Marine Weather Net

Chesapeake Bay north of Pooles Island MD Marine Forecast


REST OF TONIGHT

NW
WINDS
5 KNOTS

THU

W
WINDS
5 KNOTS

THU NIGHT

SW
WINDS
5 KNOTS

FRI

W
WINDS
5 - 10
KNOTS

The Marine Weather Forecast In Detail:
ANZ530 Forecast Issued: 1032 PM EDT Wed Oct 05 2022

Rest Of Tonight...Nw Winds 5 Kt. Waves Less Than 1 Ft.
Thu...W Winds Around 5 Kt. Waves Flat.
Thu Night...Sw Winds 5 Kt. Waves Less Than 1 Ft.
Fri...W Winds 5 To 10 Kt. Waves 1 Ft Or Less.
Fri Night...Nw Winds 5 To 10 Kt. Waves 1 Ft.
Sat...Nw Winds 5 To 10 Kt. Waves 1 Ft.
Sat Night...Nw Winds 5 Kt. Waves Less Than 1 Ft.
Sun...W Winds 5 Kt. Waves Less Than 1 Ft.
Mon...Sw Winds Around 5 Kt. Waves 1 Ft Or Less.
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Area Forecast Discussion
National Weather Service Baltimore MD/Washington DC
856pm EDT Wednesday Oct 5 2022

Synopsis
An upper low and associated coastal low will pull away to the east through tonight. High pressure will build back in tomorrow. A potent cold front will move through the area on Friday, with high pressure gradually building back overhead in its wake this weekend.

Near Term - Until 6am Thursday Morning
Upper-level ridging will build overhead tonight behind a departing upper-level low. Weak high pressure will build overhead as well, and this will allow for clouds to continue clearing in eastern areas. Dry conditions will persist with lows in the 40s for most places to the lower 50s in downtown Washington and Baltimore. Some colder valleys in the Potomac Highlands may dip into the mid and upper 30s.

Patchy fog is possible overnight, especially in the river valleys and sheltered valleys.

Short Term - 6am Thursday Morning Through Friday Night
A strong shortwave trough will rotate through the Great Lakes Thursday through Friday. It will kick a lead shortwave across the area on Thursday potentially increasing mid and high level clouds at times during the afternoon and evening. However, with more overall sun that preceding days and some warm advection ahead of the trough, high temperatures will rebound closer to normal in the lower to mid 70s.

Dry and seasonable temperatures will continue into Friday morning. The stronger trough axis will be passing to the north during the day Friday, driving a surface low along the St. Lawrence Valley and a trailing cold front across the local area. With limited forcing and moisture, rain shower chances will be mainly limited to areas near and west of the Allgheny Front. Prior to the cold frontal passage there will actually be a fair amount of sunshine, with temperatures climbing into the 70s for most, and perhaps to near 80 in the Fredericksburg area.

Strong cold advection will ensue in the wake of the cold front Friday night. Temperatures will crash into the 40s for most, with 30s along and west of I-81. With gusty winds occurring through the night, frost formation isn't anticipated, but the absolute highest elevations along the Allegheny Front may see a freeze as 850mb temperatures drop below 0C.

Long Term - Saturday Through Wednesday
The long term period begins with general troughing over the eastern portions of the United States. An embedded shortwave trough will move in from the Great Lakes over our area Saturday afternoon. With a dry airmass overhead (PW values (Precipitable Water values) less than an inch) no precipitation is expected. This will bring below average temperatures and westerly flow. Northerly winds on Saturday will shift to west-southwesterly Sunday afternoon. Saturday high temperatures will be in the 50s-60s for most with higher elevations in the 40s. Overnight lows will be in the 30s to 40s depending on elevation. At least pockets of frost will be possible in rural areas west of I-95, with colder temperatures and greater chances of frost and/or freeze west of the Blue Ridge.

For Sunday through Tuesday, a broad area of surface high pressure settles over the Mid-Atlantic. Throughout the remainder of the long term period, the surface high will gradually pivot northeast while generally remaining overhead. Sunday will be the coolest day with high temperatures in the low to mid 60s(40s-50s at higher elevations) and overnight lows in the 30s-40s. A gradual warming trend will take place Monday and Tuesday with high temperatures getting into the 70s on Tuesday for those near the Bay and metro areas. Dry conditions will persist throughout the long term period.

Marine
Winds will continue to diminish overnight, and remain below SCA criteria. Sub-SCA (Small Craft Advisory) westerly winds are expected Thursday and Thursday night as high pressure crosses the area. Marginal SCA (Small Craft Advisory) conditions may occur Friday morning, but the stronger push of northwest winds will occur during the afternoon and evening as a (dry) cold front crosses the area.

Increased wind speeds behind the front may continue to result in small craft advisory criteria being met for portions of Saturday. Winds will decrease Saturday evening into Sunday with sub SCA (Small Craft Advisory) criteria expected.

Tides / Coastal Flooding
Anomalies are around 1 foot above normal in the southern portion of the Bay this evening. These anomalies will likely push northward later tonight through Thursday night as winds diminish. Tidal anomalies are likely to increase causing water levels to reach caution stages for sensitive areas around high tide. It is possible that minor flood thresholds are met, especially Thursday night where a little southerly flow may take place. However, confidence is too low at this time for any headlines.

NOAA Baltimore MD/Washington DC Office: Watches - Warnings - Advisories
DC...None. MD...None. VA...None. WV...None.

Marine
None.