This is storm VAE that was active in 1952 in the W. Pacific region with maximum winds of 161 km/h.

What was the maximum intensity of the storm?

Max Wind: 161 km/h. Min Pressure: hPa.

storm VAE (1952) - Track and intensity details

Name: storm VAE
Start: 1952-10-15
End: 1952-10-24
Location: W. Pacific

VAE (1952)

Storm Code: 1952289N15128 | Region: W. Pacific
Active from 15/10/1952 to 24/10/1952 (9 days)

120 km/h

1-min Wind (JTWC)

Level 12

161 km/h

10-min Wind (CMA)

Level 14

975 hPa

Min Pressure

3,549 km

Distance

Forecast Agencies

Agency	Max Intensity	Trajectory	Energy	highest_classification
WMO (International) (coordinates_only)	~	975	28	3,024	~	~	Undefined
JMA (Japan) (coordinates_only)	~	975	59	3,393	~	~	Undefined
CMA (China)	161	975	59	3,397	27.92	34.87	Level 14 - Violent Storm
TD9636 (coordinates_only)	~	~	61	3,549	~	~	Undefined
JTWC	120	~	49	2,740	22.84	22.55	Level 12 - Violent Storm
DS824	120	~	49	2,740	22.84	22.55	Level 12 - Violent Storm
TD9635	120	978	31	1,317	22.84	22.55	Level 12 - Violent Storm

Agency

Max Intensity

Trajectory

Energy

highest_classification

Max Wind (km/h)

Min Pressure (hPa)

Number of points

Distance (km)

ACE (10⁴ (km/h)²)

PDI (10⁶ (km/h)³)

WMO (International)
(coordinates_only)

975

3,024

Undefined

JMA (Japan)
(coordinates_only)

975

3,393

Undefined

CMA (China)

161

975

3,397

27.92

34.87

Level 14 - Violent Storm

TD9636
(coordinates_only)

3,549

Undefined

JTWC

120

2,740

22.84

22.55

Level 12 - Violent Storm

DS824

120

2,740

22.84

22.55

Level 12 - Violent Storm

TD9635

120

978

1,317

22.84

22.55

Level 12 - Violent Storm

Advanced Meteorological Indices by Agency Automatically calculated from raw data

WMO (International)

Pressure Variation
Max Pressure Drop/Step	-12 hPa
Max Pressure Drop/24h	-25 hPa	Strong
Max Pressure Rise/Step (weakening)	+9 hPa
Movement & Duration
Avg Movement Speed	18.7
Tracking Time	162h (6.8 days)
Peak Intensity & Range
Latitude	11.6°N – 15°N (3.4°)
Longitude	101.1°E – 128°E (26.9°)

JMA (Japan)

Pressure Variation
Max Pressure Drop/Step	-6 hPa
Max Pressure Drop/24h	-16 hPa
Max Pressure Rise/Step (weakening)	+5 hPa
Movement & Duration
Avg Movement Speed	19.5
Tracking Time	174h (7.3 days)
Peak Intensity & Range
Latitude	11.3°N – 15°N (3.7°)
Longitude	98°E – 128°E (30°)

CMA (China) RI

Energy
ACE (10⁴ (km/h)²)	27.92	High
PDI (10⁶ (km/h)³)	34.87
Intensification / Weakening
Max Wind Gain/Step	+19 km/h
Max Wind Gain/24h	+56 km/h	RI
Max Wind Loss/Step	-19 km/h
Pressure Variation
Max Pressure Drop/Step	-6 hPa
Max Pressure Drop/24h	-16 hPa
Max Pressure Rise/Step (weakening)	+5 hPa
Movement & Duration
Avg Movement Speed	19.5 km/h
Tracking Time	174h (7.3 days)
Time as TD+ (≥34kt)	138h (5.8d)
Time as Storm+ (≥64kt)	60h (2.5d)
Peak Intensity & Range
Peak Intensity	08:00 20/10/1952 11.6°N, 110.5°E
Latitude	11.3°N – 15°N (3.7°)
Longitude	98°E – 128°E (30°)

TD9636

Movement & Duration
Avg Movement Speed	19.7 km/h
Tracking Time	180h (7.5 days)
Peak Intensity & Range
Latitude	12.6°N – 19.6°N (7°)
Longitude	93.6°E – 122.9°E (29.3°)

JTWC

Energy
ACE (10⁴ (km/h)²)	22.84	High
PDI (10⁶ (km/h)³)	22.55
Intensification / Weakening
Max Wind Gain/Step	+6 km/h
Max Wind Gain/24h	+19 km/h
Max Wind Loss/Step	-15 km/h
Movement & Duration
Avg Movement Speed	19 km/h
Tracking Time	144h (6 days)
Time as TD+ (≥34kt)	156h (6.5d)
Time as Storm+ (≥64kt)	6h (0.3d)
Peak Intensity & Range
Peak Intensity	08:00 20/10/1952 11.8°N, 110.8°E
Latitude	11.3°N – 14.8°N (3.5°)
Longitude	95.8°E – 120°E (24.2°)

DS824

Energy
ACE (10⁴ (km/h)²)	22.84	High
PDI (10⁶ (km/h)³)	22.55
Intensification / Weakening
Max Wind Gain/Step	+6 km/h
Max Wind Gain/24h	+19 km/h
Max Wind Loss/Step	-15 km/h
Movement & Duration
Avg Movement Speed	19 km/h
Tracking Time	144h (6 days)
Time as TD+ (≥34kt)	156h (6.5d)
Time as Storm+ (≥64kt)	6h (0.3d)
Peak Intensity & Range
Peak Intensity	08:00 20/10/1952 11.8°N, 110.8°E
Latitude	11.3°N – 14.8°N (3.5°)
Longitude	95.8°E – 120°E (24.2°)

TD9635

Energy
ACE (10⁴ (km/h)²)	22.84	High
PDI (10⁶ (km/h)³)	22.55
Intensification / Weakening
Max Wind Gain/Step	+6 km/h
Max Wind Gain/24h	+19 km/h
Max Wind Loss/Step	-15 km/h
Pressure Variation
Max Pressure Drop/Step	-2 hPa
Max Pressure Drop/24h	-7 hPa
Max Pressure Rise/Step (weakening)	+5 hPa
Movement & Duration
Avg Movement Speed	14.6 km/h
Tracking Time	90h (3.8 days)
Time as TD+ (≥34kt)	156h (6.5d)
Time as Storm+ (≥64kt)	6h (0.3d)
Peak Intensity & Range
Peak Intensity	08:00 20/10/1952 11.8°N, 110.8°E
Latitude	11.3°N – 13.2°N (1.9°)
Longitude	108.2°E – 120°E (11.8°)

Advanced Indices Legend

ACE: Accumulated Cyclone Energy - measures total storm activity

PDI: Power Dissipation Index - measures potential destructiveness

RI: Rapid Intensification - when wind increases >=30 kt/24h or pressure drops >=30 hPa/24h

Countries with Direct Landfall

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Index	Meaning	Formula / Condition	Classification
ACE Accumulated Cyclone Energy	Accumulated Cyclone Energy. Measures the total energy generated by the storm during its lifetime. Only counts reports with wind ≥ 35 kt (TS level or higher).	`ACE = Σ(V_max²) / 10&sup4;` Unit: 10⁴ kt²	< 2: Low 2-6: Medium 6-15: High ≥ 15: Very High
PDI Power Dissipation Index	Power Dissipation Index. More sensitive than ACE to extremely strong storms due to using cubic power. Reflects potential destructive power.	`PDI = Σ(V_max&sup³;) / 10&sup6;` Unit: 10⁶ kt³	Higher value = greater cumulative destructive power
RI Rapid Intensification	Rapid Intensification - storm strengthens suddenly in a short time. Very dangerous as it is difficult to forecast and causes surprise for prevention efforts.	Wind increase ≥ 30 kt/24h or Pressure drop ≥ 30 hPa/24h	Has RI or Fast increase (≥20kt)
Max wind gain/step	Maximum wind increase between 2 consecutive reports (usually 6 hours apart). Shows the fastest local intensification rate.	`max(V_i+1 - V_i)` Unit: kt (km/h)	Positive value = storm strengthening
Max wind gain/24h	Maximum wind increase in a 24-hour window. Main criterion for determining Rapid Intensification (RI).	`max(V_t+24h - V_t)` RI if ≥ 30 kt/24h	≥ 30kt: RI ≥ 20kt: Fast
Max wind loss/step	Maximum wind weakening between 2 consecutive reports. Shows at which stage the storm weakened fastest.	`max(V_i - V_i+1)` Unit: kt (km/h)	Positive value = storm weakening
Max pressure drop/step	Maximum pressure drop between 2 consecutive reports. Pressure decrease = storm center strengthening. Reflects local deepening rate.	`max(P_i - P_i+1)` Unit: hPa	Higher value = faster strengthening
Max pressure drop/24h	Maximum pressure drop in a 24-hour window. Important index for evaluating explosive deepening / explosive intensification.	`max(P_t - P_t+24h)` Explosive if ≥ 30 hPa	≥ 30hPa: RI ≥ 20hPa: Strong
Max pressure rise/step	Maximum pressure rise between 2 consecutive reports. Pressure increase = storm weakening. Large value indicates rapid weakening (due to terrain interaction, landfall, etc.).	`max(P_i+1 - P_i)` Unit: hPa	Higher value = faster weakening
Average moving speed	Average moving speed of the storm center during the entire monitoring period by that agency.	`V_avg = S_total / T_total` Unit: kt (km/h)	Slow-moving storms (<15 km/h) usually cause prolonged heavy rain
Monitoring duration	Total time from first report to last report of that agency.	`T = t_end - t_start` Unit: hours (days)	Different agencies may monitor for different durations
TS+ Duration	Total hours with average wind ≥ 34 kt (Tropical Storm level or higher). Reflects how long the storm maintained significant intensity.	Average wind ≥ 34 kt	Longer storm = greater total damage
TY+ Duration	Total hours with average wind ≥ 64 kt (Typhoon level or higher). Storms maintaining this level longer have much greater destructive power.	Average wind ≥ 64 kt	Longer time at Typhoon level = more dangerous
Peak Intensity	Time and location (lat, lon) when the storm reached maximum wind according to each agency. Helps identify where the storm was strongest.	V_max = max(V_i)	Peak location helps assess danger for nearby areas
Latitude / Longitude	Spatial range of activity by latitude and longitude. Shows whether the storm affected area is wide or narrow.	min-max(lat), min-max(lon)	Large range = long trajectory, wide impact

Index

Meaning

Formula / Condition

Classification

ACE
Accumulated Cyclone Energy

Accumulated Cyclone Energy. Measures the total energy generated by the storm during its lifetime. Only counts reports with wind ≥ 35 kt (TS level or higher).

ACE = Σ(V_max²) / 10&sup4;
Unit: 10⁴ kt²

< 2: Low
2-6: Medium
6-15: High
≥ 15: Very High

PDI
Power Dissipation Index

Power Dissipation Index. More sensitive than ACE to extremely strong storms due to using cubic power. Reflects potential destructive power.

PDI = Σ(V_max&sup³;) / 10&sup6;
Unit: 10⁶ kt³

Higher value = greater cumulative destructive power

RI
Rapid Intensification

Rapid Intensification - storm strengthens suddenly in a short time. Very dangerous as it is difficult to forecast and causes surprise for prevention efforts.

Wind increase ≥ 30 kt/24h or Pressure drop ≥ 30 hPa/24h

Has RI or
Fast increase (≥20kt)

Max wind gain/step

Maximum wind increase between 2 consecutive reports (usually 6 hours apart). Shows the fastest local intensification rate.

max(V_i+1 - V_i)
Unit: kt (km/h)

Positive value = storm strengthening

Max wind gain/24h

Maximum wind increase in a 24-hour window. Main criterion for determining Rapid Intensification (RI).

max(V_t+24h - V_t)
RI if ≥ 30 kt/24h

≥ 30kt: RI
≥ 20kt: Fast

Max wind loss/step

Maximum wind weakening between 2 consecutive reports. Shows at which stage the storm weakened fastest.

max(V_i - V_i+1)
Unit: kt (km/h)

Positive value = storm weakening

Max pressure drop/step

Maximum pressure drop between 2 consecutive reports. Pressure decrease = storm center strengthening. Reflects local deepening rate.

max(P_i - P_i+1)
Unit: hPa

Higher value = faster strengthening

Max pressure drop/24h

Maximum pressure drop in a 24-hour window. Important index for evaluating explosive deepening / explosive intensification.

max(P_t - P_t+24h)
Explosive if ≥ 30 hPa

≥ 30hPa: RI
≥ 20hPa: Strong

Max pressure rise/step

Maximum pressure rise between 2 consecutive reports. Pressure increase = storm weakening. Large value indicates rapid weakening (due to terrain interaction, landfall, etc.).

max(P_i+1 - P_i)
Unit: hPa

Higher value = faster weakening

Average moving speed

Average moving speed of the storm center during the entire monitoring period by that agency.

V_avg = S_total / T_total
Unit: kt (km/h)

Slow-moving storms (<15 km/h) usually cause prolonged heavy rain

Monitoring duration

Total time from first report to last report of that agency.

T = t_end - t_start
Unit: hours (days)

Different agencies may monitor for different durations

TS+ Duration

Total hours with average wind ≥ 34 kt (Tropical Storm level or higher). Reflects how long the storm maintained significant intensity.

Average wind ≥ 34 kt

Longer storm = greater total damage

TY+ Duration

Total hours with average wind ≥ 64 kt (Typhoon level or higher). Storms maintaining this level longer have much greater destructive power.

Average wind ≥ 64 kt

Longer time at Typhoon level = more dangerous

Peak Intensity

Time and location (lat, lon) when the storm reached maximum wind according to each agency. Helps identify where the storm was strongest.

V_max = max(V_i)

Peak location helps assess danger for nearby areas

Latitude / Longitude

Spatial range of activity by latitude and longitude. Shows whether the storm affected area is wide or narrow.

min-max(lat), min-max(lon)

Large range = long trajectory, wide impact

VAE (1952)

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VAE (1952)

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Advanced Meteorological Indices by Agency Automatically calculated from raw data

Advanced Indices Legend

Countries with Direct Landfall

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