Mercer storm history
Storm events recorded in Mercer, New Jersey between 1950 and 2025.
1,126
Total events
18
Tornadoes
63
Hail
136
Floods
14
Deaths
$309.0M
Property damage
Most significant events
Strongest tornadoes, deadliest events, and biggest damage in this county. Up to 50 shown.
Widespread flash flooding occurred in Mercer County with numerous road closures and nearly 100 water rescues. There were two flood related fatalities in the county, both in Hopewell Township. Many waterways overflowed their banks including the Assunpink Creek, Stony Brook and the…
In Princeton, a 39-year-old emergency responder died from injuries sustained while investigating a submerged vehicle in flood waters. No one was in the vehicle. In Lawrence Township, a 50-year-old man became trapped in a sewer pipe at Shemin Nurseries and drowned. Flooding along …
A southwesterly flow produced the first 90-degree temperatures of the 2016 season on the 26th. These temperatures, in combination with high relative humidity, caused heat-related stress for more than a dozen middle school students from William Penn Middle School in Lower Makefiel…
Eighty-three homes were damaged by the flooding associated with Lee in Mercer County. Six homes suffered major damage, seventy-two minor damage and five more were affected by flood waters. In Trenton, about 250 people were evacuated from their homes in the Island and Glen Afton s…
The combination of poor drainage, basement and waterway flooding caused a driving nightmare in Mercer County. Many major roadways in the county were flooded and closed in sections including U.S. Routes 1, 130 and 206 and New Jersey State Route 33. There were still about 10 roadwa…
Dense Fog Dense Fog
Several hours of dense fog was reported at Trenton-Mercer Airport.
Winter Weather Winter Weather
Snow and sleet totals ranged from around 0.5-1 in most areas. The highest report was 1.2 from Hopewell. A light glaze of freezing rain/freezing drizzle was also reported across the county.
Winter Storm Winter Storm
Snowfall totals ranged from 6-7. The highest report was 8.4 from Mercerville.
Dense Fog Dense Fog
Several hours of dense fog was observed at Trenton-Mercer Airport.
Dense Fog Dense Fog
Dense fog was reported for several hours at Trenton-Mercer Airport.
Dense Fog Dense Fog
Dense fog was reported for several hours at Trenton-Mercer Airport.
Excessive Heat Excessive Heat
The heat index at Somerset Airport reached 112 degrees, at both Doylestown Airport and South Jersey Regional Airport it reached 106 degrees, at McGuire Air Force Base it reached 107 degrees, and at Monmouth Executive Airport it reached 105 degrees.
Thunderstorm Wind Thunderstorm Wind
Trees and lines down throughout Ewing. Time estimated from radar.
Thunderstorm Wind Thunderstorm Wind
A 58 mph wind gust occurred at Trenton Mercer Airport. Time given in report.
Thunderstorm Wind Thunderstorm Wind
Trees and powerlines down across Route 1. Time estimated from radar.
Thunderstorm Wind Thunderstorm Wind
As of 6:48pm, theres a Downed tree on US 1 southbound North of Franklin Corner Rd/Bakers Basin Rd in Lawrence Twp. All lanes closed. Time estimated from radar.
Thunderstorm Wind Thunderstorm Wind
Multiple reports of trees and wires down. Time estimated from radar.
Thunderstorm Wind Thunderstorm Wind
Multiple reports of trees and wires down. Time estimated from radar.
Thunderstorm Wind Thunderstorm Wind
Multiple reports of trees and wires down. Time estimated from radar.
Thunderstorm Wind Thunderstorm Wind
Multiple reports of trees and wires down. Time estimated from radar.
Excessive Heat Excessive Heat
Three days of high heat and humidity brought extreme heat indices. The heat index peaked at 109 degrees on June 23rd, 105 degrees on June 24th and 106 degrees on June 25th, all measured at Trenton-Mercer Airport.
Thunderstorm Wind Thunderstorm Wind
Several large tree limbs downed with damage. Time estimated from radar.
Thunderstorm Wind Thunderstorm Wind
Tree downed in Banchoff Park. Time estimated from radar.
Thunderstorm Wind Thunderstorm Wind
Multiple trees and wires down. Time estimated from radar.
Dense Fog Dense Fog
Dense fog with visibility 1/4 mile or less was observed for several hours at Trenton-Mercer Airport.
Dense Fog Dense Fog
Dense fog was observed for several hours at Trenton-Mercer Airport.
High Wind High Wind
ASOS at Trenton-Mercer Airport measured a gust of 60 mph.
Winter Weather Winter Weather
Light snowfall occurred with totals around 2-2.5. The highest reported total was 2.5 in Robbinsville Twp, Hamilton Twp, and Hamilton Square.
Winter Weather Winter Weather
A wintry mix of sleet, freezing rain, and some snow occurred. The greatest snow and sleet report was 1.5 in East Windsor Twp. The greatest freezing rain measurement was 0.24 from the Trenton Mercer Airport.
Winter Weather Winter Weather
A wintry mix of sleet, freezing rain, and some snow occurred. The greatest snow and sleet report was 1.7 in Woodbridge. No freezing rain measurements were received, however surrounding reports indicate around 0.1 or less occurred across the county.
Winter Weather Winter Weather
A wintry mix of snow, sleet, and freezing rain occurred. The greatest snow and sleet total was 0.3 in Hamilton Twp. The greatest ice measurement was 0.15 from the Trenton Mercer Airport.
Winter Weather Winter Weather
Light snowfall with totals ranging from 2-4 occurred in Mercer County. The highest report was 4.3 from Woodsville.
Dense Fog Dense Fog
Dense fog was observed for several hours at Trenton-Mercer Airport.
Winter Weather Winter Weather
Light snowfall accumulations occurred with totals ranging from around 2-3 across much of the county. The highest snowfall report was 3.5 in Hopewell Twp.
Dense Fog Dense Fog
Trenton-Mercer Airport reported several hours of dense fog from late on December 9th into December 10th.
Events by year
| Year | Events | Tornadoes |
|---|---|---|
| 2025 | 28 | 0 |
| 2024 | 24 | 1 |
| 2023 | 38 | 3 |
| 2022 | 21 | 0 |
| 2021 | 46 | 3 |
| 2020 | 35 | 0 |
| 2019 | 44 | 1 |
| 2018 | 28 | 0 |
| 2017 | 13 | 0 |
| 2016 | 25 | 0 |
| 2015 | 30 | 0 |
| 2014 | 37 | 0 |
| 2013 | 32 | 0 |
| 2012 | 53 | 0 |
| 2011 | 37 | 1 |
| 2010 | 36 | 0 |
| 2009 | 40 | 0 |
| 2008 | 38 | 0 |
| 2007 | 41 | 0 |
| 2006 | 29 | 0 |
| 2005 | 39 | 0 |
| 2004 | 33 | 0 |
| 2003 | 44 | 1 |
| 2002 | 37 | 0 |
| 2001 | 37 | 0 |
| 2000 | 38 | 0 |
| 1999 | 45 | 0 |
| 1998 | 44 | 0 |
| 1997 | 27 | 0 |
| 1996 | 46 | 1 |
| 1995 | 4 | 0 |
| 1994 | 7 | 0 |
| 1992 | 2 | 1 |
| 1991 | 2 | 0 |
| 1990 | 5 | 0 |
| 1989 | 5 | 1 |
| 1988 | 3 | 1 |
| 1987 | 8 | 0 |
| 1986 | 1 | 0 |
| 1985 | 3 | 0 |
| 1983 | 1 | 0 |
| 1981 | 1 | 0 |
| 1980 | 3 | 0 |
| 1977 | 5 | 0 |
| 1976 | 1 | 0 |
| 1974 | 3 | 0 |
| 1970 | 1 | 0 |
| 1967 | 1 | 1 |
| 1962 | 1 | 1 |
| 1961 | 1 | 0 |
| 1960 | 1 | 1 |
| 1958 | 1 | 1 |
| 1955 | 1 | 0 |