Pennsylvania

Storm History: Chester County, Pennsylvania

805 episodes, 1,678 events since 1953

Every storm the National Weather Service has filed in Chester County, Pennsylvania: floods, hail, damaging wind, tornadoes, winter storms, heat and the rest, with the most serious on record. Events filed by forecast zone count for every county the zone covers.

The record

Events
1,678
Deaths
12
Injuries
93
Damage
$80 million
Episodes
805

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

Open the live radar over Chester County

Every year

From 1996 the record holds 48 kinds of event with each office’s narrative; before that, tornadoes, hail and thunderstorm wind only, and before 1955 tornadoes alone.

By kind of event

Counted under the kind that heads each episode.

Kind of eventEventsDeathsInjuriesDamage
Thunderstorm Wind44638$572,000
Hail32014$1.2 million
Flash Flood25221$54 million
Tornado175234$20 million
Winter Weather133013$50,000
Winter Storm8200
Flood6017$2.9 million
Dense Fog5000
Heavy Rain2610
Excessive Heat2500
Extreme Cold/Wind Chill2100
Lightning2021$787,000
High Wind1700$26,000
Heavy Snow1600
Strong Wind1300$29,000
Heat600
Ice Storm5024
Blizzard300$10
Tropical Storm200$850,000
Wildfire201
Marine High Wind100
Funnel Cloud100
Storm Surge/Tide100
Freezing Fog100

The deadliest

The costliest

Damage within this county, in the dollars of its year.

The largest hail

The largest stone in each episode, which may have fallen in a neighboring county of the same episode.

The strongest tornadoes

Every tornado in Chester County, with its track

Every episode, newest first

Earlier years, state by state:

More

Tornadoes in Chester CountyEvery warning in Chester County since 1986Every county in Pennsylvania

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24.