This is storm NISHA:ORAMA that was active in 1983 in the S. Pacific region with maximum winds of 194 km/h.

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Max Wind: 194 km/h. Min Pressure: hPa.

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Storm Detail 1983

NISHA:ORAMA (1983)

Name: storm NISHA:ORAMA
Start: 1983-02-20
End: 1983-02-28
Location: S. Pacific

Storm Code: 1983051S15214 | Region: S. Pacific
Active from 20/02/1983 to 28/02/1983 (9 days)

185 km/h

1-min Wind (JTWC)

Level 16

185 km/h

10-min Wind (WELLINGTON)

Level 16

925 hPa

Min Pressure

3,268 km

Distance

Forecast Agencies

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Weather Agencies (4 sources)

WMO (International) 185 km/h

WELLINGTON 185 km/h

JTWC 185 km/h

NEUMANN 194 km/h

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Storm Structure

NISHA:ORAMA

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NISHA:ORAMA

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Track List (0 points)

#	Time (GMT+7)	Position	Wind (km/h)	Pressure	Level

Wind Intensity Chart

WELLINGTON JTWC NEUMANN

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Quick Stats

194 km/h

Max Wind

925 hPa

Min Pressure

204h

Activity Duration

Forecast Agencies

Agency Data Comparison

WMO (International)

185 km/h Max Wind

925 hPa Min Pressure

16 Measurements

WELLINGTON

185 km/h Max Wind

925 hPa Min Pressure

61 Measurements

JTWC

185 km/h Max Wind

N/A Min Pressure

65 Measurements

NEUMANN

194 km/h Max Wind

943 hPa Min Pressure

65 Measurements

Agency	Max Intensity		Trajectory		Energy		highest_classification
Agency	Max Wind (km/h)	Min Pressure (hPa)	Number of points	Distance (km)	ACE (10⁴ (km/h)²)	PDI (10⁶ (km/h)³)	highest_classification
WMO (International)	185	925	16	2,060	21.40	32.21	Level 16 - Super Typhoon
WELLINGTON	185	925	61	2,036	84.20	127.23	Level 16 - Super Typhoon
JTWC	185	~	65	3,268	101.80	157.34	Level 16 - Super Typhoon
NEUMANN	194	943	65	3,268	99.88	154.48	Level 16 - Super Typhoon

Indices Legend

Max Wind (kt/km/h): Maximum wind speed by agency

Min Pressure: Lowest central pressure

Number of points: Number of observation points in track

Distance: Total track distance traveled

ACE: Accumulated Cyclone Energy

PDI: Power Dissipation Index

Advanced Meteorological Indices by Agency Automatically calculated from raw data

WMO (International) RI

Energy
ACE (10⁴ (km/h)²)	21.40	High
PDI (10⁶ (km/h)³)	32.21
Intensification / Weakening
Max Wind Gain/Step	+28 km/h
Max Wind Gain/24h	+102 km/h	RI
Max Wind Loss/Step	-28 km/h
Pressure Variation
Max Pressure Drop/Step	-20 hPa
Max Pressure Drop/24h	-62 hPa	RI
Max Pressure Rise/Step (weakening)	+15 hPa
Movement & Duration
Avg Movement Speed	11.4 km/h
Tracking Time	180h (7.5 days)
Time as TD+ (≥34kt)	72h (3d)
Time as Storm+ (≥64kt)	42h (1.8d)
Peak Intensity & Range
Peak Intensity	19:00 24/02/1983 -16.1°N, -147°E
Latitude	-24.8°N – -13.9°N (10.9°)
Longitude	-147°E – -140.5°E (6.5°)

WELLINGTON

Energy
ACE (10⁴ (km/h)²)	84.20	Very High
PDI (10⁶ (km/h)³)	127.23
Intensification / Weakening
Max Wind Gain/Step	+7 km/h
Max Wind Gain/24h	+28 km/h
Max Wind Loss/Step	-7 km/h
Pressure Variation
Max Pressure Drop/Step	-5 hPa
Max Pressure Drop/24h	-20 hPa	Strong
Max Pressure Rise/Step (weakening)	+4 hPa
Movement & Duration
Avg Movement Speed	11.3 km/h
Tracking Time	180h (7.5 days)
Time as TD+ (≥34kt)	276h (11.5d)
Time as Storm+ (≥64kt)	162h (6.8d)
Peak Intensity & Range
Peak Intensity	19:00 24/02/1983 -16°N, -147.4°E
Latitude	-24°N – -13.8°N (10.2°)
Longitude	-147.4°E – -141°E (6.4°)

JTWC

Energy
ACE (10⁴ (km/h)²)	101.80	Very High
PDI (10⁶ (km/h)³)	157.34
Intensification / Weakening
Max Wind Gain/Step	+9 km/h
Max Wind Gain/24h	+37 km/h	Fast
Max Wind Loss/Step	-13 km/h
Movement & Duration
Avg Movement Speed	17 km/h
Tracking Time	192h (8 days)
Time as TD+ (≥34kt)	300h (12.5d)
Time as Storm+ (≥64kt)	222h (9.3d)
Peak Intensity & Range
Peak Intensity	13:00 24/02/1983 -15.8°N, -146.8°E
Latitude	-36.5°N – -12.8°N (23.7°)
Longitude	-146.8°E – -137°E (9.8°)

NEUMANN

Energy
ACE (10⁴ (km/h)²)	99.88	Very High
PDI (10⁶ (km/h)³)	154.48
Intensification / Weakening
Max Wind Gain/Step	+9 km/h
Max Wind Gain/24h	+37 km/h	Fast
Max Wind Loss/Step	-15 km/h
Pressure Variation
Movement & Duration
Avg Movement Speed	17 km/h
Tracking Time	192h (8 days)
Time as TD+ (≥34kt)	294h (12.3d)
Time as Storm+ (≥64kt)	222h (9.3d)
Peak Intensity & Range
Peak Intensity	13:00 24/02/1983 -15.8°N, -146.8°E
Latitude	-36.5°N – -12.8°N (23.7°)
Longitude	-146.8°E – -137°E (9.8°)

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

Storm did not make landfall

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

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User Guide

NISHA:ORAMA (1983)

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Storm Structure

Comparison Storms 0

Weather Agencies (4 sources)

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Agency Data Comparison

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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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NISHA:ORAMA

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