Multiple severe reports occurred on July 22nd.
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.
Multiple severe reports occurred on July 22nd.
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 22, 8:43 AM MST, 3 hours 52 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE POCATELLO ID 943 AM MDT TUE JUL 22 2008 .UPDATE... SEVERE THUNDERSTORMS LOOKING MORE LIKELY THIS AFTERNOON. SUN HAS BROKEN OUT OVER MUCH OF THE AREA AND IT IS VERY HUMID BY WESTERN STANDARDS. LIFTED INDICIES ARE EXPECTED TO BE AROUND -4 BY THIS AFTERNOON...PRETTY UNSTABLE. DAMAGING WINDS AND LARGE HAIL ARE A DISTINCT POSSIBILITY. RAISED RAIN CHANCES FOR THE AFTERNOON AND EVENING WITH THE MODELS COMING INTO ALIGNMENT WITH THE TIMING OF THE PRECIPITATION. EXPECT A LINE OF STORMS TO DEVELOP OVER THE LOWER VALLEY EARLY THIS AFTERNOON AND THEN BEGIN MOVING UP THE VALLEY AND INTO THE EASTERN HIGHLANDS EARLY THIS EVENING. FLASH FLOOD WATCH REMAINS IN EFFECT FOR THE CENTRAL MOUNTAINS. RECENT BURN AREAS ALONG WITH AREAS TYPICALLY PRONE TO MUDSLIDES WILL BE ESPECIALLY SUSCEPTIBLE. && .PREV DISCUSSION... /ISSUED 248 AM MDT TUE JUL 22 2008/ 35IN TO CAUSE PROBLEMS. WILL GO WITH A FLASH FLOOD WATCH FOR PARTS OF THE CEN MTNS TODAY...HIGHLIGHTING THE BURN AREA THREAT. THE UPEPR TROF PASSES TO THE EAST TONIGHT...CUTTING OFF THE MONSOON FLOW. A MIOR TROF MOVES THRU ON WED...BUT WITH THE LOSS OF THE MONSOON MSTR...ONLY EXPECTING ISOLD TSTMS IN THE NRN MTNS. UPPER RIDGING RETURNS ON THU AND PREVAILS INTO THE WEEKEND. THE RIDGE MOVES OFF TO THE EAST BY SAT NIGHT. THIS WILL PUT ID BACK INTO SW FLOW AND A POSSIBLE RETURN OF THE MONSOON MSTR. THE GFS SHOWS THE MONSOON FLOW CONTINUING TO THE END OF THE FCST PERIOD...SO HAVE ADDED MTN TSTMS DURING THE AFT/EVE FROM SUN THRU THE END OF THE PERIOD. HEDGES AVIATION...GFS AND NAM ARE HINTING AT PRECIPITATION FOCUS MORE OVER THE CENTRAL IDAHO MOUNTAINS THAN IN THE SNAKE RIVER PLAIN AND SOUTHERN/EASTERN HIGHLANDS THAN YESTERDAY. HOWEVER...MOS GUIDANCE INDICATES ABOUT SAME LEVEL OF PROBABILITY. SINCE CONVECTIVE PARAMETERS IN MODELS ARE MORE TO REMOVE BUILDING INSTABILITY OUT OF MODEL RATHER THAN PINPOINT LOCATION OF PRECIPITATION...WILL KEEP THE BROADER COVERAGE WITH TSRA POSSIBLE AT ANY AIRDROME. SKIES WILL BEGIN TO CLEAR LATE TONIGHT. STILL...DO NOT EXPECT ANY CEILING IMPACTS AND EVEN REDUCTIONS IN VISIBILITY WILL BE TOUGH AFTER SOME LIGHT RAINFALL YESTERDAY...NO BLDU. WIND IS WEAK ALOFT AND DO NOT EXPECT MUCH MORE THAN GUSTS TO 35KT AT ANY AIRPORT. MESSICK FIRE WEATHER...RED FLAG WARNING CONTINUES WITH MOIST UNSTABLE AIR ALSO CONTINUING TODAY. MORE UPPER LEVEL SUPPORT TODAY...IN THE FORM OF LOW PRESSURE CROSSING THROUGH SOUTHERN IDAHO...THAT ENHANCES UPWARD VERTICAL MOTION...SO MAY SEE MORE THUNDERSTORMS THAN ON MON. WED SHOULD BE MUCH DRIER AS INSTABILITY AND THE MOISTURE HAVE BOTH MOVED EASTWARD WITH DRY WESTERLIES ALOFT UNTIL SAT NIGHT. MESSICK && .PIH WATCHES/WARNINGS/ADVISORIES... RED FLAG WARNING UNTIL 10 PM MDT THIS EVENING FOR IDZ409-410-412- 477. FLASH FLOOD WATCH THROUGH THIS EVENING FOR IDZ018-031. &&
HAZARDOUS WEATHER OUTLOOK...CORRECTED NATIONAL WEATHER SERVICE POCATELLO ID 719 AM MDT TUE JUL 22 2008 IDZ017>025-031-032-231200- 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- 719 AM MDT TUE JUL 22 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN IDAHO. .DAY ONE...TODAY AND TONIGHT SCATTERED THUNDERSTORMS MAY PRODUCE ENOUGH RAINFALL TO CAUSE FLASH FLOODING/DEBRIS FLOWS IN BURN AREAS OF THE CENTRAL MOUNTAINS TODAY AND THIS EVENING. A FLASH FLOOD WATCH HAS BEEN ISSUED FOR THESE AREAS. LATER THIS AFTERNOON...THUNDERSTORMS ACROSS THE CENTRAL MOUNTAINS AND SOUTHEAST IDAHO COULD PRODUCE STRONG WIND GUSTS AND LARGE HAIL. LIGHTNING FROM THUNDERSTORMS MAY ALSO RESULT IN FIRE STARTS...SO A RED FLAG WARNING CONTINUES TODAY FOR THE SNAKE RIVER PLAIN...AND PARTS OF THE CENTRAL MOUNTAINS AND SOUTHERN HIGHLANDS .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .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.
The Boise radar (KCBX), 129 km away, was scanning. The volume nearest the first event began at 19:33 UTC.
7 hail, 3 thunderstorm wind, 2 flash flood. Local standard time, as filed.
Trees downed in Redfish Lake Area on power lines causing power outages.
Tree downed on a house in Challis with a reported 61 mph wind gust. Power was knocked out for 2 hours in the entire city of Challis.
The Morgan Creek area had several roads washed out by heavy rains.
The Galena Lodge deck was completely submereged with water.
Nickel sized hail west of Minidoka.
Winds damaged power lines and knocked out power in Minidoka County.
Large hail damaged crops in Bone.
Extensive quarter sized hail near Victor.
Three quarter inch hail west of American Falls.
Quarter sized hail in Victor.
Penny sized hail near Island Park.
Nickel sized hail at Driggs.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Idaho in 2008Every state in 2008This day in weather historyWarnings in Idaho, July 2008
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: 127856, 127857, 127859, 127862, 127865, 127886, 127887, 127869, 127879, 127882, 127889, 127883.