Overall Red alert Tropical Cyclone for ETA-20
in Nicaragua, United States, Honduras


Tropical Cyclone ETA-20 can have a high humanitarian impact based on the maximum sustained wind speed,exposed population and vulnerability.

Meteorological source GDACS (NOAA)
Exposed countries Nicaragua, United States, Honduras
Exposed population 200 thousand in Category 1 or higher
Maximum wind speed 241 km/h
Maximum storm surge 1.4 m (03 Nov 07:00 UTC)
Vulnerability Medium (Nicaragua)


GDACS alert score for Tropical Cyclones is 0.5 (GREEN Alert), 1.5 (ORANGE Alert), 2.5 (RED Alert)
For more info on GDACS alert score click here.
  Wind Storm surge Rainfall GDACS score
GDACS Current 139 km/h 1.4 m n.a. 1.5
GDACS Overall 241 km/h 1.4 m n.a. 1.5

Maximum winds, storm surge, rainfall (Current: over the next 72 h, Overall: entire TC track)


139 km/h Current

Up to 290000 people in Category 1 strength or higher (see SSHS)

Impact Timeline

Alert Date (UTC) Max Winds (km/h) Population in
Tropical Storm
Population in
Cat. 1 or higher
Orange 1 31 Oct 2020 21:00 139 7.1 million 290 thousand Nicaragua

Bulletin Timeline

Alert Date (UTC) Category Max winds
Population in
Tropical Storm
Population in
Cat.1 or higher
Location (lat, lon) Countries
1 31 Oct 2020 21:00 Tropical depression 56 no people no people 15, -73.2
1 01 Nov 2020 06:00 Tropical storm 65 no people no people 15.1, -75.6
1 01 Nov 2020 18:00 Tropical storm 83 no people no people 15.4, -78.3
1 02 Nov 2020 06:00 Tropical storm 102 200000 people no people 15.5, -80.4 Nicaragua
1 02 Nov 2020 18:00 Category 1 120 1 million people 17000 people 15.1, -82.1 Nicaragua
1 03 Nov 2020 06:00 Category 1 139 3.1 million people 100000 people 14.3, -83.1 Nicaragua
1 03 Nov 2020 18:00 Category 1 130 4.5 million people 200000 people 13.8, -83.7 Nicaragua
1 04 Nov 2020 18:00 Tropical storm 74 6.3 million people no people 13.5, -85.5 El Salvador
1 05 Nov 2020 18:00 Tropical depression 46 no people no people 14, -86.9 El Salvador
Actual track of the current bulletin
The alert for forecast greater than 3 days is limited to Orange level.

Exposed population




Region Province Country Population
Zelaya Nicaragua 330000 people
Jinotega Nicaragua 190000 people

Populated places

Name Region Province Country City class Population
Puerto Cabezas Atlántico Norte Nicaragua City 33000 people

Critical infrastructure

Airports, ports, nuclear plants and hydrodams at risk, if affected, are listed below.


Name IATA Code Elevation (m) Usage Runway type IFR Runway Length (ft)
Puerto Cabezas PUZ 16 Civ. Paved No 8200
Rosita RFS 63 0
Siuna SIU unknown 0
Siuna 146 0


Name LOCODE Country
Cayos Miskitos Nicaragua
Tuapi Nicaragua
Puerto Cabezas NIPUZ Nicaragua


Rainfall accumulation of the past 24h, as detected by the Global Precipitation Measurement mission of NASA. For more information, see https://www.nasa.gov/mission_pages/GPM/main/index.html.



1.4 m

The maximum Storm surge height is  1.4m in Huahua, Nicaragua. This height is estimated for 03 Nov 2020 21:00 UTC .

The JRC has developed an experimental global storm surge model, which is run after each advisory issued by the regional tropical cyclone centres. The calculations are published about 20 minutes after a new advisory is detected by GDACS. The calculations identify the populated places affected by storm surge up to three days in advance, using the forecasted track. When forecasts change, the associated storm surge changes too and alert levels may go up or down. All links, data, statistics and maps refer to the latest available calculation. If the calculation for the last advisory is not completed, the latest available calculation is shown.

Locations affected by Storm surge (2137 locations). Calculation based on advisory number 52 of 13 Nov 2020 09:00:00 UTC. (Simulation using 0.5 minute resolution)

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