Montgomery County, PA
Alerts
Alerts are listed in order of start time and level of severity. Click on the alert title to read details for each alert.
In effect from Tuesday 07/21 4:46 PM EDT – Wednesday 07/22 2:00 AM EDT
Issued by NWS Mount Holly NJ
What
Flash flooding caused by excessive rainfall continues to be possible.
Where
Portions of northern Delaware, including the following area, New Castle, New Jersey, including the following areas, Camden, Eastern Monmouth, Gloucester, Hunterdon, Mercer, Middlesex, Morris, Northwestern Burlington, Somerset and Western Monmouth, and southeast Pennsylvania, including the following areas, Delaware, Eastern Chester, Eastern Montgomery, Lower Bucks, Philadelphia, Upper Bucks, Western Chester and Western Montgomery.
When
Until 2 AM EDT Wednesday.
Impacts
Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas.
Additional Details
- Showers and thunderstorms will continue into tonight with the most widespread activity occurring through this evening. Some heavy showers and thunderstorms will produce torrential rainfall, with 2 to 3 inches of rain per hour possible. The excessive rainfall within a short period of time, especially in urban areas, could lead to flash flooding. - http://www.weather.gov/safety/flood
What to Do
You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.
Areas Impacted
- New Castle
- Morris
- Hunterdon
- Somerset
- Middlesex
- Western Monmouth
- Eastern Monmouth
- Mercer
- Gloucester
- Camden
- Northwestern Burlington
- Delaware
- Philadelphia
- Western Chester
- Eastern Chester
- Western Montgomery
- Eastern Montgomery
- Upper Bucks
- Lower Bucks
Tips to Stay Safe
A Flood Watch means the area may experience a dangerous flooding event, and being prepared may save lives and property.
- Be aware of low-lying areas along your travel routes that are most likely to flood.
- Check your home’s emergency supplies, and make sure all members of the household know your emergency plan.
- Stay tuned for local weather updates on the situation as it develops.
If a Flood Warning is issued, it means that dangerous flooding is expected or already happening.
- Never walk, swim, or drive through flood waters or flooded roads.
- Stay away from areas where water levels can rise rapidly, like storm drains, culverts, creeks and streams.
If your home is likely to flood, or if authorities tell you to evacuate, do so immediately and move to higher ground.
Briefings
From the Forecaster
Today's Severe Thunderstorm Risk
Created by the NWS Mount Holly WFO
Showers and thunderstorms will increase through this evening. Some thunderstorms will be capable of producing damaging winds, a few tornadoes and large hail.
Seven-day Weather Risk Overview
The graphic shows the daily risk summary for 7 days. Daily risk is based on highest risk factor for that day.
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