832
FNUS73 KPAH 111713
FWSPAH
SPOT FORECAST FOR RAUCHFUSS HILL UNIT B...ILLINOIS DNR
NATIONAL WEATHER SERVICE PADUCAH KY
1113 AM CST SUN JAN 11 2026
FORECAST IS BASED ON IGNITION TIME OF 1100 CST ON JANUARY 12.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
MIXING HEIGHTS ARE EXPECTED TO BE LOWER THAN TODAY AT THE BURN
SITE AS TEMPERATURES WARM JUST ABOVE THE SURFACE. WINDS ARE ALSO
EXPECTED TO DECREASE AS HIGH PRESSURE LINGERS NEARBY THROUGH THE
DAY MONDAY. THE COMBINATION OF THOSE FEATURES WILL LEAD TO POOR TO
FAIR SMOKE DISPERSION DURING THE BURN. RELATIVE HUMIDITY VALUES
WILL INCREASE MONDAY AS SOUTHERLY FLOW RETURNS TO THE QUAD STATE
AREA. HUMIDITY VALUES WILL LIKELY REMAIN IN THE 35-45% RANGE.
THERE IS ONLY ABOUT A 20% CHANCE THAT RELATIVE HUMIDITY VALUES
DROP LOWER THAN 35% MONDAY AFTERNOON. RECOVERIES MONDAY NIGHT ARE
EXPECTED TO BE AROUND 85%.
MONDAY
SKY/WEATHER.........SUNNY (0-10 PERCENT).
CWR.................0 PERCENT.
TEMPERATURE.........42 AT IGNITION...MAX 48.
RH..................46 PERCENT AT IGNITION...MIN 40 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......WINDS SOUTHWEST AT 8 MPH AT
IGNITION...OTHERWISE SOUTHWEST WINDS 5 TO 7 MPH
LATE IN THE MORNING BECOMING LIGHT.
MIXING HEIGHT.......1900 FT AGL AT IGNITION...OTHERWISE 2300 FT
AGL.
TRANSPORT WINDS.....SOUTHWEST 17 TO 24 MPH.
SMOKE DISPERSAL.....POOR /39700 KNOT-FT/ AT IGNITION. MAX...FAIR
/44600 KNOT-FT/.
TIME (CST) 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY COVER.......CLR CLR MCR MCR CLR MCR MCR
WEATHER COV.....M M M M M M M
WEATHER TYPE....M M M M M M M
TSTM COV........M M M M M M M
CWR.............0 0 0 0 0 0 0
TEMP............42 45 47 48 48 47 45
RH..............46 41 40 40 42 45 51
20 FT WIND DIR..SW SW SW SW SW SW SW
20 FT WIND SPD..8 8 8 7 7 6 5
20 FT WIND GUST.17 17 18 17 17 15 13
MIX HGT (KFT)...1.9 2.0 2.2 2.3 2.2 1.7 1.1
TRANSP WIND DIR.SW SW SW SW SW SW SW
TRANSP WIND SPD.24 23 23 23 22 20 17
VRATE KT-FT/1K..40 39 43 45 41 29 16
VENTRATE CAT....PR PR FR FR FR PR PR
MONDAY NIGHT
SKY/WEATHER.........MOSTLY CLEAR (20-30 PERCENT).
CWR.................0 PERCENT.
TEMPERATURE.........MIN 33.
RH..................MAX 85 PERCENT.
WIND (20 FT)........
SLOPE/VALLEY.......LIGHT WINDS BECOMING SOUTHWEST AROUND 5 MPH
EARLY IN THE MORNING.
MIXING HEIGHT.......400 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 14 TO 15 MPH.
SMOKE DISPERSAL.....POOR (4500 KNOT-FT).
TIME (CST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY COVER.......MCR PC PC MCR MCR MCR MCR MCR MCR MCR MCR MCR
WEATHER COV.....M M M M M M M M M M M M
WEATHER TYPE....M M M M M M M M M M M M
TSTM COV........M M M M M M M M M M M M
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............42 41 39 38 37 37 37 36 35 35 34 33
RH..............60 62 64 67 70 70 70 72 75 75 78 85
20 FT WIND DIR..SW SW SW SW SW SW SW SW SW SW SW SW
20 FT WIND SPD..3 3 3 3 3 3 3 3 5 5 5 6
20 FT WIND GUST.12 12 12 12 12 10 10 10 12 13 14 14
MIX HGT (KFT)...0.6 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4
TRANSP WIND DIR.SW SW SW SW SW SW SW SW SW SW SW SW
TRANSP WIND SPD.15 14 14 14 14 14 14 14 14 14 14 14
VRATE KT-FT/1K..7 5 5 5 5 5 5 5 5 5 5 5
VENTRATE CAT....PR PR PR PR PR PR PR PR PR PR PR PR
FORECASTER...COOLEY
REQUESTED BY...JENNY LESKO
TYPE OF REQUEST...PRESCRIBED
.TAG 2528770.0/PAH
.DELDT 01/12/26
.FORMATTERVERSION 2.0.0
.EMAIL JENNIFER.LESKO@ILLINOIS.GOV
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