Delaware Storm & Severe Weather History
Since 1996, Delaware has logged 4,543 severe-weather events — about 147 a year — with 31 direct deaths, 323 injuries and $148.8M in reported property damage.
By event type
Thunderstorm Wind9051 d$5.1M
Strong Wind5051 d$1.8M
Winter Weather425——
Heavy Rain359——
Flash Flood2544 d$31.9M
Heat2168 d—
High Wind216—$12.7M
Drought207——
Coastal Flood193—$54.7M
Flood167—$600K
Dense Fog145——
Lightning144—$6.3M
Hail125—$100K
Winter Storm1015 d$14.3M
Cold/Wind Chill891 d—
Heavy Snow88——
Events by year
19962026
Notable events (29)
Events with deaths, major damage, or a strong tornado — deadliest first.
Flash FloodSeptember 16, 1999
New Castle · 2 killed · 1 injured · $8.0M damage
Flash FloodAugust 27, 2011
New Castle · 2 killed ·
Winter StormFebruary 25, 2007
New Castle · 2 killed ·
HeatAugust 1, 2006
Kent · 2 killed ·
HeatJuly 4, 1999
New Castle · 2 killed · 5 injured ·
HeatJuly 4, 1999
Inland Sussex · 2 killed ·
Winter StormFebruary 9, 2010
New Castle · 1 killed · $3.0M damage
Winter StormFebruary 9, 2010
Inland Sussex · 1 killed · $1.5M damage
Strong WindDecember 1, 2004
Inland Sussex · 1 killed · 1 injured · $8K damage
Thunderstorm WindJune 30, 2025
New Castle · 1 killed · 1 injured ·
Rip CurrentSeptember 3, 2023
Delaware Beaches · 1 killed ·
Tornado (EF3)April 1, 2023
Sussex · 1 killed ·
HeatJune 18, 2014
Inland Sussex · 1 killed ·
Excessive HeatJuly 15, 2013
New Castle · 1 killed ·
Winter StormFebruary 13, 2007
New Castle · 1 killed ·
Extreme Cold/Wind ChillFebruary 6, 2007
New Castle · 1 killed · 1 injured ·
Extreme Cold/Wind ChillFebruary 6, 2007
Kent · 1 killed · 1 injured ·
Extreme Cold/Wind ChillFebruary 6, 2007
Delaware Beaches · 1 killed · 1 injured ·
Extreme Cold/Wind ChillFebruary 6, 2007
Inland Sussex · 1 killed · 1 injured ·
Cold/Wind ChillJanuary 26, 2007
New Castle · 1 killed ·
Rip CurrentSeptember 5, 2005
Sussex · 1 killed ·
Rip CurrentSeptember 29, 2002
Sussex · 1 killed ·
Rip CurrentAugust 25, 2001
Sussex · 1 killed ·
Rip CurrentAugust 23, 1998
Sussex · 1 killed ·
HeatJune 25, 1998
New Castle · 1 killed ·
Coastal FloodNovember 12, 2009
Delaware Beaches · $40.0M damage
Flash FloodSeptember 15, 2003
New Castle · 1 injured · $16.1M damage
High SurfJuly 11, 2008
Delaware Beaches · 55 injured ·
Heavy SnowJanuary 20, 2000
New Castle · 30 injured ·
Source: NOAA/NCEI Storm Events Database. Counts are every logged event since 1996; the "notable" list is filtered to events with fatalities, major damage or a strong tornado. Damage is the reporting office's estimate. A record of past weather is not a forecast. See About the Data.