- The Short Answer: What CBM Means Here
- Why the Acronym Causes Confusion
- What the Credential Represents
- Who Grants It and How You Apply
- The Written Exam: Format and Rules
- The Fifteen Subject Areas You Must Master
- The Weathercast Evaluation: A Separate Hurdle
- Costs, Validity and Renewal
- Who Cares About the Credential
- Sequencing Your Preparation by Domain
- Frequently Asked Questions
- CBM here means Certified Broadcast Meteorologist, a credential from the American Meteorological Society (AMS).
- The written test has 100 multiple-choice/true-false questions, with a 75% passing score.
- Candidates also need two approved weathercasts, each five minutes maximum, averaging above 3.0 in three categories.
- AMS publishes fifteen unweighted subject headings, from General Meteorological Knowledge through Winter Weather.
The Short Answer: What CBM Means Here
On this site, CBM stands for Certified Broadcast Meteorologist. It is a professional credential administered by the American Meteorological Society (AMS) for meteorologists who communicate weather on the air. Holding it signals that you have demonstrated two separate things: command of the atmospheric science behind a forecast, and the ability to present that science clearly and responsibly to a television or video audience.
If you landed here looking for a different meaning of those three letters, you are in the right place only if you work in, or want to work in, broadcast weather. For the full wording and history of the abbreviation, see our companion explainer, What Does CBM Stand For?, and the broader overview at What Is CBM Certification?.
Why the Acronym Causes Confusion
Three-letter acronyms are shared across many industries, and "CBM" is used by several unrelated certifications and technical terms. A search for the term can return results about entirely different credentials, with different certifying bodies, different fees, and different exam structures. None of that applies to the Certified Broadcast Meteorologist credential.
This matters practically. Candidates who study from the wrong credential's materials waste weeks on content that will never appear on the AMS written test. The rest of this article sticks strictly to the broadcast meteorology credential. If you want a shorter definition first, try CBM Meaning or What Is A CBM?.
What the Credential Represents
The CBM is a two-part demonstration of competence. The first part is a written examination covering the scientific foundation of weather forecasting and communication. The second part is a weathercast evaluation, in which reviewers judge your actual on-air work. Passing one without the other does not earn the credential.
The educational and experience foundation
Before you can even sit for the written test, you must show that you are qualified for the program. The public program requirements call for:
- An accredited meteorology or atmospheric-science degree, or an approved equivalent, with the required coursework documented through transcripts.
- Two years of full-time on-air experience, or three years part-time.
- On-air work that is real broadcast experience; student-station work is excluded.
That experience requirement is what separates this credential from a pure knowledge test. It is designed for working broadcasters, not students. For the full eligibility walkthrough, read CBM Requirements 2026: Eligibility, Prerequisites & How to Qualify.
Who Grants It and How You Apply
The American Meteorological Society runs the program, and you apply through AMS before you schedule any testing. The written exam itself is delivered through a third-party testing provider. The current provider is SMT/Prometric, although an older AMS FAQ still names PSI, so confirm the provider and rules on your own appointment confirmation rather than relying on older documents.
Testing is available remotely or at a testing center. The fee structure has several layers, which is why many candidates are surprised by the total:
| Fee Component | Member | Nonmember |
|---|---|---|
| Application fee | $330 | $660 |
| Remote testing, per scheduling | $60 | $60 |
| US test center, per scheduling | $75 | $75 |
| International test center, per scheduling | $85 | $85 |
| Remote first-attempt total (excluding dues and prep) | $390 | $720 |
Note that the testing fee is charged each time you schedule, so a retake adds cost. The member/nonmember gap is large enough that it is worth comparing AMS membership dues against the savings. Our CBM Certification Cost 2026: Complete Pricing Breakdown walks through the arithmetic in detail.
The Written Exam: Format and Rules
The written portion is a closed-book test with 100 multiple-choice and true-false questions. AMS does not disclose how many of those items are scored versus unscored, so do not assume every question counts equally toward your result. The legacy provider's official FAQ listed a 120-minute time limit; reconfirm the exact allotment against your current appointment details, since provider documents have changed over time.
Passing score
The written passing score is 75%. Current written-exam pass rates are not publicly disclosed. One thing worth being careful about: a 2019 AMS Board note estimated that about half of candidates passed the first weathercast evaluation, but that figure describes the on-air review, not the written exam, and it is not a current statistic. Treat it as context rather than a benchmark for the written test. For a fuller discussion, see CBM Pass Rate 2026: What the Data Shows and CBM Passing Score 2026: Exactly What You Need to Pass.
The Fifteen Subject Areas You Must Master
AMS publishes a written-test reference list organized under fifteen substantive subject headings. These are issuer-published reference topics, not a weighted or exhaustive blueprint: AMS posts no topic percentages, so be skeptical of any source claiming one domain carries a specific share of the exam. The AMS Glossary of Meteorology that precedes the list is a general terminology resource and is not counted as a subject area.
The fifteen areas are:
- General Meteorological Knowledge
- Climatology & Climate Change
- Cyclones and Jets
- Data & Instruments
- Flooding
- Numerical Weather Prediction
- Physical Meteorology
- Radar Meteorology
- Regional Weather
- Satellite
- Severe Storm Structure/Tornadoes
- Station Scientist
- Tropical Meteorology
- Weather Safety
- Winter Weather
A deeper breakdown of each heading is in CBM Exam Domains 2026: Complete Guide to All 15 Content Areas. Below are the areas where candidates most often need to think beyond textbook definitions.
Radar Meteorology and Satellite
Broadcasters interpret these products live, so expect questions that go past definitions into what an image or return actually indicates.
- How radar velocity and reflectivity products reveal rotation, hail, and precipitation structure
- Limitations of radar, including beam height, range, and clutter
- Reading satellite channels and what each reveals about clouds, moisture, and temperature
Severe Storm Structure/Tornadoes and Weather Safety
These two areas connect forecasting to the on-air responsibility of warning the public.
- Storm types, supercell structure, and the environments that favor tornadoes
- How warnings are communicated and what messaging protects life
- The broadcaster's role during fast-moving severe events
Numerical Weather Prediction and Data & Instruments
A working forecaster must understand where model guidance comes from and where it fails.
- How models ingest observations and why different models disagree
- Common model biases and how to weigh guidance
- How instruments measure the atmosphere and what their error sources are
Station Scientist
This heading reflects the broader role many broadcast meteorologists play inside a station, beyond the forecast segment itself. Review the official reference list for the exact materials AMS points candidates toward, since this area is easy to overlook when you focus on forecasting science.
Because AMS does not weight these areas, a sensible approach is to treat all fifteen as fair game and allocate extra time to your personally weakest ones. Our CBM Cheat Sheet 2026 condenses the high-yield facts, and you can test yourself on the actual question style with the CBM practice tests.
The Weathercast Evaluation: A Separate Hurdle
The weathercast evaluation is not part of the written test and is not a written-test domain. It is a separate review of your on-air work. Candidates submit two additional weathercasts, which must be active and routine (not specially staged for the evaluation), and each is a maximum of five minutes.
Reviewers score the broadcasts, and you must achieve an average above 3.0 separately in each of three categories:
- Graphical Content
- Explanation
- Presentation
Because each category must clear the bar on its own, a strong score in one area cannot compensate for a weak one. Spanish-language submissions are accepted but require an English transcript. Many candidates underestimate this component because the written exam gets most of the attention; plan your weathercast selection early rather than treating it as an afterthought.
Key Takeaway
Treat the written exam and the weathercast evaluation as two projects with two different skill sets. Studying atmospheric science will not fix a weak Presentation score, and polished delivery will not rescue gaps in Radar Meteorology or Numerical Weather Prediction. Prepare for both in parallel.
Costs, Validity and Renewal
The credential is valid for one year and must be renewed annually. Annual renewal costs $206 for members and $515 for nonmembers. In addition, holders must accumulate 28 professional-development points every five years to remain current.
These recurring obligations are an important part of the real cost of holding the credential, not just earning it. Weigh them honestly when deciding whether the credential fits your career plan. Our analysis in Is the CBM Certification Worth It? Complete ROI Analysis 2026 frames that decision, and CBM Salary Guide 2026: Complete Earnings Analysis covers compensation context.
Who Cares About the Credential
The credential is aimed at meteorologists working in broadcast: television stations, and increasingly digital and streaming weather operations. Because it requires documented on-air experience, it is most relevant to people already working in front of a camera or building toward that role.
Hiring weight varies by market and employer. Some news directors treat it as a meaningful signal of scientific credibility and communication standards; others value on-air performance and local experience more heavily. We do not publish guessed salary premiums or hiring statistics here, since none are verified. To explore the career side, see CBM Jobs, and for the full credential overview, CBM Certification.
Sequencing Your Preparation by Domain
Rather than generic study habits, the most useful planning tool is ordering the fifteen subject headings so that foundational material comes first and applied, product-interpretation topics build on it. One reasonable sequence follows. Adjust it to your own gaps.
Foundations
- General Meteorological Knowledge and Physical Meteorology, since later topics assume this vocabulary
- Skim the AMS Glossary of Meteorology for terminology
Observation and Prediction
- Data & Instruments, Satellite, and Radar Meteorology
- Numerical Weather Prediction, including model strengths and limits
Hazardous Weather
- Cyclones and Jets, Severe Storm Structure/Tornadoes, Flooding
- Winter Weather and Tropical Meteorology
Context and Communication
- Climatology & Climate Change, Regional Weather, Station Scientist
- Weather Safety, and a full timed practice run against your practice test results
For a complete method built around these areas, our CBM Study Guide 2026: How to Pass on Your First Attempt goes further, and How Hard Is the CBM Exam? Complete Difficulty Guide 2026 helps you gauge how much time to budget. If you want structured preparation support, browse CBM Training. Scheduling windows and deadlines are covered in CBM Exam Dates 2026: Testing Windows, Deadlines & Scheduling.
Frequently Asked Questions
CBM stands for Certified Broadcast Meteorologist, a credential from the American Meteorological Society. It recognizes meteorologists who demonstrate both strong scientific knowledge and effective on-air weather communication.
The written exam has 100 multiple-choice and true-false questions, taken closed book, with a 75% passing score. AMS does not disclose how many items are scored versus unscored, and the time limit should be confirmed against your current appointment.
No. The weathercast evaluation is a separate component. You submit two active, routine weathercasts of up to five minutes each, and you must average above 3.0 separately in Graphical Content, Explanation, and Presentation.
No. AMS lists fifteen unweighted subject headings in its written-test reference list and publishes no topic percentages. Any claim that one domain makes up a specific share of the exam is not supported by the public materials.
The credential is valid for one year. Annual renewal is $206 for members and $515 for nonmembers, and holders must also earn 28 professional-development points every five years.