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Understanding the regional and fine scale aspects of weather
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The Mesoscale and Microscale Meteorology Laboratory (MMM) aims to benefit society by increasing an understanding and knowledge of the mesoscale (1–1000 km) and microscale (10-6 – 1000m) aspects of weather.

MMM collaborates with other National Center for Atmospheric Research (NCAR) labs to improve Earth-system predictability through researching the process and prediction surrounding mesoscale and microscale atmospheric phenomena. MMM also plays a central role in the atmospheric simulation capability across NCAR.

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Our Models

We strive to produce the most accurate and effective computational models, data assimilation systems, and representations of unresolved weather and climate model processes

Model for Prediction Across Scales (MPAS)

Atmosphere, ocean and other earth-system simulation components

Weather Research & Forecasting Model (WRF)

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Research Sections

We are focused on improving the ways in which we communicate atmospheric processes and predictions, in order to help others understand how advances in atmospheric science will benefit society

Weather Extremes Across Scales

Identifying the multi-scale Earth System processes that drive extreme weather.

Dynamical & Physical Meteorology Section

Carries out basic and applied research on atmospheric phenomena spanning a wide range of scales

Prediction, Assimilation & Risk Communication Section

Studies advanced techniques for data assimilation and probabilistic weather forecasts, and the intersections between weather hazards and society

Weather Modeling & Research Section

Advancing research and development in mesoscale meteorology and numerical weather prediction

Geophysical Turbulence Program

Promote research, education and awareness of geophysical turbulence at NCAR and in the scientific community. Pages for historical purposes only

Our Forecasts

We utilize collaborations within NCAR and throughout the community to achieve more accurate mesoscale weather forecasts and climate prediction and projections. View our real-time forecasts below from various model output

WRF Forecasts

The current WRF forecasts for the weather today including precipitation, 100-500 hPa thickness, wind, and severe storm potential

AMPS Forecasts

Producing numerical guidance with twice-daily forecasts covering Antarctica

HRRR Forecasts

Neural Network Convective Hazard Forecast probability of any severe hazard within 40 km

Real Time Forecasts

Real-time forecasts produced with MPAS, WRF, IFS, and GFS models

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Upcoming Events

Tutorial
WRF Tutorial

Fall 2026

Mon, Oct 12 2026, 9am - Thu, Oct 15 2026, 5pm

VIRTUAL Tutorial - no in-person option

Tutorial
MPAS-Atmosphere and MPAS-JEDI Tutorials

Summer 2026

Mon, Aug 10 - Fri, Aug 14 2026, All day

NCAR Foothills Laboratory; Boulder, CO

Register Here

MMM Recent Publications

Dec 16, 2025

The Asian Summer Monsoon Chemical and Climate Impact Project (ACCLIP): An overview

Dec 1, 2025

Examining the temporal dynamics of risk communication during extreme weather events: Insights from a scoping review

Nov 14, 2025

All-sky AMSU-A radiance data assimilation using the gain-form of Local Ensemble Transform Kalman filter within MPAS-JEDI-2.1.0: Implementation, tuning, and evaluation

Oct 1, 2025

Severe weather in a changing climate (3rd edition)

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Postal Address:P.O. Box 3000, Boulder, CO 80307-3000•Shipping Address:3090 Center Green Drive, Boulder, CO 80301

This material is based upon work supported by the NSF National Center for Atmospheric Research, a major facility sponsored by the U.S. National Science Foundation and managed by the University Corporation for Atmospheric Research. Any opinions, findings and conclusions or recommendations expressed in this material do not necessarily reflect the views of the U.S. National Science Foundation.

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