This is storm LISA that was active in 1983 in the S. Pacific region with maximum winds of 111 km/h.

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Max Wind: 111 km/h. Min Pressure: hPa.

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Storm Detail 1983

LISA (1983)

Name: storm LISA
Start: 1982-12-10
End: 1982-12-18
Location: S. Pacific

Storm Code: 1982344S09200 | Region: S. Pacific
Active from 10/12/1982 to 18/12/1982 (9 days)

102 km/h

1-min Wind (JTWC)

Level 10

111 km/h

10-min Wind (WELLINGTON)

Level 11

975 hPa

Min Pressure

3,782 km

Distance

Forecast Agencies

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Weather Agencies (5 sources)

JTWC 102 km/h

TD9636 N/A

NEUMANN 102 km/h

WMO (International) 111 km/h

WELLINGTON 111 km/h

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Storm Structure

LISA

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LISA

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Track List (0 points)

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

Wind Intensity Chart

JTWC TD9636 NEUMANN WELLINGTON

No data

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Quick Stats

111 km/h

Max Wind

975 hPa

Min Pressure

204h

Activity Duration

Forecast Agencies

Agency Data Comparison

JTWC

102 km/h Max Wind

N/A Min Pressure

49 Measurements

TD9636

N/A Max Wind

N/A Min Pressure

49 Measurements

NEUMANN

102 km/h Max Wind

984 hPa Min Pressure

49 Measurements

WMO (International)

111 km/h Max Wind

975 hPa Min Pressure

17 Measurements

WELLINGTON

111 km/h Max Wind

975 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
JTWC	102	~	49	2,239	27.44	23.63	Level 10 - Severe Storm
TD9636 (coordinates_only)	~	~	49	2,231	~	~	Undefined
NEUMANN	102	984	49	2,239	27.44	23.63	Level 10 - Severe Storm
WMO (International)	111	975	17	3,632	6.69	6.35	Level 11 - Severe Storm
WELLINGTON	111	975	65	3,782	26.31	24.96	Level 11 - Severe Storm

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

JTWC

Energy
ACE (10⁴ (km/h)²)	27.44	High
PDI (10⁶ (km/h)³)	23.63
Intensification / Weakening
Max Wind Gain/Step	+6 km/h
Max Wind Gain/24h	+9 km/h
Max Wind Loss/Step	-6 km/h
Movement & Duration
Avg Movement Speed	15.5 km/h
Tracking Time	144h (6 days)
Time as TD+ (≥34kt)	234h (9.8d)
Peak Intensity & Range
Peak Intensity	01:00 14/12/1982 -20.4°N, -154.8°E
Latitude	-23.9°N – -9°N (14.9°)
Longitude	-160°E – -152°E (8°)

TD9636

Movement & Duration
Avg Movement Speed	15.5 km/h
Tracking Time	144h (6 days)
Peak Intensity & Range
Latitude	-23.9°N – -9°N (14.9°)
Longitude	-160°E – -152.1°E (7.9°)

NEUMANN

Energy
ACE (10⁴ (km/h)²)	27.44	High
PDI (10⁶ (km/h)³)	23.63
Intensification / Weakening
Max Wind Gain/Step	+6 km/h
Max Wind Gain/24h	+9 km/h
Max Wind Loss/Step	-6 km/h
Pressure Variation
Movement & Duration
Avg Movement Speed	15.5 km/h
Tracking Time	144h (6 days)
Time as TD+ (≥34kt)	234h (9.8d)
Peak Intensity & Range
Peak Intensity	01:00 14/12/1982 -20.4°N, -154.8°E
Latitude	-23.9°N – -9°N (14.9°)
Longitude	-160°E – -152°E (8°)

WMO (International) RI

Energy
ACE (10⁴ (km/h)²)	6.69	Low
PDI (10⁶ (km/h)³)	6.35
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	-7 hPa
Max Pressure Drop/24h	-22 hPa	Strong
Max Pressure Rise/Step (weakening)	+8 hPa
Movement & Duration
Avg Movement Speed	18.9 km/h
Tracking Time	192h (8 days)
Time as TD+ (≥34kt)	48h (2d)
Peak Intensity & Range
Peak Intensity	19:00 13/12/1982 -20.2°N, -154.5°E
Latitude	-33°N – -9.1°N (23.9°)
Longitude	-159.3°E – -143°E (16.3°)

WELLINGTON

Energy
ACE (10⁴ (km/h)²)	26.31	High
PDI (10⁶ (km/h)³)	24.96
Intensification / Weakening
Max Wind Gain/Step	+6 km/h
Max Wind Gain/24h	+19 km/h
Max Wind Loss/Step	-6 km/h
Pressure Variation
Max Pressure Drop/Step	-2 hPa
Max Pressure Drop/24h	-7 hPa
Max Pressure Rise/Step (weakening)	+2 hPa
Movement & Duration
Avg Movement Speed	19.7 km/h
Tracking Time	192h (8 days)
Time as TD+ (≥34kt)	192h (8d)
Peak Intensity & Range
Peak Intensity	19:00 13/12/1982 -20°N, -154.3°E
Latitude	-33°N – -8.5°N (24.5°)
Longitude	-159.2°E – -143°E (16.2°)

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

LISA (1983)

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Storm Structure

Comparison Storms 0

Weather Agencies (5 sources)

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Quick Stats

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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LISA

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