Special Weather Statement, NWS Pocatello, ID

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE POCATELLO ID
1005 PM MDT THU OCT 25 2012

.UPDATE...PATCHY FREEZING FOG IN AREAS OF LIGHT SNOW DEVELOPING
THIS EVENING AROUND DRIGGS...SAINT ANTHONY...INTERSTATE 15
BETWEEN BLACKFOOT AND IDAHO FALLS AND SOME VALLEY ARAS IN THE
EASTERN HIGHLANDS. MUCH OF THIS SHOULD BE ASSOCIATED WITH
PRECIPITATION AND ENDING AS THE SHOWERS MOVE THROUGH THE EASTERN
HIGHLANDS PAST MIDNIGHT. RS

&&

.PREV DISCUSSION... /ISSUED 149 PM MDT THU OCT 25 2012/

SHORT TERM...TONIGHT THRU SUNDAY. THE LONG PERSISTENT UPPER LOW
HAS OPENED UP INTO A BROAD UPPER TROF WHICH DOMINATES MUCH OF THE
WEST. MINOR WAVES MOVING THRU THE TROF CONTINUE TO SET OFF SNOW
SHOWERS OVER ALL BUT THE SW PARTS OF THE FCST AREA. SNOW SHOWERS
ARE EXPECTED TO DIMINISH THIS EVENING WHEN THE AIRMASS STABILIZES
..WITH ONLY ISOLD COVERAGE OVERNIGHT IN THE EASTERN HIGHLANDS.
THE UPPER TROF MOVES OFF TO THE EAST BY FRI...BUT ANOTHER MINOR
WAVE MOVES THRU THE NW FLOW INTO ID BY FRI AFTN. THIS WILL SPREAD
SNOW SHOWERS ACROSS THE NORTHERN AND EASTERN PARTS OF THE FCST
AREA LATE FRI AFTN AND NIGHT. ANOTHER WAVE IN THE NW FLOW MOVES
INTO THE AREA EARLY SUN MORN FOR MORE SNOW SHOWERS THRU THE AFTN.
SNOWFALL AMTS FRI NIGHT AND SAT MAY REACH 2 TO 4 INCHES IN THE
CENTRAL MTNS AND NE HIGHLANDS...WITH ONLY MINIMAL ACCUMULATIONS
ELSEWHERE.

TEMPS WILL BEGIN TO RISE OVER THE WEEKEND AS THE UPPER RIDGE OVER
THE EASTERN PAC BEGINS TO DOMINATE THE WEST. HEDGES

LONG TERM...SUNDAY NIGHT THROUGH THURSDAY.
GENERALLY TRANSITION TO A MORE ZONAL FLOW ALOFT WITH MOST
PRECIPITATION IN HIGH ELEVATIONS.  GFS DRIVES A TROF THROUGH THURSDAY
WITH COLD FRONT WHILE THE EUROPEAN STILL A BIT FASTER DRIVING IT
THROUGH LATE WEDNESDAY OR WEDNESDAY NIGHT.  WILL HAVE WELL ABOVE
NORMAL TEMPERATURES MONDAY THROUGH WEDNESDAY WITH SNOW LEVELS ABOVE
8 THOUSAND FEET.  GENERALLY WENT WITH CLIMATOLOGICAL POPS WEDNESDAY
AND THURSDAY WITH THE NEXT TROF AND KEPT MAINLY IN MOUNTAINS MONDAY
AND TUESDAY.  HAVE SLIGHT COOL DOWN THURSDAY AFTER THE WARM
CONDITIONS MONDAY THROUGH WEDNESDAY.
GK

AVIATION...WILL HAVE SOME ISOLATED TO SCATTERED RAIN OR SNOW
SHOWERS MAINLY NEAR IDAHO FALLS AND POCATELLO LATE THIS AFTERNOON
AND EARLY EVENING.  10 TO 20 KNOT WINDS AT BYI...IDA AND PIH AS WELL
INTO EARLY EVENING.  WILL GO VFR ACROSS THE BOARD AFTER SUNSET.  MAY
BE A THREAT FOR FOG AT IDA BUT FOR NOW KEPT IT VFR.  EXPECT VFR
CONDITIONS AT THE TAF SITES FRIDAY.
GK

&&

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

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE POCATELLO ID
617 AM MDT THU OCT 25 2012

IDZ017>025-031-032-261230-
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-
617 AM MDT THU OCT 25 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN IDAHO.

.DAY ONE...TODAY AND TONIGHT

SNOW OR SNOW SHOWERS WILL CONTINUE OFF AND ON INTO EARLY EVENING
ACROSS EASTERN IDAHO. ADDITIONAL SNOW ACCUMULATIONS OF 1-2 INCHES
ARE POSSIBLE IN THE MOUNTAINS WITH LESS THAN AN INCH FOR THE
VALLEYS. THE EXCEPTION WILL BE ACROSS PORTIONS OF THE UPPER SNAKE
PLAIN...HIGHLANDS AND EASTERN MOUNTAINS WHERE UP TO 3 INCHES OF
SNOW IS FORECAST. A WINTER WEATHER ADVISORY IS IN EFFECT THROUGH
NOON FOR AREAS NORTH AND EAST OF LINE FROM PALISADES RESERVOIR TO
RIGBY TO SMALL TO THE MONTANAN BORDER. 3 TO 6 INCHES TOTAL WITH LOCALLY
HIGHER AMOUNTS ARE POSSIBLE IN THESE AREAS.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

OCCASIONAL RAIN AND SNOW WILL AFFECT EASTERN IDAHO INTO EARLY NEXT
WEEK. AT THIS TIME...NO MAJOR RAIN OR SNOW EVENT IS EXPECTED. THE
BEST CHANCE OF SEEING MEASURABLE PRECIPITATION WILL BE ACROSS THE
CENTRAL AND EASTERN MOUNTAINS. TEMPERATURES WILL WARM UP
ESPECIALLY OVER THE WEEKEND...WITH HIGHS RETURNING TO THE 50S/LOW
60S IN THE VALLEYS. WE SHOULD SEE A STRONGER SYSTEM AFFECTING
EASTERN IDAHO FOR THE MIDDLE OF NEXT WEEK...POSSIBLY AS EARLY AS
HALLOWEEN.

.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.

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE POCATELLO ID
859 PM MDT THU OCT 25 2012

IDZ019-260600-
TETON ID-FREMONT ID-
859 PM MDT THU OCT 25 2012

THE NATIONAL WEATHER SERVICE IN POCATELLO HAS ISSUED A

SIGNIFICANT WEATHER ADVISORY FOR...
  SOUTH CENTRAL FREMONT COUNTY IN EASTERN IDAHO
  EASTERN TETON COUNTY IN SOUTHEAST IDAHO

UNTIL MIDNIGHT MDT

LIGHT ACCUMULATIONS OF SNOW IS EXPECTED ON HIGHWAY 32 AND 33 BETWEEN
DRIGGS AND SAINT ANTHONY UNTIL MIDNIGHT. THE SNOW WILL BE
ACCOMPANIED BY FREEZING FOG AT TIMES AND MAY LIMIT VISIBILITY TO
LESS THAN ONE MILE. THIS COULD PRODUCE SLICK ROAD CONDITIONS. USE
EXTREME CAUTION IF TRAVELING ON AREA ROADS.

LOCATIONS THAT COULD BE AFFECTED INCLUDE...
   SQUIRREL... FELT... DRIGGS AND  ASHTON...

LAT...LON 4413 11129 4373 11105 4363 11110 4363 11118
      4385 11128 4409 11151

RS

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE POCATELLO ID
1010 PM MDT THU OCT 25 2012

IDZ020-021-260715-
BINGHAM ID-BONNEVILLE ID-
1010 PM MDT THU OCT 25 2012

THE NATIONAL WEATHER SERVICE IN POCATELLO HAS ISSUED A

SIGNIFICANT WEATHER ADVISORY FOR...
  NORTHWESTERN BONNEVILLE COUNTY IN SOUTHEAST IDAHO
  CENTRAL BINGHAM COUNTY IN SOUTHEAST IDAHO

UNTIL 115 AM MDT

TRAVELERS ON INTERSTATE 15 BETWEEN BLACKFOOT AND IDAHO FALLS CAN
EXPECT LIGHT ACCUMULATIONS OF SNOW AND PATCHY FREEZING FOG THROUGH 1
AM MDT. THIS COULD PRODUCE SLICK ROAD CONDITIONS. USE EXTREME
CAUTION IF TRAVELING ON AREA ROADS.

LOCATIONS THAT COULD BE AFFECTED INCLUDE...
   FORT HALL EAGLE LODGE... ROSE... OSGOOD AND  BLACKFOOT...

LAT...LON 4361 11199 4303 11236 4305 11252 4360 11218

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE POCATELLO ID
121 AM MDT FRI OCT 26 2012

IDZ019-020-260915-
JEFFERSON ID-BINGHAM ID-BUTTE ID-BONNEVILLE ID-MADISON ID-FREMONT ID-
121 AM MDT FRI OCT 26 2012

THE NATIONAL WEATHER SERVICE IN POCATELLO HAS ISSUED A

SIGNIFICANT WEATHER ADVISORY FOR...
  EAST CENTRAL BUTTE COUNTY IN EAST CENTRAL IDAHO
  SOUTHWESTERN FREMONT COUNTY IN EASTERN IDAHO
  WESTERN MADISON COUNTY IN SOUTHEAST IDAHO
  NORTHWESTERN BONNEVILLE COUNTY IN SOUTHEAST IDAHO
  NORTH CENTRAL BINGHAM COUNTY IN SOUTHEAST IDAHO
  JEFFERSON COUNTY IN SOUTHEAST IDAHO

UNTIL 315 AM MDT

AREA OBSERVATIONS AND WEBCAMS SHOW AREAS OF FOG THIS MORNING
ACROSS THE ADVISORY AREA. IN SOME CASES...VISIBILITY IS DROPPING TO
NEAR ONE HALF MILE. DRIVE WITH CAUTION THIS MORNING WHEN YOU
ENCOUNTER THESE CONDITIONS AS PATCHY BLACK IS POSSIBLE ON ROADS
THROUGH THE EARLY MORNING.

LOCATIONS THAT COULD BE AFFECTED INCLUDE...
   THE INL COMPLEX...
   ATOMIC CITY...
   SAGE JUNCTION...
   IDAHO FALLS...
   SHELLEY...
   REXBURG...
   RIGBY...
   ST. ANTHONY...

FOR THE LATEST ROAD CONDITIONS...YOU CAN VISIT 5-1-1 DOT IDAHO DOT
GOV OR CALL 5-1-1 ON YOUR PHONE.

LAT...LON 4407 11149 4390 11160 4335 11206 4347 11306
      4378 11278 4402 11251

JKEYES