Sunrise 6:15 AM   Sunset 7:53 PM Moonrise 6:51 PM   Moonset 4:59 AM

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ANZ538 Patapsco River Including Baltimore Harbor- 146 Am Edt Tue Apr 23 2024
.small craft advisory in effect from this afternoon through late tonight - .
Overnight - SW winds 5 kt. Waves flat. Tue - SW winds around 5 kt - .becoming S 10 to 15 kt with gusts to 20 kt in the afternoon. Waves 1 ft or less. Tue night - S winds 10 to 15 kt - .becoming sw 5 to 10 kt late. Gusts up to 20 kt. Waves 1 ft. Scattered showers. Wed - W winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. Scattered showers. Wed night - N winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. Thu - NE winds 5 to 10 kt. Gusts up to 20 kt in the morning. Waves 1 ft. Thu night - SE winds 5 to 10 kt. Waves 1 ft. Fri - SE winds 5 to 10 kt. Waves 1 ft. Sat - SE winds 10 to 15 kt - .becoming S after midnight. Waves 1 ft.

ANZ500 146 Am Edt Tue Apr 23 2024
Synopsis for the tidal potomac and md portion of the chesapeake bay -
high pressure will move offshore later today. A cold front will cross the area Wednesday. High pressure will return for the end of the week. Small craft advisories will likely be needed through Thursday morning.

FXUS61 KLWX 230042 AFDLWX

Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 842 PM EDT Mon Apr 22 2024

SYNOPSIS
High pressure will build overhead tonight, before departing off to the east tomorrow. A cold front will move through Wednesday, before high pressure builds back in for the end of the week.

NEAR TERM /THROUGH TONIGHT/
EVENING UPDATE: No changes in the near term forecast, but have added a fire weather section below for Tuesday and perhaps Wednesday as well.

High pressure will build overhead tonight. Wind will go calm beneath the high, and clear skies are expected. This will create ideal conditions for radiational cooling. As a result, another chilly night is expected, with temperatures dropping back into the 30s for most. The exceptions will be the ridgetops, as well as downtown DC and Baltimore, which will stay in the 40s. Freeze Warnings are in effect tonight for the Central Shenandoah Valley, as well as portions of the Potomac Highlands. Frost Advisories are in effect for much of the rest of the forecast area. The exceptions are the Alleghenies (where the growing season hasn't started yet), as well as St. Mary's and Calvert Counties, where temperatures are expected to stay in the upper 30s to around 40.

SHORT TERM /6 AM TUESDAY MORNING THROUGH WEDNESDAY NIGHT/
High pressure will progress offshore tomorrow, which will cause winds to turn out of the south. This will result in a warming trend, with temperatures climbing into the upper 60s to low 70s beneath mostly sunny skies.

A shortwave will track southeastward from the Great Lakes toward the Northeast/Mid-Atlantic Tuesday night. It will be a rather moisture starved system, so precipitation totals are expected to be light. A few showers will be possible across the area, especially late Tuesday night into early Wednesday morning. The system's cold front will move through Wednesday morning, causing winds to turn northwesterly in its wake. Gusts out of the northwest to around 20-30 mph will be possible during the afternoon hours Wednesday. A stray shower or thunderstorm can't be ruled out behind the cold front/beneath the upper trough axis Wednesday afternoon, but most locations should remain dry. High temperatures on Wednesday are expected to be in the upper 60s to near 70.

Strong cold advection will ensue in north to northwesterly flow Wednesday night. As a result, temperatures are forecast to drop into the upper 30s and lower 40s by daybreak. If some locations were to decouple, temperatures could drop even further, potentially leading to additional frost/freeze concerns.
However, the expectation at this time is for winds to remain up, thereby minimizing the threat for frost/freeze.

LONG TERM /THURSDAY THROUGH MONDAY/
Dry conditions return Thursday into Friday with high pressure building into the region. The next chance for precipitation approaches Friday night into Saturday as a warm front associated with a surface low over the Midwest moves in from the southwest. As it stands, along and west of the I-81 corridor has the best chance at seeing precipitation Saturday, but primarily upslope showers are expected with some spilling over the mountains. A lull in shower activity occurs Saturday night, followed by a similar upslope setup on Sunday, but with higher PoPs making it a bit further east.
Thunderstorms are possible both afternoons, with the greater potential for thunder on Sunday.

Thursday and Friday will be cooler, but gradually warming to near normal by Saturday. Sunday looks significantly warmer behind the warm front with forecast highs currently in the 70s to low 80s.

AVIATION /01Z TUESDAY THROUGH SATURDAY/
VFR conditions are expected through Tuesday. Winds will go calm tonight with high pressure overhead. Southerly winds are expected tomorrow, with gusts to around 15-20 knots during the afternoon. A few showers may be possible Tuesday night into Wednesday as a cold front crosses the area. Winds will turn northwesterly behind the front on Wednesday, with gusts to around 20-25 knots possible Wednesday afternoon.

VFR conditions are expected Thursday and Friday with high pressure in place yielding dry conditions. Could still see some clouds on Thursday with onshore flow and gusty winds 15-20 kt early Thursday morning diminish by the afternoon. Winds become gusty and more S/SE by Friday afternoon and clouds increase through the day with an approaching warm front.

MARINE
Winds really taper off tonight, going nearly calm, as high pressure moves overhead.

Winds will turn southerly tomorrow and gradually pick up through the day. Small Craft Advisories have been introduced to the forecast as a result.

A cold front will move over the waters on Wednesday, causing winds to turn northwesterly. SCAs will likely be needed Wednesday into Wednesday night.

SCAs may be needed early Thursday morning with departing low pressure and again Friday afternoon and evening with an approaching warm front.

FIRE WEATHER
Planning to introduce an increased fire danger threat for Tuesday given the combination of increasing southerly winds, warm temperatures, and RH values below 30 percent. This could even continue into Wednesday, depending on how much rain actually falls with the frontal passage on Tuesday night.

TIDES/COASTAL FLOODING
Anomalies are just above one foot currently and will hover there through Tuesday. While flooding appears unlikely during this time, sensitive locations could be close. Southerly winds will drive an increase in anomalies Tuesday night, and this appears the most likely time for some locations to experience minor flooding. NW winds Wednesday will push water levels back down.

LWX WATCHES/WARNINGS/ADVISORIES
DC...Frost Advisory from 2 AM to 8 AM EDT Tuesday for DCZ001.
MD...Frost Advisory from 2 AM to 8 AM EDT Tuesday for MDZ003>006- 008-011-013-014-016-503>508.
VA...Frost Advisory from 2 AM to 8 AM EDT Tuesday for VAZ028-030- 031-036>040-050-051-053>057-501-502-505>508-526-527.
Freeze Warning from 2 AM to 8 AM EDT Tuesday for VAZ025>027- 029.
WV...Frost Advisory from 2 AM to 8 AM EDT Tuesday for WVZ051>053.
Freeze Warning from 2 AM to 8 AM EDT Tuesday for WVZ050-055.
MARINE...Small Craft Advisory from 3 PM Tuesday to 6 AM EDT Wednesday for ANZ530>534-537>543.
Small Craft Advisory from noon to 10 PM EDT Tuesday for ANZ535- 536.

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Fort Carroll
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Mon -- 12:30 AM EDT     0.35 feet Low Tide
Mon -- 05:38 AM EDT     Moonset
Mon -- 06:18 AM EDT     Sunrise
Mon -- 06:40 AM EDT     1.55 feet High Tide
Mon -- 01:38 PM EDT     0.37 feet Low Tide
Mon -- 06:49 PM EDT     Moonrise
Mon -- 06:54 PM EDT     1.15 feet High Tide
Mon -- 07:51 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION

Fort Carroll, Maryland, Tide feet

Baltimore Harbor Approach
Click for Map
Mon -- 01:43 AM EDT     0.00 knots Slack
Mon -- 05:08 AM EDT     0.95 knots Max Flood
Mon -- 05:37 AM EDT     Moonset
Mon -- 06:18 AM EDT     Sunrise
Mon -- 08:27 AM EDT     -0.00 knots Slack
Mon -- 11:37 AM EDT     -0.87 knots Max Ebb
Mon -- 02:59 PM EDT     0.00 knots Slack
Mon -- 05:39 PM EDT     0.58 knots Max Flood
Mon -- 06:48 PM EDT     Moonrise
Mon -- 07:50 PM EDT     Sunset
Mon -- 08:24 PM EDT     -0.00 knots Slack
Mon -- 11:24 PM EDT     -0.68 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION

Baltimore Harbor Approach, Maryland Current, knots

Full Color Weather Map

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