Severe Thunderstorm Warning 12, NWS Pocatello, ID

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE POCATELLO ID
134 PM MDT TUE JUN 2 2009

.SHORT TERM...TONIGHT THROUGH THURSDAY NIGHT.

UPPER LOW OFF OF THE COAST OF CALIFORNIA CONTINUES TO PUMP A LOT
OF MOISTURE INTO SOUTHEAST IDAHO. FLOOD WATCHES CONTINUE FOR THE
SOUTHERN AND EASTERN HIGHLANDS AND FOR THE CASTLE ROCK FIRE AREA
NEAR KETCHUM. NUMEROUS SLIDES AND/OR WATER OVER ROADWAYS HAS
OCCURRED OVER THE PAST 24 HOURS IN THESE AREAS. ADDITIONAL
THUNDERSTORMS ARE LIKELY THIS EVENING AND THESE THUNDERSTORMS HAVE
THE CAPABILITY OF PRODUCING ADDITIONAL SLIDES AND/OR FLOODING.

EXPECT PRECIPITATION TO DIMINISH MUCH MORE THAN LAST NIGHT SINCE
THERE APPEARS TO BE NO UPPER LEVEL FEATURES MOVING INTO THE AREA
TONIGHT. CONVECTION IS EXPECTED TO REDEVELOP DURING THE HEAT OF
THE DAY WEDNESDAY. ALTHOUGH COVERAGE MAY NOT BE AS MUCH AS PAST
COUPLE OF DAYS DUE TO THE INFLUENCE OF A VERY WEAK UPPER LEVEL
RIDGE INTO THE AREA. THIS CONVECTION SHOULD DIMINISH ONCE AGAIN
WEDNESDAY NIGHT WITH THE LOSS OF DAYTIME HEATING. EXPECT
REDEVELOPMENT AGAIN ON THURSDAY WITH COVERAGE EXPECTED TO BE
BETTER AS RIDGE MOVES OFF TO THE EAST. FLOODING IN THE SOUTHERN
AND EASTERN HIGHLANDS MAY NOT BE AS MUCH OF A CONCERN ON THURSDAY
DUE TO THE LESSER COVERAGE BUT COULD BE A PROBLEM ONCE AGAIN
FRIDAY. THE CASTLE ROCK AREA WILL REMAIN SUSCEPTIBLE DURING THE
ENTIRE TIME. AS LITTLE AS A QUARTER OF AN INCH OF RAIN IN A SHORT
DURATION ON THE BURN AREA WOULD LIKELY TRIGGER ADDITIONAL SLIDES.

.LONG TERM...FRIDAY THROUGH TUESDAY NIGHT.

UPPER LOW IS EXPECTED TO SLOWLY PUSH INLAND OVER CENTRAL
CALIFORNIA ON FRIDAY. AS IT MOVES INLAND...IT WILL GRADUALLY FILL
AND LIFT NORTHEASTWARD. THE LOW OPENS TO A TROUGH OVER IDAHO ON
SUNDAY AND FINALLY EXITS THE AREA MONDAY. WITH THIS IN MIND...A
VERY WET PATTERN IS EXPECTED TO PERSIST THROUGHOUT THE LONG RANGE.
FLOODING CONCERNS WILL BE ONGOING WITH AT LEAST A CHANCE OF
SHOWERS AND THUNDERSTORMS EACH PERIOD. HIGH TEMPERATURES EXPECTED
TO BE SLIGHTLY BELOW NORMAL THROUGH THE FORECAST. HANKO

&&

.AVIATION...SCATTERED SHOWERS AND TSTMS WILL LIFT ACROSS THE REGION
FROM THE SOUTH THRU MIDNIGHT AS MONSOON MOISTURE CONTINUES TO FLOW
INTO THE AREA. BRIEF MVFR CIGS/VIS ARE POSSIBLE IN SOME OF THE
HEAVIER SHOWERS. SHOWERS ARE EXPECTED TO DIMINISH IN COVERAGE AFTER
MIDNIGHT...HOWEVER SCATTERED SHOWERS AND THUNDERSTORMS REDEVELOPING
LATE TOMORROW MORNING. HANKO

&&

.FIRE WEATHER...SHOWERS AND THUNDERSTORMS WILL CONTINUE THROUGH THE
NEXT FEW DAYS AS MONSOON MOISTURE PERSISTS OVER THE NORTHERN ROCKIES
AND THE GREAT BASIN. AREAS OF HEAVY RAIN ARE POSSIBLE. RELATIVE
HUMIDITY READINGS WILL REMAIN HIGHER THAN NORMAL DUE TO THE MOIST
AIRMASS AND WET GROUND IN MOST AREAS. THESE CONDITIONS ARE EXPECTED
TO CONTINUE THROUGH THE WEEKEND. HEDGES

&&

.PIH WATCHES/WARNINGS/ADVISORIES...
FLASH FLOOD WATCH UNTIL 10 PM MDT THIS EVENING FOR IDZ022>025-
031.

&&

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE POCATELLO ID
415 AM MDT TUE JUN 2 2009

IDZ017>025-031-032-031300-
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-
415 AM MDT TUE JUN 2 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN IDAHO.

.DAY ONE...TODAY AND TONIGHT

A FLASH FLOOD WATCH IS IN EFFECT FOR PORTIONS OF SOUTHERN AND
CENTRAL IDAHO.  SEE THE LATEST URGENT WEATHER MESSAGE FOR DETAILS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH NEXT TUESDAY

DAILY AFTERNOON AND EVENING SHOWER AND THUNDERSTORM ACTIVITY WILL
CONTINUE THROUGH THIS PERIOD.  HEAVY SHOWERS...PRODUCING A FLASH
FLOOD THREAT...WILL RETURN ON SATURDAY AND SUNDAY.

.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
347 PM MDT TUE JUN 2 2009

IDZ022-023-022245-
ONEIDA ID-POWER ID-BANNOCK ID-
347 PM MDT TUE JUN 2 2009

THE NATIONAL WEATHER SERVICE IN POCATELLO HAS ISSUED A

SIGNIFICANT WEATHER ADVISORY FOR...
  CENTRAL BANNOCK COUNTY IN SOUTHEAST IDAHO
  EAST CENTRAL POWER COUNTY IN SOUTHEAST IDAHO
  EXTREME NORTH CENTRAL ONEIDA COUNTY IN SOUTHEAST IDAHO

UNTIL 445 PM MDT

AT 343 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR CRYSTAL..MOVING NORTHEAST AT 10 MPH.

WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH
HEAVY RAIN.

LOCATIONS IMPACTED INCLUDE...
   CRYSTAL...
   HAWKINS...
   MCCAMMON...

LAT...LON 4281 11223 4256 11209 4245 11259 4262 11268
TIME...MOT...LOC 2147Z 247DEG 9KT 4257 11251

HUSTON