478
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
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