The heavy rains that occurred in south central Kansas on Sept. 8-9 moved in to Northeastern Division on Sept. 14. Hiawatha, in Brown County, had particularly heavy amounts. As reported in the Sept. 12, 2106 issue of the Agronomy eUpdate, the Hydrometerological Design Studies Center, a branch of the National Oceanic and Atmospheric Administration, NOAA Atlas 14, addresses the frequency of rainfall events on time-scales ranging from 5 minutes to 60 days. Not surprisingly, return rates will differ at different parts of the state, as rainfall patterns vary. The 24-hour total of 9.73 inches reported at the Hiawatha COOP station falls in the 200-year return rates. Other stations in the vicinity reported 11 inches. The table below shows the recurrence intervals, with the recent event highlighted:
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POINT PRECIPITATION FREQUENCY (PF) ESTIMATES for Hiawatha 9SE, Kansas |
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WITH 90% CONFIDENCE INTERVALS AND SUPPLEMENTARY INFORMATION |
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NOAA Atlas 14, Volume 8, Version 2 |
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Duration |
Average recurrence interval (years) |
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|
1 |
2 |
5 |
10 |
25 |
50 |
100 |
200 |
500 |
1000 |
|
|
60-min |
1.38 |
1.64 |
2.09 |
2.47 |
3.01 |
3.44 |
3.88 |
4.34 |
4.96 |
5.45 |
|
(1.07‑ 1.79) |
(1.27‑ 2.13) |
(1.60‑ 2.71) |
(1.89‑ 3.22) |
(2.23‑ 4.04) |
(2.49‑ 4.67) |
(2.73‑ 5.37) |
(2.93‑ 6.14) |
(3.23‑ 7.18) |
(3.46‑ 7.97) |
|
|
2-hr |
1.72 |
2.05 |
2.62 |
3.11 |
3.8 |
4.36 |
4.94 |
5.54 |
6.36 |
7.01 |
|
(1.34‑ 2.21) |
(1.60‑ 2.64) |
(2.03‑ 3.37) |
(2.40‑ 4.01) |
(2.85‑ 5.07) |
(3.20‑ 5.87) |
(3.51‑ 6.77) |
(3.78‑ 7.77) |
(4.19‑ 9.13) |
(4.50‑ 10.2) |
|
|
3-hr |
1.92 |
2.29 |
2.93 |
3.49 |
4.29 |
4.94 |
5.62 |
6.33 |
7.32 |
8.1 |
|
(1.50‑ 2.45) |
(1.79‑ 2.93) |
(2.29‑ 3.75) |
(2.71‑ 4.48) |
(3.24‑ 5.70) |
(3.65‑ 6.62) |
(4.02‑ 7.68) |
(4.36‑ 8.84) |
(4.85‑ 10.4) |
(5.23‑ 11.7) |
|
|
6-hr |
2.25 |
2.68 |
3.42 |
4.08 |
5.04 |
5.83 |
6.66 |
7.54 |
8.77 |
9.76 |
|
(1.78‑ 2.84) |
(2.12‑ 3.38) |
(2.69‑ 4.33) |
(3.19‑ 5.17) |
(3.85‑ 6.63) |
(4.35‑ 7.74) |
(4.81‑ 9.02) |
(5.24‑ 10.4) |
(5.88‑ 12.4) |
(6.37‑ 13.9) |
|
|
12-hr |
2.58 |
3.03 |
3.83 |
4.55 |
5.61 |
6.5 |
7.44 |
8.44 |
9.86 |
11 |
|
(2.06‑ 3.21) |
(2.42‑ 3.78) |
(3.05‑ 4.79) |
(3.60‑ 5.71) |
(4.34‑ 7.33) |
(4.90‑ 8.55) |
(5.43 9.98) |
(5.94‑ 11.6) |
(6.68‑ 13.8) |
(7.25‑ 15.5) |
|
|
24-hr |
2.92 |
3.4 |
4.24 |
5 |
6.14 |
7.08 |
8.09 |
9.18 |
10.7 |
11.9 |
|
(2.36‑ 3.60) |
(2.74‑ 4.20) |
(3.41‑ 5.25) |
(4.00‑ 6.21) |
(4.80‑ 7.93) |
(5.40‑ 9.23) |
(5.98‑ 10.8) |
(6.52‑ 12.5) |
(7.33‑ 14.9) |
(7.95‑ 16.7) |
|
|
2-day |
3.33 |
3.85 |
4.76 |
5.57 |
6.77 |
7.76 |
8.81 |
9.93 |
11.5 |
12.8 |
|
(2.71‑ 4.06) |
(3.13‑ 4.70) |
(3.86‑ 5.82) |
(4.50‑ 6.84) |
(5.34‑ 8.63) |
(5.97‑ 9.98) |
(6.57‑ 11.6) |
(7.12‑ 13.3) |
(7.96‑ 15.8) |
(8.59‑ 17.7) |
|
|
3-day |
3.65 |
4.2 |
5.15 |
6 |
7.23 |
8.24 |
9.3 |
10.4 |
12 |
13.3 |
|
(2.99‑ 4.42) |
(3.44‑ 5.09) |
(4.20‑ 6.26) |
(4.87‑ 7.31) |
(5.73‑ 9.14) |
(6.38‑ 10.5) |
(6.97‑ 12.1) |
(7.53‑ 13.9) |
(8.36‑ 16.4) |
(8.98‑ 18.3) |
|
|
4-day |
3.93 |
4.5 |
5.49 |
6.35 |
7.61 |
8.63 |
9.71 |
10.8 |
12.4 |
13.7 |
|
(3.23‑ 4.74) |
(3.70‑ 5.43) |
(4.49‑ 6.63) |
(5.17‑ 7.71) |
(6.05‑ 9.56) |
(6.70‑ 11.0) |
(7.30‑ 12.6) |
(7.85‑ 14.4) |
(8.68‑ 16.9) |
(9.30‑ 18.7) |
|
|
7-day |
4.67 |
5.29 |
6.34 |
7.26 |
8.59 |
9.66 |
10.8 |
12 |
13.6 |
14.9 |
|
(3.88‑ 5.58) |
(4.38‑ 6.32) |
(5.24‑ 7.60) |
(5.96‑ 8.73) |
(6.87‑ 10.7) |
(7.56‑ 12.1) |
(8.17‑ 13.8) |
(8.73‑ 15.7) |
(9.57‑ 18.3) |
(10.2‑ 20.2) |
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The full atlas, with access to other locations, can be found online at http://www.nws.noaa.gov/oh/hdsc/index.html
Additional precipitation maps for Kansas can be found on the Kansas Climate website at: http://climate.k-state.edu/
Mary Knapp
mknapp@ksu.edu
Christopher Redmond
christopherredmond@ksu.edu
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