218  
FNAK77 PAJK 201153  
FWSAJK  
 
SPOT FORECAST FOR DREDGE LAKES RX BURN...US FOREST SERVICE  
NATIONAL WEATHER SERVICE JUNEAU AK  
353 AM AKDT WED SEP 20 2017  
 
FORECAST IS BASED ON IGNITION TIME OF 0700 AKDT ON SEPTEMBER 20.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
 
PLEASE CONTACT OUR OFFICE AT (907) 790-6824, IF YOU HAVE QUESTIONS  
OR CONCERNS WITH THIS FORECAST.  
   
DISCUSSION
 
 
QUIET AND DRY WEATHER PATTERN FOR THE NEXT TWO DAYS AS A RIDGE OF  
HIGH PRESSURE OVER THE GULF OF ALASKA AND AN INVERTED TROUGH OVER  
THE SOUTHERN PANHANDLE PRODUCES LIGHT OFFSHORE FLOW OVER THE  
INNER CHANNELS. THE LEAST CLOUD COVER, HIGHEST TEMPERATURES (MID  
60S), AND LOWEST HUMIDITY (AROUND 60 PERCENT) IS EXPECTED WED  
BEFORE A FRONT APPROACHING FROM THE W BRINGS INCREASING CLOUDS  
AND COOLER WEATHER FOR LATE WED NIGHT AND THU. RAIN IS EXPECTED  
FOR THU NIGHT AS THE FRONT MOVES THROUGH THE AREA. WINDS WILL  
REMAIN LESS THEN 10 MPH THROUGH THU. SOME PATCHY FOG IS POSSIBLE  
EARLY WED MORNING AND LATE WED NIGHT.  
   
TODAY
 
 
SKY/WEATHER.........SUNNY (5-15 PERCENT). PATCHY FOG EARLY IN THE  
MORNING.  
CWR.................0 PERCENT.  
MAX TEMPERATURE.....AROUND 66.  
MIN HUMIDITY........59 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......LIGHT WINDS.  
MIXING HEIGHT.......300 FT AGL INCREASING TO 8700 FT AGL IN THE  
LATE MORNING AND EARLY AFTERNOON, THEN  
DECREASING TO 3700 FT AGL LATE IN THE  
AFTERNOON.  
TRANSPORT WINDS.....NORTH 3 TO 6 MPH SHIFTING TO THE WEST AROUND 2  
MPH LATE IN THE AFTERNOON.  
RAINFALL AMOUNT.....0.00 INCHES.  
 
TIME (AKDT) 7 AM 10 AM 1 PM 4 PM  
SKY (%).........10 5 2 4  
WEATHER COV.....PATCHY  
WEATHER TYPE....FOG NONE NONE NONE  
TSTM COV........  
CWR.............0 0 0 0  
TEMP............40 52 65 62  
RH..............100 78 60 66  
20 FT WIND......E 1G5 SE 2G5 SW 2G5 SW 2G5  
MIX HGT (FT)....300 8700 8700 3700  
TRANSPORT WIND..NE 6 NE 3 N 3 W 2  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR (10-20 PERCENT) THEN BECOMING  
MOSTLY CLOUDY (50-60 PERCENT). PATCHY FOG IN  
THE LATE EVENING AND OVERNIGHT.  
CWR.................0 PERCENT.  
MIN TEMPERATURE.....AROUND 42.  
MAX HUMIDITY........100 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......SOUTHWEST AROUND 5 MPH IN THE EVENING,  
THEN BECOMING LIGHT IN THE LATE EVENING.  
MIXING HEIGHT.......3700 FT AGL DECREASING TO 300 FT AGL IN THE  
LATE EVENING AND EARLY MORNING, THEN INCREASING  
TO 2400 FT AGL EARLY IN THE MORNING.  
TRANSPORT WINDS.....WEST 2 MPH SHIFTING TO THE NORTH  
3 MPH IN THE LATE EVENING AND OVERNIGHT.  
RAINFALL AMOUNT.....0.00 INCHES.  
 
TIME (AKDT) 6 PM 9 PM MIDNGT 3 AM  
SKY (%).........4 4 10 28  
WEATHER COV..... PATCHY PATCHY  
WEATHER TYPE....NONE NONE FOG FOG  
TSTM COV........  
CWR.............0 0 0 0  
TEMP............54 48 46 44  
RH..............84 97 100 100  
20 FT WIND......SW 4G10 SW 2G5 NE 2G5 NE 2G5  
MIX HGT (FT)....3700 3700 300 300  
TRANSPORT WIND..W 2 NW 1 N 3 N 2  
   
THURSDAY
 
 
SKY/WEATHER.........PARTLY SUNNY (65-75 PERCENT). PATCHY FOG EARLY  
IN THE MORNING.  
CWR.................0 PERCENT.  
MAX TEMPERATURE.....AROUND 60.  
MIN HUMIDITY........68 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......EAST WINDS AROUND 6 MPH SHIFTING TO THE  
SOUTHWEST 7 MPH IN THE LATE MORNING AND  
AFTERNOON.  
MIXING HEIGHT.......2400 FT AGL INCREASING TO 6800 FT AGL IN THE  
LATE MORNING AND EARLY AFTERNOON, THEN  
DECREASING TO 4000 FT AGL LATE IN THE  
AFTERNOON.  
TRANSPORT WINDS.....NORTHWEST 2 MPH SHIFTING TO THE SOUTHWEST  
3 MPH IN THE AFTERNOON.  
RAINFALL AMOUNT.....0.00 INCHES.  
 
TIME (AKDT) 6 AM 9 AM NOON 3 PM  
SKY (%).........56 63 62 76  
WEATHER COV.....PATCHY PATCHY  
WEATHER TYPE....FOG FOG NONE NONE  
TSTM COV........  
CWR.............0 0 0 0  
TEMP............42 50 59 58  
RH..............100 92 69 73  
20 FT WIND......E 5G10 E 5G10 S 5G10 SW 5G10  
MIX HGT (FT)....2400 2400 6800 6800  
TRANSPORT WIND..N 2 N 2 NW 1 W 2  
 

 
FORECASTER...LISKE  
REQUESTED BY...MATTHEW THOMPSON  
TYPE OF REQUEST...PRESCRIBED  
.TAG 1716039.0/AJK  
.EMAIL MCTHOMPSON@FS.FED.US  
 
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