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Frankstown Branch Juniata River at Williamsburg

Highest listed crest 19.46 ftFlood stage 12.0 ft44 crests since 1889

The Frankstown Branch Juniata River at Williamsburg crested at major flood stage 13 times among the 44 crests the National Weather Service lists from 1889 to 2024. The highest, 19.46 ft on September 18, 2004, was major flooding, 7.46 feet above flood stage.

The gauge

Highest listed crest
19.46 ft
September 18, 2004; 18,000 cubic feet per second
Flood stage
12.0 ft
Major flooding from 15.0 ft
Crests at major
13
7th of 170 gauges in Pennsylvania
Most recent flood crest
April 3, 2024
15.47 ft, major flooding
Location
Blair County
Near Altoona (11.0 mi)

Flood stages

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

Flood categories, Frankstown Branch Juniata River at Williamsburg
Action stage9.00—The level at which the NWS or its partners begin to take action
Flood stage (minor)12.012Aug 4, 2018Minimal or no property damage, but possibly some public threat
Moderate flood stage13.019May 8, 2022Some inundation of structures and roads near the stream
Major flood stage15.013Apr 3, 2024Extensive inundation of structures and roads

Every listed crest

44 crests from 1889 to 2024. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Frankstown Branch Juniata River at Williamsburg, 1889 to 2024 1214161820ft Flood stage 12.0 ftMajor 15.0 ft Jun 1, 1889: 19.10 ft, major flooding; 35,500 cubic feet per secondMay 12, 1924: 12.80 ft, minor floodingFeb 12, 1925: 12.40 ft, minor floodingOct 23, 1929: 13.90 ft, moderate floodingMar 18, 1936: 18.58 ft, major flooding; 30,000 cubic feet per secondMar 18, 1937: 13.90 ft, moderate floodingMar 31, 1940: 12.94 ft, minor floodingMar 11, 1952: 12.82 ft, minor floodingMar 1, 1954: 13.98 ft, moderate floodingOct 16, 1954: 12.27 ft, minor floodingAug 8, 1956: 13.23 ft, moderate floodingMay 9, 1960: 13.36 ft, moderate floodingFeb 26, 1961: 14.12 ft, moderate floodingMar 5, 1963: 12.25 ft, minor floodingMar 10, 1964: 12.04 ft, minor floodingFeb 14, 1966: 13.30 ft, moderate floodingMar 6, 1967: 12.92 ft, minor floodingApr 2, 1970: 13.54 ft, moderate floodingNov 13, 1970: 14.50 ft, moderate floodingJun 23, 1972: 18.39 ft, major flooding; 16,400 cubic feet per secondApr 3, 1977: 12.11 ft, minor floodingMar 5, 1979: 13.05 ft, moderate floodingFeb 15, 1984: 15.38 ft, major floodingApr 5, 1987: 13.76 ft, moderate floodingApr 16, 1993: 14.08 ft, moderate floodingNov 28, 1993: 16.08 ft, major floodingMar 25, 1994: 13.59 ft, moderate floodingJan 19, 1996: 19.15 ft, major flooding; 17,800 cubic feet per secondMar 20, 1996: 12.05 ft, minor flooding; 16,200 cubic feet per secondJul 20, 1996: 13.28 ft, moderate flooding; 8,420 cubic feet per secondNov 8, 1997: 18.20 ft, major floodingJan 2, 2003: 13.49 ft, moderate floodingSep 9, 2004: 16.91 ft, major floodingSep 18, 2004: 19.46 ft, major flooding; 18,000 cubic feet per secondMar 14, 2010: 13.56 ft, moderate flooding; 8,778 cubic feet per secondDec 2, 2010: 15.27 ft, major flooding; 11,640 cubic feet per secondMar 11, 2011: 13.77 ft, moderate flooding; 9,464 cubic feet per secondSep 7, 2011: 14.03 ft, moderate flooding; 9,812 cubic feet per secondFeb 17, 2018: 12.63 ft, minor flooding; 7,895 cubic feet per secondAug 4, 2018: 12.58 ft, minor flooding; 7,830 cubic feet per secondSep 10, 2018: 16.98 ft, major flooding; 14,366 cubic feet per secondSep 2, 2021: 16.55 ft, major flooding; 13,646 cubic feet per secondMay 8, 2022: 13.21 ft, moderate flooding; 8,657 cubic feet per secondApr 3, 2024: 15.47 ft, major flooding; 11,917 cubic feet per second Highest, 19.46 ft, Sep 18, 2004 1900192019401960198020002020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Frankstown Branch Juniata River at Williamsburg 1880s: 1 1890s: 0 1900s: 0 1910s: 0 1920s: 3 1930s: 2 1940s: 1 1950s: 4 1960s: 6 1970s: 5 1980s: 2 1990s: 7 7 2000s: 3 2010s: 7 2020s: 3 1880s1900s1920s1940s1960s1980s2000s2020s
  1. 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.
  2. Categories use today's flood stages. Levees, dams and channel changes since a crest can make old and new stages not directly comparable.

Highest crests

Highest listed crests, Frankstown Branch Juniata River at Williamsburg
1Sep 18, 200419.46+7.46Major18,000
2Jan 19, 199619.15+7.15Major17,800
3Jun 1, 188919.10+7.10Major35,500
4Mar 18, 193618.58+6.58Major30,000
5Jun 23, 197218.39+6.39Major16,400
6Nov 8, 199718.20+6.20Major—
7Sep 10, 201816.98+4.98Major14,366
8Sep 9, 200416.91+4.91Major—
9Sep 2, 202116.55+4.55Major13,646
10Nov 28, 199316.08+4.08Major—
11Apr 3, 202415.47+3.47Major11,917
12Feb 15, 198415.38+3.38Major—
13Dec 2, 201015.27+3.27Major11,640
14Nov 13, 197014.50+2.50Moderate—
15Feb 26, 196114.12+2.12Moderate—
16Apr 16, 199314.08+2.08Moderate—
17Sep 7, 201114.03+2.03Moderate9,812
18Mar 1, 195413.98+1.98Moderate—
19Oct 23, 192913.90+1.90Moderate—
20Mar 18, 193713.90+1.90Moderate—
21Mar 11, 201113.77+1.77Moderate9,464
22Apr 5, 198713.76+1.76Moderate—
23Mar 25, 199413.59+1.59Moderate—
24Mar 14, 201013.56+1.56Moderate8,778
25Apr 2, 197013.54+1.54Moderate—
26Jan 2, 200313.49+1.49Moderate—
27May 9, 196013.36+1.36Moderate—
28Feb 14, 196613.30+1.30Moderate—
29Jul 20, 199613.28+1.28Moderate8,420
30Aug 8, 195613.23+1.23Moderate—
31May 8, 202213.21+1.21Moderate8,657
32Mar 5, 197913.05+1.05Moderate—
33Mar 31, 194012.94+0.94Minor—
34Mar 6, 196712.92+0.92Minor—
35Mar 11, 195212.82+0.82Minor—
36May 12, 192412.80+0.80Minor—
37Feb 17, 201812.63+0.63Minor7,895
38Aug 4, 201812.58+0.58Minor7,830
39Feb 12, 192512.40+0.40Minor—
40Oct 16, 195412.27+0.27Minor—
41Mar 5, 196312.25+0.25Minor—
42Apr 3, 197712.11+0.11Minor—
43Mar 20, 199612.05+0.05Minor16,200
44Mar 10, 196412.04+0.04Minor—

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

NOAA National Water Prediction Service, gauge WIBP1, 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.