SW3240203_Design Calculations_20240522 (6)

5/22/24,5:26 PM Precipitation Frequency Data Server
NOAA Atlas 14,Volume 2,Version 3
Location name: Monroe, North Carolina, USA*
Latitude: 34.8263°, Longitude: -80.423° none
Elevation:602 ft**
*source:ESRI Maps "�*
d'4"°� source:USGS "`"„
POINT PRECIPITATION FREQUENCY ESTIMATES
G.M.Bonnin,D.Martin,B.Lin,T.Parzybok,M.Yekta,and D.Riley
NOAA,National Weather Service,Silver Spring,Maryland
PF_tabular I PF graphical I Maps & aerials
https://hdsc.nws.noaa.gov/pfds/pfds_printpage.html?lat=34.8263&Ion=-80.4230&data=intensity&units=english&series=pds 1/5

5/22/24,5:26 PM Precipitation Frequency Data Server
PF tabular
PDS-based point precipitation frequency estimates with 90% confidence intervals (in inches/hour)1
Average recurrence interval(years)
Duration
1 2 5 10 25 50 100 200 500 1000
5.23 6.19 7.18 7.90 8.74 9.31 9.85 10.3 10.9 11.3
5-min
(4.82-5.69) (5.69-6.74) (6.59-7.81) (7.24-8.58) t (7.97-9.47) (8.46-10.1) (8.90-10.7) (9.29-11.2) (9.71-11.9) I (9.98-12.3)
4.18 4.95 5.75 6.32 6.96 7.42 7.82 8.19 8.62 8.90
10-min (3.85-4.54) (4.55-5.39) (5.27-6.26) (5.78-6.86) (6.35-7.55) (6.73-8.04) (7.07-8.48) (7.36-8.89) (7.67-9.38) (7.87-9.71)
3.48 4.15 4.85 5.33 1 5.88 6.26 6.60 6.89 7.23 7.45
1 5-min (3.21-3.79) (3.81-4.52) (4.44-5.28) (4.88-5.79) (5.36-6.38) (5.68-6.79) (5.96-7.15) (6.19-7.48) (6.44-7.87) (6.58-8.12)
2.39 2.87 3.44 3.86 4.36 4.71 5.05 5.36 5.75 6.03
30-min (2.20-2.60) (2.63-3.12) (3.16-3.75) (3.53-4.19) (3.97-4.72) (4.28-5.11) (4.56-5.47) (4.82-5.82) (5.12-6.26) (5.33-6.58)
1.49 1.80 2.21 2.51 2.90 3.19 3.48 3.76 4.13 4.40
60-min (1.37-1.62) (1.65-1.96) (2.02-2.40) (2.30-2.73) (2.64-3.14) (2.90-3.46) (3.14-3.77) (3.38-4.08) (3.68-4.49) 1 (3.89-4.80)
0.855 1.04 1.28 1.47 1.72 1.91 2.10 2.28 2.53 2.72
2-hr (0.784-0.934) (0.948-1.13) (1.17-1.40) (1.34-1.61) (1.56-1.87) (1.72-2.08) (1.88-2.28) (2.04-2.48) (2.24-2.76) 1 (2.38-2.97)
3-hr 0.603 0.729 0.910 1.05 1.24 1.39 1.55 1.70 1.92 2.10
(0.551-0.664) (0.666-0.802) (0.830-1.00) (0.956-1.15) (1.12-1.36) (1.25-1.52) (1.38-1.68) (1.51-1.86) (1.68-2.10) (1.81-2.29)
6-hr 0.360 0.434 0.543 0.628 0.745 0.838 0.934 1.03 1.17 1.28
(0.329-0.396) (0.397-0.477) (0.496-0.596) (0.572-0.689) (0.674-0.814) (0.753-0.913) (0.833-1.02) (0.913-1.12) (1.02-1.27) (1.10-1.39)
12-hr 0.210 0.254 0.318 0.370 0.442 0.501 0.561 0.625 0.715 I 0.788
(0.192-0.230) (0.232-0.279) (0.291-0.349) (0.337-0.406) (0.400-0.483) (0.449-0.546) (0.499-0.612) (0.550-0.681) (0.619-0.779) (0.673-0.859)
24-hr 0.123 0.149 0.188 0.221 0.269 0.309 0.353 0.402 0.473 0.535
(0.112-0.136) (0.135-0.165) (0.170-0.208) (0.199-0.244) (0.241-0.297) (0.275-0.342) (0.312-0.392) (0.353-0.448) (0.410-0.529) (0.457-0.601)
2-day 0.072 0.087 1 0.109 0.128 0.155 0.178 ] 0.203 0.230 0.271 0.305
(0.066-0.080) (0.079-0.096) (0.099-0.121) (0.116-0.142) (0.140-0.172) (0.159-0.197)i(0.181-0.225) (0.203-0.257) (0.235-0.304) (0.261-0.345)
0.051 0.061 0.077 0.089 0.108 0.123 0.140 0.158 0.186 0.209
3-day (0.047-0.056) (0.056-0.068) (0.070-0.084) (0.081-0.098) (0.098-0.119) (0.111-0.136) (0.125-0.155) (0.140-0.175) (0.162-0.207) (0.180-0.234)
4-day 0.040 0.049 0.060 0.070 0.084 0.096 0.108 0.122 0.143 0.161
(0.037-0.044) (0.045-0.053) (0.055-0.066) (0.064-0.077) (0.077-0.092) (0.087-0.105) (0.097-0.119) (0.109-0.135) (0.126-0.158) (0.140-0.179)
7-day 0.027 0.032 0.039 0.045 0.053 0.060 0.067 0.075 0.087 0.097
(0.025-0.029) (0.029-0.035) (0.036-0.042) (0.041-0.049) (0.049-0.058) (0.055-0.065) (0.061-0.073) (0.068-0.082) (0.078-0.096) (0.086-0.108)
10-day 0.021 0.025 0.031 0.035 0.041 0.046 0.051 0.056 0.064 0.071
(0.020-0.023) (0.024-0.027) (0.029-0.033) (0.033-0.038) (0.038-0.044) (0.042-0.050) (0.047-0.055) (0.051-0.061) (0.058-0.070) (0.063-0.077)
20-day 0.014 0.017 0.020 0.023 0.026 0.029 0.032 0.035 0.039 0.042
(0.013-0.015) (0.016-0.018) (0.019-0.021) (0.021-0.024) (0.024-0.028) (0.027-0.031) (0.029-0.034) (0.032-0.037) (0.036-0.042) (0.038-0.046)
30-day 0.011 0.014 0.016 0.018 0.020 0.022 0.024 0.026 0.028 0.030
(0.011-0.012) (0.013-0.014) (0.015-0.017) (0.017-0.019) (0.019-0.022) (0.021-0.024) (0.022-0.026) (0.024-0.028) (0.026-0.030) (0.028-0.033)
45-day 0.010 0.011 0.013 0.014 0.016 0.018 0.019 0.020 0.022 0.023
(0.009-0.010) (0.011-0.012) (0.012-0.014) (0.014-0.015) (0.015-0.017) (0.017-0.019) (0.018-0.020) (0.019-0.021) (0.021-0.023) (0.022-0.025)
60-day 0.008 0.010 0.011 0.013 0.014 0.015 0.016 0.017 0.019 0.020
(0.008-0.009) (0.010-0.010) (0.011-0.012) (0.012-0.013) (0.013-0.015) (0.014-0.016) (0.015-0.017) (0.016-0.018)1(0.017-0.020) (0.018-0.021)
1 Precipitation frequency(PF)estimates in this table are based on frequency analysis of partial duration series(PDS).
Numbers in parenthesis are PF estimates at lower and upper bounds of the 90%confidence interval.The probability that precipitation frequency estimates(for
a given duration and average recurrence interval)will be greater than the upper bound(or less than the lower bound)is 5%.Estimates at upper bounds are not
checked against probable maximum precipitation(PMP)estimates and may be higher than currently valid PMP values.
Please refer to NOAAAtlas 14 document for more information.
Back to Top
PF graphical
https://hdsc.nws.noaa.gov/pfds/pfds_printpage.html?lat=34.8263&Ion=-80.4230&data=intensity&units=english&series=pds 2/5

5/22/24,5:26 PM Precipitation Frequency Data Server
PDS-based intensity-duration-frequency (IDF) curves
Latitude: 34.8263°, Longitude: -80.4230°
101 Average recurrence
interval
`\ (years)
10° — — 2
.` — 5
— 25
110.1W
\\ — 50
_ — 500
— 1000
10-2 •
c_ c_ c_ c_ c_ - - '- 6 6- >, >,>, >, >, �. >. >,>,
E E E E E ri ny th N v v vv 7 v v v 77
r-1 N p
0 - M Duration N M v l0
101 -
L
•
Duration
10°
— 5-min — 2-day
a
— 10-min — 3-day
15-min — 4-day
10-1 - — 30 min — 7-day
a — 60-min — 10-day
— 2-hr — 20-day
cu
a — 3-hr — 30-day
— 6-hr — 45-day
10-2 — 12-hr — 50-day
i 24-hr
1 2 5 10 25 50 100 200 500 1000
Average recurrence interval (years)
NOAA Atlas 14,Volume 2,Version 3 Created(GMT):Wed May 22 21:26:39 2024
Back to Top
Maps & aerials
Small scale terrain
https://hdsc.nws.noaa.gov/pfds/pfds_printpage.html?lat=34.8263&Ion=-80.4230&data=intensity&units=english&series=pds 3/5

5/22/24,5:26 PM Precipitation Frequency Data Server
f
SL� LIT + R
3km
2mi
Large scale terrain
• • Durham
Greensboro •
Mt Mitchell R a l ei g
•
•Asheville NORTH CAROLINA
•Charlotte Fayetteville.
•Greenville
SOUTH CAROLINA +•
Imir
100km
60mi IL "1Ba 9
Large scale map
(ireensooro
Durham
Raleigl
Asb II North
Carolina
art oft;
• F ettevilh
\ I o
Greenville )
+
%IA• mbia
100km th
,Ina J/
60mi ti
Large scale aerial
https://hdsc.nws.noaa.gov/pfds/pfds_printpage.html?lat=34.8263&Ion=-80.4230&data=intensity&units=english&series=pds 4/5

5/22/24,5:26 PM Precipitation Frequency Data Server
Greensboro Durham
Raleig
Asheville
• • North
Carolina
Charlotte
Fayettevill
•
Greenville
•
Cdumbi a
100km uth
r - •IIn CI ..
60mi
1Ir9Pk1
Back to Top
US Department of Commerce
National Oceanic and Atmospheric Administration
National Weather Service
National Water Center
1325 East West Highway
Silver Spring,MD 20910
Questions?:[e-mail]
Disclaimer
https://hdsc.nws.noaa.gov/pfds/pfds_printpage.html?lat=34.8263&Ion=-80.4230&data=intensity&units=english&series=pds 5/5