077
FNUS73 KLSX 211607
FWSLSX
SPOT FORECAST FOR SHERMAN TRACT UNIT 1...MISSOURI DEPT. CONSERVATION
NATIONAL WEATHER SERVICE SAINT LOUIS MO
1007 AM CST WED JAN 21 2026
FORECAST IS BASED ON IGNITION TIME OF 1100 CST ON JANUARY 21.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE
NATIONAL WEATHER SERVICE.
DISCUSSION
A COLD FRONT MOVING THROUGH THE REGION THIS MORNING HAS WINDS
CURRENTLY OUT OF THE WEST, THOUGH THEY WILL GRADUALLY BECOME
SOUTHWESTERLY THROUGH THE AFTERNOON. THIS WILL BE AHEAD OF YET
ANOTHER COLD FRONT THIS EVENING AND TONIGHT THAT WILL CAUSE WINDS
TO SHIFT OUT OF THE NORTHWEST AND STRENGTHEN AROUND 9PM. SKIES
WILL REMAIN MOSTLY CLEAR THROUGH THE DAY TODAY, THOUGH THERE WILL
BE A BRIEF HIT OF HIGH CLOUDS WITH THE FRONTAL PASSAGE THIS
EVENING BEFORE SKIES BECOME PARTLY CLOUD OVERNIGHT. CLOUD COVER
INCREASES TOMORROW AHEAD OF THE NEXT WEATHER SYSTEM, WITH
TEMPERATURES EXPECTED TO BE A LITTLE COOLER TOMORROW COMPARED TO
TODAY. WHAT REMAINING LOW-LEVEL MOISTURE THAT IS IN THE AREA WILL
POOL AHEAD OF THE FRONT TODAY, KEEPING RH FROM GETTING TOO LOW.
VALUES ROUGHLY 40-45% ARE EXPECTED THIS AFTERNOON, INCREASING TO
AROUND 65% TONIGHT THANKS TO GUSTY WINDS KEEPING THE AIR MIXING.
RH WILL DROP TOMORROW BEHIND THE SECOND COLD FRONT, WITH VALUES IN
THE AFTERNOON BETWEEN 30-35%. NO PRECIPITATION IS EXPECTED OVER
THE SITE THROUGH THE REQUESTED PERIOD.
REST OF TODAY
SKY/WEATHER.........SUNNY (0-10 PERCENT).
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
TEMPERATURE.........40 AT IGNITION...MAX 43.
RH..................48 PERCENT AT IGNITION...MIN 39 PERCENT.
EYE LEVEL WINDS.....WINDS WEST AT 5 MPH OR LESS. ADJUSTMENT FACTOR
OF 0.2 USED.
WIND (20 FT)........WINDS WEST AT 10 MPH AT IGNITION...OTHERWISE
WEST WINDS 7 TO 11 MPH WITH GUSTS TO AROUND 21
MPH.
MIXING HEIGHT.......2800 FT AGL AT IGNITION...OTHERWISE MAX 3600 FT
AGL.
TRANSPORT WINDS.....WEST 16 TO 23 MPH.
SMOKE DISPERSAL.....FAIR /7430 M/S-M/ AT IGNITION. MAX...GOOD
/11050 M/S-M/.
TIME (CST) 11 AM 1 PM 3 PM 5 PM 7 PM 9 PM
SKY (%).........4 3 2 3 4 39
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............40 42 43 41 36 36
RH..............48 45 39 44 54 54
20 FT WIND......W 10 W 11 W 11 SW 7 SW 7 W 10
20 FT WIND GUST.19 21 20 18 15 21
EYE LEVEL WIND..W 5 W 5 W 5 SW 3 SW 3 W 5
EYE LVL WND GST.9 10 9 8 7 10
MIX HGT (KFT)...2.8 3.6 3.2 0.8 0.7 0.9
TRANSPORT WIND..W 20 W 22 W 22 W 16 W 16 NW 22
VRATE KT-FT/1K..47 69 61 12 10 18
VENTRATE CAT....FAIR GOOD GOOD POOR POOR POOR
TONIGHT
SKY/WEATHER.........CLEAR (0-10 PERCENT) THEN BECOMING PARTLY
CLOUDY (30-40 PERCENT).
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
TEMPERATURE.........MIN 21.
RH..................MAX 68 PERCENT.
EYE LEVEL WINDS.....SOUTHWEST WINDS AROUND 7 MPH EARLY IN THE
EVENING SHIFTING TO THE WEST 7 TO 8 MPH WITH
GUSTS TO AROUND 20 MPH, THEN SHIFTING TO THE
NORTHWEST 6 TO 10 MPH WITH GUSTS TO AROUND 21
MPH IN THE LATE EVENING AND OVERNIGHT BECOMING
LIGHT.
WIND (20 FT)........SOUTHWEST WINDS LESS THAN 5 MPH EARLY IN THE
EVENING SHIFTING TO THE WEST AT 5 MPH, THEN
SHIFTING TO THE NORTHWEST AT 5 MPH WITH GUSTS
IN THE LATE EVENING AND OVERNIGHT BECOMING
LIGHT. ADJUSTMENT FACTOR OF 0.2 USED.
MIXING HEIGHT.......MIN 600 FT AGL.
TRANSPORT WINDS.....WEST 16 TO 22 MPH BECOMING NORTHWEST 5 TO 9
MPH.
SMOKE DISPERSAL.....POOR (490 M/S-M).
THURSDAY
SKY/WEATHER.........PARTLY SUNNY (45-55 PERCENT).
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
TEMPERATURE.........MAX 38.
RH..................MIN 32 PERCENT.
EYE LEVEL WINDS.....LIGHT WINDS BECOMING WEST AT LESS THAN 5 MPH LATE IN
THE MORNING, THEN BECOMING LIGHT LATE IN THE
AFTERNOON. ADJUSTMENT FACTOR OF 0.2 USED.
WIND (20 FT)........LIGHT WINDS BECOMING WEST AROUND 5 MPH LATE IN
THE MORNING, THEN BECOMING LIGHT LATE IN THE
AFTERNOON.
MIXING HEIGHT.......MAX 3900 FT AGL.
TRANSPORT WINDS.....WEST 3 TO 12 MPH INCREASING TO 6 TO 14 MPH IN
THE AFTERNOON.
SMOKE DISPERSAL.....POOR (310 M/S-M) EARLY IN THE MORNING
INCREASING TO FAIR MAX (7270 M/S-M) IN THE
AFTERNOON.
FORECASTER...ELMORE
REQUESTED BY...NICK LEMASTER
TYPE OF REQUEST...PRESCRIBED
.TAG 2600747.0/LSX
.DELDT 01/21/26
.FORMATTERVERSION 2.0.0
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