Overall Red alert Tropical Cyclone for MAWAR-23
in Guam
20 May 2023 06 UTC
click on to select bulletin time
  • GDACS JTWC
Impact Single TC
Impact based on all weather systems in the area

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
    Exposed countries Guam
    Exposed population 170 thousand in Category 1 or higher
    Maximum wind speed 296 km/h
    Maximum storm surge 0.2 m (24 May 00:00 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 157 km/h 0.2 m n.a. 1.5
    Overall 296 km/h 0.2 m n.a. 1.5

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

    TOP

    Wind

      157 km/h Current Max.

      Up to 25000 people in Category 1 strength or higher (see SSHS)

      Impact Timeline

        Alert N° 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

        Bulletin Timeline

          Alert N° 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
          		 2 20 May 2023 18:00 Tropical storm 83 no people 5900 people 6.6, 148.7
          GREEN
          		 2 21 May 2023 06:00 Tropical storm 102 no people 6000 people 7.5, 148.2
          GREEN
          		 2 21 May 2023 18:00 Category 1 120 no people 4200 people 8.5, 147.7
          GREEN
          		 2 22 May 2023 06:00 Category 1 139 no people 170000 people 10.1, 147.2
          ORANGE
          		 2 23 May 2023 06:00 Category 2 157 26000 people 220000 people 12.6, 146.3
          GREEN
          		 2 24 May 2023 06:00 Category 2 176 3400 people 220000 people 15.1, 144.8
          GREEN
          		 2 25 May 2023 06:00 Category 3 185 no people no people 16.7, 142
          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
          Guam 3200 people
          Northern Mariana Is. 20000 people

          Provinces

          Region Province Country Population in Tropical Storm or higher strength
          Guam Guam 3200 people
          Northern Mariana Is. Northern Mariana Islands 20000 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)
          Andersen AFB UAM 191 0
          Rota I International ROP 185 Civ. Paved Yes 6000
          Dynasty 46 0
          West Tinian TIQ 82 Civ. Paved Yes 5900
          Saipan International SPN 66 Civ. Paved Yes 8700

          Ports

          Name LOCODE Country
          Rota Northern Mariana Islands
          Tinian Northern Mariana Islands
          TOP

          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.

          ...

          TOP

          StormSurge

          0.2 m

          The maximum Storm surge height is  0.2m in Sunharon Roads, Northern Mariana Islands. This height is estimated for 24 May 2023 00:00 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 (41 locations). Calculation based on advisory number 1 of 20 May 2023 00:00:00 UTC. (Simulation using 0.5 minute resolution)

          Alert Date (UTC) Name Country Storm surge height (m)
          24 May 2023 00:00 Sunharon Roads Northern Mariana Islands  0.2
          24 May 2023 00:00 Chalan Kanoa Northern Mariana Islands  0.2
          24 May 2023 00:00 Aslito Northern Mariana Islands  0.2
          23 May 2023 19:00 Songsong Northern Mariana Islands  0.2
          24 May 2023 00:00 Afetna Northern Mariana Islands  0.2
          24 May 2023 00:00 Susupi Northern Mariana Islands  0.2
          24 May 2023 00:00 Laolao Northern Mariana Islands  0.2
          24 May 2023 00:00 Saipan Northern Mariana Islands  0.2
          23 May 2023 21:00 Teteto Northern Mariana Islands  0.2
          23 May 2023 21:00 Sinapalo Northern Mariana Islands  0.2
          23 May 2023 21:00 Rota Northern Mariana Islands  0.1
          24 May 2023 00:00 Tanapag Northern Mariana Islands  0.1
          24 May 2023 00:00 Kagman Northern Mariana Islands  0.1
          24 May 2023 00:00 Garapan Northern Mariana Islands  0.1
          24 May 2023 00:00 Mutcho Northern Mariana Islands  0.1
          24 May 2023 00:00 San Roque Northern Mariana Islands  0.1
          23 May 2023 12:00 Asan Guam  0.1
          23 May 2023 12:00 Hagatna Guam  0.1
          23 May 2023 12:00 Sinajana Guam  0.1
          23 May 2023 12:00 Mongmong Guam  0.1
          23 May 2023 12:00 Yona Guam  0.1
          23 May 2023 12:00 Tamuning Guam  0.1
          23 May 2023 12:00 Barrigada Guam  0.1
          23 May 2023 12:00 Camp Quezon Guam  0.1
          23 May 2023 12:00 Harmon Village Guam  0.1
          23 May 2023 12:00 Oceanview Guam  0.1
          23 May 2023 12:00 Dededo Guam  0.1
          23 May 2023 12:00 South Acres Guam  0.1
          23 May 2023 12:00 Asbeco Guam  0.1
          23 May 2023 12:00 Adacao Guam  0.1
          23 May 2023 12:00 Ipapao Guam  0.1
          23 May 2023 12:00 Potts Junction Guam  0.1
          23 May 2023 12:00 Perez Acres Guam  0.1
          23 May 2023 12:00 Gayinero Guam  0.1
          23 May 2023 12:00 Spring Hill Subdivision Guam  0.1
          23 May 2023 12:00 Upi Guam  0.1
          23 May 2023 12:00 Asatdas Guam  0.1
          23 May 2023 12:00 Lupog Guam  0.1
          23 May 2023 17:00 Lockwood Terrace Guam  0.1
          23 May 2023 17:00 Camp Bright Guam  0.1
          23 May 2023 17:00 Piti Guam  0.1