ICEWARN – ROAD WEATHER FORECASTING FOR PRAGUE CITY

0497878 - ÚFA 2019 RIV US eng C - Conference Paper (international conference)
Zacharov, Petr, jr. - Bližňák, Vojtěch - Pešice, Petr - Pop, Lukáš - Sedlák, Pavel - Sokol, Zbyněk
ICEWARN – ROAD WEATHER FORECASTING FOR PRAGUE CITY.
Proceedings of the 19th SIRWEC conference. Washington: AASHTO, 2018.
[SIRWEC2018 Internation Road Weather Conference /19./. Smolenice (SK), 29.05.2018-01.06.2018]
Grant - others:OP-PPR(CZ)(CZ) CZ.07.1.02/0.0/0.0/16_023/0000117
Program: Operační program Praha - pól růstu ČR
Institutional support: RVO:68378289
Keywords : road weather forecasting * temperature forecast * precipitation forecast * radiation forecast * road weather station * ICEWARN project
OECD category: Meteorology and atmospheric sciences
http://develop.sirwec.org/wp-content/uploads/Papers/2018-Smolenice/P2.pdf

The Institute of Atmospheric Physics (IAP) CAS, Prague, and the Czech Hydrometeorological Institute (CHMI)
have developed and currently run FORTE model for Road Surface Temperature (RST) and Road Surface
Condition (RSC) forecasts within the ICEWARN project. The goal of the project is to develop a method for a
linearly continuous forecast of RST and RSC in Prague city. The model stems from the METRo model (METRo,
Crevier and Delage, 2001) and is based on solving the energy balance and heat conduction equations. The
FORTE model differs mainly in detailed check of input data (i.e., data quality control) and that radiation
fluxes are calculated taking into account shadowing of direct sun radiation by obstacles along the roads. In
addition, the model is run every hour in nowcasting mode, when a potential risk on roads is expected. The
model uses measured data from road weather stations (RWS), and forecasts of the numerical weather
prediction (NWP) model ALADIN as inputs to prepare temperature, radiation and precipitation forecasts
(Sokol et al., 2014, 2017). The model utilizes detailed topography, such as parameters of buildings, woods
and orography, which can influence direct solar radiation.

The forecasting system ICEWARN enabling a 1‐h linear forecast of the RST and RSC has been successfully
developed for Prague city roads and its operational run is planned in the near future. The next step is
implementation and assessment of the impact of sky‐view factor.
Permanent Link: http://hdl.handle.net/11104/0290345