Data source: National Weather Service (NWS)

Winter Weather

Freeze Warning (WARNING) - expires October 19, 2026 at 5:00 AM EDT

Areas affected: Frederick; Carroll; Culpeper; Northern Fauquier; Southern Fauquier; Western Loudoun

Freeze Warning issued October 18 at 7:02PM EDT until October 19 at 9:00AM EDT by NWS Baltimore MD/Washington DC

- WHAT...Sub-freezing temperatures as low as 30\.

• WHERE...In Maryland, Carroll and Frederick Counties. In Virginia, Culpeper, Northern Fauquier, Southern Fauquier, and Western Loudoun Counties.

• WHEN...From 1 AM to 9 AM EDT Monday.

• IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.

• ADDITIONAL DETAILS...Expect the coldest temperatures in valleys and other low-lying areas.

What to do: Take steps now to protect tender plants from the cold.

Source: NWS Baltimore MD/Washington DC

Frost Advisory (ADVISORY) - expires October 19, 2026 at 5:00 AM EDT

Areas affected: Northern Baltimore; Northwest Montgomery; Central and Southeast Montgomery; Northwest Howard; Central and Southeast Howard; Northwest Harford; Greene; Madison; Rappahannock; Orange; Fairfax; Eastern Loudoun; Northwest Prince William; Central and Southeast Prince William/Manassas/Manassas Park

Frost Advisory issued October 18 at 7:02PM EDT until October 19 at 9:00AM EDT by NWS Baltimore MD/Washington DC

- WHAT...Temperatures as low as 33 will result in frost formation.

• WHERE...Portions of central and northern Maryland and central, northern, and northwest Virginia.

• WHEN...From 1 AM to 9 AM EDT Monday.

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

What to do: Take steps now to protect tender plants from the cold.

Source: NWS Baltimore MD/Washington DC

Flooding

Coastal Flood Watch (WATCH) - expires October 19, 2026 at 6:00 AM EDT

Areas affected: Inland Worcester

Coastal Flood Watch issued October 18 at 9:56PM EDT until October 21 at 9:00AM EDT by NWS Wakefield VA

- WHAT...One to two feet of inundation above ground level possible in low-lying areas near shorelines and tidal waterways.

• WHERE...Inland Worcester County.

• WHEN...From Tuesday afternoon through Wednesday morning.

• IMPACTS...Numerous roads may be closed. Low lying property including homes, businesses, and some critical infrastructure may be inundated. Some shoreline erosion may occur.

What to do: If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property.

Source: NWS Wakefield VA

Coastal Flood Watch (WATCH) - expires October 19, 2026 at 6:00 AM EDT

Areas affected: Maryland Beaches; Accomack; Northampton

Coastal Flood Watch issued October 18 at 9:56PM EDT until October 21 at 9:00AM EDT by NWS Wakefield VA

- WHAT...For the High Surf Advisory, large breaking waves of 8 to 12 feet in the surf zone. For the Coastal Flood Watch, up to one foot of inundation above ground level possible in low- lying areas near shorelines and tidal waterways.

• WHERE...In Maryland, Maryland Beaches County. In Virginia, Accomack and Northampton Counties.

• WHEN...For the High Surf Advisory, until 7 PM EDT Wednesday. For the Coastal Flood Watch, from Tuesday afternoon through Wednesday morning.

• IMPACTS...Numerous roads may be closed. Low lying property including homes, businesses, and some critical infrastructure may be inundated. Some shoreline erosion may occur. Dangerous swimming and surfing conditions and localized beach erosion.

What to do: If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property.

Inexperienced swimmers should remain out of the water due to dangerous surf conditions.

Source: NWS Wakefield VA

Coastal Flood Advisory (ADVISORY) - expires October 19, 2026 at 3:00 AM EDT

Areas affected: Anne Arundel

Coastal Flood Advisory issued October 18 at 9:12PM EDT until October 19 at 3:00AM EDT by NWS Baltimore MD/Washington DC

- WHAT...Up to one half foot of inundation above ground level in low lying areas due to tidal flooding.

• WHERE...Shoreline in Anne Arundel County.

• WHEN...Until 3 AM EDT Monday, especially around the time of high tide.

• IMPACTS...At 2.6 feet, water may begin to pond in the parking lot at Annapolis City Dock, and surround the Alex Haley Memorial.

• ADDITIONAL DETAILS...Tides one to one and a half feet above normal. High tide at Annapolis U.S. Naval Academy is at 12:20 AM.

What to do: If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property.

Source: NWS Baltimore MD/Washington DC

Source

Alert data provided by the National Weather Service (NWS). This page shows active alerts only and is refreshed daily. For real-time updates, visit weather.gov.