608  
FNUS73 KLOT 151825  
FWSLOT  
 
SPOT FORECAST FOR NIPSCO SAVANNA RX...THE NATURE CONSERVANCY  
NATIONAL WEATHER SERVICE CHICAGO IL  
125 PM CDT MON APR 15 2019  
 
FORECAST IS BASED ON IGNITION TIME OF 1400 CDT ON APRIL 15.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
 
PLEASE CONTACT OUR OFFICE AT (815) 834-0666, IF YOU HAVE QUESTIONS  
OR CONCERNS WITH THIS FORECAST.  
   
DISCUSSION
 
 
SOUTHWEST WINDS NEAR 10 MPH WILL GRADUALLY SHIFT TO SOUTHERLY THROUGH  
THE AFTERNOON. MOSTLY SUNNY SKIES WILL BECOME PARTLY CLOUDY WITH  
INCREASING MID AND HIGH LEVEL CLOUDINESS. NO PRECIPITATION IS EXPECTED  
FOR THIS AFTERNOON AND EVENING. THERE IS A SLIGHT CHANCE FOR SOME  
SCATTERED RAIN SHOWERS LATE TONIGHT.  
   
REST OF TODAY
 
 
SKY/WEATHER.........SUNNY THEN BECOMING PARTLY CLOUDY.  
TEMPERATURE.........50 AT IGNITION...MAX 52.  
RH..................50 PERCENT AT IGNITION...MIN 46 PERCENT.  
WIND (20 FT)........WINDS WEST AT 6 MPH AT IGNITION...OTHERWISE  
SOUTHWEST WINDS AROUND 7 MPH.  
CHANCE OF PCPN......0 PERCENT.  
MIXING HEIGHT.......3700 FT AGL AT IGNITION...OTHERWISE 2500-3700  
FT AGL DECREASING TO 1300 FT AGL LATE IN THE  
AFTERNOON.  
TRANSPORT WINDS.....SOUTHWEST 9 TO 12 MPH.  
MIXING TEMP 1700FT..47 EARLY IN THE AFTERNOON.  
SMOKE DISPERSAL.....GOOD /34900 KNOT-FT/ AT IGNITION. MAX...GOOD  
/34900 KNOT-FT/ DECREASING TO POOR (10000  
KNOT-FT).  
 
TIME (CDT) 2PM 3PM 4PM 5PM 6PM  
SKY (%).........11 7 9 37 50  
WEATHER COV.....  
WEATHER TYPE....  
TEMP............50 52 52 52 51  
RH..............50 48 46 48 52  
20 FT WIND DIR..W W W SW SW  
20 FT WIND SPD..6 7 7 7 7  
20 FT WIND GUST.8 10 10 10 10  
MIX HGT (KFT)...3.7 3.7 3.7 2.5 1.3  
TRANSP WIND DIR.270 260 250 240 210  
TRANSP WIND SPD.12 10 10 9 9  
CHC OF PCPN (%).0 0 0 0 0  
VRATE KT-FT/100035 34 33 21 10  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLOUDY.  
TEMPERATURE.........MIN 44.  
RH..................MAX 86 PERCENT.  
WIND (20 FT)........SOUTH WINDS 5 TO 9 MPH.  
CHANCE OF PCPN......0 PERCENT.  
MIXING HEIGHT.......100-400 FT AGL.  
TRANSPORT WINDS.....SOUTH 6 TO 15 MPH INCREASING TO 18 TO 20 MPH  
AFTER 3 AM.  
MIXING TEMP 1700FT..N/A.  
SMOKE DISPERSAL.....POOR (500 KNOT-FT).  
 
TIME (CDT) 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM 6AM  
SKY (%).........70 74 68 67 69 77 78 84 85 82 86 88  
WEATHER COV.....SCH SCH SCH SCH SCH SCH  
WEATHER TYPE....RW RW RW RW RW RW  
TEMP............50 49 48 47 47 46 46 45 45 45 45 45  
RH..............56 63 68 76 76 76 76 76 76 82 86 86  
20 FT WIND DIR..S S S S S S S S S S S S  
20 FT WIND SPD..6 5 6 6 6 6 7 8 8 9 8 9  
20 FT WIND GUST.8 6 8 8 8 8 10 12 12 14 12 14  
MIX HGT (KFT)...0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.2 0.2 0.3 0.3 0.4  
TRANSP WIND DIR.200 190 160 150 150 160 160 170 180 180 190 190  
TRANSP WIND SPD.8 7 6 6 7 7 9 13 15 18 20 20  
CHC OF PCPN (%).0 0 0 0 0 0 0 0 0 0 0 0  
VRATE KT-FT/10001 1 1 1 1 1 1 2 3 5 6 6  
   
TUESDAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY.  
TEMPERATURE.........MAX 67.  
RH..................MIN 54 PERCENT.  
WIND (20 FT)........SOUTHWEST WINDS 5 TO 10 MPH BECOMING LIGHT.  
CHANCE OF PCPN......0 PERCENT.  
MIXING HEIGHT.......100-1200 FT AGL INCREASING TO 2300-3700 FT AGL  
LATE IN THE MORNING.  
TRANSPORT WINDS.....SOUTHWEST 13 TO 22 MPH.  
MIXING TEMP 1700FT..66 LATE IN THE MORNING.  
SMOKE DISPERSAL.....POOR (1200 KNOT-FT) INCREASING TO GOOD TO  
EXCELLENT (31200-64800 KNOT-FT).  
 
TIME (CDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM  
SKY (%).........91 90 89 89 85 79 73 76 79 82 84 87  
WEATHER COV.....  
WEATHER TYPE....  
TEMP............47 49 52 56 60 64 68 69 70 70 69 68  
RH..............86 80 77 69 62 58 54 55 55 57 57 59  
20 FT WIND DIR..S S SW SW SW SW SW S SW S SW S  
20 FT WIND SPD..9 9 9 9 8 10 9 8 8 6 5 2  
20 FT WIND GUST.14 14 14 14 12 15 14 12 12 8 6  
MIX HGT (KFT)...0.4 0.3 0.2 0.1 1.2 2.3 3.4 3.5 3.6 3.7 3.2 2.7  
TRANSP WIND DIR.200 200 210 210 220 230 240 230 230 220 220 220  
TRANSP WIND SPD.20 17 15 14 16 20 22 21 18 16 15 13  
CHC OF PCPN (%).0 0 0 0 0 0 0 0 0 0 0 0  
VRATE KT-FT/10007 4 3 1 17 39 65 63 57 50 40 31  
 

 
FORECASTER...KREIN  
REQUESTED BY...STUART ORR  
TYPE OF REQUEST...PRESCRIBED  
.TAG 1906210.0/LOT  
.DELDT 04/15/19  
 
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