PGS: Numerical Weather Prediction

The December meeting of the Potomac Geophysical Society will be held December 16th at the Fort Myer Officers’ Club in Arlington, VA ( in the Campaign Room.

This month’s talk will be: Numerical Weather Prediction – Fundamentals and State of the Art by Dr. Ananthakrishna Sarma, Center for Atmospheric Physics, SAIC, McLean, VA.


Numerical Weather Prediction (NWP) refers to the process of determining the future state of the atmosphere using numerical algorithms and computers. Even though significant advances have been made in this field, we cannot categorically say that “we can predict weather accurately”. There are several reasons why weather prediction is inherently difficult. We will examine these reasons. We will also explore SAIC’s Operational Multiscale Environment model with Grid Adaptivity (OMEGA) as an example of a state of the art NWP system.

Biographical Information:

Dr. Sarma is a Senior Scientist and a Technical Fellow at SAIC. He has an MS in Meteorology from South Dakota School of Mines and Technology and a Ph.D. in Atmospheric Science from Colorado State University. His fundamental expertise is in the modeling of the atmosphere including cloud physics and atmospheric chemistry. He joined SAIC as a Research Scientist in 1986. While at SAIC he has worked on a range of atmospheric modeling problems ranging from routine weather prediction to simulating nuclear fireball clouds.

Dinner Menu

Mahi Mahi, Cooked with Tomatoes, capers in lemon sauce (House salad & vegetables, rolls and butter)

Tira Misu

Coffee / tea

A vegetarian meal can be substituted by request.

Reception at 6:30. Dinner at 7:30. Talk at 8:30 PM. Please note that the talk starts earlier than the usual time. Allow 15 minutes for security entering Ft. Myer as all civilian vehicles are searched. To ensure access to and from Fort Myer use the Hatfield Gate, open 24 hours a day ( If you wish to attend dinner ($25), please make reservations with Joydeep Bhattacharyya at 571-269-8432 or via E-mail at If you wish, please feel free to attend the talk without dinner. Non-members and guests are welcome. Visit the PGS web site at for new meeting announcements, etc. Please send changes of address or email to


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