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Middlesex County weather alerts
No active National Weather Service alerts for Middlesex County, New Jersey right now. The most recent was a Frost Advisory that ended Oct 19, 9:00 AM.
35 in the last 30 days 43 in 12 months (since Aug 30) most common: Coastal Flood Advisory Get alerts on your phone →
Active alerts for Middlesex County
Refreshed every few minutes; times in EDT.
All clear in Middlesex County
No warnings, watches or advisories are in effect. See what is active across the country, or check a neighbouring county below.
Get Middlesex County alerts on your phone before you think to look them up
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Where
Middlesex 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 Middlesex County
| Alert | Issued | Ended | Issued by |
|---|---|---|---|
| Frost Advisory | Oct 19, 2:14 AM | Oct 19, 9:00 AM | Mount Holly NJ |
| Frost Advisory | Oct 18, 1:58 PM | Oct 19, 9:00 AM | Mount Holly NJ |
| Severe Thunderstorm Watch | Oct 16, 3:52 PM | Oct 16, 10:00 PM | Mount Holly NJ |
| Coastal Flood Advisory | Sep 28, 1:34 PM | Sep 28, 2:00 PM | Mount Holly NJ |
| Coastal Flood Advisory | Sep 28, 3:37 AM | Sep 28, 2:00 PM | Mount Holly NJ |
| Coastal Flood Advisory | Sep 27, 6:00 PM | Sep 28, 2:00 PM | Mount Holly NJ |
| Coastal Flood Advisory | Sep 27, 12:48 PM | Sep 28, 2:00 PM | Mount Holly NJ |
| Wind Advisory | Sep 27, 11:43 AM | Sep 27, 12:00 PM | Mount Holly NJ |
| Coastal Flood Warning | Sep 27, 4:51 AM | Sep 27, 2:00 PM | Mount Holly NJ |
| Wind Advisory | Sep 27, 4:25 AM | Sep 27, 12:00 PM | Mount Holly NJ |
| Coastal Flood Warning | Sep 27, 3:01 AM | Sep 27, 2:00 PM | Mount Holly NJ |
| Wind Advisory | Sep 26, 6:03 PM | Sep 27, 12:00 PM | Mount Holly NJ |
| Wind Advisory | Sep 26, 5:51 PM | Sep 27, 12:00 PM | Mount Holly NJ |
| Coastal Flood Warning | Sep 26, 4:34 PM | Sep 27, 2:00 PM | Mount Holly NJ |
| Wind Advisory | Sep 26, 1:26 PM | Sep 27, 12:00 PM | Mount Holly NJ |
| Wind Advisory | Sep 26, 1:17 PM | Sep 27, 12:00 PM | Mount Holly NJ |
| Coastal Flood Warning | Sep 26, 11:51 AM | Sep 27, 2:00 PM | Mount Holly NJ |
| Coastal Flood Warning | Sep 26, 11:40 AM | Sep 27, 2:00 PM | Mount Holly NJ |
| Coastal Flood Warning | Sep 26, 4:20 AM | Sep 27, 2:00 PM | Mount Holly NJ |
| Wind Advisory | Sep 26, 4:08 AM | Sep 27, 6:00 AM | Mount Holly NJ |
| Coastal Flood Warning | Sep 25, 2:34 PM | Sep 27, 2:00 PM | Mount Holly NJ |
| Wind Advisory | Sep 25, 2:22 PM | Sep 27, 6:00 AM | Mount Holly NJ |
| Coastal Flood Warning | Sep 25, 7:33 AM | Sep 27, 3:00 PM | Mount Holly NJ |
| Coastal Flood Warning | Sep 25, 6:18 AM | Sep 27, 3:00 PM | Mount Holly NJ |
| Wind Advisory | Sep 25, 4:43 AM | Sep 27, 6:00 AM | Mount Holly NJ |
| Wind Advisory | Sep 25, 3:15 AM | Sep 27, 6:00 AM | Mount Holly NJ |
| Coastal Flood Warning | Sep 24, 10:50 PM | Sep 26, 2:00 PM | Mount Holly NJ |
| Coastal Flood Advisory | Sep 24, 12:57 PM | Sep 26, 2:00 AM | Mount Holly NJ |
| Coastal Flood Advisory | Sep 24, 5:36 AM | Sep 26, 2:00 AM | Mount Holly NJ |
| Coastal Flood Advisory | Sep 23, 11:31 PM | Sep 26, 2:00 AM | Mount Holly NJ |
| Coastal Flood Advisory | Sep 23, 5:40 PM | Sep 26, 2:00 AM | Mount Holly NJ |
| Coastal Flood Advisory | Sep 23, 3:00 PM | Sep 26, 2:00 AM | Mount Holly NJ |
| Coastal Flood Advisory | Sep 23, 4:28 AM | Sep 26, 2:00 AM | Mount Holly NJ |
| Coastal Flood Advisory | Sep 22, 9:53 PM | Sep 25, 1:00 AM | Mount Holly NJ |
| Coastal Flood Advisory | Sep 22, 4:14 PM | Sep 25, 1:00 AM | Mount Holly NJ |
Pattern
What Middlesex County gets alerted for
Every alert that named Middlesex 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.
Frost is expected on the ground. Cover sensitive plants overnight.
Conditions are favourable for severe thunderstorms with large hail or damaging wind. Keep an eye on the sky and on warnings.
Minor coastal flooding is expected, usually around high tide. Expect water on low-lying roads near the shore.
Sustained winds of 30 mph or more, or gusts to 45 mph, are expected. Use caution driving high-profile vehicles.
Significant coastal flooding is occurring or imminent, typically at high tide. Move away from low-lying shoreline areas.
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.
Nearby
Alerts near Middlesex County
Cities in Middlesex County
Neighbouring counties in New Jersey
Questions
About Middlesex County alerts
How do I get Middlesex County weather alerts on my iPhone?
Install Forecast Bar, add Middlesex County as a location, and turn on severe weather alerts. Every NWS warning, watch and advisory for Middlesex 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 Middlesex 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/nj/middlesex-county.json returns the active alerts, the last 30 days and the 12-month counts for Middlesex County, refreshed every minute. Please cache responses and credit National Weather Service as the source.
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