Rivers in Pennsylvania

Juniata River at Lewistown

Mifflin County, PennsylvaniaNWS LWSP1USGS 01564895State College office

Below flood stage
6.07ftStage

Observed Tue, Sep 22, 5:30 PM EDT

Flood stage
23.00 ft
Forecast crest
9.00 ftWed, Sep 23, 2:00 PM EDT
Record crest
43.30 ft1889

Open the live map with the river flood outlook

Flood stages and impacts

CategoryStage
Major flood28.00 ft
Moderate flood27.00 ft
Minor flood23.00 ft
Action18.00 ft
  1. 43.30 ftFlood of record from June 1889. FEMA 0.2% Annual Chance Flood Level (500-year flood).
  2. 34.50 ftFEMA 1% Annual Chance Flood Level (100-year flood). Widespread inundation occurs on both banks of the river. A large portion of Lewistown is affected by flood waters.
  3. 32.00 ftThe right, or south bank begins to overflow. Expect water up to 6 feet deep in houses on West Elizabeth Street. Expect water up to 2 feet deep in houses on South Main Street.
  4. 31.00 ftFEMA 2% Annual Chance Flood Level (50-year flood).
  5. 30.00 ftWidespread inundation occurs in and around Lewistown. Water reaches South Main Street.
  6. 28.00 ftConsiderable flood damage occurs to homes and businesses in and around lewistown.
  7. 27.00 ftSeveral homes on West Elizabeth Street will flood. Route 22 is also affected.
  8. 25.00 ftBasement flooding occurs in the low lying areas adjacent to the river and Kishacoquillas creek. Athletic fields will be inundated.
  9. 24.50 ftFEMA 10% Annual Chance Flood Level (10-year flood).
  10. 23.00 ftBasements of a few homes in the lowest lying areas will flood. Backwater on Kishacoquillas Creek will affect the athletic fields.

Flood outlook

Chance of flooding, September to November

CategoryChance
Minor flooding16%
Moderate flooding12%
Major flooding11%

The three-month chances are the River Forecast Centers’ long-range flood outlook, issued August 28, 2026.

Crest history

13 crests on NOAA’s list since 1889.

#DateStage
1June 1, 188943.30 ft
2March 18, 193643.00 ft
3June 23, 197242.10 ft
4November 26, 195032.00 ft
5September 19, 200431.68 ft
6January 20, 199631.63 ft
7February 15, 198427.40 ft
8November 8, 199723.60 ft
9April 3, 197023.30 ft
10September 11, 201823.00 ft
11November 29, 199322.40 ft
12March 26, 199421.34 ft
13February 23, 197119.80 ft

Most recent crests

  • September 11, 2018: 23.00 ft
  • September 19, 2004: 31.68 ft
  • November 8, 1997: 23.60 ft
  • January 20, 1996: 31.63 ft
  • March 26, 1994: 21.34 ft
  • November 29, 1993: 22.40 ft
  • February 15, 1984: 27.40 ft
  • June 23, 1972: 42.10 ft
  • February 23, 1971: 19.80 ft
  • April 3, 1970: 23.30 ft

Nearby

Upstream, downstream and the gauges around this one.

What this means

Forecasts by the Middle Atlantic River Forecast Center. Forecasts are issued routinely year-round. Gauge reading may be affected by ice. Forecast flows are unadjusted for ice.

Sources

Stage, flood stages, impacts and crest history from NOAA’s National Water Prediction Service. Streamflow and the daily record from the U.S. Geological Survey.