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Jasper County, Iowa severe weather history spans 577 recorded events between 1955 and 2025. The dominant hazard is hail, accounting for 38.1% of all recorded events. It ranks #647 nationally and #22 in Iowa.
577
Recorded events
2
Direct deaths
6
Direct injuries
$64.5M
Property damage
The record
What the Jasper County, Iowa severe weather history record shows
Across the archive, Jasper County, Iowa severe weather history averages 8.2 recorded events a year. The busiest stretch on record is the 2000s, with 206 events logged in that decade alone. Roughly 51 events fall before 1990 and 526 from 1990 onward — a gap that reflects the expansion of NOAA reporting practice as much as the weather itself.
The deadliest hazard in the Jasper County, Iowa record is tornado, responsible for 2 direct deaths. The costliest is tornado, with $56.6M in reported property damage. In total, 8 distinct hazard types appear in this county archive, each listed with its own dated record below.
By hazard type
Every hazard type recorded in Jasper County
| Hazard | Events | Deaths | Damage | Max | Span |
|---|---|---|---|---|---|
| Hail | 220 | 0 | $2.4M | 4.5 | 1972–2025 |
| Thunderstorm Wind | 189 | 0 | $3.3M | 87 | 1955–2025 |
| Heavy Rain | 70 | 0 | $0 | 0 | 2009–2024 |
| Tornado | 45 | 2 | $56.6M | F4 | 1965–2024 |
| Flood | 23 | 0 | $1.5M | 0 | 1996–2024 |
| Funnel Cloud | 13 | 0 | $0 | 0 | 2008–2024 |
| Flash Flood | 12 | 0 | $635K | 0 | 2008–2024 |
| Lightning | 5 | 0 | $69K | 0 | 2000–2010 |
Decade by decade
Jasper County, Iowa severe weather history by decade
Reporting practice changed over time — early decades are undercounted, not calmer.
Tornado tracks
Paths crossing this county
50 mapped tornado paths intersect this county: 40 touched down inside it and 10 crossed in from a neighbouring county. This comes from path geometry, not county-tagged reports.
| Date | Scale | Deaths | Injuries | Path length | Origin |
|---|---|---|---|---|---|
| 2022-03-05 | EF4 | 6 | 5 | 70.6 mi | Crossed in |
| 1986-09-28 | EF4 | 0 | 0 | 20.0 mi | Crossed in |
| 1978-09-16 | EF3 | 6 | 45 | 31.8 mi | Crossed in |
| 1999-04-08 | EF3 | 0 | 5 | 39.0 mi | Crossed in |
| 1966-10-14 | EF3 | 0 | 0 | 29.5 mi | Touched down here |
| 2022-03-05 | EF2 | 0 | 0 | 17.3 mi | Touched down here |
| 2007-09-30 | EF2 | 0 | 0 | 21.9 mi | Crossed in |
| 1973-06-04 | EF2 | 0 | 0 | 1.3 mi | Touched down here |
| 1969-06-11 | EF2 | 0 | 0 | 1.0 mi | Touched down here |
| 1968-04-03 | EF2 | 0 | 0 | 5.2 mi | Touched down here |
Significant events
Deadliest events on record in Jasper County
| Date | Type | Location | Deaths | Injuries | Damage |
|---|---|---|---|---|---|
| Sep 17, 1978 | Tornado | 2 | 2 | $250K | |
| Jun 6, 2008 | Tornado | REASNOR | 0 | 2 | $250K |
| Apr 27, 2024 | Tornado | MONROE | 0 | 1 | $250K |
| Apr 8, 1999 | Tornado | PRAIRIE CITY | 0 | 1 | $1.0M |
From the record
What the reports say
Written by National Weather Service staff at the time of the event · public domain
This tornado developed from the same supercell that produced the Winterset to Newton tornado. It remained in rural areas of central and eastern Jasper county downing power poles and trees along its path. Machine sheds were destroyed at a residence along East 116th Street North with additional damage to outbuildings along East 132nd Street North. The tornado passed just west and north of the hamlet of Newburg before exiting the county into Poweshiek county just south of North 99th Avenue East.
Jasper County EMA reported a path of damage starting just east of Monroe impacting several rural homesteads. Much of the damage was to trees and outbuildings with a few smaller sheds being destroyed. Otherwise, the bulk of the path was across rural farmland between Monroe and Reasnor in southern Jasper County.
An air exchanger on the rooftop was ripped off. Around one quarter of the roof of the gym of the Lynnville-Sully school was peeled back with a section of the roof thrown 50 to 100 feet to the east of the building, causing some tree damage. One window was blown out.
Context
Risk, population and federal disasters
Relatively Low
FEMA NRI risk rating
37,954
Population (ACS)
$186K
Median home value
18
Federal declarations
| Declared | Incident | Title | Type |
|---|---|---|---|
| May 24, 2024 | Severe Storm | SEVERE STORMS, TORNADOES, AND FLOODING | DR |
| Aug 17, 2020 | Severe Storm | SEVERE STORMS | DR |
| Mar 23, 2020 | Biological | COVID-19 PANDEMIC | DR |
| Mar 13, 2020 | Biological | COVID-19 | EM |
| Mar 23, 2019 | Flood | SEVERE STORMS AND FLOODING | DR |
| Aug 5, 2014 | Severe Storm | SEVERE STORMS, TORNADOES, STRAIGHT-LINE WINDS, AND FLOODING | DR |
Within the county
Most affected places
- Newton 128
Quick answers
Frequently asked
How many severe weather events have been recorded in Jasper County, Iowa?
577 events are on record between 1955 and 2025, causing 2 direct deaths and $64.5M in property damage.
What is the most common severe weather hazard in Jasper County?
Hail, with 220 recorded events — 38.1% of everything in the archive for this county.
How many tornadoes have crossed Jasper County?
50 mapped tornado paths intersect the county boundary; 40 of them touched down inside it. This is derived from path geometry, not county-tagged reports.
How many federal disaster declarations cover Jasper County?
18 federal disaster declarations from FEMA include Jasper County, each tied to a specific incident period.
How risky is Jasper County compared with the rest of the country?
FEMA's National Risk Index rates Jasper County as relatively low risk, placing it in the 44 percentile of its state for expected annual loss.
Where does the Jasper County, Iowa severe weather history data come from?
Every figure is drawn from United States federal public-domain records: NOAA/NCEI Storm Events for the event archive, NOAA SPC SVRGIS for mapped tornado paths, FEMA for disaster declarations and risk ratings, and the U.S. Census for population context. Dates are shown in UTC and recent entries may still be revised by NOAA.
Nearby
Neighbouring counties
- Jackson County 329
- Jefferson County 256
- Iowa County 368
- Johnson County 652
- Ida County 262
- Jones County 491
Cite this page
“Jasper County, Iowa.” Severe Weather History. severeweatherhistory.com/county/iowa/jasper-county/ · Data: NOAA/NCEI, FEMA, U.S. Census — public domain.