Overall Red alert Tropical Cyclone for YUTU-18
in Philippines, Northern Mariana Islands

Impact

Tropical Cyclone YUTU-18 can have a high humanitarian impact based on the maximum sustained wind speed,exposed population and vulnerability.

Meteorological source GDACS (JTWC)
Exposed countries Philippines, Northern Mariana Islands
Exposed population 11 million in Category 1 or higher
Maximum wind speed 287 km/h
Maximum storm surge 0.3 m (25 Oct 09:00 UTC)
Vulnerability Medium (Northern Mariana Is.)

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
GDACS Current 204 km/h 0.3 m n.a. 2.5
GDACS Overall 287 km/h 0.3 m n.a. 2.5

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

Wind

204 km/h Current

Up to 49000 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
Countries
Green 1 21 Oct 2018 12:00 231 210 thousand 2 thousand Northern Mariana Islands
Red 2 21 Oct 2018 18:00 204 210 thousand 50 thousand Northern Mariana Islands
Red 3 22 Oct 2018 00:00 204 210 thousand 50 thousand Northern Mariana Islands

Bulletin Timeline

Alert Date (UTC) Category Max winds
(km/h)
Population in
Tropical Storm
Population in
Cat.1 or higher
Location (lat, lon) Countries
GREEN
1 21 Oct 2018 12:00 Tropical depression 46 <1000 people no people 8.4, 157.6
GREEN
2 21 Oct 2018 18:00 Tropical depression 56 <1000 people no people 8.6, 156.8
GREEN
3 22 Oct 2018 00:00 Tropical storm 65 no people no people 9, 155.9
GREEN
3 22 Oct 2018 12:00 Tropical storm 83 <1000 people no people 9.8, 154.6
GREEN
3 23 Oct 2018 00:00 Tropical storm 111 <1000 people no people 10.7, 152.9
GREEN
3 23 Oct 2018 12:00 Category 1 139 no people no people 11.8, 151.4
GREEN
3 24 Oct 2018 00:00 Category 2 167 210000 people no people 13, 149.6 Guam
RED
3 25 Oct 2018 00:00 Category 3 204 210000 people 49000 people 14.9, 146.7 Northern Mariana Islands
GREEN
3 26 Oct 2018 00:00 Category 4 231 51000 people no people 16.8, 144.5 Guam
GREEN
3 27 Oct 2018 00:00 Category 4 250 no people no people 19.2, 142.4
Actual track of the current bulletin
The alert for forecast greater than 3 days is limited to Orange level.



Exposed population

Countries

Country
Northern Mariana Is.

Provinces

Region Province Country Population
Northern Mariana Is. Northern Mariana Islands 60000 people

Populated places

Name Region Province Country City class Population Distance
Saipan Northern Mariana Islands Capital 62000 people 1298 km

Critical infrastructure

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

Airports

Name IATA Code Elevation (m) Usage Runway type IFR Runway Length (ft) Distance
Dynasty 46 0 1297 km
Saipan International SPN 66 Civ. Paved Yes 8700 1297 km
Nikko 18 0 1300 km
West Tinian TIQ 82 Civ. Paved Yes 5900 1301 km
Commonwealth Health Center 5 0 1303 km

Ports

Name LOCODE Country Distance
Tinian Northern Mariana Islands 1299 km
Saipan MPSPN Northern Mariana Islands 1303 km
Farallon de Medinilla Northern Mariana Islands 1320 km

Rainfall

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.

...

StormSurge

0.3 m

The maximum Storm surge height is  0.3m in Garapan, Northern Mariana Islands. This height is estimated for 25 Oct 2018 09:00 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 (12 locations). Calculation based on advisory number 3 of 22 Oct 2018 00:00:00 UTC. (Simulation using 0.5 minute resolution)

Alert Date (UTC) Name Country Storm surge height (m)
25 Oct 2018 09:00 Garapan Northern Mariana Islands  0.3
25 Oct 2018 09:00 Mutcho Northern Mariana Islands  0.3
25 Oct 2018 09:00 Tanapag Northern Mariana Islands  0.3
25 Oct 2018 09:00 San Roque Northern Mariana Islands  0.3
25 Oct 2018 07:00 Aslito Northern Mariana Islands  0.2
25 Oct 2018 07:00 Afetna Northern Mariana Islands  0.2
25 Oct 2018 07:00 Susupi Northern Mariana Islands  0.2
25 Oct 2018 07:00 Laolao Northern Mariana Islands  0.2
25 Oct 2018 07:00 Chalan Kanoa Northern Mariana Islands  0.2
25 Oct 2018 07:00 Kagman Northern Mariana Islands  0.2
25 Oct 2018 07:00 Saipan Northern Mariana Islands  0.2
25 Oct 2018 07:00 Sunharon Roads Northern Mariana Islands  0.1