Overall Green alert Tropical Cyclone for WASI-20
in Samoa, Niue

Impact

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

Meteorological source HWRF
Exposed countries Samoa, Niue
Exposed population No people in Category 1 or higher
Maximum wind speed 119 km/h
Maximum storm surge 0.4 m (23 Feb 08:15 UTC)
Vulnerability Medium (Samoa)

GDACS Score

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
HWRF Current 83 km/h 0.4 m 357 mm 0.5
HWRF Overall 119 km/h 0.4 m 679 mm 0.5

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



Wind exposed population

Estimations based on the bulletin of 23 Feb 2020 06:00 UTC (Overall situation)
CategoryCountryPopulation 
Tropical StormSamoa, Niue93003
+
Samoa91973 
Niue1030 

See TC classification SSHS


Wind Impact Timeline

people affected <=10000
10000< people affected <=100000
people affected >100000


Alert Date (UTC) Max Winds (km/h) Pop in Cat. 1 or higher TS Cat. 1 Cat. 2 Cat. 3 Cat. 4 Cat. 5 Countries
GREEN 1 21 Feb 2020 12:00 58 - - - - - - -
GREEN 2 21 Feb 2020 18:00 61 - - - - - - -
GREEN 3 22 Feb 2020 00:00 76 -
- - - - - Samoa
GREEN 4 22 Feb 2020 06:00 108 -
- - - - - Samoa
GREEN 5 22 Feb 2020 12:00 112 - - - - - - -
GREEN 6 22 Feb 2020 18:00 119 - - - - - - -
GREEN 7 23 Feb 2020 00:00 79 - - - - - - -
GREEN 8 23 Feb 2020 06:00 83 -
- - - - - Niue




Impact estimation for the next 72h

Rainfall

679 mm

Up to 190 thousand can be affected by rain higher than 100mm (see SSHS)





Rain exposed population

Estimations based on the bulletin of 23 Feb 2020 06:00 UTC (Overall situation)
LevelCountryPopulation 
250-500 mmSamoa6833 
100-250 mmSamoa, American Samoa180392
+
Samoa180047 
American Samoa345 
50-100 mmSamoa, American Samoa, Niue65093
+
Samoa9748 
American Samoa54155 
Niue1190 

Rain Impact Timeline

people affected <=10000
10000< people affected <=100000
people affected >100000


Alert Date (UTC) Max Rainfall (mm) Pop >100mm or higher 50-100 100-250 250-500 500-750 750-1000 >1000 Countries
Blue 1 21 Feb 2020 12:00 369 - - - - - - -
Blue 2 21 Feb 2020 18:00 316 - - - - - - -
Blue 3 22 Feb 2020 00:00 282 6 thousand
- - - - Samoa
Blue 4 22 Feb 2020 06:00 278 90 thousand
- - - - Samoa
Blue 5 22 Feb 2020 12:00 146 -
- - - - - Samoa
Blue 6 22 Feb 2020 18:00 159 - - - - - - -
Blue 7 23 Feb 2020 00:00 88 -
- - - - - American Samoa
Blue 8 23 Feb 2020 06:00 357 - - - - - - -




Impact estimation for the next 72h

StormSurge

0.4 m

The maximum Storm surge height is  0.4m in Korosi, Fiji. This height is estimated for 23 Feb 2020 08:15 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.

Calculation based on the bulletin of 23 Feb 2020 06:00 UTC (Overall situation)
Alert Date (UTC) Name Country Storm surge height (m)
23 Feb 2020 08:15 Korosi Fiji  0.4
23 Feb 2020 08:15 Korotasere Fiji  0.4
23 Feb 2020 08:15 Naweni Fiji  0.4
23 Feb 2020 08:15 Nakarambo Fiji  0.4
23 Feb 2020 08:15 Viani Fiji  0.4
23 Feb 2020 08:15 Ndrekeniwai Fiji  0.4
23 Feb 2020 08:15 Mbangasau Fiji  0.4
23 Feb 2020 08:15 Malake Fiji  0.4
23 Feb 2020 08:15 Biagunu Fiji  0.3
23 Feb 2020 08:15 Lao Fiji  0.3
24 Feb 2020 04:00 Nailou Fiji  0.3
24 Feb 2020 04:00 Vangai Fiji  0.3
24 Feb 2020 04:00 Nawi Fiji  0.3
24 Feb 2020 04:00 Vunikura Fiji  0.3
23 Feb 2020 04:00 Navinggiri Fiji  0.3
23 Feb 2020 04:00 Yangganga Fiji  0.3
23 Feb 2020 04:00 Nawailevu Fiji  0.3
23 Feb 2020 04:00 Nasarowangga Fiji  0.3
23 Feb 2020 04:00 Navindamu Fiji  0.3
22 Feb 2020 02:45 Nanduri Fiji  0.3
22 Feb 2020 02:45 Vatutandova Fiji  0.3
24 Feb 2020 18:30 Korovou Fiji  0.3
24 Feb 2020 18:30 Lodoni Fiji  0.3
24 Feb 2020 18:30 Lawaki Fiji  0.3
24 Feb 2020 18:30 Naingani Fiji  0.3
24 Feb 2020 18:30 Navuti Fiji  0.3
24 Feb 2020 18:30 Nasaga Fiji  0.3
24 Feb 2020 18:30 Rukuruku Fiji  0.3
23 Feb 2020 08:45 Namboutini Fiji  0.3
23 Feb 2020 08:45 Napuka Fiji  0.3
24 Feb 2020 21:45 Natunuka Fiji  0.2
24 Feb 2020 21:45 Tavua Fiji  0.2
24 Feb 2020 21:45 Rabulu Fiji  0.2
24 Feb 2020 21:45 Togowere Fiji  0.2
21 Feb 2020 23:00 Nailanga Fiji  0.2
21 Feb 2020 23:00 Sorokoba Fiji  0.2
21 Feb 2020 23:00 Ba Fiji  0.2
22 Feb 2020 15:45 Kasavu Fiji  0.2
22 Feb 2020 15:45 Nausori Fiji  0.2
22 Feb 2020 15:45 Lokia Fiji  0.2
22 Feb 2020 15:45 Naimasimasi Fiji  0.2
22 Feb 2020 15:45 Ucunivanua Fiji  0.2
22 Feb 2020 15:45 Cautata Fiji  0.2
22 Feb 2020 15:45 Nasilai Fiji  0.2
22 Feb 2020 15:45 Dromuna Fiji  0.2
22 Feb 2020 15:45 Lovoni Fiji  0.2
22 Feb 2020 15:45 Levuka Fiji  0.2
22 Feb 2020 01:45 Rakiraki Fiji  0.2
22 Feb 2020 01:45 Vaileka Fiji  0.2
22 Feb 2020 01:45 Nanukuloa Fiji  0.2
22 Feb 2020 01:45 Nasau Fiji  0.2
22 Feb 2020 01:45 Nayavutoka Fiji  0.2
24 Feb 2020 18:15 Nauouo Fiji  0.2
24 Feb 2020 04:30 Rave-rave Fiji  0.2
24 Feb 2020 04:30 Ndawara Fiji  0.2
24 Feb 2020 04:30 Waisa Fiji  0.2
24 Feb 2020 04:30 Natua Fiji  0.2
23 Feb 2020 04:00 Koroinasolo Fiji  0.2
23 Feb 2020 04:00 Savu Sau Fiji  0.2
23 Feb 2020 08:15 Mbangata Fiji  0.2
23 Feb 2020 08:15 Savusavu Fiji  0.2
23 Feb 2020 08:15 Naindi Fiji  0.2
23 Feb 2020 21:15 Nagumu Fiji  0.2
23 Feb 2020 08:30 Galoa Fiji  0.2
23 Feb 2020 08:30 Yanutha Fiji  0.2
23 Feb 2020 08:30 Matavuralevu Fiji  0.2
23 Feb 2020 08:30 Pacific Harbour Fiji  0.2
23 Feb 2020 08:30 Waisomo Fiji  0.2
23 Feb 2020 08:30 Dakuimbeqa Fiji  0.2
23 Feb 2020 08:30 Lalati Fiji  0.2
23 Feb 2020 08:30 Navua Fiji  0.2
23 Feb 2020 08:30 Naitionitoni Fiji  0.2
23 Feb 2020 08:30 Mau Fiji  0.2
22 Feb 2020 02:00 Ndalomo Fiji  0.2
24 Feb 2020 21:30 Ndenimanu Fiji  0.2
23 Feb 2020 01:00 Namukalau Fiji  0.2
23 Feb 2020 01:00 Tawake Fiji  0.2
23 Feb 2020 01:00 Nukusa Fiji  0.2
23 Feb 2020 01:00 Nambouono Fiji  0.2
24 Feb 2020 09:15 Nabouwalu Fiji  0.1
24 Feb 2020 09:15 Thavanga Fiji  0.1
24 Feb 2020 18:15 Naruwai Fiji  0.1
24 Feb 2020 18:15 Ndaria Fiji  0.1
25 Feb 2020 05:30 Keteira Fiji  0.1
23 Feb 2020 08:00 Nabouwalu Fiji  0.1
24 Feb 2020 18:30 Nasau Fiji  0.1
24 Feb 2020 18:30 Talaulia Fiji  0.1
24 Feb 2020 18:30 Nalotu Fiji  0.1
24 Feb 2020 18:30 Vunisea Fiji  0.1
24 Feb 2020 18:30 Mburelevu Fiji  0.1
24 Feb 2020 18:30 Mokoisa Fiji  0.1
24 Feb 2020 18:30 Naikorokoro Fiji  0.1
24 Feb 2020 18:30 Namara Fiji  0.1
24 Feb 2020 18:30 Gasele Fiji  0.1
24 Feb 2020 18:15 Korovisilou Fiji  0.1
23 Feb 2020 08:00 Kavala Fiji  0.1
23 Feb 2020 08:00 Vabea Fiji  0.1
24 Feb 2020 18:15 Bouwanga Fiji  0.1
24 Feb 2020 18:15 Taunovo Fiji  0.1
23 Feb 2020 08:00 Kaduvu Fiji  0.1
23 Feb 2020 08:00 Nukuvou Fiji  0.1
24 Feb 2020 18:30 Soso Fiji  0.1
21 Feb 2020 22:45 Mbukama Fiji  0.1
21 Feb 2020 22:45 Yasawairara Fiji  0.1
23 Feb 2020 20:45 Nasea Fiji  0.1
24 Feb 2020 18:15 Korolevu Fiji  0.1
23 Feb 2020 21:00 Vunivatu Fiji  0.1
23 Feb 2020 21:00 Navukembuli Fiji  0.1
23 Feb 2020 21:00 Naua Fiji  0.1
24 Feb 2020 18:15 Vatukarasa Fiji  0.1
21 Feb 2020 22:15 Makongai Fiji  0.1
25 Feb 2020 05:45 Dalice Fiji  0.1
25 Feb 2020 06:15 Korovou Fiji  0.1
25 Feb 2020 06:15 Navakawau Fiji  0.1
23 Feb 2020 08:15 Sawaieke Fiji  0.1
23 Feb 2020 08:15 Vione Fiji  0.1

Calculation folder at this link