Air Quality Awareness Week - April 28 through May 2


                                                                                                                       National Air Quality Awareness Week

The National Weather Service (NWS) and the U.S. Environmental Protection Agency (EPA) urge Americans to be aware of “What’s your Air Quality IQ?” during Air Quality Awareness Week, which runs from April 28 through May 2, 2014.

The goal of Air Quality Awareness Week is to provide information on outdoor air pollution and its impact on the quality of the air we breathe. This year’s theme is “What’s your Air Quality IQ?”  A different air quality topic will be addressed each day, from the causes of poor air quality and how air quality predictions are made, to how to protect yourself on poor air quality days, and steps you can take to improve the cleanliness of the air we breathe.


For more information on Air Quality Awareness Week, please go to NWS Air Quality Awareness (


                                                                                                                  Our Nation’s Air Quality Forecast Capability

Have you checked the NWS’ air quality forecast guidance lately? Exposure to ozone and fine particulate matter is responsible for tens of thousands[1] of premature deaths each year in the US. For the last few years, the NWS, in conjunction with the EPA, has produced forecast guidance out to 48 hours for predicted surface concentrations of ozone and smoke nationwide, and predictions of surface concentrations of dust over the lower 48 states (CONUS).


NOAA NWS’ hour-by-hour forecast guidance, at 12km grid resolution, shows when and where predicted values of ozone, smoke from wildfires, and dust from dust storms are expected to reach harmful levels, whether in cities, suburbs or rural areas. We have been working to provide the United States with ozone, particulate matter and other pollutant forecasts with enough accuracy and advance notice to allow people to take action to prevent or reduce adverse effects.


Ozone forecasts are produced with a linked numerical predictions system: Nonhydrostatic Meteorological model on the B grid (NMMB) predictions drive the Community Multiscale Air Quality (CMAQ) model developed by NOAA researchers for the US EPA. EPA provides the information on pollutant emissions and monitors data on ground-level ozone and fine particles used in the verification and evaluation of developmental products.


The Smoke Forecast Tool integrates NOAA’s National Environmental Satellite, Data, and Information Service’s (NESDIS) satellite information on the location of wildfires, with NWS weather inputs from its NMMB model, and smoke dispersion simulations from NOAA’s Office of Oceanic and Atmospheric Research’s HYSPLIT model, to produce a daily 48-hour prediction of smoke transport and concentration. The model also incorporates U.S. Forest Service estimates for wildfire smoke emissions based on vegetation cover.


Dust forecasts over CONUS are standalone predictions of airborne dust from dust storms. Source regions with emission potential are estimated from the climatology of Moderate Resolution Imaging Spectroradiometer (MODIS) Deep Blue aerosol retrievals. Dust emissions are predicted when surface winds exceed thresholds over source regions and they are modulated by real-time soil moisture information. The HYSPLIT model combines NMMB weather inputs with dust emissions to predict transport, dispersion, and deposition of dust, resulting in 48-hour prediction of dust concentrations.


State and local air quality forecasters, for more than 400 communities across the US, interpret NWS guidance, along with pollution monitoring data and other inputs, to provide next-day alerts of impending poor air quality. Alerts for roughly 100 of those communities are based on both expected high concentrations of ozone and fine particulate matter, with alerts for the remainder based on ozone only.


Our NWS Weather Forecast Offices (WFOs) and our National Centers for Environmental Prediction (NCEP) are encouraged to share their weather expertise in coordination with their corresponding state and local air quality forecasters. Since the initial operational implementation of NWS’ air quality forecast guidance in 2004, NWS forecasters have been increasing their working partnerships with state and local air quality forecasters.


NWS Air Quality Forecast Guidance is available on the web at


Additional experimental ozone predictions, from coast to coast, are available on


Detailed information on our Air Quality Forecasts is available at


If you have questions on NWS’ Air Quality Forecasting Program, please feel free to contact Jannie Ferrell, our NWSH OCWWS’ Fire and Public Weather Services Branch Air Quality Forecasting Outreach Coordinator, at (301-713-1867 x 135), OR Ivanka Stajner, our NOAA/NWS/OST Program Manager, Air Quality Forecast Capability, at (301-713-9001 x185).

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