[Wrf-users] unrealistically narrow WRF precipitation bands

[David Ovens]

Hello,

We are wondering if other people have noticed unrealistically narrow
precipitation bands in WRF simulations using Kain Fritsch (old or
new)?  These occur over the ocean in our 12-km and 4-km nests when we
have the cumulus scheme turned on and the meteorological conditions
are such that the real atmosphere develops open cellular convection.
This is generally post-frontal in relatively low stability conditions.
Attached are 24-hour accumulated total rainfall plots showing these.


David
-- 
David Ovens		 e-mail: ovens at atmos.washington.edu
Research Meteorologist    phone: (206) 685-8108
Dept of Atm. Sciences      plan: Real-time MM5 forecasting for the
Box 351640                        Pacific Northwest
University of Washington          http://www.atmos.washington.edu/mm5rt
Seattle, WA  98195               Weather Graphics and Loops
                                  http://www.atmos.washington.edu/~ovens/loops
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