Overall Green alert Tropical Cyclone for HILDA-21


Tropical Cyclone HILDA-21 can have a low humanitarian impact based on the maximum sustained wind speed,exposed population and vulnerability.

Meteorological source GDACS
Exposed countries
Exposed population No people in Category 1 or higher
Maximum wind speed 139 km/h
Maximum storm surge
Vulnerability --


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
Current 139 km/h 0.0 m n.a. 0.5
Overall 139 km/h 0.0 m n.a. 0.5

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


139 km/h Current Max.

Up to no people in Category 1 strength or higher (see SSHS)

Impact Timeline

Alert Date (UTC) Max Winds (km/h) Population in
Tropical Storm or higher
Population in
Cat 1. or higher
Green 1 30 Jul 2021 21:00 139 No people No people

Bulletin Timeline

Alert Date (UTC) Category
Max winds
Population in
Cat.1 or higher
Population in
Tropical Storm
or higher
Location (lat, lon) Countries
1 30 Jul 2021 21:00 Tropical storm 74 no people no people 12.1, -113.6
1 31 Jul 2021 06:00 Tropical storm 93 no people no people 12.6, -115.4
1 31 Jul 2021 18:00 Tropical storm 111 no people no people 13.2, -117.6
1 01 Aug 2021 06:00 Category 1 130 no people no people 13.8, -119.7
1 01 Aug 2021 18:00 Category 1 139 no people no people 14.3, -121.6
1 02 Aug 2021 06:00 Category 1 139 no people no people 14.9, -123.1
1 02 Aug 2021 18:00 Category 1 130 no people no people 15.3, -124.4
1 03 Aug 2021 18:00 Category 1 120 no people no people 16.6, -126.4
1 04 Aug 2021 18:00 Tropical storm 102 no people no people 18.3, -129.5
Actual track of the current bulletin
The alert for forecast greater than 3 days is limited to Orange level.

Exposed population - AoIs

Exposed population in the potential affected countries, provinces and populated places

Critical infrastructure

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


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.



0 m

The JRC has developed an experimental global storm surge model. 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 (0 locations). Calculation based on advisory number 1 of 30 Jul 2021 21:00:00 UTC. (Simulation using 2 minute resolution)

Alert Date (UTC) Name Country Storm surge height (m)