Rainfall Frequency for Indiana
Design Storms
1 Hour or Less
- 5 minute-2 year
- 5 minute-100 year
- 15 minute-2 year
- 15 minute-100 year
- 1 hour-2 year
- 1 hour-100 year
- Intermediate durations and Return periods
2 Hour
3 Hour
6 Hour
12 Hour
24 Hour
2 Day
4 Day
7 Day
10 Day
Probably Maximum Precipitation
Storm Distrubutions
SCS (NRCS) Rainfall
- P100+0.06 (PMP-P100)
- P100+0.12 (PMP-P100)
- P100+0.26 (PMP-P100)
- P100+0.40 (PMP-P100)
- SCS Quick Return Flow
Design Distributions
- Soil Conservation Service Type B storm distribution
- Soil Conservation Service Type II storm distribution
- Batesville, Indiana distribution
- East St. Louis, Illinois distribution
- Paris, Illinois distribution
Bulletin 71 Rainfall Depths
- Huff climatic regions for Indiana
- Sections 1 and 2
- Sections 3 and 4
- Sections 5 and 6
- Sections 7 and 8
- Section 9
- Median time distributions of heavy storm rainfall at a point
- Median time distributions of heavy storm rainfall on areas of 10 to 50 sq. miles
- Median time distributions of heavy storm rainfall on areas of 50 to 100 sq. miles
Miscellaneous
The material on this site is an outgrowth of several previous manuals prepared by Division of Water staff. It includes information on precipitation amounts, adjustment, and distribution for heavy storms. The expanded isohyets are the result of linear interpolation and do not indicate increased accuracy from the source documents.
Questions concerning the information contained here should be directed to:
Engineering Services Center
Indiana Department of Natural Resources
Division of Water
402 W. Washington Street, Rm. W264
Indianapolis, IN 46204
Telephone: (317) 232-4160
Toll free: (877) 928-3755
Fax: (317) 233-4579
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