kywx
Kentucky AI Weather Engine

Kentucky AI Forecasting Beta

Thu, May 21
Sat, May 23
Forecast For

Friday, May 22

Updated May 22, 6:58 AM EDT

NWS Alerts Active This Day

Flood Watch

May 22, 2:20 AM -> May 22, 12:00 PM
Severe Severity

Flood Watch issued May 22 at 2:20AM EDT until May 23 at 8:00AM EDT by NWS Charleston WV

Flood Watch

May 22, 2:21 AM -> May 22, 10:30 AM
Severe Severity

Flood Watch issued May 22 at 2:21AM EDT until May 23 at 5:00AM EDT by NWS Wilmington OH

Flood Watch

May 22, 3:00 AM -> May 22, 5:00 PM
Severe Severity

Flood Watch issued May 22 at 3:00AM EDT until May 23 at 8:00AM EDT by NWS Louisville KY

Flood Watch

May 22, 3:00 AM -> May 22, 12:15 PM
Severe Severity

Flood Watch issued May 22 at 3:00AM EDT until May 23 at 8:00AM EDT by NWS Jackson KY

Flood Watch

May 22, 8:50 AM -> May 22, 5:00 PM
Severe Severity

Flood Watch issued May 22 at 8:50AM EDT until May 23 at 8:00AM EDT by NWS Charleston WV

Flood Watch

May 22, 9:24 AM -> May 22, 7:00 PM
Severe Severity

Flood Watch issued May 22 at 9:24AM EDT until May 23 at 5:00AM EDT by NWS Wilmington OH

Flood Watch

May 22, 11:50 AM -> May 23, 5:00 AM
Severe Severity

Flood Watch issued May 22 at 11:50AM EDT until May 23 at 5:00AM EDT by NWS Louisville KY

Flood Watch

May 22, 11:50 AM -> May 23, 5:00 AM
Severe Severity

Flood Watch issued May 22 at 11:50AM EDT until May 23 at 5:00AM EDT by NWS Louisville KY

Flood Watch

May 22, 12:23 PM -> May 22, 11:00 PM
Severe Severity

Flood Watch issued May 22 at 12:23PM EDT until May 23 at 5:00AM EDT by NWS Wilmington OH

Flood Watch

May 22, 12:34 PM -> May 22, 8:45 PM
Severe Severity

Flood Watch issued May 22 at 12:34PM EDT until May 23 at 8:00AM EDT by NWS Charleston WV

Flood Watch

May 22, 12:54 PM -> May 22, 9:00 PM
Severe Severity

Flood Watch issued May 22 at 12:54PM EDT until May 23 at 8:00AM EDT by NWS Jackson KY

Flood Watch

May 22, 7:14 PM -> May 23, 8:00 AM
Severe Severity

Flood Watch issued May 22 at 7:14PM EDT until May 23 at 8:00AM EDT by NWS Jackson KY

Flood Watch

May 22, 7:57 PM -> May 23, 4:00 AM
Severe Severity

Flood Watch issued May 22 at 7:57PM EDT until May 23 at 8:00AM EDT by NWS Charleston WV

Confidence
85%

Soaking Rain and Gusty Winds Sweep Across Kentucky

A statewide stratiform rain event will impact the Commonwealth on Friday, driven by a deep moisture plume and moderate jet support. Rainfall totals will range from 0.5 to 1.8 inches, with the heaviest amounts expected in Northern and Eastern Kentucky where terrain and moisture convergence maximize efficiency. Temperatures will remain mild in the 60s and 70s.

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

Strong agreement exists on the precipitation type (all rain) and the overall timing of the system. Confidence is slightly tempered by model variance in localized rainfall bullseyes in the eastern terrain and the exact magnitude of wind gusts.

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
Morning Showers and Comfortable Temperatures
Rain
69°/ 62°

Northwest Pennyrile

IMPACTFUL
Owensboro, Henderson, Morganfield
Soaking Rain Arriving Midday
Heavy_Rain
70°/ 60°

Southwest Pennyrile

NUISANCE
Hopkinsville, Madisonville, Princeton
Breezy with Afternoon Showers
Rain
72°/ 63°

Barren River

NUISANCE
Bowling Green, Glasgow, Franklin
Warm and Windy with Frequent Showers
Rain
73°/ 64°

Louisville Metro

NUISANCE
Louisville, La Grange, Shepherdsville
Steady Rain Impacts the Evening Commute
Rain
69°/ 60°

Lincoln Trail

NUISANCE
Elizabethtown, Bardstown, Leitchfield
Windy and Wet Along the Escarpment
Rain
71°/ 60°

Lake Cumberland

IMPACTFUL
Somerset, Columbia, Monticello
Soaking Rain for the Plateau
Heavy_Rain
70°/ 63°

Northern Kentucky

IMPACTFUL
Covington, Florence, Independence
Soggy Friday with Consistent Rain
Rain
66°/ 57°

Inner Bluegrass

IMPACTFUL
Lexington, Georgetown, Winchester
Heavy Rain and Windy in Lexington
Heavy_Rain
69°/ 59°

Bluegrass Foothills

IMPACTFUL
Richmond, Danville, Berea
Significant Rainfall and Potential Ponding
Heavy_Rain
70°/ 60°

Northeast Kentucky

IMPACTFUL
Ashland, Morehead, Grayson
Heavy Soaking Rain with Flood Potential
Heavy_Rain
66°/ 59°

Southeast Kentucky

NUISANCE
Hazard, Pikeville, Harlan
Damp and Breezy in the Mountains
Rain
70°/ 63°

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 orographic enhancement in the Eastern Coalfields and the Muldraugh Escarpment maximizes and the vorticity lobe slows, localized rain totals could exceed 2.5 inches, leading to minor flash flooding and rapid rises in small creeks.

💨

The 'Bust' Scenario

If a dry slot develops or the primary moisture axis shifts further north into Ohio, rainfall totals may struggle to reach 0.5 inches for much of Central and Western Kentucky, resulting in a cloudy but less impactful day.

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 Momentum Transfer Conflict

The GFS and NAM forecast frequent wind gusts between 28 and 33 mph throughout the afternoon, while the Euro and GEM suggest a much calmer surface environment.

GFS
VS
NAM
VS
EURO
Why GFS Wins

The GFS typically handles momentum transfer within the boundary layer better in moist, neutral profiles. Given the 850mb jet strength shown across all models, the higher gust potential is physically more plausible than the near-calm Euro solution.

Affected Regions
BARREN RIVERLINCOLN TRAILBLUEGRASS CORESOUTHWEST PENNYRILE

The Eastern Rainfall Surge

A significant disagreement exists regarding rainfall totals in Northeast Kentucky. The GEM and NAM suggest a heavy bullseye exceeding 2 inches due to orographic lift and moisture convergence, while the GFS and Euro maintain a more conservative 1-inch threshold.

NAM
VS
GFS
VS
EURO
Why BLEND Wins

While the GEM's 2.3-inch total appears to be an outlier, the NAM's high-resolution support for terrain-induced lift suggests that GFS/Euro are likely under-forecasting the impact of the Appalachian foothills. A weighted blend favoring the higher totals is the most prudent path.

Affected Regions
NORTHEAST KYSOUTHEAST COALFIELDSBLUEGRASS FOOTHILLS

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 column is characterized by a moist adiabatic lapse rate with no sub-freezing layers. Surface temperatures are well above thresholds for wintry precipitation, and the 0C isotherm remains above 10,000 feet.

Thermal Boundary

The freezing line and primary thermal boundary remain well north of the Ohio River, keeping Kentucky entirely within the warm, moist sector.

Diurnal Trend

A non-diurnal temperature trend is expected in Northern and Central regions where thick cloud cover and rain will suppress afternoon heating, keeping highs in the mid-60s.

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 cold front will approach Western Kentucky late in the evening, evidenced by a slight wind shift and a modest drop in dewpoints after 00z Saturday.

Jet Stream Support

Strong synoptic lift is provided by the right-entrance region of an upper-level jet, with the 500mb jet streak providing broad divergence aloft.

Energy Status

A series of compact shortwave troughs are embedded in the southwesterly flow, providing waves of positive vorticity advection (PVA) throughout the day.

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 atmospheric column is deeply saturated from the surface to 400mb. Large dewpoint depressions are absent, eliminating any virga risk.

Precipitation Character

Precipitation will be primarily stratiform but will feature embedded convective bursts of higher intensity during periods of peak vorticity.

Flooding Context

The ground is generally receptive, but the potential for 1.5 to 2.0 inches in the Foothills and Northeast could lead to localized ponding and drainage issues.

Winter Physics

Accumulation & Layers

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

Layer Analysis

Not applicable; all layers remain above freezing.

Crystal Habit

Not applicable.

Road Impact

Impacts are limited to wet roads and reduced visibility in heavy downpours.

Severe Risk

Instability & Shear

Atmospheric ingredients required for severe thunderstorms, including available fuel (CAPE) and storm organization (shear).

Shear Analysis

Moderate deep-layer shear is present, but the lack of instability limits storm organization.

Instability Context

CAPE values are near 0 J/kg statewide, precluding widespread severe thunderstorm development.

Primary Threat

None; the main threat is localized heavy rain and gusty non-convective winds.

Celestial Almanac

Moon Phase

Waxing Crescent

39% Illumination
Moonrise
12:36 PM
Moonset
2:06 AM
Purchase Area
Sunrise
6:42 AM
Sunset
9:02 PM
Civil Dawn
6:12 AM
Civil Dusk
9:32 PM
Northwest Pennyrile
Sunrise
6:34 AM
Sunset
8:58 PM
Civil Dawn
6:04 AM
Civil Dusk
9:28 PM
Southwest Pennyrile
Sunrise
6:38 AM
Sunset
8:57 PM
Civil Dawn
6:09 AM
Civil Dusk
9:26 PM
Barren River
Sunrise
6:34 AM
Sunset
8:53 PM
Civil Dawn
6:04 AM
Civil Dusk
9:23 PM
Louisville Metro
Sunrise
6:28 AM
Sunset
8:54 PM
Civil Dawn
5:57 AM
Civil Dusk
9:24 PM
Lincoln Trail
Sunrise
6:30 AM
Sunset
8:53 PM
Civil Dawn
6:00 AM
Civil Dusk
9:22 PM
Lake Cumberland
Sunrise
6:26 AM
Sunset
8:46 PM
Civil Dawn
5:56 AM
Civil Dusk
9:16 PM
Northern Kentucky
Sunrise
6:21 AM
Sunset
8:51 PM
Civil Dawn
5:50 AM
Civil Dusk
9:22 PM
Inner Bluegrass
Sunrise
6:23 AM
Sunset
8:48 PM
Civil Dawn
5:53 AM
Civil Dusk
9:18 PM
Bluegrass Foothills
Sunrise
6:23 AM
Sunset
8:46 PM
Civil Dawn
5:53 AM
Civil Dusk
9:16 PM
Northeast Kentucky
Sunrise
6:15 AM
Sunset
8:42 PM
Civil Dawn
5:44 AM
Civil Dusk
9:12 PM
Southeast Kentucky
Sunrise
6:20 AM
Sunset
8:41 PM
Civil Dawn
5:50 AM
Civil Dusk
9:10 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.