Wind Advisory 5, NWS Pocatello, ID

000 
WWUS75 KPIH 012108
NPWPIH

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE POCATELLO ID
208 PM MST SAT MAR 1 2008

IDZ020-020300-
/O.EXA.KPIH.WI.Y.0005.000000T0000Z-080302T0300Z/
UPPER SNAKE RIVER PLAIN-
INCLUDING THE CITIES OF...IDAHO FALLS...REXBURG...RIGBY
208 PM MST SAT MAR 1 2008

...WIND ADVISORY IN EFFECT UNTIL 8 PM MST THIS EVENING...

THE NATIONAL WEATHER SERVICE IN POCATELLO HAS ISSUED A WIND
ADVISORY...WHICH IS IN EFFECT UNTIL 8 PM MST THIS EVENING. 

STRONG SOUTHWEST WINDS OF 25 TO 35 MPH WITH GUSTS TO 45 MPH WILL
CONTINUE ACROSS THE ARCO DESERT UNTIL 8 PM THIS EVENING BEFORE
DISSIPATING.

A WIND ADVISORY MEANS THAT WINDS GREATER THAN 30 MPH ARE
EXPECTED. WINDS THIS STRONG CAN MAKE DRIVING DIFFICULT...
ESPECIALLY FOR HIGH PROFILE VEHICLES. USE EXTRA CAUTION.

$$

IDZ017-021-020300-
/O.CON.KPIH.WI.Y.0005.000000T0000Z-080302T0300Z/
EASTERN MAGIC VALLEY-LOWER SNAKE RIVER PLAIN-
INCLUDING THE CITIES OF...BURLEY...RUPERT...SHOSHONE...CAREY...
POCATELLO...BLACKFOOT...FORT HALL...AMERICAN FALLS
208 PM MST SAT MAR 1 2008

...WIND ADVISORY REMAINS IN EFFECT UNTIL 8 PM MST THIS EVENING...

A WIND ADVISORY REMAINS IN EFFECT UNTIL 8 PM MST THIS EVENING. 

STRONG WEST TO SOUTHWEST WINDS OF 25 TO 35 MPH WITH GUSTS TO 45
MPH WILL CONTINUE ACROSS THE EASTERN MAGIC VALLEY AND LOWER SNAKE
PLAIN UNTIL 8 PM THIS EVENING BEFORE DISSIPATING.

A WIND ADVISORY MEANS THAT WINDS GREATER THAN 30 MPH ARE
EXPECTED. WINDS THIS STRONG CAN MAKE DRIVING DIFFICULT...
ESPECIALLY FOR HIGH PROFILE VEHICLES. USE EXTRA CAUTION.

$$

000 
WWUS75 KPIH 020248
NPWPIH

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE POCATELLO ID
748 PM MST SAT MAR 1 2008


IDZ017-020-021-020400-
/O.EXP.KPIH.WI.Y.0005.000000T0000Z-080302T0300Z/
EASTERN MAGIC VALLEY-UPPER SNAKE RIVER PLAIN-
LOWER SNAKE RIVER PLAIN-
INCLUDING THE CITIES OF...BURLEY...RUPERT...SHOSHONE...CAREY...
IDAHO FALLS...REXBURG...RIGBY...POCATELLO...BLACKFOOT...
FORT HALL...AMERICAN FALLS
748 PM MST SAT MAR 1 2008

...WIND ADVISORY WILL EXPIRE AT 8 PM MST THIS EVENING...

THE WIND ADVISORY WILL EXPIRE AT 8 PM MST THIS EVENING. WIND
SPEEDS HAVE DECREASED THIS EVENING AND THIS TREND IS EXPECTED TO
CONTINUE THROUGH THE NIGHT.


$$

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE POCATELLO ID
911 PM MST FRI FEB 29 2008

.UPDATE...

HIGH LEVEL MOISTURE AHEAD OF THE NEXT STORM SYSTEM IS BEGINNING TO
MOVE INTO THE REGION FROM THE WEST. THESE CLOUDS ARE EXPECTED TO
REDUCE THE AREAL COVERAGE OF THE FOG THAT DEVELOPS TONIGHT BY
KEEPING TEMPS SLIGHTLY WARMER THAN LAST NIGHT. MADE MINOR
ADJUSTMENTS TO MIN TEMPS.

VALLE

&&

.PREV DISCUSSION... /ISSUED 223 PM MST FRI FEB 29 2008/

SHORT TERM...TONIGHT THROUGH SUN NIGHT. ACTIVE PACIFIC TROUGH
MOVING EAST WITH ENERGY ALREADY PUSHING INTO THE PACNW PER WV/IR
SAT IMAGERY. COULD SEE RETURN OF PATCHY FOG THIS EVENING THROUGH
SNAKE VALLEY...BUT WIDESPREAD DENSE FOG NOT A CONCERN AT THIS TIME
GIVEN ADDITIONAL MIXING HEAD OF SYSTEM. TIMING OF PRECIP INTO
CENTRAL MTNS STILL LOOKS TO BE AFTER MIDNIGHT...SPREADING RAPIDLY
ACROSS FCST AREA DURING THE DAY SATURDAY. FRONTAL PASSAGE THROUGH
KPIH ROUGHLY 18Z. SNOW LEVELS AHEAD OF FRONT IN THE 6000-6500FT
RANGE...DROPPING TO ROUGHLY 5000FT BEHIND FRONT. INSTABILITY
ALONG/BEHIND FRONT SUPPORTS MENTION OF ISOLD THUNDER ALONG WITH
LIKELY OR BETTER SHOWERS. SNOW LEVELS DROP BACK TO VALLEY FLOORS
SAT NIGHT BUT PRECIP TRANSITIONS TO HIGHER ELEVATIONS ONLY MAINLY
IN EASTERN HIGHLANDS. NORTHWEST FLOW SETS IN SUN AND SUN NIGHT
AS SFC HIGH AND UPPER RIDGE SETTLE IN. COULD SEE A RETURN TO SFC-
BASED INVERSIONS AND STRATUS/FOG IN THE VALLEYS. DMH

LONG TERM...MON THROUGH NEXT FRI NIGHT.  500MB LONGWAVE PROG HAS
VERY LITTLE CHANGE THROUGH THIS PERIOD.  TRACKING THE 5580M
GEOPOTENTIAL SHOWS THAT IT NEVER WANDERS FAR FROM SOUTHERN IDAHO.
LONGWAVE RIDGE ALONG 130W STARTS TO MOVE TO THE WEST COAST ON
THU...WHICH PUSHES UP 500MB HEIGHTS AND BRINGS A POSSIBLE WARMING
TREND AT THE END OF THE PERIOD...BUT OTHERWISE THE NEARLY CONTINUOUS
NORTH NORTHWESTERLY FLOW SHOULD MEAN BELOW NORMAL TEMPERATURES BUT
DRY CONDITIONS EXCEPT ALONG THE WEST AND NORTHWEST FACING SLOPES OF
THE EASTERN HIGHLANDS AND IN THE CENTRAL IDAHO MOUNTAINS.  NO MAJOR
PRECIPITATION ACCUMULATIONS WOULD BE EXPECTED FROM SUCH MEAN FLOW.
LOOKING AT THE DETAILS DOES SHOW ONE SIGNIFICANT SHORTWAVE MOVING
QUICKLY THROUGH MON NIGHT/TUE.  ECMWF AND GFS IN GOOD AGREEMENT ON
THIS FEATURE.  ECMWF STILL FAVORS A STRONGER BLOCKING PATTERN AFTER
TUE NIGHT...SO WILL BIAS DRIER THAN GFSX MOS GUIDANCE FOR POP.
GUIDANCE TEMPERATURES ARE BELOW NORMAL FOR BOTH LOWS AND HIGHS AS
EXPECTED.  THE STRONG UPPER LEVEL FLOW FROM THE NORTHWEST IS NOT
EXACTLY THE BEST DIRECTION FOR WIND EVENTS...BUT THE ENERGY IS
AVAILABLE ALOFT IF IT CAN BE MIXED DOWN.  CERTAINLY WITH THE MON
NIGHT/TUE SHORTWAVE THAT IS POSSIBLE.  AT THIS TIME...ONLY BREEZY
CONDITIONS ARE IN FORECAST.  MESSICK

AVIATION...LAST MORNING TO STRUGGLE WITH VERY LOW STRATUS AND DENSE
FOG...AT LEAST FOR NOW.  INCREASING WIND AT TOP OF BOUNDARY LAYER
AHEAD OF THE INCOMING FRONT...PLUS MORE CLOUDINESS ALOFT SHOULD KEEP
THE DENSE FOG AND LOW STRATUS AWAY.  FRONT ARRIVES DURING MID-DAY
HOURS IN THE KPIH AREA...SO RA/SN SHOULD START AT KSUN AND KBYI
PRIOR TO 18Z AND IS REFLECTED IN THE TAFS CURRENTLY.  SHOWERS
VICINITY REMARKS IN THE EASTERN TAFS KIDA AND KPIH.  MESSICK

&&

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

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE POCATELLO ID
503 AM MST FRI FEB 29 2008

IDZ017>025-031-032-011215-
EASTERN MAGIC VALLEY-SAWTOOTH MOUNTAINS-UPPER SNAKE HIGHLANDS-
UPPER SNAKE RIVER PLAIN-LOWER SNAKE RIVER PLAIN-
SOUTH CENTRAL HIGHLANDS-CARIBOU HIGHLANDS-
CACHE VALLEY/IDAHO PORTION-WASATCH MOUNTAINS/IDAHO PORTION-
BIG AND LITTLE WOOD RIVER REGION-LOST RIVER/PAHSIMEROI-
503 AM MST FRI FEB 29 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN IDAHO.

.DAY ONE...TODAY AND TONIGHT

DENSE FOG IN THE MIDDLE AND UPPER SNAKE VALLEY AND SURROUNDING
FOOTHILLS WILL CREATE HAZARDOUS TRAVEL CONDITIONS THIS MORNING.
THE FOG WILL DISSIPATE ABOUT MIDDAY BUT REFORM TONIGHT IN AREAS
FROM IDAHO FALLS NORTHWARD.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

AN UPPER LEVEL TROUGH AND ASSOCIATED COLD FRONT WILL ARRIVE IN
CENTRAL AND EASTERN IDAHO ON SATURDAY MORNING BRINGING LIGHT RAIN
AND RAIN/SNOW MIX TO VALLEY LOCATIONS AND LIGHT SNOW TO THE
MOUNTAINS. THIS SYSTEM WILL MOVE INTO WYOMING ON SUNDAY WITH JUST
A FEW RESIDUAL SNOWSHOWERS EXPECTED IN THE EASTERN HIGHLANDS. HIGH
PRESSURE RETURNS ON MONDAY WITH ANOTHER ROUND OF DENSE FOG
POSSIBLE FOR AREAS FROM IDAHO FALLS NORTHWARD. A WEAK UPPER LEVEL
SYSTEM WILL SKIRT THE CONTINENTAL DIVIDE AND EASTERN HIGHLANDS ON
TUESDAY WITH SCATTERED LIGHT SNOWSHOWERS BUT THE REST OF SOUTHEAST
IDAHO SHOULD REMAIN DRY THROUGH THURSDAY.

.SPOTTER INFORMATION STATEMENT...

WE ASK TRAINED SPOTTERS AND CITIZENS TO REPORT SIGNIFICANT
WEATHER CONDITIONS WHEN IT IS SAFE TO DO SO. THESE CONDITIONS MAY
INCLUDE HAIL...TORNADOES...STRONG WIND...DUST STORMS...SNOWFALL...
EXTREME COLD TEMPERATURES...FREEZING RAIN OR HEAVY RAIN...DENSE
FOG...AND FLOODING OR ICE JAMS. INFORMATION ABOUT THESE HAZARDOUS
CONDITIONS SHOULD BE CALLED INTO YOUR NATIONAL WEATHER SERVICE
OFFICE IN POCATELLO USING THE 1-800 SEVERE WEATHER HOTLINE...OR
208-233-0834.