241  
FXUS64 KOUN 202334  
AFDOUN  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE NORMAN OK  
634 PM CDT MON AUG 20 2018  
   
DISCUSSION
 
 
THE AUGUST 21-22, 2018 00 UTC TAF DISCUSSION FOLLOWS:  
 

 
   
AVIATION
 
 
THE PRIMARY AVIATION ISSUE THROUGH THE TAF PERIOD WILL BE  
RESTRICTED VISIBILITIES FROM SMOKE, ESPECIALLY ACROSS WESTERN  
OKLAHOMA.  
 
SATELLITE IMAGERY CONTINUES TO SHOW SMOKE UPSTREAM, SO SMOKE MAY  
CONTINUE TO IMPACT KCSM AND KWWR TONIGHT. BRIEF MVFR CONDITIONS  
ARE POSSIBLE. TRENDS WILL HAVE TO BE MONITORED AT OTHER TERMINALS  
FARTHER EAST.  
 
OTHERWISE, NORTHERLY WINDS SHOULD WEAKEN THIS EVENING AND  
GRADUALLY VEER TO THE EAST AND THEN SOUTHEAST THROUGH THE TAF  
PERIOD.  
 
MAHALE  
 

 
   
PREV DISCUSSION
 
/ISSUED 209 PM CDT MON AUG 20 2018/  
 
DISCUSSION...  
RELATIVELY DRY AND WARM WEATHER WILL CONTINUE FOR ANOTHER DAY  
WHILE THE AIR MASS DRIFTS FROM SOUTHERN SASKATCHEWAN TO EASTERN  
KANSAS BY MID-WEEK. ALOFT, SEVERAL WEAK UPPER WAVES WILL ROUND THE  
LARGE RIDGE OVER THE SOUTHWESTERN U.S. THIS WILL PASS ACROSS  
SOUTHERN COLORADO AND SOUTHERN KANSAS EARLY WEDNESDAY AND EARLY  
THURSDAY IN AN AREA OF UPSLOPE BOUNDARY LAYER FLOW BENEATH  
INCREASING MID-LEVEL MOISTURE. IT STILL APPEARS THAT AN MCS IS  
LIKELY BOTH OF THESE MORNINGS. THE DEGREE TO WHICH THEY AFFECT  
OKLAHOMA WILL BE LARGELY DETERMINED BY THE POSITION OF THE UPPER  
RIDGE TO THE WEST AND THE SOUTHERN EXTENT OF SUFFICIENT WESTERN  
FLOW. NORTHERN OKLAHOMA WILL HAVE GOOD CHANCES FOR RAIN WITH  
RAPIDLY DECREASING CHANCES TOWARD SOUTHERN OKLAHOMA. ON FRIDAY  
MORNING THERE IS A WEAKER SIGNAL FOR A SIMILAR SITUATION, BUT  
MAYBE A BIT FARTHER NORTH. ALSO, DURING THE SECOND HALF OF THE  
WEEK THE UPPER RIDGE WILL BE BUILDING A BIT NORTHEAST, BRINGING  
HOT CONDITIONS TO OKLAHOMA AND IN PARTICULAR SOUTHWESTERN OKLAHOMA  
AND ADJACENT PARTS OF NORTHERN TEXAS. GUSTY SOUTH WINDS ARE  
EXPECTED TO BEGIN ON THURSDAY AND LAST INTO THE WEEKEND WHEN  
TEMPERATURES ARE AT THEIR HIGHEST. THIS WILL TREND TOWARD HEAT  
ADVISORIES IN PART OF CENTRAL OR EASTERN OKLAHOMA WHILE AREAS OF  
THE SOUTHWEST PART OF THE STATE AND ADJACENT AREAS OF TEXAS SEE  
MINIMUM RELATIVE HUMIDITY AROUND 20 PERCENT.  
 

 
   
PRELIMINARY POINT TEMPS/POPS
 
 
OKLAHOMA CITY OK 64 86 68 85 / 0 0 10 30  
HOBART OK 64 92 70 92 / 0 0 10 20  
WICHITA FALLS TX 67 94 71 95 / 0 0 0 10  
GAGE OK 58 87 67 84 / 0 0 40 40  
PONCA CITY OK 62 86 67 78 / 0 0 30 50  
DURANT OK 67 91 68 90 / 0 0 0 10  
 

 
   
OUN WATCHES/WARNINGS/ADVISORIES
 
 
OK...NONE.  
TX...NONE.  

 
 

 
 
30/10/10  
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab OK Page
The Nexlab TX Page Main Text Page