kywx
Kentucky AI Weather Engine

Kentucky AI Forecasting Beta

Fri, Jun 12
Sun, Jun 14
Forecast For

Saturday, June 13

Updated Jun 13, 7:14 AM EDT

NWS Alerts Active This Day

Special Weather Statement

Jun 13, 2:23 AM -> Jun 13, 8:00 AM
Moderate Severity

Special Weather Statement issued June 13 at 1:23AM CDT by NWS Paducah KY

Special Weather Statement

Jun 13, 4:05 AM -> Jun 13, 9:00 AM
Moderate Severity

Special Weather Statement issued June 13 at 4:05AM EDT by NWS Louisville KY

Special Weather Statement

Jun 13, 6:10 AM -> Jun 13, 9:00 AM
Moderate Severity

Special Weather Statement issued June 13 at 5:10AM CDT by NWS Paducah KY

Severe Thunderstorm Warning

Jun 13, 5:23 PM -> Jun 13, 5:45 PM
Severe Severity

Severe Thunderstorm Warning issued June 13 at 4:23PM CDT until June 13 at 4:45PM CDT by NWS Paducah KY

Confidence
85%

Afternoon Rain West, Lingering Summer Heat East

A weak mid-level trough will approach from the west on Saturday, bringing increasing cloudiness and light to moderate rain showers to Western and Central Kentucky. The eastern third of the state will remain under the influence of a departing ridge, maintaining dry conditions and peak summer warmth through the day.

Why is this happening?
Technical explanation of the atmospheric setup
Confidence Assessment

High agreement exists regarding temperatures and the overall spatial distribution (West wet / East dry), but timing differences between the NAM and global models on the 12-hour scale introduce minor uncertainty.

Get Personalized Forecasts

Choose which region in Kentucky you're interested in and we'll always show you that one first. You can change your selected region by clicking the "Star" icon on any regional forecast.

Purchase Area

NUISANCE
Paducah, Murray, Mayfield
Rain Ramping Up by Afternoon
Rain
86°/ 68°

Northwest Pennyrile

NUISANCE
Owensboro, Henderson, Morganfield
Late Day Showers Arrive
Rain
86°/ 66°

Southwest Pennyrile

NUISANCE
Hopkinsville, Madisonville, Princeton
Occasional Afternoon Rain
Rain
86°/ 69°

Barren River

Bowling Green, Glasgow, Franklin
Showers Moving In Late
Rain
85°/ 68°

Louisville Metro

NUISANCE
Louisville, La Grange, Shepherdsville
Light Evening Rain Possible
Rain
86°/ 65°

Lincoln Trail

Elizabethtown, Bardstown, Leitchfield
Mostly Dry with Late Clouds
Cloudy
84°/ 64°

Lake Cumberland

Somerset, Columbia, Monticello
Hot and Humid Lake Day
Sunny
87°/ 69°

Northern Kentucky

Covington, Florence, Independence
Bright and Pleasant Saturday
Sunny
84°/ 62°

Inner Bluegrass

Lexington, Georgetown, Winchester
Sunny and Dry Horse Country
Sunny
84°/ 64°

Bluegrass Foothills

Richmond, Danville, Berea
Warm and Mostly Sunny
Sunny
84°/ 63°

Northeast Kentucky

Ashland, Morehead, Grayson
Peak Summer Heat
Sunny
88°/ 61°

Southeast Kentucky

Hazard, Pikeville, Harlan
Sunny and Hot in the Mountains
Sunny
88°/ 67°

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 moisture plume from the southwest phases more aggressively with the incoming trough, rainfall totals in the Purchase and Pennyrile regions could exceed 0.50 inches, with light rain spreading as far east as the I-75 corridor by sunset.

💨

The 'Bust' Scenario

If the dry layer between 850mb and 700mb holds firm, the system may manifest largely as virga or light sprinkles, with measurable rainfall staying confined to the far western counties.

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 Timing Tug-of-War

The NAM suggests a morning start for precipitation (12Z-18Z) driven by a fast-moving shortwave, whereas the GFS and Euro delay onset until the afternoon and evening (18Z-00Z) as a more defined surface boundary approaches.

NAM
VS
GFS
VS
EURO
Why EURO Wins

The Euro provides a superior middle ground for synoptic timing and handles the erosion of the eastern dry air mass more realistically than the NAM's 'precip smear' or the GFS's slightly slower progression.

Affected Regions
PURCHASENORTHWEST PENNYRILESOUTHWEST PENNYRILELOUISVILLE METRO

Purchase QPF Discrepancy

A significant gap exists in rainfall intensity, with the GFS calling for nearly a half-inch of rain in the west while the NAM barely generates a trace.

GFS
VS
NAM
Why BLEND Wins

The GFS likely over-amplifies the moisture convergence, but the NAM is too dry given the strength of the incoming trough. A blend favoring the Euro/GFS totals is more meteorologically sound.

Affected Regions
PURCHASE

Technical Analysis

This section provides a deep, physics-based explanation of the weather. Our AI system analyzed multiple atmospheric layers and variables from all available models to synthesize this technical overview.

Below you'll find detailed breakdowns of the atmospheric dynamics that are driving today's forecast, including thermodynamics, kinematics, and hydrology.

Thermodynamics

Stability & Temperatures

How temperature changes with altitude. This determines whether precipitation falls as rain, snow, sleet, or freezing rain based on the vertical temperature profile.

Thermal Profile Overview

The vertical temperature stack follows a standard summer moist-adiabatic lapse rate with no significant inversions. Freezing levels are exceptionally high, near 14,000 feet.

Thermal Boundary

A weak surface trough is currently positioned over the Mississippi River, expected to move into the Purchase region by mid-afternoon.

Diurnal Trend

Standard diurnal curves are expected; however, western regions will see a flattening of afternoon highs due to cloud cover and evaporative cooling.

Kinematics

Wind & Energy

Wind patterns and atmospheric energy. Frontal passages, jet stream positioning, and vorticity tell us where and when lift will generate precipitation.

Frontal Passage

A weak surface trough will push through the western half of the state between 21Z Saturday and 06Z Sunday, indicated by a subtle wind shift to the west-northwest.

Jet Stream Support

Kentucky is situated in the right-entrance region of a Great Lakes jet streak, aiding in large-scale vertical motion.

Energy Status

A compact shortwave trough is pivoting through the mid-Mississippi Valley with peak vorticity hitting the Pennyrile around 00Z.

Hydrology

Moisture & Precipitation

Moisture content and precipitation character. This reveals whether the atmosphere is saturated enough to produce precipitation, and what type to expect (steady vs. bursts).

Saturation Status

The column is saturated between the surface and 500mb in the west, but a persistent dry layer remains below 850mb in Central and Eastern KY, raising virga risks.

Precipitation Character

Expect stratiform light to moderate rain showers with no convective clusters or lightning.

Flooding Context

No flooding risk. Soils are dry and QPF remains well below any impactful thresholds.

Winter Physics

Accumulation & Layers

Specific physical factors affecting winter weather, including the vertical melt/freeze profile and snow quality.

Layer Analysis

Not applicable; summer season thermal profile.

Crystal Habit

Not applicable.

Road Impact

Not applicable.

Celestial Almanac

Moon Phase

Waning Crescent

4% Illumination
Moonrise
4:46 AM
Moonset
--:--
Purchase Area
Sunrise
6:35 AM
Sunset
9:16 PM
Civil Dawn
6:04 AM
Civil Dusk
9:47 PM
Northwest Pennyrile
Sunrise
6:27 AM
Sunset
9:12 PM
Civil Dawn
5:56 AM
Civil Dusk
9:43 PM
Southwest Pennyrile
Sunrise
6:31 AM
Sunset
9:11 PM
Civil Dawn
6:00 AM
Civil Dusk
9:41 PM
Barren River
Sunrise
6:27 AM
Sunset
9:07 PM
Civil Dawn
5:56 AM
Civil Dusk
9:38 PM
Louisville Metro
Sunrise
6:20 AM
Sunset
9:08 PM
Civil Dawn
5:48 AM
Civil Dusk
9:39 PM
Lincoln Trail
Sunrise
6:22 AM
Sunset
9:07 PM
Civil Dawn
5:51 AM
Civil Dusk
9:38 PM
Lake Cumberland
Sunrise
6:19 AM
Sunset
9:00 PM
Civil Dawn
5:48 AM
Civil Dusk
9:31 PM
Northern Kentucky
Sunrise
6:12 AM
Sunset
9:06 PM
Civil Dawn
5:40 AM
Civil Dusk
9:38 PM
Inner Bluegrass
Sunrise
6:16 AM
Sunset
9:02 PM
Civil Dawn
5:44 AM
Civil Dusk
9:34 PM
Bluegrass Foothills
Sunrise
6:16 AM
Sunset
9:01 PM
Civil Dawn
5:44 AM
Civil Dusk
9:32 PM
Northeast Kentucky
Sunrise
6:07 AM
Sunset
8:56 PM
Civil Dawn
5:35 AM
Civil Dusk
9:28 PM
Southeast Kentucky
Sunrise
6:13 AM
Sunset
8:55 PM
Civil Dawn
5:42 AM
Civil Dusk
9:26 PM

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.