433
FNUS73 KLSX 071249
FWSLSX
SPOT FORECAST FOR MAG HOLLOW UNIT 8...MDC
NATIONAL WEATHER SERVICE SAINT LOUIS MO
749 AM CDT THU AUG 7 2025
FORECAST IS BASED ON IGNITION TIME OF 1000 CDT ON AUGUST 07.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE
NATIONAL WEATHER SERVICE.
DISCUSSION
HOT AND MODERATELY HUMID CONDITIONS CAN BE EXPECTED AGAIN TODAY,
WITH LIGHT SOUTHERLY WINDS. ASIDE FROM THE IMPACTS TO THE FIRE
ENVIRONMENT, YOU CAN EXPECT HEAT INDEX VALUES TO REMAIN IN THE 90S
AND REACH NEAR 100 DEGREES THROUGHOUT THE BURN WINDOW TODAY.
MODERATELY UNSTABLE CONDITIONS CAN BE EXPECTED IN THE FIRE
ENVIRONMENT DUE TO DEEP MIXING, BUT LIGHT WINDS MAY LIMIT SMOKE
DISPERSION SOMEWHAT. WHILE DRY CONDITIONS ARE MOST LIKELY, THERE
IS A LOW PROBABILITY SCENARIO THAT COULD LEAD TO A STRAY SHOWER OR
THUNDERSTORM LATE IN THE AFTERNOON AND EVENING. WHILE UNLIKELY,
THIS SITUATION CANNOT BE COMPLETELY DISCOUNTED, AS ANY SUCH STORM
MAY BE CAPABLE OF PRODUCING GUSTY WINDS, BURSTS OF HEAVY RAIN,
AND LIGHTNING.
CALM WINDS AND GOOD HUMIDITY RECOVERY CAN BE EXPECTED OVERNIGHT.
SIMILAR HEAT AND HUMIDITY CAN BE EXPECTED TOMORROW AFTERNOON AS
WELL, WITH A SLIGHT INCREASE IN SOUTHERLY WIND SPEEDS AND LIKEWISE
AND MODEST IMPROVEMENT IN SMOKE DISPERSION.
REST OF TODAY
SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT).
CWR.................20 PERCENT LATE IN THE AFTERNOON.
CHANCE OF THUNDER...20 PERCENT LATE IN THE AFTERNOON.
TEMPERATURE.........85 AT IGNITION...MAX 93.
RH..................63 PERCENT AT IGNITION...MIN 46 PERCENT.
EYE LEVEL WINDS.....1 TO 3 MPH OUT OF THE SOUTH-SOUTHEAST.
STRONGER, ERRATIC WIND GUSTS POSSIBLE WITH ANY THUNDERSTORMS.
WIND (20 FT)........2 TO 5 MPH OUT OF THE SOUTH-SOUTHEAST.
STRONGER, ERRATIC WIND GUSTS POSSIBLE WITH ANY THUNDERSTORMS.
MIXING HEIGHT.......2200 FT AGL AT IGNITION...OTHERWISE MAX 6500 FT AGL.
TRANSPORT WINDS.....SOUTH 6 TO 9 MPH.
SMOKE DISPERSAL.....POOR /2370 M/S-M/ AT IGNITION. MAX...FAIR /6760 M/S-M/.
TIME (CDT) 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM 7PM 8PM 9PM
SKY (%).........23 27 30 32 33 35 36 38 41 43 42 39
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............10 10 10 10 10 10 10 10 10 10 10 10
CHC OF THDR (%).M M M M M M M M M M M M
TEMP............85 88 90 92 92 93 93 93 91 89 86 82
RH..............63 57 54 51 51 47 47 46 50 54 61 69
20 FT WIND DIR..SW S S S S S S SE SE SE SE S
20 FT WIND SPD..3 4 3 4 4 5 5 5 5 4 4 4
20 FT WIND GUST.6 8 7 8 8 8 9 9 10 10 7 8
EYE LVL WND DIR.SW S S S S S S SE SE SE SE S
EYE LVL WND SPD.1 2 1 2 2 2 2 2 2 2 2 2
EYE LVL WND GST.3 4 3 4 4 4 4 4 5 5 3 4
MIX HGT (KFT)...2.2 3.5 5.4 6.0 6.1 6.5 6.1 4.9 2.7 0.5 0.4 0.4
TRANSP WIND DIR.SW SW SW S S S S S S S S S
TRANSP WIND SPD.8 8 6 6 7 7 8 9 9 9 8 10
VRATE KT-FT/1K..15 25 27 30 37 39 43 40 21 4 3 4
VENTRATE CAT....PR PR PR PR PR PR FR PR PR PR PR PR
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT).
CWR.................20 PERCENT IN THE EVENING.
CHANCE OF THUNDER...20 PERCENT IN THE EVENING.
TEMPERATURE.........MIN 72.
RH..................MAX 87 PERCENT.
EYE LEVEL WINDS.....ERRATIC WIND GUSTS POSSIBLE WITH ANY THUNDERSTORMS.
BUT OTHERWISE, WINDS MORE LIKELY TO BE CALM.
WIND (20 FT)........ERRATIC WIND GUSTS POSSIBLE WITH ANY THUNDERSTORMS.
BUT OTHERWISE, WINDS MORE LIKELY TO BE CALM.
MIXING HEIGHT.......MIN 400 FT AGL.
TRANSPORT WINDS.....SOUTH 8 TO 12 MPH.
SMOKE DISPERSAL.....POOR (440 M/S-M).
FRIDAY
SKY/WEATHER.........SUNNY (10-20 PERCENT).
CWR.................10 PERCENT.
CHANCE OF THUNDER...10 PERCENT.
TEMPERATURE.........MAX 94.
RH..................MIN 44 PERCENT.
EYE LEVEL WINDS.....SOUT WINDS 2 TO 4 MPH.
WIND (20 FT)........SOUTH WINDS 5 TO 8 MPH.
MIXING HEIGHT.......MAX 5700 FT AGL.
TRANSPORT WINDS.....SOUTH 9 TO 16 MPH.
SMOKE DISPERSAL.....POOR (440 M/S-M) EARLY IN THE MORNING
INCREASING TO GOOD MAX (12470 M/S-M) IN THE
AFTERNOON.
FORECASTER...19
REQUESTED BY...KYLE LORENZ
TYPE OF REQUEST...PRESCRIBED
.TAG 2519481.0/LSX
.DELDT 08/07/25
.FORMATTERVERSION 2.0.0
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