Database of design storms in Finland

Design storms can be used for example when planning urban runoff structures or as precipitation data in hydrological models. The database of design storms is based on radar measurements from Finland in 2013–2016 and extreme rain areas derived therefrom. In contrast to commonly used design storms with simple variation patterns in time (e.g. a triangle), the real momentary variations in intensity are shown in these present cases. The database contains heavy precipitation events whose statistical return period is up to three years. The table below shows several examples. The entire numerical data can be downloaded as an Excel file and all the hyetographs as PNG images.

Published: 17.4.2019

 

Save the entire data as an Excel file 

Please select the duration of the accumulation period:

 

Examples of design storms with an accumulation period of 5 minutes. Start time, location (longitude and latitude), total precipitation, duration and return period are stated for each design storm. The momentary rain intensity, interpolated with storm motion into 1-minute intervals can be obtained by downloading the entire material. Clicking on the images of the examples will increase their size.

Save all 5-minute precipitation images as PNG files 

 

Time

[yyyymmddHHMM]

Lon WGS84Lat WGS84

Precipitation

P (mm)

Duration

(min)

Return period

(a)

Image

Y: Precipitation/min, X: Time

20160823144322.860.520.65100
20140717150724.664.49.6550
20140719105428.960.48.9510
20130725143321.962.26.755
20150521160927.464.86.153

 

Examples of design storms with an accumulation period of 15 minutes. Start time, location (longitude and latitude), total precipitation, duration and return period are stated for each design storm. The momentary rain intensity, interpolated with storm motion into 1-minute intervals can be obtained by downloading the entire material. Clicking on the images of the examples will increase their size.

Save all 15-minute precipitation images as PNG files 

 

Time

[yyyymmddHHMM]

Lon WGS84Lat WGS84

Precipitation

P (mm)

Duration

(min)

Return period

(a)

Image

Y: Precipitation/min, X: Time

20130607133524.461.648.415100
20160724122025.364.519.41550
20130801115524.362.716.61510
20150826140026.860.811.4155
20150622121025.367.610.6153

 

Examples of design storms with an accumulation period of 30 minutes. Start time, location (longitude and latitude), total precipitation, duration and return period are stated for each design storm. The momentary rain intensity, interpolated with storm motion into 1-minute intervals can be obtained by downloading the entire material. Clicking on the images of the examples will increase their size.

Save all 30-minute precipitation images as PNG files 

 

Time

[yyyymmddHHMM]

Lon WGS84Lat WGS84

Precipitation

P (mm)

Duration

(min)

Return period

(a)

Image

Y: Precipitation/min, X: Time

20130912150028.261.430.630100
20160728043026.360.626.23050
20140810182024.564.223.03010
20150921075025.560.317.4305
20160814133529.761.313.5303

 

Examples of design storms with an accumulation period of 60 minutes. Start time, location (longitude and latitude), total precipitation, duration and return period are stated for each design storm. The momentary rain intensity, interpolated with storm motion into 1-minute intervals can be obtained by downloading the entire material. Clicking on the images of the examples will increase their size.

Save all 60-minute precipitation images as PNG files 

 

Time

[yyyymmddHHMM]

Lon WGS84Lat WGS84

Precipitation

P (mm)

Duration

(min)

Return period

(a)

Image

Y: Precipitation/min, X: Time

20140525145028.061.993.260100
20160713094529.162.630.46050
20140608155527.661.123.66010
20150906105526.265.419.9605
20130805010524.161.517.9603

 

Examples of design storms with an accumulation period of 3 hours. Start time, location (longitude and latitude), total precipitation, duration and return period are stated for each design storm. The momentary rain intensity, interpolated with storm motion into 1-minute intervals can be obtained by downloading the entire material. Clicking on the images of the examples will increase their size.

Save all 3-hour precipitation images as PNG files 

 

TIme

[yyyymmddHHMM]

Lon WGS84Lat WGS84

Precipitation

P (mm)

Duration

(min)

Return period

(a)

Image

Y: Precipitation/min, X: Time

20130811134522.860.590.9180500
20150725062025.565.249.8180100
20140513212527.062.637.418010
20150711105523.860.031.91805
20160511230022.562.625.81803

 

Examples of design storms with an accumulation period of 6 hours. Start time, location (longitude and latitude), total precipitation, duration and return period are stated for each design storm. The momentary rain intensity, interpolated with storm motion into 1-minute intervals can be obtained by downloading the entire material. Clicking on the images of the examples will increase their size.

Save all 6-hour precipitation images as PNG files 

 

Time

[yyyymmddHHMM]

Lon WGS84Lat WGS84

Precipitation

P (mm)

Duration

(min)

Return period

(a)

Image

Y: Precipitation/min, X: Time

20130811112522.860.592.3360500
20150710091027.463.167.4360100
20140622064022.660.442.536010
20140621003526.362.039.73605
20160920215025.866.534.03603

 

Examples of design storms with an accumulation period of 12 hours. Start time, location (longitude and latitude), total precipitation, duration and return period are stated for each design storm. The momentary rain intensity, interpolated with storm motion into 1-minute intervals can be obtained by downloading the entire material. Clicking on the images of the examples will increase their size.

Save all 12-hour precipitation images as PNG files 

 

Time

[yyyymmddHHMM]

Lon WGS84Lat WGS84

Precipitation

P (mm)

Duration

(min)

Return period

(a)

Image

Y: Precipitation/min, X: Time

20130602072522.262.4120.8720500
20150716091022.660.585.9720100
20160823083522.860.565.272050
20160807012528.662.957.072010
20160812072026.465.841.97203

 

Examples of design storms with an accumulation period of 24 hours. Start time, location (longitude and latitude), total precipitation, duration and return period are stated for each design storm. The momentary rain intensity, interpolated with storm motion into 1-minute intervals can be obtained by downloading the entire material. Clicking on the images of the examples will increase their size.

Save all 24-hour precipitation images as PNG files 

 

Time

[yyyymmddHHMM]

Lon WGS84Lat WGS84

Precipitation

P (mm)

Duration

(min)

Return period

(a)

Image

Y: Precipitation/min, X: Time

20160704010025.162.7119.01440500
20160814051021.762.671.7144010
20150724214025.565.251.914405
20140815131026.760.849.014403
20130920042526.060.447.214403

 

References:

Rimpiläinen, L. 2017. Mitoitussateiden muotokirjasto. Diplomityö. (Selection of radar based designstorms. Master's thesis. Abstract in English.) Aalto-yliopisto, Insinööritieteiden korkeakoulu. Espoo. 49 s. http://urn.fi/URN:NBN:fi:aalto-201704133569

Suomen rakennusinsinöörien liitto RIL. 2004). Vesihuolto II. Suomen rakennusinsinöörien liitto, RIL 124-2-2004, Helsinki. 682 s. ISBN951-758-438-5

Aaltonen, J., Hohti, H., Jylhä, K., Karvonen, T., Kilpeläinen, T., Koistinen, J., Kotro, J., Kuitunen, T., Ollila, M., Parvio, A., Pulkkinen, S., Silander, J., Tiihonen, T., Tuomenvirta, H. & Vajda, A. 2008. Rankkasateet ja taajamatulvat (RATU) (Heavy rains and floods in urban areas. Abstract in English.) Suomen ympäristökeskus SYKE, Helsinki. Suomen ympäristö 31/2008. 123 s. http://hdl.handle.net/10138/38381

 

Authors: The Finnish Meteorological Institute in URCLIM project (Advance on Urban Climate Sercies) which is part of ERA4CS, an ERA-NET initiated by JPI Climate with co-funding of the European Union (Grant n°690462)

More information in Climateguide.fi:

Design rainfall information is used as a risk assessment tool in water management

Precipitation will increase and heavy rain events will intensify

Flood risk management measures can be used to prepare for floods

Precipitation return levels in Finland

Intensity and frequency of short-duration rainfall in Finland (interactive visualizing tool)