This is storm JUDITH:MARTHA that was active in 1966 in the S. Indian region with maximum winds of 74 km/h.

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Max Wind: 74 km/h. Min Pressure: hPa.

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Storm Detail 1966

JUDITH:MARTHA (1966)

Name: storm JUDITH:MARTHA
Start: 1966-02-23
End: 1966-03-08
Location: S. Indian

Storm Code: 1966055S11099 | Region: S. Indian
Active from 24/02/1966 to 08/03/1966 (13 days)

74 km/h

As measured · 1-min avg

Peak wind · 1-min (JTWC)

Converted ≈ 65 km/h · 10-min avg

Level 8

992 hPa

Min Pressure

6,127 km

Distance

Forecast Agencies

Beaufort scale: all winds converted to the 10-min avg standard (WMO). Each agency's original value is shown alongside.

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Weather Agencies (7 sources)

TD9636 74 km/h

JTWC 74 km/h

DS824 74 km/h

NEUMANN 74 km/h

WMO (International) N/A

BOM (Australia) N/A

Météo-France N/A

Storm Lifecycle Timeline

Key milestones: formation → intensified into a storm → peak → dissipation

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Storm Structure

JUDITH:MARTHA

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JUDITH:MARTHA

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Track List (0 points)

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

Wind Intensity Chart

TD9636 JTWC DS824 NEUMANN BOM REUNION

No data

Selected agencies have no data for this chart.

Quick Stats

74 km/h

Max Wind

992 hPa

Min Pressure

308h

Activity Duration

Forecast Agencies

Agency Data Comparison

TD9636 10-min avg

74 km/h Max Wind

N/A Min Pressure

172 Measurements

JTWC 1-min avg

65 km/h Max Wind Orig.: 74 km/h

N/A Min Pressure

171 Measurements

DS824 10-min avg

74 km/h Max Wind

1001 hPa Min Pressure

171 Measurements

NEUMANN 10-min avg

74 km/h Max Wind

N/A Min Pressure

161 Measurements

WMO (International)

N/A Max Wind

992 hPa Min Pressure

50 Measurements

BOM (Australia)

N/A Max Wind

992 hPa Min Pressure

166 Measurements

Météo-France

N/A Max Wind

N/A Min Pressure

52 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
TD9636	74	~	172	6,127	5.25	3.62	Level 8 - Storm
JTWC	65 Orig.: 74	~	171	5,634	4.32	2.86	Level 8 - Storm
DS824	74	1001	171	5,769	5.66	4.26	Level 8 - Storm
NEUMANN	74	~	161	4,672	5.66	4.26	Level 8 - Storm
WMO (International) (coordinates_only)	~	992	50	3,298	~	~	Undefined
BOM (Australia) (coordinates_only)	~	992	166	5,116	~	~	Undefined
Météo-France (coordinates_only)	~	~	52	2,364	~	~	Undefined

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

TD9636

Energy
ACE (10⁴ (km/h)²)	5.25	Low
PDI (10⁶ (km/h)³)	3.62
Intensification / Weakening
Max Wind Gain/Step	+11 km/h
Max Wind Gain/24h	+37 km/h	Fast
Max Wind Loss/Step	-7 km/h
Movement & Duration
Avg Movement Speed	20.3 km/h
Tracking Time	302h (12.6 days)
Time as TD+ (≥34kt)	23h (1d)
Peak Intensity & Range
Peak Intensity	00:00 02/03/1966 -18.6°N, 92.1°E
Latitude	-29.7°N – -11°N (18.7°)
Longitude	65.9°E – 99°E (33.1°)

JTWC

Energy
ACE (10⁴ (km/h)²)	4.32	Low
PDI (10⁶ (km/h)³)	2.86
Intensification / Weakening
Max Wind Gain/Step	+13 km/h
Max Wind Gain/24h	+37 km/h	Fast
Max Wind Loss/Step	-9 km/h
Movement & Duration
Avg Movement Speed	18.8 km/h
Tracking Time	300h (12.5 days)
Time as TD+ (≥34kt)	40h (1.7d)
Peak Intensity & Range
Peak Intensity	02:00 02/03/1966 -18.5°N, 92.3°E
Latitude	-28.9°N – -11°N (17.9°)
Longitude	66°E – 99°E (33°)

DS824

Energy
ACE (10⁴ (km/h)²)	5.66	Low
PDI (10⁶ (km/h)³)	4.26
Intensification / Weakening
Max Wind Gain/Step	+15 km/h
Max Wind Gain/24h	+37 km/h	Fast
Max Wind Loss/Step	-9 km/h
Pressure Variation
Max Pressure Rise/Step (weakening)	+1 hPa
Movement & Duration
Avg Movement Speed	19.2 km/h
Tracking Time	300h (12.5 days)
Time as TD+ (≥34kt)	40h (1.7d)
Peak Intensity & Range
Peak Intensity	02:00 02/03/1966 -18.5°N, 92.3°E
Latitude	-28.9°N – -11°N (17.9°)
Longitude	64.9°E – 99°E (34.1°)

NEUMANN

Energy
ACE (10⁴ (km/h)²)	5.66	Low
PDI (10⁶ (km/h)³)	4.26
Intensification / Weakening
Max Wind Gain/Step	+13 km/h
Max Wind Gain/24h	+37 km/h	Fast
Max Wind Loss/Step	-9 km/h
Movement & Duration
Avg Movement Speed	16.6 km/h
Tracking Time	282h (11.8 days)
Time as TD+ (≥34kt)	40h (1.7d)
Peak Intensity & Range
Peak Intensity	02:00 02/03/1966 -18.5°N, 92.3°E
Latitude	-23°N – -11°N (12°)
Longitude	67.1°E – 99°E (31.9°)

WMO (International)

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	15.9 km/h
Tracking Time	207h (8.6 days)
Peak Intensity & Range
Latitude	-20.7°N – -11.2°N (9.5°)
Longitude	79.2°E – 98.7°E (19.5°)

BOM (Australia)

Pressure Variation
Max Pressure Drop/Step	-1 hPa
Max Pressure Drop/24h	-7 hPa
Max Pressure Rise/Step (weakening)	+1 hPa
Movement & Duration
Avg Movement Speed	17.8 km/h
Tracking Time	288h (12 days)
Peak Intensity & Range
Latitude	-24.7°N – -11°N (13.7°)
Longitude	64.8°E – 99°E (34.2°)

Météo-France

Movement & Duration
Avg Movement Speed	24.6 km/h
Tracking Time	96h (4 days)
Peak Intensity & Range
Latitude	-29.8°N – -20°N (9.8°)
Longitude	66.2°E – 80.4°E (14.2°)

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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JUDITH:MARTHA (1966)

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Storm Structure

Comparison Storms 0

Weather Agencies (7 sources)

Storm Lifecycle Timeline

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Track List (0 points)

Wind Intensity Chart

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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JUDITH:MARTHA

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