395
FNUS74 KMOB 202023
FWSMOB
SPOT FORECAST FOR DESOTO SITE PREP COMP. 20...USFS
NATIONAL WEATHER SERVICE MOBILE AL
323 PM CDT WED OCT 20 2021
FORECAST IS BASED ON IGNITION TIME OF 1600 CDT ON OCTOBER 20.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
...LOW DISPERSION INDEX AROUND 20 EXPECTED THURSDAY AFTERNOON OVER THE
BURN AREA...
DISCUSSION
FOR THE REST OF THIS AFTERNOON, EXPECT FAIR DISPERSIONS WITH
ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS ACROSS THE AREA.
PRECIPITATION CHANCES INCREASE FOR THURSDAY, WITH SCATTERED TO AT
TIMES NUMEROUS SHOWER AND THUNDERSTORM COVERAGE EXPECTED. MINIMUM
RELATIVE HUMIDITY VALUES REMAIN WELL ABOVE CRITICAL THRESHOLDS.
SOUTHEAST TRANSPORT WINDS TODAY BECOME SOUTHERLY FOR THURSDAY
MORNING, THEN WESTERLY BY THURSDAY AFTERNOON AND EVENING.
FOG POTENTIAL AND OTHER REMARKS...SOME PATCHY FOG BECOMES POSSIBLE
OVERNIGHT TONIGHT INTO THURSDAY MORNING, WITH LOCAL REDUCTIONS IN
VISIBILITY POSSIBLE.
REST OF TODAY
SKY/WEATHER.........MOSTLY CLOUDY (80-90 PERCENT). SHOWERS LIKELY
AND CHANCE OF THUNDERSTORMS.
CHANCE OF PCPN......60 PERCENT.
LAL.................9-15 STRIKES.
MAX TEMPERATURE.....AROUND 79.
MIN HUMIDITY........72 PERCENT.
WIND (20 FT)........SOUTHEAST WINDS AROUND 5 MPH. GUSTY AND ERRATIC
WINDS EXPECTED NEAR THUNDERSTORMS.
MIXING HEIGHT.......1800 FT AGL.
MIXING HEIGHT (M)...549 METERS AGL.
TRANSPORT WINDS.....SOUTHEAST AROUND 15 MPH.
TRANSPORT WINDS M/S.SOUTHEAST AROUND 7 METERS/SECOND.
DISPERSION INDEX....26.
LVORI...............3.
STABILITY CLASS.....4.
TIME (CDT) 4 PM
SKY (%).........87
WEATHER COV.....LIKELY
WEATHER TYPE....RNSHWR
TSTM COV........CHANCE
CHC OF PCPN (%).60
LAL.............3
TEMP............76
RH..............82
20 FT WIND DIR..SE
20 FT WIND SPD..5
20 FT WIND GUST.7
MIX HGT (FT)....1800
MIX HGT (M).....550
TRANSP WIND DIR.SE
TRANSP WIND SPD.15
TRANS WIND DIR..SE
TRANS SPD (M/S).7
DISPERSION IDX..26
LVORI...........3
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (80-90 PERCENT). SHOWERS LIKELY
AND CHANCE OF THUNDERSTORMS EARLY IN THE
EVENING, THEN CHANCE OF SHOWERS AND SLIGHT
CHANCE OF THUNDERSTORMS. PATCHY FOG OVERNIGHT.
CHANCE OF PCPN......60 PERCENT.
LAL.................9-15 STRIKES UNTIL 1900, THEN 1-8 STRIKES.
MIN TEMPERATURE.....AROUND 67.
MAX HUMIDITY........100 PERCENT.
WIND (20 FT)........LIGHT WINDS. GUSTY AND ERRATIC WINDS EXPECTED
NEAR THUNDERSTORMS.
MIXING HEIGHT.......200 FT AGL.
MIXING HEIGHT (M)...61-549 METERS AGL.
TRANSPORT WINDS.....SOUTHEAST 6 TO 15 MPH DECREASING TO 1 TO 5 MPH
EARLY IN THE EVENING.
TRANSPORT WINDS M/S.SOUTHEAST 0 TO 3 METERS/SECOND.
DISPERSION INDEX....26 DECREASING TO 3.
LVORI...............7.
STABILITY CLASS.....4.
TIME (CDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM
SKY (%).........86 87 83 78 76 77
WEATHER COV.....LIKELY CHANCE CHANCE CHANCE CHANCE CHANCE
WEATHER TYPE....RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR
TSTM COV........CHANCE S CHC S CHC S CHC S CHC S CHC
CHC OF PCPN (%).60 40 40 40 50 50
LAL.............3 2 2 2 2 2
TEMP............73 71 68 70 68 68
RH..............90 97 100 97 100 100
20 FT WIND DIR..SE SE SE SE SE SSE
20 FT WIND SPD..4 3 3 3 2 1
20 FT WIND GUST.6 5 4 4 2
MIX HGT (FT)....1800 300 300 300 300 200
MIX HGT (M).....550 90 90 90 90 60
TRANSP WIND DIR.SE SE SE SE SE SSE
TRANSP WIND SPD.15 5 5 5 3 2
TRANS WIND DIR..SE SE SE SE SE SSE
TRANS SPD (M/S).7 2 2 2 1 1
DISPERSION IDX..26 4 3 3 2 2
LVORI...........4 9 9 9 9 10
THURSDAY
SKY/WEATHER.........PARTLY SUNNY (60-70 PERCENT). PATCHY FOG EARLY
IN THE MORNING. SHOWERS LIKELY AND CHANCE OF
THUNDERSTORMS THROUGH THE DAY.
CHANCE OF PCPN......60 PERCENT.
LAL.................1-8 STRIKES UNTIL 0700, THEN 9-15 STRIKES.
MAX TEMPERATURE.....AROUND 82.
MIN HUMIDITY........67 PERCENT.
WIND (20 FT)........LIGHT WINDS. GUSTY AND ERRATIC WINDS EXPECTED
NEAR THUNDERSTORMS EARLY IN THE MORNING. GUSTY
AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS.
MIXING HEIGHT.......3800 FT AGL.
MIXING HEIGHT (M)...61-1158 METERS AGL.
TRANSPORT WINDS.....SOUTHEAST 1 TO 2 MPH SHIFTING TO THE WEST 5 TO
8 MPH IN THE LATE MORNING AND AFTERNOON.
TRANSPORT WINDS M/S.SOUTHEAST AROUND 0 METERS/SECOND BECOMING 0 TO
1 METERS/SECOND EARLY IN THE MORNING, THEN
SHIFTING TO THE WEST 2 TO 4 METERS/SECOND IN
THE LATE MORNING AND AFTERNOON.
DISPERSION INDEX....4 INCREASING TO 18 IN THE LATE MORNING AND
AFTERNOON.
LVORI...............7.
STABILITY CLASS.....2.
TIME (CDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM
SKY (%).........77 74 69 63 57 52
WEATHER COV.....CHANCE LIKELY LIKELY LIKELY CHANCE CHANCE
WEATHER TYPE....RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR
TSTM COV........S CHC CHANCE CHANCE CHANCE CHANCE CHANCE
CHC OF PCPN (%).50 60 60 60 40 40
LAL.............2 3 3 3 3 3
TEMP............67 68 75 78 82 82
RH..............100 100 90 79 67 67
20 FT WIND DIR..SE SSE SSW WSW WSW SW
20 FT WIND SPD..1 1 2 3 3 2
20 FT WIND GUST.2 2 4 4
MIX HGT (FT)....200 500 1300 3000 3500 2900
MIX HGT (M).....60 150 400 910 1070 880
TRANSP WIND DIR.SE SSE WSW W W WSW
TRANSP WIND SPD.1 2 7 7 6 5
TRANS WIND DIR..SE SSE WSW W W WSW
TRANS SPD (M/S).0 1 3 3 3 2
DISPERSION IDX..1 3 13 21 20 18
LVORI...........10 9 5 3 3 3
FORECASTER...25
REQUESTED BY...CLIFF WILLIS
TYPE OF REQUEST...PRESCRIBED
.TAG 2119768.1/MOB
.DELDT 10/20/21
.FORMATTERVERSION 1.0.26
.EMAIL CLIFTON.WILLIS@USDA.GOV
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