Forecast For

Saturday, June 20

Updated Jun 20, 7:18 AM EDT

Confidence

85%

Summary Regions Outcomes Battles Analysis Almanac Charts

Confidence

85%

Warm Saturday with Scattered Light Showers North and West

A weak and moisture-starved weather system will cross Kentucky this Saturday. Most regions will remain dry and warm with highs in the 80s, but light rain and morning drizzle will affect the Purchase, Northern Kentucky, and parts of the Southeast.

Why is this happening?

Technical explanation of the atmospheric setup

Confidence Assessment

High confidence in temperatures and the lack of severe weather; moderate confidence in the exact spatial coverage of light rainfall due to significant dry air in the lower atmosphere.

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Purchase Area

NUISANCE

Paducah, Murray, Mayfield

Morning Drizzle, Afternoon Sun

Rain

85°/ 65°

Expect a damp start to the day with light drizzle and low clouds. Conditions will improve by midday, with sun breaking through and temperatures reaching the mid-80s.

Precipitation60%

Wind3 mph / 7 mph

Wind Chill66°

Accumulation

The "Why"

Low-level saturation (925-850mb) coincides with morning isentropic lift. Drying mid-levels after 15z will scour out cloud cover.

Northwest Pennyrile

Owensboro, Henderson, Morganfield

Mainly Dry and Warm

Sunny

84°/ 65°

Most of the day will be sunny and warm. A stray shower cannot be ruled out late in the day, but impacts will be minimal.

Precipitation20%

Wind5 mph / 8 mph

Wind Chill66°

The "Why"

Subsidence behind the western shortwave will maintain a dry column through much of the afternoon.

Southwest Pennyrile

Hopkinsville, Madisonville, Princeton

Sunny and Pleasant Summer Day

Sunny

85°/ 64°

Enjoy a beautiful day with clear skies and warm temperatures. Highs will reach the mid-80s with light winds.

Precipitation< 10%

Wind4 mph / 10 mph

Wind Chill65°

The "Why"

Strong mid-level capping and a moisture deficit will prevent any cloud or precip development.

Barren River

Bowling Green, Glasgow, Franklin

Warm and Bright Afternoon

Sunny

83°/ 63°

Early clouds will give way to a mostly sunny afternoon. Temperatures will be very comfortable for outdoor activities.

Precipitation< 10%

Wind4 mph

Wind Chill64°

The "Why"

Surface high pressure to the south maintains light anticyclonic flow and dry air.

Louisville Metro

NUISANCE

Louisville, La Grange, Shepherdsville

Late Day Sprinkles Possible

Rain

84°/ 67°

A warm and mostly dry day is expected in the city. Increasing clouds by late afternoon may lead to a few light showers or sprinkles in the evening.

Precipitation40%

Wind8 mph

Wind Chill68°

Accumulation

The "Why"

A sagging surface trough arrives after 21z. Deep-layer moisture is marginal, leading to high-based light showers.

Lincoln Trail

Elizabethtown, Bardstown, Leitchfield

Dry with Scattered Clouds

Cloudy

81°/ 63°

Expect a mix of sun and clouds throughout the day. Temperatures will be seasonal, topping out in the low 80s.

Precipitation< 10%

Wind5 mph / 8 mph

Wind Chill64°

The "Why"

The northern trough will likely stall or dissipate before reaching the Muldraugh Escarpment.

Lake Cumberland

Somerset, Columbia, Monticello

Ideal Lake Weather

Cloudy

81°/ 60°

Partly cloudy skies and light winds will make for great conditions on the water. Temperatures will be pleasant in the low 80s.

Precipitation< 10%

Wind4 mph / 8 mph

Wind Chill61°

The "Why"

High pressure influence from the south maintains a dry column and prevents convective development.

Northern Kentucky

NUISANCE

Covington, Florence, Independence

Scattered Afternoon Showers

Rain

81°/ 62°

Clouds will increase through the morning with light showers arriving in the afternoon. Rainfall will be light and shouldn't cause major issues for outdoor plans.

Precipitation80%

Wind10 mph / 18 mph

Wind Chill63°

Accumulation

Rain

0.03"

The "Why"

This region has the best combination of trough-induced lift and low-level moisture.

Inner Bluegrass

NUISANCE

Lexington, Georgetown, Winchester

Breezy with a Few Sprinkles

Rain

81°/ 63°

A mostly cloudy and breezy day is in store. While a few light showers are possible in the afternoon, most areas will stay dry.

Precipitation40%

Wind10 mph

Wind Chill64°

Accumulation

The "Why"

Moderate dewpoint depressions will lead to a high virga risk, limiting actual measurable rain.

Bluegrass Foothills

Richmond, Danville, Berea

Mainly Cloudy and Mild

Cloudy

80°/ 60°

Expect more clouds than sun today, but rain should stay to your north. Temperatures will peak around 80 degrees.

Precipitation< 10%

Wind7 mph

Wind Chill61°

The "Why"

Low-level flow is too weak to provide significant orographic lift for precipitation.

Northeast Kentucky

NUISANCE

Ashland, Morehead, Grayson

Evening Showers Possible

Rain

82°/ 61°

Sun will mix with clouds through the afternoon. A few light showers are likely by evening as the northern trough slides through.

Precipitation60%

Wind9 mph / 15 mph

Wind Chill62°

Accumulation

Rain

0.02"

The "Why"

Vorticity max arrives late (00z), interacting with lingering valley moisture.

Southeast Kentucky

NUISANCE

Hazard, Pikeville, Harlan

Misty Morning, Warm Afternoon

Rain

81°/ 60°

Expect low clouds and mist early in the day with some light drizzle. Skies will brighten and temperatures will warm up nicely by the afternoon.

Precipitation50%

Wind5 mph / 10 mph

Wind Chill61°

Accumulation

The "Why"

Morning saturation trapped in valleys will dissipate as daytime heating scours out the inversion.

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 mid-level moisture recovers faster than modeled, light showers could become more widespread across Central Kentucky, and rainfall totals in the north could reach a tenth of an inch.

💨

The 'Bust' Scenario

If the pervasive mid-level dry air remains entrenched, any rain falling from the clouds will evaporate as virga, resulting in a completely dry day for the entire state.

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.

Northern Trough Timing

Models disagree on the arrival of light rain in Northern Kentucky. The Euro suggests a morning/afternoon event, while the GFS holds it off until the evening.

GFS

EURO

NAM

Why BLEND Wins

Given the lack of strong forcing, a blend accounts for the diffuse nature of the boundary, suggesting a broad window of scattered light showers from mid-afternoon through evening.

Affected Regions

NORTHERN KYLOUISVILLE METRONORTHEAST KY

The Morning Moisture Plume

The NAM is aggressive with a morning moisture plume and isentropic lift in the Purchase and Southeast regions, while the GFS and Euro keep these areas dry.

NAM

GFS

EURO

Why NAM Wins

The NAM's superior resolution of low-level moisture and isentropic lift on the 305K surface is typically more reliable for morning drizzle/mist scenarios in Kentucky's river valleys and coalfields.

Affected Regions

PURCHASESOUTHEAST COALFIELDS

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

A standard adiabatic lapse rate is present with a well-mixed boundary layer. Surface temperatures will reach the low-to-mid 80s, supported by 850mb temps around 17C.

Thermal Boundary

A diffuse surface trough is expected to sag across the Ohio River by mid-afternoon.

Diurnal Trend

Standard diurnal heating curve, though somewhat dampened in Northern Kentucky due to increasing cloud cover by afternoon.

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

No significant cold front; only a weak wind shift from SW to WNW associated with the trough passage in the north after 18z.

Jet Stream Support

The subtropical jet remains well south while a 100kt polar jet streak stays north of the Ohio River, leaving Kentucky in a region of neutral synoptic support.

Energy Status

Weak vorticity advection is confined to the northern tier of counties, providing just enough lift for light stratiform rain.

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 mostly dry at mid-levels. Low-level saturation below 850mb is present early in the west/east and late in the north. High virga risk exists in Central KY due to 15-20F dewpoint depressions.

Precipitation Character

Strictly stratiform light rain and drizzle. Zero CAPE ensures no lightning or convective bursts.

Flooding Context

No flooding risk; ground is dry and QPF is negligible (<0.05 inches).

Celestial Almanac

View NAM Analysis View GFS Analysis View ECMWF Analysis View GEM Analysis