Marine Weather and Tide Forecast for Fenwick Island, DE

KEY MESSAGES
1. Below normal temperatures take hold after a strong cold front moves through. Frost and Freeze products are in place for the next two nights, with Monday Night/Tuesday morning being the coldest part of the stretch. A return to above average temperatures then occurs later this week.

2. Minor tidal flooding (advisory level) along the lower Delaware Bay late tonight into early Monday morning.

DISCUSSION
KEY MESSAGE 1...Below normal temperatures take hold after a strong cold front moves through. Frost and Freeze products are in place for the next two nights, with Monday Night/Tuesday morning being the coldest part of the stretch. A return to above average temperatures then occurs later this week.

Cold air works in tonight behind a cold front. Initially, skies will be clear and winds quickly falling off, resulting in temperatures dropping quickly. Increasing cloud cover as the night goes on will prevent the bottom from falling out, though temperatures are likely to drop into the 30s. Some spots even should fall below freezing, mainly in the Poconos and northwestern NJ. In fact, Sussex County, NJ was added to the Freeze Warning for tonight, joining Carbon and Monroe County in PA.

With some moisture at the surface with today's rainfall and temperatures dropping into the 34 to 36 degree range, some Frost is possible outside of the Freeze Warning. A Frost Advisory was issued for interior northern NJ (Warren/Morris/Hunterdon/Somerset)
and Northampton County in PA.

After an uneventful Monday day period, high pressure will then slide over our region on Monday night before gradually shifting offshore during Tuesday. This combined with a clearing sky, winds becoming very light to calm and low dew points will result in efficient radiational cooling conditions Monday night. A widespread freeze looks to occur early Tuesday morning, and the Freeze Watch remains in place except for the immediate coast.
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 the most concern. Frost formation might be somewhat limited given a much drier low-level air mass in place. Outside of the urban city centers and away from the immediate coast, temperatures are expected to drop below freezing. In some cases, well below freezing and into the low 20s.

High temperatures both Monday and Tuesday are forecast to be in the 40s and 50s across the region, which is several degrees below average. A few light rain/snow or graupel showers are possible on Monday as the core of the cold air aloft is overhead along with some mid level energy sliding through with the trough axis. The air mass below cloud base looks rather dry and therefore anything that develops could be mostly virga outside of the higher terrain. It will feel much colder Monday with a breeze and the very dry air in place. A return, southerly, flow will then become established Tuesday and continue into Wednesday. This along with an increase in warm air advection and rising heights will result in temperatures climbing back above average Wednesday through Saturday.

KEY MESSAGE 2...Minor tidal flooding (advisory level) along the lower Delaware Bay late tonight into early Monday morning.

A Coastal Flood Advisory has been issued for the lower Delaware Bay for minor tidal flooding. While winds have shifted offshore into tonight, reducing the coastal flood threat for the oceanside, water levels remain elevated across the bays and tidal waterways that are slower to drain. Being now two days removed from a new moon and a departing storm system, no additional advisory level coastal flooding is expected after tonight's minor tidal flooding ends early this morning.

AVIATION /00Z MONDAY THROUGH FRIDAY/
The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG, KILG, KMIV, KACY and surrounding areas.

Tonight...Mainly VFR conditions expected though a few light showers lingering this evening. Westerly winds decreasing from around 10 kts this evening to 5 kts or less overnight.

Monday...VFR. A few light/brief showers or sprinkles possible during the day. West-northwest wind gusts to 20-25 knots, quickly diminishing at night.

Outlook...

Monday Night through Tuesday Night...VFR. No significant weather.

Wednesday.. MVFR/IFR conditions possible with some showers and low clouds around.

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

MARINE
A Small Craft Advisory is in effect through 11 PM for all Atlantic Ocean coastal waters out to 20 NM as well as the Delaware Bay.

After a tranquil overnight period, winds pick back up for Monday. Gusts could get near 25 kt at times, mainly for Delaware Bay and adjacent ocean zones. Will let current marine headlines run their course before issuing anything for Monday.

Seas of 2 to 4 feet expected through the period.

Outlook...

Monday Night through Friday...No marine headlines expected.

PHI WATCHES/WARNINGS/ADVISORIES
PA...Freeze Watch from late Monday night through Tuesday morning for PAZ054-055-060>062-070-071-101>106.
Freeze Warning from 11 PM this evening to 10 AM EDT Monday for PAZ054-055.
Frost Advisory from 2 AM to 8 AM EDT Monday for PAZ062.
NJ...Freeze Watch from late Monday night through Tuesday morning for NJZ001-007>010-012-013-015>023-027.
Coastal Flood Advisory until 3 AM EDT Monday for NJZ021-023.
Freeze Warning from 11 PM this evening to 10 AM EDT Monday for NJZ001.
Frost Advisory from 2 AM to 8 AM EDT Monday for NJZ007>010.
DE...Freeze Watch from late Monday night through Tuesday morning for DEZ001>003.
Coastal Flood Advisory until 3 AM EDT Monday for DEZ002>004.
MD...Freeze Watch from late Monday night through Tuesday morning for MDZ012-015-019-020.
MARINE...Small Craft Advisory until 11 PM EDT this evening for ANZ430- 431-450>455.