Alert archive / Pennsylvania / Frost Advisories in 2023

Frost Advisory 8, NWS Philadelphia/Mount Holly

May 17, 2023Hunterdon County, Morris County, Warren County, New Jersey; 6 counties in Pennsylvania

NWS Philadelphia/Mount Holly issued this frost advisory at May 17, 2023, 11:20 AM EDT for Hunterdon County, Morris County, Warren County, New Jersey; 6 counties in Pennsylvania. It took effect at May 18, 2023, 3:00 AM EDT. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued
May 17, 2023, 11:20 AM EDT (15:20 UTC)
In effect from
May 18, 2023, 3:00 AM EDT
Expired
May 18, 2023, 8:00 AM EDT
In force
5 hr
Issued by
NWS Philadelphia/Mount Holly

Counties Hunterdon County, NJ, Morris County, NJ, Warren County, NJ, Berks County, PA, Bucks County, PA, Chester County, PA, Lehigh County, PA, Montgomery County, PA, Northampton County, PA

The radar

The Philadelphia radar (KDIX), 97 km from the middle of the area, began a volume at 15:35 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 nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 3.3 hours before the alert went out and 207 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Brookhaven, NY at 12:00Z on 2023-05-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2023-05-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -109 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1143 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
-109 m²/s²
0-3 km storm-relative helicity
25 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

589 
WWUS71 KPHI 171520
NPWPHI

URGENT - WEATHER MESSAGE
National Weather Service Mount Holly NJ
1120 AM EDT Wed May 17 2023

NJZ001-PAZ054-055-180800-
/O.UPG.KPHI.FZ.A.0002.230518T0500Z-230518T1200Z/
/O.NEW.KPHI.FZ.W.0004.230518T0500Z-230518T1200Z/
Sussex-Carbon-Monroe-
Including the cities of Newton, Jim Thorpe, and Stroudsburg
1120 AM EDT Wed May 17 2023

...FREEZE WARNING IN EFFECT FROM 1 AM TO 8 AM EDT THURSDAY...

* WHAT...Sub-freezing temperatures of 28 to 32 expected.

* WHERE...In New Jersey, Sussex. In Pennsylvania, Carbon and 
  Monroe.

* WHEN...From 1 AM to 8 AM EDT Thursday.

* IMPACTS...Frost and freeze conditions will kill crops and 
  other sensitive vegetation.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants and vegetation from the
cold. Potted plants should be brought inside.

&&

$$

NJZ007>009-PAZ060>062-101-103-105-180800-
/O.NEW.KPHI.FR.Y.0008.230518T0700Z-230518T1200Z/
Warren-Morris-Hunterdon-Berks-Lehigh-Northampton-Western Chester-
Western Montgomery-Upper Bucks-
Including the cities of Washington, Morristown, Flemington, 
Reading, Allentown, Bethlehem, Easton, Honey Brook, Oxford, 
Collegeville, Pottstown, Chalfont, and Perkasie
1120 AM EDT Wed May 17 2023

...FROST ADVISORY IN EFFECT FROM 3 AM TO 8 AM EDT THURSDAY...

* WHAT...Temperatures as low as 35 will result in frost 
  formation.

* WHERE...In New Jersey, Warren, Morris and Hunterdon. In 
  Pennsylvania, Berks, Lehigh, Northampton, Western Chester, 
  Western Montgomery and Upper Bucks.

* WHEN...From 3 AM to 8 AM EDT Thursday.

* IMPACTS...Frost could kill sensitive outdoor vegetation if 
  left uncovered.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants and vegetation from the
cold. Potted plants should be brought inside.

&&

$$

Gorse
3 follow-up statements
792 
WWUS71 KPHI 171929
NPWPHI

URGENT - WEATHER MESSAGE
National Weather Service Mount Holly NJ
329 PM EDT Wed May 17 2023

NJZ001-PAZ054-055-181200-
/O.CON.KPHI.FZ.W.0004.230518T0500Z-230518T1200Z/
Sussex-Carbon-Monroe-
Including the cities of Newton, Jim Thorpe, and Stroudsburg
329 PM EDT Wed May 17 2023

...FREEZE WARNING REMAINS IN EFFECT FROM 1 AM TO 8 AM EDT
THURSDAY...

* WHAT...Sub-freezing temperatures of 28 to 32 expected.

* WHERE...In New Jersey, Sussex. In Pennsylvania, Carbon and 
  Monroe.

* WHEN...From 1 AM to 8 AM EDT Thursday.

* IMPACTS...Frost and freeze conditions will kill crops and 
  other sensitive vegetation.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants and vegetation from the
cold. Potted plants should be brought inside.

&&

$$

NJZ007>009-PAZ060>062-101-103-105-181200-
/O.CON.KPHI.FR.Y.0008.230518T0700Z-230518T1200Z/
Warren-Morris-Hunterdon-Berks-Lehigh-Northampton-Western Chester-
Western Montgomery-Upper Bucks-
Including the cities of Washington, Morristown, Flemington, 
Reading, Allentown, Bethlehem, Easton, Honey Brook, Oxford, 
Collegeville, Pottstown, Chalfont, and Perkasie
329 PM EDT Wed May 17 2023

...FROST ADVISORY REMAINS IN EFFECT FROM 3 AM TO 8 AM EDT
THURSDAY...

* WHAT...Temperatures as low as 34 will result in frost 
  formation.

* WHERE...In New Jersey, Warren, Morris and Hunterdon. In 
  Pennsylvania, Berks, Lehigh, Northampton, Western Chester, 
  Western Montgomery and Upper Bucks.

* WHEN...From 3 AM to 8 AM EDT Thursday.

* IMPACTS...Frost could kill sensitive outdoor vegetation if 
  left uncovered.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants and vegetation from the
cold. Potted plants should be brought inside.

&&

$$

Gorse
150 
WWUS71 KPHI 180716
NPWPHI

URGENT - WEATHER MESSAGE
National Weather Service Mount Holly NJ
316 AM EDT Thu May 18 2023

NJZ001-PAZ054-055-181200-
/O.CON.KPHI.FZ.W.0004.000000T0000Z-230518T1200Z/
Sussex-Carbon-Monroe-
Including the cities of Newton, Jim Thorpe, and Stroudsburg
316 AM EDT Thu May 18 2023

...FREEZE WARNING REMAINS IN EFFECT UNTIL 8 AM EDT THIS MORNING...

* WHAT...Sub-freezing temperatures as low as 29.

* WHERE...In New Jersey, Sussex. In Pennsylvania, Carbon and 
  Monroe.

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

* IMPACTS...Frost and freeze conditions will kill crops and 
  other sensitive vegetation.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

NJZ007>009-PAZ060>062-101-103-105-181200-
/O.CON.KPHI.FR.Y.0008.000000T0000Z-230518T1200Z/
Warren-Morris-Hunterdon-Berks-Lehigh-Northampton-Western Chester-
Western Montgomery-Upper Bucks-
Including the cities of Washington, Morristown, Flemington, 
Reading, Allentown, Bethlehem, Easton, Honey Brook, Oxford, 
Collegeville, Pottstown, Chalfont, and Perkasie
316 AM EDT Thu May 18 2023

...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM EDT THIS MORNING...

* WHAT...Temperatures as low as 35 will result in frost 
  formation.

* WHERE...In New Jersey, Warren, Morris and Hunterdon. In 
  Pennsylvania, Berks, Lehigh, Northampton, Western Chester, 
  Western Montgomery and Upper Bucks.

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

* IMPACTS...Frost could kill sensitive outdoor vegetation if 
  left uncovered.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

MPS
079 
WWUS71 KPHI 181155
NPWPHI

URGENT - WEATHER MESSAGE
National Weather Service Mount Holly NJ
755 AM EDT Thu May 18 2023

NJZ001-PAZ054-055-181300-
/O.EXP.KPHI.FZ.W.0004.000000T0000Z-230518T1200Z/
Sussex-Carbon-Monroe-
Including the cities of Newton, Jim Thorpe, and Stroudsburg
755 AM EDT Thu May 18 2023

...FREEZE WARNING WILL EXPIRE AT 8 AM EDT THIS MORNING...

Temperatures are quickly increasing this morning and therefore 
this Freeze Warning will expire at 8 AM.

$$

NJZ007>009-PAZ060>062-101-103-105-181300-
/O.EXP.KPHI.FR.Y.0008.000000T0000Z-230518T1200Z/
Warren-Morris-Hunterdon-Berks-Lehigh-Northampton-Western Chester-
Western Montgomery-Upper Bucks-
Including the cities of Washington, Morristown, Flemington, 
Reading, Allentown, Bethlehem, Easton, Honey Brook, Oxford, 
Collegeville, Pottstown, Chalfont, and Perkasie
755 AM EDT Thu May 18 2023

...FROST ADVISORY WILL EXPIRE AT 8 AM EDT THIS MORNING...

Temperatures are quickly increasing this morning and therefore 
this Frost Advisory will expire at 8 AM.

$$

Gorse

What forecasters said that day

The local office's own words before this frost advisory 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 frost advisory went out at May 17, 9:30 AM EDT, 1 hour 50 minutes earlier.

Area forecast discussion, May 17, 9:30 AM EDT, 1 hour 50 minutes before
Area Forecast Discussion
National Weather Service Mount Holly NJ
930 AM EDT Wed May 17 2023

.SYNOPSIS...
High pressure moves in from the northwest and remains in
control through Thursday night before sliding offshore. A weak
area of low pressure will move up the coast on Friday night,
with a cold front approaching from the west on Saturday. The
front passes on Saturday night, with high pressure moving in on
Sunday and remaining in place through the early part of next
week.

&&

.NEAR TERM /THROUGH TONIGHT/...
As of 925 AM, the surface cold front is south of our area with
a weak area of low pressure along it well east of the Delmarva
coast. Much drier low-level air continues to settle in from the
north under a northerly breeze. A band of high level smoke from
western Canadian wildfires continues to slide across our
southern areas, with this tending to push gradually southward.
This is resulting in a milky/hazy sky. The going forecast looks
to be in good shape, with just some tweaks made to the hourly
grids to keep them current based on the latest
observations/trends.

Otherwise, the mid level trough over eastern Canada and the
northeastern states will begin to pull away to the east today and
tonight, but not before one final short wave drops southeastward
over our region this afternoon. The feature will have little
moisture associated with it, so it should pass unnoticed.

Surface high pressure will build southeastward from northern
Ontario with its center reaching New York State and Pennsylvania
late tonight. The air mass will bring cool dry weather
conditions to our region for today and tonight.

A northerly wind 10 to 20 MPH with gusts to 25 MPH is anticipated
for today. Wind speeds will diminish tonight.

Today's high temperatures are expected to favor the 60s, with
some readings in the lower 70s in eastern Maryland, Delaware and
southern New Jersey. Temperatures should not get above the 50s
in the elevated terrain of the Poconos and far northern New
Jersey.

Tonight's minimum temperatures are forecast to be in the 30s
and 40s. Readings should drop to or just below freezing in parts
of the Pocono Region and far northern New Jersey. As a result,
we have issued a Freeze Watch for the Pennsylvania counties of
Carbon and Monroe, and for Sussex County in New Jersey. The air
mass is quite dry and a light wind may linger through much of
the night to preclude the development of any widespread frost in
the other areas that will fall into the 30s.

&&

.SHORT TERM /THURSDAY THROUGH FRIDAY/...
The end of the week looks rather quiet as a mid-level ridge
builds in from the west. High pressure will be centered just to
our north on Thursday morning, fostering a light onshore flow
through the day. This will bring an increase to low-level
moisture with flow coming off the Atlantic. Winds look to be
much weaker compared to today as well, limiting fire weather
concerns. Cooler onshore flow will result in below normal
temperatures for Thursday. Looking at highs in the 60s for most
with some spots along the immediate coast struggling to get out
of the 50s. Skies will be mostly clear overall. Overnight lows
will generally be in 40s, with areas in the urban corridor and
Delmarva staying right around 50.

For Friday, high pressure moves offshore and flow is expected
to turn more southerly. This will result in temperatures
moderating a bit, getting into the upper 60s/low 70s. Cloud
cover is expected to increase as a weak area of low pressure off
the Carolinas slowly progresses northward, but we should not
see any precipitation from this system through the day on
Friday. Should just be a partly cloudy day overall, though some
unsettled weather is on the way for the weekend.

&&

.LONG TERM /FRIDAY NIGHT THROUGH TUESDAY/...
The next chance for rain begins on Friday night as an area of
low pressure moves up the coast from the Carolinas. It does look
like this weak system will get to our coastal waters prior to
the arrival of the cold front, which could bring some showers to
areas near the coast, especially in the southern portion of the
region. Showers look to move in late Friday night/early
Saturday morning, continuing into the day Saturday as the system
moves north. Have adjusted PoPS a touch upward east of the I-95
corridor on Saturday morning to account for this, but have
capped PoPs at high-end Chc due to the uncertain nature of this
coastal system. Overnight lows Friday into Saturday will be in
the low to mid 50s.

In terms of the incoming frontal system this weekend, overnight
deterministic and ensemble guidance has come into more
agreement overall. The trend has been a bit weaker with the
incoming trough from the Great Lakes region. In terms of timing,
the majority of guidance has the front coming through late
Saturday night, with the bulk of the showers ahead of the front
moving through Saturday afternoon and evening. Due to the
weakening trend and weaker forcing, have again capped PoPs at
high-end Chc for the most part, with the exception of northern
areas, where Likely PoPs have been introduced as it looks like
the strongest forcing will be present in the northern part of
our CWA. Instability remains on the lower side, so have kept out
the mention of thunder that the previous forecast had.
Temperatures on Saturday will be around average for mid-May.

Once the front clears, high pressure will build in from the
west and remain in control through the early part of next week.
There could be a lingering shower near the coast on Sunday
morning, but once that moves out, it looks dry and tranquil
through Tuesday. The passing front will knock down dewpoints a
good 10-15 degrees, but temperatures should stay steady overall
through the early part of next week, staying right around
seasonal norms.

&&

.AVIATION /14Z WEDNESDAY THROUGH SUNDAY/...
The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG,
KILG, KMIV, KACY and surrounding areas.

Rest of today...VFR. Northerly winds 10-15 knots with gusts 20-25
knots. High confidence.

Tonight...VFR. North winds diminishing to 5-10 knots and becoming
northeast, with some terminals going light and variable. High
confidence.

Outlook...

Thursday through Thursday Night...VFR. East/Southeast winds
around 5- 10 kt. High confidence.

Friday through Friday Night...VFR. South/Southeast winds around
5-10 kt. High confidence.

Saturday through Saturday Night...sub-VFR conditions possible
as showers move through ahead of a cold front. East/southeast
winds in the morning, becoming west/southwesterly in the
afternoon around 5-10 kt with gusts in the mid to upper teens.
Low confidence.

Sunday...Primarily VFR though some lingering restrictions
possible in the morning. Northwest winds around 10 kt. Moderate
confidence.

&&

.MARINE...
A northerly wind around 15 knots with gusts into the lower 20s
is expected for the coastal waters of Delaware and New Jersey
for today. The wind is anticipated to veer toward the northeast
tonight. While some gusts around 25 knots are possible, they
should not be widespread enough to warrant a Small Craft
Advisory.

Waves are forecast to be 3 to 4 feet on our ocean waters, and 2
feet or less on Delaware Bay.

Outlook...

Thursday through Friday...No marine headlines expected.
East/Southeast winds around 10-15 kt with gusts around 20 kt.
Seas 2 to 4 feet.

Friday Night through Saturday...SCA conditions possible.
South/Southeast winds around 10-15 kt and gusts around 20 kt.
Seas 3 to 6 feet.

Saturday Night...SCA conditions possible. West/Southwest winds
around 10-15 kt and gusts around 20 kt. Seas 3 to 5 feet.

Sunday...No marine headlines expected. Northwest winds in the
morning will come around to the south by the afternoon. Wind
speeds around 10 kt with gusts in the mid to upper teens. Seas 2
to 4 feet.

&&

.FIRE WEATHER...
Relative humidity values are forecast to drop into the 20 to 25
percent range today in much of eastern Pennsylvania and New Jersey.
A northerly wind 10 to 20 MPH with gusts around 25 MPH is expected.
As a result, there will be a heightened fire weather concern for
parts of the region.

We will continue the Red Flag Warning for today in the New
Jersey counties of Atlantic, Gloucester, Camden, Burlington and
Ocean to cover the Pine Barrens which are quite susceptible due
to the recent dry conditions. A Special Weather Statement will
be used for the remainder of New Jersey, excluding the coastal
strip. The Special Weather Statement will also include the
Pocono Region of Pennsylvania. For the Lehigh Valley and
southeastern Pennsylvania, the spring green-up and the current
fuel moisture levels should preclude any significant fire
weather concerns for those areas. The same is true for our
counties in eastern Maryland and Delaware based on coordination
with our state partners.

Conditions improve on Thursday as winds relax and shift to the
east/southeast. This will bring a slight rise in dewpoints/RH values
and with winds only expected to be 5-10 MPH, the fire weather risk
will be much lower compared to today.

Beyond Thursday, no fire weather concerns are expected.

&&

.PHI WATCHES/WARNINGS/ADVISORIES...
PA...Freeze Watch from late tonight through Thursday morning for
     PAZ054-055.
NJ...Freeze Watch from late tonight through Thursday morning for
     NJZ001.
     Red Flag Warning until 8 PM EDT this evening for NJZ017>020-
     022-027.
DE...None.
MD...None.
MARINE...None.

&&

SYNOPSIS...Hoeflich
NEAR TERM...Gorse/Iovino
SHORT TERM...Hoeflich
LONG TERM...Hoeflich
AVIATION...Gorse/Hoeflich/Iovino
MARINE...Hoeflich/Iovino
FIRE WEATHER...Hoeflich/Iovino
Hazardous weather outlook, May 17, 10:55 AM EDT, 25 minutes before
Hazardous Weather Outlook
National Weather Service Mount Holly NJ
1055 AM EDT Wed May 17 2023

DEZ001-181455-
New Castle-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for New Castle County in Delaware.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

DEZ002-181455-
Kent-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for Kent County in Delaware.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

DEZ003-181455-
Inland Sussex-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for inland portions of Sussex County
in Delaware.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

DEZ004-181455-
Delaware Beaches-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for the Atlantic coastal portions of
Sussex County in Delaware.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

PAZ054-181455-
Carbon-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for Carbon County in Pennsylvania.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

PAZ055-181455-
Monroe-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for Monroe County in Pennsylvania.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

PAZ060-181455-
Berks-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for Berks County in Pennsylvania.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

PAZ061-181455-
Lehigh-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for Lehigh County in Pennsylvania.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

PAZ062-181455-
Northampton-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for Northampton County in
Pennsylvania.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

PAZ070-181455-
Delaware-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for Delaware County in Pennsylvania.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

PAZ071-181455-
Philadelphia-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for Philadelphia County in
Pennsylvania.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

PAZ101-181455-
Western Chester-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for western Chester County in
Pennsylvania.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

PAZ102-181455-
Eastern Chester-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for eastern Chester County in
Pennsylvania.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

PAZ103-181455-
Western Montgomery-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for western Montgomery County in
Pennsylvania.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

PAZ104-181455-
Eastern Montgomery-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for eastern Montgomery County in
Pennsylvania.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

PAZ105-181455-
Upper Bucks-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for upper Bucks County in
Pennsylvania.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

PAZ106-181455-
Lower Bucks-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for lower Bucks County in
Pennsylvania.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ001-181455-
Sussex-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for Sussex County in New Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ007-181455-
Warren-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for Warren County in New Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ008-181455-
Morris-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for Morris County in New Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ009-181455-
Hunterdon-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for Hunterdon County in New Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ010-181455-
Somerset-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for Somerset County in New Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ012-181455-
Middlesex-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for Middlesex County in New Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ013-181455-
Western Monmouth-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for western Monmouth County in New
Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ014-181455-
Eastern Monmouth-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for eastern Monmouth County in New
Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ015-181455-
Mercer-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for Mercer County in New Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ016-181455-
Salem-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for Salem County in New Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ017-181455-
Gloucester-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for Gloucester County in New Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ018-181455-
Camden-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for Camden County in New Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ019-181455-
Northwestern Burlington-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for northwestern Burlington County in
New Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ020-181455-
Ocean-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for inland portions of Ocean County
in New Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ021-181455-
Cumberland-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for Cumberland County in New Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ022-181455-
Atlantic-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for inland portions of Atlantic
County in New Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ023-181455-
Cape May-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for Cape May County excluding the
Atlantic coast in New Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ024-181455-
Atlantic Coastal Cape May-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for the Atlantic coastal portions of
Cape May County in New Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ025-181455-
Coastal Atlantic-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for coastal portions of Atlantic
County in New Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ026-181455-
Coastal Ocean-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for coastal portions of Ocean County
in New Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ027-181455-
Southeastern Burlington-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for southeastern Burlington County in
New Jersey.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

MDZ012-181455-
Kent MD-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for Kent County in Maryland.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

MDZ015-181455-
Queen Annes-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for Queen Annes County in Maryland.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

MDZ019-181455-
Talbot-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for Talbot County in Maryland.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

MDZ020-181455-
Caroline-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for Caroline County in Maryland.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

ANZ430-181455-
Delaware Bay waters north of East Point NJ to Slaughter Beach DE-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for upper Delaware Bay.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

ANZ431-181455-
Delaware Bay waters south of East Point NJ to Slaughter Beach DE-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for lower Delaware Bay.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

ANZ450-181455-
Coastal waters from Sandy Hook to Manasquan Inlet NJ out 20 nm-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for the Atlantic coastal waters
adjacent to Monmouth County out 20 nm.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

ANZ451-181455-
Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20 nm-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for the Atlantic coastal waters
adjacent to Ocean County out 20 nm.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

ANZ452-181455-
Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out 20 nm-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for the Atlantic coastal waters
adjacent to Atlantic County out 20 nm.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

ANZ453-181455-
Coastal waters from Great Egg Inlet to Cape May NJ out 20 nm-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for the Atlantic coastal waters
adjacent to Cape May County out 20 nm.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

ANZ454-181455-
Coastal waters from Cape May NJ to Cape Henlopen DE out 20 nm-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for the Atlantic coastal waters
adjacent to the mouth of Delaware Bay out 20 nm.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

ANZ455-181455-
Coastal waters from Cape Henlopen to Fenwick Island DE out 20 nm-
1055 AM EDT Wed May 17 2023

This Hazardous Weather Outlook is for the Atlantic coastal waters
adjacent to Sussex County out 20 nm.

.DAY ONE...Through tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 17, 3:34 AM EDTFreeze WatchPHISussex8 hr
May 17, 11:20 AM EDTFreeze WarningPHISussex21 hr

Nearby

Frost Advisories in Pennsylvania, 2023Frost Advisories in New Jersey, 2023Every frost advisory in 2023

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.