Severe convective weather on July 3rd.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS PIH wrote it up.
Severe convective weather on July 3rd.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Pocatello, ID wrote its last area forecast discussion before the first event at Jul 3, 1:18 PM MST, 42 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE POCATELLO ID 218 PM MDT FRI JUL 3 2009 .DISCUSSION...MONSOON MOISTURE COTINUES TO FLOW INTO ID TODAY. A MINOR WAVE IN THE SW FLOW SHOWS UP OVER NRN NV ON THE WV LOOP. TSTMS DEVELOPING THS AFTN IN THE DESTABILIZING AIRMASS OVER THE MTNS. COVERAGE SHOULD CONTINUE TO INCREASE INTO THE EVENING HOURS. PW VALUES RUNNING OVER 0.9 IN ACCORDING TO NAM BUFR SOUNDINGS...SO LOCALLY HEAVY RAINFALL IS POSSIBLE WITH SOME OF THE TSTMS. SOME RADAR INDICATIONS OF SMALL HAIL IN THE TSTMS. UPPER RIDGING BEGINS TO DOMINATE ON SATURDAY...BUT LINGERING MONSOON MOISTURE WILL BRING THE THREAT FOR AFTN/EVE TSTMS AGAIN. TSTM CHANCES DECREASE BY SUNDAY AS THE RIDGE BUILDS. BY TUE...A BROAD UPPER TROF MOVES INTO THE W COAST...WHICH STRENGTHENS THE SW FLOW OVER ID. GFS NOT SHOWING MUCH MONSOON MOISTURE...SO ONLY EXPECTING ISOLD TSTMS IN THE CEN MTNS THRU THE REST OF THE FCST PERIOD. HEDGES && .AVIATION...THUNDERSTORMS HAVE DEVELOPED IN THE LAST HOUR...ALTHOUGH FEW SHOWERS OUTSIDE THE STORM CELLS. STRONG CAPE AND STRONGLY NEGATIVE LIFTED INDICES LINGER UNTIL LATE TONIGHT...THUS HAVE GONE LONGER THAN NORMAL WITH -TSRA AND KEPT RAIN SHOWERS THROUGH OUT THE NIGHT PERIOD. A WIND SHIFT TO THE WEST SHOULD DRY AND STABILIZE THE ATMOSPHERE ON SAT. STILL NOT EXPECTING SIGNIFICANT WIND OUTSIDE OF -TSRA OR ANY CEILING/VISIBILITY PROBLEMS...AGAIN OUTSIDE OF -TSRA. AT THIS TIME...COVERAGE NOT EXPECTED TO INTRODUCE TEMPO GROUPS FOR THUNDERSTORMS AND HAVE LEFT IT AS VCTS. MESSICK && .FIRE WEATHER...SUBTROPICAL MOISTURE STILL OVER THE FORECAST AREA AND SHOULD LINGER FOR ANOTHER 36 HOURS. AN EVENTUAL WIND SHIFT TO THE WEST EITHER SAT AFTERNOON OR SAT NIGHT WILL DRY AND STABILIZE THE ATMOSPHERE. WIND ALSO EXPECTED TO INCREASE AS AN UPPER LEVEL TROUGH MOVES IN FROM THE WEST. BY MON...PRECIP THREAT GOES TO NEAR ZERO AND TEMPERATURES WITH THE INCOMING LOW DROP. MESSICK && .PIH WATCHES/WARNINGS/ADVISORIES... NONE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE POCATELLO ID 417 AM MDT FRI JUL 3 2009 IDZ017>025-031-032-041030- 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 JUL 3 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN IDAHO. .DAY ONE...TODAY AND TONIGHT MONSOONAL MOISTURE IS EXPECTED TO TRIGGER SCATTERED SHOWERS AND THUNDERSTORMS TODAY THROUGH THIS EVENING. SOME OF THESE STORMS MAY BE STRONG AND COULD PRODUCE HEAVY DOWNPOURS...SMALL HAIL AND WIND GUSTS TO 50 MPH. ACTIVITY IS EXPECTED TO WEAKEN AND BECOME ISOLATED OVERNIGHT. THE SNAKE RIVER AT BLACKFOOT REMAINS JUST BELOW FLOOD STAGE. HEAVY RAINFALL IS POSSIBLE TODAY AND MAY AGGRAVATE ALREADY HIGH WATER LEVELS. CONTINUE TO MONITOR THE LATEST FORECASTS FOR UPDATES ON THIS SITUATION. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED FOR THE FOURTH OF JULY. THE BEST CHANCES FOR PRECIPITATION WILL BE IN THE SOUTHERN AND EASTERN HIGHLANDS. LOCALLY HEAVY RAINFALL WILL ALSO BE POSSIBLE IN THESE AREAS. ACTIVITY WILL WEAKEN AND BECOME ISOLATED IN THE EVENING HOURS. DRIER WEATHER IS EXPECTED FOR THE FIRST HALF OF NEXT WEEK. .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
154 PM MDT FRI JUL 3 2009
IDZ032-032045-
CUSTER ID-BUTTE ID-
154 PM MDT FRI JUL 3 2009
THE NATIONAL WEATHER SERVICE IN POCATELLO HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY FOR...
SOUTHEASTERN CUSTER COUNTY IN CENTRAL IDAHO
WEST CENTRAL BUTTE COUNTY IN EAST CENTRAL IDAHO
UNTIL 245 PM MDT
AT 153 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR LOST RIVER..MOVING EAST AT 10 MPH.
HAIL UP TO THE SIZE OF PENNIES AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THIS STORM.
LOCATIONS IMPACTED INCLUDE...
RURAL WESTERN BUTTE COUNTY...
RURAL SOUTHEASTERN CUSTER COUNTY...
LAT...LON 4378 11328 4356 11337 4356 11340 4369 11372
4380 11365
TIME...MOT...LOC 1954Z 277DEG 8KT 4370 11353
HEDGESPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO
228 PM MDT FRI JUL 03 2009
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0227 PM HAIL 3 S ARCO 43.60N 113.31W
07/03/2009 E0.50 INCH BUTTE ID TRAINED SPOTTER
0227 PM HAIL 3 S ARCO 43.60N 113.31W
07/03/2009 M0.50 INCH BUTTE ID TRAINED SPOTTER
&&
PANGELSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE POCATELLO 237 PM MDT FRI JUL 3 2009 IDZ020-032-032130- BUTTE ID- 237 PM MDT FRI JUL 3 2009 THE NATIONAL WEATHER SERVICE IN POCATELLO HAS ISSUED A SIGNIFICANT WEATHER ADVISORY FOR... CENTRAL BUTTE COUNTY IN EAST CENTRAL IDAHO UNTIL 330 PM MDT AT 236 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM NEAR ARCO..MOVING EAST AT 15 MPH. HAIL UP TO THE SIZE OF PENNIES AND WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... CENTRAL INL... LAT...LON 4381 11278 4347 11282 4359 11334 4379 11335 TIME...MOT...LOC 2037Z 276DEG 11KT 4365 11324 HEDGES
The Pocatello radar (KSFX), 150 km away, was scanning. The volume nearest the first event began at 21:00 UTC.
1 flash flood, 1 thunderstorm wind. Local standard time, as filed.
Heavy rain from a thunderstorm caused a mudslide over the Castle Rock burn area causing Warm Springs Road to be closed. The mud was 2 feet deep and 30 feet wide on the road.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Idaho in 2009Every state in 2009This day in weather historyWarnings in Idaho, July 2009
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 191459, 191458.