FNUS74 KMOB 180925 FWSMOB Spot Forecast for Desoto Block 0250 Comp. 596-598...USFS National Weather Service Mobile AL 425 AM CDT Mon May 18 2026 Forecast is based on ignition time of 0615 CDT on May 18. If conditions become unrepresentative...contact the National Weather Service. ...HIGH DISPERSION INDEX AROUND 85 EXPECTED TUESDAY OVER THE BURN AREA... .DISCUSSION...Isolated showers and storms will be possible this afternoon with a 20% chance of rain. Afternoon minimum relative humidity will be near 70%. 20 ft wind gusts will be up to near 25 mph out of the south and transport winds will be mostly south- southeasterly. Afternoon dispersion values will be good. For Tuesday, rain chances will be less than 10 percent with minimum relative humidity values near 55%. 20 ft wind gusts will be up to near 20 mph with transport winds once again out of the south- southeast. Afternoon dispersion values will be good. No seabreeze is expected and would result in no changes in conditions. Fog potential and other remarks...Patchy fog will be possible early this morning with visibilities around 1 to 3 miles. Fog looks more likely on Tuesday morning with some areas dropping to less than 1 mile. .REST OF TODAY... Sky/weather.........Partly sunny (50-60 percent). Slight chance of showers late in the morning. Chance of pcpn......20 percent. Max temperature.....Around 83. Min humidity........70 percent. Wind (20 ft)........Light winds becoming southeast 5 to 12 mph. Mixing height.......3700 ft AGL. Mixing height (m)...152-1128 meters AGL. Transport winds.....Southeast 9 to 17 mph. Transport winds m/s.Southeast 4 to 8 meters/second. Dispersion index....8 increasing to 25 early in the morning, then increasing to 39 late in the morning increasing to 56 late in the morning increasing to 63 decreasing to 48 early in the afternoon increasing to 59. LVORI...............5. Stability class.....3. TIME (CDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM Sky (%).........61 59 59 42 48 41 Weather cov..... S CHC S CHC Weather type....NONE NONE RNSHWR RNSHWR NONE NONE Tstm cov........ Chc of pcpn (%).0 0 20 20 10 10 Temp............70 73 79 82 83 82 RH..............93 90 77 72 70 72 20 FT wind dir..ESE SE SSE SSE SSE SSE 20 FT wind spd..5 8 10 13 13 13 20 FT wind gust.10 14 17 21 22 21 Mix hgt (ft)....500 1400 3000 3600 3500 3300 Mix hgt (m).....150 430 910 1100 1070 1010 Transp wind dir.SE SSE SSE SSE SSE SSE Transp wind spd.9 13 16 17 17 17 Trans wind dir..SE SSE SSE SSE SSE SSE Trans spd (m/s).4 6 7 8 8 8 Dispersion idx..5 25 52 63 61 57 LVORI...........6 4 3 3 3 3 .TONIGHT... Sky/weather.........Partly cloudy (40-50 percent) then becoming mostly cloudy (60-70 percent). Patchy fog overnight. Chance of pcpn......10 percent. Min temperature.....Around 72. Max humidity........93 percent. Wind (20 ft)........Southeast winds 5 to 10 mph in the evening becoming light. Mixing height.......500 ft AGL. Mixing height (m)...152-1006 meters AGL. Transport winds.....Southeast 8 to 16 mph. Transport winds m/s.Southeast 4 to 7 meters/second. Dispersion index....58 decreasing to 5. LVORI...............5. Stability class.....4. TIME (CDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM Sky (%).........41 45 62 81 74 81 Weather cov..... PATCHY PATCHY Weather type....NONE NONE NONE NONE FOG FOG Tstm cov........ Chc of pcpn (%).10 0 0 0 0 0 Temp............81 76 75 74 74 73 RH..............74 87 90 93 90 90 20 FT wind dir..SSE SE SE SE SE SE 20 FT wind spd..12 8 7 5 3 3 20 FT wind gust.18 14 13 10 8 7 Mix hgt (ft)....3300 700 700 800 600 500 Mix hgt (m).....1010 210 210 240 180 150 Transp wind dir.SSE SSE SSE SSE SSE SE Transp wind spd.16 13 10 10 10 8 Trans wind dir..SSE SSE SSE SSE SSE SE Trans spd (m/s).7 6 4 4 4 4 Dispersion idx..58 11 8 7 5 4 LVORI...........3 5 5 6 6 6 .TUESDAY... Sky/weather.........Partly sunny (50-60 percent). Patchy fog early in the morning. Chance of pcpn......10 percent. Max temperature.....Around 87. Min humidity........57 percent. Wind (20 ft)........Light winds becoming southeast 5 to 9 mph early in the morning. Mixing height.......5100 ft AGL. Mixing height (m)...152-1554 meters AGL. Transport winds.....Southeast 9 to 14 mph. Transport winds m/s.Southeast 4 to 6 meters/second. Dispersion index....7 increasing to 18 early in the morning, then increasing to 38 late in the morning increasing to 53 late in the morning increasing to 69 increasing to 76 late in the afternoon decreasing to 67. LVORI...............4. Stability class.....2. TIME (CDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM Sky (%).........77 69 61 40 43 46 Weather cov.....PATCHY Weather type....FOG NONE NONE NONE NONE NONE Tstm cov........ Chc of pcpn (%).0 10 10 10 10 10 Temp............73 74 81 85 86 87 RH..............90 90 72 63 59 57 20 FT wind dir..ESE SE SE SSE SSE S 20 FT wind spd..3 6 9 10 10 10 20 FT wind gust.8 12 15 16 17 17 Mix hgt (ft)....500 1400 2900 4000 5100 4300 Mix hgt (m).....150 430 880 1220 1550 1310 Transp wind dir.SE SE SSE SSE S SSE Transp wind spd.9 10 14 14 14 13 Trans wind dir..SE SE SSE SSE S SSE Trans spd (m/s).4 4 6 6 6 6 Dispersion idx..4 18 42 64 73 65 LVORI...........6 4 3 1 1 1 $$ Forecaster...8 Requested by...Cliff Willis Type of request...PRESCRIBED .TAG 2613602.4/MOB .DELDT 05/18/26 .FormatterVersion 2.0.0 .EMAIL clifton.willis@usda.gov