Juniata River at Lewistown

Highest listed crest 42.10 ftFlood stage 23.0 ft11 crests since 1950

The Juniata River at Lewistown crested at major flood stage 4 times among the 11 crests the National Weather Service lists from 1950 to 2018. The highest, 42.10 ft on June 23, 1972, was major flooding, 19.10 feet above flood stage. 3 other gauges on the Juniata River crested above flood stage within a week of it, 1 at its own highest listed crest.

The gauge

Highest listed crest: 42.10 ft; June 23, 1972
Flood stage: 23.0 ft; Major flooding from 28.0 ft
Crests at major: 4; 56th of 170 gauges in Pennsylvania
Most recent flood crest: September 11, 2018; 23.00 ft, minor flooding
Location: Mifflin County; Pennsylvania
Identifiers: NWS LWSP1; USGS 01564895

Flood stages

The thresholds the National Weather Service uses for this gauge today, and how many listed crests reached each.

Flood categories, Juniata River at Lewistown

Action stage	18.0	3	Mar 26, 1994	The level at which the NWS or its partners begin to take action
Flood stage (minor)	23.0	3	Sep 11, 2018	Minimal or no property damage, but possibly some public threat
Moderate flood stage	27.0	1	Feb 15, 1984	Some inundation of structures and roads near the stream
Major flood stage	28.0	4	Sep 19, 2004	Extensive inundation of structures and roads

Every listed crest

11 crests from 1950 to 2018. Filled: at or above flood stage. Hover a crest for its date and stage.

Crests at or above flood stage, by decade

These are the crests the local National Weather Service office lists for the gauge: the highest on record and recent crests. Lesser floods between them may be missing, so counts by decade are a floor.
Categories use today's flood stages. Levees, dams and channel changes since a crest can make old and new stages not directly comparable.
2 crests measured on an earlier gauge datum are left out: 43.30 ft on Jun 1, 1889; 43.00 ft on Mar 18, 1936.

Highest crests

Highest listed crests, Juniata River at Lewistown

1	Jun 23, 1972	42.10	+19.10	Major	—
2	Nov 26, 1950	32.00	+9.00	Major	—
3	Sep 19, 2004	31.68	+8.68	Major	74,600
4	Jan 20, 1996	31.63	+8.63	Major	88,800
5	Feb 15, 1984	27.40	+4.40	Moderate	—
6	Nov 8, 1997	23.60	+0.60	Minor	—
7	Apr 3, 1970	23.30	+0.30	Minor	—
8	Sep 11, 2018	23.00	0.00	Minor	44,626
9	Nov 29, 1993	22.40	−0.60	Action	—
10	Mar 26, 1994	21.34	−1.66	Action	—
11	Feb 23, 1971	19.80	−3.20	Action	—

The worst floods along the Juniata River

For this gauge's highest crests, the other gauges on the Juniata River that crested above flood stage within a week.

June 23, 1972: 42.10 ft here, major flooding

NewportPA · Jun 23, 1972 · 33.97 ft · Major · its highest
Mapleton DepotPA · Jun 23, 1972 · 33.07 ft · Major
HuntingdonPA · Jun 23, 1972 · 20.03 ft · Major

November 26, 1950: 32.00 ft here, major flooding

Mapleton DepotPA · Nov 25, 1950 · 26.40 ft · Major
NewportPA · Nov 26, 1950 · 25.36 ft · Moderate

September 19, 2004: 31.68 ft here, major flooding

HuntingdonPA · Sep 18, 2004 · 17.78 ft · Major
Mapleton DepotPA · Sep 18, 2004 · 23.76 ft · Minor
NewportPA · Sep 19, 2004 · 23.58 ft · Minor

Gauges on the Juniata River

In USGS station-number order, which runs downstream within a river basin.

Flood gauges on the Juniata River

Huntingdon	PA	12.0	22.50 ft, Jun 1, 1889	6
Mapleton Depot	PA	20.0	38.20 ft, Mar 18, 1936	3
Lewistown this gauge	PA	23.0	42.10 ft, Jun 23, 1972	4
Newport	PA	22.0	33.97 ft, Jun 23, 1972	1

Mifflin County: every hazard · River floods across the country · Pennsylvania

NOAA National Water Prediction Service, gauge LWSP1, retrieved October 30, 2026. Stages in feet on the gauge's own datum, not elevation. Crests are as the National Weather Service lists them; preliminary values may be revised.