429
FNUS73 KLSX 111229
FWSLSX
SPOT FORECAST FOR IL CAVERNS RX...IDNR
NATIONAL WEATHER SERVICE SAINT LOUIS MO
629 AM CST WED FEB 11 2026
FORECAST IS BASED ON IGNITION TIME OF 1000 CST ON FEBRUARY 11.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE
NATIONAL WEATHER SERVICE.
DISCUSSION
LIGHT NORTHERLY WINDS WILL CONTINUE TODAY WITH AFTERNOON HIGHS
REACHING THE LOWER 50S UNDER A MOSTLY SUNNY SKY. MINIMUM RELATIVE
HUMIDITY VALUES WILL BE IN THE MID 30S THIS AFTERNOON. SURFACE
WINDS WILL BE CALM AND VARIABLE OVERNIGHT WITH INCREASING CLOUDS
FROM THE NORTH BY TOMORROW MORNING WHEN MORNING LOWS WILL BE RIGHT
AROUND FREEZING. THURSDAY WILL BE MOSTLY CLOUDY WITH TEMPERATURES
IN THE LOW 50S FOR AFTERNOON HIGHS. WITH MORE CLOUDS AND LESS
MIXING ON THURSDAY, MINIMUM RELATIVE HUMIDITY VALUES WILL BE IN
THE LOWER 40S THURSDAY AFTERNOON. SURFACE WINDS BECOME
SOUTHEASTERLY ON THURSDAY, SLOWLY INCREASING IN SPEED BY THE
AFTERNOON.
REST OF TODAY
SKY/WEATHER.........SUNNY (5-15 PERCENT).
CWR.................0 PERCENT.
TEMPERATURE.........39 AT IGNITION...MAX 50.
RH..................62 PERCENT AT IGNITION...MIN 37 PERCENT.
EYE LEVEL WINDS.....WINDS NORTH AT 5 MPH OR LESS AT IGNITION...OTHERWISE
BECOMING LIGHT LATER THIS AFTERNOON.
ADJUSTMENT FACTOR OF 0.3 USED.
WIND (20 FT)........WINDS NORTH AT 5 MPH AT IGNITION...OTHERWISE
NORTH WINDS AROUND 5 MPH IN THE LATE MORNING
BECOMING LIGHT LATER THIS AFTERNOON.
MIXING HEIGHT.......1400 FT AGL AT IGNITION...OTHERWISE MAX 2200 FT
AGL.
TRANSPORT WINDS.....NORTH 7 TO 12 MPH.
SMOKE DISPERSAL.....POOR /2010 M/S-M/ AT IGNITION. MAX...POOR /3470
M/S-M/.
TIME (CST) 10 AM NOON 2 PM 4 PM 6 PM 8 PM
SKY (%).........18 10 4 3 8 4
WEATHER COV.....
WEATHER TYPE....NONE NONE NONE NONE NONE NONE
TSTM COV........
CWR.............0 0 0 0 0 0
TEMP............39 45 48 48 43 39
RH..............62 49 44 42 51 59
20 FT WIND......N 5 N 5 N 5 N 4 N 2 NW 1
20 FT WIND GUST.10 10 9 7 5 3
EYE LEVEL WIND..N 2 N 2 N 2 N 2 N 1 NW 0
EYE LVL WND GST.5 5 4 3 2 1
MIX HGT (KFT)...1.4 1.8 2.1 1.8 0.2 0.1
TRANSPORT WIND..N 10 N 9 N 12 N 12 N 7 N 6
VRATE KT-FT/1K..13 15 21 18 1 0
VENTRATE CAT....POOR POOR POOR POOR POOR POOR
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR (15-25 PERCENT) THEN BECOMING
MOSTLY CLOUDY (60-70 PERCENT).
CWR.................0 PERCENT.
TEMPERATURE.........MIN 31.
RH..................MAX 81 PERCENT.
EYE LEVEL WINDS.....LIGHT AND VARIABLE WINDS.
ADJUSTMENT FACTOR OF 0.3 USED.
WIND (20 FT)........LIGHT AND VARIABLE WINDS.
MIXING HEIGHT.......MIN 100 FT AGL.
TRANSPORT WINDS.....NORTH 5 TO 7 MPH SHIFTING TO THE SOUTHEAST
AROUND 5 MPH EARLY IN THE MORNING.
SMOKE DISPERSAL.....POOR (30 M/S-M).
THURSDAY
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT).
CWR.................10 PERCENT.
TEMPERATURE.........MAX 49.
RH..................MIN 46 PERCENT.
EYE LEVEL WINDS.....LIGHT AND VARIABLE WINDS.
ADJUSTMENT FACTOR OF 0.3 USED.
WIND (20 FT)........LIGHT WINDS BECOMING SOUTHEAST AROUND 5 MPH IN
THE AFTERNOON, THEN BECOMING LIGHT LATE IN THE
AFTERNOON.
MIXING HEIGHT.......MAX 2100 FT AGL.
TRANSPORT WINDS.....SOUTHEAST 6 TO 10 MPH.
SMOKE DISPERSAL.....POOR (80 M/S-M).
FORECASTER...PEINE/ELMORE
REQUESTED BY...BLAKE BAUM
TYPE OF REQUEST...PRESCRIBED
.TAG 2602418.0/LSX
.DELDT 02/11/26
.FORMATTERVERSION 2.0.0
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