Frost Advisory 1, NWS Philadelphia/Mount Holly

125 
WWUS71 KPHI 120638
NPWPHI

URGENT - WEATHER MESSAGE
National Weather Service Mount Holly NJ
238 AM EDT Sun Apr 12 2026

PAZ060-101-103-121200-
/O.CON.KPHI.FR.Y.0001.000000T0000Z-260412T1200Z/
Berks-Western Chester-Western Montgomery-
Including the cities of Collegeville, Honey Brook, Pottstown,
Oxford, and Reading
238 AM EDT Sun Apr 12 2026

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

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

* WHERE...Berks, Western Chester, and Western Montgomery Counties.

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

* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive 
  outdoor plants may be killed if left uncovered.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

AKL

Area Forecast Discussion
National Weather Service Mount Holly NJ
652 AM EDT Sat Apr 11 2026

.WHAT HAS CHANGED...
A Special Weather Statement has been issued for portions of the
area due to an elevated risk for fire spread today.

Increasing confidence in well above normal temperatures next week
and a legitimate chance for the first 90 degree of 2026 for
Philadelphia.

&&

.KEY MESSAGES...
1. Elevated risk of rapid fire spread expected today behind a
mostly dry cold front. A mainly dry weather pattern continues
through the weekend.

2. A significant warm up is expected for the early and middle part
of next week. Cannot rule out temperatures reaching 90 for the I-95
corridor on Wednesday and Thursday.

&&

.DISCUSSION...
KEY MESSAGE 1...Elevated risk of rapid fire spread expected
today behind a mostly dry cold front. A mainly dry weather
pattern continues through the weekend.

In the wake of the cold front early this morning, cooler and
drier conditions will filter into the region. RH values during
the day today will fall to 25-35%, with breezy conditions.
Northwest winds will gust generally 20-25 mph. These conditions
will lead to fire weather concerns, with any fires that start
potentially able to spread rapidly. A Special Weather Statement
has been issued for southeastern Pennsylvania where low fuel
moistures will lead to the greatest risk of fire spread.

Conditions will be slightly less favorable for fire spread on
Sunday as it appears RH will increase slightly and winds will be
a bit lower.

KEY MESSAGE 2...A significant warm up is expected for the early and
middle part of next week. Cannot rule out temperatures reaching 90
for the I-95 corridor on Wednesday and Thursday.

After a seasonable weekend, a significant warming trend takes place
across the area early next week. High pressure shifts offshore
resulting in a modest return flow. By mid-week, high
temperatures could surge well into the 80s across much of the
area, with overnight lows only falling into the 60s. At this
time, the warmest days appear to be both Wednesday and Thursday,
where there is rather high confidence in mid to upper 80s for
most of the region. Temperatures could even touch 90 in
Philadelphia, which would mark the first 90 degree day of the
year. As is typical in spring though, temperatures near the
coast likely will be 15-25 degrees cooler.

A series of weak disturbances will result in a slight chance to low-
end chance (15-30%) for showers or even an isolated thunderstorm
Tuesday through Thursday, primarily in the evening hours and
primarily for areas northwest of the I-95 corridor. The bulk of the
period will be high and dry however, not good news for the
drought.

&&

.AVIATION /12Z SATURDAY THROUGH WEDNESDAY/...
The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG, KILG,
KMIV, KACY and surrounding areas.

Today...VFR. Northwest winds around 10-15 kt, with gusts of
20-25 kt. Gusts begin to diminish 19-21Z. High confidence.

Tonight...VFR. Winds around 5 kts or less, favoring a northerly
direction. High confidence.

Outlook...

Sunday through Sunday Night...VFR. No significant weather.

Monday through Monday Night...VFR. Slight chance of a
shower/thunderstorm (15-20%) at KRDG/KABE in the afternoon. Wind
gusts out of the southwest around 20-25 kt during the day.

Tuesday through Tuesday Night...VFR. Slight chance of a
shower/thunderstorm (15-20%) at KRDG/KABE in the afternoon.

Wednesday...VFR. Slight chance of a shower/thunderstorm (15-20%) at
KRDG/KABE in the afternoon.

&&

.MARINE...
The Small Craft Advisory that is in effect for all NJ and DE Atlantic
coastal waters remains in effect through 2 PM this afternoon.

West-northwesterly winds 10-15 kt. Seas around 5 feet expected,
decreasing this afternoon.

Sub-SCA conditions tonight with northerly winds around 10 knots
and seas of 3-4 feet.

Outlook...

Sunday...No marine headlines expected.

Sunday Night through Monday Night...SCA conditions likely
(60-70%) as wind gusts out of the southwest near 25 kt and seas
of 5 to 7 feet expected.

Tuesday through Wednesday...No marine headlines expected.

&&

.PHI WATCHES/WARNINGS/ADVISORIES...
PA...None.
NJ...None.
DE...None.
MD...None.
MARINE...Small Craft Advisory until 2 PM EDT this afternoon for
     ANZ450>455.

&&

DISCUSSION...AKL/Hoeflich
AVIATION...AKL/Hoeflich
MARINE...AKL/Hoeflich

Hazardous Weather Outlook
National Weather Service Mount Holly NJ
509 AM EDT Sat Apr 11 2026

MDZ012-015-019-020-120915-
Kent MD-Queen Annes-Talbot-Caroline-
509 AM EDT Sat Apr 11 2026

This Hazardous Weather Outlook is for northeast Maryland.

.DAY ONE...Today and tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

AKL