Alerts
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| Freeze Warning issued April 20 at 5:36PM EDT until April 21 at 10:00AM EDT by NWS Baltimore MD/Washington DC | ||
| NWS Baltimore MD/Washington DC | ||
| Category | Certainty | Severity |
| Met | Likely | Moderate |
| Status | Urgency | Category |
| Actual | Expected | Met |
| Effective | Ends | Expires |
| 04/20/2026 05:36 PM | 04/21/2026 10:00 AM | 04/21/2026 01:45 AM |
* WHAT...Sub-freezing temperatures as low as 29 expected, especially
in outlying areas away from larger bodies of water.
* WHERE...Portions of DC, central, northern, and southern Maryland,
and central and northern Virginia.
* WHEN...From 2 AM to 10 AM EDT Tuesday.
* IMPACTS...Frost and freeze conditions could kill crops, other
sensitive vegetation and possibly damage unprotected outdoor
plumbing.
|
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Hourly Forecast
Mon, 11:00 PM
ClearWinds: 12 mph N
Tue, 12:00 AM
ClearWinds: 12 mph N
Tue, 01:00 AM
ClearWinds: 10 mph N
Tue, 02:00 AM
ClearWinds: 10 mph N
Tue, 03:00 AM
ClearWinds: 10 mph NE
Tue, 04:00 AM
ClearWinds: 9 mph NE
Tue, 05:00 AM
ClearWinds: 9 mph NE
Tue, 06:00 AM
SunnyWinds: 8 mph NE
Tue, 07:00 AM
SunnyWinds: 7 mph NE
Tue, 08:00 AM
SunnyWinds: 7 mph NE
Tue, 09:00 AM
SunnyWinds: 6 mph NE
Tue, 10:00 AM
SunnyWinds: 5 mph N
Tue, 11:00 AM
SunnyWinds: 3 mph N
Tue, 12:00 PM
SunnyWinds: 5 mph SW
Tue, 01:00 PM
SunnyWinds: 6 mph S
Tue, 02:00 PM
SunnyWinds: 6 mph S
Tue, 03:00 PM
SunnyWinds: 6 mph S
Tue, 04:00 PM
SunnyWinds: 8 mph S
Tue, 05:00 PM
SunnyWinds: 9 mph SE
Tue, 06:00 PM
Mostly ClearWinds: 10 mph SE
Tue, 07:00 PM
Mostly ClearWinds: 12 mph SE
Tue, 08:00 PM
Mostly ClearWinds: 12 mph SE
Tue, 09:00 PM
Mostly ClearWinds: 13 mph S
Tue, 10:00 PM
Partly CloudyWinds: 13 mph S
Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY.
Tidal Potomac River and Maryland portion of Chesapeake Bay. Forecasts of wave heights do not include effects of wind direction relative to tidal currents. Expect higher waves when winds are blowing against the tidal flow. Waves flat where waters are iced over. High pressure will build in through Tuesday. A weak cold front looks to drop in from the north Wednesday, then cross the Mid-Atlantic by Thursday. Small Craft Advisories may be needed late Tuesday into Wednesday in south to southwest flow. Additional Small Craft Advisories are possible later this week and weekend as multiple fronts and waves of low pressure traverse the region.