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  
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