Waccamaw River at Longs
Future / Actual / Minor
OWP 2.0 WWA Modal Title
01/11/2021, 10:04 PM UTC through 01/11/2021, 10:04 PM UTC
Sender
Sent
- Warning: no valid ratings curve available. Transformations to and from FEET/CFS/KCFS will not happen.
Traces and Thresholds Click to turn on/off display
Observed (OBS) 04/01/2025 5:00 PM EDTRecord: 20.2 ftCATEGORY STAGE Major Flooding 17 ft Moderate Flooding 15 ft Minor Flooding 12 ft Action 11 ft Reliability of the Forecast: Based on current and forecast river, weather and reservoir conditions
NOTE: Forecasts are issued as needed during times of high water, but are not routinely available.
River forecasts for this location take into account past precipitation and the precipitation amounts expected approximately 48 hours into the future from the forecast issuance time.
National Water Model Hydrograph
Official NWS streamflow forecasts are produced by NWS hydrologic forecasters for river gauge locations using hydrologic models which are calibrated to that location. This process considers additional guidance and information, including local expertise and experience, to produce the best forecast possible. The NWM output provides supplemental guidance to NWS forecasters and should not be considered an official NWS river forecast.
Flood Impacts
- 20 - Extensive flooding. Numerous roads flooded and areas isolated by flooding. HWY 9 near longs and multiple spots on HWY 905 may be impassable. Flooding along Vera LN and Star Bluff RD expands to Pint CIR and areas near the North Myrtle Beach Drag Strip. Several buildings between HWY 905 and HWY 90 and HWY 57 may be flooded or isolated.In NC,River RD in Pireway inaccessible. HWY 905 S of Pireway and other spots on Ash-Little River RD flood. Parts of Brunswick Plantation on Caw Caw Swamp will flood.
- 19 - Extensive flooding. Many roads flooded and areas isolated by flooding. Hwy 905 between McNeil Chapel RD and Parker RD impassable. HWY 9 near Longs and HWY 905 at Buck Creek flooded. Flooding expands along Vera LN and Star Bluff RD. Several roads in Aberdeen flooded. Rolling River RD,Loop CIR, Dusty LN,and Thomas RD near Huston RD will flood. In NC,River RD in Pireway inaccessible. HWY 905 S of Pireway and other spots on Ash-Little River RD flood. Parts of Brunswick Plantation on Caw Caw Swamp may flood.
- 18 - Extensive flooding. Many roads flooded and areas isolated by flooding. Hwy 905 between McNeil Chapel RD and Parker RD may be impassable. Flooding expands along Vera LN and Star Bluff RD. Several roads in Aberdeen will be flooded or begin to flood. Rolling River RD will flood. Loop CIR, Dusty LN,and Thomas RD near Huston RD may flood. HWY 9 near Longs and HWY 905 near Buck Creek will flood. In NC,River RD in Pireway is inaccessible. HWY 905 south of Pireway and multiple spots of Ash-Little River RD flood.
Gauge Info
Coordinates | 33.9125, -78.7153 |
RFC | SERFC |
State | SC |
WFO | ILM |
County | Horry |
Data Provider(s) | |
US Geological Survey | USGS--Water Resources of the United States |
USGS | 02110500 |
Gauge Location
Recent Crests
1. | 12.35 ft | on 09-25-2024 |
2. | 14.66 ft | on 08-15-2024 |
3. | 12.22 ft | on 12-28-2023 |
4. | 13.24 ft | on 09-06-2023 |
5. | 8.79 ft | on 01-25-2022 |
Recent Crests
1. | 12.35 ft | on 09-25-2024 |
2. | 14.66 ft | on 08-15-2024 |
3. | 12.22 ft | on 12-28-2023 |
4. | 13.24 ft | on 09-06-2023 |
5. | 8.79 ft | on 01-25-2022 |
6. | 14.34 ft | on 02-23-2021 |
7. | 10.84 ft | on 02-08-2021 |
8. | 10.56 ft | on 02-02-2021 |
9. | 12.03 ft | on 01-09-2021 |
10. | 12.08 ft | on 11-21-2020 |
11. | 10.98 ft | on 09-19-2020 |
12. | 11.42 ft | on 08-16-2020 |
13. | 11.48 ft | on 06-26-2020 |
14. | 13.24 ft | on 06-02-2020 |
15. | 11.44 ft | on 03-06-2020 |
16. | 11.70 ft | on 02-21-2020 |
17. | 11.67 ft | on 02-15-2020 |
18. | 10.86 ft | on 09-08-2019 |
19. | 12.00 ft | on 12-21-2018 |
20. | 20.19 ft | on 09-22-2018 |
21. | 10.83 ft | on 08-05-2018 |
22. | 10.64 ft | on 06-02-2018 |
23. | 11.45 ft | on 09-13-2017 |
24. | 11.81 ft | on 08-25-2017 |
25. | 16.95 ft | on 10-14-2016 |
26. | 11.42 ft | on 09-15-2016 |
27. | 13.42 ft | on 02-13-2016 |
28. | 11.52 ft | on 01-05-2016 |
29. | 11.86 ft | on 11-11-2015 |
30. | 15.17 ft | on 10-06-2015 |
31. | 9.79 ft | on 05-14-2015 |
32. | 10.79 ft | on 03-08-2015 |
33. | 10.53 ft | on 01-25-2015 |
34. | 10.66 ft | on 01-13-2015 |
35. | 11.30 ft | on 08-12-2014 |
36. | 13.43 ft | on 07-09-2013 |
37. | 9.17 ft | on 06-07-2012 |
38. | 10.59 ft | on 02-12-2011 |
39. | 11.31 ft | on 02-07-2010 |
40. | 11.14 ft | on 01-06-2010 |
41. | 10.72 ft | on 12-20-2009 |
42. | 9.75 ft | on 04-19-2008 |
43. | 12.18 ft | on 01-02-2007 |
44. | 11.76 ft | on 12-02-2006 |
45. | 12.03 ft | on 09-07-2006 |
46. | 10.70 ft | on 01-08-2006 |
47. | 12.15 ft | on 10-13-2005 |
48. | 9.05 ft | on 09-19-2005 |
49. | 11.59 ft | on 09-13-2004 |
50. | 11.68 ft | on 09-04-2004 |
51. | 12.02 ft | on 08-21-2004 |
52. | 10.90 ft | on 02-28-2004 |
53. | 10.54 ft | on 08-08-2003 |
54. | 10.57 ft | on 07-26-2003 |
55. | 12.06 ft | on 04-12-2003 |
56. | 12.25 ft | on 03-23-2003 |
57. | 8.15 ft | on 03-15-2002 |
58. | 11.23 ft | on 03-30-2001 |
59. | 12.65 ft | on 09-26-2000 |
60. | 11.12 ft | on 03-28-2000 |
61. | 11.79 ft | on 02-06-2000 |
62. | 14.49 ft | on 10-25-1999 |
63. | 17.94 ft | on 09-23-1999 |
64. | 13.49 ft | on 05-08-1999 |
65. | 12.46 ft | on 02-02-1999 |
66. | 11.70 ft | on 09-10-1998 |
67. | 11.68 ft | on 03-21-1998 |
68. | 13.68 ft | on 02-19-1998 |
69. | 13.82 ft | on 02-09-1998 |
70. | 12.29 ft | on 01-29-1998 |
71. | 12.06 ft | on 01-25-1998 |
72. | 11.48 ft | on 01-14-1998 |
73. | 10.87 ft | on 02-23-1997 |
74. | 12.64 ft | on 10-17-1996 |
75. | 14.95 ft | on 09-15-1996 |
76. | 10.68 ft | on 04-08-1996 |
77. | 10.89 ft | on 11-02-1995 |
78. | 11.11 ft | on 10-22-1995 |
79. | 9.70 ft | on 10-13-1995 |
80. | 11.83 ft | on 02-25-1995 |
81. | 11.50 ft | on 02-19-1995 |
82. | 12.46 ft | on 01-21-1995 |
83. | 11.96 ft | on 12-29-1994 |
84. | 10.82 ft | on 10-23-1994 |
85. | 11.18 ft | on 03-09-1994 |
86. | 10.90 ft | on 04-17-1993 |
87. | 13.63 ft | on 01-14-1993 |
88. | 13.03 ft | on 08-23-1992 |
89. | 11.05 ft | on 06-01-1992 |
90. | 11.11 ft | on 09-02-1991 |
91. | 10.93 ft | on 08-25-1991 |
92. | 11.73 ft | on 02-01-1991 |
93. | 10.62 ft | on 01-09-1990 |
94. | 10.79 ft | on 12-23-1989 |
95. | 12.01 ft | on 10-04-1989 |
96. | 10.79 ft | on 04-27-1989 |
97. | 10.12 ft | on 01-26-1988 |
98. | 11.04 ft | on 09-15-1987 |
99. | 12.75 ft | on 03-09-1987 |
100. | 12.41 ft | on 01-30-1987 |
101. | 11.23 ft | on 01-03-1987 |
102. | 9.93 ft | on 08-27-1986 |
103. | 11.31 ft | on 02-21-1985 |
104. | 11.50 ft | on 04-05-1984 |
105. | 11.40 ft | on 03-07-1984 |
106. | 14.40 ft | on 03-27-1983 |
107. | 12.25 ft | on 03-08-1983 |
108. | 12.30 ft | on 03-02-1983 |
109. | 12.70 ft | on 02-24-1983 |
110. | 11.10 ft | on 01-08-1983 |
111. | 11.35 ft | on 06-29-1982 |
112. | 11.93 ft | on 02-22-1982 |
113. | 11.85 ft | on 01-11-1982 |
114. | 14.87 ft | on 08-23-1981 |
115. | 11.70 ft | on 04-08-1980 |
116. | 12.24 ft | on 03-24-1980 |
117. | 12.72 ft | on 09-16-1979 |
118. | 12.35 ft | on 03-15-1979 |
119. | 11.15 ft | on 05-18-1978 |
120. | 11.92 ft | on 01-28-1978 |
121. | 12.00 ft | on 11-17-1977 |
122. | 10.95 ft | on 03-14-1977 |
123. | 11.54 ft | on 07-13-1976 |
124. | 11.30 ft | on 02-25-1975 |
125. | 12.01 ft | on 08-26-1974 |
126. | 12.80 ft | on 04-12-1973 |
127. | 13.10 ft | on 02-20-1973 |
128. | 12.19 ft | on 02-14-1972 |
129. | 12.85 ft | on 03-12-1971 |
130. | 11.96 ft | on 03-31-1970 |
131. | 13.26 ft | on 08-13-1969 |
132. | 11.05 ft | on 06-26-1969 |
133. | 10.42 ft | on 01-21-1968 |
134. | 11.73 ft | on 08-20-1967 |
135. | 12.64 ft | on 03-10-1966 |
136. | 11.55 ft | on 04-01-1965 |
137. | 11.40 ft | on 02-27-1965 |
138. | 12.09 ft | on 10-17-1964 |
139. | 12.02 ft | on 03-05-1964 |
140. | 11.00 ft | on 01-26-1964 |
141. | 11.90 ft | on 02-01-1963 |
142. | 11.11 ft | on 03-17-1962 |
143. | 13.94 ft | on 07-06-1961 |
144. | 12.95 ft | on 04-18-1961 |
145. | 11.70 ft | on 09-17-1960 |
146. | 13.52 ft | on 08-04-1960 |
147. | 11.60 ft | on 04-02-1960 |
148. | 12.00 ft | on 03-09-1960 |
149. | 13.40 ft | on 03-13-1959 |
150. | 12.46 ft | on 04-18-1958 |
151. | 10.38 ft | on 03-15-1957 |
152. | 9.89 ft | on 02-19-1956 |
153. | 13.82 ft | on 09-29-1955 |
154. | 12.55 ft | on 09-12-1955 |
155. | 10.00 ft | on 04-11-1954 |
156. | 11.50 ft | on 03-15-1953 |
157. | 10.05 ft | on 04-02-1952 |
158. | 9.41 ft | on 04-25-1951 |
159. | 11.22 ft | on 07-15-1950 |
Historic Crests
1. | 20.19 ft | on 09-22-2018 |
2. | 17.94 ft | on 09-23-1999 |
3. | 16.95 ft | on 10-14-2016 |
4. | 15.17 ft | on 10-06-2015 |
5. | 14.95 ft | on 09-15-1996 |
Historic Crests
1. | 20.19 ft | on 09-22-2018 |
2. | 17.94 ft | on 09-23-1999 |
3. | 16.95 ft | on 10-14-2016 |
4. | 15.17 ft | on 10-06-2015 |
5. | 14.95 ft | on 09-15-1996 |
6. | 14.87 ft | on 08-23-1981 |
7. | 14.66 ft | on 08-15-2024 |
8. | 14.49 ft | on 10-25-1999 |
9. | 14.40 ft | on 03-27-1983 |
10. | 14.34 ft | on 02-23-2021 |
11. | 13.94 ft | on 07-06-1961 |
12. | 13.82 ft | on 09-29-1955 |
13. | 13.82 ft | on 02-09-1998 |
14. | 13.68 ft | on 02-19-1998 |
15. | 13.63 ft | on 01-14-1993 |
16. | 13.52 ft | on 08-04-1960 |
17. | 13.49 ft | on 05-08-1999 |
18. | 13.43 ft | on 07-09-2013 |
19. | 13.42 ft | on 02-13-2016 |
20. | 13.40 ft | on 03-13-1959 |
21. | 13.26 ft | on 08-13-1969 |
22. | 13.24 ft | on 09-06-2023 |
23. | 13.24 ft | on 06-02-2020 |
24. | 13.10 ft | on 02-20-1973 |
25. | 13.03 ft | on 08-23-1992 |
26. | 12.95 ft | on 04-18-1961 |
27. | 12.85 ft | on 03-12-1971 |
28. | 12.80 ft | on 04-12-1973 |
29. | 12.75 ft | on 03-09-1987 |
30. | 12.72 ft | on 09-16-1979 |
31. | 12.70 ft | on 02-24-1983 |
32. | 12.65 ft | on 09-26-2000 |
33. | 12.64 ft | on 10-17-1996 |
34. | 12.64 ft | on 03-10-1966 |
35. | 12.55 ft | on 09-12-1955 |
36. | 12.46 ft | on 02-02-1999 |
37. | 12.46 ft | on 04-18-1958 |
38. | 12.46 ft | on 01-21-1995 |
39. | 12.41 ft | on 01-30-1987 |
40. | 12.35 ft | on 03-15-1979 |
41. | 12.35 ft | on 09-25-2024 |
42. | 12.30 ft | on 03-02-1983 |
43. | 12.29 ft | on 01-29-1998 |
44. | 12.25 ft | on 03-08-1983 |
45. | 12.25 ft | on 03-23-2003 |
46. | 12.24 ft | on 03-24-1980 |
47. | 12.22 ft | on 12-28-2023 |
48. | 12.19 ft | on 02-14-1972 |
49. | 12.18 ft | on 01-02-2007 |
50. | 12.15 ft | on 10-13-2005 |
51. | 12.09 ft | on 10-17-1964 |
52. | 12.08 ft | on 11-21-2020 |
53. | 12.06 ft | on 04-12-2003 |
54. | 12.06 ft | on 01-25-1998 |
55. | 12.03 ft | on 01-09-2021 |
56. | 12.03 ft | on 09-07-2006 |
57. | 12.02 ft | on 03-05-1964 |
58. | 12.02 ft | on 08-21-2004 |
59. | 12.01 ft | on 10-04-1989 |
60. | 12.01 ft | on 08-26-1974 |
61. | 12.00 ft | on 12-21-2018 |
62. | 12.00 ft | on 03-09-1960 |
63. | 12.00 ft | on 11-17-1977 |
64. | 11.96 ft | on 12-29-1994 |
65. | 11.96 ft | on 03-31-1970 |
66. | 11.93 ft | on 02-22-1982 |
67. | 11.92 ft | on 01-28-1978 |
68. | 11.90 ft | on 02-01-1963 |
69. | 11.86 ft | on 11-11-2015 |
70. | 11.85 ft | on 01-11-1982 |
71. | 11.83 ft | on 02-25-1995 |
72. | 11.81 ft | on 08-25-2017 |
73. | 11.79 ft | on 02-06-2000 |
74. | 11.76 ft | on 12-02-2006 |
75. | 11.73 ft | on 08-20-1967 |
76. | 11.73 ft | on 02-01-1991 |
77. | 11.70 ft | on 02-21-2020 |
78. | 11.70 ft | on 04-08-1980 |
79. | 11.70 ft | on 09-10-1998 |
80. | 11.70 ft | on 09-17-1960 |
81. | 11.68 ft | on 03-21-1998 |
82. | 11.68 ft | on 09-04-2004 |
83. | 11.67 ft | on 02-15-2020 |
84. | 11.60 ft | on 04-02-1960 |
85. | 11.59 ft | on 09-13-2004 |
86. | 11.55 ft | on 04-01-1965 |
87. | 11.54 ft | on 07-13-1976 |
88. | 11.52 ft | on 01-05-2016 |
89. | 11.50 ft | on 04-05-1984 |
90. | 11.50 ft | on 03-15-1953 |
91. | 11.50 ft | on 02-19-1995 |
92. | 11.48 ft | on 01-14-1998 |
93. | 11.48 ft | on 06-26-2020 |
94. | 11.45 ft | on 09-13-2017 |
95. | 11.44 ft | on 03-06-2020 |
96. | 11.42 ft | on 09-15-2016 |
97. | 11.42 ft | on 08-16-2020 |
98. | 11.40 ft | on 03-07-1984 |
99. | 11.40 ft | on 02-27-1965 |
100. | 11.35 ft | on 06-29-1982 |
101. | 11.31 ft | on 02-07-2010 |
102. | 11.31 ft | on 02-21-1985 |
103. | 11.30 ft | on 02-25-1975 |
104. | 11.30 ft | on 08-12-2014 |
105. | 11.23 ft | on 03-30-2001 |
106. | 11.23 ft | on 01-03-1987 |
107. | 11.22 ft | on 07-15-1950 |
108. | 11.18 ft | on 03-09-1994 |
109. | 11.15 ft | on 05-18-1978 |
110. | 11.14 ft | on 01-06-2010 |
111. | 11.12 ft | on 03-28-2000 |
112. | 11.11 ft | on 09-02-1991 |
113. | 11.11 ft | on 03-17-1962 |
114. | 11.11 ft | on 10-22-1995 |
115. | 11.10 ft | on 01-08-1983 |
116. | 11.05 ft | on 06-01-1992 |
117. | 11.05 ft | on 06-26-1969 |
118. | 11.04 ft | on 09-15-1987 |
119. | 11.00 ft | on 01-26-1964 |
120. | 10.98 ft | on 09-19-2020 |
121. | 10.95 ft | on 03-14-1977 |
122. | 10.93 ft | on 08-25-1991 |
123. | 10.90 ft | on 04-17-1993 |
124. | 10.90 ft | on 02-28-2004 |
125. | 10.89 ft | on 11-02-1995 |
126. | 10.87 ft | on 02-23-1997 |
127. | 10.86 ft | on 09-08-2019 |
128. | 10.84 ft | on 02-08-2021 |
129. | 10.83 ft | on 08-05-2018 |
130. | 10.82 ft | on 10-23-1994 |
131. | 10.79 ft | on 04-27-1989 |
132. | 10.79 ft | on 03-08-2015 |
133. | 10.79 ft | on 12-23-1989 |
134. | 10.72 ft | on 12-20-2009 |
135. | 10.70 ft | on 01-08-2006 |
136. | 10.68 ft | on 04-08-1996 |
137. | 10.66 ft | on 01-13-2015 |
138. | 10.64 ft | on 06-02-2018 |
139. | 10.62 ft | on 01-09-1990 |
140. | 10.59 ft | on 02-12-2011 |
141. | 10.57 ft | on 07-26-2003 |
142. | 10.56 ft | on 02-02-2021 |
143. | 10.54 ft | on 08-08-2003 |
144. | 10.53 ft | on 01-25-2015 |
145. | 10.42 ft | on 01-21-1968 |
146. | 10.38 ft | on 03-15-1957 |
147. | 10.12 ft | on 01-26-1988 |
148. | 10.05 ft | on 04-02-1952 |
149. | 10.00 ft | on 04-11-1954 |
150. | 9.93 ft | on 08-27-1986 |
151. | 9.89 ft | on 02-19-1956 |
152. | 9.79 ft | on 05-14-2015 |
153. | 9.75 ft | on 04-19-2008 |
154. | 9.70 ft | on 10-13-1995 |
155. | 9.41 ft | on 04-25-1951 |
156. | 9.17 ft | on 06-07-2012 |
157. | 9.05 ft | on 09-19-2005 |
158. | 8.79 ft | on 01-25-2022 |
159. | 8.15 ft | on 03-15-2002 |
Low Water Records
1. | 0.25 ft | on 10-22-1983 |
2. | 0.46 ft | on 09-24-2010 |
3. | 0.56 ft | on 06-10-1994 |
4. | 0.57 ft | on 10-10-1990 |
5. | 0.59 ft | on 08-07-1993 |
Low Water Records
1. | 0.25 ft | on 10-22-1983 |
2. | 0.46 ft | on 09-24-2010 |
3. | 0.56 ft | on 06-10-1994 |
4. | 0.57 ft | on 10-10-1990 |
5. | 0.59 ft | on 08-07-1993 |
6. | 0.62 ft | on 09-10-1997 |
7. | 0.62 ft | on 09-18-1980 |
8. | 0.63 ft | on 11-20-1980 |
9. | 0.67 ft | on 11-25-2013 |
10. | 0.71 ft | on 07-17-1985 |
11. | 0.72 ft | on 07-16-1970 |
12. | 0.73 ft | on 07-13-1990 |
13. | 0.75 ft | on 07-11-1988 |
14. | 0.79 ft | on 10-20-1972 |
15. | 0.80 ft | on 07-26-1977 |
16. | 0.85 ft | on 07-06-2004 |
17. | 0.89 ft | on 09-20-1982 |
18. | 0.93 ft | on 12-07-1973 |
19. | 0.94 ft | on 08-06-1987 |
20. | 1.00 ft | on 07-15-1998 |
21. | 1.09 ft | on 06-03-2022 |
22. | 1.11 ft | on 06-02-2021 |
23. | 1.21 ft | on 11-09-1987 |
24. | 1.27 ft | on 06-12-1996 |
Gauge Photos
No Images Found
Probability Information
No Images Available
Unique Local Info
Potential River Levels Used to Estimate the Chance of Flooding and the Range of Possible River Levels |
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10 Day (HEFS) | 10 Day (NAEFS) | 10 Day (GEFS) |
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Note: The official hydrograph at the top of this web page was made by a river forecaster using past rainfall and forecast rainfall for the next 48 hours. The Potential River Level graphics are computer generated and most useful for rain expected beyond 48 hours.
Collaborative Agencies
The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.