www:thehunterreport.com

WHAT IS A CODE ORANGE OZONE DAY?

BY: PAT HUNTER

 
    Air Quality Index (AQI) Values)  When the AQI is in this range: Levels of Health Concern Colors
0-50 Good Green
51-100 Moderate Yellow
101-150 Unhealthy for Sensitive Groups  

Orange

151 to 200 Unhealthy Red
201 to 300 Very Unhealthy Purple
301 to 500 Hazardous Maroon

 

CLICK TO WEB LINKS

AIRNOW.GOV

A GUIDE TO AIR QUALITY & HEALTH BROCHURE - AIR NOW

Science Daily: Ozone Levels May Raise Risk Of Underweight Births

Understanding the AQI

The purpose of the AQI is to help you understand what local air quality means to your health. To make it easier to understand, the AQI is divided into six categories:

Each category corresponds to a different level of health concern. The six levels of health concern and what they mean are:

SOURCE: AIR QUALITY NOW WEBSITE

AQI colors 

EPA has assigned a specific color to each AQI category to make it easier for people to understand quickly whether air pollution is reaching unhealthy levels in their communities. For example, the color orange means that conditions are "unhealthy for sensitive groups," while red means that conditions may be "unhealthy for everyone," and so on.

Forecast: Code-orange air quality alert, scattered showers, thunderstorms

By News Sentinel staff

Monday, July 4, 2011

 

KNOXVILLE — A code-orange air quality is in effect for much of Independence Day in East Tennessee, including Knoxville, the the Smokies, Tri-Cities and Chattanooga.

The alert means that ground-level ozone concentrations may approach or exceed unhealthy standards, causing problems with sensitive groups.

Later today a weak cold front approaching the Southern Appalachian region will trigger scatter showers and thunderstorms, some of which may be severe with damaging winds, large hail and locally heavy rainfall.

This stationary front will linger in the Tennessee Valley for several days while another weak cold front will approach the region Thursday. These fronts may produce severe storms daily.

The Knoxville-area forecast for today calls for about a 60 percent chance of showers and thunderstorms this afternoon. Otherwise it will be partly sunny and hot with a high near 92. Overnight a 40 percent chance of scattered showers and thunderstorms is possible with a low around 69.

Rain is possible the rest of the week through Sunday with the best chance overnight Tuesday.

Tuesday’s forecast calls for a 40 percent chance of showers and thunderstorms with a high near 91. A 50 percent chance of rain is possible overnight with a low around 68.

A 40 percent chance of showers and thunderstorms is possible Wednesday with partly sunny skies, high near 92, low around 68.

Thursday will see a 30 percent chance of showers and thunderstorms in the afternoon with partly sunny skies, high near 91, low around 69.

It will be partly sunny and hot Friday with a 40 percent chance of showers and thunderstorms, high near 91, low around 68.

A 30 percent chance of showers and thunderstorms is possible Saturday with a high near 92, low around 70.

Sunday’s high will be near 94 with a 40 percent chance of showers and thunderstorms under partly sunny skies.

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