Wis. Admin. Code Department of Natural Resources NR 205.05
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 |
Wis. Admin. Code Department of Natural Resources NR 205.05
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".