Heavy Rain in Delaware

Events

359

Deaths

0

Injuries

1

Damage

None recorded

• Tropical Storm and Storm Surge in Delaware, September 18 to 20, 2003$27 million · 50 kt wind · 13 eventsTropical Storm Isabel caused tidal flooding up Delaware Bay, heavy rain and strong power outage producing winds. Isabel made landfall as a hurricane near Drum Inlet, North Carolina around 100 p.m. EDT on the 18th and weakened as it tracked farther inland.
• Coastal Flood and High Wind in Delaware, February 4 to 9, 19985 injured · $1.7 million · 70 kt wind · 8 eventsThe strongest northeaster of the winter battered Kent and Sussex Counties with damaging winds, severe coastal flooding, extensive beach erosion, several dune breaches and heavy rain. A state of emergency was declared for all or parts of Sussex County from 7 a.m.
• Flash Flood and Flooding in Delaware, September 29 to 30, 2016124 eventsA slow moving frontal boundary coupled with tropical moisture advecting northward ahead of the front led to rounds of heavy showers in Delaware from the 27th into the next couple of days.
• Flood and Coastal Flood in Delaware, September 1 to 5, 2006$850,000 · 54 kt wind · 17 eventsThe combination of the remnants of Tropical Storm Ernnesto and a large high pressure system over eastern Canada produced heavy rain and flooding, strong and in some cases damaging winds, tidal flooding and beach erosion in Delaware.
• Coastal Flood and High Wind in Delaware, January 28 to 29, 1998$1.3 million · 71 kt wind · 8 eventsAn intense northeaster pounded Kent and Sussex Counties with tidal flooding, beach erosion, strong winds and heavy rain on the 28th. Conditions were progressively worse closer to the coast in Kent and Sussex Counties. Severe coastal flooding was reported in Sussex County.
• Hail and Damaging Wind in Delaware, August 10, 2008$100,000 · 1 in hail · 6 eventsAn unusually strong for August upper air disturbance helped trigger numerous strong to severe thunderstorms across Delaware.
• Flooding and Heavy Rain in Delaware, July 28 to 29, 201734 eventsA rare summertime Nor'easter tracked just offshore producing heavy rain, thunderstorms and wind. Coastal flooding and beach erosion also occurred.
• Heavy Rain in Delaware, September 19 to 20, 201632 eventsThe remnants of tropical storm Julia and a frontal boundary interacted leading to several rounds of rainfall over the region.
• Lightning Strike and Heavy Rain in Delaware, August 14, 20081 injured · $25,000 · 2 eventsPulse type thunderstorms produced lightning damage and heavy rain across New Castle County on the evening of the 14th.
• Flooding and Heavy Rain in Delaware, August 7, 201717 eventsShowers and Thunderstorms developed along a north of a warm frontal boundary. With a moist environment in place, the storms produced heavy rain and flash flooding.
• Flash Flooding and Flood in Delaware, July 22 to 24, 2017$10 · 17 eventsA stalled frontal boundary was the focus for several rounds of thunderstorms that produced damaging winds and flooding in spots.
• Flash Flooding and Flooding in Delaware, July 6 to 7, 201716 eventsA stationary frontal boundary draped across the Delmarva lead to a period of heavy rainfall during the afternoon and evening of July 6th, particularly over northern Delaware and northeast Maryland.
• Flooding and Heavy Rain in Delaware, December 9 to 10, 20091 injured · 3 eventsAn intense low pressure system that moved through the Great Lakes on the 9th produced a strong southerly flow of moist air from the Gulf of Mexico and Atlantic Ocean. Rain began falling during the evening of the 8th and ended by Noon EST on the 9th.
• Damaging Wind and Lightning Strike in Delaware, August 5 to 6, 2022$1,000 · 50 kt wind · 10 eventsScattered thunderstorms developed across the Delmarva peninsula producing some isolated heavy rainfall.
• Flash Flooding and Lightning Strike in Delaware, July 13, 2016$4,000 · 8 eventsA stationary front was located across the region on the 13th. This led to the development of showers and thunderstorms during the afternoon and evening hours. These thunderstorms produced heavy rainfall with a few reports of flash flooding.
• Coastal Flood and High Surf in Delaware, November 22 to 23, 2006$10,000 · 7 eventsA northeaster brought heavy rain, strong winds, rough surf and tidal flooding to Delaware on the 22nd and 23rd (Thanksgiving Day) and hit Sussex County the hardest. The rain and strong winds arrived together, just before sunrise on the 22nd.
• Coastal Flood and Heavy Rain in Delaware, October 6 to 7, 2006$10,000 · 7 eventsA northeaster brought tidal flooding, heavy rain, strong winds and beach erosion to central and southern Delaware.
• Coastal Flood and Strong Wind in Delaware, November 7 to 9, 19976 eventsA slow moving nor'easter caused strong winds, heavy rain, beach erosion and widespread, but minor, tidal flooding from mid-day on the 7th through the morning of the 9th.
• Flood and Lightning Strikes in Delaware, August 21, 2016$20 · 6 eventsThunderstorms developed near a triple point of a low pressure system. These thunderstorms produced lightning and heavy rainfall as they moved through the region.
• Flood and High Wind in Delaware, October 9, 201651 kt wind · 6 eventsHurricane Matthew tracked up the east coast and interacted with a cold front. This interaction brought increased winds and a period of heavy rain to the region. Rainfall amounts were from two to four inches in Sussex county to around two inches in Kent and New Castle counties.
• Flash Flood and Damaging Wind in Delaware, August 2 to 3, 201752 kt wind · 6 eventsA hot and humid airmass with weak boundaries led to slow moving strong to severe thunderstorms with damaging winds, hail and flooding.
• Flash Flood and Coastal Flood in Delaware, February 23 to 24, 19985 eventsAnother northeaster brought heavy rain and strong winds to Delaware on the 23rd and 24th. The onshore flow also brought some minor tidal flooding during the time of high tide the morning of the 24th.
• Winter Storm and Heavy Rain in Delaware, January 13 to 15, 19995 eventsA very protracted precipitation event affected the Delmarva Peninsula on the 14th and 15th. The region escaped the worst conditions as enough warm air came in before the heavy rain arrived.
• Damaging Wind and Lightning Strike in Delaware, July 28 to 29, 2016$10 · 55 kt wind · 5 eventsA cold frontal boundary moved southward into the region. This led to the development of afternoon showers and thunderstorms. Some of thunderstorms became severe with locally heavy rainfall as well.
• Heavy Rain in Delaware, December 31, 19964 eventsDecember 1996 was one of the wettest Decembers on record for Delaware. Rainfall amounts were about four to five inches above normal. County average monthly totals ranged from 7.4 inches in Sussex County to 8.8 inches in New Castle County.

Heavy Rain everywhereEvery kind of event in Delaware

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.