2025-12-20T00:00:00-07:00
...THIS IS A PARTICULARLY DANGEROUS SITUATION FOR IN AND IMMEDIATELY ADJACENT TO THE FOOTHILLS, BETWEEN 5500 AND 9000 FEET, FOR BOULDER AND JEFFERSON COUNTIES ON FRIDAY... Strong west winds, sustained 45-55 mph with gusts upwards of 85- 105 mph, are expected in the foothills of Larimer, Boulder and Jefferson Counties beginning early Friday morning. Relative humidity values are expected to drop into the low teens, possibly upper single digits. While Red Flag conditions, critical fire weather, are expected across a larger area in northern Colorado, the most extreme conditions are expected to be along Highway 93 from Jefferson County into Boulder County and along US-36 north of Boulder to the Larimer County line and westward. There will be a high potential for fast moving wildfires, should any new starts occur. Winds toward I-25 and eastward will be slower to develop, and also speeds will be considerably lighter. That said, gusts of 25- 40 mph are still expected to combine with very low humidity and cured grasses to support critical fire weather conditions. Such conditions may be a longer duration than usual, with potential for low humidity to extend well into the evening hours. * AFFECTED AREA...Fire Weather Zones 238, 240, 241, 242 and 243. * TIMING...From 10 AM this morning to midnight MST tonight. * WINDS...West 15 to 25 mph with gusts up to 60 mph possible west of I-25, and gusts to 40 mph possible along and east of I- 25. * RELATIVE HUMIDITY...As low as 12 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire.
Summary
Total streamflow across the
Allegheny River
was last observed at
28,930
cfs, and is expected to yield approximately
57,382
acre-ft of water today; about 32%
of normal.
River levels are low and may signify a drought.
Average streamflow for this time of year is
91,412 cfs,
with recent peaks last observed
on
2022-02-24 when daily discharge volume was observed at
398,200 cfs.
Maximum discharge along the river is currently at the
Allegheny River At Natrona
reporting a streamflow rate of 8,620 cfs.
This is also the highest stage along the Allegheny River, with a gauge stage of
11.05 ft at this location.
This river is monitored from 10 different streamgauging stations along the Allegheny River, the highest being situated at an altitude of 1,457 ft, the
Allegheny River At Port Allegany.
River Details
| Last Updated | 2025-12-19 |
| Discharge Volume | 57,382 ACRE-FT |
| Streamflow |
28,930.0 cfs
+15620.0 cfs (+117.36%) |
| Percent of Normal | 31.65% |
| Maximum |
398,200.0 cfs
2022-02-24 |
| Seasonal Avg | 91,412 cfs |
River Streamflow Levels
| Streamgauge | Streamflow | Gauge Stage | 24hr Change (%) | % Normal | Minimum (cfs) | Maximum (cfs) | Air Temp | Elevation |
|---|---|---|---|---|---|---|---|---|
|
Allegheny River At Port Allegany
USGS 03007800 |
427 cfs | 2.64 ft | 82.48 | |||||
|
Allegheny River At Eldred
USGS 03010500 |
562 cfs | 3.56 ft | 31.31 | |||||
|
Allegheny River At Salamanca Ny
USGS 03011020 |
1800 cfs | 3.58 ft | -12 | |||||
|
Allegheny River At Kinzua Dam
USGS 03012550 |
1730 cfs | 8.27 ft | 0 | |||||
|
Allegheny River Bl Conewango Creek At Warren
USGS 03015310 |
3360 cfs | 3.63 ft | 13.51 | |||||
|
Allegheny River At West Hickory
USGS 03016000 |
4120 cfs | 4.2 ft | 15.41 | |||||
|
Allegheny River At Franklin
USGS 03025500 |
6130 cfs | 4.33 ft | 3.55 | |||||
|
Allegheny River At Parker
USGS 03031500 |
7370 cfs | 3.42 ft | 25.13 | |||||
|
Allegheny River At Kittanning
USGS 03036500 |
7850 cfs | 10.84 ft | 12.3 | |||||
|
Allegheny River At Natrona
USGS 03049500 |
8620 cfs | 11.05 ft | 0 |
Seasonal Discharge Comparison
Maximum Streamflow Discharge
Streamflow Elevation Profile
The Allegheny River ( AL-ə-GAY-nee) is a 325-mile (523 km) long headwater stream of the Ohio River in western Pennsylvania and New York, United States. The Allegheny River runs from its headwaters just below the middle of Pennsylvania's northern border northwesterly into New York then in a zigzag southwesterly across the border and through Western Pennsylvania to join the Monongahela River at the Forks of the Ohio on the "Point" of Point State Park in Downtown Pittsburgh, Pennsylvania. The Allegheny River is, by volume, the main headstream of both the Ohio and Mississippi Rivers. Historically, the Allegheny was considered to be the upper Ohio River by both Native Americans and European settlers.
The shallow river has been made navigable upstream from Pittsburgh to East Brady by a series of locks and dams constructed in the early 20th century. A 24-mile long portion of the upper river in Warren and McKean counties of Pennsylvania and Cattaraugus County in New York is the Allegheny Reservoir also known as Lake Kinzua, created by the erection of the Kinzua Dam in 1965 for flood control.
The name of the river comes from one of a number of Delaware Indian phrases which are homophones of the English name, with varying translations.