Nampa, ID Tornado History — 24 Tornadoes Since 1950
How many tornadoes has Nampa, ID had?
Nampa has had 24 tornadoes on record within 25 miles since 1950.
When was the most recent tornado near Nampa?
The most recent tornado within 25 miles of Nampa was an EF0 on May 26, 2023.
When is tornado season in Nampa?
August is historically the peak month for tornadoes near Nampa, with 7 on record. Spring through early summer (April–June) generally sees the highest activity across most of the central and southern United States.
At a Glance
Recent Tornado Activity Near Nampa
The last 20 years of confirmed tornadoes within 25 miles — 2 total, averaging 0.1 per year over this window.
Tornadoes by Decade
Tornadoes by Enhanced Fujita Rating
F0–F5 ratings (pre-2007) are grouped with their EF equivalents. The Enhanced Fujita scale replaced the original Fujita scale in February 2007.
Tornadoes by Month
Have any tornadoes near Nampa been fatal?
No fatalities are on record within 25 miles of Nampa from any of the 24 tornadoes since 1950. NOAA Storm Prediction Center records.
Notable Tornadoes Near Nampa
About Tornadoes in Nampa
This overview was written April 23, 2026. The tornado counts and notable-event figures elsewhere on this page reflect the latest data and may differ from this summary.
Nampa, Idaho has experienced 24 documented tornadoes within a 25-mile radius since 1950, according to the NOAA Storm Prediction Center. These events have been notably weak in intensity, with 20 rated EF0 and just 4 reaching EF1 on the Enhanced Fujita scale, which classifies tornadoes from EF0 (65-85 mph winds) to EF5 (over 200 mph winds). No tornadoes in the area have resulted in fatalities on record, and property damage has remained minimal throughout the seven-decade period of documentation.
Tornado activity near Nampa has increased in recent decades. The 1950s and 1960s saw only three combined events, while the 1980s recorded three tornadoes and the 1990s documented five. The 2000s marked a significant uptick with 11 tornadoes, representing nearly half of all recorded events in the area. The 2020s have thus far added two more tornadoes to the record.
August stands out as the peak month for tornado activity, accounting for 7 of the 24 recorded events. This late-summer concentration differs from the national pattern where tornado activity typically peaks in spring months across much of the United States. The costliest tornado on record occurred on April 24, 1991, when an F0 tornado caused $27,500 in property damage along a 0.2-mile path with a maximum width of 50 yards. The widest tornado, measuring 100 yards across, touched down on August 23, 1956, traveling half a mile and causing just $25 in damage. The longest-track tornado carved a 3.8-mile path on June 2, 1967, though it remained narrow at only 17 yards wide and caused no reported damage.
The most recent tornado occurred on May 27, 2023, when an EF0 event traveled 0.9 miles with a maximum width of just 3 yards. Like the vast majority of tornadoes in the Nampa area, this event resulted in no injuries or property damage, reflecting the generally weak nature of tornado activity in this region of southwestern Idaho.