Severe thunderstorms produced large hail across parts of the Magic Valley.
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 BOI wrote it up.
Severe thunderstorms produced large hail across parts of the Magic Valley.
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 Sep 9, 1:17 PM MST, 4 hours 39 minutes earlier.
Area Forecast Discussion National Weather Service Boise ID 217 PM MDT Mon Sep 9 2019 .SHORT TERM...Tonight through Wednesday...An upper level low will move across the area in the short term. This will continue to provide conditions favorable for showers and thunderstorms. A shortwave trough will move northeast on the front side of the upper low and travel across the area Tue morning, bringing an increase in precipitation. As the main low nears Tue afternoon, showers and storms will continue through the afternoon and well into the evening. As the axis of the upper low passes by early Wed morning, showers will decrease in our Oregon zones. The West Central and Boise mountains, along with the higher terrain south of the Snake River, will see the bulk of the activity Wed afternoon. High temps will remain below normal by about 10 degrees through Wed, while low temps will be just a couple of degrees cooler than normal. Winds will generally be light, but will increase to 10 to 20 mph out of the NW Wed afternoon. .LONG TERM...Wednesday night through Saturday...Lingering showers for central Idaho to begin the period as the upper level trough continues to push eastward and our short wave ridge builds in from the west. Mostly clear and mild conditions will prevail for the end of the week. Temperatures hover right around normal for this time period. Saturday night through Monday night...Clear and breezy across the region during the first half of the period as a retreating drier flow is temporarily in control. However, look for deteriorating conditions soon after as a moist, Pacific low drops in from the northwest starting early Sunday morning. Showers are expected to spread across the forecast area and linger throughout the remainder of the period (Monday night). Breezy winds are expected to intensify on Sunday with a tightening pressure gradient to gusty levels in some locations. By Monday afternoon as this system's trough axis nears, the gradient will loosen causing winds to taper down to mild breezy levels. High and low temperatures are expected to cool down to near normals. && .AVIATION...Generally VFR. Areas of MVFR/IFR conditions with mountain obscurations expected within rain showers. Increased coverage of rain showers with isolated thunderstorms will continue through Monday afternoon. Surface winds, west-northwest 5-10kts becoming light and variable by late evening and into the overnight hours. Winds aloft to 10k feet MSL, southwest 20-25kts. && .BOI WATCHES/WARNINGS/ADVISORIES... ID...None. OR...None. && www.weather.gov/Boise www.facebook.com/NWSBoise www.twitter.com/NWSBoise SHORT TERM...SP LONG TERM....JC/WH AVIATION.....JC
Special Weather Statement National Weather Service Boise ID 615 PM MDT Mon Sep 9 2019 IDZ016-030-100045- Southern Twin Falls County ID-Western Magic Valley ID- 615 PM MDT Mon Sep 9 2019 ...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL TWIN FALLS COUNTY UNTIL 645 PM MDT... At 614 PM MDT, Doppler radar was tracking a strong thunderstorm over Roseworth, or 24 miles southwest of Twin Falls, moving northeast at 35 mph. Half inch hail and wind gusts up to 40 mph will be possible with this storm. This strong thunderstorm will be near... Twin Falls, Filer and Magic Valley Regional Airport around 640 PM MDT. PRECAUTIONARY/PREPAREDNESS ACTIONS... When safe to do so, please relay storm reports to the National Weather Service in Boise via local law enforcement, or National Weather Service Boise Facebook and Twitter accounts. && LAT...LON 4226 11490 4239 11502 4263 11456 4245 11437 TIME...MOT...LOC 0014Z 238DEG 30KT 4236 11487
Special Weather Statement National Weather Service Boise ID 648 PM MDT Mon Sep 9 2019 IDZ016-030-100130- Southern Twin Falls County ID-Western Magic Valley ID- 648 PM MDT Mon Sep 9 2019 ...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL TWIN FALLS AND CENTRAL JEROME COUNTIES UNTIL 730 PM MDT... At 647 PM MDT, Doppler radar was tracking a strong thunderstorm 7 miles south of Filer, or 11 miles southwest of Twin Falls, moving northeast at 30 mph. Half inch hail and wind gusts up to 40 mph will be possible with this storm. This strong thunderstorm will be near... Filer and Magic Valley Regional Airport around 700 PM MDT. Twin Falls around 710 PM MDT. Kimberly and Hansen around 720 PM MDT. Eden, Hazelton and Minidoka National Monument around 730 PM MDT. PRECAUTIONARY/PREPAREDNESS ACTIONS... When safe to do so, please relay storm reports to the National Weather Service in Boise via local law enforcement, or National Weather Service Boise Facebook and Twitter accounts. && LAT...LON 4234 11465 4249 11478 4280 11423 4258 11404 TIME...MOT...LOC 0047Z 237DEG 27KT 4246 11463
The Pocatello radar (KSFX), 170 km away, was scanning. The volume nearest the first event began at 00:55 UTC.
6 hail. Local standard time, as filed.
The NWS received a call from a citizen reporting 1.25 inch hail.
A trained spotter reported one inch hail near Twin Falls.
A trained spotter reported one inch hail near Twin Falls.
A picture of large hailstones in the Kimberly and Hanson areas was posted on Twitter.
A trained spotter reported one inch hail near Eden.
One inch hail was reported at North Wilson, North of Hazelton, by a BLM fire crew.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Idaho in 2019Every state in 2019This day in weather historyWarnings in Idaho, September 2019
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: 851181, 851183, 851184, 851186, 851187, 851188.