Rainfall Frequency Atlas of the Eastern United States 
for Duration from 30 minutes to 24 hours and 
Return Periods from 1 to 100 years -
maps of ME and NH only

30 Minute Rainfall

• One Year 30 Minute Rainfall (inches)
• Two Year 30 Minute Rainfall (inches)
• Five Year 30 Minute Rainfall (inches)
• Ten Year 30 Minute Rainfall (inches)
• Twenty Five Year 30 Minute Rainfall (inches)
• Fifty Year 30 Minute Rainfall (inches)
• One Hundred Year 30 Minute Rainfall (inches)

1 Hour Rainfall

• One Year 1 Hour Rainfall (inches)
• Two Year 1 Hour Rainfall (inches)
• Five Year 1 Hour Rainfall (inches)
• Ten Year 1 Hour Rainfall (inches)
• Twenty Five Year 1 Hour Rainfall (inches)
• Fifty Year 1 Hour Rainfall (inches)
• One Hundred Year 1 Hour Rainfall (inches)

2 Hour Rainfall

• One Year 2 Hour Rainfall (inches)
• Two Year 2 Hour Rainfall (inches)
• Five Year 2 Hour Rainfall (inches)
• Ten Year 2 Hour Rainfall (inches)
• Twenty Five Year 2 Hour Rainfall (inches)
• Fifty Year 2 Hour Rainfall (inches)
• One Hundred Year 2 Hour Rainfall (inches)

3 Hour Rainfall

• One Year 3 Hour Rainfall (inches)
• Two Year 3 Hour Rainfall (inches)
• Five Year 3 Hour Rainfall (inches)
• Ten Year 3 Hour Rainfall (inches)
• Twenty Five Year 3 Hour Rainfall (inches)
• Fifty Year 3 Hour Rainfall (inches)
• One Hundred Year 3 Hour Rainfall (inches)
   

6 Hour Rainfall

• One Year 6 Hour Rainfall (inches)
• Two Year 6 Hour Rainfall (inches)
• Five Year 6 Hour Rainfall (inches)
• Ten Year 6 Hour Rainfall (inches)
• Twenty Five Year 6 Hour Rainfall (inches)
• Fifty Year 6 Hour Rainfall (inches)
• One Hundred Year 6 Hour Rainfall (inches)
   

12 Hour Rainfall

• One Year 12 Hour Rainfall (inches)
• Two Year 12 Hour Rainfall (inches)
• Five Year 12 Hour Rainfall (inches)
• Ten Year 12 Hour Rainfall (inches)
• Twenty Five Year 12 Hour Rainfall (inches)
• Fifty Year 12 Hour Rainfall (inches)
• One Hundred Year 12 Hour Rainfall (inches)

24 Hour Rainfall

• One Year 24 Hour Rainfall (inches)
• Two Year 24 Hour Rainfall (inches)
• Five Year 24 Hour Rainfall (inches)
• Ten Year 24 Hour Rainfall (inches)
• Twenty Five Year 24 Hour Rainfall (inches)
• Fifty Year 24 Hour Rainfall (inches)
• One Hundred Year 24 Hour Rainfall (inches)

Probable Max 6 hour rainfall (inches)
Ratio of Probable Maximum 6 Hour Rainfall to 100 Year 6 Hour Rainfall (inches)

NOAA Precipitation Frequency Data Server

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