280
FNUS74 KMOB 201746
FWSMOB
SPOT FORECAST FOR CHICKASAWHAY GPT CPT 451 452...USFS
NATIONAL WEATHER SERVICE MOBILE AL
1246 PM CDT WED MAY 20 2026
FORECAST IS BASED ON IGNITION TIME OF 1500 CDT ON MAY 20.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
SCATTERED SHOWERS AND STORMS ARE EXPECTED TO DEVELOP
NEAR THE BURN SITE THIS AFTERNOON. STORM COVERAGE BECOMES MORE
NUMEROUS ON THURSDAY. FOR THE REST OF TODAY, THE MINIMUM RELATIVE
HUMIDITY IS NEAR 55%, TRANSPORT WINDS WILL BE MOSTLY SOUTHERLY TO
SOUTH-SOUTHWESTERLY, AND DISPERSION VALUES WILL BE GENERALLY
GOOD. FOR THURSDAY, THE MINIMUM RELATIVE HUMIDITY IS NEAR 60%,
TRANSPORT WINDS WILL BE SOUTHERLY AND DISPERSION VALUES WILL BE
FAIR.
FOG POTENTIAL AND OTHER REMARKS...PATCHY FOG DEVELOPMENT CANNOT BE
RULED OUT LATE TONIGHT AND INTO THURSDAY MORNING.
REST OF TODAY
SKY/WEATHER.........PARTLY SUNNY (60-70 PERCENT). CHANCE OF SHOWERS
AND THUNDERSTORMS.
CHANCE OF PCPN......30 PERCENT.
MAX TEMPERATURE.....AROUND 89.
MIN HUMIDITY........55 PERCENT.
WIND (20 FT)........LIGHT WINDS. GUSTY AND ERRATIC WINDS EXPECTED
NEAR THUNDERSTORMS.
MIXING HEIGHT.......4500 FT AGL.
MIXING HEIGHT (M)...1067-1372 METERS AGL.
TRANSPORT WINDS.....SOUTH 9 TO 10 MPH.
TRANSPORT WINDS M/S.SOUTH AROUND 4 METERS/SECOND.
DISPERSION INDEX....39.
LVORI...............1.
STABILITY CLASS.....3.
TIME (CDT) 3PM 4PM 5PM
SKY (%).........66 65 67
WEATHER COV.....CHC CHC CHC
WEATHER TYPE....RW RW RW
TSTM COV........CHC CHC CHC
CHC OF PCPN (%).30 30 30
TEMP............88 85 84
RH..............55 61 66
20 FT WIND DIR..S S S
20 FT WIND SPD..5 5 3
20 FT WIND GUST.10 12 10
MIX HGT (KFT)...4.5 3.5 3.5
MIX HGT (KM)....1.4 1.1 1.1
TRANSP WIND DIR.S S SSW
TRANSP WIND SPD.10 9 10
TRANS WIND DIR..S S SSW
TRANS SPD (M/S).4 4 4
DISPERSION IDX..43 34 41
LVORI...........1 1 1
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (60-70 PERCENT). CHANCE OF
SHOWERS AND THUNDERSTORMS EARLY IN THE EVENING,
THEN SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS
EARLY IN THE EVENING. PATCHY FOG OVERNIGHT.
CHANCE OF PCPN......30 PERCENT.
MIN TEMPERATURE.....AROUND 69.
MAX HUMIDITY........97 PERCENT.
WIND (20 FT)........LIGHT WINDS. GUSTY AND ERRATIC WINDS EXPECTED
NEAR THUNDERSTORMS EARLY IN THE EVENING.
MIXING HEIGHT.......400 FT AGL.
MIXING HEIGHT (M)...122-1067 METERS AGL.
TRANSPORT WINDS.....SOUTH 3 TO 9 MPH.
TRANSPORT WINDS M/S.SOUTH 1 TO 4 METERS/SECOND.
DISPERSION INDEX....39 DECREASING TO 3.
LVORI...............5.
STABILITY CLASS.....4.
TIME (CDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........71 69 68 73 58 70 71 60 71 71 68 68
WEATHER COV.....CHC SCH SCH SCH PTY PTY PTY PTY PTY
WEATHER TYPE....RW RW RW RW FOG FOG FOG FOG FOG
TSTM COV........CHC SCH SCH SCH
CHC OF PCPN (%).30 20 20 20 10 10 10 10 10 10 10 10
TEMP............83 78 75 74 73 73 72 72 72 71 71 71
RH..............71 85 90 90 93 90 93 93 90 93 93 90
20 FT WIND DIR..SSW SSW N N N N N N N N N N
20 FT WIND SPD..2 1 0 0 0 0 0 0 0 0 0 0
20 FT WIND GUST.9 8 6 5 3 3 3 2 2 2 3 3
MIX HGT (KFT)...3.5 0.7 0.5 0.5 0.5 0.4 0.5 0.4 0.4 0.4 0.4 0.4
MIX HGT (KM)....1.1 0.2 0.2 0.2 0.2 0.1 0.2 0.1 0.1 0.1 0.1 0.1
TRANSP WIND DIR.SSW SSW SSW SW SSW SSW SSW SSW S S S SSW
TRANSP WIND SPD.9 7 7 7 6 6 6 5 5 3 3 5
TRANS WIND DIR..SSW SSW SSW SW SSW SSW SSW SSW S S S SSW
TRANS SPD (M/S).4 3 3 3 3 3 3 2 2 1 1 2
DISPERSION IDX..39 3 3 3 3 3 3 2 2 2 2 2
LVORI...........3 5 6 6 6 6 6 6 6 7 7 7
THURSDAY
SKY/WEATHER.........PARTLY SUNNY (60-70 PERCENT). PATCHY FOG EARLY
IN THE MORNING. CHANCE OF SHOWERS AND SLIGHT
CHANCE OF THUNDERSTORMS IN THE MORNING, THEN
SHOWERS LIKELY AND CHANCE OF THUNDERSTORMS IN
THE AFTERNOON.
CHANCE OF PCPN......60 PERCENT.
MAX TEMPERATURE.....AROUND 88.
MIN HUMIDITY........62 PERCENT.
WIND (20 FT)........LIGHT WINDS BECOMING SOUTH AROUND 5 MPH LATE IN
THE AFTERNOON. GUSTY AND ERRATIC WINDS EXPECTED
NEAR THUNDERSTORMS LATE IN THE MORNING. GUSTY
AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS
IN THE AFTERNOON.
MIXING HEIGHT.......3900 FT AGL.
MIXING HEIGHT (M)...122-1189 METERS AGL.
TRANSPORT WINDS.....SOUTH 3 TO 12 MPH INCREASING TO AROUND 13 MPH
LATE IN THE AFTERNOON.
TRANSPORT WINDS M/S.SOUTH 1 TO 5 METERS/SECOND INCREASING TO AROUND
6 METERS/SECOND LATE IN THE AFTERNOON.
DISPERSION INDEX....6 INCREASING TO 39.
LVORI...............5.
STABILITY CLASS.....2.
TIME (CDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........78 73 66 53 47 65 56 58 54 58 63 71
WEATHER COV.....PTY SCH SCH SCH CHC CHC CHC LKY LKY LKY CHC CHC
WEATHER TYPE....FOG RNF RW RW RW RW RW RW RW RW RW RW
TSTM COV........ SCH SCH SCH CHC CHC CHC CHC CHC
CHC OF PCPN (%).10 20 20 20 40 40 40 60 60 60 40 40
TEMP............71 70 72 74 79 81 83 84 85 86 84 84
RH..............90 97 97 97 82 77 70 65 63 62 67 69
20 FT WIND DIR..N N N N S S S S S S S S
20 FT WIND SPD..0 0 0 0 1 2 3 5 6 6 6 6
20 FT WIND GUST.3 3 3 3 5 7 8 12 12 13 14 13
MIX HGT (KFT)...0.4 0.5 0.9 1.4 2.2 2.8 3.2 3.7 3.9 3.4 2.9 2.9
MIX HGT (KM)....0.1 0.2 0.3 0.4 0.7 0.9 1.0 1.1 1.2 1.0 0.9 0.9
TRANSP WIND DIR.S SSE S S S S S S S S S S
TRANSP WIND SPD.3 3 5 5 6 7 7 8 9 12 12 13
TRANS WIND DIR..S SSE S S S S S S S S S S
TRANS SPD (M/S).1 1 2 2 3 3 3 4 4 5 5 6
DISPERSION IDX..2 3 5 9 16 23 29 28 38 37 37 40
LVORI...........7 9 9 8 3 3 3 3 1 1 3 1
FORECASTER...96
REQUESTED BY...RODNEY LANDRUM
TYPE OF REQUEST...PRESCRIBED
.TAG 2614147.0/MOB
.DELDT 05/20/26
.FORMATTERVERSION 2.0.0
.EMAIL DANIEL.PATTERSON@USDA.GOV,MSMIC@FIRENET.GOV,RODNEY.LANDRUM@USDA.GOV
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