12/27 – Payton’s Wednesday Evening Forecast

Surface low over north central gulf will track east southeast
through tonight. At the same time, the frontal zone over the Mid
South will track south into the forecast area. Upper level pattern
maintains a westerly flow with moisture across the forecast area
through Thursday. As a result, rain chances will remain in the
forecast through Thursday morning.

Upper level flow will become more northwesterly as a clipper
deepens the main trough over the Great Lakes to the Mid Atlantic
states late Thursday into Friday. This feature will displace
moisture south of the forecast area Thursday night through
Saturday. Will maintain a dry forecast for this periods with
normal temps.

For next week, mid range models have come slightly closer
together for next week. Upper level flow will become more
westerly as an embedded disturbance dives southeast of the
Rockies on Sunday according GFS, and ECMWF has come in line with
this solution. In addition, GFS has the associated cold surface
ridge is more on the high plains and ECMWF has the ridge over the
plains and Missouri valley. As a result, cold air will dive south
across the forecast area late Sunday through Tuesday.

Cold air could be in place before the moisture pushes east late
Sunday night. As a result, we will maintain a wintry mix Sunday
night after midnight across the Southwest Mississippi and Florida
Parishes with no accumulation at this time. Freezing night time
temperatures are in the forecast except the immediate Louisiana
coast Monday night and Tuesday night, with a hard freeze currently
forecast for northern areas both nights.

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