SPC 1630Z Day 1 Outlook

Day 1 Outlook Image

Day 1 Convective Outlook  
NWS Storm Prediction Center Norman OK
1029 AM CST Sat Jan 16 2021

Valid 161630Z - 171200Z


Very isolated lightning flashes may occur along the New England
coast this afternoon.

...New England...
Bands of semi-organized low-topped convection ongoing near Cape Cod
at midday will transition north-northeastward toward coastal Maine
through the afternoon. While the highest probability of
thunderstorms will remain well offshore, marginally supportive
thermodynamic profiles near the coast could support a few lightning
flashes this afternoon.

...Central Appalachians/Mid-Atlantic States...
Although cloud cover will tend to remain prevalent, modest boundary-
layer heating beneath the upper trough-related mid-level cold core
(-30C to -35C at 500 mb) will yield steepening lapse rates. A few
lightning flashes cannot be entirely ruled out this afternoon, but
the potential/coverage is expected to remain very low overall (less
than 10 percent).

..Guyer/Leitman.. 01/16/2021

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