US weather alerts: what watches and warnings mean and where to check locally

Understand the alert’s meaning

A watch means prepare. The risk of hazardous weather has increased, but whether, where, or when it will happen remains uncertain. Use that time to review your plans and stay informed.

A warning means take the threat seriously and follow its instructions. Hazardous conditions are happening, imminent, or highly likely. Read the timing carefully; some warnings concern conditions expected later. The word “warning” does not mean every hazard requires the same response. These distinctions come from the National Weather Service’s alert definitions.

An advisory still deserves attention. Conditions may fall below a warning’s threshold while creating problems for your plans. A flood advisory, for example, can describe flooding that causes significant inconvenience and can become dangerous without appropriate caution. NWS flood alert guidance

Start with the forecast for your location

Go to Weather.gov and enter your city and state or ZIP code. Confirm that the result matches the place you need, particularly when traveling or checking on someone elsewhere.

Open the alert text from the local forecast page. A colored national map is a useful starting point, but it may not show every concurrent hazard: NWS says only one event per forecast zone appears on its hazards map at a time. Clicking through lets you read the other alerts affecting that zone. NWS hazards-map explanation

Bookmark the local forecast page while conditions are calm. For a trip, save the destination’s page as well.

Read for place, time, hazard, and action

A useful reading routine is to look for four things:

Place: Which communities, counties, or mapped areas are included? Check your present location and any route you plan to take.

Time: When was the message issued? When does the hazard begin, and when does the alert expire? Notice the time zone.

Hazard: What conditions and impacts does the message describe?

Action: What does the issuing agency tell people in the affected area to do?

Phone alerts typically identify the alert type, time, issuing agency, and protective action. The NWS advises following that action and using trusted sources for additional details. NWS Wireless Emergency Alerts guidance

If an alert instructs you to shelter immediately, take that action first. For messages shared online, open the original source and check its date before forwarding them. A screenshot alone does not establish that an alert remains active.

Use more than one way to receive updates

Wireless Emergency Alerts, or WEA, can reach compatible phones without an app or signup. But NWS uses WEA for selected warnings; it does not send every watch, warning, or advisory through that channel. A quiet phone therefore does not establish that your area has no alerts. NWS WEA details

NOAA Weather Radio provides another route to official forecasts and warnings. It requires a receiver capable of receiving its broadcasts. For alerts at home, check for an alarm feature, battery backup, and local reception. Receivers with SAME technology let you select the geographic areas that trigger an alert. Follow the manufacturer’s programming instructions. NWS receiver guidance

Visit your city or county’s official emergency-management website to find its notification options. Keep local television or radio sources available, too. NWS recommends multiple warning sources, including a method that can wake you at night. NWS warning-reception guidance, page 48

Match your response to the hazard

An alert’s protective instructions matter more than a general rule such as “go downstairs.”

For a tornado warning, NWS directs people to an interior room on the lowest floor of a sturdy building, away from windows. Identify that shelter in advance, including when staying somewhere unfamiliar. NWS tornado-alert guidance

Flooding requires a different response. People in flood-prone areas under a flash flood warning should move immediately to higher ground. Do not walk or drive through floodwater, and obey evacuation instructions. NWS flood warnings, NWS flood safety

Before threatening weather arrives, discuss where household members will go and how they will communicate. Planning and practicing makes the instructions easier to carry out when an alert arrives. NWS preparation guidance