@TLK Valentine , consider UFO sightings. I don't know how much you know about UFOs, but there is no question that there are many well-documented and unexplained sightings. The question is only "what is causing this UFO sighting?". Often these UFO sightings seem to defy physics.
Well, UFOs do exist... in the strictest sense of the word:
Unidentified Flying Object. Plenty of people have looked in the sky and said "what the heck was
that?!?" as something whizzed by.
(Fun fact: "manna" from heaven may have derived its name from the Aramaic question "man hu?" which means, "What is it?")
"UFOs" as in "little green men from Mars"? That, I'm skeptical about.
A species would have to be capable not only of interstellar travel, but of entering Earth's atmosphere completely undetected by multiple extensive satillite networks designed especially for spotting fast-moving objects entering our atmosphere at high speed (The United States has NORAD, Russia has the PBCH; pretty much every nation that doesn't want to ever get blindsided by an ICBM has
someone watching the skies 24/7).... only to be spotted by Farmer Bob on a country dirt road in the middle of the night?
Possible? Yes. Plausible? No so much.
As for "seeming to defy physics," that's more an issue of technology than physics per se... assuming that UFOs are extraterrestrials, they're flying F-35 Lightnings; humans are the Wright Brothers at Kitty Hawk. I'd expect them to do plenty that we haven't figured out yet.
...but I digress.
The difference I see between UFO sightings and miracles (such as parting the Red Sea) is the apparent purpose. Moses (with God's help) parted the Red Sea to escape Pharaoh and to show that God was stronger than the false gods of the Egyptians.
"False gods" is a late Jewish/Christian dismissal. There's evidence that the Early Hebrews were not necessarily monotheistic, but
monolatric -- they acknowledged the existence of other gods, but only worshiped One.
After all, Pharaoh's magicians were able to imitate not only Moses' "staff to snake" miracle, but the first two plagues... and if they had been faking it, wouldn't the Bible have said so? All it says is that the magicians used "their secret arts" which would indicate magic... and that magic had to come from somewhere, right? (and before you say "the Devil," remember that the ancient Hebrews didn't have one of those...)
...but I digress again.
With UFO sightings there often seems to be no obvious purpose.
Again, assuming the UFOs are in fact aliens, exploration would seem a plausible enough purpose... the fact that they are so often detected would indicate that 1. They're not very good at their job, or 2. there are a
lot of alien investigations of our planet, and we're only spotting the amateurs.
... but I digress again.
[So it seems to me that an extraordinary event that serves God's purpose is a miracle. There are varying degrees of extraordinary. Maybe a spontaneous phone call from one friend to another friend at just the right time to avert a suicide might be called a miracle even though no physical laws were broken.
Fair enough -- God can work through ways which, while highly improbable, can still appear to be possible through natural means: Winning the lottery, getting struck by lightning, the New York Jets winning the Super Bowl (ok, that last one is more Faustian than miraculous...

)
I'm referring only to those events in the Bible which
cannot be explained as "long odds" or "one-in-a-million lucky break." When God wanted people to
KNOW that He was there and that neither He nor His people are to be trifled with, He left no room for question. Part the Red Sea (and the Jordan River), Raise Lazarus from the dead after being buried for four days, stop the sun in the sky for a little more daylight to kill enemies under... we're at a whole new level of "extraordinary" there.
Those are the miracles I'm discussing.
Another thing to consider is that some of the classic miracles like parting the Red Sea can be imagined to be in conformance with physics. In the 1800s there were lots of people with an equal devotion to science and a literal understanding of Biblical miracles who tried to reconcile them.
I am aware of such reconciliation attempts. To the best of my knowledge, every such attempt at reconciliation with a
literal understanding of Biblical miracles failed.
I mentioned the Red Sea earlier; I don't mind restating it:
Take, for example, Moses at the Red Sea. Some Biblical scholars claim that this was actually at the "Sea of Reeds," the swampy marshland where the Suez Canal is now located. The idea is that Moses led the Israelites slowly and carefully through this swamp, but the pursuing Egyptian army, wearing full armor and riding iron chariots, got hopelessly bogged down. In short, a lucky break for the Israelites which grew more and more fantastic with each retelling.
On the other hand, if it happened as traditionally depicted, in all of Cecil B. DeMille's glory:
Then we've got a bona fide miracle.
Now, the "Sea of Reeds" version is plausible, and it would certainly reconcile our knowledge of physics, history, geography, etc., with the Biblical account... but it ain't "literal"; not by a long shot.