Usage and experience of ALADIN by forecasters and end-users in Czech Republic ALADIN Forecasters meeting (Ankara, Turkey; SEPTEMBER 2014) Tomas Mejstrik

Outline NWP model ALADIN is used for wide variety of products in CHMI Forecasters uses Visual Weather environment to make most of weather forecasts and products Output from ALADIN in graphical, tabular form Compare ALADIN model and other NWP model with forecaster

Usage of model ALADIN Use of ALADIN for making weather warnings Special forecasts for energetic companies Tabular and graphical forecast Meteograms Mobile applications

Common usage Meteogram

Weather warnings Instability parameters

Weather warnings Instability parameters

Convective parameters Weather warnings

Simple parameters Tabular forecasts FXCZ85 OKSC dd/mm/rrrr hh:mm T2m FF10 DD10 NB NBh NBm NBl /09/ : /09/ : /09/ : /09/ : ……… 04/09/ : /09/ : /09/ : /09/ : comment: T2m..... Temperature 2 m above ground [°C] FF Wind speed v 10 m [m/s] DD Wind direction v 10 metrech [stupne] NB Total cloudiness [%] NBh..... High level cloudiness [%] NBm..... Medium level cloudiness [%] NBl..... Low level cloudiness [%] Advanced parameters FXCZ62 OPIN na na na RÁNO ODPOLEDNE RÁNO ODPOLEDNE RÁNO ODPOLEDNE MĚSTO POC RR% TEP POC RR% TEP DD FF TP POC RR% TEP POC RR% TEP DD FF Praha M 0 13 Z SV 3 23 Z O V 4 Kladno Z SV O V 4 Mladá Boleslav O SV O 0 24 V 4 Příbram ZD SV OD V 4 Kolín Z SV P V 4 Nymburk Z SV P 0 25 V 4 Benešov Z SV OD V 3 Beroun Z SV Z V 4

Storm forecast parameters Tabular forecasts Předpověď na den ALA D LME B ECMCGFSALADLMEBECMCGFSALADLMEBECMCGFSALADLMEBECMCGFSALADLMEBECMCGFSALADLMEBECMCGFS labilita MLCAPE (J/kg) MUCAPE (J/kg) LI (K) (-4)- 2 (-8)- 0 (-6)-0(-4)-0(-5)-1(-8)-0(-5)-(-1)(-6)-(-2)(-6)-0(-8)-0(-6)-1(-6)-(-2)(-5)-1(-8)-(-1)(-5)-0(-6)-(-3)(-6)-1(-8)-(-2)(-5)-(-1)(-5)-(-3)(-7)-2(-8)-0(-6)-(-1)(-4)-(-1) SI (K) (-2)- 3 (-5)- 4 (-3)-1(-2)-2(-3)-4(-4)-4(-2)-2(-2)-1(-3)-4(-4)-3(-3)-3(-3)-1(-2)-4(-5)-3(-2)-3(-3)-0(-3)-5(-4)-2(-3)-3(-2)-1(-2)-5(-4)-3(-2)-2(-2)-1 gradT hPa (K/km) CIN (J/kg) střih větru Střih 0-6 km (m/s) Střih 0-3 km (m/s) Střih 0-1 km (m/s) SWEAT prostře dí Nízkohladinov ý jet-850 hPa (m/s) Jet stream- 250 hPa (m/s) Směšovací poměr (g/kg) Relativní vlhkost hPa (%) --- Srážková voda (mm)

Mobile application Meteor Suitable for smartphones and other Andriod equipment Officially supported by CHMI Forecasted parameters: temperature, humidity, pressure, wind, precipitation… Actual meteogram based on position of user FREE, cca 9700 users, work only in CZ area

Aladin vs other NWP model vs human forecaster Simple verification method, comparable with method used for verification human made forecasts Statistic period: 01/2013 – 06/2014 At most forecasted parameter is forecaster still better, than any NWP model…

Thank you! ALADIN Forecasters meeting (Ankara, Turkey; SEPTEMBER 2014) Tomas Mejstrik