893
FNUS73 KLSX 260944
FWSLSX

Spot Forecast for RPO_2C...U.S. Army Corps of Engineers
National Weather Service Saint Louis MO
444 AM CDT Wed Aug 26 2026

Forecast is based on ignition time of 1200 CDT on August 26.
If conditions become unrepresentative, contact the
National Weather Service.

.DISCUSSION...
Temperatures will warmup into upper 80s to low 90s by early this
afternoon with south/southwest winds ahead of a cold front. This
front is expected to pass through the area around 3-4 PM, with winds
turning out of the northwest. There is a low chance (10%) of a
thunderstorm with the front, but better chances are to the east.

.REST OF TODAY...

Sky/weather.........Mostly sunny (25-35 percent).
CWR.................4 percent.
Chance of thunder...12 percent.
Temperature.........89 at ignition...Max 93.
RH..................57 percent at ignition...Min 46 percent.
Eye level winds.....Winds southwest around 2 to 3 mph at ignition,
                    turning to the northwest around 4 mph late afternoon
                    using an adjustment factor of 0.4.
Wind (20 ft)........Winds southwest at 6 mph at
                    ignition...otherwise West winds 6 to 8 mph
                    shifting to the northwest around 9 mph late in
                    the afternoon.
Mixing height.......3200 ft AGL at ignition...otherwise max 4600 ft
                    AGL.
Transport winds.....West 7 to 12 mph.
Smoke dispersal.....Poor /2990 m/s-m/ at ignition. Max...fair /6470
                    m/s-m/.

TIME (CDT)      NOON   2 PM   4 PM   6 PM   8 PM   10 PM
Sky (%).........28     17     43     28     52     28
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE   NONE
Tstm cov........
CWR.............0      0      0      0      0      0
Chc of thdr (%).0      0      10     10     10     0
Temp............89     93     93     91     83     76
RH..............57     51     47     47     63     76
20 ft wind......SW 6   SW 7   W 8    W 8    NW 6   NW 5
20 ft wind gust.9      11     11     11     9      7
Eye level wind..SW 3   SW 3   W 4    W 4    NW 3   NW 2
Eye lvl wnd gst.4      5      5      5      4      3
Mix hgt (kft)...3.2    4.0    4.6    2.4    0.5    0.5
Transport wind..W 7    W 9    W 9    W 10   N 9    N 8
Vrate kt-ft/1K..19     32     37     22     4      3
Ventrate Cat....POOR   POOR   POOR   POOR   POOR   POOR

.TONIGHT...

Sky/weather.........Partly cloudy (30-40 percent) then becoming
                    mostly cloudy (45-55 percent) then becoming
                    mostly clear (15-25 percent).
CWR.................3 percent.
Chance of thunder...11 percent.
Temperature.........Min 67.
RH..................Max 90 percent.
Eye level winds.....Northwest around 3 mph in the evening becoming
                    light and variable.
Wind (20 ft)........Northwest winds 5 to 7 mph in the evening
                    becoming light.
Mixing height.......Min 400 ft AGL.
Transport winds.....West 9 to 10 mph shifting to the north 7 to 10
                    mph early in the evening.
Smoke dispersal.....Poor (410 m/s-m).

.THURSDAY...

Sky/weather.........Mostly sunny (20-30 percent).
CWR.................0 percent.
Chance of thunder...0 percent.
Temperature.........Max 88.
RH..................Min 43 percent.
Eye level winds.....Northwest around 3 mph using an adjustment factor
                    of 0.4.
Wind (20 ft)........Northwest winds 5 to 8 mph early in the morning
                    becoming light, then becoming north 5 to 8 mph
                    in the late morning and afternoon.
Mixing height.......Max 6800 ft AGL.
Transport winds.....North 7 to 12 mph.
Smoke dispersal.....Poor (460 m/s-m) early in the morning
                    increasing to good max (9630 m/s-m) in the
                    afternoon.

$$
Forecaster...Gosselin
Requested by...Brian Stoff
Type of request...PRESCRIBED
.TAG 2620511.0/LSX
.DELDT 08/26/26
.FormatterVersion 2.0.0