960  
FNUS73 KLSX 241158  
FWSLSX  
 
SPOT FORECAST FOR MARK TWAIN LAKE...U.S. ARMY CORPS OF ENGINEERS  
NATIONAL WEATHER SERVICE SAINT LOUIS MO  
658 AM CDT MON APR 24 2017  
 
FORECAST IS BASED ON IGNITION TIME OF 1000 CDT ON APRIL 24.  
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE  
NATIONAL WEATHER SERVICE.  
   
DISCUSSION
 
 
THERE IS HEIGHTENED FIRE DANGER AT THE BURN SITE THIS AFTERNOON DUE  
TO THE COMBINATION OF LOW RELATIVE HUMIDITY, DRY FUELS, AND GUSTY,  
SOUTH SOUTHEASTERLY WINDS. LIGHT SOUTH-SOUTHEAST WIND THIS MORNING  
WILL INCREASE TO AROUND 12 MPH WITH HIGHER GUSTS.  
   
REST OF TODAY
 
 
SKY/WEATHER.........SUNNY (5-15 PERCENT).  
CHANCE OF PCPN......0 PERCENT.  
LAL.................NO TSTMS.  
TEMPERATURE.........62 AT IGNITION...MAX 78.  
RH..................44 PERCENT AT IGNITION...MIN 19 PERCENT.  
WIND (20 FT)........WINDS SOUTH AT 8 MPH AT IGNITION...OTHERWISE  
SOUTH WINDS 8 TO 13 MPH WITH GUSTS TO 20 MPH.  
EYE LEVEL WINDS.....SOUTH AT 3 TO 8 MPH.  
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
MIXING HEIGHT.......1000 FT AT IGNITION, 4500 FT AGL AT MAX HEATING.  
TRANSPORT WINDS.....SOUTH AROUND 21 MPH.  
SMOKE DISPERSAL.....VERY GOOD (16580 M/S-M) AT MAX HEATING.  
 
TIME (CDT) 10 AM NOON 2 PM 4 PM 6 PM 8 PM  
SKY (%).........1 10 13 17 16 14  
WEATHER COV.....  
WEATHER TYPE....NONE NONE NONE NONE NONE NONE  
TSTM COV........  
CWR.............0 0 0 0 0 0  
LAL.............1 1 1 1 1 1  
TEMP............62 71 75 78 73 66  
RH..............44 30 24 23 29 40  
20 FT WIND......S 8 S 11 S 12 S 13 S 11 SE 8  
20 FT WIND GUST.15 20 20 20 20 15  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR (20-30 PERCENT).  
CHANCE OF PCPN......0 PERCENT.  
LAL.................NO TSTMS.  
TEMPERATURE.........MIN 51.  
RH..................MAX 75 PERCENT.  
WIND (20 FT)........SOUTH WINDS 7 TO 9 MPH.  
EYE LEVEL WINDS.....SOUTH AROUND 4 MPH.  
HAINES INDEX........N/A.  
MIXING HEIGHT.......N/A.  
TRANSPORT WINDS.....N/A.  
SMOKE DISPERSAL.....N/A.  
   
TUESDAY
 
 
SKY/WEATHER.........PARTLY SUNNY (55-65 PERCENT).  
CHANCE OF PCPN......0 PERCENT.  
LAL.................NO TSTMS.  
TEMPERATURE.........MAX 77.  
RH..................MIN 37 PERCENT.  
WIND (20 FT)........SOUTH WINDS 6 TO 15 MPH. GUSTS UP TO 25 MPH  
INCREASING TO 30 MPH IN THE AFTERNOON.  
EYE LEVEL WINDS.....SOUTH WIND AT 8 TO 12 MPH.  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
MIXING HEIGHT.......4500 FT AGL AT MAX HEATING.  
TRANSPORT WINDS.....SOUTH AROUND 32 MPH.  
SMOKE DISPERSAL.....VERY GOOD (19670 M/S-M) AT MAX HEATING.  
 

 
FORECASTER...CARNEY  
REQUESTED BY...ALLEN MEHRER  
TYPE OF REQUEST...PRESCRIBED  
.TAG 1707632.0/LSX  
 
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