592 FNUS73 KJKL 052205 AAA FWSJKL Spot Forecast for Big Valley Fire...UPDATED National Weather Service Jackson, KY 505 PM EST Sun Dec 5 2021 Forecast is based on forecast start time of 0900 EST on December 05. If conditions become unrepresentative...contact the National Weather Service. .DISCUSSION...A cold front approaches late tonight and moves through the region on Monday. This boundary will bring a round of showers, and possibly a few thunderstorms as it passes. At least one half to three quarters of an inch of rain is still expected at the fire location. Much colder air then arrives behind the front on Monday and then hangs around until midweek, when there could even be a little bit of snow from a weaker system passing through. .REST OF TODAY... Sky/weather.........Mostly cloudy. Chance of pcpn......10 percent. LAL.................1. Max temperature.....Around 65. Min humidity........48 percent. Dewpoint............33 increasing to 45. Wind (20 ft)........South winds 6 to 13 mph with gusts to around 22 mph. Ridgetop wind.......South 13 to 16 mph. Transport winds.....South 14 to 16 mph in the afternoon. Ventilation rate....Poor (200-7400 knot-ft). Haines Index........3 very low potential for large plume dominated fire growth. TIME (EST) 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........85 90 87 75 60 45 45 40 39 Weather cov..... Weather type.... Tstm cov........ Chc of pcpn (%).0 0 0 10 10 10 10 10 10 LAL.............1 1 1 1 1 1 1 1 1 Temp............45 49 54 60 63 63 64 64 62 Dewpoint........32 34 38 43 44 44 46 46 47 RH..............60 56 54 53 50 50 52 52 58 20 FT wind dir..SE S SW S S S S S S 20 FT wind spd..3 3 3 5 6 7 6 9 11 20 FT wind gust.5 5 6 12 16 18 18 20 22 Ridge wind dir..SE S SW S S S S S S Ridge wind spd..5 5 5 7 8 10 9 13 16 Transp wind dir.SE SE SE S S S S S S Transp wind spd.3 5 8 12 15 16 16 15 14 Haines index....3 3 3 3 3 3 3 3 3 VRate kt-ft/10000 0 1 4 6 7 7 7 6 .TONIGHT... Sky/weather.........Partly cloudy then becoming mostly cloudy. A chance of rain showers in the evening, then rain showers likely and a slight chance of thunderstorms. Chance of pcpn......60 percent. LAL.................1 until 0300, then 2. Min temperature.....Around 54. Max humidity........90 percent. Dewpoint............50. Wind (20 ft)........South winds 13 to 17 mph. Gusts up to 35 mph late. Gusty and erratic winds expected near thunderstorms late at night. Ridgetop wind.......South 16 to 22 mph. Transport winds.....South 10 to 17 mph increasing to 20 to 24 mph late. Ventilation rate....Poor (2900-10000 knot-ft). Haines Index........3 to 4 OR very low potential for large plume dominated fire growth to low potential for large plume dominated fire growth. TIME (EST) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM Sky (%).........39 45 62 73 81 80 Weather cov..... S CHC CHANCE CHANCE CHANCE Weather type....NONE NONE RNSHWR RNSHWR RNSHWR RNSHWR Tstm cov........ S CHC Chc of pcpn (%).10 10 20 40 40 50 LAL.............1 1 1 1 1 2 Temp............58 57 58 57 58 58 Dewpoint........48 49 50 51 51 51 RH..............69 75 75 80 77 77 20 ft wind......S 11 S 11 S 13 S 14 S 15 S 15 20 ft wind gust.20 20 21 23 25 28 Ridgetop wind...S 16 S 16 S 18 S 20 S 21 S 21 Transport wind..S 12 S 10 S 13 S 17 S 21 S 23 Haines index....3 3 3 3 3 4 VRate kt-ft/10004 3 4 7 8 9 .MONDAY... Sky/weather.........Mostly cloudy. Rain showers and a slight chance of thunderstorms in the morning, then rain showers likely in the afternoon. Chance of pcpn......100 percent. LAL.................2 until 1100, then 1. Max temperature.....Around 60. Min humidity........57 percent. Dewpoint............52 decreasing to 29. Wind (20 ft)........Northwest winds 8 to 17 mph with gusts to around 30 mph. Gusty and erratic winds expected near thunderstorms. Ridgetop wind.......West 12 to 21 mph shifting to the northwest around 10 mph late in the afternoon. Transport winds.....West 18 to 25 mph. Ventilation rate....Poor to fair (11400-39800 knot-ft). Haines Index........2 to 4 OR very low potential for large plume dominated fire growth to low potential for large plume dominated fire growth. TIME (EST) 6 AM 9 AM NOON 3 PM Sky (%).........87 95 93 86 Weather cov.....DEFNTE DEFNTE LIKELY CHANCE Weather type....RNSHWR RNSHWR RNSHWR RNSHWR Tstm cov........S CHC S CHC Chc of pcpn (%).80 100 60 30 LAL.............2 2 1 1 Temp............57 55 50 45 Dewpoint........53 54 47 33 RH..............86 96 89 62 20 FT wind......SW 15G28 SW 14G23 W 10G18 W 8G18 Ridgetop wind...SW 21 SW 20 W 15 W 12 Transport wind..S 25 SW 22 W 20 W 20 Haines index....3 3 2 3 VRate kt-ft/100012 12 24 38 $$ Forecaster...GREIF Requested by...Larry Smith Type of request...WILDFIRE .TAG 2121978.0/JKL .DELDT 12/05/21 .EMAIL kykic@firenet.gov