Overall Red alert Tropical Cyclone for MAWAR-23
in Guam

Impact

Tropical Cyclone MAWAR-23 can have a high humanitarian impact based on the maximum sustained wind speed,exposed population and vulnerability.

Meteorological source GDACS
Glide number: TC-2023-000077-GUM
Exposed countries Guam
Exposed population 170 thousand in Category 1 or higher
Maximum wind speed 296 km/h
Maximum storm surge 0.8 m (24 May 08:00 UTC)
Vulnerability Medium (Guam)

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
Current 93 km/h 0.8 m n.a. 0.5
Overall 296 km/h 0.8 m n.a. 2.5

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

Wind

93 km/h Current Max.

Up to 2.4 million people in Tropical Storm 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
Countries
Orange 1 20 May 2023 00:00 167 230 thousand 50 thousand Northern Mariana Islands
Orange 2 20 May 2023 06:00 157 230 thousand 30 thousand Guam, Northern Mariana Islands
Orange 3 20 May 2023 12:00 167 230 thousand 50 thousand Guam, Northern Mariana Islands
Orange 4 20 May 2023 18:00 167 230 thousand 170 thousand Guam
Orange 5 21 May 2023 00:00 176 230 thousand 170 thousand Guam
Orange 6 21 May 2023 06:00 167 230 thousand 170 thousand Guam
Orange 7 21 May 2023 12:00 176 230 thousand 170 thousand Guam
Orange 8 21 May 2023 18:00 176 230 thousand 170 thousand Guam
Red 9 22 May 2023 00:00 185 230 thousand 170 thousand Guam
Red 10 22 May 2023 06:00 204 230 thousand 170 thousand Guam
Red 11 22 May 2023 12:00 194 230 thousand 160 thousand Guam
Red 12 22 May 2023 18:00 222 230 thousand 170 thousand Guam
Red 13 23 May 2023 00:00 231 230 thousand 170 thousand Guam
Red 14 23 May 2023 06:00 259 230 thousand 170 thousand Guam
Red 15 23 May 2023 12:00 259 230 thousand 170 thousand Guam
Red 16 23 May 2023 18:00 231 380 thousand 170 thousand Guam
Red 17 24 May 2023 00:00 222 340 thousand 170 thousand Guam
Red 18 24 May 2023 06:00 222 240 thousand 170 thousand Guam
Red 19 24 May 2023 12:00 222 490 thousand 170 thousand Guam
Red 20 24 May 2023 18:00 241 320 thousand 170 thousand Guam
Green 21 25 May 2023 00:00 269 500 thousand 170 thousand Guam
Green 22 25 May 2023 06:00 278 1.3 million 170 thousand Guam
Green 23 25 May 2023 12:00 287 2.5 million 170 thousand Guam
Green 24 25 May 2023 18:00 287 3.5 million 170 thousand Guam
Green 25 26 May 2023 00:00 296 470 thousand 170 thousand Guam
Green 26 26 May 2023 06:00 287 450 thousand 170 thousand Guam
Green 27 26 May 2023 12:00 269 480 thousand 170 thousand Guam
Green 28 26 May 2023 18:00 269 1.6 million 170 thousand Guam
Green 29 27 May 2023 00:00 250 2.6 million 170 thousand Guam
Green 30 27 May 2023 06:00 250 7.9 million 170 thousand Guam
Green 31 27 May 2023 12:00 241 14.2 million 170 thousand Guam
Green 32 27 May 2023 18:00 222 23.3 million 170 thousand Guam
Green 33 28 May 2023 00:00 204 8.3 million 170 thousand Guam
Green 34 28 May 2023 06:00 194 28.1 million 170 thousand Guam
Green 35 28 May 2023 12:00 194 5.1 million 230 thousand Japan, Guam
Green 36 28 May 2023 18:00 194 10.4 million 270 thousand Japan, Guam
Green 37 29 May 2023 00:00 194 16.1 million 230 thousand Japan, Guam
Green 38 29 May 2023 06:00 194 11.1 million 220 thousand Japan, Guam
Green 39 29 May 2023 12:00 185 3.4 million 170 thousand Japan, Guam
Green 40 29 May 2023 18:00 167 2.2 million 170 thousand Japan, Guam
Green 41 30 May 2023 00:00 148 1.9 million 170 thousand Guam
Green 42 30 May 2023 06:00 139 2.2 million 170 thousand Guam
Green 43 30 May 2023 12:00 130 1.8 million 170 thousand Guam
Green 44 30 May 2023 18:00 120 2.5 million 170 thousand Guam
Green 45 31 May 2023 00:00 111 1.9 million 170 thousand Guam
Green 46 31 May 2023 06:00 120 13.4 million 170 thousand Guam
Green 47 31 May 2023 12:00 120 1.9 million 170 thousand Guam
Green 48 31 May 2023 18:00 111 2.7 million 170 thousand Guam
Green 49 01 Jun 2023 00:00 102 2.9 million 170 thousand Guam
Green 50 01 Jun 2023 06:00 93 29.4 million 170 thousand Guam
Green 51 01 Jun 2023 12:00 93 2.4 million 170 thousand Guam

Bulletin Timeline

Alert Date (UTC) Category
(SSHS)
Max winds
(km/h)
Population in
Cat.1 or higher
Population in
Tropical Storm
or higher
Location (lat, lon) Countries
GREEN
1 20 May 2023 00:00 Tropical depression 46 no people 2400 people 5.4, 149.1
GREEN
2 20 May 2023 06:00 Tropical depression 56 no people 2400 people 5.7, 149.2
GREEN
3 20 May 2023 12:00 Tropical storm 65 no people 4400 people 5.7, 149.3
GREEN
4 20 May 2023 18:00 Tropical storm 83 no people 4400 people 6.1, 149.2
GREEN
5 21 May 2023 00:00 Tropical storm 93 no people 5500 people 6.8, 149.2
GREEN
6 21 May 2023 06:00 Tropical storm 111 no people 6000 people 7.6, 148.7
GREEN
7 21 May 2023 12:00 Category 1 130 <1000 people 2700 people 8, 148.3
GREEN
8 21 May 2023 18:00 Category 1 139 no people <1000 people 8.5, 148.1
GREEN
9 22 May 2023 00:00 Category 2 157 no people <1000 people 9.1, 147.7
GREEN
10 22 May 2023 06:00 Category 2 167 no people <1000 people 9.5, 147
GREEN
11 22 May 2023 12:00 Category 2 167 no people <1000 people 10, 146.9
GREEN
12 22 May 2023 18:00 Category 3 204 no people no people 10.5, 146.8
GREEN
13 23 May 2023 00:00 Category 4 213 no people 170000 people 11.2, 146.9
GREEN
14 23 May 2023 06:00 Category 4 250 no people 220000 people 11.8, 146.5
RED
15 23 May 2023 12:00 Category 4 250 170000 people 220000 people 12.2, 146.1
RED
16 23 May 2023 18:00 Category 4 222 170000 people 220000 people 12.5, 145.7
RED
17 24 May 2023 00:00 Category 4 222 170000 people 220000 people 13, 145.5
RED
18 24 May 2023 06:00 Category 4 222 170000 people 220000 people 13.6, 145.2
RED
19 24 May 2023 12:00 Category 4 222 170000 people 220000 people 13.8, 144.7
RED
20 24 May 2023 18:00 Category 4 241 76000 people 220000 people 14.1, 144.1
GREEN
21 25 May 2023 00:00 Category 4 250 no people 220000 people 14.3, 143.5
GREEN
22 25 May 2023 06:00 Category 5 269 no people 220000 people 14.5, 142.8
GREEN
23 25 May 2023 12:00 Category 5 278 no people no people 14.7, 141.6
GREEN
24 25 May 2023 18:00 Category 5 287 no people no people 14.9, 140.5
GREEN
25 26 May 2023 00:00 Category 5 296 no people no people 15.1, 139.3
GREEN
26 26 May 2023 06:00 Category 5 287 no people no people 15.3, 138
GREEN
27 26 May 2023 12:00 Category 5 269 no people no people 15.7, 136.5
GREEN
28 26 May 2023 18:00 Category 5 269 no people no people 16.1, 134.8
GREEN
29 27 May 2023 00:00 Category 4 250 no people no people 16.4, 133.3
GREEN
30 27 May 2023 06:00 Category 4 250 no people no people 16.6, 132.2
GREEN
31 27 May 2023 12:00 Category 4 241 no people no people 16.8, 130.9
GREEN
32 27 May 2023 18:00 Category 4 222 no people no people 17, 129.7
GREEN
33 28 May 2023 00:00 Category 3 204 no people 87000 people 17.3, 128.7
GREEN
34 28 May 2023 06:00 Category 3 194 no people no people 17.5, 127.9
GREEN
35 28 May 2023 12:00 Category 3 194 no people 32000 people 17.9, 127.3
GREEN
36 28 May 2023 18:00 Category 3 194 no people 210000 people 18.5, 126.9
GREEN
37 29 May 2023 00:00 Category 3 194 no people 140000 people 19.1, 126.2
GREEN
38 29 May 2023 06:00 Category 3 194 no people 300000 people 19.4, 125.8
GREEN
39 29 May 2023 12:00 Category 3 185 no people 110000 people 19.7, 125.6
GREEN
40 29 May 2023 18:00 Category 2 167 no people 91000 people 20.1, 125.4
GREEN
41 30 May 2023 00:00 Category 1 148 no people 22000 people 20.4, 125.1
GREEN
42 30 May 2023 06:00 Category 1 139 no people 72000 people 20.5, 125
GREEN
43 30 May 2023 12:00 Category 1 130 no people 120000 people 20.7, 125
GREEN
44 30 May 2023 18:00 Category 1 120 no people 130000 people 21.1, 125
GREEN
45 31 May 2023 00:00 Tropical storm 111 no people 120000 people 21.5, 125.2
GREEN
46 31 May 2023 06:00 Category 1 120 no people 5.4 million people 22.3, 125.3
GREEN
47 31 May 2023 12:00 Category 1 120 no people 1.3 million people 22.7, 125.5
GREEN
48 31 May 2023 18:00 Tropical storm 111 no people 1.5 million people 23.5, 125.6
GREEN
49 01 Jun 2023 00:00 Tropical storm 102 no people 1.5 million people 24.2, 125.9
GREEN
50 01 Jun 2023 06:00 Tropical storm 93 no people 1.5 million people 25, 126.2
GREEN
51 01 Jun 2023 12:00 Tropical storm 93 no people 1.5 million people 25.8, 127.1
GREEN
51 02 Jun 2023 00:00 Tropical storm 93 no people 1.5 million people 27.1, 129.4
GREEN
51 02 Jun 2023 12:00 Tropical storm 83 no people 120000 people 28.3, 132.6
GREEN
51 03 Jun 2023 00:00 Tropical storm 83 no people 290000 people 29.9, 136.6
GREEN
51 03 Jun 2023 12:00 Tropical storm 83 no people 500000 people 32.4, 141.7
GREEN
51 04 Jun 2023 12:00 Tropical storm 74 no people no people 38.6, 154.7
Actual track of the current bulletin
The alert for forecast greater than 3 days is limited to Orange level.
Download:



Exposed population - AoIs

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

Countries

Country Population in Tropical Storm or higher strength
Japan 1.7 million people
China 7400 people
Philippines 56000 people
Northern Mariana Is. 46000 people
Guam 170000 people

Provinces

Region Province Country Population in Tropical Storm or higher strength
Okinawa Japan 1.1 million people
Kyushu Japan 110000 people
Taiwan China 7400 people
Cagayan Valley Philippines 56000 people
Chubu Japan 36000 people
Kanto Japan 420000 people
Northern Mariana Is. Northern Mariana Islands 46000 people
Guam Guam 170000 people

Populated places

Name Region Province Country City class Population
Naha Okinawa Japan City 300000 people
Ishigaki Okinawa Japan City 45000 people
Mitsune Shizuoka Japan City -
Tateyama Chiba Japan City 49000 people
Chikura Chiba Japan City -
Ohara Chiba Japan City 20000 people
Mobara Chiba Japan City 96000 people
Katakai Chiba Japan City -
Choshi Chiba Japan City 84000 people
Saipan Northern Mariana Islands Capital 62000 people
Hagåtña Guam Capital 1000 people

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)
Naha OKA 5 Civ. Paved Yes 9800
Kumejima UEO 7 Civ. Paved Yes 6500
Futenma Mcas 75 Mil. Paved Yes 9000
Kadena AB DNA 45 Mil. Paved Yes 12100
Ie Jima IEJ 75 Civ. Paved No 4900
Yoron RNJ 16 Civ. Paved Yes 3900
Hirara MMY 45 Civ. Paved Yes 6500
Shimojishima SHI 16 Civ. Paved Yes 9800
Okierabu OKE 31 Civ. Paved Yes 3900
9 0
Tokunoshima TKN 5 Civ. Paved Yes 6500
Ishigaki ISG 26 Civ. Paved Yes 4900
Iriomote Jima 12 0
Hateruma HTR unknown 0
Amami O Shima ASJ 8 Civ. Paved Yes 6500
Kikai 6 Civ. Paved Yes 3900
Minami Daito MMD 4 Civ. Paved Yes 4900
Kitadaito KTD 24 Civ. Paved Yes 4900
Yonaguni OGN 21 Civ. Paved Yes 4900
Yakushima KUM 37 Civ. Paved Yes 4900
Tanegashima TNE 97 Civ. Paved Yes 4900
Nishinoomote IIN unknown 0
Basco BSO 56 Civ. Paved No 4100
Hachijo Jima HAC 92 Civ. Paved Yes 5900
29 0
Miyake Jima MYE 20 Civ. Paved Yes 3900
Oshima OIM 40 Civ. Paved Yes 3900
Tateyama 3 0
Commonwealth Health Center 5 0
Nikko 18 0
West Tinian TIQ 82 Civ. Paved Yes 5900
Saipan International SPN 66 Civ. Paved Yes 8700
Dynasty 46 0
Rota I International ROP 185 Civ. Paved Yes 6000
A.B. Won Pat International GUM 91 0
Andersen AFB UAM 191 0

Ports

Name LOCODE Country
Naha JPNAH Japan
Kume Island Japan
Nishihara JPNHR Japan
Nakagusuku Wan Japan
Heianza JPHEI Japan
Kin Wan JPKIN Japan
Oku Japan
Myako Island Japan
Hirara Japan
Ishigaki Island Japan
Ishigaki Japan
Irionote Island Japan
Kita Japan
Okino Japan
Tokara Island Japan
Basco Philippines
Port San Vicente Philippines
Tori Island Japan
Aoga Island Japan
Yaene Japan
Kozu Island Japan
Mikura Japan
Miyake Japan
Shimoda JPSMD Japan
Nii Japan
Oshima JPOSM Japan
Tateyama JPTTY Japan
Katsuura Ko Japan
Choshi JPCHO Japan
Guguan Island Northern Mariana Islands
Farallon de Medinilla Northern Mariana Islands
Saipan MPSPN Northern Mariana Islands
Tinian Northern Mariana Islands
Rota Northern Mariana Islands
Apra Harbor Guam
Apra (Agana) GUAPR Guam

Dams

Reservoir Dam Name River Year
Zukeyama Kurashiki Yonabarugawa 1995
Okukubi Okukubigawa 2001
Kannako Kanna Kannafukujigawa 1993
Sokobaru Sokobaru Sokobarugawa 1992
Maezato Maezato Miyaragawa 1982
Nagura Nagura Naguragawa 1996
Saikyo Saikyo Matanobugawa 1984
Sakuma Sakuma Okuzuregawa 1990
Kameyamako Kameyama Obitsugawa 1980
Takatakiko Takataki Yorogawa 1990

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

0.8 m

The maximum Storm surge height is  0.8m in Camp Quezon, Guam. This height is estimated for 24 May 2023 08:00 UTC .

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 (43 locations). Calculation based on advisory number 20 of 24 May 2023 18:00:00 UTC. (Simulation using 0.5 minute resolution)

Alert Date (UTC) Name Country Storm surge height (m)
24 May 2023 08:00 Camp Quezon Guam  0.8
24 May 2023 08:00 Harmon Village Guam  0.8
24 May 2023 08:00 Oceanview Guam  0.8
24 May 2023 08:00 Dededo Guam  0.8
24 May 2023 08:00 South Acres Guam  0.8
24 May 2023 08:00 Asbeco Guam  0.8
24 May 2023 08:00 Adacao Guam  0.8
24 May 2023 08:00 Ipapao Guam  0.8
24 May 2023 08:00 Potts Junction Guam  0.8
24 May 2023 08:00 Perez Acres Guam  0.8
24 May 2023 08:00 Spring Hill Subdivision Guam  0.8
24 May 2023 08:00 Upi Guam  0.8
24 May 2023 07:00 Gayinero Guam  0.8
24 May 2023 07:00 Asatdas Guam  0.8
24 May 2023 07:00 Lupog Guam  0.8
24 May 2023 09:00 Asan Guam  0.7
24 May 2023 09:00 Hagatna Guam  0.7
24 May 2023 09:00 Sinajana Guam  0.7
24 May 2023 09:00 Mongmong Guam  0.7
24 May 2023 09:00 Yona Guam  0.7
24 May 2023 09:00 Tamuning Guam  0.7
24 May 2023 09:00 Barrigada Guam  0.7
24 May 2023 10:00 Lockwood Terrace Guam  0.6
24 May 2023 10:00 Camp Bright Guam  0.6
24 May 2023 10:00 Piti Guam  0.6
24 May 2023 09:00 Talofofo Guam  0.4
24 May 2023 09:00 Ylig Guam  0.4
24 May 2023 09:00 Agat Guam  0.4
24 May 2023 09:00 Santa Rita Guam  0.4
24 May 2023 08:00 Inarajan Guam  0.3
24 May 2023 10:00 Songsong Northern Mariana Islands  0.3
24 May 2023 10:00 Teteto Northern Mariana Islands  0.3
24 May 2023 09:00 Rota Northern Mariana Islands  0.3
24 May 2023 09:00 Sinapalo Northern Mariana Islands  0.3
24 May 2023 09:00 Umatac Guam  0.2
24 May 2023 09:00 Merizo Guam  0.2
28 May 2023 09:00 Wright Philippines  0.1
28 May 2023 08:00 Pequit Philippines  0.1
28 May 2023 08:00 Pabanong Philippines  0.1
28 May 2023 08:00 Hinabangan Philippines  0.1
28 May 2023 08:00 Bangon Philippines  0.1
28 May 2023 04:00 Mualbual Philippines  0.1
28 May 2023 09:00 Catbalogan Philippines  0.1