Area Forecast Discussion
Issued by NWS Pocatello, ID

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000
FXUS65 KPIH 030910
AFDPIH

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE POCATELLO ID
310 AM MDT THU SEP 3 2015

.SHORT TERM...TODAY THROUGH SUNDAY. THE DOMINANT FEATURE WILL BE
THE DEEP UPPER LOW CURRENTLY OVER BRITISH COLUMBIA. THIS SYSTEM IS
STRENGTHENING THE SW FLOW ALOFT...PULLING IN SUBTROPICAL MOISTURE
INTO SE ID. THIS IS RESPONSIBLE FOR THE ISOLD TSTMS IN THE EASTERN
HIGHLANDS THIS MORNING. PRECIP WITH THE UPPER LOW WILL MOVE INTO
THE CENTRAL MTNS TODAY...AND INTO THE EASTERN HIGHLANDS THIS EVE.
BY FRI EVE...THE UPPER LOW DEEPENS AND MOVES INTO SW OR. SHOWERS
AND ISOLD TSTMS WILL BECOME MORE WIDESPREAD OVER THE MTNS THRU SAT
MORN. AS THE UPPER LOW MOVES INTO ID ON SATURDAY...SCATTERED
SHOWERS/ISOLD TSTMS WILL IMPACT MOST AREAS BY AFTN AND CONTINUING
INTO THE EVE. TEMPS WILL BE MUCH COOLER ON SAT...AND THE HIGHER
ELEVATIONS IN THE CENTRAL MTNS MAY SEE SOME SNOW. THE UPPER LOW
FILLS AND MOVES INTO MT BY SUN MORN...WITH THE PRECIP SHIFTING TO
THE NORTHERN PARTS OF THE FCST AREA. PRECIP IS OUT OF THE AREA SUN
NIGHT.

.LONG TERM...MONDAY THROUGH THURSDAY. BOTH GFS AND ECMWF DROP
ANOTHER TROF INTO THE PAC NW ON MON. NOT MUCH MOISTURE WITH THIS
SYSTEM...SO ONLY EXPECTING ISOLD SHOWERS NEAR THE DIVIDE MON AFTN
AND NIGHT. FROM TUE THRU THU...NW FLOW IS EXPECTED TO KEEP THE
FCST AREA DRY. TEMPS WILL GRADUALLY CLIMB BACK UP DURING THE WEEK.
HEDGES

&&

.AVIATION...SHOWERS PUSHING EAST IF PIH AND IDA AT 3 AM AND
EXPECT VFR CONDITIONS TODAY.  EXPECT SOME AFTERNOON AND
EVENING SHOWER AND THUNDERSTORM AGAIN MAINLY AT BYI...PIH AND
IDA.  FOR NOW HAVE JUST VICINITY IN TAFS BUT ALL COULD SEE
ACTIVITY LATER TODAY AND TONIGHT.  EXPECT 10 TO 15 KNOT
SUSTAINED WINDS AT BYI...PIH AND BYI WITH GUSTS IN THE 20 TO
30 KNOT RANGE.
GK

&&

.FIRE WEATHER...EXPECT HIGHER HUMIDITY TODAY WITH WINDS NOT AS
STRONG AS YESTERDAY.  HUMIDITY SHOULD BE ABOVE 15 PERCENT
WIDESPREAD TODAY.  WINDS GUSTS EXPECTED MAINLY IN THE 20 TO 30
MPH RANGE.   SYSTEM OVER THE WEEKEND NOT LOOKING AS WET RIGHT NOW
BUT STILL EXPECT WETTING RAINS MAINLY IN ZONES 422...475 AND 476
FRIDAY THROUGH SUNDAY.
GK

&&

.PIH WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

$$


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