875
FNUS73 KLSX 272209
FWSLSX
SPOT FORECAST FOR CLARENCE CANNON UNIT 7...USFWS
NATIONAL WEATHER SERVICE SAINT LOUIS MO
409 PM CST FRI FEB 27 2026
FORECAST IS BASED ON IGNITION TIME OF 1000 CST ON FEBRUARY 28.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE
NATIONAL WEATHER SERVICE.
..RED FLAG WARNING IN EFFECT UNTIL 6 PM CST THIS EVENING
DISCUSSION
THE MIXING HEIGHT IS NOT EXPECTED TO REACH 1700 FEET UNTIL BETWEEN
10 AND 11 AM ON SATURDAY. THE MIXING HEIGHTS WILL NOT BE AS HIGH
ON SATURDAY AS THEY WERE TODAY, SO SMOKE DISPERSAL IS EXPECTED TO
ONLY BE FAIR DURING THE AFTERNOON. THERE IS A SLIGHT CHANCE OF
OF A WETTING RAIN BETWEEN NOON AND 3 PM, BUT THE MINIMUM RELATIVE
HUMIDTY IS STILL EXPECTED TO FALL TO AROUND 30 TO 35 PERCENT
DURING THE AFTERNOON WITH THE 20 FOOT WINDS SHIFTING OUT OF THE
SOUTHWEST AROUND 6 MPH.
WINDS WILL TURN OUT OF THE NORTH ON SATURDAY NIGHT. TEMPERATURES
WILL BE COOLER ON SUNDAY WITH A BETTER CHANCE (80%) FOR RAIN OR SNOW
ON SUNDAY NIGHT.
SATURDAY
SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT). SLIGHT CHANCE OF
RAIN EARLY IN THE AFTERNOON.
CWR.................4 PERCENT.
CHANCE OF THUNDER...3 PERCENT.
TEMPERATURE.........48 AT IGNITION...MAX 64.
RH..................47 PERCENT AT IGNITION...MIN 33 PERCENT.
EYE LEVEL WINDS.....WINDS AROUND 3 MPH WITH AN ADJUSTMENT FACTOR
OF 0.4.
WIND (20 FT)........WINDS SOUTHEAST AT 6 MPH AT
IGNITION...OTHERWISE SOUTHEAST WINDS 6 TO 7 MPH
SHIFTING TO THE SOUTHWEST AROUND 6 MPH LATE IN
THE AFTERNOON.
MIXING HEIGHT.......1600 FT AGL AT IGNITION...OTHERWISE MAX 2400 FT
AGL.
TRANSPORT WINDS.....SOUTH 14 TO 21 MPH SHIFTING TO THE SOUTHWEST
AROUND 13 MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR /3060 M/S-M/ AT IGNITION. MAX...FAIR /7670
M/S-M/.
TIME (CST) 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM 7PM 8PM 9PM
SKY (%).........21 21 33 29 29 28 36 39 27 21 19 16
WEATHER COV..... SCH
WEATHER TYPE.... RN
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............48 52 57 60 62 64 64 63 60 57 52 48
RH..............47 43 35 35 34 33 33 38 47 49 54 56
20 FT WIND DIR..SE SE SE S S S S SW E N N N
20 FT WIND SPD..6 7 6 7 7 8 7 6 5 5 6 7
20 FT WIND GUST.12 14 14 14 14 16 14 12 10 13 15 17
EYE LVL WND DIR.SE SE SE S S S S SW E N N N
EYE LVL WND SPD.3 3 3 3 3 4 3 3 2 2 3 3
EYE LVL WND GST.6 6 6 6 6 7 6 6 5 6 7 8
MIX HGT (KFT)...1.6 1.9 2.2 2.3 2.3 2.4 1.9 1.0 0.5 0.8 1.0 1.1
TRANSP WIND DIR.SE SE S S S S SW SW SW N N N
TRANSP WIND SPD.14 15 16 18 21 23 20 13 12 12 12 13
VRATE KT-FT/1K..20 25 31 37 42 49 32 11 5 8 10 12
VENTRATE CAT....PR PR PR PR FR FR PR PR PR PR PR PR
SATURDAY NIGHT
SKY/WEATHER.........PARTLY CLOUDY (25-35 PERCENT) THEN BECOMING
MOSTLY CLOUDY (50-60 PERCENT).
CWR.................2 PERCENT.
CHANCE OF THUNDER...2 PERCENT.
TEMPERATURE.........MIN 26.
RH..................MAX 78 PERCENT.
EYE LEVEL WINDS.....WINDS AROUND 3 MPH WITH AN ADJUSTMENT FACTOR
OF 0.4.
WIND (20 FT)........NORTH WINDS 5 TO 8 MPH WITH GUSTS TO AROUND 18
MPH.
MIXING HEIGHT.......MIN 500 FT AGL.
TRANSPORT WINDS.....SOUTHWEST AROUND 12 MPH SHIFTING TO THE NORTH
12 TO 21 MPH IN THE EVENING AND OVERNIGHT, THEN
INCREASING TO 20 TO 22 MPH OVERNIGHT.
SMOKE DISPERSAL.....POOR (830 M/S-M).
SUNDAY
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT). SLIGHT CHANCE OF
RAIN IN THE AFTERNOON. SLIGHT CHANCE OF SNOW
LATE IN THE AFTERNOON.
CWR.................6 PERCENT.
CHANCE OF THUNDER...1 PERCENT.
TEMPERATURE.........MAX 44.
RH..................MIN 43 PERCENT.
EYE LEVEL WINDS.....WINDS AROUND 3 MPH WITH AN ADJUSTMENT FACTOR
OF 0.4.
WIND (20 FT)........NORTHEAST WINDS 5 TO 7 MPH.
MIXING HEIGHT.......MAX 2500 FT AGL.
TRANSPORT WINDS.....NORTHEAST 15 TO 18 MPH.
SMOKE DISPERSAL.....POOR (3500 M/S-M) EARLY IN THE MORNING
INCREASING TO MARGINAL MAX (5480 M/S-M) IN THE
AFTERNOON.
FORECASTER...BRITT
REQUESTED BY...CHRIS WOODSON
TYPE OF REQUEST...PRESCRIBED
.TAG 2604265.0/LSX
.DELDT 02/27/26
.FORMATTERVERSION 2.0.0
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