354
FNUS73 KLSX 281638
FWSLSX

Spot Forecast for HAZMAT...St. Clair County EMA
National Weather Service Saint Louis MO
1138 AM CDT Fri Aug 28 2026

Forecast is based on forecast start time of 1100 CDT on August 28.
If conditions become unrepresentative, contact the
National Weather Service.

.DISCUSSION...

Winds through the day are expected to be light out of the north-
northeast shifting to the east by the evening. Dry air and the
warming surface will allow for instability between the surface
and the mixing height, which will be around 5000-6000 ft into the
afternoon, allowing any plumes to rise quickly.

.REST OF TODAY...

Sky/weather.........Sunny (0-10 percent).
CWR.................0 percent.
Chance of thunder...0 percent.
Temperature.........80 at forecast start...Max 88.
RH..................56 percent at forecast start...Min 39 percent.
Surface winds (mph).Light winds.
Mixing height.......4800 ft AGL at forecast start...otherwise max
                    6400 ft AGL.

TIME (CDT)      11 AM  1 PM   3 PM   5 PM   7 PM   9 PM
Sky (%).........4      11     2      5      11     8
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............80     83     86     87     82     75
RH..............56     44     40     39     47     64
Surface wind....N 3    NE 5   NE 5   NE 5   E 3    E 1
Surface wnd gst.6      7      6             5      2
Mix hgt (kft)...4.8    6.3    6.4    5.7    0.5    0.4

$$
Forecaster...Asel/MRB
Requested by...Bryan Whitaker
Type of request...HAZMAT
.TAG 2620800.0/LSX
.DELDT 08/28/26
.FormatterVersion 2.0.0