CAP Implementation atDeutscher Wetterdienst

Deutscher Wetterdienst – 10 April 2023

Warning process in DWD

Portfolio of warnings

Formats and publishing of warnings

CAP – a powerful data format

Status of implementation and route map

Open issues

First results

Next steps

Content

Deutscher Wetterdienst – 10 April 2023

Law on the Deutscher Wetterdienst § 4 (1) 3 : „… the issuance of warnings of weather occurrences that could become a danger for public safety and order …”

Types of warnings: Public warnings

• First candidate for CAP• Combination of more then 8 regions with 50 subareas per region and around 20

meteorological parameters• Different severity classes• Large number of products (upward trend!!)

Aviation warnings

Warnings for global exchange (subset of public and aviation warnings)

Warning process in DWD

Deutscher Wetterdienst – 10 April 2023

Portfolio of public warningsWater

Management

Lake warningsTransport/Traffic

Winterservices Event Organiser

Energy Provider

Disaster Management

Construction Industry

Public & Media

Avalanche Center

detaillierte Strassengebietswettervorhersage

Klimagebiet : Altmark Hoehenstufe: 0 - 200 Meter

ausgegeben am: Montag, den 12.01.2009 um 10:45 Uhr

von : Deutscher Wetterdienst, Regionalzentrale Leipzig

Uhrzeit 13 16 19 22 01 04 07 10 13

Bewoelkung 2 2 3 4 5 6 8 8 8

Niederschlag 0 0 0 0 0 0 R 0 R 1 R 0

Lufttemperatur 2 2 -0 -0 -0 0 1 2 3

Wind (km/h) S20 S20 S10 S10 S20 S20 S20 SW10 SW10

Boeen - - - - - - - - -

Streckentyp: Standard

Belagstemp. 0 -2 -4 -5 -5 -5 -2 0 1

Zustand: - - - - Reif Reif Reif nass nass

10637 * FRANKFURT/M     00860  5005 0111 0108 0     0

10637 +001 2301  14  13 /// /// 22 03 // --- --- 00 / 0 0 0 0 0 1026  14 000 000 -003

10637 +002 2302  14  13 /// /// 20 03 // --- --- 45 / 0 0 0 0 0 1026  13 000 000 -003

10637 +003 2303  14  13 /// /// 22 03 -- --- --- 45 / 0 0 0 0 0 1026  13 000 000 -003

10637 +004 2304  14  13 /// /// 21 02 // --- --- 45 / 0 0 0 0 0 1026  13 000 000 -003

10637 +005 2305  13  13 /// /// 21 03 // --- --- 45 / 0 0 0 0 0 1026  13000 000 -003

NWP Models, -Procedures Observation-Networks Visualisation with Ninjo Forecaster

Production of Bulletins, Warnings, Datasets (e.g. OMEDES, PVW)

Deutscher Wetterdienst – 10 April 2023

Formats and publishing of warnings

• Default format (text, ia5)

• Non standardised xml formats

Publishing and distribution of public warnings

• Webbased applications like (DWD or Meteoalarm frontends)

• Customised distribution via fax, email, ftp, sms and other

• Published via DWD ftp server

Problems:

• Text format (“unsuitable” input format for applications)

• Different customised (“hand-made”) xml formats

Formats and publishing of public warnings

Deutscher Wetterdienst – 10 April 2023

DWD standard format of xml-based warnings (reduction of customised formats)

Standard input format of warning applications (next generation)

CAP – a powerful data format of warnings

Deutscher Wetterdienst – 10 April 2023

First draft implementation for public warnings

Access to draft CAP output via DWD ftp-server:

For details, please contact:

• reik.schaab@dwd.de

Operational Summer 2011:

• 1. step: CAP only as an addionally output format for public warnings

• nexts steps: CAP as standard format of warnings and other warning products

Using CAP schema for data exchange between different systems (DWD internally)

Status of implementation and route map

Deutscher Wetterdienst – 10 April 2023

CAP only as an addional format

Official Start: June 2011

• Using only a subset of CAP possibilities

• Well-defined classes of warning

Deutscher Wetterdienst – 10 April 2023

Using the full functionality of CAP

New products like:

• Warning with detailed geo references

• Warning status for different areas

• …

Next generation:

Deutscher Wetterdienst – 10 April 2023

Powerful xsd schema (Version 1.1, draft version 1.2)

But some problems:

- Critical points:

- meteorological parameters (<parameter>-tag)

- Altitude and ceiling values (<altitude>-, <ceiling>-tag) compliant to German / European law

- Nice to have:

- Message ID (<identifier>-tag): ID managed by WMO repository AND orginator

- Authority ID (<sender>-tag): ID managed by WMO repository email

Open Issues

Deutscher Wetterdienst – 10 April 2023

Description of meteorological parameters (1)

Problem:Using the <parameter>-tag as“machine-readable” element formeteorological parameters:

• Combination of value and unit,

• Ranges of values (e.g. between 10 and 20; > 20 or < 20)

DWD / Meteoalarm (first workaround)

draft Version 1.2 (workaround)

first idea

!

Workaround:

Deutscher Wetterdienst – 10 April 2023

Description of meteorological parameters (2)

Proposal b)Proposal a)

Deutscher Wetterdienst – 10 April 2023

Altitude / ceiling – compliant to German low

CAP version 1.1 CAP draft version 1.2

Proposal (unit as optional attribute)

with optional attribute (“meter”)

without optional attribute (“feet”)

Deutscher Wetterdienst – 10 April 2023

Publishing public warning (only as addionally format) via DWD ftp server (for details see: http://www.dwd.de: “Special Users, Basic information supply”): June 2011

Designing a “DWD” profile

Development of CAP based applications like “apps” or “visualisers”

Next steps

Deutscher Wetterdienst – 10 April 2023

Contact:

Dr. Siegfried FechnerDeutscher WetterdienstOffenbach

E-Mail: siegfried.fechner@dwd.de