823  
FNUS74 KMOB 201429  
FWSMOB  
 
SPOT FORECAST FOR DE SOTO 7310...USFS  
NATIONAL WEATHER SERVICE MOBILE AL  
829 AM CST TUE FEB 20 2018  
 
FORECAST IS BASED ON IGNITION TIME OF 0900 CST ON FEBRUARY 20.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
SOUTHEAST TO SOUTHERLY FLOW IN THE MIXING LAYER WILL  
INCREASE AND KEEP HIGH DAYTIME MOISTURE LEVELS HIGH THROUGH MID WEEK.  
RAIN CHANCES WILL BE ON THE INCREASE INTO WEDNESDAY.  
 
FOG POTENTIAL AND OTHER REMARKS...FOG DEVELOPMENT IS LIKELY TONIGHT, WITH  
DENSE FOG LIKELY LIMITING VISIBILITIES TO LESS THAN ONE MILE.  
   
REST OF TODAY
 
 
SKY/WEATHER.........PARTLY SUNNY (60-70 PERCENT). CHANCE OF  
SHOWERS.  
CHANCE OF PCPN......40 PERCENT.  
MAX TEMPERATURE.....AROUND 82.  
MIN HUMIDITY........61 PERCENT.  
WIND (20 FT)........SOUTHEAST WINDS 6 TO 8 MPH.  
MIXING HEIGHT.......1800-3200 FT AGL.  
MIXING HEIGHT (M)...549-975 METERS AGL.  
TRANSPORT WINDS.....SOUTH 16 TO 23 MPH.  
TRANSPORT WINDS M/S.SOUTH 7 TO 10 METERS/SECOND.  
DISPERSION INDEX....40 INCREASING TO 52 LATE IN THE MORNING, THEN  
DECREASING TO 42 LATE IN THE AFTERNOON.  
LVORI...............3.  
STABILITY CLASS.....3.  
 
TIME (CST) 9 AM 11 AM 1 PM 3 PM 5 PM  
SKY (%).........63 65 65 63 68  
WEATHER COV.....CHANCE CHANCE CHANCE CHANCE CHANCE  
WEATHER TYPE....RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR  
TSTM COV........  
CHC OF PCPN (%).30 30 40 40 40  
TEMP............72 79 82 81 78  
RH..............84 67 61 63 69  
20 FT WIND DIR..SE SE S S SE  
20 FT WIND SPD..6 6 7 7 6  
20 FT WIND GUST.7 10 10 10 7  
MIX HGT (FT)....1800 2600 3100 3200 3200  
MIX HGT (M).....550 790 940 980 980  
TRANSP WIND DIR.S S S S S  
TRANSP WIND SPD.22 23 23 22 16  
TRANS WIND DIR..S S S S S  
TRANS SPD (M/S).10 10 10 10 7  
DISPERSION IDX..36 49 55 53 42  
LVORI...........4 2 1 1 2  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT). CHANCE OF  
SHOWERS IN THE EVENING, THEN SLIGHT CHANCE OF  
SHOWERS AFTER MIDNIGHT.  
CHANCE OF PCPN......30 PERCENT.  
MIN TEMPERATURE.....AROUND 65.  
MAX HUMIDITY........100 PERCENT.  
WIND (20 FT)........SOUTHEAST WINDS AROUND 5 MPH EARLY IN THE  
EVENING BECOMING LIGHT.  
MIXING HEIGHT.......900-1500 FT AGL.  
MIXING HEIGHT (M)...274-457 METERS AGL.  
TRANSPORT WINDS.....SOUTHEAST 9 TO 14 MPH.  
TRANSPORT WINDS M/S.SOUTHEAST 4 TO 6 METERS/SECOND.  
DISPERSION INDEX....9.  
LVORI...............6.  
STABILITY CLASS.....4.  
 
TIME (CST) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM  
SKY (%).........70 78 79 75 75 75  
WEATHER COV.....CHANCE CHANCE CHANCE S CHC S CHC S CHC  
WEATHER TYPE....RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR  
TSTM COV........  
CHC OF PCPN (%).30 30 30 20 20 20  
TEMP............76 71 68 68 67 66  
RH..............74 90 100 97 100 100  
20 FT WIND DIR..SE SE SE SE SE SE  
20 FT WIND SPD..5 4 4 4 3 3  
20 FT WIND GUST.6 6 6 6 4 4  
MIX HGT (FT)....1500 900 900 900 900 900  
MIX HGT (M).....460 270 270 270 270 270  
TRANSP WIND DIR.S S SE S S S  
TRANSP WIND SPD.14 12 10 9 10 9  
TRANS WIND DIR..S S SE S S S  
TRANS SPD (M/S).6 5 4 4 4 4  
DISPERSION IDX..11 8 8 7 7 7  
LVORI...........3 5 8 8 8 8  
   
WEDNESDAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT). CHANCE OF  
SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS.  
CHANCE OF PCPN......50 PERCENT.  
MAX TEMPERATURE.....AROUND 82.  
MIN HUMIDITY........65 PERCENT.  
WIND (20 FT)........LIGHT WINDS BECOMING SOUTHEAST 5 TO 7 MPH IN  
THE LATE MORNING AND AFTERNOON. GUSTY AND  
ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS.  
MIXING HEIGHT.......900-2800 FT AGL INCREASING TO 2900-3200 FT AGL  
IN THE AFTERNOON.  
MIXING HEIGHT (M)...274-853 METERS AGL INCREASING TO 884-975 METERS  
AGL IN THE AFTERNOON.  
TRANSPORT WINDS.....SOUTH 9 TO 18 MPH.  
TRANSPORT WINDS M/S.SOUTH 4 TO 8 METERS/SECOND.  
DISPERSION INDEX....14 INCREASING TO 45.  
LVORI...............4.  
STABILITY CLASS.....3.  
 
TIME (CST) 6 AM 10 AM 2 PM  
SKY (%).........73 76 78  
WEATHER COV.....CHANCE CHANCE CHANCE  
WEATHER TYPE....RNSHWR RNSHWR RNSHWR  
TSTM COV........S CHC S CHC S CHC  
CHC OF PCPN (%).40 40 50  
TEMP............65 76 82  
RH..............100 79 65  
20 FT WIND DIR..SE SE S  
20 FT WIND SPD..3 6 6  
20 FT WIND GUST.4 7 10  
MIX HGT (FT)....900 2100 3000  
MIX HGT (M).....270 640 910  
TRANSP WIND DIR.SE S S  
TRANSP WIND SPD.9 18 17  
TRANS WIND DIR..SE S S  
TRANS SPD (M/S).4 8 8  
DISPERSION IDX..11 35 43  
LVORI...........6 3 1  
 

 
FORECASTER...16  
REQUESTED BY...JAY BOYKIN  
TYPE OF REQUEST...PRESCRIBED  
.TAG 1802198.0/MOB  
.EMAIL JAYBOYKIN@FS.FED.US  
 
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