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Overall Green Tropical Cyclone alert for ARLENE-17 from 19 Apr 2017 15:00 UTC to 21 Apr 2017 09:00 UTC
GDACS Event Report - Summary


The map shows the accumulated precipitation along the cyclone's track. Yellow area is > 100mm; Red area is > 300mm; Blue area is > 500mm. The accumulated rainfall is calculated based on the Tropical Rainfall Potential of NOAA/NESDIS. The eTRaP is a simple ensemble whose members are the 6-hourly totals from the single-orbit TRaPs, which are rainfall estimates from passive microwave remote sensing. Rain map with eTraP data. (Source: JRC)

Tropical Cyclone ARLENE-17 can have a low humanitarian impact based on the Maximum sustained wind speed and the affected population and their vulnerability.

Updated: this report is based on advisory number 8.

  • Tropical Cyclone Tropical Storm (maximum wind speed of 83 km/h)
  • from 19 Apr 2017 15:00 UTC to 21 Apr 2017 09:00 UTC
  • Population affected by Category 1 (120 km/h) wind speeds or higher is 0
  • inserted at 21 Apr 2017 06:48:14 UTC

Extreme Rain

Potential rainfall is calculated based on rainfall observed by several microwave satellite sensors.

The image shows the total rainfall accumulation associated with the cyclone.

Storm surge

The tropical cyclone did not reach sufficient strength to cause significant storm surge.


Known identifiers for this event: AL012017 (NOAAid)

Latest media headlines

Articles: 134 | About casualties: 0 | Last hour: 0

April storm 'Arlene' sets Atlantic record
Mon, 24 Apr 2017 12:56:00 +0200   aljazeera-en (en)

We recently reported on the rare sight of a subtropical depression forming in the Atlantic Basin, long before the official hurricane season, which does not begin until June 1. Well, not only did this subtropical depression persist despite chilly ocean temperatures of just 20 degrees Celsius, it actually formed into a tropical storm on April 20.

People and organisations:

Tropical Storm Arlene spins up in the Atlantic, two months before average date of first storm of hurricane season
Sat, 22 Apr 2017 08:17:00 +0200   headlines24 (en)

. 22/04 07:30 - Tropical Storm Arlene spins up in the Atlantic, two months before average date of first storm of hurricane season Is climate change playing any role in an apparent lengthening of the hurricane season? It's way early for hurricane season to start, but that's precisely what happened....

People and organisations:

Arlene First Storm of 2017 Atlantic Hurricane Season – But Not For Long
Sat, 22 Apr 2017 05:34:00 +0200   caribbean360 (en)

FLORIDA, United States, Friday April 21, 2017 – She didn’t stick around for very long, but Arlene yesterday became the first storm of the 2017 Atlantic hurricane season – more than a month before the official start. The subtropical depression that had been lingering between Bermuda and the Azores....

People and organisations:

More news...

Data, images, links, services and documents

For this events, GDACS has links to information from the following sources: EMM (1), JRC (119), BOM (1), JTWC (1), (1), NASA (1), NOAA (3), OCHA (1), TRMM (1), Unisys (1),

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Further information and official advisories can be found at the Severe Weather Information Centre of the World Meteorological Organization, by clicking on the Tropical Cyclone symbols on the world map of the site.