SPC 0700Z Day 2 Outlook

Day 2 Outlook Image

Day 2 Convective Outlook  
NWS Storm Prediction Center Norman OK
1245 AM CST Thu Dec 24 2020

Valid 251200Z - 261200Z


Thunderstorms are not expected on Friday.

A deep upper trough and embedded closed circulation will be in place
over the eastern CONUS early Friday morning. This upper trough is
forecast to progress northeastward, moving through the Mid-Atlantic
and ending the period with strong negative tilt from eastern
Ontario/western Quebec to off the NC coast. Upper ridging will also
be in place west of this trough, from northern Mexico into Alberta.
This ridge is expected to progress eastward into the High Plains
while dampening. Farther west, a shortwave trough is expected to
move into the Pacific Northwest late in the period.  

At the surface, low associated with the eastern CONUS trough will
begin the period over eastern Ontario/southern Quebec. A cold front
will extend southeastward from this low to just off the southern New
England coast before arcing more southward. With the front already
offshore by early Friday morning and stable conditions in its wake,
no thunderstorms are expected across the central and eastern CONUS.

Strong forcing for ascent and cold temperatures aloft will accompany
the shortwave trough approaching the Pacific Northwest, and a
lightning flash or two may occur in the deeper convection within the
frontal band offshore. However, any lightning is not expected to
continue once the band moves onshore.

..Mosier.. 12/24/2020

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