NEAR TERM /THROUGH TONIGHT/...
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An upper level low is slowly drifting south from Ontario toward the Great Lakes. The upper level flow out ahead of the low over our area remains mostly zonal, with weak energy passing through. At the surface, a warm front and any associated isolated showers had lifted just E of the CWA. Early to mid afternoon should remain mostly dry ahead of an approaching cold front. Showers and a few tstms entering western/central PA should moves east and expand in coverage/intensity, reaching western portions of the CWA between 21Z-22Z per 14Z HRRR which has fairly good handle on that activity over PA. Modest buoyancy (MLCAPE 1500-2000) and deep layer shear (35-40kt 0-6 km bulk shear) as this activity approaches will support the potential for a few strong to severe thunderstorms, with the primary threat damaging wind gusts. Expect two separate rounds of storms, one via the activity approaching from PA, another passing mainly across the interior this evening. Coverage looks to be scattered given H7 inversion to be overcome, possibly another developing this afternoon at H8-9 via daytime heating/WAA. SPC Day 1 Convective Outlook has the lower Hudson Valley and S CT under a slight risk of severe thunderstorms and the rest of the area in a marginal risk, but could see justification for including NE NJ and the NYC area in that as well. Highs will be in the mid 80s for most, with the NYC/NJ metro reaching the lower/mid 90s. This combined with dewpoints in the lower/mid 70s will allow for max apparent temperatures in the upper 90s. An isolated brief apparent temperature reading of 100 is possible in the NJ Turnpike corridor of NE NJ. With just one day of apparent temperatures at or above 95 and any 100 degree apparent temperature reading being very isolated, there continues to be no heat headlines after collaboration with neighboring offices. Winds become NW-W briefly behind the cold front and drier air briefly advects into the area. After midnight the entire area should be dry. Lows will be in the mid 60s farther north and west where the cold front will work through first. Across NYC/NJ metro area and Long Island lows will be in the low to mid 70s.
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