Wisconsin Administrative Code
Department of Natural Resources
NR 200-299 - Environmental Protection - Wisconsin Pollutant Discharge Elimination System
Chapter NR 205 - General Provisions
Section NR 205.05 - Rainfall events
The design rainfall amount and probable intensity of 10-year and 25-year, 24-hour rainfall events for locations in Wisconsin shall be determined from the data in table 1, or for a particular location such determination may be made on the basis of more recent rainfall probability data verified by a government agency and approved by the department for this purpose.
Table 1
Probable 24-Hour Rainfall Events, in inches of rain, for counties in Wisconsin
|
10-year |
25-year |
10-year |
25-year |
10-year |
25-year |
|||
|
Adams |
4.1 |
4.7 |
Iowa |
4.3 |
4.9 |
Polk |
4.1 |
4.7 |
|
Ashland |
3.9 |
4.3 |
Iron |
3.8 |
4.3 |
Portage |
4.0 |
4.5 |
|
Barron |
4.1 |
4.6 |
Jackson |
4.2 |
4.8 |
Price |
4.0 |
4.4 |
|
Bayfield |
3.9 |
4.4 |
Jefferson |
4.0 |
4.6 |
Racine |
4.0 |
4.6 |
|
Brown |
3.7 |
4.3 |
Juneau |
4.1 |
4.7 |
Richland |
4.3 |
4.9 |
|
Buffalo |
4.3 |
4.8 |
Kenosha |
4.0 |
4.6 |
Rock |
4.1 |
4.7 |
|
Burnett |
4.0 |
4.6 |
Kewaunee |
3.7 |
4.2 |
Rusk |
4.1 |
4.6 |
|
Calumet |
3.8 |
4.4 |
LaCrosse |
4.3 |
4.9 |
St. Croix |
4.2 |
4.7 |
|
Chippewa |
4.1 |
4.7 |
Lafayette |
4.3 |
4.9 |
Sauk |
4.2 |
4.8 |
|
Clark |
4.1 |
4.7 |
Langlade |
3.8 |
4.3 |
Sawyer |
4.0 |
4.5 |
|
Columbia |
4.1 |
4.7 |
Lincoln |
3.9 |
4.4 |
Shawano |
3.8 |
4.4 |
|
Crawford |
4.3 |
5.0 |
Manitowoc |
3.8 |
4.3 |
Sheboygan |
3.8 |
4.4 |
|
Dane |
4.2 |
4.8 |
Marathon |
4.0 |
4.5 |
Taylor |
4.1 |
4.6 |
|
Dodge |
4.0 |
4.6 |
Marinette |
3.6 |
4.1 |
Trempealeau |
4.3 |
4.8 |
|
Door |
3.6 |
4.1 |
Marquette |
4.1 |
4.6 |
Vernon |
4.3 |
4.9 |
|
Douglas |
3.9 |
4.4 |
Menominee |
3.7 |
4.3 |
Vilas |
3.8 |
4.3 |
|
Dunn |
4.2 |
4.7 |
Milwaukee |
3.9 |
4.5 |
Walworth |
4.1 |
4.6 |
|
Eau Claire |
4.2 |
4.7 |
Monroe |
4.2 |
4.8 |
Washburn |
4.0 |
4.5 |
|
Florence |
3.6 |
4.1 |
Oconto |
3.7 |
4.2 |
Washington |
3.9 |
4.5 |
|
Fond du Lac |
3.9 |
4.5 |
Oneida |
3.8 |
4.3 |
Waukesha |
4.0 |
4.6 |
|
Forest |
3.7 |
4.2 |
Outagamie |
3.8 |
4.4 |
Waupaca |
3.9 |
4.5 |
|
Grant |
4.3 |
5.0 |
Ozaukee |
3.9 |
4.4 |
Waushara |
4.0 |
4.6 |
|
Green |
4.2 |
4.8 |
Pepin |
4.3 |
4.8 |
Winnebago |
3.9 |
4.5 |
|
Green Lake |
4.0 |
4.6 |
Pierce |
4.2 |
4.8 |
Wood |
4.1 |
4.6 |
The data of table 1 were obtained by extrapolation from maps published by the National Weather Service in Technical Paper No. 40, "Rainfall Frequency Atlas of the United States".
