Local weather forecast by
"City, ST"
|
Search by city or zip code. Press enter or select the go button to submit request
|
|
|
|
Ohio River Flows during El Niño and La Niña Events
|
|
Interpretation
of the Data
El
Niño and La Niña events play a critical role in autumn through spring flows. El Niño is referred to
as the warming of the equatorial Pacific
Ocean along and east of the
dateline while La Niña is referred to as the cooling of the equatorial Pacific Ocean along and east of the dateline.
The composite El Niño indicates flows along the
entire reach of the Ohio River tend to be below normal while the composite La Niña
indicates flows along the entire reach of the tend to be above normal.
However,
research (Noel, Changnon, 1997) indicates it is not
that helpful to use a composite for El Niño or La Niña unless you are in
specific parts of the country like the
Upper Midwest or
Texas where signs are consistent. It is important to look
at the strength of the event. During weak to moderate El Niño events, flows
tend to be below normal while during strong events flows tend to be above
normal. This opposite effect is also true of La Niña events. During weak to
moderate La Niña events, flow tends to be above normal while during strong
events, flows tend to be below normal.
Therefore,
it is very important to not only know what type of event you are
have, but the magnitude and intensity of that event. Weak to
moderate events in the Pacific
Ocean do not have nearly the
global impact that the strong events have. It makes sense that weather closer
to home play as much or more of a role during the weak to moderate events, such
as the North Atlantic Oscillation (NAO). However, during the strong ENSO
events, they tend to dwarf other weather factors closer to home form autumn to
spring.
Research done by Jim Noel and Ron Curtis. Data entry done by Ron Curtis and
Link Crawford. Web support given by Mark Fenbers.
To get updates on La Niña or El Niño, see the latest NWS/Climate Prediction Center Advisory.*
La Niña Years
Sewickly,
PA
| |
Oct. |
Nov. |
Dec. |
Jan. |
Feb. |
Mar. |
Apr |
Total Flow |
ENSO |
| 1950-51 |
14.6 |
52.0 |
73.9 |
79.5 |
82.4 |
66.7 |
73.7 |
442.8 |
Mod |
| 1954-55 |
51.0 |
21.4 |
46.5 |
45.6 |
56.7 |
99.7 |
36.7 |
357.6 |
Mod |
| 1955-56 |
14.8 |
30.7 |
22.6 |
13.7 |
89.1 |
93.7 |
73.7 |
338.3 |
Mod |
| 1956-57 |
10.2 |
12.5 |
54.9 |
49.9 |
59.8 |
40.3 |
79.8 |
307.4 |
Weak |
| 1961-62 |
6.7 |
21.8 |
29.7 |
40.6 |
37.6 |
72.1 |
69.0 |
277.5 |
Weak |
| 1964-65 |
5.3 |
8.6 |
40.8 |
60.4 |
50.4 |
58.5 |
60.2 |
284.2 |
Weak |
| 1967-68 |
30.5 |
35.4 |
40.8 |
31.3 |
41.7 |
45.4 |
29.0 |
254.1 |
Weak |
| 1970-71 |
25.5 |
48.3 |
60.3 |
42.1 |
64.9 |
68.7 |
28.6 |
338.4 |
Mod |
| 1973-74 |
14.6 |
32.6 |
50.9 |
73.2 |
36.4 |
59.0 |
53.1 |
319.8 |
Strong |
| 1974-75 |
12.5 |
30.2 |
53.9 |
57.3 |
74.9 |
73.0 |
43.8 |
345.6 |
Weak |
| 1975-76 |
32.1 |
25.0 |
42.5 |
50.1 |
78.1 |
52.7 |
27.0 |
307.5 |
Strong |
| 1983-84 |
9.0 |
31.0 |
61.0 |
20.9 |
63.9 |
61.3 |
72.8 |
319.9 |
Weak |
| 1984-85 |
12.9 |
40.0 |
54.9 |
29.2 |
48.0 |
75.7 |
49.0 |
309.7 |
Weak |
| 1988-89 |
11.1 |
32.0 |
26.6 |
41.7 |
56.3 |
59.4 |
61.3 |
288.4 |
Strong |
| 1995-96 |
8.8 |
28.8 |
30.9 |
72.4 |
65.7 |
76.1 |
45.3 |
328.0 |
Weak |
| 1998-99 |
8.0 |
6.1 |
9.4 |
53.9 |
46.3 |
52.9 |
60.7 |
237.3 |
Strong |
| 1999-00 |
8.5 |
18.1 |
32.7 |
25.5 |
52.1 |
40.4 |
64.4 |
241.7 |
Strong |
| 2000-01 |
16.7 |
13.1 |
34.1 |
20.1 |
57.8 |
42.7 |
53.3 |
237.8 |
Weak |
|
|
|
|
|
|
|
|
|
|
|
| ENSO AVG |
16.2 |
27.1 |
42.6 |
44.9 |
59.0 |
63.2 |
54.5 |
307.6 |
|
| AVG |
15.2 |
26.3 |
40.6 |
45.6 |
49.6 |
65.4 |
56.6 |
299.3 |
|
40% chance of above normal flow in strong events, 69% chance in weak to moderate events
El Niño Years
Sewickly,
PA
| |
Oct. |
Nov. |
Dec. |
Jan. |
Feb. |
Mar. |
Apr. |
Total Flow |
ENSO |
| 1957-58 |
5.1 |
8.0 |
46.5 |
28.6 |
22.9 |
49.2 |
60.3 |
220.6 |
Mod |
| 1963-64 |
3.1 |
9.4 |
18.3 |
39.5 |
22.2 |
108.5 |
70.8 |
271.8 |
Mod |
| 1965-66 |
8.2 |
20.5 |
21.4 |
28.0 |
61.1 |
47.4 |
45.4 |
232.0 |
Mod |
| 1968-69 |
7.9 |
26.7 |
41.9 |
40.4 |
41.2 |
18.7 |
53.3 |
230.1 |
Weak |
| 1970-71 |
25.5 |
48.3 |
60.3 |
42.1 |
64.9 |
68.7 |
28.6 |
338.4 |
Weak |
| 1972-73 |
17.2 |
49.7 |
88.9 |
32.6 |
41.7 |
59.5 |
57.3 |
346.9 |
Strong |
| 1976-77 |
39.0 |
23.4 |
26.6 |
10.5 |
33.7 |
77.6 |
50.2 |
261.0 |
Weak |
| 1977-78 |
35.3 |
37.8 |
67.6 |
50.4 |
23.7 |
64.9 |
56.0 |
335.7 |
Weak |
| 1982-83 |
8.2 |
23.6 |
41.6 |
29.9 |
34.0 |
46.4 |
61.8 |
245.5 |
Strong |
| 1986-87 |
29.1 |
48.4 |
62.2 |
31.1 |
25.2 |
33.2 |
74.3 |
303.5 |
Mod |
| 1987-88 |
18.2 |
18.9 |
50.8 |
30.1 |
49.7 |
43.6 |
33.8 |
245.1 |
Mod |
| 1991-92 |
6.4 |
9.3 |
32.5 |
33.8 |
40.0 |
53.8 |
51.1 |
226.9 |
Mod |
| 1994-95 |
13.1 |
27.8 |
44.3 |
43.1 |
29.6 |
43.8 |
29.6 |
231.3 |
Mod |
| 1997-98 |
12.8 |
45.0 |
42.0 |
76.6 |
50.8 |
57.2 |
59.5 |
343.9 |
Strong |
| 2002-03 |
10.2 |
27.1 |
39.9 |
38.2 |
37.0 |
73.4 |
46.7 |
272.5 |
Mod |
| 2004-05 |
17.5 |
31.6 |
57.2 |
102.2 |
50.1 |
|
|
|
Weak |
|
|
|
|
|
|
|
|
|
|
|
| ENSO AVG |
16.1 |
28.5 |
46.4 |
41.1 |
39.2 |
56.4 |
51.9 |
273.7 |
|
| AVG |
15.2 |
26.3 |
40.6 |
45.6 |
49.6 |
65.4 |
56.6 |
299.3 |
|
66% chance of above normal flow in strong events, 33% chance in weak to moderate events
La Niña Years
Huntington, WV
| |
Oct. |
Nov. |
Dec. |
Jan. |
Feb. |
Mar. |
Apr |
Total Flow |
ENSO |
| 1950-51 |
24.5 |
83.8 |
177.4 |
171.4 |
206.3 |
175.0 |
167.4 |
1005.8 |
Mod |
| 1954-55 |
84.8 |
39.3 |
84.0 |
108.6 |
159.0 |
284.1 |
90.7 |
850.5 |
Mod |
| 1955-56 |
21.8 |
47.1 |
36.0 |
26.3 |
219.4 |
229.9 |
169.5 |
750.0 |
Mod |
| 1956-57 |
21.8 |
28.0 |
110.9 |
119.5 |
178.6 |
97.7 |
182.3 |
738.8 |
Weak |
| 1961-62 |
17.9 |
47.8 |
84.5 |
103.0 |
108.6 |
200.3 |
154.2 |
716.3 |
Weak |
| 1964-65 |
16.6 |
21.6 |
78.0 |
138.2 |
123.7 |
155.7 |
165.9 |
699.7 |
Weak |
| 1967-68 |
41.9 |
53.6 |
88.7 |
76.1 |
109.2 |
123.6 |
87.4 |
580.5 |
Weak |
| 1970-71 |
41.1 |
101.0 |
128.9 |
101.5 |
173.5 |
156.6 |
57.7 |
760.3 |
Mod |
| 1973-74 |
26.7 |
86.6 |
118.8 |
193.2 |
97.7 |
157.4 |
140.1 |
820.5 |
Strong |
| 1974-75 |
26.3 |
62.7 |
141.7 |
155.2 |
208.0 |
239.9 |
132.7 |
966.5 |
Weak |
| 1975-76 |
72.4 |
56.5 |
89.2 |
144.7 |
165.1 |
124.7 |
68.4 |
721.0 |
Strong |
| 1983-84 |
28.7 |
70.8 |
131.8 |
55.3 |
128.7 |
148.2 |
181.8 |
745.3 |
Weak |
| 1984-85 |
25.5 |
75.5 |
99.9 |
72.4 |
120.8 |
150.0 |
106.7 |
647.8 |
Weak |
| 1988-89 |
18.5 |
58.5 |
53.2 |
93.6 |
138.0 |
131.3 |
141.3 |
634.4 |
Strong |
| 1995-96 |
25.6 |
61.9 |
70.1 |
185.2 |
143.3 |
180.4 |
106.1 |
772.6 |
Weak |
| 1998-99 |
19.7 |
18.2 |
28.7 |
141.8 |
108.5 |
142.4 |
112.2 |
571.5 |
Strong |
| 1999-00 |
18.6 |
39.0 |
62.5 |
51.5 |
138.3 |
89.0 |
143.0 |
541.9 |
Strong |
| 2000-01 |
28.7 |
26.9 |
65.2 |
48.8 |
113.6 |
92.2 |
108.5 |
483.9 |
Weak |
| |
|
|
|
|
|
|
|
|
|
| ENSO AVG |
31.2 |
54.4 |
91.6 |
104.8 |
146.7 |
159.9 |
128.7 |
722.6 |
|
| AVG |
31.4 |
54.9 |
87.3 |
108.2 |
126.6 |
158.0 |
132.8 |
699.2 |
|
20% chance of above normal flow in strong events, 61% chance in weak to moderate events
El Niño Years
Huntington, WV
| |
Oct. |
Nov. |
Dec. |
Jan. |
Feb. |
Mar. |
Apr. |
Total Flow |
ENSO |
| 1957-58 |
16.3 |
30.8 |
118.7 |
87.7 |
78.3 |
116.2 |
145.6 |
593.6 |
Mod |
| 1963-64 |
6.6 |
15.1 |
28.9 |
76.3 |
57.2 |
242.7 |
169.1 |
595.9 |
Mod |
| 1965-66 |
21.7 |
30.9 |
31.2 |
59.2 |
150.7 |
89.9 |
101.8 |
485.4 |
Mod |
| 1968-69 |
24.3 |
58.7 |
76.2 |
91.1 |
105.6 |
54.2 |
113.8 |
523.9 |
Weak |
| 1970-71 |
41.1 |
101.0 |
128.9 |
101.5 |
173.5 |
156.6 |
57.7 |
760.3 |
Weak |
| 1972-73 |
41.4 |
125.1 |
215.2 |
83.5 |
117.8 |
150.9 |
166.4 |
900.3 |
Strong |
| 1976-77 |
92.7 |
47.7 |
64.0 |
23.7 |
84.5 |
179.6 |
140.1 |
632.3 |
Weak |
| 1977-78 |
69.7 |
88.3 |
150.8 |
133.0 |
72.8 |
164.6 |
131.6 |
810.8 |
Weak |
| 1982-83 |
16.3 |
44.5 |
101.4 |
57.5 |
89.8 |
103.7 |
173.2 |
586.4 |
Strong |
| 1986-87 |
49.8 |
98.3 |
133.1 |
73.9 |
74.4 |
82.2 |
193.4 |
705.1 |
Mod |
| 1987-88 |
28.7 |
30.9 |
86.0 |
65.6 |
108.6 |
91.4 |
76.1 |
487.3 |
Mod |
| 1991-92 |
11.7 |
22.8 |
85.2 |
68.0 |
78.1 |
129.2 |
105.0 |
500.0 |
Mod |
| 1994-95 |
23.8 |
46.6 |
80.2 |
117.9 |
91.6 |
106.3 |
62.5 |
528.9 |
Mod |
| 1997-98 |
21.1 |
71.1 |
74.0 |
154.9 |
155.8 |
145.3 |
146.2 |
768.4 |
Strong |
| 2002-03 |
30.2 |
74.1 |
88.8 |
81.5 |
134.4 |
148.4 |
108.8 |
666.2 |
Mod |
| 2004-05 |
61.6 |
91.1 |
130.9 |
218.8 |
125.9 |
|
|
|
Weak |
|
|
|
|
|
|
|
|
|
|
|
| ENSO AVG |
34.8 |
61.1 |
99.6 |
93.4 |
106.2 |
130.7 |
126.1 |
643.0 |
|
| AVG |
31.4 |
54.9 |
87.3 |
108.2 |
126.6 |
158.0 |
132.8 |
699.2 |
|
66% chance of above normal flow in strong events, 33% chance in weak to moderate events
La Niña Years
Cincinnati, OH
| |
Oct. |
Nov. |
Dec. |
Jan. |
Feb. |
Mar. |
Apr |
Total Flow |
ENSO |
| 1950-51 |
34.9 |
104.0 |
232.1 |
235.7 |
291.5 |
235.5 |
212.6 |
1346.3 |
Mod |
| 1954-55 |
84.6 |
44.5 |
84.1 |
141.6 |
204.5 |
408.2 |
109.5 |
1077.0 |
Mod |
| 1955-56 |
26.1 |
48.4 |
39.5 |
26.3 |
298.3 |
300.7 |
226.6 |
966.0 |
Mod |
| 1956-57 |
25.1 |
31.7 |
132.4 |
143.5 |
258.7 |
121.6 |
243.3 |
956.3 |
Weak |
| 1961-62 |
20.9 |
50.3 |
107.7 |
139.8 |
148.1 |
302.3 |
205.8 |
974.9 |
Weak |
| 1964-65 |
20.0 |
28.5 |
101.4 |
163.6 |
154.1 |
203.9 |
228.1 |
899.6 |
Weak |
| 1967-68 |
47.9 |
62.6 |
119.5 |
90.4 |
127.5 |
173.1 |
127.4 |
748.4 |
Weak |
| 1970-71 |
48.5 |
128.2 |
154.3 |
128.2 |
230.0 |
196.3 |
76.0 |
961.5 |
Mod |
| 1973-74 |
33.0 |
98.7 |
160.3 |
281.9 |
132.2 |
201.5 |
188.4 |
1096.0 |
Strong |
| 1974-75 |
29.2 |
77.9 |
172.1 |
195.5 |
265.8 |
312.4 |
186.7 |
1239.6 |
Weak |
| 1975-76 |
94.8 |
68.8 |
114.3 |
202.5 |
208.9 |
151.1 |
81.8 |
921.3 |
Strong |
| 1983-84 |
45.6 |
93.8 |
169.9 |
83.3 |
160.8 |
197.1 |
247.2 |
997.7 |
Weak |
| 1984-85 |
35.5 |
102.1 |
144.9 |
104.9 |
167.9 |
197.4 |
150.3 |
903.0 |
Weak |
| 1988-89 |
20.4 |
69.2 |
65.7 |
130.9 |
211.2 |
181.9 |
196.1 |
875.4 |
Strong |
| 1995-96 |
31.4 |
71.0 |
87.7 |
241.7 |
183.4 |
237.0 |
160.9 |
1013.1 |
Weak |
| 1998-99 |
21.1 |
21.5 |
34.5 |
178.2 |
134.9 |
180.3 |
118.0 |
688.5 |
Strong |
| 1999-00 |
20.0 |
39.0 |
69.9 |
62.0 |
183.6 |
117.8 |
186.2 |
678.5 |
Strong |
| 2000-01 |
33.8 |
29.6 |
84.6 |
55.0 |
145.3 |
117.8 |
127.4 |
593.5 |
Weak |
|
|
|
|
|
|
|
|
|
|
|
| La Niña AVG |
37.3 |
65.0 |
115.3 |
144.7 |
189.3 |
218.7 |
170.7 |
940.9 |
|
|
| AVG |
37.7 |
66.4 |
111.8 |
139.7 |
165.6 |
204.4 |
173.1 |
898.7 |
|
20% chance of above normal flow in strong events, 69% chance in weak to moderate events
El Niño Years
Cincinnati, OH
| |
Oct. |
Nov. |
Dec. |
Jan. |
Feb. |
Mar. |
Apr. |
Total Flow |
ENSO |
| 1957-58 |
17.8 |
47.5 |
157.2 |
115.0 |
100.7 |
139.3 |
195.9 |
773.4 |
Mod |
| 1963-64 |
12.0 |
25.0 |
31.0 |
77.5 |
73.9 |
336.6 |
201.7 |
757.7 |
Mod |
| 1965-66 |
34.0 |
37.0 |
35.0 |
86.0 |
193.0 |
104.9 |
120.0 |
609.9 |
Mod |
| 1968-69 |
24.4 |
60.3 |
89.6 |
113.4 |
139.1 |
63.5 |
134.9 |
625.2 |
Weak |
| 1970-71 |
48.5 |
128.2 |
154.3 |
128.2 |
230.0 |
196.3 |
76.0 |
961.5 |
Weak |
| 1972-73 |
47.4 |
164.7 |
280.6 |
110.1 |
151.8 |
198.1 |
221.8 |
1174.5 |
Strong |
| 1976-77 |
104.1 |
61.8 |
78.2 |
33.8 |
97.5 |
217.3 |
177.5 |
770.2 |
Weak |
| 1977-78 |
81.2 |
96.8 |
197.9 |
185.6 |
107.4 |
259.7 |
171.4 |
1100.0 |
Weak |
| 1982-83 |
21.6 |
55.1 |
138.3 |
91.5 |
123.3 |
118.0 |
203.0 |
750.8 |
Strong |
| 1986-87 |
67.1 |
126.5 |
181.0 |
100.9 |
106.0 |
113.6 |
251.2 |
946.3 |
Mod |
| 1987-88 |
31.0 |
34.3 |
99.5 |
84.8 |
146.4 |
120.5 |
110.4 |
626.9 |
Mod |
| 1991-92 |
15.3 |
27.4 |
114.4 |
93.0 |
91.3 |
170.5 |
134.7 |
646.6 |
Mod |
| 1994-95 |
25.5 |
50.9 |
91.8 |
152.6 |
125.3 |
145.5 |
84.2 |
675.8 |
Mod |
| 1997-98 |
22.6 |
67.2 |
76.5 |
176.6 |
195.9 |
172.0 |
197.4 |
908.2 |
Strong |
| 2002-03 |
38.5 |
98.5 |
116.8 |
105.7 |
187.6 |
197.8 |
148.1 |
893.0 |
Mod |
| 2004-05 |
79.2 |
125.0 |
177.5 |
322.0 |
171.8 |
|
|
|
Weak |
|
|
|
|
|
|
|
|
|
|
|
| El Niño AVG |
41.9 |
75.4 |
126.2 |
123.5 |
140.1 |
170.2 |
161.9 |
834.7 |
|
| AVG |
37.7 |
66.4 |
111.8 |
139.7 |
165.6 |
204.4 |
173.1 |
898.7 |
|
66% chance of above normal flow in strong events, 33% chance in weak to moderate events
La Niña Years
Louisville, KY
| |
Oct. |
Nov. |
Dec. |
Jan. |
Feb. |
Mar. |
Apr |
Total Flow |
ENSO |
| 1950-51 |
41.3 |
131.9 |
266.0 |
286.0 |
357.2 |
283.5 |
242.8 |
1608.6 |
Mod |
| 1954-55 |
85.7 |
45.8 |
91.9 |
154.0 |
230.2 |
481.9 |
122.4 |
1211.9 |
Mod |
| 1955-56 |
33.0 |
67.3 |
45.1 |
31.3 |
376.5 |
345.6 |
265.9 |
1164.7 |
Mod |
| 1956-57 |
27.5 |
34.5 |
143.5 |
159.9 |
303.0 |
136.4 |
290.8 |
1095.6 |
Weak |
| 1961-62 |
24.0 |
50.0 |
125.3 |
171.1 |
172.6 |
365.5 |
235.5 |
1144.0 |
Weak |
| 1964-65 |
23.2 |
24.7 |
114.6 |
181.2 |
177.3 |
242.0 |
272.0 |
1035.0 |
Weak |
| 1967-68 |
43.7 |
60.4 |
145.9 |
98.8 |
141.9 |
207.7 |
156.8 |
855.2 |
Weak |
| 1970-71 |
47.1 |
124.1 |
173.8 |
149.4 |
270.0 |
223.3 |
79.8 |
1067.5 |
Mod |
| 1973-74 |
36.1 |
110.0 |
177.5 |
332.0 |
149.6 |
230.9 |
214.6 |
1250.7 |
Strong |
| 1974-75 |
36.3 |
86.8 |
206.4 |
239.3 |
318.5 |
386.3 |
233.3 |
1506.9 |
Weak |
| 1975-76 |
109.9 |
75.6 |
133.6 |
231.3 |
259.2 |
179.6 |
96.1 |
1085.3 |
Strong |
| 1983-84 |
56.6 |
97.2 |
188.8 |
82.1 |
179.0 |
239.2 |
315.6 |
1158.5 |
Weak |
| 1984-85 |
32.2 |
113.5 |
176.5 |
121.0 |
199.8 |
223.9 |
159.5 |
1026.4 |
Weak |
| 1988-89 |
22.0 |
89.6 |
83.0 |
167.8 |
289.6 |
227.7 |
235.2 |
1114.9 |
Strong |
| 1995-96 |
37.6 |
83.0 |
103.8 |
270.2 |
208.7 |
277.5 |
197.9 |
1178.7 |
Weak |
| 1998-99 |
23.3 |
24.1 |
43.8 |
219.9 |
166.0 |
210.8 |
132.5 |
819.9 |
Strong |
| 1999-00 |
21.0 |
41.3 |
78.2 |
77.4 |
221.8 |
142.2 |
213.1 |
795.0 |
Strong |
| 2000-01 |
38.3 |
32.9 |
104.3 |
63.8 |
179.0 |
141.0 |
144.0 |
703.3 |
Weak |
|
|
|
|
|
|
|
|
|
|
|
| La Niña AVG |
41.0 |
71.8 |
133.4 |
168.6 |
233.3 |
255.5 |
200.4 |
1101.2 |
|
| AVG |
38.0 |
68.9 |
122.9 |
165.1 |
194.5 |
242.3 |
204.5 |
1036.2 |
|
40% chance of above normal flow in strong events, 54% chance in weak to moderate events
El Niño Years
Louisville, KY
| |
Oct. |
Nov. |
Dec. |
Jan. |
Feb. |
Mar. |
Apr. |
Total Flow |
ENSO |
| 1957-58 |
19.5 |
67.6 |
187.6 |
136.3 |
122.3 |
154.3 |
224.3 |
911.9 |
Mod |
| 1963-64 |
8.20 |
18.2 |
33.0 |
85.8 |
86.3 |
424.5 |
239.0 |
895.0 |
Mod |
| 1965-66 |
35.6 |
36.6 |
38.5 |
104.1 |
228.9 |
110.6 |
132.9 |
687.2 |
Mod |
| 1968-69 |
23.1 |
60.2 |
102.5 |
142.4 |
168.3 |
69.4 |
161.0 |
726.9 |
Weak |
| 1970-71 |
47.1 |
124.1 |
173.8 |
149.4 |
270.0 |
223.3 |
79.8 |
1067.5 |
Weak |
| 1972-73 |
53.7 |
187.6 |
321.3 |
120.1 |
168.1 |
226.8 |
248.8 |
1326.4 |
Strong |
| 1976-77 |
112.5 |
68.9 |
82.6 |
38.6 |
104.2 |
253.7 |
200.0 |
860.5 |
Weak |
| 1977-78 |
89.1 |
113.6 |
240.7 |
195.8 |
113.4 |
324.5 |
191.7 |
1268.8 |
Weak |
| 1982-83 |
23.0 |
57.0 |
164.5 |
88.8 |
136.6 |
123.4 |
240.5 |
833.8 |
Strong |
| 1986-87 |
78.3 |
146.8 |
215.2 |
114.2 |
123.5 |
145.1 |
285.4 |
1108.5 |
Mod |
| 1987-88 |
32.7 |
37.4 |
109.1 |
102.5 |
172.8 |
136.6 |
134.1 |
725.2 |
Mod |
| 1991-92 |
15.9 |
30.1 |
144.0 |
114.4 |
99.5 |
200.6 |
150.6 |
755.1 |
Mod |
| 1994-95 |
26.4 |
51.6 |
107.7 |
171.0 |
148.9 |
172.1 |
104.2 |
781.9 |
Mod |
| 1997-98 |
24.0 |
75.8 |
92.4 |
199.4 |
227.5 |
201.5 |
242.5 |
1063.1 |
Strong |
| 2002-03 |
44.9 |
122.8 |
145.5 |
126.3 |
228.1 |
240.5 |
179.4 |
1087.5 |
Mod |
| 2004-05 |
95.7 |
161.0 |
215.1 |
383.9 |
208.1 |
|
|
|
Weak |
|
|
|
|
|
|
|
|
|
|
|
| El Niño AVG |
40.7 |
85.0 |
148.3 |
142.1 |
162.9 |
200.5 |
187.6 |
940.0 |
|
| AVG |
38.0 |
68.9 |
122.9 |
165.1 |
194.5 |
242.3 |
204.5 |
1036.2 |
|
66% chance of above normal flow in strong
events, 33% chance in weak to moderate events
La Niña Years
Evansville, IN
| |
Oct. |
Nov. |
Dec. |
Jan. |
Feb. |
Mar. |
Apr |
Total Flow |
ENSO |
| 1950-51 |
47.5 |
148.8 |
308.1 |
342.3 |
405.8 |
364.4 |
282.9 |
1899.8 |
Mod |
| 1954-55 |
87.5 |
47.0 |
95.3 |
174.4 |
250.7 |
557.3 |
181.1 |
1393.3 |
Mod |
| 1955-56 |
36.2 |
69.2 |
52.1 |
32.4 |
444.7 |
427.3 |
310.4 |
1372.3 |
Mod |
| 1956-57 |
34.0 |
40.0 |
146.6 |
170.3 |
378.9 |
160.6 |
339.8 |
1270.2 |
Weak |
| 1961-62 |
27.0 |
56.7 |
154.7 |
198.9 |
194.8 |
472.4 |
298.7 |
1403.2 |
Weak |
| 1964-65 |
27.7 |
29.1 |
136.6 |
204.0 |
215.2 |
258.8 |
322.9 |
1194.3 |
Weak |
| 1967-68 |
48.1 |
69.3 |
189.8 |
110.6 |
169.4 |
237.3 |
235.6 |
1060.0 |
Weak |
| 1970-71 |
56.1 |
134.5 |
188.8 |
182.8 |
288.5 |
268.7 |
90.1 |
1209.5 |
Mod |
| 1973-74 |
39.7 |
120.6 |
229.0 |
424.3 |
198.5 |
278.1 |
262.7 |
1552.9 |
Strong |
| 1974-75 |
59.5 |
95.3 |
219.6 |
287.7 |
369.1 |
481.9 |
318.2 |
1831.3 |
Weak |
| 1975-76 |
130.2 |
89.1 |
157.0 |
276.4 |
308.4 |
197.5 |
118.9 |
1277.5 |
Strong |
| 1983-84 |
61.7 |
110.4 |
226.8 |
104.2 |
199.6 |
260.4 |
362.0 |
1325.1 |
Weak |
| 1984-85 |
45.4 |
132.2 |
211.4 |
167.3 |
211.9 |
261.5 |
203.9 |
1233.6 |
Weak |
| 1988-89 |
23.6 |
101.5 |
100.6 |
206.3 |
316.4 |
261.9 |
254.0 |
1264.3 |
Strong |
| 1995-96 |
44.5 |
100.3 |
107.0 |
272.7 |
246.3 |
320.6 |
227.8 |
1319.2 |
Weak |
| 1998-99 |
23.4 |
26.1 |
45.4 |
251.3 |
214.3 |
241.6 |
140.0 |
942.1 |
Strong |
| 1999-00 |
21.5 |
38.3 |
76.6 |
89.2 |
241.5 |
170.3 |
218.1 |
855.5 |
Strong |
| 2000-01 |
39.0 |
33.3 |
113.2 |
65.1 |
213.0 |
165.6 |
156.4 |
785.6 |
Weak |
| |
|
|
|
|
|
|
|
|
|
| La Niña AVG |
47.4 |
80.1 |
153.3 |
197.8 |
270.4 |
299.2 |
240.2 |
1288.3 |
|
| AVG |
48.7 |
85.7 |
154.8 |
193.9 |
231.2 |
282.4 |
236.2 |
1232.9 |
|
20% chance of above normal flow in strong events, 54% chance in weak to moderate events
El Niño Years
Evansville, IN
| |
Oct. |
Nov. |
Dec. |
Jan. |
Feb. |
Mar. |
Apr. |
Total Flow |
ENSO |
| 1957-58 |
21.6 |
112.2 |
238.8 |
165.4 |
158.5 |
169.0 |
249.2 |
1114.7 |
Mod |
| 1963-64 |
10.1 |
20.9 |
37.1 |
87.6 |
98.4 |
540.1 |
263.1 |
1057.3 |
Mod |
| 1965-66 |
42.9 |
42.5 |
43.1 |
136.5 |
268.7 |
125.8 |
148.5 |
808.0 |
Mod |
| 1968-69 |
26.6 |
65.3 |
110.8 |
163.9 |
220.8 |
81.6 |
193.1 |
862.1 |
Weak |
| 1970-71 |
56.1 |
134.5 |
188.8 |
182.8 |
288.5 |
268.7 |
90.1 |
1209.5 |
Weak |
| 1972-73 |
61.9 |
214.9 |
394.3 |
162.3 |
206.6 |
276.0 |
313.2 |
1629.2 |
Strong |
| 1976-77 |
111.4 |
79.2 |
88.0 |
42.6 |
104.5 |
302.6 |
234.6 |
962.9 |
Weak |
| 1977-78 |
113.7 |
133.6 |
293.4 |
220.3 |
182.3 |
360.6 |
214.9 |
1518.1 |
Weak |
| 1982-83 |
38.0 |
69.7 |
192.1 |
125.5 |
154.3 |
130.5 |
264.0 |
974.1 |
Strong |
| 1986-87 |
79.4 |
151.5 |
255.4 |
115.0 |
124.8 |
166.9 |
324.9 |
1217.9 |
Mod |
| 1987-88 |
38.9 |
42.0 |
107.5 |
129.8 |
205.3 |
143.5 |
145.5 |
812.5 |
Mod |
| 1991-92 |
18.5 |
38.4 |
170.4 |
142.7 |
110.1 |
231.7 |
175.5 |
887.3 |
Mod |
| 1994-95 |
29.5 |
56.8 |
124.9 |
191.7 |
181.0 |
202.2 |
120.3 |
906.4 |
Mod |
| 1997-98 |
25.9 |
80.5 |
104.0 |
217.6 |
241.9 |
219.8 |
266.6 |
1156.3 |
Strong |
| 2002-03 |
62.9 |
155.6 |
178.0 |
154.6 |
252.1 |
292.2 |
214.7 |
1310.1 |
Mod |
|
2004-05 |
97.7 |
175.0 |
244.6 |
458.9 |
223.1 |
|
|
|
Weak |
| |
|
|
|
|
|
|
|
|
|
|
El Niño AVG |
52.2 |
98.3 |
173.2 |
168.6 |
188.8 |
234.1 |
214.5 |
1095.1 |
|
|
AVG |
48.7 |
85.7 |
154.8 |
193.9 |
231.2 |
282.4 |
236.2 |
1232.9 |
|
66% chance of above normal flow in strong events, 42% chance in weak to moderate events
* Observed flows courtesy United States CORPS of Engineers and the United States Geological Survey
Main Link Categories:
Main Page,
AHPS,
Observed Status,
Forecast Status,
Hydro Data,
Forecast Products,
Flood Outlook,
Flash Flood Guid.,
Cinci River Stage,
Observed Precip,
Forecast Precip,
Drought Info,
Z/R Relationships,
Nat'l Snow Cover
HAS Page,
Ground Cond.,
Verification,
Observed Data,
Forecast Data,
Radar Loop,
About OHRFC,
HAS Unit,
River Forecasting,
Maps of the Area,
Vision Statement,
Historical Floods,
Shadyside Event,
Photo Gallery,
Climate Pred. Ctr,
USACE,
Nat'l Flash Flood,
USGS Hydrogphs,
13 RFCs,
La Niña/El Niño,
Contact Us
|
|
www.nws.noaa.gov
