729  
FXUS64 KTSA 190434  
AFDTSA  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE TULSA OK  
1134 PM CDT MON MAR 18 2019  
   
AVIATION
 
 
CONCERNING TAF SITES KTUL/KRVS/KBVO/KMLC/KXNA/KFYV/KFSM/KROG.  
VFR CONDITIONS ARE EXPECTED THROUGH THE MAJORITY OF THE FORECAST  
PERIOD WITH LIGHT WINDS OVERNIGHT. GUSTY SOUTHWEST WINDS WILL  
DEVELOP ACROSS NORTHEAST OKLAHOMA BY MID DAY TUESDAY IN ADVANCE OF  
AN APPROACHING COLD FRONT. MODELS A LITTLE SLOWER WITH FROPA/RAIN  
CHANCES, WHICH WILL PRIMARILY IMPACT KBVO LATE TUESDAY EVENING.  
 

 
   
PREV DISCUSSION
 
/ISSUED 914 PM CDT MON MAR 18 2019/  
   
.UPDATE
 
 
DISCUSSION...  
SURFACE HIGH PRESSURE...CENTERED OVER THE OHIO RIVER  
VALLEY...CONTINUED TO SHIFT EAST-SOUTHEAST THROUGH THE PLAINS THIS  
EVENING. IN RESPONSE...MOSTLY CLEAR CONDITIONS WITH EASTERLY WINDS  
WERE OBSERVED OVER NORTHEAST OKLAHOMA AND NORTHWEST ARKANSAS.  
ACROSS SOUTHEAST OKLAHOMA...A WEAK SURFACE BOUNDARY REMAINED WITH  
LIGHT WINDS VARYING BETWEEN EAST AND SOUTH.  
 
OVERNIGHT TONIGHT...SURFACE HIGH PRESSURE IS FORECAST TO CONTINUE  
ITS EASTWARD MOVEMENT WHILE THE SURFACE BOUNDARY BEGINS LOSE  
DEFINITION. THUS...WITH THE CWA MORE ON THE BACKSIDE OF HIGH  
PRESSURE...WINDS SHOULD BECOME MORE SOUTHERLY ACROSS THE CWA. THE  
EXCEPTION WILL BE THE NORMAL EASTERLY WINDS WITHIN THE ARKANSAS  
RIVER VALLEY OF WESTERN ARKANSAS. WITHIN THE MORE SOUTHERLY  
FLOW...LOW LEVEL MOISTURE LOOKS TO BEGIN SLOWLY LIFTING BACK  
NORTHWARD AHEAD OF THE COLD FRONT FORECAST TO PUSH INTO THE REGION  
TUESDAY NIGHT/WEDNESDAY. THESE CONDITIONS WILL HELP TO KEEP  
OVERNIGHT LOWS SLIGHTLY WARMER TONIGHT COMPARED TO LAST  
NIGHT...WITH FORECAST LOWS OF MID 30S TO LOWER 40S POSSIBLE.  
 
FOR THE EVENING UPDATE...OVERALL FORECAST LOOKS TO HAVE A GOOD  
HANDLE ON THE MENTIONED ABOVE. HAVE ONLY ADDED SOME MINOR TWEAKS  
TO HOURLY TEMP/DEWPOINT/WIND GRIDS TO ACCOUNT FOR LATEST TRENDS  
AND OBSERVATIONS.  
 

 
   
TSA WATCHES/WARNINGS/ADVISORIES
 
 
OK...NONE.  
AR...NONE.  

 
 

 
 
AVIATION.....12  
 
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