Delaware, 2016

Flash Flood and Flooding in Delaware, September 29 to 30, 2016

September 29 to 30, 2016 · NWS PHI · 124 events in 3 counties and zones

A 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. Numerous occurrences of both nuisance and flash flooding were also reported, a main example being water damage to a building in Denton.

Where it happened

Every event with a place to put it. Tap one for its entry below.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

Open the live radar over this ground

The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
124

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.

What happened

The episode as NWS PHI wrote it up.

A 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. Numerous occurrences of both nuisance and flash flooding were also reported, a main example being water damage to a building in Denton. Quite a few weekend events were moved or postponed including high school football games, a local music festival, craft fair, A NASCAR race and a town festival. Several trees were also taken down due to soft ground conditions.

What forecasters said that day

The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Philadelphia/Mount Holly wrote its last area forecast discussion before the first event at Sep 28, 8:22 PM EST, 5 hours 8 minutes earlier.

Area forecast discussion, Sep 28, 8:22 PM EST, 5 hours 8 minutes before
Area Forecast Discussion
National Weather Service Mount Holly NJ
922 PM EDT Wed Sep 28 2016

.SYNOPSIS...
An area of low pressure will move across the Ohio Valley and
combine with another low across the central and southern
Appalachians Thursday into Friday. A cold front will cross the
region around Sunday.  High pressure is then expected to build
to our north into early next week.

&&

.NEAR TERM /UNTIL 6 AM THURSDAY MORNING/...
Short term hires models are struggling this evening. Most if not
all are having trouble bringing precip across the Delmarva and
into southern NJ. The POP and weather grids have been adjusted.
The thinking here is that precip will lose this northeast push
when the mid-level low to our west settles further south. Further
north and east, the strong onshore flow is helping to produce some
drizzle and fog.

Previous discussion...
FFA issued where this mornings unexpected heavy rain expanded an
area where it will take only 3-4 inches of rain in 6 hours to cause
flooding. PWAT up near 2 inches, significant e-se 850 mb inflow
and expected tstms was the reasoning for the FFA. Confidence on 6"
occurring between 6P today and 6P tomorrow is low but it is possible.
otherwise, bands of showers and drizzle tonight, especially late
and especially e PA and the Delmarva. nice waa pattern (aloft)
tonight.

fcst basis: 50 50 blend of the 12z/28 gfs/nam mos guidance.

&&

.SHORT TERM /6 AM THURSDAY MORNING THROUGH 6 PM THURSDAY/...
showers, drizzle. some of the rain heavy. most of the heavier rain
should be Delmarva/se PA. its possible drying from the northeast could
invade NNJ and prevent little if any rain in the afternoon. cool.
ne wind gust 20-30 mph....possibly gusty 40-45 mph along the
immediate coast of NJ and near Lewes DE.

fcst basis: a 50 50 blend of the 12z nam/gfs mos guidance.

&&

.LONG TERM /THURSDAY NIGHT THROUGH WEDNESDAY/...
Unsettled weather continues for the first portion of the extended
fcst, with some improvement by the end.

A large area of upr lvl low pres will be located to our s and w at
the start of the extendd pd. This low will spin in place then
gradually retrograde to the Grtlks and sern Canada by the weekend.

At the sfc, an area of low pres will be located over the midwest,
with high pres to the ne over New Eng and sern Canada. The sfc
features will keep a persistent moist nely flow over the area at
the sfc with swly flow aloft. As the sfc low moves by to the nw,
one pd of rain is expected and as several other s/wvs rotate thru
the upr low several other pds will occur.

As is usually the case with upr lows, it will not rain the whole
time. It will be cloudy and dreary with pds of rain. The mdls
differ on which times will be rainy and where those rainy pds will
occur. For example on Friday, the GFS is mainly dry, while the
ECMWF is fairly wet and the NAM somewhere in the middle.

Have tried to make adjustments to pops where there was a decent
signal in the mdls, but these times were limited and overall
confidence on which pds will be rainy are low.

By Sat and Sun, the upr low moves nwd into the Grtlks area and
begins to weaken and fill. Overall precip chcs shud decrease.
However, guid today is wetter than it was yda and once again it
will depend on individual w/wvs. Sat shud be wetter than Sun with
precip chcs decreasing with each passing day. Some guid now even
wants to linger precip chcs into Mon until the upr low finally
passes to our e and high pres builds in behind it.

By Wednesday, all eyes turn to the tropics and any potential
impacts from what is now Tropical Storm Matthew later in the week.
Please see NHC advisories for updates.

&&

.AVIATION /01Z THURSDAY THROUGH MONDAY/...
The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG, KILG,
KMIV, KACY and surrounding areas.

Tonight and Thursday...MVFR cigs variable down to IFR conds in areas
of showers, drizzle, stratus and fog. Some of the rain may be briefly
heavy and there may also be a tstm, (the thunder mainly PHL south)
but for now the tstm is not in the TAF. ne-e wind gusty 15-20 kt
tonight and 20 to 30 kt Thursday.

OUTLOOK...

Thu night-Fri...A prolonged period of MVFR or IFR conditions with
pds of RA expected to affect the TAF sites through the period.
E to Ne winds are expected to gust 20-25 knots for much of the
area, especially KMIV and KACY. Moderate confidence.

Fri night-Sun...Some improvement, possibly to VFR by Sun. SHRA remain
psbl. Moderate confidence.

&&

.MARINE...
Gale warning issued with at least two surges of potential 35 kt gusts
expected, one early Thursday and the more extensive probably late
Thursday afternoon into Thursday night. The Gale supersedes the
SCA and we keep the product simple by using the higher priority
warning. Seas may build higher than 11 ft at 44091 but this is a
forecast start for now.

OUTLOOK...
Thursday night...Gale warning in effect early, will likely need to
be extended.

Fri...Gale wind may remain across the northern half of the
coastal waters. SCA may be needed elsewhere.

Fri night-Sat...Wind expected to drop below SCA, however, seas
will likely remain above 5 feet thru the pd.

Sat night-Sun...Wind and seas expected to drop below SCA levels
and no marine flags anticipated.

Rip Currents...
The Surf Zone Forecast was sent a bit earlier this evening and
included a high risk of rip currents through tomorrow. A Coastal
Hazard Message (CFW) was also sent.

&&

.HYDROLOGY...
No change in headlines at this time. Delaware is seeing some
moderate rainfall at this time, but the thinking here is the flow
will turn more northerly and eventually more northwesterly with
time and decrease rainfall across the state...focusing more on the
Eastern Shore westward.

Previous discussion...
Showers will become more widespread this evening and persist
through the overnight and into tomorrow. Isolated thunder is
possible as well. In general, 1 to 3 inches of rainfall is
expected across the watch area, but locations that see the
isolated thunderstorms or heavier showers could see 5 or 6 inches.
These very high amounts will be isolated, not the norm.

FFG is lowest across Kent, Queen Annes, and Caroline counties due
to this monring's rainfall. Some areas here received up to 2
inches.

The FFA was issued through tomorrow with the additional threat
of convection, but come Saturday a widespread 3 to 5 inch rainfall
may occur. Currently, the Eastern Shore is on the periphery of the
heaviest rain. If this surge tracks east, flood potential will
further increase for the Eastern Shore.

&&

.TIDES/COASTAL FLOODING...
Departures at the NOS coastal gauges are higher this evening than
guidance had forecast. From Sandy Hook to Lewes, departures are
running about 1.25 to 1.50 above normal. This created and is still
creating some nuisance flooding in the most prone areas. The next
high tide, right around or shortly after sunrise along the coast,
is the lower of the two. Even if departures increase during the
overnight, we will have a little more room to play with come
morning. We will not issue an advisory at this time, but a repeat
of this evening, where the most vulnerable spots flood, can
definitely be expected.

Previous discussion...
A persistent onshore flow is expected for the rest of the week
into the weekend. The strongest winds are expected Thursday
through Friday. Tides levels are forecast to increase through this
period, and we should reach minor coastal flood levels Thursday
evening/night high tide cycle for many of the coastal locations.
This per ETSS, SIT modeled guidance and local in house program.

For Lewes and Reedy point we ran a 1 ft departure this eve, 1.4
tomorrow morning with ene wind gusts around 30 kt and pres at
44009 of 1022MB (a bit high for a coastal flood event where the
astro tide is not extreme). The result is marginal exceedance of
the threshold for the Thursday evening high tide cycle of roughly
.1 to .8 feet.

All of this will be reevaluated by the subsequent shifts to determine
confidence for a cf advisory issuance. we just are not sure yet
what our storm tide will be the next two high tide cycles and we
still have opportunity to adjust the max wind gusts at high tide
and in the preceding hours. Usually, lower pressure than 1022mb is
more favorable for boosting the surge. However, a notable easterly
gradient could be enough to force the minor coastal flood event.

&&

.CLIMATE...
September will be/is a top 10 warmest month through most of our
forecast area, for the 3rd consecutive month!

Also September will be/is enjoying a second consecutive top 5
warmest month in the period of record for PHL and ABE.

We've run the actual numbers through the 28th, then added the
forecast high/low for 29th and 30th.

Philadelphia: Expect a 73.8 degree average or about 5 degrees above
the monthly normal of 69.1. This will be a #4 or #5 warmest
September on record for Philadelphia.

Philadelphia September average temperature rankings

75.4 -1881
74.5 -2015
74.1 -1931 74.1 -1930
73.8 -2005 and 2016 #4

(small chance PHL avg will be 73.7 or #5 ranking)
72.9 -2010 72.9 - 1921

Philly ranked #7 warmest July followed by a warmest ever August in
the POR dating back to 1874.

Atlantic City: Expect a 71.2 degree monthly average temperature, or
4 degrees above the monthly normal of 67.2. This would equate to
an 8th warmest September in the period of record dating back to 1874.
Atlantic City recorded a #7 warmest July and then a warmest ever
August.

73.3 - 1961
72.8 - 1881
72.3 - 1931 and 1930
71.7 - 1921
71.6 - 2015
71.5 - 1933
71.3 - 2005

71.2 - 2016 #8
71.0 - 2010
70.6 - 2011 and 1906

Allentown: Expect a monthly average of 69.4 degrees, or 5.5
degrees above the monthly normal of 63.9 and a 4th warmest
September on record. Allentown ranked 8th warmest July and #2
warmest August in the period of record.

70.8 - 1961
70.3 - 1980
69.7 - 2015
69.4 - 1931 and 2016

(small chance Allentown will rank #5 at 69.3 degrees)

68.7 - 2005

Daily rainfall records for September 29 where there is maybe a small
chance of exceeding:

PHL 1.87 1963
ILG 1.97 1963
GED 1.35 2015
RDG 3.55 1934

&&

.PHI WATCHES/WARNINGS/ADVISORIES...
PA...None.
NJ...High Rip Current Risk through Thursday evening for NJZ014-
     024>026.
DE...High Rip Current Risk through Thursday evening for DEZ004.
MD...Flash Flood Watch through Thursday afternoon for MDZ008-012-
     015-019-020.
MARINE...Gale Warning from 4 AM Thursday to 2 AM EDT Friday for ANZ430-
     431-452>455.
     Gale Warning from 4 AM Thursday to 6 AM EDT Friday for ANZ450-
     451.

&&

Synopsis...Drag/Nierenberg
Near Term...Drag/Kruzdlo
Short Term...Drag
Long Term...Nierenberg
Aviation...Drag/Kruzdlo/Nierenberg
Marine...Drag/Nierenberg
Hydrology...Kruzdlo
Tides/Coastal Flooding...
Climate...Drag
Hazardous weather outlook, Sep 28, 8:32 PM EST, 4 hours 58 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
932 PM EDT WED SEP 28 2016

NJZ001-007>010-012-015-017>019-PAZ054-055-061-062-070-071-103>106-
300145-
SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-MIDDLESEX-MERCER-GLOUCESTER-
CAMDEN-NORTHWESTERN BURLINGTON-CARBON-MONROE-LEHIGH-NORTHAMPTON-
DELAWARE-PHILADELPHIA-WESTERN MONTGOMERY-EASTERN MONTGOMERY-
UPPER BUCKS-LOWER BUCKS-
932 PM EDT WED SEP 28 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL NEW JERSEY...NORTHERN
NEW JERSEY...NORTHWEST NEW JERSEY...SOUTHERN NEW JERSEY...EAST
CENTRAL PENNSYLVANIA...NORTHEAST PENNSYLVANIA AND SOUTHEAST
PENNSYLVANIA.

.DAY ONE...TONIGHT.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

PAZ060-101-102-300145-
BERKS-WESTERN CHESTER-EASTERN CHESTER-
932 PM EDT WED SEP 28 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL PENNSYLVANIA AND
SOUTHEAST PENNSYLVANIA.

.DAY ONE...TONIGHT.

PERIODS OF MODERATE TO HEAVY RAINFALL, AFTER MIDNIGHT, COULD LEAD
TO SOME LOCALIZED FLOODING, ESPECIALLY IN POOR DRAINAGE AREAS.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

MDZ008-012-015-019-020-300145-
CECIL-KENT MD-QUEEN ANNES-TALBOT-CAROLINE-
932 PM EDT WED SEP 28 2016

...FLASH FLOOD WATCH IN EFFECT THROUGH THURSDAY AFTERNOON...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST MARYLAND.

.DAY ONE...TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   FLASH FLOOD WATCH.

PERIODS OF MODERATE TO HEAVY RAINFALL, AFTER MIDNIGHT, COULD LEAD
TO SOME LOCALIZED FLOODING, ESPECIALLY IN POOR DRAINAGE AREAS.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   FLASH FLOOD WATCH.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

DEZ001>003-300145-
NEW CASTLE-KENT-INLAND SUSSEX-
932 PM EDT WED SEP 28 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL DELAWARE...NORTHERN
DELAWARE AND SOUTHERN DELAWARE.

.DAY ONE...TONIGHT.

PERIODS OF MODERATE TO HEAVY RAINFALL COULD LEAD TO SOME
LOCALIZED FLOODING TONIGHT, ESPECIALLY IN POOR DRAINAGE AREAS.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

A PERSISTENT ONSHORE FLOW COULD PRODUCE MINOR COASTAL FLOODING
THURSDAY AND FRIDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

NJZ013-016-020>023-027-300145-
WESTERN MONMOUTH-SALEM-OCEAN-CUMBERLAND-ATLANTIC-CAPE MAY-
SOUTHEASTERN BURLINGTON-
932 PM EDT WED SEP 28 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL NEW JERSEY AND
SOUTHERN NEW JERSEY.

.DAY ONE...TONIGHT.

A PERSISTENT ONSHORE FLOW COULD PRODUCE SPOTTY MINOR COASTAL
FLOODING THIS EVENING.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

A PERSISTENT ONSHORE FLOW COULD PRODUCE MINOR COASTAL FLOODING
THURSDAY AND FRIDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

DEZ004-NJZ014-024>026-300145-
DELAWARE BEACHES-EASTERN MONMOUTH-ATLANTIC COASTAL CAPE MAY-
COASTAL ATLANTIC-COASTAL OCEAN-
932 PM EDT WED SEP 28 2016

...HIGH RIP CURRENT RISK IN EFFECT THROUGH THURSDAY EVENING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHERN DELAWARE...CENTRAL
NEW JERSEY AND SOUTHERN NEW JERSEY.

.DAY ONE...TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   HIGH RIP CURRENT RISK.

THERE IS A HIGH RISK FOR THE FORMATION OF DANGEROUS RIP CURRENTS,
DUE TO THE COMBINATION OF A STRENGTHENING ONSHORE FLOW AND
BUILDING WAVES.

A PERSISTENT ONSHORE FLOW COULD PRODUCE SPOTTY MINOR COASTAL
FLOODING THIS EVENING.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   HIGH RIP CURRENT RISK.

A MODERATE TO HIGH RIP CURRENT RISK WILL LIKELY EXTEND THROUGH
THE END OF THE WEEK.

A PERSISTENT ONSHORE FLOW COULD PRODUCE MINOR COASTAL FLOODING
THURSDAY AND FRIDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

ANZ450-451-300145-
COASTAL WATERS FROM SANDY HOOK TO MANASQUAN INLET NJ OUT 20 NM-
COASTAL WATERS FROM MANASQUAN INLET TO LITTLE EGG INLET NJ OUT 20 NM-
932 PM EDT WED SEP 28 2016

...GALE WARNING IN EFFECT FROM 4 AM THURSDAY TO 6 AM EDT FRIDAY...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR ATLANTIC COASTAL WATERS.

.DAY ONE...TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   GALE WARNING.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   GALE WARNING.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

ANZ430-431-452>455-300145-
DELAWARE BAY WATERS NORTH OF EAST POINT NJ TO SLAUGHTER BEACH DE-
DELAWARE BAY WATERS SOUTH OF EAST POINT NJ TO SLAUGHTER BEACH DE-
COASTAL WATERS FROM LITTLE EGG INLET TO GREAT EGG INLET NJ OUT 20 NM-
COASTAL WATERS FROM GREAT EGG INLET TO CAPE MAY NJ OUT 20 NM-
COASTAL WATERS FROM CAPE MAY NJ TO CAPE HENLOPEN DE OUT 20 NM-
COASTAL WATERS FROM CAPE HENLOPEN TO FENWICK ISLAND DE OUT 20 NM-
932 PM EDT WED SEP 28 2016

...GALE WARNING IN EFFECT FROM 4 AM THURSDAY TO 2 AM EDT FRIDAY...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR ATLANTIC COASTAL WATERS AND
DELAWARE BAY WATERS.

.DAY ONE...TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   GALE WARNING.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   GALE WARNING.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

The radar

The Dover AFB radar (KDOX), 34 km away, was scanning. The volume nearest the first event began at 06:30 UTC.

Open the radar archive at this moment

Event by event

110 heavy rain, 13 flood, 1 flash flood. Local standard time, as filed.

Flood, Sussex

When
September 29, 1:30 AM EST to 4:30 AM EST
Where
Sussex County, 0.61 mi E of Oak Orchard to 0.54 mi SE of Oak Orchard
Cause
Heavy Rain
Reported by
State Official
Coordinates
38.599, -75.169

Water was several inches deep on the road and one car was stuck for several days due to the water on Mercer avenue.

Flood, Sussex

When
September 29, 2:00 AM EST to 5:00 AM EST
Where
Sussex County, 0.88 mi NE of Milton to 0.8 mi E of Milton
Cause
Heavy Rain
Reported by
State Official
Coordinates
38.780, -75.310

Minor Street flooding was reported.

Flash Flood, Sussex

When
September 29, 3:00 AM EST to 7:00 AM EST
Where
Sussex County, 1.15 mi ENE of Shortly to 1.28 mi SSW of Stockley
Cause
Heavy Rain
Reported by
Department of Highways
Coordinates
38.606, -75.380

Over five inches of rain fell most in short duration. Long drain road was flooded as a result near cross keys road.

Heavy Rain, Sussex

When
September 29, 5:00 AM EST to 8:00 AM EST
Where
Sussex County, 0.69 mi N of Harbeson
Reported by
Trained Spotter
Coordinates
38.730, -75.280

Over six inches of rain fell in less than a day.

Flood, Sussex

When
September 29, 5:00 AM EST to 9:00 AM EST
Where
Sussex County, 1.62 mi NNW of Cool Spg to 2.53 mi NNW of Cool Spg
Cause
Heavy Rain
Reported by
Newspaper
Coordinates
38.751, -75.264

Water on roadway at intersection of Cave Neck and Hudson roads.

Flood, Sussex

When
September 29, 6:00 AM EST to 10:00 PM EST
Where
Sussex County, 2.21 mi NW of Georgetown to 2.03 mi NW of Georgetown
Cause
Heavy Rain
Reported by
Newspaper
Coordinates
38.699, -75.413

Delaware Technical Community College had many roads that were impassable and closed the campus early in the afternoon on the 29th due to flooding.

Heavy Rain, Kent

When
September 29, 6:19 AM EST
Where
Kent County, 1.75 mi WNW of Houston
Reported by
CoCoRaHS
Coordinates
38.930, -75.530

Four and a half inches of rain fell in 24 hours.

Heavy Rain, Sussex

When
September 29, 6:24 AM EST
Where
Sussex County, Harbeson
Reported by
Unknown
Coordinates
38.720, -75.280

Eight and a half inches of rain fell.

Heavy Rain, Sussex

When
September 29, 6:24 AM EST
Where
Sussex County, Laurel
Reported by
Social Media
Coordinates
38.550, -75.570

Just over 4 inches of rain fell.

Heavy Rain, Sussex

When
September 29, 6:24 AM EST
Where
Sussex County, 0.88 mi NE of Stockley
Reported by
Social Media
Coordinates
38.640, -75.340

Five and three quarters inches of rain fell.

Heavy Rain, Kent

When
September 29, 6:24 AM EST
Where
Kent County, 0.54 mi E of Harrington
Reported by
Social Media
Coordinates
38.920, -75.570

Four and two thirds inches of rain fell.

Heavy Rain, Kent

When
September 29, 6:24 AM EST
Where
Kent County, 1.61 mi E of Hickman
Reported by
Social Media
Coordinates
38.830, -75.690

Four and a half inches of rain fell.

Heavy Rain, Sussex

When
September 29, 6:24 AM EST
Where
Sussex County, 0.69 mi N of Bridgeville
Reported by
Social Media
Coordinates
38.740, -75.600

Just under four and a half inches of rain fell.

Heavy Rain, Sussex

When
September 29, 6:24 AM EST
Where
Sussex County, 0.88 mi NW of Georgetown
Reported by
Social Media
Coordinates
38.690, -75.390

Just under four and a half inches rain fell.

Heavy Rain, Sussex

When
September 29, 6:24 AM EST
Where
Sussex County, 0.69 mi N of Ellendale
Reported by
Social Media
Coordinates
38.810, -75.420

Just under four and a half inches of rain fell.

Heavy Rain, Sussex

When
September 29, 6:24 AM EST
Where
Sussex County, Gumboro
Reported by
Social Media
Coordinates
38.480, -75.370

Four and a quarter inches of rain fell.

Heavy Rain, Kent

When
September 29, 6:24 AM EST
Where
Kent County, 0.87 mi SE of Frederica
Reported by
Social Media
Coordinates
39.010, -75.460

Four and a quarter inches of rain fell.

Heavy Rain, Sussex

When
September 29, 6:24 AM EST
Where
Sussex County, 1.38 mi N of Blades
Reported by
Social Media
Coordinates
38.650, -75.620

Just over 4 inches of rain fell.

Heavy Rain, Sussex

When
September 29, 6:24 AM EST
Where
Sussex County, 1.62 mi E of Sycamore
Reported by
Social Media
Coordinates
38.600, -75.450

Just over 4 inches of rain fell.

Heavy Rain, Sussex

When
September 29, 6:58 AM EST
Where
Sussex County, Harbeson
Reported by
Social Media
Coordinates
38.720, -75.280

Eight and a half inches of rain fell.

Flood, Sussex

When
September 29, 7:00 AM EST to 1:00 PM EST
Where
Sussex County, 1.47 mi SW of Rehoboth Beach to 3.94 mi NNE of Dewey Beach
Cause
Heavy Rain
Reported by
Newspaper
Coordinates
38.705, -75.100

Route 1 was closed due to flooding, rainfall and high tide both contributed.

Heavy Rain, Kent

When
September 29, 7:01 AM EST
Where
Kent County, 0.54 mi E of Harrington
Reported by
Social Media
Coordinates
38.920, -75.570

Four and two thirds inches of rain fell.

Heavy Rain, Kent

When
September 29, 7:01 AM EST
Where
Kent County, 1.61 mi E of Hickman
Reported by
Social Media
Coordinates
38.830, -75.690

Four and a half inches of rain fell.

Heavy Rain, Sussex

When
September 29, 7:01 AM EST
Where
Sussex County, 0.69 mi N of Bridgeville
Reported by
Social Media
Coordinates
38.740, -75.600

Four and a half inches of rain fell.

Heavy Rain, Sussex

When
September 29, 9:00 AM EST
Where
Sussex County, 0.69 mi N of Harbeson
Reported by
Trained Spotter
Coordinates
38.730, -75.280

Seven and a half inches of rain fell.

Heavy Rain, Sussex

When
September 29, 9:20 AM EST
Where
Sussex County, Harbeson
Reported by
Social Media
Coordinates
38.720, -75.280

Just over eight and a half inches fell.

Heavy Rain, Sussex

When
September 29, 9:20 AM EST
Where
Sussex County, 0.88 mi NE of Stockley
Reported by
Social Media
Coordinates
38.640, -75.340

Five and three quarters of an inch of rain fell.

Heavy Rain, Kent

When
September 29, 9:20 AM EST
Where
Kent County, 0.54 mi E of Harrington
Reported by
Social Media
Coordinates
38.920, -75.570

Just over four and a half inches of rain fell.

Heavy Rain, Kent

When
September 29, 9:25 AM EST
Where
Kent County, 1.61 mi E of Hickman
Reported by
Social Media
Coordinates
38.830, -75.690

Four and a half inches of rain fell.

Heavy Rain, Sussex

When
September 29, 9:25 AM EST
Where
Sussex County, 0.69 mi N of Bridgeville
Reported by
Social Media
Coordinates
38.740, -75.600

Four and a half inches of rain fell.

Heavy Rain, Sussex

When
September 29, 9:25 AM EST
Where
Sussex County, 0.88 mi NW of Georgetown
Reported by
Social Media
Coordinates
38.690, -75.390

Just under four and a half inches of rain fell.

Heavy Rain, Sussex

When
September 29, 9:25 AM EST
Where
Sussex County, 0.69 mi N of Ellendale
Reported by
Social Media
Coordinates
38.810, -75.420

Four and just under a third of an inch of rain fell.

Heavy Rain, Sussex

When
September 29, 9:25 AM EST
Where
Sussex County, Laurel
Reported by
Social Media
Coordinates
38.550, -75.570

Four and a quarter inches of rain fell.

Heavy Rain, Sussex

When
September 29, 9:25 AM EST
Where
Sussex County, Gumboro
Reported by
Social Media
Coordinates
38.480, -75.370

Four and a quarter inches of rain fell.

Heavy Rain, Sussex

When
September 29, 10:43 AM EST
Where
Sussex County, Harbeson
Reported by
Social Media
Coordinates
38.720, -75.280

Almost 9 inches of rain fell.

Heavy Rain, Sussex

When
September 29, 10:44 AM EST
Where
Sussex County, 0.88 mi NE of Stockley
Reported by
Social Media
Coordinates
38.640, -75.340

Six inches of rain fell.

Heavy Rain, Kent

When
September 29, 10:44 AM EST
Where
Kent County, 0.54 mi E of Harrington
Reported by
Social Media
Coordinates
38.920, -75.570

Four and a half inches of rain fell.

Heavy Rain, Sussex

When
September 29, 10:45 AM EST
Where
Sussex County, 1.48 mi NNW of Harbeson
Reported by
CoCoRaHS
Coordinates
38.740, -75.290

Six and three quarters inches of rain fell.

Heavy Rain, Sussex

When
September 29, 10:50 AM EST
Where
Sussex County, Harbeson
Reported by
Social Media
Coordinates
38.720, -75.280

Almost nine inches of rain fell.

Heavy Rain, Sussex

When
September 29, 10:50 AM EST
Where
Sussex County, 0.88 mi NE of Stockley
Reported by
Social Media
Coordinates
38.640, -75.340

Six inches of rain fell.

Heavy Rain, Kent

When
September 29, 10:50 AM EST
Where
Kent County, 0.54 mi E of Harrington
Reported by
Social Media
Coordinates
38.920, -75.570

Four and a half inches of rain fell.

Heavy Rain, Sussex

When
September 29, 10:50 AM EST
Where
Sussex County, 0.88 mi NW of Georgetown
Reported by
Social Media
Coordinates
38.690, -75.390

Four and a half inches of rain fell.

Heavy Rain, Sussex

When
September 29, 10:50 AM EST
Where
Sussex County, 0.69 mi N of Bridgeville
Reported by
Social Media
Coordinates
38.740, -75.600

Just under four and a half inches of rain fell.

Heavy Rain, Sussex

When
September 29, 10:50 AM EST
Where
Sussex County, Gumboro
Reported by
Social Media
Coordinates
38.480, -75.370

Just under four and a half inches of rain fell.

Heavy Rain, Sussex

When
September 29, 10:50 AM EST
Where
Sussex County, 0.69 mi N of Ellendale
Reported by
Social Media
Coordinates
38.810, -75.420

Four and a third inches of rain fell.

Heavy Rain, Kent

When
September 29, 10:50 AM EST
Where
Kent County, 1.61 mi E of Hickman
Reported by
Social Media
Coordinates
38.830, -75.690

Just over four inches of rain fell.

Heavy Rain, Sussex

When
September 29, 10:50 AM EST
Where
Sussex County, Laurel
Reported by
Social Media
Coordinates
38.550, -75.570

Just over four inches of rain fell.

Heavy Rain, Kent

When
September 29, 10:50 AM EST
Where
Kent County, 0.87 mi SE of Frederica
Reported by
Social Media
Coordinates
39.010, -75.460

Just over four inches of rain fell.

Heavy Rain, Sussex

When
September 29, 10:50 AM EST
Where
Sussex County, 1.38 mi N of Blades
Reported by
Social Media
Coordinates
38.650, -75.620

Just under four inches of rain fell.

Heavy Rain, Kent

When
September 29, 10:50 AM EST
Where
Kent County, 0.87 mi SE of Dover
Reported by
Social Media
Coordinates
39.160, -75.520

Just under four inches of rain fell.

Heavy Rain, Sussex

When
September 29, 10:50 AM EST
Where
Sussex County, Pilottown
Reported by
Social Media
Coordinates
38.780, -75.150

Three and a half inches of rain fell.

Heavy Rain, Kent

When
September 29, 10:50 AM EST
Where
Kent County, 0.54 mi E of Woodside
Reported by
Social Media
Coordinates
39.070, -75.570

Two and a half inches of rain fell.

Heavy Rain, Sussex

When
September 29, 10:57 AM EST
Where
Sussex County, 1.62 mi E of Sycamore
Reported by
Social Media
Coordinates
38.600, -75.450

Just over four inches of rain fell.

Flood, Sussex

When
September 29, 11:46 AM EST to 2:46 PM EST
Where
Sussex County, 3.5 mi NW of Slaughter Beach to 3.2 mi NW of Slaughter Beach
Cause
Heavy Rain
Reported by
Department of Highways
Coordinates
38.940, -75.320

Cedar Beach Road was closed at Lighthouse Road due to flooding.

Heavy Rain, Sussex

When
September 29, 12:20 PM EST
Where
Sussex County, Harbeson
Reported by
Social Media
Coordinates
38.720, -75.280

Just over nine inches of rain fell.

Heavy Rain, Sussex

When
September 29, 12:20 PM EST
Where
Sussex County, 0.88 mi NE of Stockley
Reported by
Social Media
Coordinates
38.640, -75.340

Just over six inches of rain fell.

Heavy Rain, Kent

When
September 29, 12:20 PM EST
Where
Kent County, 0.54 mi E of Harrington
Reported by
Trained Spotter
Coordinates
38.920, -75.570

Four and a half inches of rain fell.

Heavy Rain, Sussex

When
September 29, 12:20 PM EST
Where
Sussex County, 0.69 mi N of Ellendale
Reported by
Social Media
Coordinates
38.810, -75.420

Just under four and a half inches of rain fell.

Heavy Rain, Sussex

When
September 29, 12:22 PM EST
Where
Sussex County, 0.88 mi NW of Georgetown
Reported by
Social Media
Coordinates
38.690, -75.390

Four and two thirds inches of rain fell.

Heavy Rain, Sussex

When
September 29, 12:22 PM EST
Where
Sussex County, Gumboro
Reported by
Social Media
Coordinates
38.480, -75.370

Four and a half inches of rain fell.

Heavy Rain, Sussex

When
September 29, 12:22 PM EST
Where
Sussex County, 0.69 mi N of Bridgeville
Reported by
Social Media
Coordinates
38.740, -75.600

Just under four a half inches of rain fell.

Heavy Rain, Kent

When
September 29, 12:22 PM EST
Where
Kent County, 1.61 mi E of Hickman
Reported by
Social Media
Coordinates
38.830, -75.690

Just over four inches of rain fell.

Heavy Rain, Sussex

When
September 29, 12:32 PM EST
Where
Sussex County, 0.88 mi NW of Greenwood
Reported by
Mesonet
Coordinates
38.810, -75.590

Just over four and a half inches of rain fell.

Heavy Rain, Sussex

When
September 29, 12:35 PM EST
Where
Sussex County, 0.88 mi NE of Georgetown Arpt
Reported by
ASOS
Coordinates
38.690, -75.360

Just under five inches of rain fell.

Heavy Rain, Kent

When
September 29, 12:38 PM EST
Where
Kent County, 0.87 mi SW of Felton
Reported by
Mesonet
Coordinates
39.010, -75.580

Just over four inches of rain fell.

Heavy Rain, Sussex

When
September 29, 12:42 PM EST
Where
Sussex County, Harbeson
Reported by
Social Media
Coordinates
38.720, -75.280

Just over nine inches of rain fell.

Heavy Rain, Sussex

When
September 29, 12:47 PM EST
Where
Sussex County, Harbeson
Reported by
Social Media
Coordinates
38.720, -75.280

Just over nine inches of rain fell.

Heavy Rain, Sussex

When
September 29, 12:47 PM EST
Where
Sussex County, 0.88 mi NE of Stockley
Reported by
Social Media
Coordinates
38.640, -75.340

Just over six inches of rain fell.

Heavy Rain, Sussex

When
September 29, 12:47 PM EST
Where
Sussex County, 0.88 mi NW of Georgetown
Reported by
Social Media
Coordinates
38.690, -75.390

Just under five inches of rain fell.

Heavy Rain, Sussex

When
September 29, 1:03 PM EST
Where
Sussex County, Harbeson
Reported by
Social Media
Coordinates
38.720, -75.280

Just over nine inches of rain fell.

Heavy Rain, Sussex

When
September 29, 1:29 PM EST
Where
Sussex County, Harbeson
Reported by
Social Media
Coordinates
38.720, -75.280

Just over nine inches of rain fell.

Heavy Rain, Sussex

When
September 29, 1:55 PM EST
Where
Sussex County, Harbeson
Reported by
Social Media
Coordinates
38.720, -75.280

Almost nine and a half inches of rain fell.

Heavy Rain, Sussex

When
September 29, 1:55 PM EST
Where
Sussex County, 0.88 mi NE of Stockley
Reported by
Social Media
Coordinates
38.640, -75.340

Six and a half inches of rain fell.

Heavy Rain, Sussex

When
September 29, 1:55 PM EST
Where
Sussex County, Gumboro
Reported by
Social Media
Coordinates
38.480, -75.370

Almost five inches of rain fell.

Heavy Rain, Sussex

When
September 29, 1:55 PM EST
Where
Sussex County, 0.88 mi NW of Georgetown
Reported by
Social Media
Coordinates
38.690, -75.390

Almost five inches of rain fell.

Heavy Rain, Kent

When
September 29, 1:55 PM EST
Where
Kent County, 0.54 mi E of Harrington
Reported by
Social Media
Coordinates
38.920, -75.570

Four and a half inches of rain fell.

Heavy Rain, Sussex

When
September 29, 1:55 PM EST
Where
Sussex County, 0.69 mi N of Ellendale
Reported by
Social Media
Coordinates
38.810, -75.420

Four and a half inches of rain fell.

Flood, Sussex

When
September 29, 2:00 PM EST to 5:00 PM EST
Where
Sussex County, Harbeson to 1.02 mi W of Harbeson
Cause
Heavy Rain
Reported by
Department of Highways
Coordinates
38.720, -75.280

Route 5 was closed in a couple of locations.

Heavy Rain, Sussex

When
September 29, 2:01 PM EST
Where
Sussex County, 0.88 mi NE of Redden
Reported by
Mesonet
Coordinates
38.740, -75.420

Just over four inches of rain fell.

Heavy Rain, Sussex

When
September 29, 2:05 PM EST
Where
Sussex County, Harbeson
Reported by
Social Media
Coordinates
38.720, -75.280

Nine and a half inches of rain fell.

Heavy Rain, Sussex

When
September 29, 2:05 PM EST
Where
Sussex County, 0.88 mi NE of Stockley
Reported by
Social Media
Coordinates
38.640, -75.340

Six and a half inches of rain fell.

Heavy Rain, Sussex

When
September 29, 2:33 PM EST
Where
Sussex County, 0.88 mi NE of Redden
Reported by
Mesonet
Coordinates
38.740, -75.420

Almost four and a half inches of rain fell.

Heavy Rain, Sussex

When
September 29, 2:36 PM EST
Where
Sussex County, Harbeson
Reported by
Social Media
Coordinates
38.720, -75.280

Almost ten inches of rain fell.

Heavy Rain, Sussex

When
September 29, 2:36 PM EST
Where
Sussex County, 0.88 mi NE of Stockley
Reported by
Social Media
Coordinates
38.640, -75.340

Just under seven inches of rain fell.

Heavy Rain, Sussex

When
September 29, 2:36 PM EST
Where
Sussex County, 0.88 mi NW of Georgetown
Reported by
Social Media
Coordinates
38.690, -75.390

Just under five inches of rain fell.

Heavy Rain, Sussex

When
September 29, 2:36 PM EST
Where
Sussex County, Gumboro
Reported by
Social Media
Coordinates
38.480, -75.370

Just under five inches of rain fell.

Heavy Rain, Sussex

When
September 29, 2:36 PM EST
Where
Sussex County, 1.62 mi E of Sycamore
Reported by
Social Media
Coordinates
38.600, -75.450

Almost five inches of rain fell.

Heavy Rain, Sussex

When
September 29, 2:36 PM EST
Where
Sussex County, Pilottown
Reported by
Social Media
Coordinates
38.780, -75.150

Four and a half inches of rain fell.

Heavy Rain, Sussex

When
September 29, 2:47 PM EST
Where
Sussex County, Harbeson
Reported by
Social Media
Coordinates
38.720, -75.280

Almost ten inches of rain fell.

Flood, Sussex

When
September 29, 4:10 PM EST to 7:10 PM EST
Where
Sussex County, 0.88 mi SE of Georgetown Arpt to 1.1 mi NNE of Georgetown Arpt
Cause
Heavy Rain
Reported by
County Official
Coordinates
38.670, -75.360

A road was reported to be flooded.

Flood, Sussex

When
September 29, 5:03 PM EST to 8:03 PM EST
Where
Sussex County, 1.85 mi N of Millsboro to 1.96 mi E of Dagsboro
Cause
Heavy Rain
Reported by
Department of Highways
Coordinates
38.607, -75.297

Roadway flooding at the intersection of routes 113 and 26. Flooding also along route 20 and other spots on 113.

Heavy Rain, Sussex

When
September 29, 5:32 PM EST
Where
Sussex County, Harbeson
Reported by
Social Media
Coordinates
38.720, -75.280

Over eleven inches of rain fell.

Heavy Rain, Sussex

When
September 29, 5:34 PM EST
Where
Sussex County, 0.88 mi NE of Stockley
Reported by
Social Media
Coordinates
38.640, -75.340

Just over eight inches of rain fell.

Heavy Rain, Sussex

When
September 29, 5:36 PM EST
Where
Sussex County, 0.88 mi NE of Georgetown Arpt
Reported by
ASOS
Coordinates
38.690, -75.360

Just over six inches of rain fell.

Heavy Rain, Sussex

When
September 29, 5:41 PM EST
Where
Sussex County, 0.88 mi NE of Selbyville
Reported by
Social Media
Coordinates
38.460, -75.220

Just over five inches of rain fell.

Heavy Rain, Sussex

When
September 29, 5:42 PM EST
Where
Sussex County, Pilottown
Reported by
Social Media
Coordinates
38.780, -75.150

Almost six inches of rain fell.

Heavy Rain, Sussex

When
September 29, 5:43 PM EST
Where
Sussex County, 0.88 mi SW of Delmar State Line Ar
Reported by
Social Media
Coordinates
38.460, -75.580

Just over five inches of rain fell.

Heavy Rain, Kent

When
September 29, 5:44 PM EST
Where
Kent County, 0.54 mi E of Harrington
Reported by
Social Media
Coordinates
38.920, -75.570

Just over five inches of rain fell.

Heavy Rain, Sussex

When
September 29, 5:45 PM EST
Where
Sussex County, 0.69 mi N of Bridgeville
Reported by
Social Media
Coordinates
38.740, -75.600

Just over five inches of rain fell.

Heavy Rain, Sussex

When
September 29, 5:45 PM EST
Where
Sussex County, 0.88 mi NW of Greenwood
Reported by
Social Media
Coordinates
38.810, -75.590

Just over five inches of rain fell.

Heavy Rain, Sussex

When
September 29, 5:45 PM EST
Where
Sussex County, 0.88 mi NW of Greenwood
Reported by
Social Media
Coordinates
38.810, -75.590

Just over five inches of rain fell.

Heavy Rain, Kent

When
September 29, 5:46 PM EST
Where
Kent County, 0.87 mi SE of Frederica
Reported by
Social Media
Coordinates
39.010, -75.460

Almost five inches of rain fell.

Heavy Rain, Sussex

When
September 29, 5:47 PM EST
Where
Sussex County, 0.69 mi N of Bethany Beach
Reported by
Social Media
Coordinates
38.540, -75.070

Four and a half inches of rain fell.

Heavy Rain, Sussex

When
September 29, 5:49 PM EST
Where
Sussex County, 0.69 mi N of Ellendale
Reported by
Social Media
Coordinates
38.810, -75.420

Over five and a half inches of rain fell.

Flood, Sussex

When
September 29, 9:00 PM EST to September 30, 12:00 AM EST
Where
Sussex County, 0.69 mi N of Bethany Beach to 0.81 mi WSW of Dewey Beach
Cause
Heavy Rain
Reported by
Department of Highways
Coordinates
38.540, -75.070

Route 1 closed between Bethany Beach and Dewey beach due to water on the road.

Heavy Rain, Kent

When
September 29, 9:47 PM EST
Where
Kent County, 0.53 mi W of Smyrna
Reported by
Social Media
Coordinates
39.300, -75.610

Around three inches of rain fell.

Heavy Rain, Kent

When
September 29, 9:47 PM EST
Where
Kent County, 0.54 mi E of Woodside
Reported by
Social Media
Coordinates
39.070, -75.570

Around three inches of rain fell.

Heavy Rain, Kent

When
September 29, 9:48 PM EST
Where
Kent County, 0.87 mi SE of Dover
Reported by
Social Media
Coordinates
39.160, -75.520

Just over four inches of rain was measured.

Heavy Rain, Kent

When
September 29, 9:48 PM EST
Where
Kent County, 0.54 mi E of Harrington
Reported by
Social Media
Coordinates
38.920, -75.570

Almost six inches of rain fell.

Heavy Rain, Sussex

When
September 29, 9:48 PM EST
Where
Sussex County, 0.88 mi NW of Greenwood
Reported by
Social Media
Coordinates
38.810, -75.590

Five inches of rain fell.

Heavy Rain, Sussex

When
September 29, 9:50 PM EST
Where
Sussex County, Harbeson
Reported by
Social Media
Coordinates
38.720, -75.280

Over twelve inches of rain fell.

Heavy Rain, Sussex

When
September 29, 9:51 PM EST
Where
Sussex County, Rehoboth Beach
Reported by
Social Media
Coordinates
38.720, -75.080

Just over three inches of rain fell.

Heavy Rain, Sussex

When
September 29, 9:51 PM EST
Where
Sussex County, 1.38 mi N of Blades
Reported by
Social Media
Coordinates
38.650, -75.620

Just over three inches of rain fell.

Heavy Rain, Sussex

When
September 29, 9:51 PM EST
Where
Sussex County, 0.69 mi N of Ellendale
Reported by
Social Media
Coordinates
38.810, -75.420

Just over six inches of rain fell.

Heavy Rain, Sussex

When
September 29, 9:52 PM EST
Where
Sussex County, Pilottown
Reported by
Social Media
Coordinates
38.780, -75.150

Just over six inches of rain fell.

Heavy Rain, Sussex

When
September 29, 9:52 PM EST
Where
Sussex County, 0.69 mi N of Bethany Beach
Reported by
Social Media
Coordinates
38.540, -75.070

Five inches of rain fell.

Heavy Rain, Sussex

When
September 29, 9:52 PM EST
Where
Sussex County, 0.88 mi NE of Stockley
Reported by
Social Media
Coordinates
38.640, -75.340

Just over nine inches of rain fell.

Heavy Rain, Sussex

When
September 29, 9:53 PM EST
Where
Sussex County, 0.88 mi SW of Delmar State Line Ar
Reported by
Social Media
Coordinates
38.460, -75.580

Almost six inches of rain fell.

Heavy Rain, Sussex

When
September 29, 9:53 PM EST
Where
Sussex County, Laurel
Reported by
Social Media
Coordinates
38.550, -75.570

Almost five inches of rain fell.

Flood, Kent

When
September 29, 10:30 PM EST to September 30, 1:30 AM EST
Where
Kent County, 1.28 mi WNW of Milford to 1.5 mi SW of Milford
Cause
Heavy Rain
Reported by
State Official
Coordinates
38.930, -75.440

Minor flooding was reported.

Flood, New Castle

When
September 30, 3:00 AM EST to 6:00 AM EST
Where
New Castle County, 0.87 mi NE of Odessa to 1.77 mi E of Odessa
Cause
Heavy Rain
Reported by
Department of Highways
Coordinates
39.460, -75.660

Marl Pit road closed between US 13 and Brick Mill Road due to water on road.

Heavy Rain, Sussex

When
September 30, 3:48 AM EST
Where
Sussex County, 0.88 mi NE of Georgetown Arpt
Reported by
ASOS
Coordinates
38.690, -75.360

Almost nine inches of rain fell from the 27th through the 30th.

Flood, New Castle

When
September 30, 4:00 AM EST to 11:00 AM EST
Where
New Castle County, 1.32 mi S of Stanton to 0.97 mi SSE of Bellemoor
Cause
Heavy Rain
Reported by
Newspaper
Coordinates
39.701, -75.633

The Christina River rose Friday morning to 10.6 feet, .1 feet above flood stage. Water covered a section of nearby Airport Road for a time. A car was stuck in the water while it was flooded as well.

Heavy Rain, Kent

When
September 30, 5:39 AM EST
Where
Kent County, 1.28 mi ENE of Masten
Reported by
Trained Spotter
Coordinates
38.980, -75.600

Almost six inches of rain fell.

What these are

Flood
Flooding that develops more slowly than a flash flood: rivers leaving their banks, or water standing over land for an extended time.
Flash Flood
Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.
Heavy Rain
Rainfall totals unusual for the place and season that did not produce a flood.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Delaware in 2016Every state in 2016This day in weather historyWarnings in Delaware, September 2016

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. Each event’s entry at NCEI: 654911, 654912, 655037, 654921, 655635, 655634, 654923, 654922, 654924, 654925, 654926, 654927, 654928, 654929, 654930, 654931, 654932, 654933, 654934, 654935, 655639, 654936, 654937, 654938, 654939, 654940, 654941, 654942, 654943, 654944, 654945, 654946, 654947, 654948, 654950, 654951, 654952, 654949, 654953, 654954, and more.