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
No significant changes.
KEY MESSAGES
1) A weak low pressure system will bring scattered light rain showers back into the area late tonight through the daytime Friday.
2) Some frost is possible Friday night and again Saturday night, with impacts to sensitive vegetation likely.
3) Extended period of cooler conditions settles into the region through the weekend, with slowly moderating temperatures into early next week. A seasonably cool pattern with several chances for light rain will evolve through most of the next week.
DISCUSSION
KEY MESSAGE 1)
Another cold front and weak upper level shortwave trough move through the Ohio Valley late tonight into Friday. Isolated to scattered rain showers are expected during this timeframe. Some graupel and lightning are possible during the day on Friday due to weak instability and some mixed phase hydrometeors in the cloud layer. Highs remain below average on Friday on breezy northwesterly flow.
KEY MESSAGE 2)
Frost is possible on Friday night and Saturday night. The best frost potential on Friday night is across areas along and north of I-70 where cloud cover is more likely to scatter out. For Saturday night, frost potential is greater over the entire area due to high pressure building in from the northwest likely creating better conditions for radiational cooling.
KEY MESSAGE 3)
Cool conditions remain in place through the weekend into next week. A wetter synoptic pattern may also develop next week as a series of surface lows and upper level shortwave troughs progress through the region with mean troughing over the Great Lakes.
AVIATION /18Z THURSDAY THROUGH TUESDAY/
MVFR ceilings continue to scatter this afternoon eventually giving way to VFR conditions. Between 0600z and 1200z Friday, another cold front moves in from the west and likely brings MVFR ceilings to KDAY, KCMH, KILN, and KLCK late tonight into Friday morning. Isolated to scattered rain showers are also possible late tonight and on Friday.
Northwesterly winds around 10 mph continue through the afternoon before becoming light and southerly overnight ahead of the cold front. Northwesterly winds increase once again on Friday behind the front.
OUTLOOK...No significant weather is expected.
ILN WATCHES/WARNINGS/ADVISORIES
OH...None. KY...None. IN...None.
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