Daytime heating combined with a weak wave of low pressure moving out of California lead to thunderstorms with large hail of portions of South Central 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.
Daytime heating combined with a weak wave of low pressure moving out of California lead to thunderstorms with large hail of portions of South Central 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 29, 1:49 PM MST, 2 hours 41 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BOISE ID 249 PM MDT TUE JUL 29 2014 .SHORT TERM...AT 2PM ISOLATED THUNDERSTORMS WERE FORMING IN THE MOUNTAINS NEAR ALL OUR CWA BORDERS...EARLIER THAN YESTERDAY. AIR MASS WAS QUITE MOIST AND UNSTABLE THIS MORNING BUT ON A GRADUAL DRYING AND STABILIZING TREND THIS AFTERNOON...AT LEAST ACCORDING TO MODELS. THEREFORE WE EXPECT THUNDERSTORMS TO REMAIN ISOLATED. WITH ONLY LIGHT WINDS ALOFT THEY WILL MOVE SLOWLY AND MAY DROP HEAVY RAINS. MODELS SUGGEST HIGHEST POPS IN OREGON ZONES THIS EVENING THEN LOW POPS IN ALL ZONES LATER TONIGHT AND WEDNESDAY MORNING. HIGHEST POPS WEDNESDAY AFTERNOON WILL BE IN ERN-MOST IDAHO ZONES. THURSDAY AFTERNOON WILL HAVE INCREASING POPS IN ALL AREAS. MODELS... ESPECIALLY GFS...TAP SOME HIGH-LEVEL TROPICAL MOISTURE FROM HERNAN OFF BAJA CALIF AND ADVECT IT NEWD INTO OUR CWA THURSDAY. TEMPS A TAD COOLER WEDNESDAY AND AGAIN THURSDAY. .LONG TERM...THURSDAY NIGHT THROUGH TUESDAY...THE VERY WARM UPPER LEVEL RIDGE OVER WESTERN NORTH AMERICA SHOWS SIGNS OF LOSING AMPLITUDE THIS WEEKEND...BUT ONLY SLIGHTLY LOWER TEMPERATURES ARE EXPECTED. MONSOON MOISTURE WITHIN THE RIDGE CIRCULATION WILL MAINTAIN FAVORABLE CONDITIONS FOR CONVECTION. WEAK DISTURBANCES EMBEDDED IN THE SOUTHWEST FLOW ALOFT OVER OUR AREA...COMBINED WITH DAYTIME HEATING...WILL PROVIDE SUPPORT FOR ISOLATED TO SCATTERED THUNDERSTORMS EACH DAY. THE BEST CHANCES WILL BE THURSDAY EVENING AND SUNDAY AFTERNOON AND EVENING. MONDAY AND TUESDAY THE UPPER LEVEL FLOW WILL TURN MORE WESTERLY...BRINGING DRIER AIR AND DECREASING THE CHANCE OF THUNDERSTORMS. && .AVIATION...VFR. EXPECT WIDELY SCATTERED THUNDERSTORMS THROUGH THIS EVENING IN OREGON OVER HARNEY AND SOUTHERN MALHEUR COUNTIES...AND IN IDAHO SOUTH OF THE SNAKE RIVER VALLEY AND OVER THE CENTRAL MOUNTAINS. THUNDERSTORMS WILL BECOME ISOLATED AFTER 06Z...THEN INCREASE IN COVERAGE AFTER 18Z WEDNESDAY. SURFACE WINDS...VARIABLE 5-10 KTS EXCEPT STRONGER AND GUSTY NEAR THUNDERSTORMS. WINDS ALOFT... NORTHWEST 5-10 KTS UP THROUGH 10K FEET MSL. && .BOI WATCHES/WARNINGS/ADVISORIES... ID...NONE. OR...NONE. && WEATHER.GOV/BOISE SHORT TERM...LC LONG TERM....JT/AB AVIATION.....JT
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BOISE ID 449 PM MDT TUE JUL 29 2014 IDZ013-014-292345- UPPER TREASURE VALLEY ID-BOISE MOUNTAINS ID- 449 PM MDT TUE JUL 29 2014 ...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL OWYHEE AND SOUTH CENTRAL ELMORE COUNTIES UNTIL 545 PM MDT... AT 448 PM MDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 10 MILES SOUTHWEST OF ANDERSON DAM...OR 10 MILES NORTH OF MOUNTAIN HOME...MOVING SOUTH AT 15 MPH. HALF INCH HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH THIS STORM. THIS STRONG THUNDERSTORM WILL BE NEAR... TOLLGATE AND BENNETT MOUNTAIN AROUND 500 PM MDT. MOUNTAIN HOME AROUND 520 PM MDT. MOUNTAIN HOME AIR FORCE BASE...HOT SPRINGS CREEK RESERVOIR... HAMMETT AND C J STRIKE RESERVOIR AROUND 540 PM MDT. PRECAUTIONARY/PREPAREDNESS ACTIONS... WHEN SAFE TO DO SO...PLEASE RELAY STORM REPORTS TO THE NATIONAL WEATHER SERVICE IN BOISE IDAHO VIA LOCAL LAW ENFORCEMENT...OR NWS BOISE FACEBOOK AND TWITTER ACCOUNTS. && LAT...LON 4334 11580 4333 11541 4288 11538 4288 11588 TIME...MOT...LOC 2248Z 356DEG 14KT 4328 11562 SP
The Boise radar (KCBX), 47 km away, was scanning. The volume nearest the first event began at 23:30 UTC.
1 hail. Local standard time, as filed.
Elmore County deputy reported quarter sized hail near Immigrant Road and Canyon Creek Road.
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: 536896.