Maryland alerts

Saint Mary's County, Maryland weather alerts

1 National Weather Service alert is in force for Saint Mary's County: a coastal flood advisory.

Checked Sat, Sep 26, 2026, 2:50 PM EDT. Times are Eastern Daylight Time.

Saint Mary's County forecastLive radar here

Warnings on the map

Every watch, warning and advisory the National Weather Service has in force over Saint Mary's County, Maryland. Open it for the live map, where it pans and zooms.

Every watch, warning and advisory the National Weather Service has in force over Saint Mary's County, Maryland Open the live map with warnings and watches

Map layer from NOAA National Weather Service. Boundaries from the Iowa Environmental Mesonet.

Alerts in force1

Every product in force for Saint Mary's County, worst first, with its full text.

Coastal Flood Advisory

Minor

Coastal Flood Advisory issued September 26 at 8:36AM EDT until September 27 at 5:00PM EDT by NWS Baltimore MD/Washington DC

Issued Until 26 hr 9 min left

Areas St. Marys, MD

Full text

* WHAT...Two to two and a half feet of inundation above ground level in low lying areas due to tidal flooding. * WHERE...Shoreline in St. Marys County. * WHEN...Until 5 PM EDT Sunday, especially around the time of high tide. * IMPACTS...At 3.5 feet, water covers roads on Saint George Island, is in yards, and is approaching structures. To the east, inundation is occurring at multiple marinas off St. Mary's River, Smith Creek, and Jutland Creek. * ADDITIONAL DETAILS...Tides two to two and a half feet above normal. The next high tide at Piney Point is at 2:43 PM and 3:07 AM. The next high tide at Coltons Point is at 3:19 PM and 3:43 AM. The next high tide at Point Lookout is at 1:53 PM and 1:55 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.

NWS Baltimore MD/Washington DCShare this alert

The past year in Saint Mary's County

In the past year the National Weather Service issued 116 alerts for Saint Mary's County, including 31 severe thunderstorm warnings, 5 coastal flood warnings, 3 extreme heat warnings and 3 tornado warnings.

ProductIssuedMost recent
Severe Thunderstorm Warning31Aug 22, 2026
Coastal Flood Warning5Sep 23, 2026
Extreme Heat Warning3Jul 4, 2026
Tornado Warning3Aug 20, 2026
Freeze Warning2Apr 21, 2026
Winter Storm Warning2Feb 22, 2026
Flash Flood Warning1Jul 6, 2026
High Wind Warning1Feb 7, 2026
Red Flag Warning1Nov 16, 2025
Severe Thunderstorm Watch18Sep 4, 2026
Coastal Flood Watch3Sep 24, 2026
Tornado Watch3Aug 20, 2026
Extreme Heat Watch2Jul 4, 2026
Freeze Watch2Apr 21, 2026
Winter Storm Watch2Feb 22, 2026
Fire Weather Watch1Nov 16, 2025
Flood Watch1Jul 6, 2026
Coastal Flood Advisory8Sep 22, 2026
Cold Weather Advisory8Feb 7, 2026
Heat Advisory8Sep 3, 2026
Wind Advisory4Mar 16, 2026
Frost Advisory3Apr 9, 2026
Winter Weather Advisory2Dec 5, 2025
Dense Fog Advisory1Mar 5, 2026
Freezing Fog Advisory1Dec 6, 2025

Warnings issued

  1. Coastal Flood Warning
  2. Severe Thunderstorm Warning
  3. Tornado Warning
  4. Tornado Warning
  5. Severe Thunderstorm Warning
  6. Severe Thunderstorm Warning
  7. Severe Thunderstorm Warning
  8. Severe Thunderstorm Warning
  9. Severe Thunderstorm Warning
  10. Severe Thunderstorm Warning
  11. Severe Thunderstorm Warning
  12. Severe Thunderstorm Warning
  13. Severe Thunderstorm Warning
  14. Severe Thunderstorm Warning
  15. Severe Thunderstorm Warning
  16. Severe Thunderstorm Warning
  17. Tornado Warning
  18. Severe Thunderstorm Warning
  19. Flash Flood Warning
  20. Severe Thunderstorm Warning
  21. Severe Thunderstorm Warning
  22. Severe Thunderstorm Warning
  23. Extreme Heat Warning
  24. Extreme Heat Warning
  25. Extreme Heat Warning
  26. Severe Thunderstorm Warning
  27. Severe Thunderstorm Warning
  28. Severe Thunderstorm Warning
  29. Severe Thunderstorm Warning
  30. Severe Thunderstorm Warning
  31. Severe Thunderstorm Warning
  32. Severe Thunderstorm Warning
  33. Severe Thunderstorm Warning
  34. Severe Thunderstorm Warning
  35. Severe Thunderstorm Warning
  36. Severe Thunderstorm Warning
  37. Freeze Warning
  38. Severe Thunderstorm Warning
  39. Severe Thunderstorm Warning
  40. Severe Thunderstorm Warning
  41. Winter Storm Warning
  42. High Wind Warning
  43. Winter Storm Warning
  44. Red Flag Warning
  45. Freeze Warning
  46. Coastal Flood Warning
  47. Coastal Flood Warning
  48. Coastal Flood Warning
  49. Coastal Flood Warning
Every alert, most recent first
  1. Coastal Flood Watch
  2. Coastal Flood Warning
  3. Coastal Flood Advisory
  4. Severe Thunderstorm Watch
  5. Severe Thunderstorm Watch
  6. Heat Advisory
  7. Severe Thunderstorm Watch
  8. Severe Thunderstorm Watch
  9. Severe Thunderstorm Warning
  10. Tornado Warning
  11. Tornado Warning
  12. Tornado Watch
  13. Severe Thunderstorm Watch
  14. Severe Thunderstorm Warning
  15. Severe Thunderstorm Warning
  16. Severe Thunderstorm Warning
  17. Severe Thunderstorm Warning
  18. Severe Thunderstorm Warning
  19. Severe Thunderstorm Warning
  20. Severe Thunderstorm Watch
  21. Severe Thunderstorm Warning
  22. Tornado Watch
  23. Severe Thunderstorm Watch
  24. Severe Thunderstorm Warning
  25. Severe Thunderstorm Warning
  26. Severe Thunderstorm Warning
  27. Severe Thunderstorm Warning
  28. Severe Thunderstorm Watch
  29. Severe Thunderstorm Warning
  30. Severe Thunderstorm Watch
  31. Heat Advisory
  32. Heat Advisory
  33. Heat Advisory
  34. Tornado Warning
  35. Severe Thunderstorm Warning
  36. Severe Thunderstorm Watch
  37. Flood Watch
  38. Flash Flood Warning
  39. Heat Advisory
  40. Severe Thunderstorm Warning

The 40 most recent of 116.

From the Iowa Environmental Mesonet’s archive of NWS watches, warnings and advisories (VTEC), by the county’s own code and the forecast zones inside it. Each links to the alert's own page, with its text, map, radar and sounding.

Every alert in Saint Mary's County since 1986

Nearby

The counties around Saint Mary's County, with what is in force in each.

What this means

Warning
The hazard is happening or about to. Act now: a tornado warning means take shelter, a flash flood warning means move to higher ground.
Watch
Conditions favor the hazard. Nothing is happening yet; have a plan and be ready to act if a warning follows.
Advisory
A hazard that is less serious than a warning but can still cause trouble, such as dense fog, heat or light ice.
Statement
Information about weather that does not yet meet a warning: a strong storm, a hydrologic update, or a special weather statement.

Severity (extreme, severe, moderate, minor) is the rating the issuing office gives each product. More on the difference: tornado watch vs. tornado warning. Alerts come from the National Weather Service; follow its instructions and your local officials.

Follow these alerts

Alerts for Saint Mary's County in your reader or calendar.

The alerts on this page as a feed, updated every minute, for a feed reader or an app that reads Atom or RSS, and as a calendar where each alert runs from when it takes effect to when it ends. A feed or a calendar is not a warning siren: for warnings, keep a weather radio or your phone's emergency alerts on.

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Sources

Alerts from the National Weather Service's public feed, read afresh every minute, and matched to counties and zones by their UGC codes. Warnings from outside the United States come from each country's own meteorological service. Follow the issuing office's instructions and your local officials.