5 inches in 15 minutes caused trees to be uprooted with the Arbon Valley Highway flooded in multiple spots.
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.
Extremely heavy rainfall at 1.5 inches in 15 minutes caused trees to be uprooted with the Arbon Valley Highway flooded in multiple spots.
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 Jun 15, 12:27 PM MST, 1 hour 44 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE POCATELLO ID 127 PM MDT MON JUN 15 2009 .DISCUSSION... LOW PRESSURE SYSTEM IS MOVING THROUGH EASTERN IDAHO THIS AFTERNOON. NUMEROUS SHOWERS AND THUNDERSTORMS HAVE DEVELOPED IN THE AFTERNOON HEATING ACROSS THE REGION. SMALL HAIL ALONG WITH HEAVY DOWNPOURS HAVE BEEN ASSOCIATED WITH THESE STORMS THIS AFTERNOON. FLASH FLOOD WATCHES REMAIN IN EFFECT FOR THE HIGH COUNTRY WHERE RECENT RAINS HAVE MADE SOIL CONDITIONS EXTREMELY VULNERABLE. MUDSLIDES...FLASH FLOODING OF STREAMS AND URBAN STREETS IS POSSIBLE WITH THESE STORMS. THE LOW PRESSURE SYSTEM WILL MOVE OFF TO THE EAST ON TUESDAY. HOWEVER...MOISTURE WILL STILL BE AROUND TO GENERATE THUNDERSTORMS DURING THE HEAT OF THE DAY. COVERAGE IS EXPECTED TO BE MUCH LESS AND MAINLY CONFINED TO THE HIGH COUNTRY SINCE THE LOW WILL BE MOVING AWAY FROM THE AREA. NUMEROUS SHOWERS AND THUNDERSTORMS ARE ONCE AGAIN EXPECTED FOR WEDNESDAY AS AN UPPER LEVEL TROUGH...CURRENTLY MOVING TOWARDS THE WEST COAST...INTERACTS WITH A LOW PRESSURE SYSTEM OVER THE SOUTHWESTERN U.S. THIS WILL DRAW MOISTURE UP FROM THE SOUTH WITH THE TROUGH PROVIDING ENOUGH ENERGY TO PRODUCE GOOD THUNDERSTORM COVERAGE...ESPECIALLY IN THE AFTERNOON. THUNDERSTORMS SHOULD BE LIMITED TO MAINLY THE EASTERN HIGHLANDS THURSDAY AFTERNOON AS THE TROUGH WILL BE MOVING AWAY FROM THE AREA AND HIGH PRESSURE WILL BE MOVING INTO THE AREA. FRIDAY COULD ACTUALLY BE DRY. ALTHOUGH THE DRYNESS LOOKS TO BE SHORT LIVED. MODELS ARE PICKING UP ON A SHORTWAVE TROUGH MOVING THROUGH THE AREA FRIDAY NIGHT AND SATURDAY WHICH COULD PRODUCE SHOWERS AND THUNDERSTORMS. ALTHOUGH COVERAGE WITH THIS SYSTEM LOOKS MAINLY ISOLATED AND LIMITED TO THE HIGH COUNTRY. BY SUNDAY AND MONDAY THE FLOW TURNS SOUTHWEST AGAIN AND A STRONGER LOW PRESSURE SYSTEM BEGINS TO ENCROACH UPON THE REGION. SO...CHANCES FOR SHOWERS AND THUNDERSTORMS COULD BE INCREASING ONCE AGAIN. && .AVIATION...SHOWERS AND THUNDERSTORMS WILL BE MOST NUMEROUS THROUGH THIS EVENING...WITH A TREND TO MORE ISOLATED ACTIVITY TONIGHT. FOR TUESDAY...CONVECTION PICKS UP DURING THE DAY WITH MOST OF THE STORMS FORMING OVER THE MTNS. VFR CONDITIONS EXPECTED WITH MVFR/LOCAL IFR VIS/CIGS WITH HEAVIER ACTIVITY. KEYES && .FIRE WEATHER...AN AREA OF LOW PRESSURE WILL CONTINUE TO WORK AWAY FROM THE AREA TODAY. SHOWERS AND STORMS WILL DECREASE OVERNIGHT AND TUESDAY...BECOMING ISOLATED OVER THE SNAKE PLAIN AND WIDELY SCATTERED DURING THE DAY OVER THE MOUNTAINS. A SYSTEM ON WEDNESDAY WILL AGAIN BRING AN INCREASE IN SHOWERS AND STORMS. DRIER CONDITIONS RETURN FOR THURSDAY AND FRIDAY...WITH MAINLY ISOLATED STORMS OVER THE MOUNTAINS. THERE WILL ALSO BE AN INCREASE IN THE OVERALL WIND FLOW BEGINNING WEDNESDAY WITH WESTERLY WINDS PICKING UP IN THE AFTERNOON. KEYES && .PIH WATCHES/WARNINGS/ADVISORIES... FLASH FLOOD WATCH UNTIL MIDNIGHT MDT TONIGHT FOR IDZ018-019- 022>025-031-032. &&
HAZARDOUS WEATHER OUTLOOK...CORRECTED NATIONAL WEATHER SERVICE POCATELLO ID 624 AM MDT MON JUN 15 2009 IDZ017>025-031-032-161230- 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- 624 AM MDT MON JUN 15 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN IDAHO. .DAY ONE...TODAY AND TONIGHT NUMEROUS SHOWERS AND THUNDERSTORMS ARE EXPECTED TO DEVELOP AGAIN THIS AFTERNOON. SMALL HAIL AND LOCALLY HEAVY RAINFALL CAN BE EXPECTED. LOW FLASH FLOOD GUIDANCE FROM THE RIVER FORECAST CENTER AND SATURATED SOILS SUPPORT THE CONTINUATION OF A FLASH FLOOD WATCH FOR MOUNTAINOUS AREAS OVER SOUTHEAST IDAHO UNTIL MIDNIGHT TONIGHT. SMALL STREAMS AND URBAN AREAS WILL BE PARTICULARLY VULNERABLE TO FLASH FLOODING...REFER TO LATEST BULLETIN FOR DETAILS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY EXPECT ISOLATED SHOWERS AND THUNDERSTORMS TUESDAY AFTERNOON OVER THE MOUNTAINS WITH MORE WIDESPREAD SHOWERS AND THUNDERSTORMS WEDNESDAY AFTERNOON. THURSDAY AND FRIDAY EXPECT LOW PRECIPITATION CHANCES AND WARMER TEMPERATURES WITH BRIEF HIGH PRESSURE. SATURDAY AND SUNDAY EXPECT CHANCES OF PRECIPITATION TO RETURN WITH WEAK LOW PRESSURE MOVING IN THE AREA. .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.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO
144 PM MDT MON JUN 15 2009
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0141 PM HEAVY RAIN WESTON 42.04N 111.98W
06/15/2009 M0.75 INCH FRANKLIN ID CO-OP OBSERVER
HEAVY RAINSHOWER BEGAN AT 1238 WITH HEAVIEST AMOUNT
FALLING IN 45 MINUTES. RAINING LIGHTLY AT TIME OF REPORT.
&&
GWICKLUNThe Salt Lake City radar (KMTX), 103 km away, was scanning. The volume nearest the first event began at 21:10 UTC.
1 flash flood. Local standard time, as filed.
Extremely heavy rainfall at 1.5 inches in 15 minutes caused trees to be uprooted with the Arbon Valley Highway flooded in multiple spots.
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, June 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: 182411.