Idaho, 2024Flash Flood in Idaho, June 30, 2024
June 30, 2024 · NWS MSO · 1 event in 1 county or zone
Flooding occurred along the Salmon River Road as brief but intense rainfall occurred.
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- Deaths
- 0
- Injuries
- 0
- Property damage
- $250,000
- Crop damage
- None recorded
- Events
- 1
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.
Flooding occurred along the Salmon River Road as brief but intense rainfall occurred.
What forecasters said that day
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 Missoula, MT wrote its last area forecast discussion before the first event at Jun 30, 12:46 PM MST, 2 hours 39 minutes earlier.
Area forecast discussion, Jun 30, 12:46 PM MST, 2 hours 39 minutes before
Area Forecast Discussion
National Weather Service Missoula MT
146 PM MDT Sun Jun 30 2024
...5 PERCENT PROBABILITY OF SEVERE WIND AND HAIL ACROSS SOUTHWEST
MONTANA...LEMHI COUNTY IDAHO THROUGH THIS EVENING...
.DISCUSSION...
The biggest weather impact in the near term will be occurrence of
thunderstorms across the Northern Rockies throughout the remainder
of today. Southwest Montana and Lemhi County Idaho have a 5 percent
probability of damaging hail (greater than 1 inch diameter) and
damaging wind (60 mph or greater) through sunset this evening.
Otherwise through Independence Day, cool, showery, and breezy
conditions will remain in place across the Northern Rockies. Daytime
temperatures will be running generally 5-10 degrees below the
seasonal average through Thursday.
The next most significant weather impact is anticipated Friday
through the weekend, when 60-70 percent of weather models and their
ensembles suggest a very warm ridge of high pressure moving over the
Northern Rockies. Population centers across the region are projected
to warm 10-20 degrees above the seasonal average (90-105F). Now
would be a good time to ensure that you have a reliable way to avoid
or mitigate the heat. Water, shade, and air circulation are crucial
for avoiding adverse health effects from heat.
&&
.AVIATION...Thunderstorms will be present across the Northern
Rockies air space through 01/0600Z. There is a roughly 50 percent
probability of lightning across northwest/southwest Montana and
over Lemhi County in central Idaho during this time. Also, there
is a 5 percent probability of large hail and thunderstorm wind
gusts exceeding 50 knots for southwest Montana and Lemhi County
Idaho (including KBTM and KSMN). Terrain obscurations from low
ceilings will be common during this time as well. Ceilings will
steadily rise and obscurations lessen significantly after
01/0600Z.
&&
.MSO WATCHES/WARNINGS/ADVISORIES...
MT...None.
ID...None.
&&
Flash Flood, Lemhi
- When
- June 30, 3:25 PM MST to 5:00 PM MST
- Where
- Lemhi County, 12.98 mi WSW of Shoup to 13.03 mi WSW of Shoup
- Cause
- Heavy Rain
- Property damage
- $250,000
- Reported by
- Department of Highways
- Coordinates
- 45.310, -114.518
Flash flooding and mudslides occurred along Salmon River Road from just above Ebenezer Campground to just below Owl Creek. Radar estimates of up to 1.25 inches of rain fell over a half hour period across the southern half of the Owl Creek Basin. There were three major slides along the Salmon River Road, near Poverty Flat, Skull Gulch, and one roughly 0.3 miles in length where the road bank collapsed into the river. The Skull Gulch slide destroyed at least one outbuilding. There were also 30 to 50 additional small slides across the Salmon River Road that didn't cause structural damage.
- Flash Flood
- Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
- Hail and Damaging Winds in Maryland, June 30, 20241 death · $751,000 · 1.25 in hail · 24 events
- Damaging Winds in New York, June 30, 20241 death · 1 injured · $171,000 · 78 kt wind · 10 events
- Rip Current in Illinois, June 30, 20241 death · 3 injured · 1 event
- Lightning Strike in Florida, June 30, 20241 death · 1 event
- Hail and Damaging Winds in Pennsylvania, June 30, 2024$41,000 · 1 in hail · 13 events
- Damaging Winds in Pennsylvania, June 30, 2024$50,000 · 52 kt wind · 8 events
- Hail and Damaging Winds in Virginia, June 30, 2024$35,000 · 1 in hail · 13 events
- Flash Flooding and Damaging Winds in Connecticut, June 30, 2024$21,000 · 52 kt wind · 18 events
- Damaging Winds in Virginia, June 30, 2024$30,000 · 60 kt wind · 8 events
- Hail and Damaging Winds in Wyoming, June 30, 2024$25,000 · 1.5 in hail · 8 events
- Damaging Winds in New Jersey, June 30, 202453 kt wind · 25 events
- Damaging Winds in New Mexico, June 30, 2024$25,000 · 74 kt wind · 5 events
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: 1178603.