textproduct: Wilmington
This forecast discussion was created in the public domain by the National Weather Service. It can be found in its original form here.
WHAT HAS CHANGED
Attention has switched to the next period of active weather later this week and into the weekend.
KEY MESSAGES
1) Clipper moves across the area Friday with light snow accumulations possible.
2) Frigid temperatures to start the weekend.
DISCUSSION
KEY MESSAGE 1)
Ahead of the primary clipper on Friday, an initial shortwave descends through the Great Lakes Thursday. Can't rule out some flurries or periods of light snow Thursday evening, but held off on adding a mention in the forecast due to dry mid-level air in forecast soundings.
The next shortwave is a bit more robust, and is combined with a surface low pressure moving into the Northeast US from Canada. Light accumulating snow of 1 to 2 inches is generally expected across the area with the greatest chances of greater than 2" over the greater Columbus area (20-30%). Impacts will be tied to the timing of the snowfall. If it comes in closer to morning, cold temperatures Thursday night would support accumulations on roadways for the Friday morning commute. If it comes later, temperatures will be less supportive as they rise to near freezing throughout the afternoon.
KEY MESSAGE 2)
The next blast of arctic air moves in behind the cold front on Friday night. Both Saturday and Sunday may feature periods with wind chills near or below zero especially during the morning hours. While confidence is fairly high on these cold temperatures occurring, confidence is also high that this is short- lived. More moderate temperatures and upper level ridging builds next week across the Ohio Valley. Temperatures in the 40s are possible for some on Monday and Tuesday.
AVIATION /12Z WEDNESDAY THROUGH SUNDAY/
MVFR CIGs continue to slowly drift around the area through the TAF period. Occasional breaks are possible today, becoming more likely during the afternoon and evening. Then, the coverage of MVFR CIGs increases again overnight.
Winds are out of the northeast between 5 and 10 knots this morning, becoming more northerly throughout day. TAFs end with light and variable winds, becoming predominately southwesterly on Thursday.
OUTLOOK...Light snow is possible Friday along with MVFR conditions.
ILN WATCHES/WARNINGS/ADVISORIES
OH...None. KY...None. IN...None.
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