Overall Green alert Tropical Cyclone for DAHLIA-17
in Indonesia, Christmas Island
alertimage

Green alert for storm surge impact based on GFS source

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.

This report is for advisory number 16 of tropical cyclone DAHLIA-17 issued at 3 Dec 2017 18:00:00 (GDACS Event ID 1000423). However, the calculation for advisory number is not completed. Therefore, the latest available calculation is shown. All links, data, statistics and maps refer to the latest available calculation.

Summary

Population affected by cyclone-strength winds (>120km/h):No People
Saffir-Simpson Category: Tropical depression
Maximum sustained wind speed: 56 Km/h
Maximum Storm surge height is:  0.6m in Pardoo, Australia.

Storm surge

View animation and affected locations in an interactive map: open

Storm surge maximum height
Storm surge maximum height (Source: JRC)
Max windspeed
Max windspeed (Source: GFS)

Evolution

Legend
people affected <=10000
people affected >10000 and <100000
people affected >100000


Calculation Alert color Date (UTC) Wind speed Population affected
winds(>120km/h)
TS CAT. 1 CAT. 2 CAT. 3 CAT. 4 CAT. 5 Countries
1
GREEN
20171130.00 67 km/h (41 mph) No people
Indonesia
2
GREEN
20171130.06 75 km/h (46 mph) No people
Indonesia
3
GREEN
20171130.12 65 km/h (40 mph) No people
Indonesia
4
GREEN
20171130.18 110 km/h (68 mph) No people
5
GREEN
20171201.00 137 km/h (85 mph) No people affected
6
GREEN
20171201.06 99 km/h (61 mph) No people
7
GREEN
20171201.12 104 km/h (64 mph) No people
8
GREEN
20171201.18 107 km/h (66 mph) No people
9
GREEN
20171202.00 114 km/h (70 mph) No people
10
GREEN
20171202.06 79 km/h (49 mph) No people
11
GREEN
20171202.12 76 km/h (47 mph) No people
12
GREEN
20171202.18 60 km/h (37 mph) No people
13
GREEN
20171203.00 57 km/h (35 mph) No people
14
GREEN
20171203.06 54 km/h (34 mph) No people
15
GREEN
20171203.12 56 km/h (35 mph) No people
16
GREEN
20171203.18 59 km/h (37 mph) No people
17
GREEN
20171204.00 59 km/h (36 mph) No people
18
GREEN
20171204.06 55 km/h (34 mph) No people
19
GREEN
20171204.12 56 km/h (35 mph) No people
20
GREEN
20171204.18 56 km/h (35 mph) No people

Affected locations

Date Name Country Alert Storm surge height (m)
01 Dec 2017 06:15:00 Pardoo Australia  0.6m
01 Dec 2017 06:00:00 Condon Australia  0.5m
01 Dec 2017 07:45:00 Port Hedland Australia  0.4m
02 Dec 2017 18:00:00 Dampier Australia  0.4m
02 Dec 2017 18:00:00 Karratha Australia  0.4m
30 Nov 2017 23:15:00 Djomblang Indonesia  0.3m
30 Nov 2017 23:15:00 Semarang Indonesia  0.3m
30 Nov 2017 23:15:00 Karangroto Indonesia  0.3m
30 Nov 2017 23:15:00 Wedung Indonesia  0.3m
30 Nov 2017 23:15:00 Kedungmalang Indonesia  0.3m
30 Nov 2017 23:15:00 Mangkang-Kulan Indonesia  0.3m
01 Dec 2017 08:00:00 Mardie Australia  0.3m
30 Nov 2017 03:15:00 Lais Indonesia  0.3m
30 Nov 2017 03:15:00 Baru Indonesia  0.3m
Locations affected by Storm surge (15 of 677)
Calculation based on advisory number of 05 Dec 2017 12:00.
(Simulation using minute resolution)

See full locations list (RSS)

More information

The atmospheric forcing included in the storm surge model are the pressure drop and the wind-water friction. The effects of the short waves induced by the wind (wave setup) and the precipitations are not yet implemented in the model.

  • Interactive map: open

For a full list of available products related to this event, please refer to the GDACS Resources page.