038
FNUS73 KLSX 221010
FWSLSX
SPOT FORECAST FOR ANDERSON EAST BURN UNIT...MISSOURI DEPARTMENT OF CONSERVATION
NATIONAL WEATHER SERVICE SAINT LOUIS MO
510 AM CDT WED OCT 22 2025
FORECAST IS BASED ON IGNITION TIME OF 1100 CDT ON OCTOBER 22.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE
NATIONAL WEATHER SERVICE.
DISCUSSION
WEST/NORTHWEST WINDS WILL BE QUITE A BIT LIGHTER TODAY COMPARED
TO YESTERDAY. SHALLOWER MIXING IS ALSO EXPECTED THIS AFTERNOON,
TOPPING OUT AROUND 4000 FEET AGL. THE MIXING HEIGHT WILL INCREASE
DRAMATICALLY BETWEEN 0900 AND 1100 AM THIS MORNING. VENTILATION RATES
TODAY WILL BE NOT AS GOOD AS YESTERDAY, MOSTLY IN THE FAIR CATEGORY
DUE TO THE AFOREMENTIONED LIGHTER WINDS AND SHALLOWER MIXING.
RELATIVE HUMIDITY VALUES WILL REMAIN LOW ON THURSDAY (30-35%), BUT
WINDS WILL BE LIGHT/VARIABLE. BECAUSE OF THE LIGHTER WINDS, VENTILATION
RATES THURSDAY SHOULD BE POOR. LOW-LEVEL MOISTURE BEGINS TO INCREASE
THURSDAY NIGHT, RESULTING IN HIGHER RELATIVE HUMIDITY VALUES. CHANCES OF
LIGHT RAIN ALSO INCREASE LATE FRIDAY (40-50%) INTO THE WEEKEND.
REST OF TODAY
SKY/WEATHER.........SUNNY (0-10 PERCENT).
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
TEMPERATURE.........55 AT IGNITION...MAX 65.
RH..................45 PERCENT AT IGNITION...MIN 33 PERCENT.
EYE LEVEL WINDS.....WINDS WEST AROUND 2 TO 3 MPH USING AN ADJUSTMENT
FACTOR OF 0.3.
WIND (20 FT)........WINDS WEST AT 7 MPH AT IGNITION...OTHERWISE
WEST WINDS 5 TO 8 MPH.
MIXING HEIGHT.......2300 FT AGL AT IGNITION...OTHERWISE MAX 3800 FT
AGL.
TRANSPORT WINDS.....WEST 9 TO 18 MPH.
SMOKE DISPERSAL.....MARGINAL /5140 M/S-M/ AT IGNITION. MAX...FAIR
/7670 M/S-M/.
TIME (CDT) 11 AM 1 PM 3 PM 5 PM 7 PM 9 PM
SKY (%).........1 1 6 6 1 2
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............55 61 65 64 56 51
RH..............45 36 33 35 47 59
20 FT WIND......W 7 W 8 W 7 W 5 W 3 SW 2
20 FT WIND GUST.16 16 15 11 6 5
EYE LEVEL WIND..W 3 W 4 W 3 W 2 W 1 SW 1
EYE LVL WND GST.7 7 7 5 3 2
MIX HGT (KFT)...2.3 3.4 3.8 2.0 0.3 0.4
TRANSPORT WIND..W 17 W 17 W 15 W 9 W 5 W 2
VRATE KT-FT/1K..33 49 47 14 1 1
VENTRATE CAT....POOR FAIR FAIR POOR POOR POOR
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR (0-10 PERCENT).
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
TEMPERATURE.........MIN 41.
RH..................MAX 76 PERCENT.
EYE LEVEL WINDS.....LIGHT AND VARIABLE.
WIND (20 FT)........LIGHT WINDS.
MIXING HEIGHT.......MIN 300 FT AGL.
TRANSPORT WINDS.....WEST 2 TO 5 MPH SHIFTING TO THE NORTH 5 TO 6
MPH OVERNIGHT.
SMOKE DISPERSAL.....POOR (90 M/S-M).
THURSDAY
SKY/WEATHER.........SUNNY (0-10 PERCENT).
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
TEMPERATURE.........MAX 66.
RH..................MIN 34 PERCENT.
EYE LEVEL WINDS.....LIGHT AND VARIABLE.
WIND (20 FT)........LIGHT WINDS.
MIXING HEIGHT.......MAX 4200 FT AGL.
TRANSPORT WINDS.....NORTH 3 TO 5 MPH SHIFTING TO THE NORTHWEST 6 TO
7 MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (130 M/S-M).
FORECASTER...GOSSELIN
REQUESTED BY...DAVID SHIEH
TYPE OF REQUEST...PRESCRIBED
.TAG 2524174.0/LSX
.DELDT 10/22/25
.FORMATTERVERSION 2.0.0
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