Delaware County, Pennsylvania weather alerts

No watches, warnings or advisories are in force for Delaware County.

Checked Sun, Sep 20, 2026, 11:15 AM EDT. Times are Eastern Daylight Time.

Delaware County forecast Live radar here

Warnings on the map

Every watch, warning and advisory the National Weather Service has in force over Delaware County, Pennsylvania. Open it for the live map, where it pans and zooms.

Open the live map with warnings and watches

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

Alerts in force

Nothing is in force for Delaware County right now. Its warnings come from the National Weather Service and appear here within a minute of being issued; every one of the past year is below.

The past year in Delaware County

In the past year the National Weather Service issued 182 alerts for Delaware County, including 42 severe thunderstorm warnings, 35 flash flood warnings, 8 flood warnings and 4 tornado warnings.

Product	Issued	Most recent
Severe Thunderstorm Warning	42	Sep 1, 2026
Flash Flood Warning	35	Sep 13, 2026
Flood Warning	8	Sep 3, 2026
Tornado Warning	4	Aug 20, 2026
Winter Storm Warning	4	Feb 22, 2026
Freeze Warning	3	Apr 21, 2026
Snow Squall Warning	3	Feb 7, 2026
Extreme Heat Warning	2	Jul 15, 2026
Blizzard Warning	1	Feb 22, 2026
Extreme Cold Warning	1	Feb 7, 2026
High Wind Warning	1	Dec 19, 2025
Severe Thunderstorm Watch	16	Sep 1, 2026
Flood Watch	10	Sep 13, 2026
Tornado Watch	5	Aug 20, 2026
Freeze Watch	3	Apr 21, 2026
Extreme Heat Watch	2	Jul 15, 2026
Winter Storm Watch	2	Feb 22, 2026
Extreme Cold Watch	1	Feb 7, 2026
Dense Fog Advisory	9	Mar 21, 2026
Heat Advisory	7	Sep 3, 2026
Wind Advisory	7	Mar 16, 2026
Coastal Flood Advisory	5	Apr 30, 2026
Frost Advisory	4	Nov 7, 2025
Winter Weather Advisory	4	Mar 3, 2026
Cold Weather Advisory	3	Feb 8, 2026

Warnings issued

And 44 earlier warnings.

Every alert, most recent first

The 40 most recent of 182.

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 date links to the event at the IEM.

Nearby

The counties around Delaware 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.

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.