What Is CBM Certification?

What the Certified Broadcast Meteorologist Credential Actually Is

The Certified Broadcast Meteorologist designation is a professional credential for people who deliver weather information to the public through television, radio, or other broadcast channels. It is a mark that a meteorologist has demonstrated two things at once: sound atmospheric-science knowledge and the ability to communicate that knowledge clearly on air.

That dual nature is what separates it from a purely academic qualification. A degree shows you studied the atmosphere. The CBM shows that a credentialing body has tested your scientific knowledge and then watched you apply it in real weathercasts. If you have been searching for a short definition, our related explainers on what CBM is and what CBM stands for cover the naming, while this article walks through how the certification itself works.

Who Issues It and Why It Carries Weight

The credential is administered through the American Meteorological Society's professional certification programs. AMS is the main professional organization for atmospheric and related sciences in the United States, so a seal from AMS signals peer-reviewed standards rather than a vendor-created badge.

Two parties are involved in delivery. AMS owns the standards, the application, the weathercast evaluation, and the credential itself. A third-party test provider handles the written test logistics. At the time of our review, SMT/Prometric is the current provider, although an older AMS FAQ still refers to PSI. If you are reading older forum posts or archived FAQ pages, expect that discrepancy and confirm the provider on your own appointment confirmation.

For a deeper look at how the credential fits into a career, see our analysis of whether the CBM certification is worth it.

The Two-Part Path: Written Test Plus Weathercasts

The CBM is not a single exam. It is a pipeline with two distinct evaluations, and candidates often underestimate the second one.

The two parts test different skills and are scored by different criteria. The weathercast evaluation criteria (graphical content, explanation, and presentation) are not written-test topic domains, and it is a mistake to study for one as though it were the other. A candidate can be strong in dynamics and still struggle to explain a forecast clearly in under five minutes, and the reverse is just as common.

Inside the Written Test: Format and Rules

The written component consists of 100 multiple-choice and true/false questions. The scored versus unscored split is not disclosed, so you should assume every question could count and avoid skipping anything. The test is closed book, and the passing score is 75%.

Timing deserves a caveat. A legacy-provider official FAQ lists 120 minutes, but because the provider has changed, you should reconfirm the time allowance on your current appointment details rather than relying on older documentation. Calculator and adaptive-testing rules were not verifiable in the public sources we reviewed, so check those directly with AMS or the test provider before exam day.

You apply through AMS first and only then schedule. Testing is available remotely or at a testing center, and you pick the delivery mode when you schedule. For specifics on what the 75% threshold means in practice, see our breakdown of the CBM passing score.

The Fifteen Subject Areas You Must Master

Preparation is organized around the fifteen substantive subject headings on the AMS CBM written-test reference list. These run from General Meteorological Knowledge through Winter Weather. The AMS Glossary of Meteorology entry that precedes them is a general terminology resource and is not counted as one of the fifteen.

One important point: these are issuer-published test-reference topics, not an official weighted or exhaustive blueprint. AMS publishes no topic percentages on these pages, and the reference list carries no numbered examination version. Any claim that a particular domain is "the highest-weighted" is guesswork. Treat all fifteen as fair game. Our companion piece, the complete guide to all 15 CBM content areas, goes subject by subject.

The Core Science Subjects

The Technology and Data Subjects

Four subjects cover the tools broadcasters rely on every day: Data & Instruments, Numerical Weather Prediction, Radar Meteorology, and Satellite. These reward candidates who actually interpret products rather than memorize definitions.

Data & Instruments and Satellite round out this group, covering observing systems, measurement principles, and interpretation of imagery and derived products.

The Hazard and Regional Subjects

This cluster maps most directly onto what viewers depend on you for: Severe Storm Structure/Tornadoes, Tropical Meteorology, Flooding, Winter Weather, and Weather Safety. Add Regional Weather, Climatology & Climate Change, and the Station Scientist heading, and you have the applied half of the reference list.

Station Scientist is the heading most specific to the broadcast job. It reflects the expectation that a broadcast meteorologist serves as a scientific resource within a newsroom, which means you should be ready for questions framed around professional practice rather than only textbook atmospheric physics.

The Weathercast Evaluation

After the written component, candidates submit two additional weathercasts, one active and one routine, with each running no more than five minutes. They are scored separately from the written test, and the average must be above 3.0 in each of three categories: Graphical Content, Explanation, and Presentation. Meeting the bar in one category does not offset falling short in another.

If you broadcast in Spanish, submissions require an English transcript. The weathercast step is where the credential earns its reputation, and it is why a broad on-air portfolio matters as much as scientific accuracy.

Eligibility: Degree and On-Air Experience

Eligibility is front-loaded, so confirm it before you pay anything. Requirements include an accredited meteorology or atmospheric-science degree, or an approved equivalent, along with the required coursework and transcripts. You also need 2 years of full-time or 3 years of part-time on-air experience. Work at a student station is excluded from that count. We did not verify any separate training-hour or reference requirement in the public materials.

Because the approved-equivalent pathway depends on your specific transcript, the safest move is to review the official criteria and, if your background is unusual, contact AMS before applying. Our CBM requirements guide lays out the eligibility questions in checklist form.

Fees, Scheduling, and Total Cost Mechanics

Costs are split between the application and per-scheduling testing fees, and AMS membership changes the price meaningfully.

Those first-attempt totals exclude AMS dues and any preparation materials. Note that the testing fee applies each time you schedule, so a retake adds that fee again. For a fuller walk-through, see the CBM certification cost breakdown, and for timing questions, our guide to CBM exam dates and scheduling.

Keeping the Credential Active

Earning the seal is not the end of the obligation. The credential is valid for one year, and renewal is annual at $206 for members or $515 for nonmembers. In addition, you must accumulate 28 professional-development points every five years. Plan for these recurring costs when evaluating the credential, because membership pricing applies to renewal just as it does to the application.

Who Cares About the Seal: Employers and Career Context

The natural audience for the credential is anyone working in or aiming at weather communication: television station meteorologists and chief meteorologists, radio and digital weather presenters, and broadcast professionals who want a recognized benchmark. News directors reviewing candidates often use the seal as a quick signal of both scientific grounding and on-air competence.

We deliberately avoid quoting salary numbers here because no verified figure belongs in this article. If compensation is your main question, read our CBM salary guide for how to think about it qualitatively, and browse CBM jobs for the kinds of roles where the credential tends to matter.

Sequencing Your Preparation by Subject

Since AMS publishes no topic weights, a sensible plan builds foundations first and applications second. One compact way to sequence the fifteen headings across a study window:

This sequencing is editorial, not an official blueprint, so adjust it to your own gaps. Broadcasters who work in a hurricane-prone market may need extra time on Tropical Meteorology, while those in the northern tier may spend longer on Winter Weather. For a fuller method, see our CBM study guide and the one-page CBM cheat sheet, and test yourself on the CBM practice test to find weak subjects early. If you are unsure how demanding the exam really is, read how hard the CBM exam is.

Frequently Asked Questions