Ask the IFR Expert: How Should I Adjust My Personal Minimums for Winter IFR Flying

Winter IFR flying adds layers of complexity that don’t exist in warmer months—icing potential, contaminated runways, harsh terrain, and fewer good weather alternates. With those factors in mind, there are some key areas in which an instrument-rated pilot should rethink and adjust personal minimums for winter operations.

Most pilots think of personal minimums as static numbers, but winter is a reminder that they should be dynamic. Rather than simply raising ceilings and visibility across the board, start by identifying the risks winter uniquely adds—and then build buffers around them.

Weather margins:

Increase ceiling and visibility minimums at both the destination and alternate. Marginal IFR that might be acceptable in July can feel very different when freezing levels are low.

Icing tolerance:

Be honest about your aircraft’s capabilities and your own experience. If ice is possible, your plan should already include exit strategies—altitudes, routes, or alternates that keep risks to a minimum.

Fuel reserves:

Winter IFR often means reroutes and altitude changes. Add extra fuel beyond legal minimums to account for deviations around weather or unexpected delays.

Runway and braking considerations:

A long, dry runway in summer may become marginal when contaminated. Raise minimum runway length requirements and be cautious with tailwinds or crosswinds on winter days.

Pilot readiness:

Cold, stress, and reduced daylight all affect performance. If you haven’t flown IFR recently—or haven’t done so in winter conditions—tighten minimums until proficiency catches up.

 

Winter IFR isn’t about avoiding flying altogether, after all, personal flying is all about utility and enjoyment. But you should consider adjusting minimums and reducing the margin for surprises.

Instrument Maneuver Spotlight: Circling Approach Procedure

Welcome to the latest edition of the Instrument Maneuver Spotlight series. In each installment, we focus on a specific maneuver you’ll practice during instrument training—and one you’ll be expected to demonstrate confidently on your checkride.

Few instrument maneuvers require a smoother transition from procedures to judgment than the circling approach. In this spotlight, we’ll break down how to fly a circling approach safely and within standards—maintaining the correct circling altitude, managing wind and aircraft positioning, staying within protected airspace, and knowing exactly when it’s appropriate to leave MDA and descend for landing.

circling approach

Each maneuver is part of Sporty’s Instrument Rating Course and includes a narrated video animation, along with step-by-step instructions that include performance standards and common errors. Study them while on the ground or print them for quick reference in the airplane.

instrument course

 

 

 

Practical IFR: Departure Alternates

departure

A departure alternate is an airport and approach you’ll fly if trouble finds you seconds after you enter the clouds.

Maybe it’s just that I don’t like to think on the fly, but I’m a huge fan of pre-loaded decisions. One of these is the departure alternate for IFR.

A departure alternate is an airport and approach you’ll fly if trouble finds you seconds after you enter the clouds. These are required for many commercial operations if the conditions make an IFR return to the departure airport unlikely or impossible. They’re not required for GA, but you should consider making them part of your standard IFR planning whenever ceilings preclude a VFR return.

Returning to your departure field isn’t always the fastest option, even if an approach to that airport is an option. Once you’re in the clouds, you’ll need an instrument approach or vectors below the clouds to land. Returning to your departure might require overflying before a second-course reversal to start heading back down. That’s a long time with a problem aircraft. Because airports are often aligned on similar headings in a given area, it may be fastest to continue flying straight ahead and join the final approach course for an airport ahead of you rather than do an about-face.

If it’s a toss-up, consider which airport has the better maintenance services, fire, and rescue, or simplest, surest instrument approach. That’s your departure alternate. If the best choice is an instrument return, great. You just left there so you’ll have most of the frequencies ready to go.

No matter what, it’s best to have that airport selected and the approach you’ll want, ready and briefed. Load the navaid frequencies and the approach directly into your navigator if you can. You’re flying a departure, so the approach part of your flight plan is probably free. You can delete it at your leisure when you’re enroute with everything humming nicely. If nothing else, you can probably set up an ILS frequency into your navigator when you’re using GPS for navigation on departure.

It’s important to know what constitutes a VFR return for your area. Just because the airport is reporting ceilings of 1200 AGL doesn’t mean ATC can let you back down to 1200 if you have an issue. You might still need an instrument approach.

So consider the minimum vectoring altitude (MVA) for your area. If you don’t know it, ask the tower or an Approach controller before you depart. If ceilings are above MVA, you can get vectored down below the clouds from wherever you are when Murphy strikes and then get lined up for a visual landing at the airport. If not, expect an instrument approach and make a departure alternate plan.

Zero-Zero Departure

Take this thinking to its extreme and you’ve got the proverbial zero-zero departure. True “zero vis” is probably taking things too far because you can’t even see the runway well enough for a takeoff roll. But let’s consider going IMC immediately on rotation: insane or reasonable?

Transitioning to instruments prior to entering the clouds is a healthy habit, so for a near zero-zero takeoff, that means looking down at the AI while still on the ground and then pitching for a climb. The action isn’t that different from a normal takeoff with an airport near minimums, and once you’re 200 feet above the ground, it’s essentially the same as a go-around from minimums—except you’re already configured for the climb with a plan as to where you’re going. We don’t usually consider the go-around from minimums insanely risky, so why the below-minimums departure?

I think it’s more perceived risk than actual risk. My stand is that so long as you have a departure plan covering the fact that you can’t come back, this kind of departure is no more—or less—risky than any flight profile in low IFR.

Quick Poll

Quiz: IFR Weather Challenge

Smart IFR flying starts with strong weather awareness. Take the quiz to see how you measure up.

The Low-Level Significant Weather Prognostic Chart depicts weather conditions
The Low-Level Significant Weather Prognostic Chart depicts weather conditions
Correct! Wrong!
If a cold front advances over a mountainous area, what weather phenomenon would you expect to encounter?
If a cold front advances over a mountainous area, what weather phenomenon would you expect to encounter?
Correct! Wrong!
Pilots on IFR flights seeking ATC in flight weather avoidance assistance should keep in mind that
Pilots on IFR flights seeking ATC in flight weather avoidance assistance should keep in mind that
Correct! Wrong!
Fair weather cumulus clouds often indicate
Fair weather cumulus clouds often indicate
Correct! Wrong!
As a first step in planning an instrument cross-country in actual IFR conditions, you should:
As a first step in planning an instrument cross-country in actual IFR conditions, you should:
Correct! Wrong!
A pilot planning to depart at 1100Z on an IFR flight is particularly concerned about the hazard of icing. What sources reflect the most accurate information on icing conditions (current and forecast) at the time of departure?
A pilot planning to depart at 1100Z on an IFR flight is particularly concerned about the hazard of icing. What sources reflect the most accurate information on icing conditions (current and forecast) at the time of departure?
Correct! Wrong!
What type of weather conditions would you expect to encounter if you are advised that nimbostratus clouds will be present along your route of flight?
What type of weather conditions would you expect to encounter if you are advised that nimbostratus clouds will be present along your route of flight?
Correct! Wrong!
Which weather condition can be expected when moist air flows from a relatively warm surface to a colder surface?
Which weather condition can be expected when moist air flows from a relatively warm surface to a colder surface?
Correct! Wrong!
The 24-Hour Low-Level Significant Weather Prog at 18Z indicates that the eastern half of Wisconsin will likely experience:
The 24-Hour Low-Level Significant Weather Prog at 18Z indicates that the eastern half of Wisconsin will likely experience:
Correct! Wrong!
What type of weather can be expected in the red scalloped area near area 9?
What type of weather can be expected in the red scalloped area near area 9?
Correct! Wrong!

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IFR Weather Challenge You got out of 10 right!

instrument course

Fronts, Freezing Levels, and Staying Out of Trouble This Winter

If you’re anything like me, the holidays are basically the last window to get some flying in before winter shows up and icing becomes a constant headache. A lucky few out there have aircraft certified for flight into known icing…but for most of us, that’s not the case. Instead of boots or TKS doing the heavy lifting, we end up relying on smart weather planning and a solid understanding of where the trouble spots are.

ice

Instead of boots or TKS doing the heavy lifting, most of us rely on smart weather planning to avoid the winter weather hazards.

If you’re trying to squeeze in as much flying as you can this winter, there are a few things worth keeping in mind that can help keep you—and the people you care about—safe. One of my go-to tools this time of year is the Prog Chart section under Imagery in ForeFlight. The 6-, 12-, 18-, 24-, 36-, 48-, and 60-hour charts are especially helpful. Once you get used to reading them, they give you a sneak peek at how the big weather systems are lining up long before you see anything on radar.

prog charts

I’m also a big fan of keeping things simple. The KISS principle works wonders in winter flying: stick close to high-pressure systems whenever you can. Sure, you may still deal with some high winds or wind shear depending on what fronts are around, but those are much easier to accurately measure and use for a go/no-go decision based on your personal mins.

Now, if you live or fly in an area that gets cold, low clouds once winter hits, here’s a big tip: do your best to avoid frontal systems, especially warm fronts and occluded fronts. They’re the icing all-stars—and not in a good way.

prog chart

Here’s a quick, plain-English breakdown of what to watch for:


1. Warm Fronts: The Kings of Widespread Icing

Warm fronts are hands-down the biggest troublemakers when it comes to winter icing.

Why they’re bad:

  • Warm air slides over cold air and creates a nice, deep, soggy layer.

  • You get multiple cloud decks, all sitting in prime icing temps.

  • Icing can start 100 miles or more ahead of where the front actually is.

  • Freezing rain, drizzle, supercooled liquid droplets (SLD)—basically all the stuff we don’t want.


2. Occluded Fronts: The Deep, Layered Icing Machines

Occlusions basically mash together the worst parts of warm and cold fronts, and the result is a monster icing setup.

Why they’re bad:

  • You get warm-front overrunning and cold-front lift at the same time.

  • Cloud layers and precipitation can stack up 20,000 feet deep.

  • Icing usually spans a huge altitude range, making climb/descend options limited.


3. Cold Fronts: Short-Lived but Sneaky

Cold fronts aren’t as widespread as the other two, but don’t underestimate them.

Why they’re bad:

  • Strong lift can build clear ice in a hurry.

  • They move fast, so you can get caught between layers during climb or descent.

  • After the front passes, that “leftover” stratocumulus can hold supercooled droplets.


If you plan on flying as we continue into winter, be careful out there, monitor the ceilings and freezing levels, and stay ahead of problems by diving into those Prog Charts. Fly safe, and happy holidays!

Video Tip: Understanding Ice Protection Systems

In this IFR Focus video tip, we break down the major types of ice protection found on general aviation aircraft—from classic pneumatic boots to thermal systems and weeping wings—and explain the critical distinction between anti-ice and deice. Just as important, we look at what it actually means for an airplane to be approved for flight in known icing conditions, why equipment alone doesn’t guarantee certification, and why every pilot should think of these systems as an exit strategy, not a license to linger.

instrument course