Government records show 260 natural disaster events affecting the Longmont, CO area (ZIP 80504) — a notably active disaster history. These include 222 hailstorms, 26 tornadoes, and 8 floods. Total documented property damage amounts to $7.2M. These events have resulted in 3 recorded deaths and 14 injuries.
With 222 recorded incidents (85% of all events), hailstorms are the leading natural hazard for this ZIP code. One event reached severity level 4 or 5 on the normalized scale. The highest recorded severity for hail-related events here is 4/5 (severe). Hail-related events have caused a combined $3M in documented property damage. The most recent recorded hailstorm occurred on Aug 10, 2025.
There have been 26 recorded tornadoes in this area, representing 10% of all disaster events. Of these, 2 (8%) were rated at severity level 4 or 5 — the most intense on the normalized scale. The highest recorded severity for tornado-related events here is 4/5 (severe). Tornado-related events have caused a combined $3.4M in documented property damage. The most recent recorded tornado occurred on Jun 7, 2021.
Longmont has experienced 8 floods on record. Of these, 4 (50%) were rated at severity level 4 or 5 — the most intense on the normalized scale. The highest recorded severity for flood-related events here is 5/5 (extreme). Flood-related events have caused a combined $726K in documented property damage. 3 fatalities have been attributed to floods in this area. The most recent recorded flood occurred on Jun 4, 2015.
Longmont has experienced 4 severe wind events on record. The most recent recorded severe wind event occurred on Jun 6, 2020.
The most significant disaster event on record for Longmont was 2" Hail on Jul 20, 2009, which caused $3M in property damage. Another major event was EF1 Tornado (Jun 3, 1981), causing $2.5M in damages. Flood on May 8, 2015 also caused significant damage ($600K).
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Based on federal and state records, ZIP code 80504 has experienced 260 natural disaster events. The hazard types affecting this area include hailstorms (222 events), tornadoes (26 events), floods (8 events), and severe wind events (4 events). The primary hazard is hailstorms, which account for 85% of all recorded events.
Hailstorms are the most frequently recorded hazard in Longmont, CO, with 222 events documented. These events have caused a combined $3M in property damage.
Yes, Longmont (ZIP 80504) has 8 recorded flood events. These floods have caused $726K in total property damage. The most recent flood on record occurred on Jun 4, 2015.
Longmont has 26 recorded tornado events in the historical record. The strongest tornado recorded reached severity level 4/5 on the normalized scale. Total property damage from tornadoes in this area is $3.4M. The most recent tornado was recorded on Jun 7, 2021.
The most damaging natural disaster on record for ZIP code 80504 was 2" Hail, which occurred on Jul 20, 2009. This event caused $3M in documented property damage. It was rated at severity level 3/5.
Natural disasters have caused a documented total of $7.2M in property damage in the Longmont, CO area (ZIP 80504). This figure is based on historical records from FEMA, NOAA Storm Events Database, and USGS, and covers events from the 1950s through the present. Actual damages may be higher, as not all events have complete damage assessments.
Data sourced from FEMA (disaster declarations, NFIP flood claims), NOAA Storm Events Database, USGS Earthquake Hazards Program, and NIFC wildfire records. Historical coverage varies by source, with most records beginning in the 1950s–1970s. Full methodology →