494  
FNUS73 KLSX 221804  
FWSLSX  
 
SPOT FORECAST FOR HIGH RIDGE...MISSOURI DEPT. OF NATURAL RESOURCES  
NATIONAL WEATHER SERVICE SAINT LOUIS MO  
104 PM CDT WED MAR 22 2017  
 
FORECAST IS BASED ON IGNITION TIME OF 1100 CDT ON MARCH 23.  
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE  
NATIONAL WEATHER SERVICE.  
   
DISCUSSION
 
 
EAST WINDS WILL CONTINUE TODAY WITH RELATIVE HUMIDITY VALUES DROPPING  
INTO UPPER 20 PERCENT RANGE. MUCH OF THE AREA WILL SEE HEIGHTENED FIRE  
DANGER THIS AFTERNOON. A STORM SYSTEM WILL DEVELOP OVER THE GREAT  
PLAINS ON THURSDAY WHICH WILL TURN THE WIND BACK TO TO THE SOUTH  
AND BRING INCREASING HUMIDITY AND RAIN CHANCES TO THE AREA FOR THE  
END OF THE WEEK INTO THE WEEKEND.  
   
THURSDAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT) THEN BECOMING  
MOSTLY SUNNY (35-45 PERCENT). CHANCE OF RAIN  
SHOWERS LATE IN THE MORNING.  
CHANCE OF PCPN......40 PERCENT.  
LAL.................NO TSTMS.  
TEMPERATURE.........46 AT IGNITION...MAX 68.  
RH..................68 PERCENT AT IGNITION...MIN 45 PERCENT.  
WIND (20 FT)........WINDS SOUTHEAST AT 10 MPH AT  
IGNITION...OTHERWISE SOUTH WINDS 10 TO 13 MPH.  
EYE LEVEL WINDS.....WINDS SOUTHEAST AT 4 MPH AT  
IGNITION...OTHERWISE SOUTH WINDS 4 TO 5 MPH.  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
MIXING HEIGHT.......1000 FT AGL AT IGNITION,  
2400 FT AGL AT MAX HEATING.  
TRANSPORT WINDS.....SOUTH AROUND 26 MPH.  
SMOKE DISPERSAL.....FAIR (8560 M/S-M) AT MAX HEATING.  
 
TIME (CDT) 11 AM 1 PM 3 PM 5 PM 7 PM 9 PM  
SKY (%).........85 71 48 33 25 29  
WEATHER COV.....CHANCE  
WEATHER TYPE....RNSHWR NONE NONE NONE NONE NONE  
TSTM COV........  
CWR.............40 10 10 10 0 0  
LAL.............1 1 1 1 1 1  
TEMP............46 54 63 68 65 63  
RH..............68 59 52 47 54 60  
20 FT WIND......SE 10 S 10 S 12 S 13 S 10 S 11  
20 FT WIND GUST.20 20 20 20 15 20  
   
THURSDAY NIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY (25-35 PERCENT).  
CHANCE OF PCPN......0 PERCENT.  
LAL.................NO TSTMS.  
TEMPERATURE.........MIN 58.  
RH..................MAX 80 PERCENT.  
WIND (20 FT)........SOUTH WINDS 8 TO 11 MPH.  
EYE LEVEL WINDS.....SOUTH WINDS 3 TO 4 MPH.  
HAINES INDEX........N/A.  
MIXING HEIGHT.......N/A.  
TRANSPORT WINDS.....N/A.  
SMOKE DISPERSAL.....N/A.  
 

 
FORECASTER...BYRD  
REQUESTED BY...ROXIE CAMPBELL  
TYPE OF REQUEST...PRESCRIBED  
.TAG 1704932.0/LSX  
 
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