555
FNUS73 KLSX 280859
FWSLSX
SPOT FORECAST FOR RIVER ROUND UNIT 2...MISSOURI DEPARTMENT OF CONSERVATION
NATIONAL WEATHER SERVICE SAINT LOUIS MO
359 AM CDT WED OCT 28 2026
FORECAST IS BASED ON IGNITION TIME OF 1100 CDT ON OCTOBER 28.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE
NATIONAL WEATHER SERVICE.
DISCUSSION
WARMER TEMPERATURES ARE FORECAST TODAY AND THURSDAY AHEAD OF A
COLD FRONT. LIGHT SOUTHERLY WINDS ARE EXPECTED AHEAD OF THIS
FRONT, WITH WINDS BECOMING LIGHT/VARIABLE AS THE BOUNDARY STALLS
OUT. RELATIVE HUMIDITY VALUES TODAY ARE EXPECTED TO DROP INTO THE
40-45 PERCENT RANGE, WITH MINIMUM VALUES CLOSER TO 50-55 PERCENT
THURSDAY.
REST OF TODAY
SKY/WEATHER.........SUNNY (0-10 PERCENT).
CWR.................0 PERCENT.
CHANCE OF THUNDER...1 PERCENT.
TEMPERATURE.........70 AT IGNITION...MAX 79.
RH..................63 PERCENT AT IGNITION...MIN 44 PERCENT.
EYE LEVEL WINDS.....WINDS SOUTH AROUND 2 MPH USING AN ADJUSTMENT
FACTOR OF 0.3.
WIND (20 FT)........WINDS SOUTH AT 3 MPH AT IGNITION...OTHERWISE
LIGHT WINDS BECOMING SOUTH AROUND 5 MPH LATE IN
THE AFTERNOON, THEN BECOMING LIGHT LATE IN THE
AFTERNOON.
MIXING HEIGHT.......1700 FT AGL AT IGNITION...OTHERWISE MAX 4900 FT
AGL.
TRANSPORT WINDS.....SOUTH 9 TO 14 MPH.
SMOKE DISPERSAL.....POOR /2120 M/S-M/ AT IGNITION. MAX...GOOD /9320
M/S-M/.
TIME (CDT) 11 AM 1 PM 3 PM 5 PM 7 PM 9 PM
SKY (%).........5 5 5 0 3 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............70 77 79 77 66 61
RH..............63 48 44 47 68 78
20 FT WIND......S 3 S 4 S 5 S 4 S 3 S 3
20 FT WIND GUST.9 11 11 10 10 10
EYE LEVEL WIND..S 1 S 2 S 2 S 2 S 1 S 1
EYE LVL WND GST.4 5 5 5 5 5
MIX HGT (KFT)...1.7 4.8 4.9 2.0 0.4 0.4
TRANSPORT WIND..S 9 S 12 S 14 S 12 S 10 S 12
VRATE KT-FT/1K..14 48 59 20 4 4
VENTRATE CAT....POOR FAIR FAIR POOR POOR POOR
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR (0-10 PERCENT).
CWR.................0 PERCENT.
CHANCE OF THUNDER...1 PERCENT.
TEMPERATURE.........MIN 52.
RH..................MAX 87 PERCENT.
EYE LEVEL WINDS.....LIGHT/VARIABLE USING AN ADJUSTMENT FACOT OF 0.3.
WIND (20 FT)........LIGHT WINDS.
MIXING HEIGHT.......MIN 400 FT AGL.
TRANSPORT WINDS.....SOUTH 10 TO 12 MPH.
SMOKE DISPERSAL.....POOR (600 M/S-M).
THURSDAY
SKY/WEATHER.........SUNNY (5-15 PERCENT).
CWR.................2 PERCENT.
CHANCE OF THUNDER...6 PERCENT.
TEMPERATURE.........MAX 82.
RH..................MIN 53 PERCENT.
EYE LEVEL WINDS.....LIGHT/VARIABLE USING AN ADJUSTMENT FACOT OF 0.3.
WIND (20 FT)........LIGHT WINDS.
MIXING HEIGHT.......MAX 5200 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 9 TO 12 MPH SHIFTING TO THE WEST
AROUND 6 MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (600 M/S-M) EARLY IN THE MORNING
INCREASING TO FAIR MAX (6540 M/S-M) IN THE
AFTERNOON.
FORECASTER...GOSSELIN
REQUESTED BY...ELIZABETH THOMPSON
TYPE OF REQUEST...PRESCRIBED
.TAG 2624704.0/LSX
.DELDT 10/28/26
.FORMATTERVERSION 2.0.0
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