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Table 3. Maximum expected rainfall (in inches) across the WFO Morristown HSA
| RETURN PERIOD |
| RAIN DURATION |
1 Year |
2 Year |
5 Year |
10 Year |
25 Year |
50 Year |
100 Year |
| 3 Hour |
1.5-2.0 |
1.8-2.5 |
2.3-3.0 |
2.7-3.6 |
3.2-4.0 |
3.4-4.5 |
3.7-5.0 |
| 6 Hour |
1.8-2.8 |
2.2-3.2 |
2.7-4.0 |
3.2-4.8 |
3.7-5.3 |
4.0-5.8 |
4.6-6.8 |
| 12 Hour |
2.2-3.4 |
2.5-3.7 |
3.2-5.2 |
3.7-5.5 |
4.3-6.8 |
4.7-6.8 |
5.4-7.8 |
| 24 Hour |
2.4-3.8 |
2.7-4.7 |
3.7-5.7 |
4.2-7.2 |
4.8-7.8 |
5.5-8.5 |
5.8-9.8 |
Source: 'Rainfall Frequency Atlas of the United States', Technical Paper #40, Weather Bureau, May 1961.
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