152
FNUS73 KLSX 091206
FWSLSX

Spot Forecast for Mark Twain Lake...USACE
National Weather Service Saint Louis MO
706 AM CDT Thu Oct 9 2025

Forecast is based on ignition time of 1200 CDT on October 09.
If conditions become unrepresentative, contact the
National Weather Service.

.DISCUSSION...
Dry conditions and near normal temperatures are expected today
with highs around 70, similar to yesterday.  Eye level winds
will be less than 5 mph throughout the day.  Minimum relative
humidity values will drop to around 35 percent.

Mixing heights will be around 3000 feet AGL at ignition and
around 4500 feet AGL by 3-4 PM.  Even with decent mixing, weak
winds will cause poor smoke dispersal throughout the day.


.REST OF TODAY...

Sky/weather.........Sunny (0-10 percent).
CWR.................0 percent.
Chance of thunder...0 percent.
Temperature.........65 at ignition...Max 71.
RH..................48 percent at ignition...Min 38 percent.
Wind (20 ft)........Winds southeast at 5 mph at
                    ignition...otherwise Southeast winds around 5
                    mph.
Mixing height.......2900 ft AGL at ignition...otherwise max 4600 ft
                    AGL.
Transport winds.....Southeast 6 to 7 mph.
Smoke dispersal.....Poor /2700 m/s-m/ at ignition. Max...poor /3650
                    m/s-m/.

TIME (CDT)      NOON   2 PM   4 PM   6 PM   8 PM   10 PM
Sky (%).........1      2      3      2      4      4
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............65     69     71     67     60     54
RH..............48     42     38     45     60     71
20 ft wind......SE 5   SE 5   SE 5   SE 5   SE 5   SE 5
20 ft wind gust.10     10     10     9      8      9
Mix hgt (kft)...2.9    4.6    4.6    1.0    0.4    0.4
Transport wind..SE 7   SE 6   SE 6   SE 7   SE 9   SE 9
Vrate kt-ft/1K..17     23     23     6      3      3
Ventrate Cat....POOR   POOR   POOR   POOR   POOR   POOR

$$
Forecaster...Britt
Requested by...Aaron Eckelkamp
Type of request...PRESCRIBED
.TAG 2523223.0/LSX
.DELDT 10/09/25
.FormatterVersion 2.0.0