What is MVFR?

[[email protected]]

I am not a pilot and saw this chart for current flight
rules. What does MVFR stand for? Thanks.

KM

http://www.wunderground.com/US/Region/US/2xFlight.html

[Peter R.]

) wrote:

>
> I am not a pilot and saw this chart for current flight
> rules. What does MVFR stand for? Thanks.

Marginal VFR. The yellow caution light between IFR and VFR. :)

--
Peter

[[email protected]]

"Peter R." wrote:
>
> ) wrote:
>
> >
> > I am not a pilot and saw this chart for current flight
> > rules. What does MVFR stand for? Thanks.
>
> Marginal VFR. The yellow caution light between IFR and VFR. :)
>
> --
> Peter

Thanks!

[Peter R.]

) wrote:

> "Peter R." wrote:
> >
> > ) wrote:
> >
> > >
> > > I am not a pilot and saw this chart for current flight
> > > rules. What does MVFR stand for? Thanks.
> >
> > Marginal VFR. The yellow caution light between IFR and VFR. :)
> >
> > --
> > Peter
>
> Thanks!

You're welcome, but on a second reading of your post I see that I may
have omitted a few points.

IFR and VFR are the two sets of flight rules that define both a pilot's
and air traffic controller's legal responsibilities in specific
visibility and ceiling conditions for specific airspaces.

However, the acronyms IFR, VFR, MVFR, and LIFR, also are used to
categorize the visibility and ceiling conditions at weather reporting
stations. In other words, these acronyms are a sort of shorthand to
quickly describe weather conditions.

MVFR conditions exist when visibility is three-to-five miles and/or the
ceiling is between 1,000 to 3,000 feet AGL.

Here is a good chart that breaks down these categories of weather
conditions you are likely to see on an aviation weather chart:

http://adds.aviationweather.noaa.gov/metars/description_ifr.php

--
Peter

[Peter R.]

Peter R. ) wrote:

> IFR and VFR are the two sets of flight rules that define both a pilot's
> and air traffic controller's legal responsibilities in specific
> visibility and ceiling conditions for specific airspaces.

Sheesh, I should have included the disclaimer that this only applies to
the US. There might be other types of flight rules in other countries,
of which I don't know.

--
Peter

[G Farris]

Of course, as others here will probably mention, it is incorrect to add
adjectives and qualifications to the acronyms VFR and IFR. These, as Peter
states, are two different sets of operating rules, and it must always be
perfectly clear which one applies at any moment in flying. It's one or
the other - no "marginal" "low" or anything else. The acronyms used to
describe conditions (as opposed to flight rules) are VMC and IMC, visual or
instrument Meteorological Conditions.

The only exception is SVFR - for "Special" VFR, which is correct because it
actualy refers to a specific set of operating rules for pilots and controlers.

All of us probably confuse and abuse sometimes, and it's no crime to say
conditions are VFR, IFR or marginal VFR - but in practice there is no room for
ambiguity. We're expected to know the rules and adhere to them.

G Faris

[J Hansen]

(G Farris) wrote in message >...
> Of course, as others here will probably mention, it is incorrect to add
> adjectives and qualifications to the acronyms VFR and IFR. These, as Peter
> states, are two different sets of operating rules, and it must always be
> perfectly clear which one applies at any moment in flying. It's one or
> the other - no "marginal" "low" or anything else. The acronyms used to
> describe conditions (as opposed to flight rules) are VMC and IMC, visual or
> instrument Meteorological Conditions.
>

Well I guess we had better contact the National Weather Service and
tell them to stop using LIFR, IFR, MVFR and VFR to describe weather
conditions on area forecasts then.

[Scott Skylane]

G Farris wrote:
/snip/
> All of us probably confuse and abuse sometimes, and it's no crime to say
> conditions are VFR, IFR or marginal VFR - but in practice there is no room for
> ambiguity. We're expected to know the rules and adhere to them.
>
> G Faris
>

We are also expected to be familiar with the National Weather Service
and it's means of conveying information on the weather as it relates to
flying.

see http://aawu.arh.noaa.gov/fcstgraphics/ifrLegend.gif

Happy Flying!
Scott Skylane

[Bob Harrington]

wrote:
> I am not a pilot and saw this chart for current flight
> rules. What does MVFR stand for? Thanks.
>
> KM
>
> http://www.wunderground.com/US/Region/US/2xFlight.html

Marginal Visual Flight Rules - weather that is not bad enough to require
pilots to use cockpit instruments, but worse than fair weather VFR
conditions. Ferzample, a high cloud base with light rain or haze that
limits visibilty to some extent, but not so much as to preclude a pilot
finding his/her way by the ol' Mk.I eyeball.

More at:
http://adds.aviationweather.noaa.gov/metars/description_ifr.php
http://www.srh.noaa.gov/elp/aviation/pilot.shtml

Bob ^,,^

[Bob Harrington]

Scott Skylane wrote:

> Happy Flying!

Almost there - just need the flight training, an airplane, and eyes that
work better than these... X^}

But happy to play cargo anytime!

Bob ^,,^
http://bobqat.com

[Bob Harrington]

I ~really~ need to learn to finish a thread before staggering in... =}

Bob ^,,^

Bob Harrington wrote:
> wrote:
>> I am not a pilot and saw this chart for current flight
>> rules. What does MVFR stand for? Thanks.
>>
>> KM
>>
>> http://www.wunderground.com/US/Region/US/2xFlight.html
>
> Marginal Visual Flight Rules - weather that is not bad enough to
> require pilots to use cockpit instruments, but worse than fair
> weather VFR conditions. Ferzample, a high cloud base with light rain
> or haze that limits visibilty to some extent, but not so much as to
> preclude a pilot finding his/her way by the ol' Mk.I eyeball.
>
> More at:
> http://adds.aviationweather.noaa.gov/metars/description_ifr.php
> http://www.srh.noaa.gov/elp/aviation/pilot.shtml
>
> Bob ^,,^