From Quiet Skies to Storm Chances: What I’m Watching!

We’ve squeezed just about everything we can out of this quiet stretch of weather.

Warm afternoons, comfortable humidity, and sunshine have been the story and honestly, it’s been a great run.

But the atmosphere is starting to shift behind the scenes. Moisture is increasing, the upper pattern is flattening, and disturbances are beginning to move in from the west.

That transition sets the stage for our next round of showers and storms from Friday through Monday, with lingering effects into Tuesday.

Let’s walk through it step-by-step.

FRIDAY: A WEAKENING SYSTEM MOVES IN

By Friday, a weakening cold front approaches from the west. This system starts off stronger across the Plains, but as it moves into Tennessee, it begins to lose organization.

And that’s key.

The Setup:

• Instability (CAPE): ~400–800 J/kg during the day

• Wind Shear: ~20–25 knots

• Lapse Rates: Poor

That’s not a favorable environment for widespread severe weather.

What That Means:

Storms will be:

• Scattered

• Disorganized

• Hit-or-miss

Could a storm briefly pulse up? Sure.

Main Concerns:

• Gusty winds

• Small hail

But overall: Severe threat is very LOW

FRIDAY NIGHT - SATURDAY MORNING: BEST RAIN CHANCE

As we head into Friday night, a shortwave moves overhead. That’s basically a pocket of energy that helps lift the atmosphere.

More lift = more rain coverage.

What to Expect:

• Showers with embedded thunderstorms

• More widespread than during the day

• Brief heavier downpours possible

  
  

Rainfall:

• Generally, 0.25" to 0.50"

• Locally higher spots possible

Good rain—but not a washout.

I know we have Nashville Rock n Roll Marathon in the Morning, then Square Fest in Gallatin. I would take a rain jacket/ umbrella just to be safe.

SATURDAY: LESS ORGANIZED, LOWER IMPACT

By Saturday, the main energy shifts east of us.

You might see:

• Lingering showers in the morning

• A few isolated storms in the afternoon

But the atmosphere just doesn’t have the support to organize storms well.

Translation:

• Coverage: Lower

• Intensity: Low

• Timing: Still messy (don’t try to pin it down too exact)

  
  

SUNDAY: A BREAK

A shortwave ridge builds in.

What that means:

• Drier conditions

• Quieter weather

• Highs in the upper 70s to low 80s

Enjoy it, we’ll need it.

⚠️ MONDAY: THE SYSTEM TO WATCH

This is where things get more interesting.

A stronger, more organized system develops as a negatively tilted trough lifts out of the Four Corners region. That helps deepen a surface low and push a cold front toward Middle Tennessee.

Now we start seeing better ingredients come together.

The Setup (Monday)

• CAPE: (Storm fuel)

  • Up to ~1500 J/kg northwest

  • ~500 J/kg around Nashville and us (The lower the better)

• Bulk Shear:

  40–60 knots

• 0–3 km Helicity:

  250–350

That’s a much more supportive environment for organized storms.

What This Means

Even though instability may be decreasing slightly as storms move in:

There is still plenty of energy + strong wind shear

That combination supports:

• Organized storm structures

• Strong to severe storms

Possible Hazards (Monday)

At this point:

All hazards are on the table

• Damaging winds

• Large hail

• Tornado potential

  
  

Now—before anyone runs with that…

Important:

This is still a few days out.

Timing, storm mode, and placement of the strongest ingredients WILL change.

But:

This is the day to keep a closer eye on.

Let’s Talk About The Model Data

Looking at the latest GFS guidance:

• Instability is moderate at best

• Wind profiles show some curvature, but not extreme early on

• The better overlap of ingredients improves into Monday

Translation:

• Friday/Saturday = messy, low-end

• Monday = more organized potential

Summary:

• Today = warm, quiet, enjoy it

• Friday = scattered storms, low severe risk

• Friday night → Saturday = best rain chances

• Sunday = break

• Monday = stronger system, something to watch

• Tuesday = lingering showers, then improving

Severe weather season is here, that’s just reality in Tennessee.

But right now: We’re not looking at a high-end outbreak for us. We ARE looking at an active pattern

And yeah… This might not be the last system we deal with either during this severe weather season.

But let’s not get ahead of ourselves.

We’ll take this one step at a time, Friday through Tuesday first.

Remember to follow Reliable, Trusted, and Degreed Meteorologists. There's a lot of craziness on all social media platforms.... It will drive up your storm anxiety and we DON'T want that!

I'll be here every step of the way!

Stay Weather Aware. Not Alarmed.