AREA FORECAST DISCUSSION

 
 FXUS65 KBOI 222202
 AFDBOI
 
 AREA FORECAST DISCUSSION
 NATIONAL WEATHER SERVICE BOISE ID
 302 PM MST SUN NOV 22 2009
 
 .SHORT TERM...TONIGHT THROUGH TUESDAY...SNOW SHOWERS IN CENTRAL
 IDAHO ASSOCIATED WITH AN EXITING UPPER LEVEL TROUGH WILL ALLOW UP
 TO AN ADDITIONAL 2 INCHES ACCUMULATION IN EASTERN VALLEY COUNTY AND
 THE BOISE MOUNTAINS AND UP TO AN INCH OF WET SNOW GRASSY/BARE
 AREAS IN THE WESTERN MAGIC VALLEY...UNTIL AROUND 6 PM. LOCALLY
 GUSTY WEST WINDS TO 35 MPH LOOK TO DIMINISH TO LIGHT EARLY THIS
 EVENING EXCEPT IN THE MAGIC VALLEY WHERE 15-20 MPH SUSTAINED WIND
 ARE EXPECTED TONIGHT. SO PATCHY FOG IS POSSIBLE WHERE WINDS DROP
 OFF. QUICK MOVING STORM WILL LEAVE COOL NW FLOW AND DRYING
 ACROSS THE REGION THROUGH MONDAY NOON RESULTING TEMPERATURES 3-5F
 BELOW NORMAL THOUGH HIGH ELEVATION SHELTERED AREAS /I.E. FAFI1/
 COULD SEE SINGLE DIGIT LOWS THE NEXT COUPLE NIGHTS. A SYSTEM THAT
 BRUSHES PRECIP NORTH OF US IS EXPECTED TO BRING SOME CLOUDS ACROSS
 SE OREGON AND SW IDAHO MONDAY AFTERNOON AND FAR NORTHERN ZONES
 TUESDAY AS A RIDGE/INVERSION BUILDS NORTHWARD INTO THE AREA. COULD
 SEE STRATUS EARLY TUESDAY MORNING IN THE UPPER WEISER ZONE WHERE
 SNOW ACCUMULATED AND INTO THE OREGON LOWER TREASURE VALLEY WHERE
 DIURNAL WINDS TEND TO ACCUMULATE SUCH LOW LEVEL MOISTURE.
 
 .LONG TERM...TUESDAY NIGHT THROUGH SUNDAY...SHORTWAVE RIDGE WILL KEEP 
 INVERSION IN PLACE THROUGH THURSDAY. RESULT WILL BE ABOVE NORMAL 
 TEMPS IN THE MOUNTAINS WITH COLDER AIR TRAPPED IN THE VALLEYS. 
 MODELS HAVE HINT OF A SE WIND IN BOISE WHICH COULD BE ENOUGH TO KEEP 
 FOG/STRATUS OUT OF THE CITY. LOOKS LIKE A BETTER CHANCE IN LOWER 
 TREASURE/WEISER AND BAKER VALLEYS FOR WEDNESDAY AND THURSDAY MORNING 
 WITH LITTLE WIND. WHILE INVERSION REMAINS IN PLACE ON THURSDAY... 
 SURFACE WINDS WILL INCREASE DURING THE DAY HELPING TO SCOUR OUT THE 
 FOG/STRATUS IN MOST LOCATIONS. SHORTWAVE MOVES INTO THE REGION ON 
 FRIDAY BRINGING CHANCE OF SNOW TO THE MTNS AND RAIN TO THE VALLEYS. 
 CONDITIONS DRY OUT FOR SAT/SUN IN N-NW FLOW WITH NEAR NORMAL TEMPS. 
 
 &&
 
 .AVIATION...LOCAL IFR IN THE SW IDAHO MTNS AND MVFR IN THE WESTERN 
 MAGIC VALLEY THIS AFTERNOON WILL GRADUALLY IMPROVE THIS EVENING. 
 ISOLATED IFR IN THE MTNS OVERNIGHT DUE TO LOW CEILINGS...OTHERWISE 
 VFR TONIGHT AND MONDAY. SURFACE WINDS GENERALLY DECREASING TO 10 KTS 
 OR LESS FOR MONDAY. WINDS ALOFT DECREASE TO 20 KTS OR LESS BELOW 10K 
 FEET MSL. 
 
 &&
 
 .BOI WATCHES/WARNINGS/ADVISORIES...
 ID...NONE.
 OR...NONE.
 &&
 
 $$
 
 WEATHER.GOV/BOISE
 
 SHORT TERM...VM
 LONG TERM....DG/DD
 AVIATION.....DG