137  
FXUS64 KTSA 211526  
AFDTSA  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE TULSA OK  
1026 AM CDT MON AUG 21 2017  
   
DISCUSSION
 
 
HAVE ONLY MADE SOME MINOR ADJUSTMENTS TO THE GRIDS  
FOR TODAY TO BETTER REFLECT CURRENT TRENDS.  
 

 
   
PREV DISCUSSION
 
/ISSUED 545 AM CDT MON AUG 21 2017/  
 
AVIATION...  
CONCERNING TAF SITES KTUL/KRVS/KBVO/KMLC/KXNA/KFYV/KFSM/KROG.  
VFR CONDITIONS WILL PREVAIL. ANY AFTERNOON STORM CHANCES ARE TOO  
LOW FOR MENTION AT SPECIFIC TERMINALS. AFTER MIDNIGHT STORMS  
ACROSS KS MAY GRADUALLY SPREAD SOUTHWARD BUT IMPACTS INTO NE OK  
MAY NOT BE UNTIL JUST BEYOND THIS FORECAST PERIOD.  
 
PREV DISCUSSION... /ISSUED 424 AM CDT MON AUG 21 2017/  
 
DISCUSSION...  
 
ANOTHER QUIET NIGHT AND EARLY MORNING WITH NEAREST CONVECTION WELL  
WEST OF THE AREA. THE PRIMARY FOCUS TODAY WILL BE VIEWING  
POTENTIAL FOR THE ECLIPSE. UNFORTUNATELY, IT LOOKS LIKE THERE WILL  
BE A BIT MORE CLOUD COVER EARLY THIS AFTERNOON THAN PREVIOUS DAYS  
AS MOISTURE STREAMS UP INTO THE REGION...SO IT COULD BE HIT OR  
MISS FOR ECLIPSE VIEWING. THUNDERSTORM CHANCES ALSO LOOK A BIT  
MORE FAVORABLE WITH THE INCREASE IN MID-LEVEL MOISTURE, ESPECIALLY  
OVER PORTIONS OF FAR EASTERN OKLAHOMA AND WESTERN ARKANSAS.  
ANOTHER AREA TO TO WATCH FOR ISOLATED/SCATTERED CONVECTION THIS  
AFTERNOON WILL BE OVER THE TEXAS PANHANDLE EXTENDING NORTHEASTWARD  
INTO WESTERN AND NORTH-CENTRAL OKLAHOMA AS SHORTWAVE TROUGH  
SKIRTS THE RIDGE. THIS INCREASE IN CLOUD COVER, AND EXPECTED LIGHT  
IMPACTS FROM THE ECLIPSE, SHOULD KEEP HIGH TEMPERATURES FROM  
REACHING THE VALUES SEEN OVER THE WEEKEND. HOWEVER, WITH HIGH  
TEMPERATURES IN THE UPPER 80S TO MID 90S, THE DAY WILL STILL BE  
HOT AND MUGGY WITH HEAT INDICES ACROSS MUCH OF THE CWA REACHING  
100 TO 104 DEGREES.  
 
FOCUS THEN SHIFTS TO TUESDAY AND WEDNESDAY WITH THE APPROACH OF THE  
NEXT FRONTAL SYSTEM. UPPER LEVEL LOW CURRENTLY OFF THE COAST OF  
CALIFORNIA WILL RETROGRADE SLIGHTLY AS A TROUGH DROPS DOWN INTO  
THE NORTHERN ROCKIES. THIS SYSTEM WILL QUICKLY DEEPEN AS IT MOVES  
OUT ONTO THE PLAINS. THE ATTENDANT COLD FRONT WILL NEAR THE REGION  
TUESDAY MORNING/EARLY AFTERNOON. SHOWERS AND THUNDERSTORMS WILL  
INCREASE IN COVERAGE THROUGH THE DAY TUESDAY AS THE FRONT  
PROGRESSES SOUTHWARD...CONTINUING OVERNIGHT AS THE FRONT REACHES  
THE RED RIVER VALLEY BY WEDNESDAY MORNING. HEAVY RAIN IS LIKELY  
WITH THIS SYSTEM, AND HEAVIEST PRECIPITATION AXIS CONTINUING TO  
LOOK FOCUSED NEAR THE INTERSTATE 40 CORRIDOR. WITHIN THE HEAVY  
RAIN AXIS, 2 TO 3 INCHES ARE LIKELY WITH LOCALLY HIGHER AMOUNTS  
POSSIBLE. PRECIPITATION WILL END NORTH TO SOUTH WEDNESDAY.  
 
COOLER AND DRIER WEATHER WILL MOVE IN BEHIND THIS SYSTEM AS THE  
PATTERN SHIFTS BACK TO MORE OF A NORTHWEST FLOW REGIME. A  
SHORTWAVE TROUGH MOVING THROUGH THE FLOW WILL BRING INCREASING  
CHANCES FOR SHOWERS AND THUNDERSTORMS LATE IN THE WEEK AND INTO  
THE WEEKEND.  
 

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

 
 

 
 
SHORT TERM...10  
 
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