AERMOD Wizard 1.06 is here

Posted by on Sunday, October 31st, 2021 in Newsletters


What’s Happening Now


EPA News

Revised Draft Guidance for Ozone and Fine Particulate Matter Permit Modeling – EPA has released updated draft permit modeling guidance for ozone and particulate matter (PM2.5). This revision has been released for public comment and comments are due to EPA by November 19, 2021. You can download this document here.

EPA presented a webinar on this revision on Thursday, October 14, 2021. You can view the slides for the webinar here.

Other News

Modeling for Non-Modelers Class – Given the importance that modeling plays in demonstrating compliance, we think that all stakeholders of the air quality permitting team (client/applicant, permit application preparer, modeler, attorney, etc.) need to have a basic understanding of air quality modeling. Do you know a manager, an attorney, or a client who knows just enough about dispersion modeling to be dangerous? Wouldn’t it be better if that person knew enough about dispersion modeling to understand the basic modeling process and regulatory drivers, knew how to interpret modeling results and knew when it was necessary to bring a modeling expert into the decision-making process? If so, our Modeling for Non-Modelers class is for them. This 1-day class doesn’t get into the nitty gritty of running the model, but it does familiarize students with enough of the process so that they can make informed decisions when it comes to dispersion modeling. We are tentatively planning to present this class during the first quarter of 2022. For more information, email us at

Conferences and Workshops

As you might imagine, face to face meetings and conferences are currently rare, but good news is on the horizon! We encourage you to check organizations’ websites to find out the latest on upcoming conferences and workshops.

AWMA ACE 2022 – As always, next year’s Annual Conference and Exhibition (ACE) is never that far off. ACE 2022 is back to being an in-person event and will be held in San Francisco, CA from June 27 to June 30, 2022 at the Hyatt Regency San Francisco. Watch for details.

AWMA ACE 2023 is slated to be held in Orlando, FL.

Upcoming Modeling Specialty Conference – Although it’s a bit early, there is a movement afoot to hold another AWMA-sponsored modeling specialty conference. It will most likely be in Research Triangle Park, NC and it’s looking to be in the fall 2022/spring 2023 timeframe.

AWMA is also sponsoring webinars and you can find out more about them at

If your company, organization, agency, state, etc. has an upcoming modeling or air quality-related event (virtual or otherwise) and you’d like it publicized in Providence/Oris Notes, please send that information to us at, and we’ll be happy to include it.



BEEST 12.07 is coming out in November. It will include bug fixes, the new ALPHA options found in AERMOD 21112 and a new version of WindRose.

Users in maintenance can download the most recent version of BEEST from Support → Software Updates.

“Go BEEST Mode!” – NEW THIS YEAR! – Go BEEST Mode face masks! These stylish and functional masks will be the perfect complement to your Go BEEST Mode t-shirt. These are washable/reusable and are a one size fits all. So get yours today by sending your request to

And of course, we still have plenty of Go BEEST Mode t-shirts, too! You can also request one of those by emailing us at

AerScreen for Windows

AerScreen for Windows 4.02 is now out. This update has the following enhancements:

  • Includes AERSCREEN 21112 and AERMOD 21112
  • The Adjust U* option has been enabled by default
  • The website for downloading terrain data files has been updated
  • The user manual for Terrain Files Converter has been updated


Users in maintenance can download the most recent version of AerScreen for Windows from Support → Software Updates.

Professional CalPuff

Our most recent version of Professional CalPuff (4.00) was released August 26, 2016 and is available to all registered users with current maintenance.

Users in maintenance can download the most recent version of Professional CalPuff from Support → Software Updates.


AERMOD Wizard 1.06 is now out. This update has the following enhancements:

  • Allows you to download EPA ambient monitoring data published in May 2021
  • Now runs AERMET 21112
  • Allows you to select the set of data to use when processing monitoring data files
  • Fixes issue where the surface station list files contain multiple stations with same location but different IDs
  • Includes a new version of WindRose


We will be presenting a webinar on the new features of AERMOD Wizard 1.06 on November 4 at 3 pm CDT. Click here to sign up for the webinar.

Users in maintenance can download the most recent version of AERMOD Wizard from Support → Software Updates.

If you have suggestions for an enhancement to any of our modeling software products, please let us know and we’ll do our best to incorporate it into the software ASAP!

Modeling Tip of the Month

So, you’ve loaded in all of your sources, fence lines, tanks, and buildings into BEEST. But before you can go any further, your CAD person comes in and tells you that the plot plan that you’d used to help set up your buildings, fence lines, tanks, and sources is off. Problematic? Not in BEEST! BEEST has a built-in Rotate feature you can access that allows you to quickly and efficiently make changes to one or all of your on-screen objects (buildings, fence lines, tanks, and sources).

First, go into File → Preferences → General Setup and make sure “Allow Rotation” is selected. Then, go to Show Current Data Graphically. Click the Options button on the left hand side array of buttons and then click the Rotate tab.

You now have the ability to select None, All, or a Selected subset of each of your objects. On the right hand side of this form, you can put in an origin point (in UTM coordinates) about which to rotate the selected objects, or X and/or Y values to shift/translate your objects. The nice thing is you can mix and match – some objects might only need to be shifted, some only need to be rotated, some shifted a different distance than others, etc. Very useful!


We want to note that many folks use our classes as credit toward professional engineer continuing education requirements. Check with your state’s licensing board or the National Society of Professional Engineers (see here or here) for more information on what is required.

AERMOD Modeling for Permits

Our next scheduled AERMOD Modeling for Permits class will be November 16-17, 2021 and will be an online class. Sign up today and plan to join us in the virtual world! If you want to register, click here.

Advanced AERMOD

Similarly, our next scheduled Advanced AERMOD class will be November 18-19, 2021 and will also be online.

Advanced AERMOD covers those topics that are near and dear to modelers, such as:

  • NAAQS modeling for 1-hour NO2, 1-hour SO2 and 24-hour PM2.5 (including MaxDCont Viewer)
  • Meteorological data processing with AERMET/AERMINUTE/AERSURFACE
  • Changes related to the new Appendix W (Guideline on Air Quality Models)
  • MAXIFILE and ARRAY2 processing
  • AERMOD Wizard and its uses


To register for Advanced AERMOD, click here.

Don’t forget, if our schedule of classes doesn’t mesh with your schedule, or if you have several people that need to be trained at once, contact us about setting up your own onsite or online class.

2022 Providence/Oris class schedule

AERMOD Modeling for Permits
February 15-16 – online
May 17-18 – location TBD
August 23-24 – location TBD
December 6-7 – location TBD

Advanced AERMOD
February 17-18 – online
May 19-20 – location TBD
August 25-26 – location TBD
December 8-9 – location TBD

Even though locations have not been firmed up for all of the 2022 classes, we are currently anticipating some of these will still be virtual; hopefully, at least half will be in‑person.



BeestXpress users have some great system enhancements to work with:

  • The “Job Details” webpage now displays the pollutant being modeled;
  • The “Job Details” webpage now displays run progress for MAXDCONT calculations;
  • Modeling runs with multiple partitions now include a combined AERMOD input file (*.DTA) in the output .ZIP file;
  • Added an option to the “Submit Job” webpage that affects modeling runs with multiple partitions: the intermediate output files created by each partition can be omitted from the output .ZIP file
  • The “Job Search” webpage now includes the option to search by project number
  • Users have access to up to 50 partitions per AERMOD run


To date, BeestXpress has processed over 450,000 AERMOD runs.

If you’ve never used BeestXpress, or it has been a while since you did, you may want to log on at to take advantage of our AERMOD “force multiplier”. That AERMOD run that might have taken a day to run on your desktop computer can finish in an hour or less on BeestXpress. When time is money, BeestXpress is the best modeling return on investment there is!

BeestXpress now runs AERMOD 21112.

Meteorological Data Processing Services

Do you need AERMOD-ready or CalPuff-ready meteorological data? If so, we can help! Whether it’s running the AERMET/AERMINUTE system or a full CalMet run, Providence has the background, know-how, and experience to have your data processed and ready for you ASAP. Need on-site data processed? We do that, too! If you’d like more information, contact us at or

Consulting Solutions

One thing that we’re very proud of is the depth and range of our modeling experience and expertise. The kinds of air quality models we’ve used include all types, ranging from simple screening tools like SCREEN and AERSCREEN to plume models like ISC and AERMOD to CalPuff. The types of analyses included basic Significant Impact Level, NAAQS, PSD increment consumption, Class I analyses, air toxics, and SIP attainment demonstrations. So, we’ve seen it all. To that end, should you or your clients need additional modeling assistance or just a second set of eyes to QA or peer review your modeling (ranging from initial protocol up to final submission), we stand ready to help. Feel free to contact us at (512) 258-8855, (828) 628-0634 or



Calendar separator

November 16-17, 2021
AERMOD Modeling for Permits

November 18-19, 2021
Advanced AERMOD

Profound Thought of the Month: You can’t have everything. Where would you put it? – Steven Wright