Meteorological analysis of the Johnstown, Pennsylvania, flash flood, 19-20 July 1977

Meteorological analysis of the Johnstown, Pennsylvania, flash flood, 19-20 July 1977 by Atmospheric Physics and Chemistry Laboratory (U.S.) Download PDF EPUB FB2

19-20 July 1977 book Meteorological analysis of the Johnstown, Pennsylvania, flash flood, July Boulder Colo.: Dept. of Commerce, National Oceanic and Atmospheric Administration, Environmental Research Laboratories, Atmospheric Physics and Chemistry Laboratory, (OCoLC) Material Type.

Meteorological analysis of the Johnstown, Pennsylvania, flash flood, July / L. Ray Hoxit [et al.] ; with appendices by Douglas R. Greene, and Robert E. Saffle, and Roderick A. Scofield Item PreviewPages: Johnstown Flood: photo credit: Tribune Democrat.

On the evening of July 19th,Multiple thunderstorms rolled through western Pennsylvania dropping 2 to 12 inches of rain. The heaviest rain fell over the southern half of Cambria County where 10 to 12 inches accumulated. Meteorological Analysis of the Johnstown, Pennsylvania, Flash Flood, 19–20 July NOAA Tech.

Rept. ERL A NTIS Accession No. PB Figure 4. Meteorological analysis of the Johnstown, Pennsylvania, flash flood, July / By Atmospheric Physics and Chemistry Laboratory. and Lee R. Hoxit. Abstract. Oct. Mode of access: Internet Topics: Meteorology. Johnstown then experienced another deadly flood on July, when localized but intense nighttime thunderstorms dumped close to 12” of rain in the area.

A flash flood hits Johnstown, Pennsylvania, on Jkilling 84 people and causing millions of dollars in damages.

This flood came 88 years after the infamous Great Flood. National Oceanic and Atmospheric Administration, Johnstown, Pennsylvania, flash flood of July 19–20 Google Scholar National Oceanic and Atmospheric Administration, Natural Disaster Survey Rep.

77–1, United States Department of Commerce, 60 pp. Google Scholar. The Johnstown Flood (locally, the Great Flood of ) occurred onafter the catastrophic failure of the South Fork Dam, located on the south fork of the Little Conemaugh River, 14 miles (23 km) upstream of the town of Johnstown, dam broke after several days of extremely heavy rainfall, releasing million cubic meters of water.

The second "great flood" to hit Johnstown, Pa., happened on J It was, however, the third flood to devastate the town in Cambria County.

For example, part of the warning problem associated with the 19–20 July Johnstown, Pennsylvania, flash flood (Bosart and Sanders ) is readily apparent in the time series. Most of the more than 8 inches that fell at Johnstown occurred after the late evening news, which was probably the last good opportunity to reach the public with.

Quasi-stationary, or very slowly moving, storm systems are of particular interest to the forecaster, because they frequently produce heavy rainfall and flash floods.

These convective weather systems are composed at any moment of many individual storms, all in various stages of their life cycles. Get your 3-Day weather forecast for Johnstown, PA.

Hi/Low, RealFeel, precip, radar, & everything you need to be ready for the day, commute, and weekend. Courtesy of the Meteorological Analysis of the Johnstown, Pennsylvania Flash Flood, July and Johnstown Redevelopment Authority History of Johnstown Floods Johnstown has always had a problem with flooding as it sits in the heart of a valley 20 miles long and 4 miles wide.

The most famous floods were those in and Characteristics of western region flash flood events in GOES imagery and conventional data.

Published Date: Meteorological analysis of the Johnstown, Pennsylvania, flash flood, July National Heavy Precipitation Workshop Pittsburgh, Pa.), sponsor. Published Date: Series: NOAA technical memorandum NWS ER ; Jul 19 Floods in Johnstown, Pennsylvania, kill 76 Jul 20 Flash flood hits Johnstown, Pennsylvania, kills 80 and causes $ million damage Jul 20 The Central Intelligence Agency releases documents under the Freedom of Information Act revealing it had engaged in mind control experiments.

Be prepared with the most accurate day forecast for Johnstown, PA with highs, lows, chance of precipitation from The Weather Channel and   In mid-July oftorrential storms hit the Johnstown area, dropping up to inches of rain in just 8 hours.

This equated to approximately a year storm. By a.m., flooding resulted in loss of communication, and by a.m. water reached. Widespread thunderstorms associated with two major squall lines, moved across Pennsylvania between the afternoon of July 19 and morning of J The western part of outflow boundary produced by the second line became almost stationary in western Pennsylvania and resulted in 6 to 9 hours of nearly continuous thunderstorms.

More than 6 inches of rain fell over a square-mile area. Johnstown PA Flood J John Chancellor Vanderbilt Television News Archive. For educational use only. Hazardous Weather Outlook ; Flash Flood Watch in effect from J PM EDT until J PM EDT; Johnstown PA Flash Flood Watch until J pm.

Click here for hazard details and duration Flash Flood Watch until J pm. NOW until pm Tue. Flash Flood Watch. Tonight. Chance Showers. Low: 60 °F. RICHLAND TOWNSHIP, Pa., July 20A nightlong seven‐inch rainfall caused severe flooding and killed at least la persons in Johnstown and surrounding Communities, leaving Johnstown an island today.Figure 1 Damage resulting from the Johnstown, Pennsyl-vania, flash flood event.

(r The Johnstown Tribune-Democrat, Pennsylvania, Flash Flood, 19–20 July NOAA Technical Report ERL A NTIS Accession No. PB) The major flooding event during June and July of was the result of a weather pattern (Figure 5A.