626
FNUS73 KLSX 232314
FWSLSX
SPOT FORECAST FOR WELDON SPRING RX...USFS
NATIONAL WEATHER SERVICE SAINT LOUIS MO
514 PM CST MON FEB 23 2026
FORECAST IS BASED ON IGNITION TIME OF 1700 CST ON FEBRUARY 23.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE
NATIONAL WEATHER SERVICE.
DISCUSSION
WHILE LIGHT SOUTHERLY WINDS MAY STILL BE IN PLACE AT IGNITION TIME
(9 AM), GUSTY SOUTHWEST WINDS AND LOW HUMIDITY ARE EXPECTED
THROUGHOUT THE AFTERNOON. WHILE WE ARE CONFIDENT IN THE POTENTIAL
FOR WINDY AND DRY CONDITIONS OVERALL, THE PRESENCE OF DENSE HIGH
CLOUD COVER REDUCES OUR CONFIDENCE IN THE EXACT VALUES OF
TEMPERATURE AND HUMIDITY, AS PERSISTENT AND THICK CLOUDS COULD
LEAD TO A COOLER, SLIGHTLY MORE HUMID RESULT. THIS MAY ALSO AFFECT
THE DEPTH OF THE MIXING LATER AS WELL, ALTHOUGH WE DO EXPECT WINDS
TO BE STRONG ENOUGH TO PROVIDE GOOD SMOKE VENTILATION REGARDLESS.
WIND SPEEDS WILL WEAKEN QUICKLY NEAR SUNSET, AND A WEAK COLD FRONT
WILL BRING A SWITCH TO LIGHT NORTHERLY WINDS AND GOOD HUMIDITY
RECOVERIES OVERNIGHT. PRECIPITATION IS NOT EXPECTED.
NOTE: WE RECOMMEND REQUESTING ANOTHER SPOT FORECAST DELIVERED
TOMORROW MORNING, SO THAT WE CAN PROVIDE UPDATED FORECAST
INFORMATION. WE WILL ALSO EMAIL A HYSPLIT DISPERSION MODEL RUN
SHORTLY, AS THE AUTOMATED TRAJECTORY RUN YOU ALREADY RECEIVED
LIKELY WILL NOT BE EFFECTIVE FOR LOCAL SMOKE DISPERSION
APPLICATIONS.
TUESDAY
SKY/WEATHER.........PARTLY SUNNY (55-65 PERCENT).
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
TEMPERATURE.........MAX 55 TO 60.
RH..................MIN 30 TO 35 PERCENT.
EYE LEVEL WINDS.....SOUTH WINDS AROUND 1 TO 3 MPH IN THE MORNING,
GRADUALLY SHIFTING TO THE SOUTHWEST AND
INCREASING 5 TO 8 MPH WITH GUSTS TO AROUND
16 MPH FROM ROUGHLY NOON TO 5 PM.
WIND (20 FT)........SOUTH WINDS AROUND 3 TO 6 MPH IN THE MORNING,
GRADUALLY SHIFTING TO THE SOUTHWEST AND
INCREASING TO 11 TO 14 MPH WITH GUSTS TO
AROUND 31 MPH FROM ROUGHLY NOON TO 5 PM.
MIXING HEIGHT.......MAX 3300 FT AGL.
TRANSPORT WINDS.....SOUTH 13 TO 22 MPH INCREASING TO SOUTHWEST
26 TO 32 MPH IN THE LATE MORNING AND AFTERNOON.
SMOKE DISPERSAL.....POOR (1230 M/S-M) EARLY IN THE MORNING INCREASING
TO GOOD MAX (14440 M/S-M) IN THE AFTERNOON.
FORECASTER...19
REQUESTED BY...J. SIMMS
TYPE OF REQUEST...PRESCRIBED
.TAG 2603670.0/LSX
.DELDT 02/23/26
.FORMATTERVERSION 2.0.0
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