185  
FNUS73 KLMK 141009  
FWSLMK  
 
SPOT FORECAST FOR RATTLESNAKE...HOOSIER NATIONAL FOREST  
NATIONAL WEATHER SERVICE LOUISVILLE, KY  
609 AM EDT WED APR 14 2021  
 
FORECAST IS BASED ON IGNITION TIME OF 1000 CDT ON APRIL 14.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
 
EXPECT A CLOUDY AND COOL DAY WITH LIGHT WINDS FROM THE WEST OR  
NORTHWEST. A FEW SHOWERS OR SPRINKLES WILL BE POSSIBLE THIS  
MORNING, BUT WILL BARELY AMOUNT TO MORE THAN A TRACE. POOR SMOKE  
DISPERSAL THIS MORNING WILL IMPROVE IN THE MID TO LATE AFTERNOON.  
SKIES WILL CLEAR TONIGHT BUT COOL TEMPERATURES WILL PERSIST ON  
THURSDAY. STRONGER WINDS FROM THE NW AND DEEPER MIXING WILL  
IMPROVE SMOKE DISPERSAL.  
   
REST OF TODAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT) THEN BECOMING  
MOSTLY SUNNY (35-45 PERCENT). SLIGHT CHANCE OF  
RAIN SHOWERS LATE IN THE MORNING.  
TEMPERATURE.........MAX 62.  
RH..................MIN 38 PERCENT.  
WIND (20 FT)........LIGHT WINDS BECOMING WEST 5 TO 6 MPH LATE IN  
THE AFTERNOON.  
MIXING HEIGHT.......1000 FT AGL IN THE MORNING...  
MAX 4200-4400 FT AGL LATE IN THE AFTERNOON.  
TRANSPORT WINDS.....NORTHWEST 3 MPH INCREASING TO 10 MPH.  
SMOKE DISPERSAL.....POOR (3000 KT-FT) AT IGNITION...  
MAX...FAIR (39500 KNOT-FT) LATE IN THE  
AFTERNOON.  
LVORI...............2.  
ADI.................8 INCREASING TO 40.  
 
TIME (EDT) 10A 11A 12P 1PM 2PM 3PM 4PM  
SKY (%).........91 90 88 87 71 55 38  
WEATHER COV.....SCH SCH CHC  
WEATHER TYPE....RW RW RW  
TSTM COV........  
TEMP............54 56 57 59 60 62 62  
RH..............60 55 52 47 44 39 38  
20 FT WIND DIR..N N NW NW NW W W  
20 FT WIND SPD..2 2 3 3 5 5 6  
20 FT WIND GUST.4 4 4 5 6 6  
MIX HGT (KFT)...1.0 1.4 1.9 2.5 2.9 4.2 4.4  
TRANSP WIND DIR.W W NW NW NW NW NW  
TRANSP WIND SPD.3 6 6 7 8 8 10  
LVORI...........3 2 2 2 2 2 1  
ADI.............4 11 11 15 19 23 40  
SDSPL KT-FT/10003 7 9 15 21 29 40  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY (25-35 PERCENT).  
TEMPERATURE.........MIN 38.  
RH..................MAX 79 PERCENT.  
WIND (20 FT)........NORTHWEST WINDS 5 TO 6 MPH IN THE EVENING  
BECOMING LIGHT, THEN BECOMING NORTHWEST 5 TO 6  
MPH AFTER MIDNIGHT.  
MIXING HEIGHT.......2300-4000 FT AGL DECREASING TO 100-200 FT AGL  
EARLY IN THE EVENING.  
TRANSPORT WINDS.....NORTHWEST 6 TO 10 MPH.  
SMOKE DISPERSAL.....POOR TO MARGINAL (500-36000 KNOT-FT).  
LVORI...............2.  
ADI.................39 DECREASING TO 4.  
 
TIME (EDT) 5PM 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM  
SKY (%).........35 32 28 31 35 38 34 30 26 30 33 37  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
TEMP............61 60 58 55 52 50 48 47 46 44 43 42  
RH..............39 40 42 47 52 56 59 62 63 66 69 71  
20 FT WIND DIR..W NW NW NW NW NW NW NW NW NW NW NW  
20 FT WIND SPD..6 6 5 5 5 3 5 5 6 5 5 5  
20 FT WIND GUST. 6 6 5 6 6 6 6 6  
MIX HGT (KFT)...4.0 2.3 0.2 0.2 0.1 0.1 0.1 0.1 0.2 0.2 0.2 0.2  
TRANSP WIND DIR.NW NW NW NW NW NW NW NW NW NW NW NW  
TRANSP WIND SPD.10 9 6 6 6 6 6 7 7 7 6 6  
LVORI...........1 2 2 2 2 3 3 3 3 3 3 3  
ADI.............39 4 3 3 3 3 3 3 3 3 3 3  
SDSPL KT-FT/100036 18 1 1 1 1 1 1 1 1 1 1  
   
THURSDAY
 
 
SKY/WEATHER.........SUNNY (10-20 PERCENT).  
TEMPERATURE.........MAX 60.  
RH..................MIN 37 PERCENT.  
WIND (20 FT)........NORTHWEST WINDS AROUND 5 MPH EARLY IN THE  
MORNING BECOMING LIGHT, THEN BECOMING NORTHWEST  
5 TO 6 MPH IN THE LATE MORNING AND AFTERNOON.  
MIXING HEIGHT.......MAX 6000-6400 FT AGL IN THE AFTERNOON.  
TRANSPORT WINDS.....NORTHWEST 6 TO 14 MPH INCREASING TO 14 TO 16  
MPH LATE IN THE MORNING.  
SMOKE DISPERSAL.....GOOD (55500-81200 KNOT-FT) FROM LATE MORNING  
THROUGH THE AFTERNOON.  
LVORI...............3.  
ADI.................60 TO 67 IN THE LATE MORNING AND AFTERNOON.  
 
TIME (EDT) 5AM 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM  
SKY (%).........27 18 2 2 3 9 6 14 13 16 17 17  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
TEMP............41 40 38 42 47 50 53 55 56 58 59 59  
RH..............73 75 79 67 56 50 44 41 40 37 37 37  
20 FT WIND DIR..NW NW NW NW NW NW NW NW NW NW NW NW  
20 FT WIND SPD..5 5 2 3 5 6 6 6 6 6 6 6  
20 FT WIND GUST.6 6 6 8 9 10 10 11 11 11 10 10  
MIX HGT (KFT)...0.2 0.2 0.3 1.5 2.8 4.0 4.5 5.0 5.4 6.0 6.4 6.2  
TRANSP WIND DIR.NW NW NW NW NW NW NW NW NW NW NW NW  
TRANSP WIND SPD.6 7 7 10 14 16 16 15 15 15 15 14  
LVORI...........3 4 4 3 1 1 1 1 1 1 1 1  
ADI.............3 5 7 20 42 60 63 62 64 67 67 63  
SDSPL KT-FT/10001 1 2 13 33 56 63 65 70 78 81 75  
 

 
FORECASTER...RAS  
REQUESTED BY...JEREMY KOLAKS  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2108988.0/LMK  
.DELDT 04/14/21  
.EMAIL JEREMY.KOLAKS@USDA.GOV  
 
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