789
FNUS73 KLSX 081122
FWSLSX
SPOT FORECAST FOR CANTON DMMP PRESCRIBED FIRE...USACE
NATIONAL WEATHER SERVICE SAINT LOUIS MO
622 AM CDT WED APR 8 2026
FORECAST IS BASED ON IGNITION TIME OF 0900 CDT ON APRIL 08.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE
NATIONAL WEATHER SERVICE.
DISCUSSION
TODAY WILL BE THE FIRST DAY OF RETURNING ABOVE AVERAGE TEMPERATURES
ACROSS THE AREA ALONG WITH PASSING UPPER-LEVEL CLOUDS. AT IGNITION
TIME, RH WILL BE AROUND 60 PERCENT. ALTHOUGH SOUTHERLY WINDS WILL
ALREADY BE AROUND 12 MPH, MIXING HEIGHTS OF AROUND 1000 FT
AGL WILL INITIALLY FAVOR POOR SMOKE DISPERSAL. HOWEVER, CONDITIONS
WILL QUICKLY IMPROVE THROUGH 12 PM WITH RH FALLING BELOW 50 PERCENT
AND SOUTHERLY WINDS OF 12 TO 16 MPH (GUSTING 30 TO 35 MPH) WITH MIXING
HEIGHTS RISING ABOVE 3000 FT AGL. SMOKE DISPERSAL WILL BECOME POOR
AGAIN AND RH WILL RISE AROUND 7 PM (SUNSET) AS A TEMPERATURE
INVERSION DEVELOPS.
REST OF TODAY
SKY/WEATHER.........SUNNY (15-25 PERCENT) THEN BECOMING MOSTLY
SUNNY (30-40 PERCENT).
CWR.................0 PERCENT.
CHANCE OF THUNDER...1 PERCENT.
TEMPERATURE.........42 AT IGNITION...MAX 75.
RH..................82 PERCENT AT IGNITION...MIN 37 PERCENT.
WIND (20 FT)........WINDS SOUTH AT 12 MPH BECOMING 12 TO 16 MPH WITH
GUSTS OF 30 TO 35 MPH IN THE AFTERNOON.
MIXING HEIGHT.......700 FT AGL AT IGNITION...OTHERWISE MAX 6700 FT
AGL.
TRANSPORT WINDS.....SOUTH 18 TO 25 MPH INCREASING TO SOUTHWEST 28
TO 36 MPH LATE IN THE MORNING.
SMOKE DISPERSAL.....POOR /1650 M/S-M/ AT IGNITION. MAX...GOOD
/11910 M/S-M/ INCREASING TO EXCELLENT (24920
M/S-M) IN THE AFTERNOON.
TIME (CDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM
SKY (%).........0 19 38 57 45 50 34 24 23 11 14 36
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 10
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............42 45 49 55 60 64 68 72 73 73 75 73
RH..............82 79 74 64 58 52 49 43 41 41 37 40
20 FT WIND DIR..S S S S S S S S S S S S
20 FT WIND SPD..10 11 12 13 14 15 16 16 16 15 14 12
20 FT WIND GUST.19 21 23 25 27 28 29 29 29 29 26 23
MIX HGT (KFT)...0.7 0.8 1.4 1.6 2.2 3.0 5.1 6.0 6.4 6.7 6.4 3.5
TRANSP WIND DIR.S S S S S S SW SW SW SW SW SW
TRANSP WIND SPD.18 18 25 25 28 30 36 36 36 36 35 29
VRATE KT-FT/1K..11 13 30 35 52 76 159 181 193 203 192 97
VENTRATE CAT....PR PR PR PR FR GD EXL EXL EXL EXL EXL GD
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT) THEN BECOMING
MOSTLY CLOUDY (60-70 PERCENT) THEN BECOMING
PARTLY CLOUDY (40-50 PERCENT). ISOLATED
THUNDERSTORMS IN THE EVENING. SCATTERED RAIN
SHOWERS THROUGH THE NIGHT.
CWR.................7 PERCENT.
CHANCE OF THUNDER...16 PERCENT.
TEMPERATURE.........MIN 54.
RH..................MAX 77 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 6 TO 12 MPH WITH GUSTS TO
AROUND 23 MPH DECREASING TO AROUND 5 MPH AFTER
3 AM. GUSTY AND ERRATIC WINDS EXPECTED NEAR
THUNDERSTORMS LATE IN THE EVENING.
MIXING HEIGHT.......MIN 500 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 20 TO 29 MPH DECREASING TO 9 TO 12
MPH.
SMOKE DISPERSAL.....EXCELLENT (15270 M/S-M) EARLY IN THE EVENING
DECREASING TO POOR MIN (570 M/S-M) LATE IN THE
NIGHT.
FORECASTER...PFAHLER
REQUESTED BY...TS
TYPE OF REQUEST...PRESCRIBED
.TAG 2609521.0/LSX
.DELDT 04/08/26
.FORMATTERVERSION 2.0.0
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