Heads up: There are no amended sections in this chapter.

This appendix is informative and is not part of the code.

User note:

About this appendix: The design of storm water drainage systems (Chapter 11) requires determination of the design rainfall event for the geographic location of the building. Appendix B provides a list of major cities in the U.S. along with the 1-hour duration, 100-year occurrence rainfall rate.

Rainfall rates, in inches per hour, are based on a storm of 1-hour duration and a 100-year return period. The rainfall rates shown in the appendix are derived from Figure 1106.1.

Alabama:  
Birmingham 3.8
Huntsville 3.6
Mobile 4.6
Montgomery 4.2
Alaska:  
Fairbanks 1.0
Juneau 0.6
Arizona:  
Flagstaff 2.4
Nogales 3.1
Phoenix 2.5
Yuma 1.6
Arkansas:  
Fort Smith 3.6
Little Rock 3.7
Texarkana 3.8
California:  
Barstow 1.4
Crescent City 1.5
Fresno 1.1
Los Angeles 2.1
Needles 1.6
Placerville 1.5
San Fernando 2.3
San Francisco 1.5
Yreka 1.4
Colorado:  
Craig 1.5
Denver 2.4
Durango 1.8
Grand Junction 1.7
Lamar 3.0
Pueblo 2.5
Connecticut:  
Hartford 2.7
New Haven 2.8
Putnam 2.6
Delaware:  
Georgetown 3.0
Wilmington 3.1
District of Columbia:  
Washington 3.2
Florida:  
Jacksonville 4.3
Key West 4.3
Miami 4.7
Pensacola 4.6
Tampa 4.5
Georgia:  
Atlanta 3.7
Dalton 3.4
Macon 3.9
Savannah 4.3
Thomasville 4.3
Hawaii:  
Hilo..... 6.2
Honolulu 3.0
Wailuku 3.0
Idaho:  
Boise 0.9
Lewiston 1.1
Pocatello 1.2
Illinois:  
Cairo 3.3
Chicago 3.0
Peoria 3.3
Rockford 3.2
Springfield 3.3
Indiana:  
Evansville 3.2
Fort Wayne 2.9
Indianapolis 3.1
Iowa:  
Davenport 3.3
Des Moines 3.4
Dubuque 3.3
Sioux City 3.6
Kansas:  
Atwood 3.3
Dodge City 3.3
Topeka 3.7
Wichita 3.7
Kentucky:  
Ashland 3.0
Lexington 3.1
Louisville 3.2
Middlesboro 3.2
Paducah 3.3
Louisiana:  
Alexandria 4.2
Lake Providence 4.0
New Orleans 4.8
Shreveport 3.9
Maine:  
Bangor 2.2
Houlton 2.1
Portland 2.4
Maryland:  
Baltimore 3.2
Hagerstown 2.8
Oakland 2.7
Salisbury 3.1
Massachusetts:  
Boston 2.5
Pittsfield 2.8
Worcester 2.7
Michigan:  
Alpena 2.5
Detroit 2.7
Grand Rapids 2.6
Lansing 2.8
Marquette 2.4
Sault Ste. Marie 2.2
Minnesota:  
Duluth 2.8
Grand Marais 2.3
Minneapolis 3.1
Moorhead 3.2
Worthington 3.5
Mississippi:  
Biloxi 4.7
Columbus 3.9
Corinth 3.6
Natchez 4.4
Vicksburg 4.1
Missouri:  
Columbia 3.2
Kansas City 3.6
Springfield 3.4
St. Louis 3.2
Montana:  
Ekalaka 2.5
Havre 1.6
Helena 1.5
Kalispell 1.2
Missoula 1.3
Nebraska:  
North Platte 3.3
Omaha 3.8
Scottsbluff 3.1
Valentine 3.2
Nevada:  
Elko 1.0
Ely 1.1
Las Vegas 1.4
Reno 1.1
New Hampshire:  
Berlin 2.5
Concord 2.5
Keene 2.4
New Jersey:  
Atlantic City 2.9
Newark. 3.1
Trenton 3.1
New Mexico:  
Albuquerque 2.0
Hobbs 3.0
Raton 2.5
Roswell 2.6
Silver City 1.9
New York:  
Albany 2.5
Binghamton 2.3
Buffalo 2.3
Kingston 2.7
New York 3.0
Rochester 2.2
North Carolina:  
Asheville 4.1
Charlotte 3.7
Greensboro 3.4
Wilmington 4.2
North Dakota:  
Bismarck 2.8
Devils Lake 2.9
Fargo 3.1
Williston 2.6
Ohio:  
Cincinnati 2.9
Cleveland 2.6
Columbus 2.8
Toledo 2.8
Oklahoma:  
Altus 3.7
Boise City 3.3
Durant 3.8
Oklahoma City 3.8
Oregon:  
Baker 0.9
Coos Bay 1.5
Eugene 1.3
Portland 1.2
Pennsylvania:  
Erie 2.6
Harrisburg 2.8
Philadelphia 3.1
Pittsburgh 2.6
Scranton 2.7
Rhode Island:  
Block Island 2.75
Providence 2.6
South Carolina:  
Charleston 4.3
Columbia 4.0
Greenville 4.1
South Dakota:  
Buffalo 2.8
Huron 3.3
Pierre 3.1
Rapid City 2.9
Yankton 3.6
Tennessee:  
Chattanooga 3.5
Knoxville 3.2
Memphis 3.7
Nashville 3.3
Texas:  
Abilene 3.6
Amarillo 3.5
Brownsville 4.5
Dallas 4.0
Del Rio 4.0
El Paso 2.3
Houston 4.6
Lubbock 3.3
Odessa 3.2
Pecos 3.0
San Antonio 4.2
Utah:  
Brigham City 1.2
Roosevelt 1.3
Salt Lake City 1.3
St. George 1.7
Vermont:  
Barre 2.3
Bratteboro 2.7
Burlington 2.1
Rutland 2.5
Virginia:  
Bristol 2.7
Charlottesville 2.8
Lynchburg 3.2
Norfolk 3.4
Richmond 3.3
Washington:  
Omak 1.1
Port Angeles 1.1
Seattle 1.4
Spokane 1.0
Yakima 1.1
West Virginia:  
Charleston 2.8
Morgantown 2.7
Wisconsin:  
Ashland 2.5
Eau Claire 2.9
Green Bay 2.6
La Crosse 3.1
Madison 3.0
Milwaukee 3.0
Wyoming:  
Cheyenne 2.2
Fort Bridger 1.3
Lander 1.5
New Castle 2.5
Sheridan 1.7
Yellowstone Park 1.4
UpCodes Premium
Leverage the most sophisticated code compliance platform.
TRY FREE FOR TWO WEEKS VISIT PRICING