Thursday, May 7
Sunshine Returns After Early Mountain Showers
A pleasant spring day is in store for Kentucky as high pressure builds in from the northwest. Aside from light early-morning showers in the far southeastern coalfields, the state will enjoy widespread sunshine with seasonable temperatures in the low to mid-60s.
Confidence Assessment
Strong model agreement on the synoptic pattern and the location of the surface high pressure. The only minor uncertainty lies in the exact timing of cloud clearing in the eastern mountains.
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Purchase Area
A perfectly clear day is expected for Paducah and surrounding areas. After a cool start, plenty of sunshine will help temperatures reach a comfortable high of 65 degrees.
Northwest Pennyrile
Expect full sunshine throughout the day. The morning will be a bit breezy with gusts up to 20 mph before winds calm down in the afternoon.
Southwest Pennyrile
A beautiful day is in store for Hopkinsville with blue skies and temperatures warming into the mid-60s.
Barren River
Bowling Green will see plenty of sun. Be prepared for some brisk morning wind gusts over 25 mph before conditions settle in the afternoon.
Louisville Metro
The Louisville area will enjoy full sunshine and a high of 63. It's a great day for outdoor activities as winds remain manageable.
Lincoln Trail
Sunshine will be the rule for Elizabethtown and Bardstown. Highs will reach the low 60s following a chilly start.
Lake Cumberland
After a cloudy start, skies will clear quickly by mid-morning. The rest of the day will be sunny with a high of 62.
Northern Kentucky
A bright but cool day for Covington. Morning winds will be a bit brisk, keeping the feel crisp despite the sun.
Inner Bluegrass
Lexington will enjoy full sunshine. It will be breezy during the morning hours, but winds will settle for a pleasant afternoon.
Bluegrass Foothills
Richmond and Berea will see a beautiful afternoon with sunny skies and comfortable 61-degree weather.
Northeast Kentucky
Morning clouds in Ashland will give way to a bright and sunny afternoon with a high of 63.
Southeast Kentucky
Expect some light rain showers and cloudy skies through mid-morning. The sun will break through by the afternoon as high pressure takes control, leading to a high of 60.
Possible Outcomes
Weather forecasting involves uncertainty. Below are two scenarios representing the range of possible outcomes: the "Boom" scenario shows the worst-case/highest-impact result if conditions align unfavorably, while the "Bust" scenario shows the best-case/lowest-impact result if the forecast doesn't materialize as expected.
The 'Boom' Scenario
If the dry air advects faster than modeled, clear skies could allow for high solar insolation to push temperatures into the upper 60s across the Western Purchase and Pennyrile regions.
The 'Bust' Scenario
If low-level moisture remains trapped in the eastern valleys (orographic blocking), cloud cover could persist through the afternoon in the Coalfields, keeping highs struggling to reach the upper 50s.
Model Disagreements
When models disagree, a call must be made to determine the most likely outcome. This decision is based on a combination of factors including model performance, historical data, and the models general accounting of each climatic region of Kentucky.
The Southeast Moisture Scour
The GFS remains the dry outlier, showing zero precipitation in the southeast, while the NAM, Euro, and GEM all indicate a light trace to 0.03 inches of rain from a departing shortwave.
Why EURO Wins
The Euro provides a balanced middle ground for the timing of the moisture exit, supported by the NAM's better resolution of the shortwave energy and the GEM's moisture persistence.
The Morning Mixing Gradient
NAM and GEM suggest a much tighter pressure gradient on the leading edge of the building high, resulting in morning gusts near 30 mph, whereas GFS and Euro are significantly lighter.
Why NAM Wins
High-resolution mesoscale models like the NAM typically capture the vertical mixing and momentum transfer of the boundary layer more accurately in post-frontal environments.
Celestial Almanac
Waning Gibbous
Purchase Area
Northwest Pennyrile
Southwest Pennyrile
Barren River
Louisville Metro
Lincoln Trail
Lake Cumberland
Northern Kentucky
Inner Bluegrass
Bluegrass Foothills
Northeast Kentucky
Southeast Kentucky
Dive Deeper Into the Models
This forecast is a synthesis of raw data from the NAM, GFS, ECMWF, and GEM models. These models provide detailed atmospheric analyses including 500mb vorticity, precipitation rates, and more. You can take a look at the raw model data by clicking the links below.