Legends Index

Air Quality Index

 

A number used by government agencies to communicate to the public how polluted the air currently is or how polluted it is forecast to become. As the AQI increases, an increasingly large percentage of the population is likely to experience increasingly severe adverse health effects.

 

Android 

Available worldwide, Refreshes every 15 minutes

 

IOS 

Available worldwide // Refreshes every 15 minutes

Convectional Daily Outlook

 

Convective Daily Outlook consists of a graphic depiction of severe thunderstorm threats across the continental United States. The graphics display up to six different color categories to reflect the six likelihood of occurrences and/or increased severity of a severe weather event.

 

Android 

Available in the USA only // Refreshes as needed

 

IOS 

Available in the USA only // Refreshes as needed

Droughts Weekly Outlook

 

Droughts Weekly Outlook shows predicted trends for areas currently in drought, as well as areas where new droughts may develop.

 

Android 

Available in the USA only // Refreshes weekly

 

IOS 

Available in the USA only // Refreshes weekly

Fires Daily Outlook

 

The daily probability for occurrence of a new large fire and/or the daily potential for significant new growth on existing fires

 

Android 

Available in the USA only // Refreshes daily

 

IOS 

Available in the USA only // Refreshes daily

Heat Index Layer

 

Heat Index, also known as the apparent temperature, is what the temperature feels like to the human body when relative humidity is combined with the air temperature. Heat Index is displayed as degrees Fahrenheit or Celsius. 

 

Android 

Available worldwide // Refreshes every 30 minutes

 

IOS 

Available worldwide // Refreshes every 30 minutes

Humidity Global Layer

 

Humidity is displayed as a % of humidity (water vapor) present in the atmosphere. 

 

Android 

Available worldwide // Refreshes every 60 minutes

 

IOS 

Available worldwide // Refreshes every 60 minutes

Infrared Satellite Layer

 

IR Satellite Imagery provides cloud density data. In simple terms, we can see how high cloud formations rise based on how cold IR imagery records them. The colder the cloud formation is, the higher it extends because temperature falls as we go higher. The colder the cloud the more likely it is to produce rain. The temperature structure of clouds also tells meteorologists how hard it may be raining and whether the storm may be producing severe weather.  

 

Android 

Available worldwide // Refreshes every 15 minutes in the USA, 2 hours for global

 

IOS 

Available worldwide // Refreshes every 15 minutes in the USA, 2 hours for global

Lightning Icons

 

Cloud-to-ground lightning strikes in the last 5-15 minutes.

 

Android 

Available worldwide // Refreshes every 5 minutes

 

IOS 

Available worldwide // Refreshes every 5 minutes

Precipitation 6-10 Day Outlook

 

Precipitation outlook provides the probability (percent chance) that precipitation will occur in an area. The graphics represent the likelihood for the occurrence of a precipitation event from the current conditions. Areas less than "equal" have a reduced likelihood of a precipitation event taking place in the next 6 to 10 days.  

 

Android 

Available worldwide // Refreshes daily

 

IOS 

Available worldwide // Refreshes daily

Precipitation Radar 

Rain

 

Ice

Snow

Precipitation Radar shows the location of precipitation, its type (rain, snow, and ice) and its recent movement.

 

Android 

Available worldwide, Refreshes every 2 minutes

 

IOS 

Available in the US, Puerto Rico, Guam, Canada, Australia, South Korea, Northwestern Europe // Refreshes US every 2-min, all other locations 6-10 minutes

 

Severe Advisories

Precipitation Radar shows the location of precipitation, its type (rain, snow, and ice) and its recent movement.

 

Android 

Available in the USA, Canada, Europe // Refreshes every 2 minutes

 

IOS 

Available in the USA, Canada, Europe // Refreshes every 2 minutes

Storm Cells

 

Storm cell icons represent current behavior/observations of active storms.  

 

Android 

Available in the USA // Refreshes every 3 minutes

 

IOS 

Available in the USA // Refreshes every 3 minutes

Storm Reports

 

Storm Reports are significant information from storm spotters, such as amateur radio operatorsstorm chaserslaw enforcement officials, civil defense (now emergency management) personnel, firefightersEMTs or public citizens, about severe weather conditions in their warning responsibility area. Those reports are received by local National Weather Service offices (WFOs), and they can be used to issue Severe Thunderstorm WarningsTornado Warnings, and other weather warnings/bulletins. 

 

Android 

Available in the USA // Refreshes every 15 minutes

 

IOS 

Available in the USA // Refreshes every 15 minutes

Temperature 6-10 Day Outlook

 

Temperature outlook provides the probability (percent chance) that temps will either be hotter or colder in a specified area. Areas less than "equal" have a likelihood of experiencing cooler temperatures in the next 6 to 10 days.  

 

Android 

Available worldwide // Refreshes daily

 

IOS 

Available worldwide // Refreshes daily

Temperature Global Layer

 

Current temperatures are displayed worldwide. 

 

Android 

Available worldwide // Refreshes every 60 minutes

 

IOS 

Available worldwide // Refreshes every 60 minutes

Tropical Icons and Outlook

 

Current and projected data for tropical storms. 

 

Android 

Available worldwide // Refreshes every 1 to 6 hours

 

IOS 

Available worldwide // Refreshes every 1 to 6 hours

Wind Chill Advisory Layer

 

Wind chill is how cold it actually feels on your skin when the wind is factored in. It may also be referred to as the "feels-like" temperature. Wind Chill Temperature is defined only for temperatures at or below 50°F and wind speeds above 3 mph.

 

Android 

Available worldwide // Refreshes every 60 minutes

 

IOS 

Available worldwide // Refreshes every 60 minutes

Wind Current Conditions Layer

 

Current winds are displayed worldwide either in MPH or KPH. 

 

Android 

Available worldwide // Refreshes every 60 minutes

 

IOS 

Available worldwide // Refreshes every 60 minutes

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