Az előrejelzés rossz.

In Hungarian, the verb to be is usually left out in the present tense, third person when you are simply saying that something is something or is some way.

So:

• Az előrejelzés rossz. = The forecast is bad.

But in other persons, Hungarian does use the verb:

• Én rossz vagyok. = I am bad.
• Te rossz vagy. = You are bad.

And in the past or future, van/volt/lesz appears as needed:

• Az előrejelzés rossz volt. = The forecast was bad.

Hungarian has two forms of the definite article:

• a
• az

Which one you use depends on the sound that follows:

• a before a consonant sound
• az before a vowel sound

Since előrejelzés begins with the vowel e/elő..., you say:

• az előrejelzés

Compare:

• a ház = the house
• az autó = the car

This is similar to English a/an.

Yes. Előrejelzés is a compound/derived noun meaning forecast, prediction, or projection, depending on context.

It can be understood in parts:

• előre = ahead, in advance, beforehand
• jelez = to signal, indicate, predict
• -és / -zés = a noun-forming ending, often like English -ing or -tion

So előrejelzés literally suggests something like fore-signalling or predicting.

In everyday use, it commonly means:

• weather forecast
• prediction
• forecast in a general sense

A rough pronunciation guide is:

• eh-luh-reh-yehl-zays

A few important points:

• e is like e in met
• ő is a long rounded vowel that English does not really have
• j is pronounced like English y
• zs sounds like the s in measure
• sz sounds like English s

Stress in Hungarian is always on the first syllable, so:

• ELŐrejelzés

Even in long words, the first syllable gets the main stress.

Rossz is pronounced roughly like:

• ross

But note the spelling carefully:

• Hungarian sz = English s
• Hungarian s = English sh

So:

• rossz sounds with an s sound at the end, not sh

It is roughly ross, with a short vowel and a strong final s.

Here rossz is not directly modifying the noun inside a noun phrase. It is the predicate adjective: it tells you what the subject is like.

So the structure is:

• Az előrejelzés = the forecast
• rossz = bad

Together: The forecast is bad.

When an adjective comes before a noun, it usually directly modifies it:

• a rossz előrejelzés = the bad forecast

When it comes after the noun in a sentence like this, it functions like English is bad:

• Az előrejelzés rossz. = The forecast is bad.

Yes. That is perfectly natural.

Both mean basically the same thing:

• Az előrejelzés rossz.
• Rossz az előrejelzés.

The difference is mostly focus and emphasis.

• Az előrejelzés rossz. = neutral statement
• Rossz az előrejelzés. = emphasis on bad

The second version can sound a bit more like:

• The forecast is bad
• It’s the forecast that’s bad
• Bad is what the forecast is

Hungarian word order is often influenced by information structure rather than a fixed English-like pattern.

Normally, for this meaning, you would say:

• Az előrejelzés rossz.

Leaving out the article usually sounds unnatural here.

Hungarian often uses the definite article where English does, and also in some places where English might not. Since we are talking about the forecast as a known thing, az is the normal choice.

Without the article, Előrejelzés rossz would sound incomplete or unnatural in standard usage.

Hungarian adjectives usually do not agree in number with the noun when they are used attributively before a noun:

• a rossz előrejelzés = the bad forecast
• a rossz előrejelzések = the bad forecasts

Notice that rossz stays the same there.

But when the adjective is a predicate and the subject is plural, the adjective often takes the plural marker:

• Az előrejelzés rossz. = The forecast is bad.
• Az előrejelzések rosszak. = The forecasts are bad.

So in your sentence, singular előrejelzés matches singular rossz in predicate use.

The plural would be:

• Az előrejelzések rosszak.

Changes:

• előrejelzés → előrejelzések = forecasts
• rossz → rosszak = bad (plural predicate adjective)

So:

• Az előrejelzés rossz. = The forecast is bad.
• Az előrejelzések rosszak. = The forecasts are bad.

You would say:

• Az előrejelzés nem rossz.

The word nem is the usual negation word meaning not.

Pattern:

• Az előrejelzés rossz. = The forecast is bad.
• Az előrejelzés nem rossz. = The forecast is not bad.

In sentences like this, nem normally comes directly before the part being negated.

Előrejelzés is a general word for forecast or prediction. It can be used for:

• weather forecast
• economic forecast
• traffic forecast
• general prediction

If the context is weather, Hungarian speakers often understand it that way automatically. But the word itself is not limited to weather.

For example:

• időjárás-előrejelzés = weather forecast
• gazdasági előrejelzés = economic forecast

So Az előrejelzés rossz could mean The forecast is bad in several contexts.

It is in the nominative form, which is the basic dictionary form of the noun.

Here it is the subject of the sentence:

• Az előrejelzés = the forecast
• rossz = bad

There is no extra case ending because the noun is not functioning as an object or showing location, direction, possession, and so on.

So this is the plain base form:

• előrejelzés

Yes, very much. In Hungarian, accents are not optional: they are part of the spelling and change pronunciation.

Important vowels here include:

• e
• é
• ő

For example:

• előrejelzés has both ő and é
• jelzes would be misspelled
• elorejelzes is not correct standard Hungarian spelling

Hungarian vowel length and quality matter, so it is important to learn the accented forms accurately.