During the morning of 29 October, Tropical Storm Philippe raced northeast away from the Florida coast. GOES-16 VIS/IR sandwich shows the center of circulation clearly with convective activity displaced well to the northeast (Fig. 1).

Figure 1: 29 October 2017 GOES-16 VIS/IR Sandwich. Full res

Philippe is expected to become post-tropical today and be absorbed into an approaching negatively-tilted trending trough and rapidly developing surface low over the northeast. This system is expected to produce heavy rainfall over the northeast US given abundant tropical moisture feeding into the system. In fact, satellite-derived blended TPW indicates column moisture over 200% of normal this morning from off the coast of Florida into Canada north of New York (Fig. 2).

FIgure 2: satellite-derived blended TPW (left), and percent of normal (right). Full res

GOES-16 derived winds outline the east coast upper-level trough and embedded jet pattern. A 300 mb jet max of around 150 knots is already measured over Pennsylvania advancing into New York, the timing of which is slightly ahead of the strengthening indicated in the models. The winds also outline the development of the baroclinic leaf structure (Fig. 3).

Figure 3: 29 October 2017 GOES-16 upper-level water vapor imagery and derived motion winds. Full res

Strengthening and progression of the east coast storm system SUnday through early Monday morning can be analyzed in GOES-16 upper-level water vapor imagery (Fig 4).

Figure 4: 29-30 October 2017 GOES-16 6.19 um Upper-Level Water Vapor Imagery. Full res

-Bill Line, NWS

“The GOES-16 data posted on this page are preliminary, non-operational data and are undergoing testing. Users bear all responsibility for inspecting the data prior to use and for the manner in which the data are utilized.”