This is storm VERA that was active in 1979 in the W. Pacific region with maximum winds of 259 km/h.

What was the maximum intensity of the storm?

Max Wind: 259 km/h. Min Pressure: hPa.

storm VERA (1979) - Track and intensity details

Name: storm VERA
Start: 1979-10-27
End: 1979-11-10
Location: W. Pacific

VERA (1979)

Storm Code: 1979300N04166 | Region: W. Pacific
Active from 27/10/1979 to 10/11/1979 (15 days)

259 km/h

1-min Wind (JTWC)

Level 17

215 km/h

10-min Wind (CMA)

Level 17

915 hPa

Min Pressure

5,701 km

Distance

Forecast Agencies

Agency	Max Intensity	Trajectory	Energy	highest_classification
TD9636	259	~	93	5,701	72.17	151.94	Level 17 - Super Typhoon
CMA (China)	215	915	77	5,091	48.12	85.63	Level 17 - Super Typhoon
WMO (International)	204	915	28	3,750	46.68	77.62	Level 17 - Super Typhoon
JMA (Japan)	204	915	55	3,812	46.68	77.62	Level 17 - Super Typhoon
JTWC	259	~	45	3,492	71.34	154.17	Level 17 - Super Typhoon
HKO (Hong Kong)	204	915	43	3,242	48.74	84.10	Level 17 - Super Typhoon
DS824	259	~	45	3,492	71.34	154.17	Level 17 - Super Typhoon

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)

TD9636

259

5,701

72.17

151.94

Level 17 - Super Typhoon

CMA (China)

215

915

5,091

48.12

85.63

Level 17 - Super Typhoon

WMO (International)

204

915

3,750

46.68

77.62

Level 17 - Super Typhoon

JMA (Japan)

204

915

3,812

46.68

77.62

Level 17 - Super Typhoon

JTWC

259

3,492

71.34

154.17

Level 17 - Super Typhoon

HKO (Hong Kong)

204

915

3,242

48.74

84.10

Level 17 - Super Typhoon

DS824

259

3,492

71.34

154.17

Level 17 - Super Typhoon

Advanced Meteorological Indices by Agency Automatically calculated from raw data

TD9636 RI

Energy
ACE (10⁴ (km/h)²)	72.17	Very High
PDI (10⁶ (km/h)³)	151.94
Intensification / Weakening
Max Wind Gain/Step	+19 km/h
Max Wind Gain/24h	+130 km/h	RI
Max Wind Loss/Step	-19 km/h
Movement & Duration
Avg Movement Speed	20.7 km/h
Tracking Time	276h (11.5 days)
Time as TD+ (≥34kt)	129h (5.4d)
Time as Storm+ (≥64kt)	93h (3.9d)
Peak Intensity & Range
Peak Intensity	19:00 04/11/1979 11.6°N, 129.2°E
Latitude	4.1°N – 17.8°N (13.7°)
Longitude	117.9°E – 165.9°E (48°)

CMA (China) RI

Energy
ACE (10⁴ (km/h)²)	48.12	High
PDI (10⁶ (km/h)³)	85.63
Intensification / Weakening
Max Wind Gain/Step	+19 km/h
Max Wind Gain/24h	+89 km/h	RI
Max Wind Loss/Step	-19 km/h
Pressure Variation
Max Pressure Drop/Step	-10 hPa
Max Pressure Drop/24h	-55 hPa	RI
Max Pressure Rise/Step (weakening)	+10 hPa
Movement & Duration
Avg Movement Speed	22.3 km/h
Tracking Time	228h (9.5 days)
Time as TD+ (≥34kt)	123h (5.1d)
Time as Storm+ (≥64kt)	75h (3.1d)
Peak Intensity & Range
Peak Intensity	19:00 04/11/1979 11.6°N, 129.3°E
Latitude	5.3°N – 19.3°N (14°)
Longitude	113.2°E – 148.8°E (35.6°)

WMO (International) RI

Energy
ACE (10⁴ (km/h)²)	46.68	High
PDI (10⁶ (km/h)³)	77.62
Intensification / Weakening
Max Wind Gain/Step	+37 km/h
Max Wind Gain/24h	+83 km/h	RI
Max Wind Loss/Step	-28 km/h
Pressure Variation
Max Pressure Drop/Step	-20 hPa
Max Pressure Drop/24h	-55 hPa	RI
Max Pressure Rise/Step (weakening)	+20 hPa
Movement & Duration
Avg Movement Speed	23.1 km/h
Tracking Time	162h (6.8 days)
Time as TD+ (≥34kt)	126h (5.3d)
Time as Storm+ (≥64kt)	84h (3.5d)
Peak Intensity & Range
Peak Intensity	01:00 05/11/1979 12.1°N, 127.6°E
Latitude	6.5°N – 17.8°N (11.3°)
Longitude	116.8°E – 147.4°E (30.6°)

JMA (Japan) RI

Energy
ACE (10⁴ (km/h)²)	46.68	High
PDI (10⁶ (km/h)³)	77.62
Intensification / Weakening
Max Wind Gain/Step	+19 km/h
Max Wind Gain/24h	+83 km/h	RI
Max Wind Loss/Step	-15 km/h
Pressure Variation
Max Pressure Drop/Step	-10 hPa
Max Pressure Drop/24h	-55 hPa	RI
Max Pressure Rise/Step (weakening)	+10 hPa
Movement & Duration
Avg Movement Speed	23.5 km/h
Tracking Time	162h (6.8 days)
Time as TD+ (≥34kt)	123h (5.1d)
Time as Storm+ (≥64kt)	81h (3.4d)
Peak Intensity & Range
Peak Intensity	01:00 05/11/1979 12.1°N, 127.6°E
Latitude	6.2°N – 17.9°N (11.7°)
Longitude	117°E – 148.3°E (31.3°)

JTWC RI

Energy
ACE (10⁴ (km/h)²)	71.34	Very High
PDI (10⁶ (km/h)³)	154.17
Intensification / Weakening
Max Wind Gain/Step	+33 km/h
Max Wind Gain/24h	+130 km/h	RI
Max Wind Loss/Step	-33 km/h
Movement & Duration
Avg Movement Speed	26.5 km/h
Tracking Time	132h (5.5 days)
Time as TD+ (≥34kt)	126h (5.3d)
Time as Storm+ (≥64kt)	87h (3.6d)
Peak Intensity & Range
Peak Intensity	13:00 04/11/1979 11.1°N, 131°E
Latitude	7°N – 18.3°N (11.3°)
Longitude	117.9°E – 145.8°E (27.9°)

HKO (Hong Kong) RI

Energy
ACE (10⁴ (km/h)²)	48.74	High
PDI (10⁶ (km/h)³)	84.10
Intensification / Weakening
Max Wind Gain/Step	+33 km/h
Max Wind Gain/24h	+102 km/h	RI
Max Wind Loss/Step	-24 km/h
Pressure Variation
Max Pressure Drop/Step	-25 hPa
Max Pressure Drop/24h	-65 hPa	RI
Max Pressure Rise/Step (weakening)	+18 hPa
Movement & Duration
Avg Movement Speed	25.7 km/h
Tracking Time	126h (5.3 days)
Time as TD+ (≥34kt)	123h (5.1d)
Time as Storm+ (≥64kt)	81h (3.4d)
Peak Intensity & Range
Peak Intensity	07:00 04/11/1979 10.5°N, 133.1°E
Latitude	7°N – 17.9°N (10.9°)
Longitude	120°E – 146°E (26°)

DS824 RI

Energy
ACE (10⁴ (km/h)²)	71.34	Very High
PDI (10⁶ (km/h)³)	154.17
Intensification / Weakening
Max Wind Gain/Step	+33 km/h
Max Wind Gain/24h	+130 km/h	RI
Max Wind Loss/Step	-33 km/h
Movement & Duration
Avg Movement Speed	26.5 km/h
Tracking Time	132h (5.5 days)
Time as TD+ (≥34kt)	126h (5.3d)
Time as Storm+ (≥64kt)	87h (3.6d)
Peak Intensity & Range
Peak Intensity	13:00 04/11/1979 11.1°N, 131°E
Latitude	7°N – 18.3°N (11.3°)
Longitude	117.9°E – 145.8°E (27.9°)

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

🇵🇭 Philippines

WMO 150 km/h Level 14

16.56°, 122.29° 1979-11-06 08:12:53

TD9636 159 km/h Level 14

16.49°, 122.25° 1979-11-06 07:24:33

CMA 135 km/h Level 13

16.59°, 122.30° 1979-11-06 08:52:26

JMA 150 km/h Level 14

16.49°, 122.25° 1979-11-06 08:10:57

JTWC 161 km/h Level 14

16.58°, 122.30° 1979-11-06 08:05:30

HKO 185 km/h Level 16

13.80°, 124.40° 1979-11-05 08:58:03

DS824 161 km/h Level 14

16.58°, 122.30° 1979-11-06 08:05:30

Values are interpolated at landfall time and may differ from actual data.

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

VERA (1979)

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Advanced Meteorological Indices by Agency Automatically calculated from raw data

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Countries with Direct Landfall

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VERA (1979)

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Weather Agencies (7 sources)

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Quick Stats

Agency Data Comparison

Indices Legend

Advanced Meteorological Indices by Agency Automatically calculated from raw data

Advanced Indices Legend

Countries with Direct Landfall

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