FXUS65 KPIH 102021
AFDPIH

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE POCATELLO ID
121 PM MST THU DEC 10 2009

.SHORT TERM...TONIGHT THROUGH SATURDAY NIGHT.

RIDGE OF HIGH PRESSURE HAS MOVED OVER THE REGION TODAY. THIS HAS
BROUGHT CLEAR SKIES TO THE AREA ALONG WITH EXTREMELY COLD
TEMPERATURES. SUBZERO TEMPERATURES WERE COMMON THIS MORNING WITH
MANY LOCATIONS IN THE -10 TO -20 RANGE. VERY SIMILAR CONDITIONS
ARE ONCE AGAIN EXPECTED TONIGHT. ONLY CONCERN MAY BE IF SOME LOW
STRATUS OR FOG DEVELOPS IN THE SNAKE PLAIN...WHICH WOULD KEEP
TEMPS WARMER. THERE WAS SOME STRATUS AROUND THIS MORNING...BUT IT
WAS IN THE VERY NORTHWEST CORNER OF THE SNAKE PLAIN. SO...AM NOT
BETTING ON IT TONIGHT.

SLIGHTLY WARMER WEATHER ARRIVES ON FRIDAY AS THE HIGH BEGINS TO
MOVE EAST. HIGH TEMPS WILL BE IN THE MID TEENS TO NEAR 20 IN MANY
LOCATIONS. A WARM FRONT WILL APPROACH THE AREA FRIDAY NIGHT. THIS
FRONT IS PART OF A MUCH LARGER SYSTEM THAT WILL BE COMING ONTO THE
NORTHERN CALIFORNIA COAST OVER THE WEEKEND. NOTICEABLY WARMER
TEMPERATURES WILL ACCOMPANY THE FRONT AS IT PASSES THROUGH. HIGH
TEMPS ON SATURDAY WILL BE IN THE UPPER 20S TO LOWER 30S.
HOWEVER...SNOW SHOWERS WILL DEVELOP FRIDAY NIGHT AS THE WARM
FRONT MOVES THROUGH THE AREA. THESE SHOWERS ARE EXPECTED TO
CONTINUE THROUGH SATURDAY AND SATURDAY NIGHT AND BECOME MORE
WIDESPREAD AS MOISTURE STREAMS THROUGH THE REGION FROM CALIFORNIA.
ALTHOUGH...EXACT AMOUNTS ARE STILL UNKNOWN...THERE IS THE
POTENTIAL FOR SEVERAL INCHES OF SNOW TO FALL OVER THE
WEEKEND...EVEN DOWN TO THE VALLEY FLOORS.

.LONG TERM...SUNDAY THROUGH THURSDAY.
PACIFIC TROF MOVES THROUGH SOUTHEAST IDAHO SUNDAY AND EXPECT LIGHT 
SNOW TO BE WIDESPREAD THROUGH SUNDAY NIGHT ESPECIALLY IN THE FAR 
EAST.  BOTH GFS AND EUROPEAN MODELS SUPPORT THIS SCENARIO.  PACIFIC 
MOISTURE EXPECTED TO CONTINUE TO PUSH INTO REGION WITH ANOTHER WEAK 
SHORT WAVE TUESDAY INTO WEDNESDAY.  KEPT IN CHANCES OF PRECIPITATION 
THROUGH THE PERIOD ALTHOUGH DO NOT EXPECT HEAVY AMOUNTS THROUGH NEXT 
WEEK.  THE MOST SIGNIFICANT PRECIPITATION WILL LIKELY COME OVER THE 
WEEKEND.  OVERALL A PROGRESSIVE PATTERN WITH INTERMITTENT TROF/RIDGE 
SHORT WAVE PATTERN SO TIMING OF ANY PRECIPITATION VERY DIFFICULT.  
GENERALLY EXPECT NEAR SEASONAL TEMPERATURES IN THE LONG TERM AS THE 
VERY COLD PATTERN WILL ERODE OVER THE WEEKEND.
GK

&&

.AVIATION...CLEAR SKIES AND VFR CONDITIONS ARE NOTED ACROSS MOST OF 
THE REGION THIS AFTERNOON AND SHOULD CONTINUE INTO TONIGHT FOR MOST 
LOCATIONS. HIGH RESOLUTION MODELS DO INDICATE SOME PATCHY STRATUS 
AND FOG POSSIBLY MAKING A RETURN TO THE UPPER SNAKE RIVER VALLEY 
AFTER 07Z TONIGHT. ANY STRATUS OR FOG SHOULD ERODE DURING THE MID 
MORNING HOURS ON FRIDAY. HATTINGS

&&

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

$$