A ridge axis situated along the Idaho Oregon border allowed for terrain driven circulations to create broad lift and late day thunderstorms that lead to flash flooding over the central mountain ranges in Idaho.
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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 BOI wrote it up.
A ridge axis situated along the Idaho Oregon border allowed for terrain driven circulations to create broad lift and late day thunderstorms that lead to flash flooding over the central mountain ranges in Idaho.
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 Boise, ID wrote its last area forecast discussion before the first event at Jul 30, 1:41 PM MST, 1 hour 19 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BOISE ID 241 PM MDT WED JUL 30 2014 .SHORT TERM...GREATEST INSTABILITY AND CAPE THIS AFTERNOON ARE IN HARNEY COUNTY AND THUNDERSTORMS ARE ALREADY FORMING NEAR THERE WITH MORE STORMS UPSTREAM IN NERN CALIF. A WEAK PACIFIC SHORT WAVE TROUGH IS ALSO COMING INLAND. 0 TO 6 KM BULK SHEAR IS WEAK. WE HAVE DESIGNATED HARNEY COUNTY FOR THE MAIN THUNDERSTORM ACTIVITY THIS EVENING WITH LESSER ACTIVITY ELSEWHERE. STORMS SHOULD BE PULSE TYPE WITH LOCAL HEAVY RAIN AND GUSTY WINDS. ACTIVITY SHOULD WIND DOWN LATE THIS EVENING THROUGH THURSDAY MORNING THEN REDEVELOP THURSDAY AFTERNOON/EVENING AND AGAIN FRIDAY AFTERNOON/EVENING. LITTLE DAY-TO DAY CHANGE IN TEMPERATURES THROUGH FRIDAY. .LONG TERM...FRIDAY NIGHT THROUGH WEDNESDAY...ALTHOUGH MODELS CONTINUE TO DECREASE THE AMPLITUDE OF THE UPPER LEVEL RIDGE OVER WESTERN NORTH AMERICA...WARM TEMPERATURES ARE EXPECTED TO CONTINUE...AVERAGING 3-5 DEGREES ABOVE NORMAL. VERY MOIST AND UNSTABLE AIR IN THE RIDGE CIRCULATION WILL FUEL ISOLATED THUNDERSTORMS MAINLY AFTERNOONS AND EVENINGS EACH DAY. MODELS AGREE ON BRINGING A SHORTWAVE TROUGH NORTH OVER THE GREAT BASIN SUNDAY NIGHT AND MONDAY. THIS FEATURE WILL HELP SUPPORT CONVECTION OVER OUR AREA BEFORE MOVING EAST INTO COLORADO TUESDAY NIGHT. WITH PRECIPITABLE WATER AS MUCH AS HALF AN INCH ABOVE NORMAL...LOCAL HEAVY RAIN IS POSSIBLE WITH THUNDERSTORMS. .AVIATION...VFR. SCATTERED TO BROKEN MID LEVEL AND HIGH CLOUDS. ISOLATED THUNDERSTORMS MAINLY BEFORE 06Z. BASES 8K-10K FEET AGL. SURFACE WINDS...VARIABLE 10 KTS OR LESS EXCEPT GUSTS TO 30 KTS OR MORE NEAR THUNDERSTORMS. WINDS ALOFT...NORTH AROUND 10 KTS UP THROUGH 10K FEET MSL. && .BOI WATCHES/WARNINGS/ADVISORIES... ID...NONE. OR...RED FLAG WARNING UNTIL 11 PM PDT THIS EVENING ORZ636. && WEATHER.GOV/BOISE SHORT TERM...LC LONG TERM....JT/AB AVIATION.....JT
PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE BOISE ID
1108 AM MDT WED JUL 30 2014
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0540 PM HAIL 8 N MOUNTAIN HOME 43.25N 115.69W
07/29/2014 E1.00 INCH ELMORE ID LAW ENFORCEMENT
ELMORE COUNTY DEPUTY REPORTED QUARTER SIZE HAIL NEAR
IMMIGRANT ROAD AND CANYON CREEK ROAD.
&&
DDECKERThe Boise radar (KCBX), 123 km away, was scanning. The volume nearest the first event began at 21:59 UTC.
1 flash flood. Local standard time, as filed.
A few Forest Service roads were washed out in the Beaver Creek burn scar.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Idaho in 2014Every state in 2014This day in weather historyWarnings in Idaho, July 2014
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: 536902.