FNUS74 KMOB 181339 FWSMOB Spot Forecast for Desoto BB 8301 Knob Creek...usfs National Weather Service Mobile AL 839 AM CDT Mon May 18 2026 Forecast is based on ignition time of 1000 CDT on May 18. If conditions become unrepresentative...contact the National Weather Service. ...HIGH DISPERSION INDEX AROUND 81 EXPECTED TUESDAY OVER THE BURN AREA... .DISCUSSION...There is a 20% chance of rain today. The minimum relative humidity is near 65%, 20 ft wind gusts will be up to near 25 mph, transport winds will be mostly south-southeasterly to southerly, and dispersion values will be good. For Tuesday, the minimum relative humidity is near 50%, 20 ft wind gusts will be up to near 20 mph, transport winds will be mostly southerly to southeasterly, and dispersion values will be good. Fog potential and other remarks...Patchy fog is anticipated to develop late tonight. Dense fog development cannot be ruled out, but at this point the lowest visibilities appear to be near 1 mile at the burn site. .REST OF TODAY... Sky/weather.........Partly sunny (45-55 percent). Slight chance of showers in the late morning and early afternoon. Slight chance of thunderstorms early in the afternoon. Chance of pcpn......20 percent. Max temperature.....Around 84. Min humidity........65 percent. Wind (20 ft)........Southeast winds 8 to 13 mph. Gusty and erratic winds expected near thunderstorms early in the afternoon. Mixing height.......4200 ft AGL. Mixing height (m)...884-1280 meters AGL. Transport winds.....South 15 to 17 mph. Transport winds m/s.South 7 to 8 meters/second. Dispersion index....48 increasing to 66 late in the morning, then decreasing to 58 late in the afternoon. LVORI...............2. Stability class.....3. TIME (CDT) 10 AM NOON 2 PM 4 PM Sky (%).........63 43 53 38 Weather cov.....S CHC S CHC S CHC Weather type....RNSHWR RNSHWR RNSHWR NONE Tstm cov........ S CHC Chc of pcpn (%).20 20 20 10 Temp............78 82 83 84 RH..............79 69 67 67 20 FT wind dir..SE SSE SSE SSE 20 FT wind spd..9 12 13 12 20 FT wind gust.17 20 21 21 Mix hgt (ft)....2900 3800 3900 3700 Mix hgt (m).....880 1160 1190 1130 Transp wind dir.SSE SSE S S Transp wind spd.15 16 16 16 Trans wind dir..SSE SSE S S Trans spd (m/s).7 7 7 7 Dispersion idx..48 63 59 56 LVORI...........3 1 1 1 .TONIGHT... Sky/weather.........Partly cloudy (35-45 percent) then becoming mostly cloudy (50-60 percent) then becoming partly cloudy (40-50 percent) then becoming mostly cloudy (65-75 percent). Patchy fog overnight. Chance of pcpn......10 percent. Min temperature.....Around 71. Max humidity........97 percent. Wind (20 ft)........Southeast winds 5 to 9 mph early in the evening becoming light. Mixing height.......400 ft AGL. Mixing height (m)...122-1128 meters AGL. Transport winds.....South 8 to 15 mph. Transport winds m/s.South 4 to 7 meters/second. Dispersion index....66 decreasing to 4. LVORI...............6. Stability class.....4. TIME (CDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM Sky (%).........37 53 54 74 77 76 Weather cov..... PATCHY PATCHY Weather type....NONE NONE NONE NONE FOG FOG Tstm cov........ Chc of pcpn (%).10 0 0 0 0 0 Temp............82 75 72 73 72 72 RH..............72 87 97 93 93 90 20 FT wind dir..SSE SSE SSE SE SSE SE 20 FT wind spd..10 6 5 3 2 2 20 FT wind gust.18 15 13 12 8 7 Mix hgt (ft)....3700 600 600 600 600 500 Mix hgt (m).....1130 180 180 180 180 150 Transp wind dir.S S SSE SSE SSE SSE Transp wind spd.15 12 10 10 9 9 Trans wind dir..S S SSE SSE SSE SSE Trans spd (m/s).7 5 4 4 4 4 Dispersion idx..66 8 7 5 4 4 LVORI...........3 5 8 6 6 6 .TUESDAY... Sky/weather.........Partly sunny (55-65 percent). Patchy fog early in the morning. Chance of pcpn......10 percent. Max temperature.....Around 89. Min humidity........54 percent. Wind (20 ft)........Light winds becoming southeast 6 to 9 mph in the late morning and afternoon. Mixing height.......5600 ft AGL. Mixing height (m)...152-1707 meters AGL. Transport winds.....South 9 to 14 mph. Transport winds m/s.South 4 to 6 meters/second. Dispersion index....7 increasing to 18 early in the morning, then increasing to 30 late in the morning increasing to 53 late in the morning increasing to 69 increasing to 81 early in the afternoon decreasing to 67 decreasing to 55 late in the afternoon. LVORI...............4. Stability class.....2. TIME (CDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM Sky (%).........76 69 60 49 47 53 Weather cov.....PATCHY Weather type....FOG NONE NONE NONE NONE NONE Tstm cov........ Chc of pcpn (%).0 0 0 0 10 10 Temp............72 73 80 85 88 89 RH..............90 90 72 63 55 54 20 FT wind dir..ESE SE SE SSE SSE SSE 20 FT wind spd..3 5 8 8 9 9 20 FT wind gust.8 12 15 15 16 16 Mix hgt (ft)....500 1300 2800 4300 5600 4700 Mix hgt (m).....150 400 850 1310 1710 1430 Transp wind dir.SE SE SSE S S S Transp wind spd.9 10 13 14 13 12 Trans wind dir..SE SE SSE S S S Trans spd (m/s).4 4 6 6 6 5 Dispersion idx..4 18 48 68 81 51 LVORI...........6 4 3 1 1 1 $$ Forecaster...29 Requested by...Jody Rogers Type of request...PRESCRIBED .TAG 2613914.0/MOB .DELDT 05/18/26 .FormatterVersion 2.0.0 .EMAIL joseph.rogers@usda.gov