Severe Thunderstorm Warning 22, NWS Pocatello, ID

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE POCATELLO ID
200 PM MDT FRI JUN 5 2009

.SHORT TERM...TONIGHT THROUGH SUNDAY NIGHT.

LOW PRESSURE SYSTEM HAS MOVED ONSHORE AND IS MOVING NORTHEAST
ACROSS NEVADA. THIS SYSTEM IS EXPECTED TO MOVE THROUGH SOUTHEAST
IDAHO LATE TONIGHT AND ON SATURDAY. MEANWHILE...A COLD FRONT WILL
BE APPROACHING THE AREA FROM THE NORTHWEST. IT IS EXPECTED TO PUSH
THROUGH THE REGION SATURDAY NIGHT AND SUNDAY. THUS...CHANCES FOR
SHOWERS AND THUNDERSTORMS WILL REMAIN HIGH INTO SUNDAY UNTIL THESE
SYSTEMS CLEAR THE REGION. HEAVY RAIN ALONG WITH GUSTY WINDS AND
SMALL HAIL WILL REMAIN POSSIBLE TONIGHT WITH THE FOCUS SHIFTING TO
MAINLY HEAVY RAIN FOR SATURDAY AND SUNDAY AS THE FRONT MOVES
THROUGH THE REGION. FLASH FLOOD WATCHES REMAIN IN EFFECT FOR THE
CENTRAL MOUNTAINS...SOUTHERN HIGHLANDS AND PORTIONS OF THE EASTERN
HIGHLANDS. THESE AREAS HAVE SEEN CONSIDERABLE AMOUNTS OF RAIN OVER
THE PAST SEVERAL DAYS AND ARE SUSCEPTIBLE TO FLASH FLOODING AND
MUDSLIDES.

ONCE THE FRONT CLEARS THE REGION...TEMPERATURES WILL COOL
CONSIDERABLY AND CHANCES FOR PRECIPITATION WILL BE LESS.

.LONG TERM...MONDAY THROUGH FRIDAY.
UPPER TROF FINALLY MOVES EAST BY MONDAY WITH A COOL NORTHWESTERLY
FLOW ALOFT BEHIND COLD FRONT.  EXPECT WELL BELOW NORMAL
TEMPERATURES MONDAY WITH A CHANCE OF SHOWERS IN CYCLONIC FLOW
CONTINUING.  GFS AND EUROPEAN MODELS KEEP SOUTHEAST IDAHO IN COOL
PATTERN THROUGH NEXT WEEK WITH GFS ADVERTISING ANOTHER PACIFIC WAVE
APPROACHING WEDNESDAY AND ACTUALLY CLOSING OFF ANOTHER 500 MILLIBAR
LOW WEST OF IDAHO.  THIS WILL KEEP SHOWERS GOING ALL WEEK.  EUROPEAN
MORE OPEN WITH WAVE...BUT SIMILAR IN THE CONTINUED COLD AND WET
PATTERN.  DID NOT CHANGE GRIDS WITH PRECIPITATION WITH A CHANCE OF
SLIGHT CHANCE DAILY AND KEPT TEMPERATURES WITH WELL BELOW NORMAL
HIGH TEMPERATURES THROUGH FRIDAY.
GK

&&

.AVIATION...EXPECT SHOWERS AND THUNDERSTORMS AT ALL TAF SITES FOR A
LARGE CHUNK OF THIS EVENING AND SATURDAY.  MAINLY VFR BUT UNDER
HEAVIER SHOWERS WILL DROP TO MVFR CEILINGS AND VISIBILITIES.
GK

&&

.FIRE WEATHER...ANOTHER ROUND OF SHOWERS AND THUNDERSTORMS IS
FORECAST AGAIN TODAY WITH THE THREAT OF LOCALLY HEAVY RAIN...GUSTY
WINDS AND HAIL. GIVEN THE EXTREMELY MOIST AIRMASS IN PLACE...FLASH
FLOODING REMAINS POSSIBLE IN STEEPER TERRAIN AND WHERE THE GROUND IS
ALREADY WELL SATURATED. WET CONDITIONS WILL CONTINUE THROUGH THE
WEEKEND...WHEN THE LARGE UPPER LOW ALONG THE CALIFORNIA COAST SHIFTS
NORTHEAST PAST EASTERN IDAHO. DMH

&&

.PIH WATCHES/WARNINGS/ADVISORIES...
FLASH FLOOD WATCH THROUGH LATE TONIGHT FOR IDZ018-022>025-031-
032.

&&

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE POCATELLO ID
417 AM MDT FRI JUN 5 2009

IDZ017>025-031-032-061030-
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-
417 AM MDT FRI JUN 5 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN IDAHO.

.DAY ONE...TODAY AND TONIGHT

SHOWERS AND THUNDERSTORMS ARE EXPECTED AGAIN THROUGH TONIGHT
ACROSS EASTERN IDAHO. THERE IS A THREAT OF STRONG TO SEVERE STORMS
CAPABLE OF PRODUCING HEAVY RAIN...HAIL AND GUSTY WINDS. A FLASH
FLOOD WATCH IS IN EFFECT FOR ALL CENTRAL AND SOUTHERN MOUNTAINOUS
AREAS FOR THIS AFTERNOON AND TONIGHT. FOR MORE
INFORMATION...PLEASE REFER TO FFAPIH.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

SHOWERS AND ISOLATED THUNDERSTORMS WILL CONTINUE INTO NEXT WEEK.
THE GREATEST THREAT WILL BE SATURDAY INTO SUNDAY. THE THREAT OF
HEAVY RAIN IS POSSIBLE. HOWEVER...THE THREAT OF STRONG TO SEVERE
STORMS WILL BE LESS THAN TODAY. THE THREAT OF RIVER/SMALL STREAM
FLOODING MAY BECOME MORE OF AN ISSUE THAN FLASH FLOODING BY SUNDAY
AND EARLY NEXT WEEK.

MUCH COOLER WEATHER ARRIVES WITH TEMPERATURES COLD ENOUGH FOR SNOW
AT NIGHT ON THE HIGHER PEAKS. NO SIGNIFICANT SNOWFALL IS FORECAST
AT THIS TIME AND ANYTHING THAT FALLS WOULD MELT DURING THE
DAYLIGHT HOURS.

.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
549 PM MDT FRI JUN 5 2009

IDZ017-018-020>023-031-032-060115-
JEFFERSON ID-LINCOLN ID-MINIDOKA ID-ONEIDA ID-CUSTER ID-BUTTE
ID-BLAINE ID-BONNEVILLE ID-BINGHAM ID-POWER ID-BANNOCK ID-CASSIA ID-
549 PM MDT FRI JUN 5 2009

THE NATIONAL WEATHER SERVICE IN POCATELLO HAS ISSUED A

SIGNIFICANT WEATHER ADVISORY FOR...
  EASTERN BLAINE COUNTY IN CENTRAL IDAHO
  SOUTHEASTERN CUSTER COUNTY IN CENTRAL IDAHO
  BUTTE COUNTY IN EAST CENTRAL IDAHO
  CASSIA COUNTY IN SOUTH CENTRAL IDAHO
  MINIDOKA COUNTY IN SOUTH CENTRAL IDAHO
  EASTERN LINCOLN COUNTY IN SOUTH CENTRAL IDAHO
  WESTERN BANNOCK COUNTY IN SOUTHEAST IDAHO
  POWER COUNTY IN SOUTHEAST IDAHO
  WESTERN BINGHAM COUNTY IN SOUTHEAST IDAHO
  NORTHWESTERN BONNEVILLE COUNTY IN SOUTHEAST IDAHO
  ONEIDA COUNTY IN SOUTHEAST IDAHO
  SOUTHWESTERN JEFFERSON COUNTY IN SOUTHEAST IDAHO

UNTIL 715 PM MDT

AT 545 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
COMPLEX LINE OF NUMEROUS STRONG THUNDERSTORMS...MOVING NORTHEAST AT
30 MPH.

HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 40 MPH ARE
EXPECTED WITH THESE STORMS...ALONG WITH HEAVY RAIN.

THESE STORMS MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

LAT...LON 4201 11396 4253 11397 4253 11393 4276 11393
      4276 11398 4393 11402 4393 11229 4202 11238
TIME...MOT...LOC 2346Z 201DEG 31KT 4313 11319

HANKO

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PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO
724 PM MDT FRI JUN 05 2009

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0617 PM     HAIL             4 SW IDAHO FALLS        43.45N 112.09W
06/05/2009  E0.25 INCH       BONNEVILLE         ID   TRAINED SPOTTER

            PEA SIZE HAIL

0617 PM     HAIL             IDAHO FALLS             43.49N 112.04W
06/05/2009  E0.25 INCH       BONNEVILLE         ID   TRAINED SPOTTER

            PEA SIZE HAIL

&&

DPHELPS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO
736 PM MDT FRI JUN 05 2009

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0617 PM     HAIL             IDAHO FALLS             43.49N 112.04W
06/05/2009  E0.50 INCH       BONNEVILLE         ID   TRAINED SPOTTER

            MARBLE SIZE HAIL

0617 PM     TSTM WND GST     IDAHO FALLS             43.49N 112.04W
06/05/2009  M58 MPH          BONNEVILLE         ID   ASOS

            PEAK WIND AT IDAHO FALLS AIRPORT GUST OF 58 KNOTS OR 67
            MPH

&&

DPHELPS

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE POCATELLO
745 PM MDT FRI JUN 5 2009

IDZ021>023-060230-
ONEIDA ID-BINGHAM ID-POWER ID-BANNOCK ID-
745 PM MDT FRI JUN 5 2009

THE NATIONAL WEATHER SERVICE IN POCATELLO HAS ISSUED A

SIGNIFICANT WEATHER ADVISORY FOR...
  WESTERN BANNOCK COUNTY IN SOUTHEAST IDAHO
  EAST CENTRAL POWER COUNTY IN SOUTHEAST IDAHO
  SOUTHWESTERN BINGHAM COUNTY IN SOUTHEAST IDAHO
  NORTH CENTRAL ONEIDA COUNTY IN SOUTHEAST IDAHO

UNTIL 830 PM MDT

AT 743 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM ABERDEEN TO 5 MILES
WEST OF HAWKINS..AND MOVING NORTHEAST AT 30 MPH.

HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THESE STORMS...ALONG WITH HEAVY RAIN AND FREQUENT
DANGEROUS LIGHTNING.

LOCATIONS IMPACTED INCLUDE...
   ABERDEEN AND  CRYSTAL...
   ARBON VALLEY...
   MICHAUD AND  POCATELLO AIRPORT...
   POCATELLO...
   CHUBBUCK... PORTNEUF AND  SPRINGFIELD...
   FORT HALL... GIBSON AND  PINGREE...

THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

LAT...LON 4287 11295 4328 11280 4328 11272 4294 11221
      4240 11237
TIME...MOT...LOC 0145Z 193DEG 27KT 4289 11284 4256 11243

HANKO

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO
748 PM MDT FRI JUN 05 2009

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0617 PM     TSTM WND GST     RIGBY                   43.67N 111.92W
06/05/2009  E50 MPH          JEFFERSON          ID   TRAINED SPOTTER

            GUST TO 50 MPH

&&

DPHELPS