NWP at the Italian Meteorological Service:

STATUS REPORT

29th EWGLAM, Dubrovnik, 8-11 October 2007

Massimo Bonavita, Lucio Torrisi, Antonio Vocino and Francesca Marcucci

CNMCA

Italian Meteorological Service

Pratica di Mare, Rome, Italy

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NWP at the IMS

Domain size 769x513

Grid spacing 0.125° (14 Km)

Number of layers 40

Time step 150 sec

Forecast range 72 hrs

Initial time of model run 00/12 UTC

L.B.C. IFS

L.B.C. update frequency 3 hrs

Initial state CNMCA 3D-VAR

Initialization Digital Filter

External analysis None

Status Operational

Hardware IBM P690 (ECMWF)

N° of processors used 32 (Model), 90 (Analysis)

29th EWGLAM, Dubrovnik, 8-11 October 2007

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Domain size 641 x 401

Grid spacing 0.0625 (7 km)

Number of layers 40

Time step 40 s

Forecast range 72 hrs

Initial time of model run 00 UTC

Lateral bound. condit. IFS

L.B.C. update freq. 3 hrs

Initial state Interpolated 3D-VAR

Initialization D.F.I.

External analysis T,u,v, q, SP

Special features Filtered topography

Status Operational

Hardware IBM P690 (ECMWF)

N° of processors 120

Initial Conditions: Interpolated 14 Km 3D-VAR analysis

29th EWGLAM, Dubrovnik, 8-11 October 2007

NWP at the IMS

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NWP at the IMS

Operational fromearly 2008.• Meet Hydrology-

SAF programme obligations

• Help with opportunity LAM EPS efforts

• Facilitate comparison with other European wide high resolution modelling systems

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NWP at the IMS

The 2.8 km COSMO-IT has been running at the Italian Met. Service since October 2006. Intensive verification and tuning of the model has been performed over this period to reach an operational level of skill. Some of the most significant steps: • Multi-layer soil (Schrodin

& Heise, 2001) • Semi-lagrangian

advection of humidity variables (Baldauf, 2005)

• Time integration step tuning (winter storms)

• Introduction of observation nudging for model initialization

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3rd SRNWP Workshop on short-range EPS

www.meteoam.it

srepsws@meteoam.it

Rome, 10-12 December 2007Università Roma I “Sapienza”