Small Craft Advisory 45, NWS Philadelphia/Mount Holly

290 
WHUS71 KPHI 211812
MWWPHI

URGENT - MARINE WEATHER MESSAGE
National Weather Service Mount Holly NJ
212 PM EDT Tue Apr 21 2026

ANZ450>452-220830-
/O.EXT.KPHI.SC.Y.0045.260422T0600Z-260422T1700Z/
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-
Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out
20 NM-
212 PM EDT Tue Apr 21 2026

...SMALL CRAFT ADVISORY NOW IN EFFECT FROM 2 AM TO 1 PM EDT
WEDNESDAY...

* WHAT...South winds 15 to 20 kt with gusts up to 30 kt and seas 
  3 to 5 ft expected.

* WHERE...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 and Coastal waters from Little Egg Inlet to 
  Great Egg Inlet NJ out 20 NM.

* WHEN...From 2 AM to 1 PM EDT Wednesday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

ANZ430-431-220830-
/O.CON.KPHI.SC.Y.0045.260422T0600Z-260422T1200Z/
Delaware Bay waters north of East Point NJ to Slaughter Beach DE-
Delaware Bay waters south of East Point NJ to Slaughter Beach DE-
212 PM EDT Tue Apr 21 2026

...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 2 AM TO 8 AM EDT
WEDNESDAY...

* WHAT...South winds 15 to 20 kt with gusts up to 25 kt and 
  choppy waters expected.

* WHERE...Delaware Bay waters north of East Point NJ to 
  Slaughter Beach DE and Delaware Bay waters south of East Point 
  NJ to Slaughter Beach DE.

* WHEN...From 2 AM to 8 AM EDT Wednesday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

ANZ453>455-220830-
/O.CON.KPHI.SC.Y.0045.260422T0600Z-260422T1500Z/
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-
212 PM EDT Tue Apr 21 2026

...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 2 AM TO 11 AM EDT
WEDNESDAY...

* WHAT...South winds 15 to 20 kt with gusts up to 30 kt and seas 
  3 to 5 ft expected.

* WHERE...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 and Coastal waters from Cape Henlopen to Fenwick Island 
  DE out 20 NM.

* WHEN...From 2 AM to 11 AM EDT Wednesday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

DeSilva

434 
WHUS71 KPHI 220629
MWWPHI

URGENT - MARINE WEATHER MESSAGE
National Weather Service Mount Holly NJ
229 AM EDT Wed Apr 22 2026

ANZ453>455-221700-
/O.EXT.KPHI.SC.Y.0045.000000T0000Z-260422T1700Z/
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-
229 AM EDT Wed Apr 22 2026

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 1 PM EDT THIS
AFTERNOON...

* WHAT...South winds 15 to 25 kt with gusts up to 30 kt and seas 
  3 to 5 ft.

* WHERE...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 and Coastal waters from Cape Henlopen to Fenwick Island 
  DE out 20 NM.

* WHEN...Until 1 PM EDT this afternoon.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

ANZ450>452-221900-
/O.EXT.KPHI.SC.Y.0045.000000T0000Z-260422T1900Z/
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-
Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out
20 NM-
229 AM EDT Wed Apr 22 2026

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 3 PM EDT THIS
AFTERNOON...

* WHAT...South winds 15 to 20 kt with gusts up to 30 kt and seas 
  3 to 5 ft.

* WHERE...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 and Coastal waters from Little Egg Inlet to 
  Great Egg Inlet NJ out 20 NM.

* WHEN...Until 3 PM EDT this afternoon.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

ANZ430-431-221200-
/O.CON.KPHI.SC.Y.0045.000000T0000Z-260422T1200Z/
Delaware Bay waters north of East Point NJ to Slaughter Beach DE-
Delaware Bay waters south of East Point NJ to Slaughter Beach DE-
229 AM EDT Wed Apr 22 2026

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 8 AM EDT THIS
MORNING...

* WHAT...South winds 15 to 25 kt with gusts up to 30 kt and 
  rough waters.

* WHERE...Delaware Bay waters north of East Point NJ to 
  Slaughter Beach DE and Delaware Bay waters south of East Point 
  NJ to Slaughter Beach DE.

* WHEN...Until 8 AM EDT this morning.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

Guzzo

231 
WHUS71 KPHI 221050
MWWPHI

URGENT - MARINE WEATHER MESSAGE
National Weather Service Mount Holly NJ
650 AM EDT Wed Apr 22 2026

ANZ430-431-221200-
/O.CAN.KPHI.SC.Y.0045.000000T0000Z-260422T1200Z/
Delaware Bay waters north of East Point NJ to Slaughter Beach DE-
Delaware Bay waters south of East Point NJ to Slaughter Beach DE-
650 AM EDT Wed Apr 22 2026

...SMALL CRAFT ADVISORY IS CANCELLED...

Winds have fallen below Small Craft Advisory criteria, so the
advisory has been able to be cancelled early.

$$

ANZ453>455-221700-
/O.CON.KPHI.SC.Y.0045.000000T0000Z-260422T1700Z/
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-
650 AM EDT Wed Apr 22 2026

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 1 PM EDT THIS
AFTERNOON...

* WHAT...South winds 15 to 20 kt with gusts up to 30 kt and seas 
  3 to 5 ft.

* WHERE...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 and Coastal waters from Cape Henlopen to Fenwick Island 
  DE out 20 NM.

* WHEN...Until 1 PM EDT this afternoon.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

ANZ450>452-221900-
/O.CON.KPHI.SC.Y.0045.000000T0000Z-260422T1900Z/
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-
Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out
20 NM-
650 AM EDT Wed Apr 22 2026

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 PM EDT THIS
AFTERNOON...

* WHAT...South winds 15 to 20 kt with gusts up to 30 kt and seas 
  4 to 5 ft.

* WHERE...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 and Coastal waters from Little Egg Inlet to 
  Great Egg Inlet NJ out 20 NM.

* WHEN...Until 3 PM EDT this afternoon.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

Guzzo

708 
WHUS71 KPHI 221645
MWWPHI

URGENT - MARINE WEATHER MESSAGE
National Weather Service Mount Holly NJ
1245 PM EDT Wed Apr 22 2026

ANZ450>452-221745-
/O.CAN.KPHI.SC.Y.0045.000000T0000Z-260422T1900Z/
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-
Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out
20 NM-
1245 PM EDT Wed Apr 22 2026

...SMALL CRAFT ADVISORY IS CANCELLED...

Seas continue to subside to less than 5 feet. Therefore, the Small
Craft Advisory is no longer in effect.

$$

ANZ453>455-221745-
/O.CAN.KPHI.SC.Y.0045.000000T0000Z-260422T1700Z/
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-
1245 PM EDT Wed Apr 22 2026

...SMALL CRAFT ADVISORY IS CANCELLED...

Seas continue to subside to less than 5 feet. Therefore, the Small
Craft Advisory is no longer in effect.

$$

MPS

Area Forecast Discussion
National Weather Service Mount Holly NJ
150 AM EDT Tue Apr 21 2026

.WHAT HAS CHANGED...

The aviation section has been updated.

&&

.KEY MESSAGES...
1. A widespread freeze is expected to occur tonight as an unusually
cold airmass settles over the area.

2. A return to above average temperatures later this week before
cooling down again over the weekend. Widespread rainfall possible
over the weekend.

&&

.DISCUSSION...
KEY MESSAGE 1...A widespread freeze is expected to occur tonight as
an unusually cold airmass settles over the area.

In wake of departing cold front, a rather strong area of high
pressure quickly builds over central Pennsylvania tonight. This high
will cause northwest winds to diminish quickly through the evening
hours and lead to an exceptional night for radiational cooling under
clear skies. Not only will the airmass be unusually cold, but it
will be quite dry with dew points falling into the low teens to low
20s. Under these atmospheric conditions, the boundary layer should
decouple, so have opted to blend in some colder guidance, lowering
lows for tonight into the low 20s to low 30s for areas away from the
coast. Freeze Warnings remain in effect tonight, and have added
Coastal Monmouth County into the Warning as well. For more
information regarding daily low temperature records, please refer to
the Climate Section below.

For remaining coastal locales, from Coastal Ocean to Coastal Sussex,
thinking that may be enough of a marine influence to keep temps in
these areas from falling below freezing. While some patchy frost is
possible in these areas, it may not be widespread due to winds
remaining elevated. Nonetheless, lows will fall into in the mid to
upper 30s in these areas.

As a reminder, all of our counties now have an active growing season
due to the recent excessive warmth. Blooms/vegetation have quickly
initiated and in some cases are ahead of schedule. Fruit trees and
other cold sensitive plants already planted are of the most concern.
Frost formation might be somewhat limited given a dry low-level
airmass in place tonight.

KEY MESSAGE 2...A return to above average temperatures later this
week before cooling down again over the weekend. Some showers
expected on Wednesday morning with more widespread rainfall
possible over the weekend.

It is not anticipated to be as cold Tuesday night as the air
mass continues to modify and clouds increase with high pressure
now well offshore. A return, southerly, flow will also become
established Tuesday and continue Wednesday. This along with an
increase in warm air advection and rising heights will result in
temperatures climbing back above average Wednesday through
Friday. Highs for most of the area are forecast to be in the
mid/upper 60s Wednesday, then into the 70s for Thursday and
Friday. A front may arrive Friday Night into Saturday with some
showers, and with the low-level flow more onshore it will bring
in some cooling starting Friday especially closer to the coast.
If the marine influence ends up being stronger Friday into
Saturday, then more low clouds may come into play along with
even cooler temperatures.

In terms of rainfall, a weak area of low pressure slides by
Wednesday morning bringing some showers. Rainfall amounts
generally up to a tenth of an inch are expected. Another area
of low pressure may arrive during the weekend, especially for
Sunday, bringing the potential for widespread showers or a
period of rain. The strength and timing of the involved features
for the weekend however is lower confidence. The pattern that
is currently indicated among the model guidance however would
result in temperatures dropping to average or below average over
the weekend, with an increased chance for rainfall.

&&

.AVIATION /06Z TUESDAY THROUGH SATURDAY/...
The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG, KILG,
KMIV, KACY and surrounding areas.

Rest of Tonight...VFR with a mainly clear sky. A north wind
around 5 kt becoming light and variable at times. High
confidence.

Tuesday...VFR with increasing clouds, particularly for the
afternoon. A north wind in the morning, transitions to southwest
around 5-10 kt in the afternoon. In the evening, winds turn
more southerly at 5-10 kt. High confidence.

Tuesday night...Mainly VFR. MVFR conditions possible in any rain
showers but was too low confidence to include in the TAF
currently. Winds remain out of the south at 5-10 kt.

Outlook...

Wednesday...MVFR/IFR conditions expected especially in the
morning with showers and low clouds around.

Wednesday Night through Friday...VFR. No significant weather.

Friday Night through Saturday...Sub-VFR conditions likely at
times with showers and low clouds moving through.

&&

.MARINE...
No marine headlines are in effect through Tuesday. North-northwest
winds around 10-20 kt are expected to continue through tonight
before diminishing to 5-10 kt by Tuesday morning. Winds will
gradually shift to south-southeast around 10 kt by Tuesday
afternoon. Seas around 2-3 feet.

Aside for some rain/graupel showers expected this afternoon, fair
weather is expected through Tuesday.

Outlook...

Tuesday Night/Wednesday Morning...Small Craft Advisory
conditions possible (30-40%) with wind gusts near 25 kt.

Wednesday Afternoon through Saturday...No marine headlines
expected.

&&

.CLIMATE...
Record low temperatures are possible at some climate sites for
Tuesday, April 21st. Below are the daily low temperature
records for 4/21:

Daily Record Low Temperatures
                         April 21
Site                  Record/Year
Allentown (ABE)           28/1925 & 1956 & 2018
AC Airport (ACY)          25/1981
AC Marina (55N)           26/1875
Georgetown (GED)          27/1961
Mount Pocono (MPO)        11/1908
Philadelphia (PHL)        27/1875
Reading (RDG)             26/1982
Trenton (TTN)             30/1907 & 1925
Wilmington (ILG)          28/1925

&&

.PHI WATCHES/WARNINGS/ADVISORIES...
PA...Freeze Warning until 9 AM EDT this morning for PAZ060>062-070-
     071-101>106.
     Freeze Warning until 10 AM EDT this morning for PAZ054-055.
NJ...Freeze Warning until 9 AM EDT this morning for NJZ007>010-
     012>023-027.
     Freeze Warning until 10 AM EDT this morning for NJZ001.
DE...Freeze Warning until 9 AM EDT this morning for DEZ001.
     Freeze Warning until 9 AM EDT this morning for DEZ002-003.
MD...Freeze Warning until 9 AM EDT this morning for MDZ012-015-019-
     020.
MARINE...None.

&&

DISCUSSION...DeSilva/Hoeflich
AVIATION...Guzzo/Hoeflich
MARINE...DeSilva/Hoeflich

Hazardous Weather Outlook
National Weather Service Mount Holly NJ
506 AM EDT Mon Apr 20 2026

MDZ012-015-019-020-210915-
Kent MD-Queen Annes-Talbot-Caroline-
506 AM EDT Mon Apr 20 2026

...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM EDT
TUESDAY...

This Hazardous Weather Outlook is for northeast Maryland.

.DAY ONE...Today and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Freeze Warning.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Freeze Warning.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.