Northeast US heavy rain and high wind event

October 30th, 2017 |

GOES-16 Mid-level Water Vapor (6.9 µm) images, with hourly precipitation type symbols plotted in red [click to play MP4 animation]

GOES-16 Mid-level Water Vapor (6.9 µm) images, with hourly precipitation type symbols plotted in red [click to play MP4 animation]

* GOES-16 data posted on this page are preliminary, non-operational and are undergoing testing *

GOES-16 Mid-level Water Vapor (6.9 µm) images with hourly surface weather symbols plotted in red (above) showed the large-scale evolution of a storm system that deepened rapidly as it moved across the Northeast US during the 29 October30 October 2017 period (surface analyses). This storm produced widespread high winds and heavy rain (WPC storm summary | NWS Boston PNS | NWS Caribou PNS). Record low sea level pressures for the month of October were set in New York at Albany (977.7 hPa) and Fort Drum (977.5 hPa), and in Massachusetts at Nantucket (982.6 hPa) — a map of the minimum sea level pressures from the New York State Mesonet can be seen here.

Closer views of the Northeast US using images from the GOES-16 Upper-level Water Vapor (6.2 µm), Mid-level Water Vapor (6.9 µm) and Low-level Water Vapor (7.3 µm) bands are shown below, with hourly surface wind gusts (knots) plotted in red. The high winds caused extensive damage to trees and power lines, leading to power outages in some areas — and also contributed to coastal storm surge.

GOES-16 Upper-level Water Vapor (6.2 µm) images, with hourly surface wind gusts (in knots) plotted in red [click to play MP4 animation]

GOES-16 Upper-level Water Vapor (6.2 µm) images, with hourly surface wind gusts (in knots) plotted in red [click to play MP4 animation]

GOES-16 Mid-level Water Vapor (6.9 µm) images, with hourly surface wind gusts (in knots) plotted in red [click to play MP4 animation]

GOES-16 Mid-level Water Vapor (6.9 µm) images, with hourly surface wind gusts (in knots) plotted in red [click to play MP4 animation]

GOES-16 Lower-level Water Vapor (7.3 µm) images, with hourly surface wind gusts (in knots) plotted in red [click to play MP4 animation]

GOES-16 Lower-level Water Vapor (7.3 µm) images, with hourly surface wind gusts (in knots) plotted in red [click to play MP4 animation]

One interesting aspect of this rapidly-deepening storm was the absorption/merging of the northward-moving remnants of Tropical Storm Philippe (storm track), which was shown by the CIMSS 850 hPa relative vorticity product (below).

850 hPa Relative Vorticity product [click to play animation]

850 hPa Relative Vorticity product [click to play animation]

Additional details of this event can be found on the Satellite Liaison Blog.