SW4220301_Design Calculations_20220606

1/6/22, 4:22 PM Precipitation Frequency Data Server
NOAA Atlas 14, Volume 2, Version 3
Location name: Rural Hall, North Carolina, USA*
Latitude: 36.221*, Longitude:-80.2565*
Elevation: 824.02 fr*
p
'source: ESRI Maps
+
"source: USGS
POINT PRECIPITATION FREQUENCY ESTIMATES
G.M. Bonnin, D. Martin, B. Lin, T Parrybok, M.Yekta, and D. Riley
NOAA, National Weather Servioe, Silver Spring, Maryland
PF tabular I PF graphical I Maps 8r aerials
PF tabular
PDS-based point precipitation frequency estimates with 90% confidence intervals (in inches/hour)'
Average recurrence interval (years)
Duration
1 2 5 25 50 100 1200 500 1000
��� 10 ����
5-min
IF
4. 944.82
4. 85875
5.74 8?77
6.3267a46
6.98-68429
7. 2 8.87
7. 9 9340
8. 2 9689
8.455 0.5
8. Ba 0.9
4.98
6.08
10-min
3,27 3.85
3. 04 60
469-5.42
5. 65097
5.57 6.61
5.90 7g06
6. 98 A7
6.44-78.84
6. 8 8529
6.83 8958
15-min
2.73 3621
3.27 3486
3.87 4057
4. 6-5..03
4. 0-5.58
4.985a96
5.226.29
5.41 6460
5.61 6495
5. 1-7.18
2.03
2.45
2.98
3.36
3.81
4.13
4.43
4.70
5.04
5.28
30-min
(1 .87-2.20)
(2.26-2.66)
(2.753.25)
(3.09-3.65)
(3.48-4.13)
(3.75-4.49)
( 4.004.82)
(4.21-5.13)
(4.46-5.53)
(4.63-5.81)
1.26
1.53
1.91
2.19
2.54
2.80
3.05
3.30
3.62
3.85
BO-min
(1.17-1.37)
(1.42-1.67)
(1.76-2.08)
(2.01-2.37)
(2.32-2.75)
(2.54-3.04)
(2.753.32)
(2.96-3.60)
(3.20-3.97)
(3.384.24)
0.748
0.909
1.14
1.32
1.55
1.73
1.91
2.09
2.34
2.52
2-hr IF
(0.688-0.815)
(0.836-0.992)
(1.051.25)
1 (1.21-1.44)
1 (1.41-1.69) 11
(1.56-1.89) 11
(1.71-2.09) 11
(1.86-2.29)
(2.04-2.57)
(2.18-2.78)
0.536
0.653
0.822
0.950
1.12
1.25
1.38
1.52
1.70
1.84
3-hr IF
(0.494-0.586)
(0.603-0.714)
(0.757-0.896)
(0.870-1.03)
1 (1.02-1.22) 11
(1.13-1.36) 11
(1.24-1.51) 11
(1.35-1.66)
1 (1.49-1.86)
1 (1.59-2.02)
0.331
0.402
0.505
0.585
0.695
0.783
0.873
0.966
1.10
1.20
B-hr IF
(0.305-0.362)
(0.371-0.440)
(0.464-0.552)
(0.536-0.638)
(0.632-0.757)
(0.705-0.852)
(0.780-0.950)
(0.852-1.05)
(0.949-1.20)
( 1.02-1.31)
0.199
0.241
0.304
0.353
0.423
0.480
0.540
0.604
0.693
0.766
12-hr
(0.183-0.217)
(0.222-0.263)
(0.279-0.331)
(0.323-0.385)
(0.384-0.460)
(0.432-0.520)
(0.481-0.85)
(0.530-0.653)
(0.598-0.752)
1 (0.649-0.831)
0.120
0.145
0.182
0.212
0.254
0.288
0.324
0.363
0.417
0.461
24-hr
(0.111-0.130)
(0.134-0.157)
(0.168-0.197)
(0.195-0.229)
(0.233-0.274)
(0.263-0.312)
(0.295-0.350)
(0.327-0.392)
(0.372-0.451)
(0.409-0.500)
0.070
0.084
0.105
0.122
0.145
0.163
0.182
0.201
0.229
0.251
2-day
(0.065-0.075)
(0.079-0.091)
(0.98-0.113)
(0.113-0.131)
(0.134-0.155)
(0.150-0.175)
(0.16".196)
(0.184-0.217)
(0.207-0.248)
1 (0.2250.273)
0.050
0.060
0.074
0.086
0.102
0.114
0.128
0.142
0.161
0.177
3-day
(0.046-0.053)
(0.056-0.064)
(0.069-0.080)
(0.080-0.092)
(0.094-0.109)
(0.106-0.123)
(0.117-0.137)
(0.129-0.152)
(0.146-0.174)
(0.159-0.191)
4-day
0.037--0.042
0.044-0 051
0.055-0 063
0.063-0 072
0.074-0 086
0.083-0.097
0.093-0108
0.102-0.1120
0.1115-0 137
0.125-0.1151
7-day
0024-0 027
0029-0 033
0035-0 040
0.0400 046
0047--0 054
0052-0060
00 8-0.67
0063-0 074
0007 0 084
00777--0 092
10-day
00019-0 022
0023-0 026
0028-0 031
0031--0 035
0036-0 041
00 0-0046
0044-0051
0048-0 056
0054-0 063
0058-0 069
20-day
015-0
018-0
00013-0 015
0. 017
0. 020
0021--0 023
0024-0 027
00 6-0029
00 8-0032
0031--0 035
0034-0039
0036-0.042
01-0
013-0
015-0
30-day
0 012
0. 014
0. 016
0.001 0 018
0.001 0 020
00 0-0022
0021-0024
0023-0 026
0025-0 028
0026-0 030
012-0
45-day
0009-0 010
00011-0 012
0. 013
0.001 0 015
0.001 0 017
00 6-0018
00�7-0019
00018-0 020
0020-0 022
0021-0 023
010-0
017--0
BO-day
. 08-0 009
0. 010
0001100 012
0001 0 013
0001 0 014
0014-0 015
00 5-0 01 B
L.01 B-0 017
0. 17--0 018
0. 019
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 NOAA Atlas 14 document for more information.
Back to Top
PF graphical
https://hdsc.nws.noaa.gov/hdsctpfds/pfds_printpage.html?lat=36.2210&Ion=-80.2565&data=intensity&units=english&series=pds 1/3

1/6/22, 4:22 PM
Precipitation Frequency Data Server
PDS-based intensity -duration -frequency (IDF) curves
Latitude: 36.2210", Longitude:-30.2565"
10.000
1-000
41
C
d
c
0-100
O
a
� 0-010
a
tririrlU
7. 7. 7.
1+ 7.
7. 7. 7. 7.
C
G
G
N �] L
-a�
N
m
N
N
A �
N A
f: 4
� �-(F
N
Duration
10-000
1-000
ZI
c
a
c
0-100
0
a
v, 0-010
a
0-001
i i i i i i i i
2 5 10 25 50 100 200 500
Average recurrence interval (years)
NOAA Atlas 14, Volume 2, Version 3 Created {GMT}: Thu Jan 6 21-22:36 2022
Back to Top
Maps & aerials
Small scale terrain
Rural Hall•
I BA ..
MOUNT-
_
stanleyville
3km -
rniami -
Large scale terrain
Average recurrence
interval
(years)
2
— b
— 70
25
50
100
— 200
500
1000
Duration
— 5inrn
— 2-day
— 1o+nm
— 3-0ay
15Kmn
— 4-day
— 30-min
— 7-day
— 04mm
— 1 a -day
— 24ir
— 20-day
— 3fir
— 30"
— 0-nr
— 45-day
— 12a'rr
— 244v
— 50-day
https://hdsc.nws.noaa.gov/hdsctpfds/pfds_printpage.html?lat=36.221 O&Ion=-80.2565&data=intensity&units=english&series=pds 2/3

1/6/22, 4:22 PM
Precipitation Frequency Data Server
., Lynchburg "%
" Black sb urg Roanoke
ti
1
R
Bristol
1) '
Winston-5 '"F
❑urhanx
Greensboro
t•
I•rtt� Mitchell
h
4 sh eville
NORTH CAROLINA
100km
larlo tte
Fayetteville
Omi
Large scale map
Lynchburg
n
Blacksburg ..Roanoke
t "FL— '
•Jch nson City ' f
inston am Greensboro
a ❑urham
Z�
h
�sheyllle:� North
® Caroling _
100km aliotte
Fayetteville
Greerrvirfe
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/hdsctpfds/pfds_printpage.html?lat=36.2210&Ion=-80.2565&data=intensity&units=english&series=pds 3/3