039
FNUS74 KMOB 201015
FWSMOB
SPOT FORECAST FOR DESOTO BLOCK 8301 SOUTH...USFS
NATIONAL WEATHER SERVICE MOBILE AL
515 AM CDT WED MAY 20 2026
FORECAST IS BASED ON IGNITION TIME OF 0900 CDT ON MAY 20.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
RAIN CHANCES WILL GRADUALLY INCREASE OVER THE NEXT
COUPLE OF DAYS. THERE IS A 30% CHANCE OF RAIN TODAY AND A 60%
CHANCE OF RAIN THURSDAY. AFTERNOON MINIMUM RELATIVE HUMIDITY
VALUES WILL RANGE AROUND 55% THIS AFTERNOON WITH TRANSPORT WINDS
MOSTLY SOUTHERLY TO SOUTH-SOUTHEASTERLY. AFTERNOON DISPERSION
VALUES WILL BE GENERALLY GOOD. FOR THURSDAY, THE MINIMUM RELATIVE
HUMIDITY VALUE WILL BE AROUND 65%. TRANSPORT WINDS WILL BE MOSTLY
SOUTHERLY TO SOUTH-SOUTHEASTERLY, AND DISPERSION VALUES WILL BE
GENERALLY GOOD.
FOG POTENTIAL AND OTHER REMARKS...FOG IS NOT EXPECTED EITHER
NIGHT.
REST OF TODAY
SKY/WEATHER.........PARTLY SUNNY (55-65 PERCENT). SLIGHT CHANCE OF
SHOWERS EARLY IN THE AFTERNOON. SLIGHT CHANCE
OF THUNDERSTORMS IN THE AFTERNOON. CHANCE OF
SHOWERS LATE IN THE AFTERNOON.
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 IN THE AFTERNOON.
MIXING HEIGHT.......4500 FT AGL.
MIXING HEIGHT (M)...701-1372 METERS AGL.
TRANSPORT WINDS.....SOUTH 8 TO 12 MPH.
TRANSPORT WINDS M/S.SOUTH 4 TO 5 METERS/SECOND.
DISPERSION INDEX....28 INCREASING TO 43 IN THE LATE MORNING AND
EARLY AFTERNOON, THEN DECREASING TO 39 LATE IN
THE AFTERNOON.
LVORI...............3.
STABILITY CLASS.....2.
TIME (CDT) 9 AM 11 AM 1 PM 3 PM 5 PM
SKY (%).........79 62 51 49 61
WEATHER COV..... S CHC S CHC CHANCE
WEATHER TYPE....NONE NONE RNSHWR RNSHWR RNSHWR
TSTM COV........ S CHC S CHC S CHC
CHC OF PCPN (%).0 10 20 20 30
TEMP............76 83 87 88 87
RH..............87 67 57 55 57
20 FT WIND DIR..SSE SSE S S S
20 FT WIND SPD..2 3 5 5 5
20 FT WIND GUST.6 8 10 12 10
MIX HGT (FT)....2300 3300 4300 3800 4200
MIX HGT (M).....700 1010 1310 1160 1280
TRANSP WIND DIR.SSE S S S S
TRANSP WIND SPD.9 10 9 8 8
TRANS WIND DIR..SSE S S S S
TRANS SPD (M/S).4 4 4 4 4
DISPERSION IDX..28 42 43 37 40
LVORI...........4 1 1 1 1
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (65-75 PERCENT) THEN BECOMING
PARTLY CLOUDY (45-55 PERCENT) THEN BECOMING
MOSTLY CLOUDY (50-60 PERCENT) THEN BECOMING
PARTLY CLOUDY (45-55 PERCENT). CHANCE OF
SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS
EARLY IN THE EVENING, THEN SLIGHT CHANCE OF
SHOWERS EARLY IN THE EVENING. SLIGHT CHANCE OF
SHOWERS AFTER 3 AM. PATCHY FOG AFTER 3 AM.
CHANCE OF PCPN......30 PERCENT.
MIN TEMPERATURE.....AROUND 70.
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)...122-1280 METERS AGL.
TRANSPORT WINDS.....SOUTH 3 TO 8 MPH.
TRANSPORT WINDS M/S.SOUTH 1 TO 4 METERS/SECOND.
DISPERSION INDEX....39 DECREASING TO 3.
LVORI...............5.
STABILITY CLASS.....4.
TIME (CDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM
SKY (%).........62 71 66 49 53 48
WEATHER COV.....CHANCE S CHC S CHC
WEATHER TYPE....RNSHWR RNSHWR NONE NONE NONE RN/FG
TSTM COV........S CHC
CHC OF PCPN (%).30 20 10 10 10 20
TEMP............85 77 74 72 72 71
RH..............61 82 87 93 90 90
20 FT WIND DIR..SSW SSW N N N N
20 FT WIND SPD..3 1 0 0 0 0
20 FT WIND GUST.10 6 5 3 2 2
MIX HGT (FT)....4200 500 500 500 400 400
MIX HGT (M).....1280 150 150 150 120 120
TRANSP WIND DIR.S SW SSW SSW S SSE
TRANSP WIND SPD.8 6 6 6 5 5
TRANS WIND DIR..S SW SSW SSW S SSE
TRANS SPD (M/S).4 3 3 3 2 2
DISPERSION IDX..39 3 2 3 2 2
LVORI...........3 5 6 6 7 7
THURSDAY
SKY/WEATHER.........PARTLY SUNNY (55-65 PERCENT). PATCHY FOG EARLY
IN THE MORNING. CHANCE OF SHOWERS IN THE
MORNING. CHANCE OF THUNDERSTORMS THROUGH THE
DAY. SHOWERS LIKELY IN THE AFTERNOON.
CHANCE OF PCPN......60 PERCENT.
MAX TEMPERATURE.....AROUND 88.
MIN HUMIDITY........63 PERCENT.
WIND (20 FT)........LIGHT WINDS BECOMING SOUTH 5 TO 6 MPH IN THE
AFTERNOON. GUSTY AND ERRATIC WINDS EXPECTED
NEAR THUNDERSTORMS IN THE LATE MORNING AND
AFTERNOON.
MIXING HEIGHT.......5300 FT AGL.
MIXING HEIGHT (M)...122-1615 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....4 INCREASING TO 60.
LVORI...............5.
STABILITY CLASS.....2.
TIME (CDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM
SKY (%).........60 67 65 71 57 59
WEATHER COV.....S CHC CHANCE CHANCE CHANCE LIKELY LIKELY
WEATHER TYPE....RN/FG RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR
TSTM COV........ CHANCE CHANCE CHANCE CHANCE
CHC OF PCPN (%).20 30 40 40 60 60
TEMP............71 72 79 84 85 84
RH..............90 93 79 67 65 67
20 FT WIND DIR..N N SSE SSE SSE S
20 FT WIND SPD..0 0 2 5 6 7
20 FT WIND GUST.3 3 7 12 14 15
MIX HGT (FT)....400 900 2400 3900 5300 4200
MIX HGT (M).....120 270 730 1190 1620 1280
TRANSP WIND DIR.SSE S S S S S
TRANSP WIND SPD.3 5 8 9 12 12
TRANS WIND DIR..SSE S S S S S
TRANS SPD (M/S).1 2 4 4 5 5
DISPERSION IDX..2 5 22 33 52 44
LVORI...........7 6 3 3 1 1
FORECASTER...8
REQUESTED BY...CLIFF WILLIS
TYPE OF REQUEST...PRESCRIBED
.TAG 2614081.0/MOB
.DELDT 05/20/26
.FORMATTERVERSION 2.0.0
.EMAIL CLIFTON.WILLIS@USDA.GOV
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