072
FNUS73 KLSX 241034
FWSLSX
SPOT FORECAST FOR HORSESHOE LAKE MADISON...ILLINOIS DNR
NATIONAL WEATHER SERVICE SAINT LOUIS MO
534 AM CDT TUE MAR 24 2026
FORECAST IS BASED ON IGNITION TIME OF 1000 CDT ON MARCH 24.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE
NATIONAL WEATHER SERVICE.
DISCUSSION
SLIGHTLY WARMER CONDITIONS ARE EXPECTED TODAY ALONG WITH
PREDOMINANTLY DRY CONDITIONS. AT IGNITION, RH WILL BE FALLING BELOW
60 PERCENT, REACHING 25 TO 30 PERCENT THIS AFTERNOON. HOWEVER,
SOUTHEASTERLY TO SOUTHERLY WINDS ARE ANTICIPATED TO BE TOO WEAK FOR
ELEVATED FIRE DANGER. MIXING HEIGHTS WILL ALSO BE RISING ABOVE 1500
FT AGL AROUND IGNITION TIME AS A LOW-LEVEL TEMPERATURE INVERSION
BREAKS HELPING TO IMPROVE SMOKE DISPERSAL ONLY TO FAIR LEVELS GIVEN
LIGHT WINDS. ANOTHER INVERSION WILL QUICKLY DEVELOP AROUND SUNSET
WITH RH ALSO RISING.
REST OF TODAY
SKY/WEATHER.........MOSTLY SUNNY (45-55 PERCENT).
CWR.................0 PERCENT.
TEMPERATURE.........45 AT IGNITION...MAX 62.
RH..................53 PERCENT AT IGNITION...MIN 30 PERCENT.
EYE LEVEL WINDS.....WINDS SOUTHEAST 6 TO 8 MPH. AN ADJUSTMENT FACTOR
OF 0.2 IS USED.
WIND (20 FT)........WINDS SOUTHEAST 6 TO 8 MPH.
MIXING HEIGHT.......1800 FT AGL AT IGNITION...OTHERWISE MAX 3000 FT
AGL.
TRANSPORT WINDS.....SOUTH 10 TO 14 MPH.
SMOKE DISPERSAL.....POOR /3320 M/S-M/ AT IGNITION. MAX...MARGINAL
/4670 M/S-M/.
TIME (CDT) 10 AM NOON 2 PM 4 PM 6 PM 8 PM
SKY (%).........48 45 46 42 71 79
WEATHER COV.....
WEATHER TYPE....NONE NONE NONE NONE NONE NONE
TSTM COV........
CWR.............0 0 0 0 0 0
TEMP............45 53 59 61 61 55
RH..............53 41 33 30 32 43
20 FT WIND......SE 8 SE 8 SE 7 SE 7 E 6 E 6
20 FT WIND GUST.10 11 10 10 9 9
EYE LEVEL WIND..SE 4 SE 4 SE 3 SE 3 E 3 E 3
EYE LVL WND GST.5 5 5 5 4 4
MIX HGT (KFT)...1.8 2.0 2.6 3.0 2.2 0.6
TRANSPORT WIND..S 14 S 13 S 12 S 12 SE 9 E 10
VRATE KT-FT/1K..21 22 26 30 17 5
VENTRATE CAT....POOR POOR POOR POOR POOR POOR
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (60-70 PERCENT).
CWR.................1 PERCENT.
TEMPERATURE.........MIN 45.
RH..................MAX 68 PERCENT.
EYE LEVEL WINDS.....EAST WINDS 1 MPH EARLY IN THE EVENING SHIFTING
TO THE SOUTHEAST, THEN BECOMING LIGHT. AN
ADJUSTMENT FACTOR OF 0.2 IS USED.
WIND (20 FT)........EAST WINDS 5 TO 7 MPH EARLY IN THE EVENING
SHIFTING TO THE SOUTHEAST, THEN BECOMING
LIGHT.
MIXING HEIGHT.......MIN 400 FT AGL.
TRANSPORT WINDS.....SOUTHEAST 8 TO 17 MPH.
SMOKE DISPERSAL.....POOR (490 M/S-M).
WEDNESDAY
SKY/WEATHER.........PARTLY SUNNY (45-55 PERCENT) THEN BECOMING
MOSTLY SUNNY (25-35 PERCENT).
CWR.................1 PERCENT.
TEMPERATURE.........MAX 78.
RH..................MIN 40 PERCENT.
EYE LEVEL WINDS.....SOUTH WINDS 1 TO 2 MPH. AN ADJUSTMENT FACTOR OF
0.2 IS USED.
WIND (20 FT)........SOUTH WINDS 5 TO 11 MPH.
MIXING HEIGHT.......MAX 4100 FT AGL.
TRANSPORT WINDS.....SOUTH 9 TO 18 MPH SHIFTING TO THE SOUTHWEST
AROUND 20 MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (570 M/S-M) EARLY IN THE MORNING
INCREASING TO GOOD MAX (11080 M/S-M) IN THE
AFTERNOON.
FORECASTER...PFAHLER
REQUESTED BY...EMMA LAUNER
TYPE OF REQUEST...PRESCRIBED
.TAG 2607444.0/LSX
.DELDT 03/24/26
.FORMATTERVERSION 2.0.0
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