Area Forecast Discussion
Issued by NWS Boise, ID

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FXUS65 KBOI 290955
AFDBOI

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
255 AM MST THU JAN 29 2015

.SHORT TERM...TODAY THROUGH FRIDAY...UPPER LEVEL RIDGE WILL
DOMINATE THE SHORT TERM ALTHOUGH A PORTION OF AN UPPER TROUGH WILL
CROSS OREGON INTO NV LATER TODAY AND SHIFT FARTHER SOUTH /TO
SOCAL/ FRIDAY. SO INVERTED TEMPERATURE PROFILE...VALLEY FOG AND
STRATUS FROM AROUND MIDNIGHT THROUGH NOON...ARE EXPECTED TO
CONTINUE. TEMPERATURES WILL BE AVERAGE ABOVE NORMAL IN THE VALLEYS
AND MUCH ABOVE NORMAL IN THE MOUNTAINS.

.LONG TERM...FRIDAY NIGHT THROUGH THURSDAY. WITH A CUT OFF UPPER
LOW OVER THE DESERT SOUTHWEST AND A RIDGE OFF OF THE PACIFIC
COAST...THE AREA WILL BE UNDER A SPLIT FLOW PATTERN THEN A
NORTHWEST FLOW THROUGH SATURDAY. DRY CONDITIONS ARE EXPECTED
DURING THIS TIME. ON SUNDAY THE RIDGE IS EXPECTED TO FLATTEN OUT
AND TRANSITION THE AREA INTO A MORE ZONAL FLOW...WITH SHORTWAVES
EMBEDDED. BOTH THE GFS AND ECMWF ARE SHOWING ONE OF THESE
SHORTWAVES BRINGING PRECIP TO THE AREA ON MONDAY WITH SNOW LEVELS
NEAR 5000-6000FT. THE RIDGE OFF OF THE COAST WILL ONCE AGAIN
AMPLIFY ON TUESDAY AND BEYOND. BOTH MODELS ARE SHOWING SOME
LINGERING MOISTURE FLOWING OVER THE RIDGE AND POTENTIALLY BRINGING
PRECIP TO THE CENTRAL MOUNTAINS...BUT TIMING IS STILL UNCERTAIN.
FORECAST IS LARGELY UNCHANGED FROM PREVIOUS. TEMPERATURES ARE
EXPECTED TO REMAIN AT OR ABOVE NORMAL THROUGH THE PERIOD.

&&

.AVIATION...AREAS OF IFR/MVFR FOG/STRATUS WILL CONTINUE THROUGH MID
MORNING IN VALLEY LOCATIONS...THEN MOST AREAS WILL RETURN TO VFR.
OTHER LOCATIONS VFR THROUGH THE PERIOD. ANOTHER ROUND OF VALLEY
FOG/STRATUS IS POSSIBLE AFTER 30/03Z. SURFACE WINDS GENERALLY 10KTS
OR LESS...WITH MAGIC VALLEY AT 15 KTS OR LESS. WINDS ALOFT NEAR 10K
FT MSL...SOUTH AT 5-10KTS...THEN AFTER 30/06Z NORTHEAST AT
5-10KTS.

&&

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

&&

$$

WEATHER.GOV/BOISE

SHORT TERM...VM
LONG TERM....EP
AVIATION.....EP
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