Sunday, July 26
Muggy and Damp: A Persistent July Sizzle with Scattered Rain
A humid and unsettled weather pattern will dominate Kentucky, characterized by high dewpoints and scattered light rain showers across the Commonwealth. While widespread heavy rain is not expected, the combination of high moisture and weak atmospheric energy will keep skies mostly cloudy and the air feeling very tropical.
Confidence Assessment
The 6-day lead time and the convective, localized nature of summer precipitation introduce timing and coverage uncertainty, though the humid thermal profile is high-confidence.
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Purchase Area
Expect light rain showers during the morning hours, with totals around 0.01 inches. The afternoon will turn drier but remain very humid with highs reaching the upper 80s.
Northwest Pennyrile
Showers will be most likely in the morning and again late in the evening. Rainfall will be very light, with consensus totals near 0.02 inches.
Southwest Pennyrile
A few light showers are expected before noon, tapering off for the afternoon. Humid conditions will persist with temperatures in the mid-80s.
Barren River
Scattered light rain will persist through the afternoon, ending by sunset. Expect around 0.02 inches of rain in the Bowling Green area.
Louisville Metro
Off-and-on light showers will occur throughout the day and into the night. Accumulations around 0.04 inches are expected under muggy skies.
Lincoln Trail
The best chance for rain falls before sunset, with totals near 0.03 inches. Conditions will remain humid and cloudy throughout the day.
Lake Cumberland
Expect light rain to move through during the morning and afternoon. Rainfall totals around 0.03 inches are anticipated.
Northern Kentucky
Steady light rain will become more frequent during the evening hours. Expect total rainfall around 0.06 inches.
Inner Bluegrass
Light rain will start and end the day, with persistent clouds throughout. Accumulations are expected to be around 0.04 inches.
Bluegrass Foothills
Rain is most likely during the first half of the day. Totals should stay light, around 0.03 inches.
Northeast Kentucky
Cloudy skies will give way to a steadier period of light rain this evening. Rainfall totals will reach around 0.07 inches.
Southeast Kentucky
Off-and-on light rain will continue from early morning through the evening. Accumulations around 0.06 inches are expected in the mountain valleys.
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
Localized training of showers could lead to isolated rainfall totals exceeding 1.0 inch if mid-level energy pulses over-perform, particularly in the Eastern Coalfields.
The 'Bust' Scenario
A more pronounced 'dry slot' could develop if the trough axis shifts faster, leaving much of the state with nothing more than persistent overcast skies and high humidity.
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 Coverage Conflict
A disagreement between global models on the extent of light precipitation. The GFS typically over-smears light rain across the entire region, while the ECMWF suggests a more fragmented, moisture-starved reality in the west.
Why EURO Wins
The ECMWF handles dry slots and moisture cutoffs with superior precision in weak-flow summer regimes, avoiding the GFS tendency for 'phantom' light precipitation.
Rainfall Efficiency War
The NAM suggests slightly higher localized totals due to better resolution of low-level convergence, whereas the GEM and GFS remain very light and stratiform.
Why UNCERTAIN Wins
In a low-CAPE environment, neither model has a clear physical advantage; a blend is used to account for localized variability.
Celestial Almanac
Waxing 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
Forecast Charts
These maps are generated by the weather agencies based on the raw data that the weather models predict. The final forecast is generated using the same raw data shown on the map. Keep in mind that the models (and therefore the maps) will generally disagree on specific parts of the forecast. Use these as guidance - not as a final prediction.
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.