826
FNUS73 KLSX 241339
FWSLSX
SPOT FORECAST FOR MATSON HILL...ST. CHARLES COUNTY PARKS
NATIONAL WEATHER SERVICE SAINT LOUIS MO
839 AM CDT TUE MAR 24 2026
FORECAST IS BASED ON IGNITION TIME OF 1100 CDT ON MARCH 24.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE
NATIONAL WEATHER SERVICE.
DISCUSSION
SLIGHTLY WARMER CONDITIONS ARE EXPECTED TODAY ALONG WITH PREDOMINANTLY
DRY CONDITIONS. AT IGNITION, RH WILL BE FALLING AROUND 50 PERCENT, REACHING
AROUND 25 PERCENT THIS AFTERNOON. HOWEVER, SOUTHEASTERLY TO SOUTHERLY WINDS
ARE ANTICIPATED TO BE TOO WEAK FOR ELEVATED FIRE DANGER. MIXING HEIGHTS
WILL ALSO BE RISING ABOVE 1700 FT AGL AROUND 11 AM AS A LOW-LEVEL
TEMPERATURE INVERSION BREAKS HELPING TO IMPROVE SMOKE DISPERSAL TO FAIR
LEVELS. ANOTHER INVERSION WILL QUICKLY DEVELOP AROUND SUNSET WITH RH ALSO
RISING.
REST OF TODAY
SKY/WEATHER.........MOSTLY SUNNY (40-50 PERCENT).
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
TEMPERATURE.........49 AT IGNITION...MAX 64.
RH..................48 PERCENT AT IGNITION...MIN 25 PERCENT.
EYE LEVEL WINDS.....WINDS AROUND 1 MPH USING AND ADJUSTMENT FACTOR OF 0.1
WIND (20 FT)........WINDS SOUTHEAST AT 7 MPH AT
IGNITION...OTHERWISE SOUTHEAST WINDS 5 TO 7
MPH.
MIXING HEIGHT.......1900 FT AGL AT IGNITION...OTHERWISE MAX 3800 FT
AGL.
TRANSPORT WINDS.....SOUTH 9 TO 14 MPH.
SMOKE DISPERSAL.....POOR /3610 M/S-M/ AT IGNITION. MAX...FAIR /5990
M/S-M/.
TIME (CDT) 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM 7PM 8PM 9PM 10P
SKY (%).........44 47 48 39 44 45 53 69 72 74 75 68
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............49 53 58 60 63 64 64 64 60 57 56 53
RH..............48 41 34 32 26 25 27 27 33 37 40 48
20 FT WIND DIR..SE SE SE SE SE SE SE E E E SE SE
20 FT WIND SPD..7 7 6 6 6 6 5 5 5 5 5 6
20 FT WIND GUST.12 11 11 11 11 11 10 10 10 11 11 11
EYE LVL WND DIR.SE SE SE SE SE SE SE E E E SE SE
EYE LVL WND SPD.3 3 3 3 3 3 2 2 2 2 2 3
EYE LVL WND GST.6 5 5 5 5 5 5 5 5 5 5 5
MIX HGT (KFT)...1.9 2.1 2.5 3.1 3.5 3.8 3.8 2.8 0.6 0.6 0.6 0.6
TRANSP WIND DIR.S S S S S S S SE E E SE SE
TRANSP WIND SPD.14 14 13 13 13 12 9 10 9 12 14 14
VRATE KT-FT/1K..23 26 27 34 38 38 30 25 5 6 8 7
VENTRATE CAT....PR PR PR PR PR PR PR PR PR PR PR PR
FORECASTER...BRITT
REQUESTED BY...CHUCK COLLINS
TYPE OF REQUEST...PRESCRIBED
.TAG 2607532.0/LSX
.DELDT 03/24/26
.FORMATTERVERSION 2.0.0
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