Waterlands
Lafayette Diversion Pt 4 River
CO DWR · LF4DIVCO
LAFAYETTE DIVERSION PT 4 RIVER
CO DWR · LF4DIVCOLIVE

Lafayette Diversion Pt 4

BOULDER COUNTY, CO39.9903°N, -105.2143°W Updated 1 d ago
FLOW RATE
4cfs
AIR TEMP
76°F
WIND
6mph NNE
FISH INDEX
75SCORE / 100
GREAT · 4 OF 5
Flow Rate Historical Avg
MEDIAN FLOW RATE · 30 DAY
4cfs
Optimal band: 8–10 cfs
PERIOD HIGH
11cfs
PERIOD LOW
4cfs
RUNNABLE
83%
last 30 day in band
Precipitation History

Precipitation · YTD

Dry

Drier than normal

2026 to date

7.9in

-47% vs normal

7.86 in of precipitation so far this year, 47% below the 30-year normal of 14.74 in for this point in the season.

YTD Total

7.9in

This year so far

Normal to Date

14.7in

30-yr average

Typical Range

10.9–18.0in

10th–90th pct YTD

Departure

-47%

vs 30-yr normal

By Month

This year
Typical range
Normal
Jan: 0.88" · normal 0.94" (0.4–1.7)
Jan
Feb: 0.60" · normal 1.02" (0.3–1.6)
Feb
Mar: 1.60" · normal 1.96" (1.1–3.0)
Mar
Apr: 0.93" · normal 3.02" (1.4–4.4)
Apr
May: 2.97" · normal 3.88" (2.2–5.8)
May
Jun: 0.73" · normal 2.90" (1.2–4.9)
Jun
Jul: 0.15" (so far)· normal 2.78" (1.2–4.3)
Jul
Aug: normal 2.64" (1.2–4.1)
Aug
Sep: normal 2.06" (0.5–3.3)
Sep
Oct: normal 1.82" (0.8–3.0)
Oct
Nov: normal 1.27" (0.7–2.3)
Nov
Dec: normal 0.88" (0.3–1.5)
Dec
Baseline 1991–2020 · Source: Open-Meteo15:12 UTC
Your History · Lafayette Diversion Pt 4

Track your history

Sign in to track your sessions at Lafayette Diversion Pt 4 — best days, monthly trends, and time on the water.

Sign in
SPONSORED
Weather Conditions
WEATHER CONDITIONS
TODAY
99°
63°
TUE
96°
64°
WED
96°
64°
THU
94°
63°
FRI
92°
66°
SAT
93°
65°
SUN
96°
65°
TIME
MON
3
NOW
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
TUE
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
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
TEMP
hourly forecast
99°
mild
99°
98°
97°
97°
95°
90°
84°
80°
77°
73°
72°
70°
68°
66°
65°
64°
68°
73°
77°
82°
86°
90°
92°
94°
96°
96°
96°
94°
92°
88°
83°
80°
76°
73°
71°
68°
67°
65°
64°
64°
72°
77°
80°
83°
86°
90°
92°
93°
95°
96°
96°
94°
91°
87°
82°
76°
73°
69°
68°
66°
67°
66°
65°
63°
72°
76°
79°
83°
86°
89°
91°
93°
93°
93°
94°
92°
90°
87°
85°
82°
81°
79°
76°
70°
68°
68°
67°
66°
73°
79°
82°
85°
88°
89°
91°
92°
91°
91°
91°
89°
87°
83°
81°
80°
73°
70°
69°
69°
68°
67°
65°
65°
69°
75°
WIND
mph · gust · dir
8mph ENE
G 14 mph
8
G14
ENE
8
G12
ENE
7
G10
E
10
G12
E
12
G16
ESE
9
G20
SE
7
G17
SE
6
G18
SSE
5
G6
NW
5
G6
N
5
G6
W
5
G6
NW
3
G5
NW
3
G7
NE
3
S
4
W
3
G11
NW
7
G14
N
7
G11
NNE
7
G9
NE
7
G8
ENE
4
G5
ENE
6
G8
ENE
7
G8
ENE
10
G12
ENE
9
G11
ENE
11
G13
E
12
G15
ENE
11
G14
E
12
G22
SE
9
G18
SE
7
G17
SE
0
G11
N
4
G9
N
4
N
4
G5
NW
4
G5
NW
2
G5
ESE
4
WSW
5
SW
3
W
4
NE
5
ENE
6
E
7
ESE
10
SE
9
ESE
8
SE
7
SE
9
ESE
16
ESE
20
ESE
19
ESE
16
G25
SE
13
G20
SSE
10
G16
S
7
G9
SW
5
SW
6
W
8
WNW
7
W
5
W
5
WNW
3
W
2
WSW
4
NE
6
NE
7
NE
8
ENE
7
E
8
ESE
11
ESE
8
G10
SE
5
G9
SSE
10
SE
20
ESE
18
ESE
15
G21
ESE
14
G23
SE
8
G13
SSE
8
G13
SSE
5
G7
SSW
5
WSW
7
W
7
W
6
W
5
W
4
W
3
W
2
ENE
5
ENE
7
G8
ENE
9
E
9
SE
9
SE
13
E
15
E
14
E
13
ESE
15
SE
11
ESE
6
G8
ESE
7
G11
SE
8
G12
SSE
6
SW
7
W
8
W
7
W
6
W
5
W
5
W
4
W
2
G4
NW
3
NNE
PRECIP
chance %
1%
1%
2%
1%
4%
4%
2%
2%
1%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
1%
1%
2%
2%
3%
1%
1%
1%
1%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
1%
1%
1%
1%
1%
1%
0%
0%
0%
0%
0%
0%
1%
1%
1%
1%
1%
1%
4%
4%
4%
4%
4%
4%
4%
4%
4%
4%
4%
4%
1%
1%
1%
1%
1%
1%
2%
2%
2%
2%
2%
2%
14%
14%
14%
14%
14%
14%
10%
10%
10%
10%
10%
10%
2%
2%
2%
2%
2%
2%
5%
5%
CLOUDS
cover %
2%
clear
2%
74%
88%
35%
10%
12%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
5%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
6%
80%
66%
100%
100%
100%
100%
100%
77%
5%
5%
5%
8%
7%
7%
6%
6%
11%
43%
57%
71%
62%
81%
10%
7%
24%
8%
85%
100%
97%
0%
6%
0%
2%
5%
5%
6%
6%
5%
3%
PRESSURE
hPa · trend
844
844842837843845843838841838838838840838839839842841841840
TemperatureWind / GustsPrecipitationCloud coverPressure
Nowscroll →
FISH INDEX
75
Temperature
Warm
Wind
Light
Pressure
Rising — Slow
Moon Phase
Peak Activity
DAYLIGHT
SUNRISE
05:43 AM
SUNSET
08:29 PM
14H 46M OF DAYLIGHT
MOON PHASE
New Moon
2% illuminated
PEAK ACTIVITY

Station Location

39.9903, -105.2143
Loading map…
DATA · CO DWR · NOAA · NWSUPDATED 2026-07-12 00:00 UTC
Site #LF4DIVCO·CO DWR

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

Sign up free