Alert archive / Pennsylvania / River Flood Warnings in 2026
River Flood Warning 1, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this river flood warning at Jun 15, 2026, 2:12 AM EDT for Delaware County, Pennsylvania. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 15, 2026, 2:12 AM EDT (06:12 UTC)
- Expired
- Jun 15, 2026, 4:16 AM EDT
- In force
- 2 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- Minor
County Delaware County, PA
The radar
The Philadelphia radar (KDIX), 86 km from the middle of the area, began a volume at 06:13 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The river
Written for the forecast point Chester Creek near Chester (CHSP1). The gauge peaked at 7.68 ft at Jun 15, 2026, 3:00 AM EDT.
- Action stage
- 7 ft
- Minor stage
- 8 ft
- Moderate stage
- 10 ft
- Major stage
- 14 ft
This gauge today: stage, forecast and historic crests
Stage from the USGS instantaneous record for site 01477000, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.
The text
As transmitted.
833
WGUS41 KPHI 150612
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mount Holly NJ
212 AM EDT Mon Jun 15 2026
...The National Weather Service in Mount Holly NJ has issued a Flood
Warning for the following rivers in Pennsylvania...
Chester Creek Near Chester affecting Delaware County.
For the Chester Creek...including Chester...Minor flooding is
forecast.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
Additional information is available at www.weather.gov/phi.
The next statement will be issued early this morning at 430 AM EDT.
&&
PAC045-150830-
/O.NEW.KPHI.FL.W.0001.260615T0612Z-260615T0816Z/
/CHSP1.1.ER.260615T0642Z.260615T0700Z.260615T0715Z.NO/
212 AM EDT Mon Jun 15 2026
...FLOOD WARNING IN EFFECT FOR EARLY THIS MORNING...
* WHAT...Minor flooding is forecast.
* WHERE...Chester Creek near Chester.
* WHEN...For early this morning.
* IMPACTS...At 7.0 feet, The creek floods adjacent open land.
* ADDITIONAL DETAILS...
- At 2:01 AM EDT Monday the stage was 7.3 feet.
- Forecast...The river will fall to 2.7 feet and then begin
rising this afternoon. It will then rise again to 2.8 feet
this afternoon. It will fall to 2.3 feet and then begin
rising just after midnight tonight. It will then rise again
to 2.5 feet late tonight. It will fall again and remain below
flood stage.
- Flood stage is 8.0 feet.
- Flood History...This crest compares to a previous crest of
8.2 feet on 03/29/2010.
- http://www.weather.gov/safety/flood
&&
Fld Observed Forecasts (2 am EDT)
Location Stg Stg Day/Time Tue Wed Thu
Chester Creek
Chester 8.0 7.3 Mon 2 am EDT 2.3 MSG MSG
&&
LAT...LON 3991 7542 3985 7534 3981 7540 3987 7547
$$
HoeflichWhat forecasters said that day
The local office's own words before this river flood warning went out, 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 this river flood warning went out at Jun 15, 1:49 AM EDT, 23 minutes earlier. Its key messages:
- 1. The severe weather threat has ended but there are still lingering showers. Showers should be largely out of the area by 3 AM however there may continue to be some lingering areas of flooding through the overnight as water levels on creeks and streams near the I-95 corridor are elevated. 2. The Coastal Flood Advisory has been allowed to expire however another round of minor coastal flooding will be possible with the Monday evening high tide cycle. 3. Some severe thunderstorms possible Thursday afternoon and evening.
Area forecast discussion, Jun 15, 1:49 AM EDT, 23 minutes before
Area Forecast Discussion
National Weather Service Mount Holly NJ
149 AM EDT Mon Jun 15 2026
.WHAT HAS CHANGED...
Severe Thunderstorm Watch and the Coastal Flood Advisory have
been allowed to expire. Updated these key messages and also
updated aviation section for 06z TAFs.
&&
.KEY MESSAGES...
1. The severe weather threat has ended but there are still
lingering showers. Showers should be largely out of the area by
3 AM however there may continue to be some lingering areas of
flooding through the overnight as water levels on creeks and
streams near the I-95 corridor are elevated.
2. The Coastal Flood Advisory has been allowed to expire however
another round of minor coastal flooding will be possible with
the Monday evening high tide cycle.
3. Some severe thunderstorms possible Thursday afternoon and evening.
&&
.DISCUSSION...
KEY MESSAGE 1..The severe weather threat has ended but there
are still lingering showers. Showers should be largely out of
the area by 3 AM however there may continue to be some lingering
areas of flooding through the overnight as water levels on
creeks and streams near the I-95 corridor are elevated.
As of 1 AM, the cold front is moving through our eastern PA
zones. The front will continue moving eastward and will clear
the coast by around 5 AM. As this occurs lingering showers will
exit the region. However water levels on creeks and streams near
the I-95 corridor are elevated so localized flooding will
remain a concern through most of the night. No additional severe
weather is expected though.
KEY MESSAGE 2...The Coastal Flood Advisory has been allowed to expire however
another round of minor coastal flooding will be possible with
the Monday evening high tide cycle.
A New Moon is occurring this weekend and resulting in higher
than normal astronomical tides. The tidal flooding threat with
this past evening's high tide cycle has come to an end but at
least one more round of some minor coastal flooding appears
likely with the Monday evening high tide cycle for the Atlantic
Coast and Delaware Bay.
Tidal flooding is not currently expected along the eastern
shore of Chesapeake Bay.
KEY MESSAGE 3...Some severe thunderstorms possible Thursday afternoon
and evening.
An upper-level trough centered over south-central Canada is forecast
to strengthen eastward and also southward across the Great Lakes to
end the week. A strong shortwave rounding the base of this trough
may result in a portion of it taking on a negative tilt across the
eastern Great Lakes and toward New England late Wednesday and Thursday.
This feature is a bit stronger in the ECMWF solution, while the
GFS ensembles are mostly a little weaker. A deepening surface low
will accompany it and track across the eastern Great Lakes and into
adjacent Canada during Thursday. A strong cold front will then arrive
into our area Thursday afternoon or Thursday evening.
As the synoptic pattern evolves, the flow will increase out of the
south and southwest. This will advect deeper moisture northward, and
in tandem with strengthening warm air advection will lead to
increased instability during the day Thursday. In addition, a strong
mid to upper level jet is forecast to extend eastward from the
eastern Great Lakes. While the core of the 500 mb jet (80-100 knots)
is forecast to remain mainly northwest of our area, 40-70 knots of
flow at 500 mb is still forecast across our area Thursday afternoon
into the evening. This increased flow will result in greater shear
magnitudes. While there remains some timing differences among the
guidance regarding the main features, the consensus is that enough
instability should overlap with the stronger shear along with
incoming stronger forcing. As a result, there continues to be some
severe thunderstorm potential Thursday afternoon and evening. As of
now, locally damaging winds are the primary threat especially if
convection develops into a squall line. However if shear and
instability ends up being even greater, than all severe thunderstorm
hazards may come into play especially if the mode is discrete for a
time. The details remain much less certain at this time range given
the typical uncertainty with instability and the thermodynamic
profiles. The forecast synoptic setup however with a deepening
surface low tracking to our northwest with strong flow within a
warmer and more moist environment suggests some risk for severe
thunderstorms. In addition, the main trough may end up arriving on
Friday with some additional chances for showers and some
thunderstorms.
The I-95 corridor and the coastal plain (away from the immediate
coast) looks to be the hottest during Thursday ahead of the
convection, with the heat indices potentially getting very close to
100 degrees.
&&
.AVIATION /06Z MONDAY THROUGH FRIDAY/...
The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG,
KILG, KMIV, KACY and surrounding areas.
Rest of Overnight...Lingering MVFR conditions will improve to
VFR between 6 and 9z as a cold front sweeps through the area. As
this occurs WSW winds will shift to NW around 10 knots. High
confidence.
Monday...VFR with a few/scattered clouds in the
afternoon. Northwest winds around 10-15 kt, occasionally gusting
up to 20 kt. High confidence.
Outlook...
Monday night...VFR. Northwest winds quickly diminish and becoming
light and variable.
Tuesday...Mainly VFR.
Wednesday...Some sub-VFR conditions with a few showers or a
thunderstorm possible.
Thursday...A period of sub-VFR conditions probable in the afternoon
and evening as showers and some thunderstorms increase.
Friday...Some showers and thunderstorms may linger with areas of sub-
VFR conditions possible at times.
&&
.MARINE...
The Small Craft Advisory for portion of our Atlantic coastal
waters and the Delaware Bay has been extended until 3 AM.
Winds will diminish overnight as winds turn northwesterly
behind a cold front. Northwest winds will generally remain
around 15-20 kt through Monday morning, however a few rogue
gusts up to 22-23 kt are possible before further diminishing
throughout the day. Seas generally around 2-4 feet, locally 5
feet tonight, and around 2-3 feet on Monday.
Showers and thunderstorms are likely through tonight, which may
cause localized higher winds/seas. Some marine fog possible tonight
as well. On Monday, fair weather expected.
Outlook...
Monday night through Wednesday...The conditions are anticipated to
be below Small Craft Advisory criteria.
Thursday...A period of Small Craft Advisory conditions probable.
Southerly wind gusts could near gale force for a time later Thursday.
Some gusty thunderstorms late in the afternoon and evening possible.
Friday...The conditions are anticipated to be below Small Craft
Advisory criteria.
Rip Currents...
For Monday, winds become northwest 10-20 mph with a continued
medium southerly swell of 6-7 seconds. With breaking waves 2
feet or less, have gone with a LOW risk for the development of
dangerous rip currents at all beaches.
For Tuesday, winds start northerly before shifting southeasterly,
but only at around 5 mph with a continued medium southerly
swell of 6-7 seconds. With breaking waves 2 feet or less, have
gone with a LOW risk for the development of dangerous rip
currents at all beaches.
For specific beach forecasts, visit weather.gov/beach/phi
&&
.PHI WATCHES/WARNINGS/ADVISORIES...
PA...None.
NJ...None.
DE...None.
MD...None.
MARINE...Small Craft Advisory until 3 AM EDT early this morning for
ANZ430-431-450>454.
&&
DISCUSSION...DeSilva/Fitzsimmons/Gorse/Hoeflich
AVIATION...DeSilva/Fitzsimmons/Gorse
MARINE...Fitzsimmons/GorseHazardous weather outlook, Jun 14, 3:47 AM EDT, 22 hours 25 minutes before
Hazardous Weather Outlook National Weather Service Mount Holly NJ 347 AM EDT Sun Jun 14 2026 MDZ012-015-019-020-150915- Kent MD-Queen Annes-Talbot-Caroline- 347 AM EDT Sun Jun 14 2026 This Hazardous Weather Outlook is for northeast Maryland. .DAY ONE...Today and tonight. There is a SLIGHT Risk (level 2 out of 5) of severe thunderstorms late this afternoon into this evening. .DAYS TWO THROUGH SEVEN...Monday through Saturday. There is a low probability for widespread hazardous weather. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures.
In the hours before
Local storm report, Jun 15, 12:50 AM EDT, 1 hour 22 minutes before
Preliminary Local Storm Report
National Weather Service Mount Holly NJ
1250 AM EDT Mon Jun 15 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1117 PM Tstm Wnd Dmg 2 S Mercerville 40.21N 74.68W
06/14/2026 Mercer NJ Public
Trees and wires down around Hamilton
Township. Time estimated from radar.
&&
HoeflichLocal storm report, Jun 15, 12:59 AM EDT, 1 hour 13 minutes before
Preliminary Local Storm Report
National Weather Service Mount Holly NJ
1259 AM EDT Mon Jun 15 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1113 PM Tstm Wnd Dmg Gloucester City 39.89N 75.12W
06/14/2026 Camden NJ 911 Call Center
Wires down in Gloucester City. Time
estimated from radar.
&&
HoeflichLocal storm report, Jun 15, 1:04 AM EDT, 1 hour 8 minutes before
Preliminary Local Storm Report
National Weather Service Mount Holly NJ
104 AM EDT Mon Jun 15 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1125 PM Tstm Wnd Dmg 1 NE Princeton 40.35N 74.65W
06/14/2026 Mercer NJ Dept of Highways
Downed Trees on NJ 27 Northbound North of US
206 (Princeton Twp), All lanes closed. Time
estimated from radar.
&&
HoeflichLocal storm report, Jun 15, 1:26 AM EDT, 46 minutes before
Preliminary Local Storm Report
National Weather Service Mount Holly NJ
126 AM EDT Mon Jun 15 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0100 AM Flash Flood 1 NNE Middletown Twp. 39.92N 75.42W
06/15/2026 Delaware PA Emergency Mngr
Spring Run has flooded near Rose Tree Road
with Ridley Creek rising. Time given in
report.
&&
HoeflichLocal storm report, Jun 15, 1:41 AM EDT, 31 minutes before
Preliminary Local Storm Report
National Weather Service Mount Holly NJ
141 AM EDT Mon Jun 15 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1245 AM Flash Flood 1 S Millbourne 39.95N 75.25W
06/15/2026 Philadelphia PA Other Federal
Cobbs Creek (COBP1) went into flood stage.
&&
HoeflichLocal storm report, Jun 15, 1:45 AM EDT, 27 minutes before
Preliminary Local Storm Report...Summary
National Weather Service Mount Holly NJ
145 AM EDT Mon Jun 15 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1036 PM Tstm Wnd Dmg 1 SSE Chestnut Hill 40.07N 75.20W
06/14/2026 Philadelphia PA Emergency Mngr
Trees down along Lincoln Drive near Gypsy Ln
with a lane restriction. Time estimated from
radar.
1236 AM Flash Flood 1 SSW Summerdale 40.02N 75.10W
06/15/2026 Philadelphia PA Other Federal
Frankford Creek went into flood stage.
1245 AM Flash Flood 1 S Millbourne 39.95N 75.25W
06/15/2026 Philadelphia PA Other Federal
Cobbs Creek (COBP1) went into flood stage.
1020 PM Tstm Wnd Dmg Media 39.92N 75.39W
06/14/2026 Delaware PA Emergency Mngr
Several reports of wires down around Media.
Time estimated from radar.
1023 PM Tstm Wnd Dmg 1 SSW Broomall 39.97N 75.37W
06/14/2026 Delaware PA 911 Call Center
Trees and wires down around Marple Township.
Time estimated from radar.
1025 PM Tstm Wnd Dmg Prospect Park 39.89N 75.31W
06/14/2026 Delaware PA Emergency Mngr
Multiple reports of wires down around Ridley
Park and Prospect Park in Delaware County.
Time estimated from radar.
1027 PM Tstm Wnd Dmg 1 ENE Wayne 40.05N 75.36W
06/14/2026 Delaware PA 911 Call Center
Trees down around Radnor Township. Time
estimated from radar.
1029 PM Tstm Wnd Dmg 1 SW Broomall 39.97N 75.36W
06/14/2026 Delaware PA Emergency Mngr
Reports of wires down around Broomall. Time
estimated from radar.
1045 PM Flash Flood Upper Chichester Twp 39.86N 75.45W
06/14/2026 Delaware PA Emergency Mngr
Water rescue on Bernard Street in West
Chester. Time estimated.
1050 PM Flash Flood Lansdowne 39.94N 75.27W
06/14/2026 Delaware PA Emergency Mngr
Water rescue on a flooded roadway in
Lansdowne. Time estimated from radar.
1100 PM Flash Flood Darby Twp 39.91N 75.30W
06/14/2026 Delaware PA 911 Call Center
Roadways flooded around Darby Township. Time
estimated.
0100 AM Flash Flood 1 NNE Middletown Twp. 39.92N 75.42W
06/15/2026 Delaware PA Emergency Mngr
Spring Run has flooded near Rose Tree Road
with Ridley Creek rising. Time given in
report.
1054 PM Tstm Wnd Dmg Doylestown 40.31N 75.13W
06/14/2026 Bucks PA 911 Call Center
Trees down around Doylestown. Time estimated
from radar.
1106 PM Tstm Wnd Dmg Washington Crossing 40.29N 74.87W
06/14/2026 Bucks PA Dept of Highways
Downed tree on General Mercer Road,
resulting in a road closure. Time estimated
from radar.
1108 PM Tstm Wnd Dmg 2 NNE Tullytown 40.17N 74.79W
06/14/2026 Bucks PA 911 Call Center
Trees down in Falls Township, PA. Time
estimated from radar.
1117 PM Tstm Wnd Dmg 2 S Mercerville 40.21N 74.68W
06/14/2026 Mercer NJ Public
Trees and wires down around Hamilton
Township. Time estimated from radar.
1125 PM Tstm Wnd Dmg 1 NE Princeton 40.35N 74.65W
06/14/2026 Mercer NJ Dept of Highways
Downed Trees on NJ 27 Northbound North of US
206 (Princeton Twp), All lanes closed. Time
estimated from radar.
1113 PM Tstm Wnd Dmg Gloucester City 39.89N 75.12W
06/14/2026 Camden NJ 911 Call Center
Wires down in Gloucester City. Time
estimated from radar.
1156 PM Flash Flood 1 W Audubon 39.89N 75.10W
06/14/2026 Camden NJ Dept of Highways
As of 11:56pm, theres Flooding on US 130 in
both directions North of I-76 in Gloucester
City. All lanes closed.
1150 PM Flash Flood 2 SW Burlington Twp 40.05N 74.85W
06/14/2026 Burlington NJ NWS Employee
Water flowing over the road on Rancocas
Road. Time estimated.
1017 PM Marine Tstm Wind 1 W Indian Beach 38.68N 75.08W
06/14/2026 M54 MPH ANZ455 DE Mesonet
Dewey Beach mesonet gusted to 47 kt.
1014 PM Marine Tstm Wind 1 WSW Cape Henlopen Bea 38.80N 75.10W
06/14/2026 M47 MPH ANZ431 DE Mesonet
Cape Henlopen mesonet gusted to 41 kt.
1115 PM Flash Flood Bear 39.62N 75.66W
06/14/2026 New Castle DE Emergency Mngr
Water rescue along Foxhunt Drive in Bear,
DE.
&&The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 14, 8:16 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe | 44 min |
| Jun 14, 9:06 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 54 min |
| Jun 14, 9:50 PM EDT | Flash Flood Warning | PHI | Chester | 3 hr |
| Jun 14, 9:54 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 51 min |
| Jun 14, 10:15 PM EDT | Flash Flood Warning | PHI | Chester, Delaware | 3 hr |
| Jun 14, 10:21 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Delaware, Montgomery, Philadelphia | 39 min |
| Jun 14, 10:26 PM EDT | Flash Flood Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 3 hr |
| Jun 14, 10:38 PM EDT | Flash Flood Warning | PHI | Delaware | 3 hr |
| Jun 14, 10:44 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 46 min |
| Jun 14, 10:51 PM EDT | Flash Flood Warning | PHI | Bucks, Philadelphia | 3 hr |
| Jun 14, 10:58 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 47 min |
| Jun 14, 11:16 PM EDT | Severe Thunderstorm Warning | PHI | Philadelphia | 29 min |
| Jun 15, 1:37 AM EDT | Areal Flood Warning | PHI | Delaware | 4 hr |
Nearby
River Flood Warnings in Pennsylvania, 2026Every river flood warning in 2026
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive; the gauge from the NWS water service and the USGS.