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{{alert|Precipitation frequency information is being updated by the National Oceanograpic and Atmospheris Administration (NOAA). The Minnesota Stormwater Manual will eventually be updated using Atlas 14 information.|alert-info}}
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{{alert|Precipitation frequency information (Atlas 14) has been updated by the National Oceanic and Atmospheric Administration (NOAA). We recommend using Atlas 14.|alert-info}}
  
{{alert|This page provides the following information on rainfall frequency distributions for Minnesota:|alert-info}}
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NOAA's Atlas 14, Volume 8 precipitation frequency information can be found on [https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_map_cont.html?bkmrk=mn NOAA's precipitation frequency data server]. Rainfall frequency maps from [http://www.nws.noaa.gov/oh/hdsc/PF_documents/TechnicalPaper_No40.pdf Technical Paper 40] have been moved to [[Technical Paper 40 rainfall frequency maps|this page]]. Although we recommend going to the NOAA site for rainfall information, we've provided rainfall frequency plots for several locations in Minnesota. To see a comparison of Atlas 14 and TP-40, [http://stormwater.pca.state.mn.us/index.php/File:Atlas_14_and_TP_40_comparison.png link here]. For additional information on Atlas 14 and comparisons with TP-40, see the following pages.
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*[http://www.ceam.org/vertical/Sites/%7BD96B0887-4D81-47D5-AA86-9D2FB8BC0796%7D/uploads/8SessionRainfallAtlas.pdf Rainfall Atlas 14: Replacement of Technical Paper 40]
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*[http://www.nws.noaa.gov/oh/hdsc/FAQ.html Frequently Asked Questions about Atlas 14]
  
*Rainfall frequency curves for the 1, 2, 5, 10, 25, 50, and 100 year 24-hour rainfall events for Minnesota. The source of the data is Technical Paper 40 ([http://www.nws.noaa.gov/oh/hdsc/PF_documents/TechnicalPaper_No40.pdf National Oceanic and Atmospheric Administration])
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To see information on frequency-volume relationships, see [http://stormwater.pca.state.mn.us/index.php/Rainfall_volume-frequency_maps this page] or [http://stormwater.pca.state.mn.us/images/a/a8/Issue_paper_B_-_precipitation_frequency_analysis_and_use.pdf Issue Paper B].
*Rainfall frequency and volume percentiles as a function of precipitation depth for ten locations in Minnesota. Rainfall frequency specifies the number of 24-hour rain events, expressed as a percent of all events, that are less than a certain depth. Volume represents the total annual volume of rain that is associated with a particular rain depth. For example, 88 percent of rain events in Cloquet are 1 inch or less, while rain events of one inch or less account for 60 percent of the annual volume.
 
  
{{alert|To view the title of an image hold the mouse over the image. To view the image click on the image. Most views show higher resolution depictions of the image.|alert-info}}
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[[file:Atlas 14 MSP airport.png|400px|left|thumb|alt=MSP airport Atlas 14 graphs|<font size=3>'''Minneapolis-St. Paul International Airport'''</font size>]]
  
[[File:1 year 24 hour rainfall.jpg|300 px|alt=map showing 1-year 24-hour rainfall distribution across Minnesota|map showing 1-year 24-hour rainfall distribution across Minnesota]]
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[[file:Atlas 14 Rochester airport.png|400px|right|thumb|alt=Rochester airport Atlas 14 graphs|<font size=3>'''Rochester International Airport'''</font size>]]
[[File:2 year 24 hour rainfall.jpg|300 px|alt=map showing 2-year 24-hour rainfall distribution across Minnesota|map showing 1-year 24-hour rainfall distribution across Minnesota]]
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[[File:5 year 24 hour rainfall.jpg|300 px|alt=map showing 5-year 24-hour rainfall distribution across Minnesota|map showing 1-year 24-hour rainfall distribution across Minnesota]]
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[[file:Atlas 14 Marshall.png|400px|left|thumb|alt=Marshall Atlas 14 graphs|<font size=3>'''Marshall'''</font size>]]
[[File:10 year 24 hour rainfall.jpg|300 px|alt=map showing 10-year 24-hour rainfall distribution across Minnesota|map showing 1-year 24-hour rainfall distribution across Minnesota]]
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[[File:25 year 24 hour rainfall.jpg|300 px|alt=map showing 25-year 24-hour rainfall distribution across Minnesota|map showing 1-year 24-hour rainfall distribution across Minnesota]]
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[[file:Atlas 14 Morris.png|400px|right|thumb|alt=Morris Atlas 14 graphs|<font size=3>'''Morris'''</font size>]]
[[File:50 year 24 hour rainfall.jpg|300 px|alt=map showing 50-year 24-hour rainfall distribution across Minnesota|map showing 1-year 24-hour rainfall distribution across Minnesota]]
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[[File:100 year 24 hour rainfall.jpg|300 px|alt=map showing 100-year 24-hour rainfall distribution across Minnesota|map showing 1-year 24-hour rainfall distribution across Minnesota]]
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[[file:Atlas 14 Crookston.png|400px|left|thumb|alt=Crookston Atlas 14 graphs|<font size=3>'''Crookston'''</font size>]]
[[File:Cloquet rainfall frequencies.png|500px|alt=map showing rainfall frequency and volume percentiles as a function of precipitation depth for Cloquet|Map showing rainfall frequency and volume percentiles as a function of precipitation depth for Cloquet]]
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[[File:Fargo rainfall frequencies.png|500px|alt=map showing rainfall frequency and volume percentiles as a function of precipitation depth for Fargo|Map showing rainfall frequency and volume percentiles as a function of precipitation depth for Fargo]]
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[[file:Atlas 14 International Falls.png|400px|right|thumb|alt=International Falls Atlas 14 graphs|<font size=3>'''International Falls'''</font size>]]
[[File:Grand Forks rainfall frequencies.png|500px|alt=map showing rainfall frequency and volume percentiles as a function of precipitation depth for Grand Forks|Map showing rainfall frequency and volume percentiles as a function of precipitation depth for Grand Forks]]
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[[File:Grand Marais rainfall frequencies.png|500px|alt=map showing rainfall frequency and volume percentiles as a function of precipitation depth for Grand Marais|Map showing rainfall frequency and volume percentiles as a function of precipitation depth for Grand Marais]]
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[[file:Atlas 14 Duluth.png|400px|left|thumb|alt=Duluth Atlas 14 graphs|<font size=3>'''Duluth'''</font size>]]
[[File:Itasca rainfall frequencies.png|500px|alt=map showing rainfall frequency and volume percentiles as a function of precipitation depth for Itasca|Map showing rainfall frequency and volume percentiles as a function of precipitation depth for Itasca]]
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[[File:Lamberton rainfall frequencies.png|500px|alt=map showing rainfall frequency and volume percentiles as a function of precipitation depth for Lamberton|Map showing rainfall frequency and volume percentiles as a function of precipitation depth for Lamberton]]
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[[file:Atlas 14 Grand Marais.png|400px|right|thumb|alt=Grand Marais Atlas 14 graphs|<font size=3>'''Grand Marais'''</font size>]]
[[File:Minneapolis St. Paul rainfall frequencies.png|500px|alt=map showing rainfall frequency and volume percentiles as a function of precipitation depth for Minneapolis and St. Paul|Map showing rainfall frequency and volume percentiles as a function of precipitation depth for Minneapolis and St. Paul]]
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[[File:Rochester rainfall frequencies.png|500px|alt=map showing rainfall frequency and volume percentiles as a function of precipitation depth for Rochester|Map showing rainfall frequency and volume percentiles as a function of precipitation depth for Rochester]]
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[[file:Atlas 14 Brainerd.png|400px|left|thumb|alt=Brainerd Atlas 14 graphs|<font size=3>'''Brainerd'''</font size>]]
[[File:St. Cloud rainfall frequencies.png|500px|alt=map showing rainfall frequency and volume percentiles as a function of precipitation depth for St. Cloud|Map showing rainfall frequency and volume percentiles as a function of precipitation depth for St. Cloud]]
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[[File:Thief River Falls rainfall frequencies.png|500px|alt=map showing rainfall frequency and volume percentiles as a function of precipitation depth for Thief River Falls|Map showing rainfall frequency and volume percentiles as a function of precipitation depth for Thief River Falls]]
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[[file:Atlas 14 St Cloud.png|400px|right|thumb|alt=St. Cloud Atlas 14 graphs|<font size=3>'''St. Cloud'''</font size>]]
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<noinclude>
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[[category:maps]]
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</noinclude>

Revision as of 20:33, 4 March 2022

Information: Precipitation frequency information (Atlas 14) has been updated by the National Oceanic and Atmospheric Administration (NOAA). We recommend using Atlas 14.

NOAA's Atlas 14, Volume 8 precipitation frequency information can be found on NOAA's precipitation frequency data server. Rainfall frequency maps from Technical Paper 40 have been moved to this page. Although we recommend going to the NOAA site for rainfall information, we've provided rainfall frequency plots for several locations in Minnesota. To see a comparison of Atlas 14 and TP-40, link here. For additional information on Atlas 14 and comparisons with TP-40, see the following pages.

To see information on frequency-volume relationships, see this page or Issue Paper B.

MSP airport Atlas 14 graphs
Minneapolis-St. Paul International Airport
Rochester airport Atlas 14 graphs
Rochester International Airport
Marshall Atlas 14 graphs
Marshall
Morris Atlas 14 graphs
Morris
Crookston Atlas 14 graphs
Crookston
International Falls Atlas 14 graphs
International Falls
Duluth Atlas 14 graphs
Duluth
Grand Marais Atlas 14 graphs
Grand Marais
Brainerd Atlas 14 graphs
Brainerd
St. Cloud Atlas 14 graphs
St. Cloud