THURSDAY... SKY/WEATHER.........MOSTLY CLOUDY (55-65 PERCENT) UNTIL 1000 THEN MOSTLY SUNNY (20-30 PERCENT). MAX TEMPERATURE.....AROUND 102. MIN HUMIDITY........23 PERCENT. WIND (20 FT)........SOUTH-SOUTHWEST WINDS 7 TO 13 MPH WITH GUSTS TO 20 MPH. HAINES INDEX........5 TO 6 OR MODERATE TO HIGH POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......1300-3000 FT AGL INCREASING TO 5400-6100 FT AGL. TRANSPORT WINDS.....SOUTH 15 TO 25 MPH DECREASING TO AROUND 14 MPH LATE IN THE AFTERNOON. TIME (CDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM SKY (%).........62 45 31 31 10 10 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE NONE NONE TEMP............77 78 85 92 98 101 RH..............83 79 63 43 33 25 20 FT WIND......S 7 S 7 S 9 S 10 S 10 S 12 20 FT WIND GUST.10 10 15 15 15 20 HAINES INDEX....5 5 6 6 6 5 $$ FORECASTER...24 REQUESTED BY...LUCIEN BALL TYPE OF REQUEST...PRESCRIBED .TAG 20130808.ONION.01/EWX