Federal records document 191 natural disaster events in the Allison, IA area (ZIP 50602). These include 64 hailstorms, 57 floods, and 47 blizzards. Total documented property damage amounts to $22.8M. These events have resulted in 1 recorded death and 8 injuries.
The dominant hazard type for Allison is hailstorms, with 64 recorded events making up 34% of the area's disaster history. One event reached severity level 4 or 5 on the normalized scale. The highest recorded severity for hail-related events here is 5/5 (extreme). Hail-related events have caused a combined $752K in documented property damage. The most recent recorded hailstorm occurred on Aug 15, 2025.
Floods account for 30% of the disaster record here, with 57 events documented. Of these, 42 (74%) 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 $8.4M in documented property damage. The most recent recorded flood occurred on Sep 20, 2018.
There have been 47 recorded blizzards in this area, representing 25% of all disaster events. Of these, 19 (40%) were rated at severity level 4 or 5 — the most intense on the normalized scale. The highest recorded severity for winter storm events here is 5/5 (extreme). Winter storm events have caused a combined $1.3M in documented property damage. 1 fatality has been attributed to blizzards in this area. The most recent recorded blizzard occurred on Feb 1, 2015.
Allison has experienced 10 tornadoes on record. One event reached severity level 4 or 5 on the normalized scale. The highest recorded severity for tornado-related events here is 5/5 (extreme). Tornado-related events have caused a combined $3.6M in documented property damage. The most recent recorded tornado occurred on Jul 14, 2021.
Allison has experienced 8 severe wind events on record. Wind-related events have caused a combined $1.6M in documented property damage. The most recent recorded severe wind event occurred on Jun 16, 2014.
Allison has experienced 4 extreme cold events on record. Of these, 4 (100%) were rated at severity level 4 or 5 — the most intense on the normalized scale. The highest recorded severity for cold-related events here is 5/5 (extreme). Cold-related events have caused a combined $7M in documented property damage. The most recent recorded extreme cold event occurred on Apr 11, 2012.
The most significant disaster event on record for Allison was Frost/Freeze on Sep 15, 2011, which caused $2.7M in property damage. Another major event was Frost/Freeze (Oct 10, 2009), causing $2.5M in damages. EF4 Tornado on Sep 1, 1961 also caused significant damage ($2.5M).
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Based on federal and state records, ZIP code 50602 has experienced 191 natural disaster events. The hazard types affecting this area include hailstorms (64 events), floods (57 events), blizzards (47 events), tornadoes (10 events), severe wind events (8 events), extreme cold events (4 events), and extreme heat event (1 event). The primary hazard is hailstorms, which account for 34% of all recorded events.
Hailstorms are the most frequently recorded hazard in Allison, IA, with 64 events documented. These events have caused a combined $752K in property damage.
Yes, Allison (ZIP 50602) has 57 recorded flood events. These floods have caused $8.4M in total property damage. The most recent flood on record occurred on Sep 20, 2018.
Allison has 10 recorded tornado events in the historical record. The strongest tornado recorded reached severity level 5/5 on the normalized scale. Total property damage from tornadoes in this area is $3.6M. The most recent tornado was recorded on Jul 14, 2021.
The most damaging natural disaster on record for ZIP code 50602 was Frost/Freeze, which occurred on Sep 15, 2011. This event caused $2.7M in documented property damage. It was rated at severity level 5/5.
Natural disasters have caused a documented total of $22.8M in property damage in the Allison, IA area (ZIP 50602). 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 →