Waterlands
Atchafalaya River
USGS · 07381490
ATCHAFALAYA RIVER
USGS · 07381490LIVE

Atchafalaya River at Simmesport, LA

SIMMESPORT, LA30.9825°N, -91.7983°W Updated 19 hr ago
FLOW RATE
255,147cfs
AIR TEMP
90°F
WIND
6mph WNW
FISH INDEX
63SCORE / 100
GOOD · 3 OF 5
Flow Rate Historical Avg
MEDIAN FLOW RATE · 1 YEAR
255,147cfs 37.0% vs avg
Optimal band: 115,432156,172 cfs
PERIOD HIGH
367,365cfs
PERIOD LOW
59,643cfs
RUNNABLE
11%
last 1 year in band
Precipitation History

Precipitation · YTD

Normal

Near-normal year

2026 to date

29.3in

≈ normal

29.29 in of precipitation so far this year — about average for this point in the season (normal 25.99 in).

YTD Total

29.3in

This year so far

Normal to Date

26.0in

30-yr average

Typical Range

18.3–33.6in

10th–90th pct YTD

Departure

+13%

vs 30-yr normal

By Month

This year
Typical range
Normal
Jan: 4.03" · normal 4.91" (2.1–7.4)
Jan
Feb: 1.15" · normal 4.56" (2.1–8.3)
Feb
Mar: 3.54" · normal 4.63" (2.6–7.7)
Mar
Apr: 3.90" · normal 4.76" (1.8–7.1)
Apr
May: 9.22" · normal 4.08" (1.5–6.7)
May
Jun: 7.44" (so far)· normal 4.34" (2.2–7.5)
Jun
Jul: normal 4.35" (2.4–6.3)
Jul
Aug: normal 4.23" (1.6–6.8)
Aug
Sep: normal 3.65" (1.2–6.0)
Sep
Oct: normal 3.74" (0.5–8.3)
Oct
Nov: normal 3.88" (1.9–6.3)
Nov
Dec: normal 4.60" (3.0–6.3)
Dec
Baseline 19912020 · Source: Open-Meteo07:02 PM
SPONSORED
Weather Conditions
WEATHER CONDITIONS
TODAY
90°
77°
WED
87°
77°
THU
90°
74°
FRI
91°
71°
SAT
91°
73°
SUN
91°
72°
MON
92°
73°
TIME
TUE
7
NOW
8
pm
9
pm
10
pm
11
pm
WED
12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
THU
12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
FRI
12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
SAT
12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
SUN
12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
TEMP
hourly forecast
86°
mild
86°
85°
84°
83°
81°
81°
80°
80°
79°
79°
78°
77°
77°
79°
81°
83°
85°
86°
87°
87°
87°
87°
85°
84°
84°
82°
81°
80°
80°
79°
78°
78°
77°
77°
75°
74°
74°
77°
80°
83°
85°
86°
88°
89°
89°
90°
90°
89°
85°
80°
77°
75°
74°
72°
72°
71°
71°
71°
71°
71°
73°
76°
80°
83°
85°
87°
89°
90°
91°
91°
90°
88°
84°
81°
79°
76°
75°
73°
73°
73°
73°
73°
73°
73°
74°
77°
81°
84°
86°
88°
89°
90°
91°
91°
90°
89°
85°
80°
78°
77°
75°
74°
73°
72°
72°
73°
73°
73°
74°
77°
80°
83°
85°
87°
89°
WIND
mph · gust · dir
6mph NE
G 8 mph
6
G8
NE
4
G7
NNE
3
G6
NNE
4
G7
E
3
G7
NE
3
G7
ENE
3
G6
SSE
4
G6
SW
6
G13
WSW
5
G10
SSW
4
G9
SW
5
G11
NW
7
G22
WSW
11
G25
W
8
G14
SW
11
G17
SSW
9
G15
WSW
11
G15
W
9
G15
WNW
11
G18
WNW
9
G16
WNW
8
G13
NW
5
G11
NW
5
G9
NNW
3
G7
NW
2
G6
N
3
ENE
4
G6
NNE
2
G5
NE
3
SW
4
G7
SSW
3
G9
S
6
G13
SW
6
G14
WSW
5
G11
WSW
3
G7
W
4
G9
SW
5
G9
SW
5
G7
SW
6
SW
7
SW
9
SW
9
SW
9
G10
SW
9
G11
SW
8
G11
SW
7
G12
SW
5
G13
SW
6
G11
SSW
9
G17
S
10
G19
S
9
G19
SSW
7
G18
SSW
6
G17
SSW
6
G17
SSW
6
G16
SSW
5
G11
SSW
6
G11
S
5
G11
S
5
G13
SSW
4
G17
S
7
G13
S
8
G17
SSW
10
G14
SSW
11
G14
SSW
12
G15
SSW
12
G15
SSW
11
G16
SSW
11
G15
SSW
11
G15
SSW
11
G15
SSW
11
G16
SSW
10
G19
SSW
9
G22
SSW
10
G23
SSW
8
G23
SSW
8
G24
S
7
G23
S
7
G21
S
6
G21
S
5
G21
S
5
G14
S
5
G10
S
5
G12
SSE
5
G15
SSE
7
G14
S
8
G14
S
10
G14
SSW
10
G15
SSW
9
G15
SSW
9
G15
SSW
8
G14
SSW
8
G13
SSW
9
G12
SSW
8
G12
SSW
9
G13
SSW
9
G17
SSW
8
G20
SSW
8
G21
SSW
7
G21
SSW
6
G20
SSW
6
G19
SSW
6
G18
SSW
6
G14
SSW
6
G8
SSW
5
S
5
S
4
G6
S
3
G7
SSW
3
G7
SSW
3
G7
SSW
4
G7
SSW
5
G7
SSW
5
G7
SSW
6
G7
SSW
PRECIP
chance %
21%
21%
21%
6%
6%
3%
1%
1%
1%
1%
4%
5%
2%
4%
2%
1%
2%
4%
6%
5%
6%
6%
7%
5%
6%
3%
2%
2%
2%
1%
2%
7%
1%
1%
1%
1%
1%
1%
0%
0%
0%
0%
0%
0%
1%
1%
1%
1%
1%
1%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
3%
3%
3%
3%
3%
3%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
6%
6%
6%
6%
6%
6%
2%
2%
2%
2%
2%
2%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
CLOUDS
cover %
65%
mostly
65%
88%
84%
80%
30%
24%
100%
100%
100%
100%
61%
51%
88%
99%
47%
7%
20%
30%
21%
30%
24%
99%
100%
100%
100%
44%
11%
35%
78%
59%
10%
1%
100%
33%
59%
52%
73%
99%
84%
12%
11%
10%
5%
6%
5%
6%
5%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
1%
4%
39%
33%
5%
6%
6%
0%
6%
9%
5%
6%
5%
0%
0%
0%
0%
0%
10%
18%
47%
9%
10%
16%
18%
8%
18%
27%
4%
12%
0%
6%
6%
6%
5%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
6%
16%
12%
10%
5%
1%
0%
0%
0%
PRESSURE
hPa · trend
1018
10181019101910181016101610161017101410151017101710151017101710181016101710181018
TemperatureWind / GustsPrecipitationCloud coverPressure
Nowscroll →
FISH INDEX
63
Temperature
Too Hot
Wind
Light
Pressure
Stable
Moon Phase
Good
DAYLIGHT
SUNRISE
06:04 AM
SUNSET
08:14 PM
14H 10M OF DAYLIGHT1H 4M REMAINING
MOON PHASE
First Quarter
62% illuminated

Station Location

30.9825, -91.7983
Loading map…
DATA · USGS · NOAA · NWSUPDATED 2026-06-23 19:10 UTC
Site #07381490·USGS

Create a free account to save favorites, set flow alerts, and track conditions