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Tropical cyclones normally threaten the states during the summer and fall, with their main impact being rainfall. [3] Although Hurricane Agnes was barely a hurricane at landfall in Florida, its major impact was over the Mid-Atlantic region, where Agnes combined with a non-tropical low to produce widespread rains of 6 inches (150 mm) to 12 inches (300 mm) with local amounts up to 19 inches (480 ...
The Raystown Branch Juniata River is the largest and longest tributary of the Juniata River in south-central Pennsylvania in the United States. [4]The Raystown Branch Juniata River begins along the Allegheny Front in Somerset County and flows 123 miles (198 km) to the confluence with the Juniata River near Huntingdon. [5]
These techniques may be used in the identification of flood dynamics, [22] [23] storm characterization, [24] [25] and groundwater flow in karst systems. [26] Regression analysis is used in hydrology to determine whether a relationship may exist between independent and dependent variables.
The map to the right shows a flood map for the City of York, including the floodplain for a 1 in 100-year flood (dark blue), the predicted floodplain for a 1 in 1000 year flood (light blue) and low-lying areas in need of flood defence (purple). The most sustainable way of reducing risk is to prevent further development in flood-prone areas and ...
NOAA/USGS map of river flooding, June 29, 2006, around 1530 UTC. Note the purples and reds in the Northeastern United States. Click the image for a color key. The flooding was attributed to several weather factors that all came together over the region. The primary factor was the stalling of the jet stream just to the west of the Appalachian ...
Governor Josh Shapiro, center, joined by local elected official to ceremonially sign House Bill 735 on Monday, Dec. 4 2023. HB 735 establishes the Flood Insurance Premium Assistance Task Force.
Following is a list of dams and reservoirs in Pennsylvania. All major dams are linked below. The National Inventory of Dams defines any "major dam" as being 50 feet (15 m) tall with a storage capacity of at least 5,000 acre-feet (6,200,000 m 3 ), or of any height with a storage capacity of 25,000 acre-feet (31,000,000 m 3 ).
A flood watch has been issued for Adams, Lebanon and York counties as heavy rain is expected to fall this weekend. The National Weather Service says that the area could receive anywhere from 1.5 ...