720  
FXUS65 KBOI 190243  
AFDBOI  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE BOISE ID  
843 PM MDT WED SEP 18 2019  
   
DISCUSSION
 
SCATTERED SHOWERS CONTINUE THROUGHOUT OUR CWA  
THIS EVENING. ISOLATED THUNDERSTORMS ALSO IN EASTERN OREGON  
CLOSER TO THE UPPER LOW CENTERED OVER THE CASCADES. SHOWERS  
SHOULD INCREASE ON THE IDAHO SIDE LATER TONIGHT AND THURSDAY  
AS THE LOW MOVES INTO OUR CWA. CLEARING WEST TO EAST THURSDAY  
NIGHT AND FRIDAY MORNING AS THE LOW EXITS EAST. CONTINUED COOL.  
CURRENT FORECAST IS ON TRACK. NO UPDATES.  
 

 
   
AVIATION
 
SCATTERED SHOWERS ACROSS HIGHER ELEVATIONS  
DISSIPATING THIS EVENING WITH SHOWERS PERSISTING OVER THE MAGIC  
VALLEY THROUGH THE MORNING. PERIODS OF MVFR/IFR OVERNIGHT IN LOW  
CEILINGS AND LOCALIZED FOG. MOUNTAINS OBSCURED. SNOW LEVEL: 7500-  
8500 FT MSL. SURFACE WINDS: GENERALLY W TO NW 10 KTS OR LESS. WINDS  
ALOFT TO 10K FEET MSL: SOUTHWEST 10-20 KT BECOMING VARIABLE 5-10 KT  
BY 19/09Z.  
 

 
   
PREV DISCUSSION
 
 
SHORT TERM...TONIGHT THROUGH FRIDAY...WIDESPREAD RAIN AND  
ISOLATED THUNDERSTORMS WILL CONTINUE ACROSS MUCH OF THE REGION  
THIS EVENING. SOME OF THE STRONGER CELLS HAVE PRODUCED BRIEF HEAVY  
RAIN. SOME SPOTS IN THE MOUNTAINS COULD SEE NEAR AN INCH OF RAIN  
TOTAL THOUGH MOST AREAS WILL SEE ABOUT 0.25 TO 0.50 INCHES THROUGH  
THURSDAY. AS THE LOW MOVES OVER THE FORECAST AREA LATE TONIGHT,  
ANOTHER PRECIPITATION BAND DEVELOPS OVER THE BOISE MOUNTAINS AND  
WESTERN MAGIC VALLEY BRINGING PERIODS OF MODERATE RAINFALL. THE  
BAND LIFTS NORTHEAST THURSDAY MORNING WITH MORE CONVECTIVE SHOWERS  
AND THUNDERSTORMS DEVELOPING THURSDAY AFTERNOON. THE BEST CHANCE  
FOR PRECIPITATION WILL BE ALONG THE NEVADA BORDER AND IN THE WEST  
CENTRAL AND BOISE MOUNTAINS. DRY CONDITIONS FOLLOW FOR FRIDAY  
UNDER COOL NORTHWESTERLY FLOW. TEMPERATURES WILL REMAIN WELL BELOW  
NORMAL THROUGH THE PERIOD.  
 
LONG TERM...FRIDAY NIGHT THROUGH MONDAY...A WEAK RIDGE WILL MOVE  
ACROSS THE REGION ON SATURDAY BRINGING MOSTLY SUNNY SKIES AND  
SEASONABLE TEMPERATURES. ANOTHER TROUGH, VERY SIMILAR TO TODAY'S  
WILL MOVE ACROSS THE REGION ON SUNDAY NIGHT. EXPECT SHOWERS  
SUNDAY NIGHT INTO MONDAY. CONDITIONS WILL CLEAR OUT ON MONDAY  
AFTERNOON. TEMPERATURES WILL BE COOL AS THE SYSTEM MOVES THROUGH  
BUT QUICKLY REBOUND AS CONDITIONS DRY OUT.  
 
MONDAY NIGHT THROUGH WEDNESDAY...CLEAR TO PARTLY CLOUDY SKIES ACROSS  
MOST OF THE REGION AS DRIER, MORE STABLE RIDGING MOVES IN AND  
DOMINATES. LOOK FOR BREEZIER NORTHWEST WINDS UNTIL TUESDAY NIGHT,  
BECOMING LIGHTER AND SWITCHING TO WESTERLY AFTERWARDS. EXPECT  
HIGHS AND LOWS TO REGISTER NEAR THE NORMAL RANGES.  
 

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

 
 

 
 
WWW.WEATHER.GOV/BOISE  
WWW.FACEBOOK.COM/NWSBOISE  
WWW.TWITTER.COM/NWSBOISE  
 
DISCUSSION...LC  
AVIATION.....AL  
PREV SHORT TERM...JDS  
PREV LONG TERM....KA/WH  
 
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