Harry Potter Storm Calcs

Just *two* Dementors were able to cause storm clouds to cover the sky in mere seconds.

As usual, will be using 20 km visibility and minimum cloud thickness of 8000 meters for Cumulonimbus clouds.

Distance: 20 km= 20,000 m

Volume= 3.14 x 20000^2 x 8000= 10048000000000 m^3

Using Condensation(2264705 J/kg) because Dementors have a freezing aura rather than any type of weather manipulation, which I assume they used in this scene. So, I have to use water density in these clouds, which is 1-3 g/m^3, using 2 g/m^3 as a middle end.

10048000000000 x 2= 20096000000000 g= 20096000000 kg

20096000000 x 2264705= 45511511680000000 J= 10.877512351816443726 Megatons of TNT(City Level) for two Dementors, Which means...

**5.4387561759082 Megatons of TNT(Small City+ Level)** per Dementor

## Fantastic Beasts And Where To Find Them(2016)

Frank the Thunderbird has three storm feats to his name. One is from a deleted scene, but should still be considered canon as it's still featured in the Original Screenplay by Rowling.

### Frank Dispels The First Storm:

https://youtu.be/JHVrs0jWJgw

Frank dispels a storm he created prior inside his habitat, one of the many pocket dimensions inside Newt's Suitcase, designed to house various magical creatures.

These pocket dimensions vary in size and habitat depending on what creature needs. Frank's habitat is one of the biggest we have seen, as we can see the center of the storm far off distance, Graphorns also seem to have a similar habitat in regards to size, with both habitats seeming to extend to the the horizon.

I'll be assuming the horizon as the radius and shape of a semicircle prism as the habitat seems to stop at Frank's perch.

As usual, will be using 20 km visibility and minimum cloud thickness of 8000 meters for Cumulonimbus clouds.

r= 20 km= 20000 m

h= 8000 m

Volume= 5.02654825E+12 m^3

The density of the water and air in the cloud together is approximately 1.003 kg/m3.

Mass= (5.02654825x10^12) x 1.003= 5041627894750 kg

Assuming it was dispelled omnidirectionally, as we see that clouds clustering towards the center of the habitat:

Kinetic Energy =  1/12 \* cloud mass \* (Speed of cloud movement)^2

It took around 8 seconds between Frank starting to descend and the rain stopping.

Speed= 20000/8= 2500 m/s

1/12 x (5041627894750) x 2500^2= 2.625847861849E+18 J= **627.5927012067399025 Megatons of TNT(Mountain+ Level)**

### Creation Of The Second Storm:

https://youtu.be/FGtrqEEsgYw

Using the same results from the last calc, for the mass of the storm, as the habitat is the same.

Mass= 5041627894750 kg

Assuming it was spreading forward, as we can see the clouds clustering in that way.

Kinetic Energy= 0.5 \* cloud mass \* (Speed of cloud movement)^2

It took around 4.5 seconds to spread, when you take it into account that lightning was flashing into Jacob's face...

Speed= 20000/4.5= 4444.4444444444 m/s

0.5 x 5041627894750 x 4444.4444444444^2= 4.9793855750616E+19= **11.901017148.808795929 Gigatons of TNT(Island Level)**

### The Storm Over New York:

https://youtu.be/KtVvjqkvw7o

Yes, the entire city, which has a land area of 783.8 km^2. And as I have mentioned before, this feat is how we know he uses kinetic energy to spread his storms.

783.8 km^2= 783800000 m^2

Assuming minimum cloud thickness of 8000 meters for Cumulonimbus clouds. The density of the water and air in the cloud together is approximately 1.003 kg/m3.

Volume= 783800000 x 8000= 6270400000000 m^2

Mass= 6270400000000 x 1.003= 6289211200000 kg

As we can see from the older shots, the sky was clear before Frank started to gather the clouds and it took around 11 seconds before it began to rain with the "shockwave" dispelling. The longest distance between the city's boundaries, from the northeast to the southwest, is about 35 miles.

35 miles= 56.327 km= 56327 m

Speed= 56327/11= 5120.6363636364 m/s

Assuming it was spread omnidirectionally, considering the "shockwave" of energy:

Kinetic Energy = 0.25 \* cloud mass \* (Speed of cloud movement)^2

0.25 x 6289211200000 x 5120.6363636364^2= 4.122722085383E+19 J= **9.8535422690798282623 Gigatons of TNT(Island Level)**

## Games

"These sources are where J. K. Rowling or Warner Bros. (the makers of the Harry Potter films and her primary licensee) licenced the use of elements of the Harry Potter universe to a third-party."

Also known as "Tier Three" or "soft" canon.

### Prisoner of Azkaban GBA Game:

https://youtu.be/hAmBskHd5jM?t=333

In the Game Boy Advance version of the video game adaptation of *Harry Potter and the Prisoner of Azkaban*, Tempest Jinx can be cast by using Chocolate Frog Card combinations.

Considering we see powerful winds but no evidence of KE being used, strong instability CAPE for a standard storm would be our safest bet, which would translate to...

2.16E+16 J= **5.1625239005736140534 Megatons of TNT(Small City+ Level)**

### Wonderbook: Book of Spells:

#### A Wizard Calls Down A “Great Storm:”

https://youtu.be/bsuo7ZeE3Bw?list=PLfEvER8C\_veDO\_Glh8HEUiz3gOCZdgivN&t=301

Considering we don't see how it gets created but that it's called a "great storm," strong instability CAPE for a standard storm would be our safest bet, which would translate to...

2.16E+16 J= **5.1625239005736140534 Megatons of TNT(Small City+ Level)**

#### Another Wizard Blows It Away With A Cyclone:

https://youtu.be/bsuo7ZeE3Bw?t=318

...Which blew away the storm, but took with it the judges, most of the crowd and many trees.

Assuming we use a standard storm...

Volume= 5421709348262.685 kg

Using the minimum speed of a F5 Tornado for this, as it's effects match what's told here the best...

Speed= 419 km/h

KE= 3.6722255678428E+16 J= **8.7768297510583177209 Megatons of TNT(City Level)**

### Hogwarts Mystery:

#### "Christmas At The Burrow:"

https://youtu.be/QMpLp5AvFYc?t=786

"Jacob's Sibling" tries to make it snow from Hogwarts all the way to the Burrow, only to create a blizzard at Hogwarts, "having increased the volume instead of distance." So, I shall be assuming the results of this calc would be the same if the spell worked as intended.

Hogwarts was located in the Scottish Highlands, near the all-wizard village of Hogsmeade and "not far" from Dufftown, in Moray, and Achintee, in Lochaber. The Burrow was the family home of the Weasley family, located on the outskirts of Ottery St Catchpole in Devon, England. The name is most likely a reference to the real Devon town of Ottery St Mary. Ottery St Mary is near Exeter, the city where Rowling went to university, so it is plausible that she visited it, or at least had heard of it.

Distance From Dufftown To Ottery St Mary= 615 miles= 989747 m

r= 494873.5 m

For this final method we need to calculate the temperature change made at the surface, below the storm. The average temperature between 0 meters (Sea level) and 2000 m and the average density of air is 1.112 kg/m^3...

Mass = (3.14 x(494873.5)^2x2000)x1.112 = 1.7102233346599E+15 kg

C = 1000 J/kg x K

Considering the spell "Jacob's Sibling" used is an amplified version of Snowflake-making Spell, I using temperature change would be our safest bet.

A severe blizzard has winds of over 72 km (45 miles) per hour, visibility near zero, and temperatures of −12 °C (10 °F) or lower.

Scotland weather January average temperature is 3.5°C

3.5°C= 276.65 K

−12 °C= 285.15 K

ΔΤ = T(Initial) - T(Final) = 276.65-285.15= -8.5

Q = M x C x ΔΤ

Q = (1.7102233346599x10^15) x 1000 x 20.5= 1.4023831344211E+20 J= **8.3794403347 Gigatons of TNT(Island Level)**

...And they did it in their Second Year!?

#### "Eye Of The Storm" And The Interaction's Storms:

https://youtu.be/yWmwPhxLudA?t=997

"Jacob's Sibling" and Holly Blackbird fly into a storm to stop the Thunderbird creating it. They reach a high enough altitude that the moon is semi-visible, meaning that they are likely at the top of the cloud cover. Despite that, the storm seems to be extending beyond the horizon. This is supported by the Thunderbird interaction...

https://youtu.be/yWmwPhxLudA?t=1655

...Where the Thunderbird flies around the same height and briefly manifests a storm.

"In temperate areas, the base of the cumulus clouds is usually below 550 metres (1,800 ft) above ground level, but it can range up to 2,400 metres (7,900 ft) in altitude. In arid and mountainous areas, the cloud base can be in excess of 6,100 metres (20,000 ft)."

Considering where Hogwarts is located in, 6100 meters is likely the most accurate choice and adding the height of Cumulonimbus clouds, gives us...

8000+6100= 14100 m height

Using Distance to the Horizon Calculator, gives us...

r= 424.3 km= 424300 m

Assuming minimum cloud thickness of 8000 meters for Cumulonimbus clouds. The density of the water and air in the cloud together is approximately 1.003 kg/m3.

h= 8000 m

Volume= 4.52465972E+15 m^3

Mass= (4.52465972x10^15) x 1.003= 4.53823369916E+15

Considering we didn't see the storm get formed or dispelled in the "Eye Of The Storm" and the one in the interaction suddenly appeared, I think it would be for the best if we used CAPE.

Assuming moderate instability for this, as the storm wasn't weak but not strong or anything special either...

(4.53823369916x10^15) x 2500= 1.13455842479E+19 J= **2.711659715.0812621117 Gigatons of TNT(Large Mountain+ Level)**

### Magic Awakened:

#### "Fantastic Beasts Investigation" Event Trailer's Storm:

https://youtu.be/mRMdKz7yMJE?t=35

A Thunderbird creates a storm in the middle of a desert.

As usual, will be using 20 km visibility and minimum cloud thickness of 8000 meters for Cumulonimbus clouds.

Distance: 20 km= 20,000 m

Volume= 3.14 x 20000^2 x 8000= 10048000000000 m^3

The density of the water and air in the cloud together is approximately 1.003 kg/m3.

Mass= 10048000000000 x 1.003= 10078144000000 kg

It seems exactly the same as how Frank created his storm, so will be using the same method.

Kinetic Energy = 0.25 \* cloud mass \* (Speed of cloud movement)^2

It took around 4 seconds for the storm to form.

Speed= 20000/4= 5000 m/s

0.25 x 10078144000000 x 5000^2= 6.29884E+19 J= **15.054588910.133842468 Gigatons of TNT(Island Level)**

### **Hogwarts Legacy:**

#### Prof. Rackham Creates A Storm:

https://youtu.be/\_mc7QA2gnu4?t=198

The location where he creates the storm is a hill in Feldcroft, a hamlet where we can explore in the game and isn't that far away from Hogwarts itself.

Hogwarts was located in the Scottish Highlands, near the all-wizard village of Hogsmeade and "not far" from Dufftown, in Moray, and Achintee, in Lochaber.

Considering he is standing on hill capable of overseeing the sea, using Dufftown's elevation should be appropriate.

Dufftown's Elevation: 198 m

Using Distance to the Horizon Calculator, gives us...

r= 50.3 km= 50300 m

The storm seems to be created through condensation(2264705 J/kg), as clouds just materialize and there is no wind that wasn't there before.

Minimum cloud thickness of 8000 meters for Cumulonimbus clouds and they have a liquid water content of 1 to 3 or 2 g/m^3 on average.

Volume= 3.14 x 50300^2 x 8000= 63555860800000 m^3

Mass= 63555860800000 x 2= 127111721600000 g= 127111721600 kg

127111721600 x 2264705= 287870551466128000 J= **68.80271.065518170595 Megatons of TNT(City+ Level)**

#### The Keepers Dispel The Said Storm:

https://youtu.be/\_mc7QA2gnu4?t=223

All four Keepers, dispel the storm once they no longer have a need of it, while adding in some finishing touches to Percival's work.

Volume= 63555860800000 m^3

The density of the water and air in the cloud together is approximately 1.003 kg/m3.

Mass= 63555860800000 x 1.003= 63746528382400 kg

It took 4 seconds for all clouds to fade into the horizon.

Speed= 50300/4= 12575 m/s

Assuming it was spread omnidirectionally, as we see clouds from all directions fade away.

Kinetic Energy = 0.25 \* cloud mass \* (Speed of cloud movement)^2

0.25 x 63746528382400 x (12575)^2= 2.5200695936723E+21 J= **602.31108835380018718 Gigatons of TNT(Large Island+ Level)**

Considering all four have been portrayed to be comparable in power and all of them were doing it while multi-tasking, the total result should scale for all four individually.

Not only that, Isidora, while amped by her Repositories, was match two of the keepers in a beam struggle and was implied to be able to prevail over three as Prof.Bakar saw it fit to cast the killing curse on her, after he wasn't able to wake up Prof. Fitzgerald from the blow Isidora dealt to her. This scaling could roughly be used for all top tiers of the verse, who have similar or superior feats of magic/duelling.