143  
FXUS65 KBOI 150828  
AFDBOI  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE BOISE ID  
228 AM MDT WED AUG 15 2018  
   
SHORT TERM...TODAY THROUGH THURSDAY
 
NO SIGNIFICANT FORECAST  
CHANGES. MONSOON MOISTURE WILL INCREASE CLOUDS FROM THE SOUTHWEST  
TODAY IN OREGON AND TONIGHT IN IDAHO. MODELS CONTINUE A CHANCE  
OF SHOWERS ALONG THE NEVADA/IDAHO BORDER THIS AFTERNOON WITH JUST  
ENOUGH INSTABILITY FOR A SLIGHT CHANCE OF THUNDERSTORMS. IN EASTERN  
OREGON CLOUDS WILL HOLD MAX TEMPS DOWN SLIGHTLY IN HARNEY COUNTY,  
BUT THE LOW LEVELS OF THE ATMOSPHERE LOOK TOO DRY FOR SHOWERS TO  
REACH THE GROUND. FOR TONIGHT SKIES IN OUR CWA WILL BE PARTLY  
CLOUDY IN THE SOUTH AND MOSTLY CLOUDY IN THE NORTH. THE CLOUDS  
WILL KEEP NIGHTTIME TEMPS WARMER. ON THURSDAY A PACIFIC TROUGH  
WILL REACH THE COAST FOR A SLIGHT CHANCE OF SHOWERS AND AFTERNOON  
THUNDERSTORMS IN THE MOUNTAINS ON THE IDAHO SIDE AND MOUNTAINS  
OF BAKER COUNTY ON THE OREGON SIDE. HIGH TEMPS FRIDAY WILL  
CHANGE LITTLE FROM TODAY. NO SIGNIFICANT WINDS THROUGH THURSDAY  
EXCEPT NEAR THUNDERSTORMS.  
   
LONG TERM...THURSDAY NIGHT THROUGH WEDNESDAY
 
A WEAK UPPER LEVEL  
TROUGH APPROACHING FROM THE COAST THURSDAY NIGHT AND CROSSING OUR  
AREA FRIDAY AND FRIDAY NIGHT WILL INTERACT WITH MONSOON MOISTURE TO  
TRIGGER ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS, MAINLY OVER  
THE MOUNTAINS OF CENTRAL IDAHO AND BAKER COUNTY, OREGON. MODELS SHOW  
THE BEST CHANCE OF THUNDERSTORMS FRIDAY AFTERNOON AND EVENING,  
CORRESPONDING TO MAXIMUM INSTABILITY. DRIER MORE STABLE AIR MOVES  
INTO EASTERN OREGON LATE FRIDAY NIGHT AS THE TROUGH BEGINS TO EXIT.  
ON SATURDAY SHOWERS ARE EXPECTED TO BE CONFINED TO THE WEST CENTRAL  
IDAHO MOUNTAINS. SKIES WILL BE MOSTLY CLEAR SATURDAY NIGHT AND  
SUNDAY. MODELS AGREE ON BRINGING ANOTHER WEAK UPPER LEVEL TROUGH  
OVER OUR AREA FROM THE NORTHWEST SUNDAY NIGHT AND MONDAY, BUT WITH  
MONSOON MOISTURE CUT OFF, THERE WILL BE NO MORE THAN A SLIGHT CHANCE  
OF SHOWERS OVER THE CENTRAL IDAHO MOUNTAINS. TEMPERATURES WILL BE  
NEAR NORMAL FRIDAY AND SATURDAY, THEN WARM TO AROUND 5 DEGREES ABOVE  
NORMAL TUESDAY AND WEDNESDAY AS THE UPPER LEVEL RIDGE OVER THE  
DESERT SOUTHWEST EXPANDS NORTHWARD.  
 

 
   
AVIATION
 
MAINLY VFR. SMOKE LAYERS WITH LOCAL MVFR DUE TO WILDFIRE  
SMOKE. ISOLATED AFTERNOON AND EVENING THUNDERSTORMS ALONG THE IDAHO-  
NEVADA BORDER. SURFACE WINDS VARIABLE 10 KTS OR LESS. WINDS ALOFT  
NEAR 10K FEET MSL SOUTH TO WEST AROUND 10 KTS.  
 

 
   
BOI WATCHES/WARNINGS/ADVISORIES
 
 
ID...NONE.  
OR...NONE.  
 

 
 

 
 
WWW.WEATHER.GOV/BOISE  
WWW.FACEBOOK.COM/NWSBOISE  
WWW.TWITTER.COM/NWSBOISE  
 
SHORT TERM...LC  
LONG TERM....JT  
AVIATION.....JC  
 
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