Federal records document 113 natural disaster events in the Grafton, IA area (ZIP 50440). These include 41 blizzards, 34 hailstorms, and 22 floods. Total documented property damage amounts to $22.2M. A total of 3 injuries have been reported across all events.
With 41 recorded incidents (36% of all events), blizzards are the leading natural hazard for this ZIP code. Of these, 19 (46%) 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. The most recent recorded blizzard occurred on Feb 1, 2015.
There have been 34 recorded hailstorms in this area, representing 30% of all disaster events. Hail-related events have caused a combined $218K in documented property damage. The most recent recorded hailstorm occurred on Sep 22, 2025.
There have been 22 recorded floods in this area, representing 19% of all disaster events. Of these, 14 (64%) 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 $5.2M in documented property damage. The most recent recorded flood occurred on Aug 27, 2021.
Grafton has experienced 7 tornadoes on record. Of these, 4 (57%) 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 5/5 (extreme). Tornado-related events have caused a combined $7.8M in documented property damage. The most recent recorded tornado occurred on Apr 12, 2022.
Grafton 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.
Grafton has experienced 4 severe wind events on record. Wind-related events have caused a combined $525K in documented property damage. The most recent recorded severe wind event occurred on Dec 15, 2021.
The most significant disaster event on record for Grafton was Flash Flood on Aug 27, 2021, which caused $3.5M in property damage. Another major event was Frost/Freeze (Sep 15, 2011), causing $2.7M in damages. Frost/Freeze on Oct 10, 2009 also caused significant damage ($2.5M).
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Based on federal and state records, ZIP code 50440 has experienced 113 natural disaster events. The hazard types affecting this area include blizzards (41 events), hailstorms (34 events), floods (22 events), tornadoes (7 events), extreme cold events (4 events), severe wind events (4 events), and extreme heat event (1 event). The primary hazard is blizzards, which account for 36% of all recorded events.
Blizzards are the most frequently recorded hazard in Grafton, IA, with 41 events documented. These events have caused a combined $1.3M in property damage.
Yes, Grafton (ZIP 50440) has 22 recorded flood events. These floods have caused $5.2M in total property damage. The most recent flood on record occurred on Aug 27, 2021.
Grafton has 7 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 $7.8M. The most recent tornado was recorded on Apr 12, 2022.
The most damaging natural disaster on record for ZIP code 50440 was Flash Flood, which occurred on Aug 27, 2021. This event caused $3.5M in documented property damage. It was rated at severity level 5/5.
Natural disasters have caused a documented total of $22.2M in property damage in the Grafton, IA area (ZIP 50440). 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 →