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Armstrong County weather alerts
No active National Weather Service alerts for Armstrong County, Pennsylvania right now. The most recent was a Freeze Warning that ended Oct 18, 9:00 AM.
13 in the last 30 days 45 in 12 months (since Aug 30) most common: Flash Flood Warning Get alerts on your phone →
Active alerts for Armstrong County
Refreshed every few minutes; times in EDT.
All clear in Armstrong County
No warnings, watches or advisories are in effect. See what is active across the country, or check a neighbouring county below.
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Where
Armstrong County on the map
Alert polygons are NWS's own. Forecast Bar's radar shows the same warnings over live precipitation, with future radar and lightning. See the radar.
Last 30 days
Recent alerts for Armstrong County
| Alert | Issued | Ended | Issued by |
|---|---|---|---|
| Freeze Warning | Oct 17, 8:11 PM | Oct 18, 9:00 AM | Pittsburgh PA |
| Freeze Warning | Oct 17, 12:43 PM | Oct 18, 9:00 AM | Pittsburgh PA |
| Freeze Warning | Oct 17, 12:44 AM | Oct 18, 9:00 AM | Pittsburgh PA |
| Freeze Watch | Oct 16, 6:07 PM | Oct 18, 9:00 AM | Pittsburgh PA |
| Severe Thunderstorm Warning | Oct 16, 12:35 PM | Oct 16, 1:00 PM | Pittsburgh PA |
| Severe Thunderstorm Warning | Oct 16, 12:32 PM | Oct 16, 1:00 PM | Pittsburgh PA |
| Severe Thunderstorm Warning | Oct 16, 12:24 PM | Oct 16, 1:00 PM | Pittsburgh PA |
| Freeze Watch | Oct 16, 12:17 PM | Oct 18, 9:00 AM | Pittsburgh PA |
| Severe Thunderstorm Warning | Oct 16, 12:12 PM | Oct 16, 1:00 PM | Pittsburgh PA |
| Flood Warning | Oct 11, 4:21 PM | Oct 11, 4:30 PM | Pittsburgh PA |
| Flood Warning | Oct 11, 11:16 AM | Oct 11, 4:30 PM | Pittsburgh PA |
| Special Weather Statement | Sep 30, 8:50 AM | Sep 30, 10:00 AM | Pittsburgh PA |
| Special Weather Statement | Sep 30, 4:57 AM | Sep 30, 9:00 AM | Pittsburgh PA |
Pattern
What Armstrong County gets alerted for
Every alert that named Armstrong County in the last 12 months, by type. Records begin August 30, 2026, so this fills in over the year.
Plain English
What these alerts mean
A warning means the hazard is happening or about to; a watch means conditions favour it; an advisory is a lesser hazard still worth planning around.
Sub-freezing temperatures are imminent. Protect tender plants and outdoor plumbing.
Sub-freezing temperatures are possible. Be ready to protect plants and pipes.
A storm with hail of 1 inch or larger, winds of 58 mph or more, or both, is occurring or imminent. Move indoors and away from windows.
Flooding of rivers, streams or low-lying areas is occurring or expected. Avoid flooded roads and monitor river levels.
A heads-up about conditions that do not meet warning or advisory criteria but still deserve attention, such as a strong storm, patchy fog or a brief burst of snow.
Flash flooding is occurring or imminent. Move to higher ground; never drive into water covering a road.
Conditions are favourable for flooding. Have a plan in case a warning is issued.
Conditions are favourable for severe thunderstorms with large hail or damaging wind. Keep an eye on the sky and on warnings.
Nearby
Alerts near Armstrong County
Neighbouring counties in Pennsylvania
Questions
About Armstrong County alerts
How do I get Armstrong County weather alerts on my iPhone?
Install Forecast Bar, add Armstrong County as a location, and turn on severe weather alerts. Every NWS warning, watch and advisory for Armstrong County then arrives as a push notification at the moment of issue, with Critical Alerts available for the most dangerous warnings. Forecast Bar also runs on iPad, Apple Watch, Mac and Apple TV.
Where do these alerts come from?
From the National Weather Service alert feed (api.weather.gov). NWS issues alerts by county and by forecast zone; this page lists every product that names Armstrong County. Forecast Bar checks the feed continuously and this page refreshes within a few minutes of a change.
What is the difference between a watch, a warning and an advisory?
A warning means the hazard is occurring, imminent or very likely: act now. A watch means conditions are favourable for it to develop: prepare and stay informed. An advisory covers a hazard that is less serious than a warning but can still cause real inconvenience or danger if you are not ready for it.
Can I get this data as JSON?
Yes. /weather-alerts/pa/armstrong-county.json returns the active alerts, the last 30 days and the 12-month counts for Armstrong County, refreshed every minute. Please cache responses and credit National Weather Service as the source.
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