748
FNUS73 KLSX 201141
FWSLSX
SPOT FORECAST FOR BUTTER NOODLE GLADES UNIT...MISSOURI DEPARTMENT OF CONSERVATION
NATIONAL WEATHER SERVICE SAINT LOUIS MO
541 AM CST TUE JAN 20 2026
FORECAST IS BASED ON IGNITION TIME OF 1100 CST ON JANUARY 20.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE
NATIONAL WEATHER SERVICE.
DISCUSSION
HIGH TEMPERATURES WILL BE CLOSE TO NORMAL TODAY WITH MINIMUM RELATIVE
HUMIDITY VALUES AROUND 30 PERCENT. MIXING HEIGHTS WILL CLIMB THIS AFTERNOON
TO AROUND 2800 FEET RESULTING IN GOOD SMOKE DISPERSAL. WINDS WILL BE OUT OF
THE SOUTHWEST DURING THE DAY TODAY, BUT WILL REMAIN UNDER 7 MPH.
DRY WEATHER IS EXPECTED THROUGH WEDNESDAY WITH TEMPERATURES STAYING NEAR OR
JUST ABOVE NORMAL. A COLD FRONT WILL MOVE THROUGH THE SITE ON WEDNESDAY
MORNING CAUSING WINDS TO SHIFT OUT OF THE SOUTHWEST. MIXING HEIGHTS ARE
EXPECTED TO CLIMB BACK TO AROUND TO 2900 FEET WITH GOOD SMOKE DISPERSION IN
THE AFTERNOON WITH MINIMUM RELATIVE HUMIDITY VALUES BETWEEN 40 AND 45 PERCENT.
REST OF TODAY
SKY/WEATHER.........SUNNY (10-20 PERCENT).
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
TEMPERATURE.........27 AT IGNITION...MAX 40.
RH..................40 PERCENT AT IGNITION...MIN 31 PERCENT.
EYE LEVEL WINDS.....WINDS AROUND 2 MPH WITH AN ADJUSTMENT FACTOR OF 0.3.
WIND (20 FT)........WINDS SOUTH AT 6 MPH AT IGNITION...OTHERWISE
SOUTHWEST WINDS 6 TO 7 MPH.
MIXING HEIGHT.......1900 FT AGL AT IGNITION...OTHERWISE MAX 2800 FT
AGL.
TRANSPORT WINDS.....SOUTHWEST 15 TO 22 MPH.
SMOKE DISPERSAL.....MARGINAL /4890 M/S-M/ AT IGNITION. MAX...GOOD
/8230 M/S-M/.
TIME (CST) 11 AM 1 PM 3 PM 5 PM 7 PM 9 PM
SKY (%).........27 10 6 8 13 19
WEATHER COV.....
WEATHER TYPE....NONE NONE NONE NONE NONE NONE
TSTM COV........
CWR.............0 0 0 0 0 0
CHC OF THDR (%).0 0 0 0 0 0
TEMP............27 36 39 38 34 31
RH..............40 32 34 34 38 41
20 FT WIND......S 6 SW 7 S 7 S 6 S 7 S 9
20 FT WIND GUST.14 15 16 16 18 21
EYE LEVEL WIND..S 3 SW 3 S 3 S 3 S 3 S 4
EYE LVL WND GST.6 7 7 7 8 10
MIX HGT (KFT)...1.9 2.5 2.8 0.7 0.7 0.8
TRANSPORT WIND..S 18 SW 21 SW 22 S 15 S 17 S 22
VRATE KT-FT/1K..31 46 52 9 10 15
VENTRATE CAT....POOR FAIR FAIR POOR POOR POOR
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (25-35 PERCENT) THEN BECOMING
MOSTLY CLOUDY (70-80 PERCENT).
CWR.................10 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
TEMPERATURE.........MIN 29.
RH..................MAX 82 PERCENT.
EYE LEVEL WINDS.....WINDS AROUND 3 MPH WITH AN ADJUSTMENT FACTOR OF 0.3.
WIND (20 FT)........SOUTH WINDS 7 TO 10 MPH WITH GUSTS TO AROUND 22
MPH SHIFTING TO THE SOUTHWEST AROUND 8 MPH WITH
GUSTS TO AROUND 20 MPH EARLY IN THE MORNING.
MIXING HEIGHT.......MIN 600 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 16 TO 22 MPH.
SMOKE DISPERSAL.....POOR (1270 M/S-M).
WEDNESDAY
SKY/WEATHER.........PARTLY SUNNY (45-55 PERCENT) THEN BECOMING
SUNNY (10-20 PERCENT).
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
TEMPERATURE.........MAX 45.
RH..................MIN 43 PERCENT.
EYE LEVEL WINDS.....WINDS AROUND 2 MPH WITH AN ADJUSTMENT FACTOR OF 0.3.
WIND (20 FT)........WEST WINDS 5 TO 6 MPH WITH GUSTS TO AROUND 19
MPH IN THE MORNING AND EARLY AFTERNOON BECOMING
LIGHT.
MIXING HEIGHT.......MAX 2900 FT AGL.
TRANSPORT WINDS.....WEST 17 TO 24 MPH DECREASING TO AROUND 14 MPH
LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (2470 M/S-M) EARLY IN THE MORNING
INCREASING TO GOOD MAX (8640 M/S-M) IN THE
AFTERNOON.
FORECASTER...BRITT
REQUESTED BY...DAVID SHIEH
TYPE OF REQUEST...PRESCRIBED
.TAG 2600573.0/LSX
.DELDT 01/20/26
.FORMATTERVERSION 2.0.0
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