792  
FXUS64 KLCH 072116  
AFDLCH  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE LAKE CHARLES LA  
416 PM CDT TUE JUL 7 2020  
   
DISCUSSION
 
 
PERIOD OF ENHANCED AREAWIDE RAIN CHANCES IS COMING TO AN END,  
WITH HEAT AND HUMIDITY ON THE HORIZON.  
 
PERSISTENT UPPER TROF AXIS AND DEEP MSTR POOL THAT HAS PLAGUED THE  
AREA WITH ABUNDANT RAINFALL THE PAST SEVERAL DAYS WILL BE  
DEPARTING THE AREA TONIGHT AND INTO TOMORROW, AS A SHORTWAVE TROF  
OVER THE ARKLATEX TRANSLATES EWD AND RIDGING OVER THE SE GULF  
EXPANDS TWD THE W/NW. ENOUGH OF A WEAKNESS AND LINGERING DEEP MSTR  
WILL RESIDE OVER AREAS MAINLY ALONG AND N OF HWY 190 TO ALLOW FOR  
THE POSSIBILITY OF SCATTERED CONVECTION TOMORROW, BUT OTHERWISE  
THE EXPANDING RIDGE AND ARRIVAL OF RELATIVELY DRIER AIR WILL BEGIN  
TO SUPPRESS RAIN CHANCES AND RESULT IN WARMING AFTERNOON  
TEMPERATURES. READINGS TOMORROW ARE STILL EXPECTED TO BE NEAR OR  
JUST A LITTLE BELOW SEASONAL NORMALS, BUT A STEADY WARMING TREND  
IS EXPECTED THU AND FRI AS THE RIDGE OVER THE NW GULF MERGES WITH  
AN EXPANDING RIDGE SE OF THE FOUR CORNERS.  
 
THIS RIDGE WILL BECOME QUITE ROBUST ON FRI, WITH AN AXIS  
EXTENDING ESE INTO THE NW GULF, AND WILL REMAIN QUASI-STATIONARY  
THROUGH THE WEEKEND INTO EARLY NEXT WEEK. WHILE THE EASTERN EXTENT  
OF THE RIDGE WILL WAX AND WANE A BIT OWING TO SHORTWAVE ENERGY  
ROUNDING ITS EASTERN FLANK INTO AN ERN CONUS TROF, GLOBAL MODELS  
HAVE CONTINUED TO TREND BOTH DRIER AND WARMER, WITH ONLY VERY  
SLIGHT RAIN CHANCES RETURNING TO PARTS OF SC LA SAT THROUGH TUE.  
THE BIGGER STORY WILL BE THE HEAT AND HUMIDITY, AS A STEADY S/SW  
SFC FLOW KEEPS ELEVATED DEWPOINTS IN PLACE AMID DAYTIME  
TEMPERATURES CLIMBING INTO THE MID/UPPER 90S. PEAK HEAT INDEX  
VALUES (APPARENT TEMPERATURES) ARE EXPECTED TO REACH TO AROUND 105  
ON FRI, AND INTO THE 105 TO 110 DEGREE RANGE OVER THE WEEKEND  
INTO EARLY NEXT WEEK. TOO EARLY TO SAY FOR SURE WHETHER VALUES  
WILL EXCEED OUR 108 DEGREE HEAT ADVISORY THRESHOLD, BUT AT SOME  
POINT OVER THE WEEKEND, WE MAY LOOK BACK WITH FONDNESS AT THE  
RECENT PERIOD OF CLOUDY/WETTER/COOLER WEATHER.  
 
13  
 

 
   
MARINE
 
 
SURFACE HIGH PRESSURE STRETCHING WEST ACROSS THE FLORIDA  
PENINSULA INTO THE CENTRAL GULF WILL RESULT IN LIGHT TO AT TIMES  
MODEST SOUTH TO SOUTHWEST WINDS THROUGH THE WEEK AND INTO THE  
WEEKEND. MOSTLY DRY WEATHER IS EXPECTED, ESPECIALLY BY THURSDAY  
AND THROUGH THE WEEKEND, AS HIGH PRESSURE ALOFT PREVAILS.  
 
13  
 

 
   
PRELIMINARY POINT TEMPS/POPS
 
 
AEX 73 90 74 93 / 30 40 10 10  
LCH 78 89 77 91 / 10 10 0 10  
LFT 77 91 76 92 / 10 20 0 10  
BPT 79 90 79 91 / 10 10 0 10  
 

 
   
LCH WATCHES/WARNINGS/ADVISORIES
 
 
LA...NONE.  
TX...NONE.  
GM...NONE.  
 

 
 

 
 
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