evaluation of nwc saf precipitation products for the adriatic region izidor pelajić, p. mikuš...

Evaluation of NWC SAF Precipitation Products for the Adriatic Region

Izidor Pelajić, P. Mikuš Jurković, I. Smiljanić, N. Strelec Mahović

Meteorological and Hydrological Service Croatia

NWC SAF 2015 User’s Workshop | 24-26 February 2015 | Madrid, Spain 1

MOTIVATION:

• Croatian Adriatic coast is one of the rainiest areas in Europe

• Lack of radar coverage along the coast

• No precipitation data over the sea

NWC SAF 2015 User’s Workshop | 24-26 February 2015 | Madrid, Spain2

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Composite radar coverage

NWC SAF at DHMZ

• NWC SAF precipitation products used since 2012• Products calculated on two domains – Europe and Croatia

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Western EuropeCentral Europe-Mediterranean

Validation efforts• Verification still being performed– currently on case-to-case basis

• Comparison with:– radar data where available– Raingauges data – Aladin and ECMWF model forecasts

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11 September 2014 – 09 UTC

Torrential rain in Dalmatia (Vodice)Up to 280 mm/6 h

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ŠIBENIK

11 September 2014 – 09 UTCNWC SAF 2015 User’s Workshop | 24-26 February 2015 | Madrid, Spain

8

PGE 14 PGE 05

KNIN

503020151075321

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PGE 14 PGE 05

PGE 04

503020151075321

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PGE 05

PGE 04

PGE 14

Comparison with model data

NWC SAF 2015 User’s Workshop | 24-26 February 2015 | Madrid, Spain11

• PGE 14 Hourly accum.

• ECMWF 9 – 12 UTC accum.

9-10 10-11 11-12

Summary• From case to case observations it seems that precipitation

products from SAFNWC tend to underestimate low precipitation rates

• For intensive precipitation cases there is a signifficant difference between PGE14 (physical retrieval) and PGE05 products

• PGE05 seems to underestimate hourly accumulation rates • PGE14 seem to have more structures (features) in

precipitation field

NWC SAF 2015 User’s Workshop | 24-26 February 2015 | Madrid, Spain12

Unrelated notes on NWC SAF

• Winds• Extrapolation • Reprocessing old cases/dates• Documentation

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