677  
FNUS73 KLSX 061131  
FWSLSX  
 
SPOT FORECAST FOR MCDONNELL PARK...ST. LOUIS COUNTY PARKS FORESTRY  
NATIONAL WEATHER SERVICE SAINT LOUIS MO  
631 AM CDT TUE APR 6 2021  
 
FORECAST IS BASED ON IGNITION TIME OF 1000 CDT ON APRIL 06.  
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE  
NATIONAL WEATHER SERVICE.  
   
DISCUSSION
 
 
UNSEASONABLY WARM CONDITIONS WILL CONTINUE TODAY AND TONIGHT WITH GUSTY  
SOUTHERLY WINDS. THERE IS A CHANCE OF SHOWERS AND STORMS LATE TONIGHT,  
MAINLY ACROSS NORTHEAST AND CENTRAL MISSOURI, THEN SHOWERS AND STORMS  
ARE LIKELY WEDNESDAY AND WEDNESDAY EVENING AS A COLD FRONT MOVES THROUGH  
OUR AREA. MUCH COOLER AIR WILL MOVE INTO THE REGION WEDNESDAY NIGHT AND  
THURSDAY WITH LIGHT SHOWERS LINGERING THURSDAY AND THURSDAY EVENING.  
 
   
REST OF TODAY
 
 
SKY/WEATHER.........MOSTLY SUNNY (30-40 PERCENT).  
TEMPERATURE.........72 AT IGNITION...MAX 82.  
RH..................53 PERCENT AT IGNITION...MIN 33 PERCENT.  
WIND (20 FT)........WINDS SOUTH AT 11 MPH AT IGNITION...OTHERWISE  
SOUTH WINDS 11 TO 13 MPH WITH GUSTS TO AROUND  
22 MPH.  
EYE LEVEL WINDS.....WINDS SOUTH AT 4 MPH AT IGNITION...OTHERWISE  
SOUTH WINDS 4 TO 5 MPH WITH GUSTS TO AROUND  
9 MPH USING THE WIND FACTOR ADJUSTMENT OF 0.4.  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH AT IGNITION...MAX 4.  
MIXING HEIGHT.......2500 FT AGL AT IGNITION...OTHERWISE MAX 7200 FT  
AGL.  
TRANSPORT WINDS.....SOUTH 21 TO 23 MPH.  
SMOKE DISPERSAL.....FAIR /7560 M/S-M/ AT IGNITION. MAX...EXCELLENT  
/21460 M/S-M/.  
 
TIME (CDT) 10 AM NOON 2 PM 4 PM 6 PM 8 PM  
SKY (%).........12 27 44 49 58 51  
WEATHER COV.....  
WEATHER TYPE....NONE NONE NONE NONE NONE NONE  
TSTM COV........  
TEMP............72 79 82 82 79 75  
RH..............53 41 34 33 36 45  
20 FT WIND......S 11 S 12 S 13 S 13 S 13 S 12  
20 FT WIND GUST.19 21 22 21 22 19  
EYE LEVEL WIND..S 5 S 6 S 6 S 6 S 6 S 6  
EYE LVL WND GST.9 10 10 10 10 9  
MIX HGT (KFT)...2.5 5.7 7.1 6.9 5.7 1.8  
TRANSPORT WIND..SW 22 S 23 S 22 S 22 S 21 S 20  
HAINES INDEX....3 4 4 4 4 4  
VRATE KT-FT/1K..48 114 135 132 103 31  
VENTRATE CAT....FAIR VYGD VYGD VYGD VYGD POOR  
 

 
 
FORECASTER...GKS  
REQUESTED BY...JASON PRATTE  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2107982.0/LSX  
.DELDT 04/06/21  
.FORMATTERVERSION 1.0.26  
 
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