723
FNUS73 KLSX 301247
FWSLSX

Spot Forecast for White River Trace Rxb...Missouri Department of Conservation
National Weather Service Saint Louis MO
747 AM CDT Wed Jul 30 2025

Forecast is based on ignition time of 0800 CDT on July 30.
If conditions become unrepresentative, contact the
National Weather Service.

.DISCUSSION...
There is a threat for strong to severe thunderstorms across much
of the area this afternoon into this evening ahead of and along a
cold front. This cold front will shift winds to northerly by
late tomorrow morning and elevate them to around 10mph. A cooler and drier
airmass will follow the front, but minimum RH values will still
remain in the 50s and 60s through the weekend. Ventilation rates
are forecast to improve following the passage of the front as well.

.REST OF TODAY...

Sky/weather.........Mostly sunny (30-40 percent). Slight chance of
                    showers and thunderstorms early in the
                    afternoon. Chance of showers and thunderstorms
                    late in the afternoon.
CWR.................0 percent increasing to 30 percent.
Chance of thunder...Increasing to about 30-40 percent this afternoon.
Temperature.........78 at ignition...Max 94.
RH..................82 percent at ignition...Min 48 percent.
Eye level winds.....Light and variable.
Wind (20 ft)........Winds southeast at 2 mph at
                    ignition...otherwise Light winds. Gusty and
                    erratic winds expected near thunderstorms in
                    the afternoon.
Mixing height.......700 ft AGL at ignition...otherwise max 6000 ft
                    AGL.
Transport winds.....South 3 to 7 mph shifting to the southwest
                    around 5 mph early in the afternoon, then
                    shifting to the north around 7 mph late in the
                    afternoon shifting to the south around 5 mph
                    late in the afternoon.
Smoke dispersal.....Poor /640 m/s-m/ at ignition. Max...poor /4100
                    m/s-m/.

TIME (CDT)      8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM 7PM
Sky (%).........14  13  10  16  24  34  41  43  45  55  54  62
Weather cov.....                    SCH SCH SCH CHC CHC CHC CHC
Weather type....                    RW  RW  RW  RW  RW  RW  RW
Tstm cov........                    SCH SCH SCH CHC CHC CHC CHC
CWR.............0   10  0   0   10  20  20  20  30  30  40  40
Chc of thdr (%).M   M   M   M   M   M   M   M   M   M   M   M
Temp............78  84  88  90  92  93  93  94  93  92  88  86
RH..............82  70  66  60  54  52  51  48  49  52  59  65
20 FT wind dir..SE  S   S   SE  SE  SE  SE  SE  S   SW  NE  E
20 FT wind spd..2   2   2   2   2   2   2   2   2   2   2   2
20 FT wind gust.6   6   7   7   6   6   6   6   6   6   6   7
Eye lvl wnd dir.SE  S   S   SE  SE  SE  SE  SE  S   SW  NE  E
Eye lvl wnd spd.1   1   1   1   1   1   1   1   1   1   1   1
Eye lvl wnd gst.3   3   3   3   3   3   3   3   3   3   3   3
Mix hgt (kft)...0.7 1.3 2.2 3.8 4.5 5.4 5.4 6.0 4.4 3.8 2.3 0.8
Transp wind dir.S   S   S   S   S   S   SW  S   N   S   SE  E
Transp wind spd.7   7   6   5   3   3   5   5   7   5   7   5
Vrate kt-ft/1K..4   8   11  15  14  16  22  24  26  15  14  3
Ventrate Cat....PR  PR  PR  PR  PR  PR  PR  PR  PR  PR  PR  PR

$$
Forecaster...Gosselin
Requested by...Matthew Peter
Type of request...PRESCRIBED
.TAG 2518865.0/LSX
.DELDT 07/30/25
.FormatterVersion 2.0.0