390
FNUS74 KMOB 211248
FWSMOB
SPOT FORECAST FOR DESOTO BLOCK 8301...USFS
NATIONAL WEATHER SERVICE MOBILE AL
648 AM CST SAT FEB 21 2026
FORECAST IS BASED ON IGNITION TIME OF 0700 CST ON FEBRUARY 21.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
...HIGH DISPERSION INDEX AROUND 99 EXPECTED SUNDAY AFTERNOON OVER THE
BURN AREA...
DISCUSSION
SCATTERED SHOWERS ARE POSSIBLE THIS MORNING AT THE BURN
SITE WITH NUMEROUS SHOWERS AND STORMS EXPECTED BY THIS AFTERNOON. A FEW
STRONG STORMS WITH ERRATIC, GUSTY WINDS ARE POSSIBLE TODAY. NO CHANCE
FOR RAIN ON SUNDAY. MINIMUM RELATIVE HUMIDITY REMAINS WELL ABOVE CRITICAL
THRESHOLDS TODAY, BUT FALLS TO 26-28% ON SUNDAY AFTERNOON. TRANSPORT
WINDS REMAIN SOUTHWESTERLY TO WESTERLY TODAY WHILE TURNING NORTHERLY
TONIGHT THROUGH SUNDAY. GUSTS OF 20-28 KNOTS ARE POSSIBLE ON SUNDAY AT
THE BURN SITE. AFTERNOON DISPERSION WILL BE FAIR TODAY AND GOOD ON SUNDAY.
FOG POTENTIAL AND OTHER REMARKS...FOG IS NOT EXPECTED.
REST OF TODAY
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT). CHANCE OF
SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS IN
THE MORNING, THEN SHOWERS LIKELY AND CHANCE OF
THUNDERSTORMS IN THE AFTERNOON.
CHANCE OF PCPN......70 PERCENT.
MAX TEMPERATURE.....AROUND 83.
MIN HUMIDITY........64 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 6 TO 9 MPH SHIFTING TO THE
NORTHWEST AROUND 7 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.......3100 FT AGL.
MIXING HEIGHT (M)...213-945 METERS AGL.
TRANSPORT WINDS.....SOUTHWEST 12 TO 15 MPH SHIFTING TO THE WEST
AROUND 13 MPH LATE IN THE AFTERNOON.
TRANSPORT WINDS M/S.SOUTHWEST 5 TO 7 METERS/SECOND SHIFTING TO THE
WEST AROUND 6 METERS/SECOND LATE IN THE
AFTERNOON.
DISPERSION INDEX....18 INCREASING TO 34.
LVORI...............4.
STABILITY CLASS.....3.
TIME (CST) 7 AM 9 AM 11 AM 1 PM 3 PM 5 PM
SKY (%).........87 84 65 73 60 69
WEATHER COV.....S CHC CHANCE CHANCE CHANCE LIKELY LIKELY
WEATHER TYPE....RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR
TSTM COV........ S CHC S CHC CHANCE CHANCE CHANCE
CHC OF PCPN (%).20 30 30 40 70 70
TEMP............68 73 78 81 81 77
RH..............100 94 75 68 66 72
20 FT WIND DIR..SSW SW SW WSW WSW WNW
20 FT WIND SPD..7 8 8 10 10 8
20 FT WIND GUST.17 16 16 18 17 15
MIX HGT (FT)....700 1800 2700 2600 3100 3100
MIX HGT (M).....210 550 820 790 940 940
TRANSP WIND DIR.SSW SW SW WSW WSW W
TRANSP WIND SPD.12 14 15 13 15 13
TRANS WIND DIR..SSW SW SW WSW WSW W
TRANS SPD (M/S).5 6 7 6 7 6
DISPERSION IDX..14 25 32 29 36 31
LVORI...........5 5 3 3 3 3
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (60-70 PERCENT) THEN BECOMING
PARTLY CLOUDY (20-30 PERCENT) THEN BECOMING
CLEAR (0-10 PERCENT). CHANCE OF SHOWERS AND
THUNDERSTORMS EARLY IN THE EVENING, THEN SLIGHT
CHANCE OF RAIN SHOWERS LATE IN THE EVENING.
CHANCE OF PCPN......50 PERCENT.
MIN TEMPERATURE.....AROUND 43.
MAX HUMIDITY........90 PERCENT.
WIND (20 FT)........NORTH WINDS 6 TO 13 MPH. GUSTS UP TO 31 MPH
EARLY IN THE EVENING. GUSTY AND ERRATIC WINDS
EXPECTED NEAR THUNDERSTORMS EARLY IN THE
EVENING.
MIXING HEIGHT.......700 FT AGL.
MIXING HEIGHT (M)...213-671 METERS AGL.
TRANSPORT WINDS.....NORTHWEST 12 TO 20 MPH SHIFTING TO THE NORTH 22
TO 26 MPH IN THE LATE EVENING AND OVERNIGHT.
TRANSPORT WINDS M/S.NORTH 6 TO 12 METERS/SECOND INCREASING TO 10 TO
12 METERS/SECOND IN THE LATE EVENING AND
OVERNIGHT.
DISPERSION INDEX....9 INCREASING TO 20 EARLY IN THE EVENING, THEN
INCREASING TO 31 IN THE LATE EVENING AND
OVERNIGHT DECREASING TO 23 AFTER 3 AM.
LVORI...............4.
STABILITY CLASS.....4.
TIME (CST) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM
SKY (%).........67 67 68 51 19 6
WEATHER COV.....CHANCE CHANCE S CHC
WEATHER TYPE....RNSHWR RNSHWR RNSHWR NONE NONE NONE
TSTM COV........CHANCE CHANCE
CHC OF PCPN (%).50 50 20 0 0 0
TEMP............71 68 64 59 54 47
RH..............87 90 84 79 71 73
20 FT WIND DIR..NW NNW NNW NNW N N
20 FT WIND SPD..7 9 13 15 15 15
20 FT WIND GUST.15 22 25 29 31 31
MIX HGT (FT)....700 1400 1800 2100 1700 1200
MIX HGT (M).....210 430 550 640 520 370
TRANSP WIND DIR.WNW NNW NNW NNW N N
TRANSP WIND SPD.12 17 25 25 25 23
TRANS WIND DIR..WNW NNW NNW NNW N N
TRANS SPD (M/S).5 8 11 11 11 10
DISPERSION IDX..8 18 29 34 29 24
LVORI...........5 4 4 3 3 3
SUNDAY
SKY/WEATHER.........SUNNY (0-10 PERCENT).
CHANCE OF PCPN......0 PERCENT.
MAX TEMPERATURE.....AROUND 57.
MIN HUMIDITY........28 PERCENT.
WIND (20 FT)........NORTH WINDS 12 TO 14 MPH WITH GUSTS TO AROUND
31 MPH.
MIXING HEIGHT.......5300 FT AGL.
MIXING HEIGHT (M)...396-1615 METERS AGL.
TRANSPORT WINDS.....NORTH 23 TO 32 MPH DECREASING TO AROUND 23 MPH
LATE IN THE AFTERNOON.
TRANSPORT WINDS M/S.NORTH 10 TO 14 METERS/SECOND DECREASING TO
AROUND 10 METERS/SECOND LATE IN THE AFTERNOON.
DISPERSION INDEX....37 INCREASING TO 53 EARLY IN THE MORNING, THEN
INCREASING TO 69 LATE IN THE MORNING INCREASING
TO 83 LATE IN THE MORNING INCREASING TO 96
DECREASING TO 85 LATE IN THE AFTERNOON.
LVORI...............2.
STABILITY CLASS.....3.
TIME (CST) 6 AM 8 AM 10 AM NOON 2 PM 4 PM
SKY (%).........1 4 2 3 4 5
WEATHER COV.....
WEATHER TYPE....NONE NONE NONE NONE NONE NONE
TSTM COV........
CHC OF PCPN (%).0 0 0 0 0 0
TEMP............44 44 48 53 56 54
RH..............68 62 46 33 28 30
20 FT WIND DIR..N N N NNW NNW NNW
20 FT WIND SPD..14 15 16 16 16 15
20 FT WIND GUST.31 31 30 31 31 29
MIX HGT (FT)....1300 2200 3300 4400 5000 5300
MIX HGT (M).....400 670 1010 1340 1520 1620
TRANSP WIND DIR.N N N N NNW NNW
TRANSP WIND SPD.23 26 31 32 32 28
TRANS WIND DIR..N N N N NNW NNW
TRANS SPD (M/S).10 12 14 14 14 13
DISPERSION IDX..34 53 79 92 100 84
LVORI...........3 1 1 1 1 1
FORECASTER...7
REQUESTED BY...CLIFF WILLIS
TYPE OF REQUEST...PRESCRIBED
.TAG 2602859.4/MOB
.DELDT 02/21/26
.FORMATTERVERSION 2.0.0
.EMAIL CLIFTON.WILLIS@USDA.GOV
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