498  
FNUS73 KILX 281332  
FWSILX  
 
SPOT FORECAST FOR TRELEASE (EAST OLD PRAIRIE UNIT)...INHS/UIUC  
NATIONAL WEATHER SERVICE LINCOLN IL  
832 AM CDT THU MAR 28 2024  
 
FORECAST IS BASED ON IGNITION TIME OF 1000 CDT ON MARCH 28.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
 
PLEASE CONTACT OUR OFFICE AT (217) 732-3089 IF YOU HAVE QUESTIONS  
OR CONCERNS WITH THIS FORECAST.  
   
DISCUSSION
 
 
DEEP MIXING COMBINED WITH WEST-SOUTHWESTERLY WINDS OF 10-15 MPH  
SHOULD RESULT IN GOOD VENT RATES THIS AFTERNOON. MUCH OF TODAY  
WILL BE DRY, ALTHOUGH THERE IS A LOW CHANCE (15%) OF A SHOWER THIS  
EVENING.  
   
REST OF TODAY
 
 
SKY/WEATHER.........SUNNY (15-25 PERCENT) THEN BECOMING PARTLY  
SUNNY (55-65 PERCENT).  
CHANCE OF PCPN......10 PERCENT.  
LAL.................1.  
TEMPERATURE.........45 AT IGNITION...MAX 59.  
RH..................53 PERCENT AT IGNITION...MIN 37 PERCENT.  
WIND (20 FT)........WINDS SOUTHWEST AT 10 MPH AT  
IGNITION...OTHERWISE SOUTHWEST WINDS 7 TO 15  
MPH.  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH AT IGNITION...MAX 4.  
MIXING HEIGHT.......1900 FT AGL AT IGNITION...OTHERWISE 6300 FT  
AGL.  
TRANSPORT WINDS.....SOUTHWEST 10 TO 14 MPH INCREASING TO WEST 20 TO  
26 MPH IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR /17400 KNOT-FT/ AT IGNITION. MAX...VERY  
GOOD /109400 KNOT-FT/ INCREASING TO VERY GOOD  
(123500 KNOT-FT) LATE IN THE AFTERNOON.  
 
TIME (CDT) 10 AM NOON 2 PM 4 PM  
SKY (%).........20 32 4 38  
WEATHER COV.....M M M M  
WEATHER TYPE....M M M M  
TSTM COV........M M M M  
CHC OF PCPN (%).0 0 0 0  
LAL.............1 1 1 1  
TEMP............45 51 57 59  
RH..............53 44 38 37  
20 FT WIND......SW 10 SW 17 SW 17 W 18  
20 FT WIND GUST.16 24 24 25  
MIX HGT (FT)....1900 3700 5200 6300  
TRANSPORT WIND..SW 10 W 20 W 24 W 26  
HAINES INDEX....4 4 4 4  
VRATE KT-FT/1K..17 64 109 145  
VENTRATE CAT....POOR GOOD VYGD VYGD  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLOUDY (55-65 PERCENT) THEN BECOMING  
PARTLY CLOUDY (40-50 PERCENT) THEN BECOMING  
MOSTLY CLOUDY (50-60 PERCENT) THEN BECOMING  
PARTLY CLOUDY (35-45 PERCENT).  
CHANCE OF PCPN......10 PERCENT.  
LAL.................1.  
TEMPERATURE.........MIN 39.  
RH..................MAX 89 PERCENT.  
WIND (20 FT)........SOUTHWEST WINDS 5 TO 9 MPH.  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
MIXING HEIGHT.......300 FT AGL.  
TRANSPORT WINDS.....SOUTHWEST 8 TO 17 MPH.  
SMOKE DISPERSAL.....POOR (2100 KNOT-FT).  
 
TIME (CDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM  
SKY (%).........65 48 44 50 39 42  
WEATHER COV.....  
WEATHER TYPE....NONE NONE NONE NONE NONE NONE  
TSTM COV........  
CHC OF PCPN (%).10 10 10 0 0 0  
LAL.............1 1 1 1 1 1  
TEMP............57 51 47 45 43 41  
RH..............43 56 68 73 79 85  
20 FT WIND......W 12 W 12 SW 7 SW 7 SW 7 SW 7  
20 FT WIND GUST.18 18 10 10 10 10  
MIX HGT (FT)....1800 500 400 400 300 300  
TRANSPORT WIND..W 17 W 10 W 10 SW 9 SW 9 SW 9  
HAINES INDEX....4 4 4 4 4 4  
VRATE KT-FT/1K..28 4 4 3 3 3  
VENTRATE CAT....POOR POOR POOR POOR POOR POOR  
 

 
FORECASTER...ERWIN  
REQUESTED BY...NATHAN HUDSON  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2408742.0/ILX  
.DELDT 03/28/24  
.FORMATTERVERSION 2.0.0  
.EMAIL NHUDSON@ILLINOIS.EDU  
 
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