459
FNUS73 KLSX 211147
FWSLSX
SPOT FORECAST FOR BLUEBELL SCHOOL...DNR
NATIONAL WEATHER SERVICE SAINT LOUIS MO
547 AM CST WED JAN 21 2026
FORECAST IS BASED ON IGNITION TIME OF 1100 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 3200 FEET THIS AFTERNOON WITH GOOD SMOKE DISPERSAL.
WINDS WILL BE LIGHTER ON THURSDAY LEADING TO POOR SMOKE DISPERAL.
MINIMUM RELATIVE HUMIDITY VALUES WILL BE AROUND 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 (5-15 PERCENT).
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
TEMPERATURE.........44 AT IGNITION...MAX 47.
RH..................60 PERCENT AT IGNITION...MIN 42 PERCENT.
EYE LEVEL WINDS.....WINDS AROUND 3 MPH WITH AN ADJUSTMENT FACTOR OF 0.3
WIND (20 FT)........WINDS WEST AT 8 MPH AT IGNITION...OTHERWISE
WEST WINDS 7 TO 9 MPH WITH GUSTS TO AROUND 19
MPH.
MIXING HEIGHT.......2700 FT AGL AT IGNITION...OTHERWISE MAX 3200 FT
AGL.
TRANSPORT WINDS.....WEST 12 TO 21 MPH.
SMOKE DISPERSAL.....FAIR /7570 M/S-M/ AT IGNITION. MAX...GOOD /9050
M/S-M/.
TIME (CST) 11 AM 1 PM 3 PM 5 PM 7 PM 9 PM
SKY (%).........19 4 6 4 4 7
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 47 47 44 37 34
RH..............60 47 42 43 54 56
20 FT WIND......W 8 W 9 W 9 W 7 W 6 W 7
20 FT WIND GUST.17 19 19 17 16 17
EYE LEVEL WIND..W 4 W 4 W 4 W 3 W 3 W 3
EYE LVL WND GST.8 9 9 8 7 8
MIX HGT (KFT)...2.7 2.9 3.2 0.5 0.4 0.6
TRANSPORT WIND..W 21 W 18 W 20 W 12 W 13 W 16
VRATE KT-FT/1K..48 47 55 5 5 9
VENTRATE CAT....FAIR FAIR FAIR POOR POOR POOR
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR (10-20 PERCENT).
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
TEMPERATURE.........MIN 21.
RH..................MAX 74 PERCENT.
EYE LEVEL WINDS.....WINDS AROUND 3 MPH WITH AN ADJUSTMENT FACTOR OF 0.3
WIND (20 FT)........WEST WINDS AROUND 6 MPH EARLY IN THE EVENING
BECOMING 6 TO 7 MPH WITH GUSTS TO AROUND 17
MPH, THEN SHIFTING TO THE NORTHWEST 5 TO 8 MPH
WITH GUSTS TO AROUND 17 MPH LATE IN THE EVENING
BECOMING LIGHT.
MIXING HEIGHT.......MIN 400 FT AGL.
TRANSPORT WINDS.....WEST 12 TO 18 MPH SHIFTING TO THE NORTH 9 TO 17
MPH OVERNIGHT.
SMOKE DISPERSAL.....POOR (580 M/S-M).
THURSDAY
SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT).
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
TEMPERATURE.........MAX 40.
RH..................MIN 31 PERCENT.
EYE LEVEL WINDS.....LIGHT WINDS
WIND (20 FT)........LIGHT WINDS
MIXING HEIGHT.......MAX 2900 FT AGL.
TRANSPORT WINDS.....NORTH 3 TO 9 MPH.
SMOKE DISPERSAL.....POOR (520 M/S-M).
FORECASTER...BRITT
REQUESTED BY...RON COLATSKIE
TYPE OF REQUEST...PRESCRIBED
.TAG 2600727.0/LSX
.DELDT 01/21/26
.FORMATTERVERSION 2.0.0
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