With 243 documented natural disaster events, ZIP code 50647 in Janesville, IA has a substantial history of natural hazard activity. These include 114 floods, 63 hailstorms, and 40 blizzards. Total documented property damage amounts to $79.5M. A total of 20 injuries have been reported across all events.
The dominant hazard type for Janesville is floods, with 114 recorded events making up 47% of the area's disaster history. Of these, 93 (82%) 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 $42.7M in documented property damage. The most recent recorded flood occurred on May 29, 2019.
Hailstorms account for 26% of the disaster record here, with 63 events documented. Of these, 5 (8%) were rated at severity level 4 or 5 — the most intense on the normalized scale. The highest recorded severity for hail-related events here is 5/5 (extreme). Hail-related events have caused a combined $833K in documented property damage. The most recent recorded hailstorm occurred on Sep 22, 2025.
There have been 40 recorded blizzards in this area, representing 16% of all disaster events. Of these, 18 (45%) 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 $1.2M in documented property damage. The most recent recorded blizzard occurred on Feb 1, 2015.
There have been 12 recorded severe wind events in this area, representing 5% of all disaster events. Wind-related events have caused a combined $685K in documented property damage. The most recent recorded severe wind event occurred on Jul 29, 2025.
Janesville has experienced 9 tornadoes on record. Tornado-related events have caused a combined $27M in documented property damage. The most recent recorded tornado occurred on Jul 14, 2021.
Janesville 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 Janesville was EF2 Tornado on May 25, 2008, which caused $25.2M in property damage. Another major event was Flood (Jun 12, 2010), causing $20M in damages. Frost/Freeze on Sep 15, 2011 also caused significant damage ($2.7M).
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Based on federal and state records, ZIP code 50647 has experienced 243 natural disaster events. The hazard types affecting this area include floods (114 events), hailstorms (63 events), blizzards (40 events), severe wind events (12 events), tornadoes (9 events), extreme cold events (4 events), and extreme heat event (1 event). The primary hazard is floods, which account for 47% of all recorded events.
Floods are the most frequently recorded hazard in Janesville, IA, with 114 events documented. These events have caused a combined $42.7M in property damage.
Yes, Janesville (ZIP 50647) has 114 recorded flood events. These floods have caused $42.7M in total property damage. The most recent flood on record occurred on May 29, 2019.
Janesville has 9 recorded tornado events in the historical record. The strongest tornado recorded reached severity level 3/5 on the normalized scale. Total property damage from tornadoes in this area is $27M. The most recent tornado was recorded on Jul 14, 2021.
The most damaging natural disaster on record for ZIP code 50647 was EF2 Tornado, which occurred on May 25, 2008. This event caused $25.2M in documented property damage. It was rated at severity level 3/5.
Natural disasters have caused a documented total of $79.5M in property damage in the Janesville, IA area (ZIP 50647). 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 →