Gateway Predictions

CMAQ Daily Average Total PM2.5 (Today)
CMAQ Daily Average Total PM2.5 (Tomorrow)

BlueSky Gateway air quality predictions are facilitated by the BlueSky Framework and represent the impacts of smoke from wildland fires, anthropogenic and biogenic sources from the EPA's National Emissions Inventory, and carryover smoke and emissions from the previous day. Sonoma Technology, Inc. uses the MM5 weather forecast model to drive the CMAQ model on a 36-kilometer grid. Predictions are currently generated twice a day and are posted in stages as results become available.



An early CMAQ run initialized at 1800 GMT (18Z) the previous day with preliminary fire data provides predictions for the current and next day, which are usually posted by 3:00 a.m. Eastern Standard Time. The main CMAQ run initialized at 0000 GMT (00Z) with updated fire data provides predictions on the following schedule:
  • Today's hourly predictions are usually posted by 4:30 a.m. Pacific Standard Time.
  • Tomorrow's hourly predictions and Today's Averages are usually posted by 6:30 a.m. Pacific Standard Time.
  • Day 3 hourly predictions and Tomorrow's Averages are usually posted by 8:30 a.m. Pacific Standard Time.
These results are produced through a partnership between Sonoma Technology, Inc. and the US Forest Service AIRFire Team.

CMAQ

The Community Multi-scale Air Quality (CMAQ) model is a three-dimensional, grid-based air quality model that can be applied to simulate concentrations of tropospheric ozone, fine particles, toxic air pollutants, acid deposition, and visibility degradation. For more information, see http://www.cmaq-model.org/.

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MM5

The mesoscale model (MM5) simulates mesoscale atmospheric circulation and was developed by Penn State University (PSU) and the National Center for Atmospheric Research (NCAR). It operates as a limited-area, nonhydrostatic, terrain-following, sigma-coordinate model. For more information, see http://www.mmm.ucar.edu/mm5/

National Emission Inventory (NEI)

EPA's Emission Inventory and Analysis Group periodically prepares national databases of air emissions information with input from numerous State and local air agencies, tribes, and industry. This database contains estimated air emissions of criteria air pollutants, criteria pollutant precursors, and hazardous air pollutants (HAPs), and information about the sources of these emissions.
For more information, see http://www.epa.gov/ttn/chief/eiinformation.html.