258
FNUS73 KLSX 211137
FWSLSX
SPOT FORECAST FOR CONFLUENCE PRAIRIES...MISSOURI STATE PARKS
NATIONAL WEATHER SERVICE SAINT LOUIS MO
537 AM CST WED JAN 21 2026
FORECAST IS BASED ON IGNITION TIME OF 1200 CST ON JANUARY 21.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE
NATIONAL WEATHER SERVICE.
DISCUSSION
WINDS BE OUT OF THE WEST TODAY BEHIND A COLD FRONT THAT WILL MOVE
ACROSS THE BURN SITE THIS MORNING, AND THEN TURN OUT OF THE NORTHWEST
THIS EVENING BEHIND A SECOND COLD FRONT. MIXING HEIGHTS WILL CLIMB
TO AROUND 3500 FEET THIS AFTERNOON WITH GOOD SMOKE DISPERSAL.
WINDS WILL BE LIGHTER ON THURSDAY LEADING TO POOR SMOKE DISPERAL.
MINIMUM RELATIVE HUMIDITY VALUES WILL BE BETWEEN 35 AND 40
PERCENT WITH LOWER VALUES NEAR 30 PERCENT ON THURSDAY.
DRY WEATHER IS EXPECTED THROUGH FRIDAY BEFORE THERE IS A CHANCE
OF SNOW OVER THE WEEKEND.
REST OF TODAY
SKY/WEATHER.........SUNNY (0-10 PERCENT).
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
TEMPERATURE.........44 AT IGNITION...MAX 46.
RH..................45 PERCENT AT IGNITION...MIN 38 PERCENT.
EYE LEVEL WINDS.....WINDS AROUND 5 MPH WITH AN ADJUSTMENT FACTOR OF 0.3
WIND (20 FT)........WINDS WEST AT 14 MPH AT IGNITION...OTHERWISE
WEST WINDS 11 TO 15 MPH WITH GUSTS TO AROUND 25
MPH.
MIXING HEIGHT.......3100 FT AGL AT IGNITION...OTHERWISE MAX 3600 FT
AGL.
TRANSPORT WINDS.....WEST 15 TO 22 MPH.
SMOKE DISPERSAL.....GOOD /8200 M/S-M/ AT IGNITION. MAX...GOOD
/10650 M/S-M/.
TIME (CST) NOON 2 PM 4 PM 6 PM 8 PM 10 PM
SKY (%).........7 7 4 5 14 28
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............44 45 44 40 35 34
RH..............45 41 38 44 56 56
20 FT WIND......W 14 W 15 W 13 W 10 W 10 NW 11
20 FT WIND GUST.24 25 23 20 20 21
EYE LEVEL WIND..W 6 W 7 W 6 W 5 W 5 NW 5
EYE LVL WND GST.11 12 10 9 9 10
MIX HGT (KFT)...3.1 3.6 2.2 0.6 0.8 1.3
TRANSPORT WIND..W 20 W 21 W 18 W 15 W 17 NW 22
VRATE KT-FT/1K..52 66 35 7 11 24
VENTRATE CAT....FAIR GOOD POOR POOR POOR POOR
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR (20-30 PERCENT).
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
TEMPERATURE.........MIN 23.
RH..................MAX 68 PERCENT.
EYE LEVEL WINDS.....WINDS AROUND 4 MPH WITH AN ADJUSTMENT FACTOR OF 0.3
WIND (20 FT)........NORTHWEST WINDS 5 TO 11 MPH WITH GUSTS TO
AROUND 21 MPH.
MIXING HEIGHT.......MIN 600 FT AGL.
TRANSPORT WINDS.....WEST 15 TO 22 MPH SHIFTING TO THE NORTHWEST 9
TO 10 MPH.
SMOKE DISPERSAL.....POOR (1130 M/S-M).
THURSDAY
SKY/WEATHER.........PARTLY SUNNY (45-55 PERCENT).
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
TEMPERATURE.........MAX 38.
RH..................MIN 31 PERCENT.
EYE LEVEL WINDS.....WINDS AROUND 2 MPH WITH AN ADJUSTMENT FACTOR OF 0.3
WIND (20 FT)........LIGHT WINDS BECOMING WEST AROUND 5 MPH EARLY IN
THE AFTERNOON, THEN BECOMING LIGHT LATE IN THE
AFTERNOON.
MIXING HEIGHT.......MAX 3000 FT AGL.
TRANSPORT WINDS.....NORTHWEST 5 TO 8 MPH.
SMOKE DISPERSAL.....POOR (790 M/S-M).
FORECASTER...BRITT
REQUESTED BY...RON COLATSKIE
TYPE OF REQUEST...PRESCRIBED
.TAG 2600728.0/LSX
.DELDT 01/21/26
.FORMATTERVERSION 2.0.0
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