####018008495#### FNUS72 KGSP 250921 FWSGSP Spot Forecast for GW-TNC North Saluda...TNC National Weather Service Greenville-Spartanburg SC 521 AM EDT Thu Apr 25 2024 Forecast is based on ignition time of 0600 EDT on April 25. If conditions become unrepresentative...contact the National Weather Service. .DISCUSSION... High pressure moving past to the north will give us a fair and sunny day with RH dropping down to the 30-35 percent range this afternoon. The main concern will be the winds. Although speed will be light, the wind direction is expected to be a northerly downslope/drainage wind at daybreak but will steadily veer to northeast and east through midday, and then south to southwest and upslope in the mid afternoon. The transport wind will show the same behavior, and could veer a bit quicker, but will also be less than 10 mph. Note that the winds seen in the morning FWF represent a 12-hour average over several forecast zones, whereas a Spot Forecast has information specific to the location of the burn, so the Spot is more detailed. Around sunset, the light wind will return to a downslope drainage flow, most likely northeast or north. Clouds will increase overnight and moisture will recover. Friday looks cloudy and cool with a chance of light rain, thus fairly high afternoon RH. Rain amounts will be less than a tenth of an inch if it rains at all. Wind should be east to northeast with confidence. .TODAY... Sky/weather.........Sunny (10-20 percent). Max temperature.....Around 74. Min humidity........34 percent. Wind (20 ft)........North winds 5 to 6 mph shifting to the northeast around 5 mph late in the morning, then becoming light early in the afternoon becoming south around 6 mph late in the afternoon. Mixing height.......6300 ft AGL. Transport winds.....North 8 to 12 mph shifting to the east 6 to 7 mph late in the morning, then shifting to the southwest 6 to 8 mph in the afternoon. Smoke dispersal.....Poor (4000 knot-ft) early in the morning increasing to good (44000 knot-ft) in the afternoon. LVORI...............3. ADI.................5 early in the morning increasing to 62 in the afternoon. Stability class.....3. Pcpn amount.........0.00 inches. Ceiling (FT)........24000. Visibility (SM).....9. Sfc pressure (in)...28.38. TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........0 0 2 2 2 3 8 20 12 14 17 26 Weather cov..... Weather type.... Tstm cov........ Temp............48 49 50 55 60 64 67 70 71 71 73 73 Dewpoint........42 42 42 43 44 43 43 43 42 43 43 44 RH..............79 79 74 64 55 46 41 38 36 36 34 35 20 FT wind dir..N N N N NE NE E E SE SE S S 20 FT wind spd..6 6 5 5 5 5 3 3 2 3 6 6 20 FT wind gust.10 9 9 8 8 9 7 6 5 7 9 12 Mix hgt (kft)...0.4 0.4 0.4 0.9 3.0 4.4 5.2 5.7 6.1 6.2 6.3 6.1 Transp wind dir.N N N N NE NE E SW SW SW SW SW Transp wind spd.12 12 10 9 8 7 6 6 7 7 8 8 LVORI...........4 4 3 2 1 1 1 1 1 1 1 1 ADI.............5 11 10 11 31 39 37 40 52 52 62 55 VRate kt-ft/10005 4 4 7 21 27 26 28 37 38 44 43 Ceiling (hft)...250 250 250 250 250 250 250 250 250 240 240 240 Visibility (sm).9 9 9 10 10 10 10 10 10 10 10 10 Sfc pres (in)...840 841 842 843 843 844 843 843 842 841 840 838 .TONIGHT... Sky/weather.........Partly cloudy (35-45 percent) then becoming mostly cloudy (60-70 percent). Min temperature.....Around 52. Max humidity........83 percent. Wind (20 ft)........South winds around 6 mph early in the evening becoming light, then becoming northeast 5 to 7 mph after 3 am. Mixing height.......400 ft AGL. Transport winds.....South 6 to 9 mph shifting to the northeast 5 to 12 mph late in the evening. Smoke dispersal.....Good (43900 knot-ft) early in the evening decreasing to poor (1800 knot-ft) late in the night. LVORI...............3. ADI.................57 early in the evening decreasing to 2 late in the night. Stability class.....4. Pcpn amount.........0.00 inches. Ceiling (FT)........21000 decreasing to 11000. Visibility (SM).....10. Sfc pressure (in)...28.39. TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM Sky (%).........35 43 52 60 77 69 62 50 49 50 52 54 Weather cov..... Weather type.... Tstm cov........ Temp............71 69 64 62 60 59 58 57 56 55 54 53 Dewpoint........45 46 47 46 46 46 46 45 45 45 46 46 RH..............39 43 53 56 59 62 64 66 67 70 73 76 20 FT wind dir..S S S S N N N NE NE NE NE NE 20 FT wind spd..6 6 3 2 1 2 3 3 3 5 6 7 20 FT wind gust.10 9 7 3 2 5 6 6 7 8 9 12 Mix hgt (kft)...5.5 2.0 0.5 0.5 0.5 0.4 0.4 0.4 0.5 0.5 0.5 0.5 Transp wind dir.SW S S S SE NE NE E E E NE NE Transp wind spd.9 7 6 6 6 5 6 6 7 8 10 12 LVORI...........1 2 2 3 3 3 3 3 3 3 3 4 ADI.............57 5 4 3 3 2 3 3 5 5 7 8 VRate kt-ft/100044 12 2 2 2 2 2 2 3 4 5 5 Ceiling (hft)...240 240 240 220 220 210 220 160 130 120 120 110 Visibility (sm).10 10 10 10 10 10 10 10 10 10 10 10 Sfc pres (in)...839 839 840 841 843 844 844 843 843 843 843 843 .FRIDAY... Sky/weather.........Mostly cloudy (75-85 percent). Slight chance of rain. Max temperature.....Around 63. Min humidity........69 percent. Wind (20 ft)........East winds 7 to 9 mph. Mixing height.......1800 ft AGL. Transport winds.....East 8 to 14 mph. Smoke dispersal.....Poor (5300 knot-ft) early in the morning increasing to fair (14400 knot-ft) in the afternoon. LVORI...............4. ADI.................11 to 21. Stability class.....3. Pcpn amount.........0.03 inches. Ceiling (FT)........9000 decreasing to 1700. Visibility (SM).....10 early in the morning. Sfc pressure (in)...28.45. TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........66 78 84 84 84 85 86 87 88 90 92 93 Weather cov..... SCH SCH SCH SCH SCH SCH SCH SCH SCH SCH SCH Weather type.... RN RN RN RN RN RN RN RN RN RN RN Tstm cov........ Temp............53 52 53 54 55 58 59 61 62 63 63 63 Dewpoint........46 47 48 49 50 51 51 52 52 53 53 53 RH..............79 82 81 83 81 77 75 72 70 69 69 71 20 FT wind dir..NE NE NE NE E E E E E E E E 20 FT wind spd..8 9 9 9 8 8 8 8 7 7 7 7 20 FT wind gust.14 16 15 15 14 14 13 13 13 12 12 12 Mix hgt (kft)...0.5 0.5 1.1 1.4 1.4 1.5 1.5 1.7 1.8 1.4 1.4 1.5 Transp wind dir.NE NE NE E E E E E E E E E Transp wind spd.13 14 13 12 10 9 9 9 9 8 8 8 LVORI...........4 4 3 4 3 3 3 3 3 3 3 3 ADI.............11 11 16 20 18 18 18 19 21 15 15 15 VRate kt-ft/10005 6 12 14 12 12 12 13 14 10 10 10 Ceiling (hft)...90 60 29 17 17 17 17 17 17 17 17 17 Visibility (sm).10 10 10 Sfc pres (in)...845 848 850 852 853 855 855 855 855 854 853 853 $$ Forecaster...Pat Moore Requested by...Yeatman Type of request...PRESCRIBED .TAG 2412333.0/GSP .DELDT 04/25/24 .FormatterVersion 2.0.0