Overall Green alert Tropical Cyclone for HENRI-21
in United States
21 Aug 2021 00 UTC
click on to select bulletin time
Impact Single TC
Impact based on all weather systems in the area

Impact

Tropical Cyclone HENRI-21 can have a low humanitarian impact based on the maximum sustained wind speed,exposed population and vulnerability.

Meteorological source HWRF
Exposed countries United States
Exposed population No people in Category 1 or higher
Maximum wind speed 119 km/h
Maximum storm surge 0.2 m (21 Aug 03:45 UTC)
Vulnerability Low (United States)

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
HWRF Current 119 km/h 0.2 m 180 mm 0.5
HWRF Overall 166 km/h 0.8 m 488 mm 0.5

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

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Wind



Wind exposed population - AoIs

Estimations based on the bulletin of 21 Aug 2021 00:00 UTC
CategoryCountryPopulation 
Tropical StormUnited States361,934 

See TC classification SSHS


Wind Impact Timeline

people affected <=10000
10000< people affected <=100000
people affected >100000


Alert N° Date (UTC) Max Winds (km/h) Pop in Cat. 1 or higher TS Cat. 1 Cat. 2 Cat. 3 Cat. 4 Cat. 5 Countries
GREEN 1 16 Aug 2021 00:00 72 - - - - - - -
GREEN 2 16 Aug 2021 06:00 68 - - - - - - -
GREEN 3 16 Aug 2021 12:00 79 - - - - - - -
GREEN 4 16 Aug 2021 18:00 83 - - - - - - -
GREEN 5 17 Aug 2021 00:00 83 - - - - - - -
GREEN 6 17 Aug 2021 06:00 122 - - - - - - -
GREEN 7 17 Aug 2021 12:00 90 - - - - - - -
GREEN 8 17 Aug 2021 18:00 112 - - - - - - -
GREEN 9 18 Aug 2021 00:00 112 - - - - - - -
GREEN 10 18 Aug 2021 06:00 97 - - - - - - -
GREEN 11 18 Aug 2021 12:00 148 - - - - - - -
GREEN 12 18 Aug 2021 18:00 126 - - - - - - -
GREEN 13 19 Aug 2021 00:00 126 - - - - - - -
GREEN 14 19 Aug 2021 06:00 126 - - - - - - -
GREEN 15 19 Aug 2021 12:00 166 - - - - - - -
GREEN 16 19 Aug 2021 18:00 101 - - - - - - -
GREEN 17 20 Aug 2021 00:00 101 - - - - - - -
GREEN 18 20 Aug 2021 06:00 130 - - - - - - -
GREEN 19 20 Aug 2021 12:00 112 - - - - - - -
GREEN 20 20 Aug 2021 18:00 115 - - - - - - -
GREEN 21 21 Aug 2021 00:00 166 -
- - - - - United States
Download:





Impact estimation for the next 72h
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Rainfall

488 mm

Up to 4.3 million can be affected by rain higher than 100mm (see SSHS)





Rain exposed population - AoIs

Estimations based on the bulletin of 21 Aug 2021 00:00 UTC
LevelCountryPopulation 
250-500 mmUnited States5,050 
100-250 mmUnited States4,269,647 
50-100 mmUnited States17,831,022 

Rain Impact Timeline

people affected <=10000
10000< people affected <=100000
people affected >100000


Alert N° Date (UTC) Max Rainfall (mm) Pop >100mm or higher 50-100 100-250 250-500 500-750 750-1000 >1000 Countries
Blue 1 16 Aug 2021 00:00 191 - - - - - - -
Blue 2 16 Aug 2021 06:00 225 - - - - - - -
Blue 3 16 Aug 2021 12:00 220 - - - - - - -
Blue 4 16 Aug 2021 18:00 196 - - - - - - -
Blue 5 17 Aug 2021 00:00 165 - - - - - - -
Blue 6 17 Aug 2021 06:00 330 - - - - - - -
Blue 7 17 Aug 2021 12:00 216 - - - - - - -
Blue 8 17 Aug 2021 18:00 136 - - - - - - -
Blue 9 18 Aug 2021 00:00 200 - - - - - - -
Blue 10 18 Aug 2021 06:00 151 - - - - - - -
Blue 11 18 Aug 2021 12:00 169 - - - - - - -
Blue 12 18 Aug 2021 18:00 306 - - - - - - -
Blue 13 19 Aug 2021 00:00 253 - - - - - - -
Blue 14 19 Aug 2021 06:00 241 - - - - - - -
Blue 15 19 Aug 2021 12:00 294 - - - - - - -
Blue 16 19 Aug 2021 18:00 244 - - - - - - -
Blue 17 20 Aug 2021 00:00 197 - - - - - - -
Blue 18 20 Aug 2021 06:00 255 - - - - - - -
Blue 19 20 Aug 2021 12:00 274 - - - - - - -
Blue 20 20 Aug 2021 18:00 178 - - - - - - -
Blue 21 21 Aug 2021 00:00 375 4.3 million
- - - United States




Impact estimation for the next 72h
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StormSurge

0.2 m

The maximum Storm surge height is  0.2m in Half Island Cove, Canada. This height is estimated for 21 Aug 2021 03:45 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.

Storm Surge Exposed population - AoIs


Storm Surge Exposed locations

Calculation based on the bulletin of 21 Aug 2021 00:00 UTC
    
Alert Date (UTC) Name Country Storm surge height (m)
21 Aug 2021 03:45 Half Island Cove Canada  0.2
21 Aug 2021 03:45 Whitehead Canada  0.2
21 Aug 2021 05:15 Parkers Cove Canada  0.2
21 Aug 2021 03:30 Polpis United States  0.2
21 Aug 2021 03:30 Wauwinet United States  0.2
21 Aug 2021 03:30 Hoicks Hollow United States  0.2
21 Aug 2021 03:30 Siasconset United States  0.2
21 Aug 2021 02:30 Ocracoke United States  0.2
21 Aug 2021 02:30 Widgen Woods United States  0.2
21 Aug 2021 01:45 Halifax Canada  0.2
21 Aug 2021 01:45 Dartmouth Canada  0.2
21 Aug 2021 01:45 Eastern Passage Canada  0.2
21 Aug 2021 03:45 Arichat Canada  0.1
21 Aug 2021 03:45 Canso Canada  0.1
21 Aug 2021 01:45 Larry's River Canada  0.1
21 Aug 2021 05:15 Robbinston United States  0.1
21 Aug 2021 05:15 Perry United States  0.1
21 Aug 2021 05:15 Saint Andrews Canada  0.1
21 Aug 2021 05:15 Pleasant Point United States  0.1
21 Aug 2021 05:15 Quoddy United States  0.1
21 Aug 2021 05:15 Eastport United States  0.1
21 Aug 2021 05:15 Richardson Canada  0.1
21 Aug 2021 05:15 Welshpool Canada  0.1
21 Aug 2021 05:15 L'Etete Canada  0.1
21 Aug 2021 02:00 Mahone Bay Canada  0.1
21 Aug 2021 02:00 Lunenburg Canada  0.1
21 Aug 2021 05:15 Fourchu Canada  0.1
21 Aug 2021 05:15 Gabarus Canada  0.1
21 Aug 2021 05:45 Salmon River Canada  0.1
21 Aug 2021 05:45 Meteghan Canada  0.1
21 Aug 2021 05:45 Port Maitland Canada  0.1
21 Aug 2021 05:45 Dayton Canada  0.1
21 Aug 2021 05:30 Saint George Canada  0.1
21 Aug 2021 05:45 Ridge United States  0.1
21 Aug 2021 05:45 Lubec United States  0.1
21 Aug 2021 05:45 North Head Canada  0.1
21 Aug 2021 06:00 Margaretsville Canada  0.1
21 Aug 2021 06:00 Morden Canada  0.1
21 Aug 2021 04:30 Alma Canada  0.1
21 Aug 2021 04:30 Cape Enrage Canada  0.1
21 Aug 2021 04:30 Apple River Canada  0.1
21 Aug 2021 06:00 Advocate Harbour Canada  0.1
21 Aug 2021 06:00 Spencer Island Canada  0.1
21 Aug 2021 03:30 Port Hawkesbury Canada  0.1
21 Aug 2021 03:30 Point Tupper Canada  0.1
21 Aug 2021 03:30 Evanston Canada  0.1
21 Aug 2021 02:00 Lawrencetown Canada  0.1
21 Aug 2021 02:00 Seaforth Canada  0.1
21 Aug 2021 02:00 East Chezzetcook Canada  0.1
21 Aug 2021 02:00 Musquodoboit Harbour Canada  0.1
21 Aug 2021 04:45 East Dennis United States  0.1
21 Aug 2021 04:45 South Dennis United States  0.1
21 Aug 2021 04:45 North Harwich United States  0.1
21 Aug 2021 04:45 Dennis Port United States  0.1
21 Aug 2021 04:45 Northwest Harwich United States  0.1
21 Aug 2021 04:45 Brewster United States  0.1
21 Aug 2021 04:45 Harwich United States  0.1
21 Aug 2021 04:45 Harwich Center United States  0.1
21 Aug 2021 04:45 Harwich Port United States  0.1
21 Aug 2021 04:45 South Brewster United States  0.1
21 Aug 2021 04:45 East Brewster United States  0.1
21 Aug 2021 04:45 South Harwich United States  0.1
21 Aug 2021 04:45 East Harwich United States  0.1
21 Aug 2021 04:45 Namskaket United States  0.1
21 Aug 2021 04:45 Orleans United States  0.1
21 Aug 2021 04:45 West Chatham United States  0.1
21 Aug 2021 04:45 Old Harbor United States  0.1
21 Aug 2021 04:45 Shooters Island United States  0.1
21 Aug 2021 04:45 Chatham Port United States  0.1
21 Aug 2021 04:45 East Orleans United States  0.1
21 Aug 2021 04:45 Quitnesset United States  0.1
21 Aug 2021 04:45 Chatham United States  0.1
21 Aug 2021 04:45 North Chatham United States  0.1
21 Aug 2021 03:30 D'Escousse Canada  0.1
21 Aug 2021 03:30 Petit-de-Grat Canada  0.1
21 Aug 2021 05:45 Seal Cove Canada  0.1
21 Aug 2021 06:00 Hall Harbour Canada  0.1
21 Aug 2021 06:00 Port Greville Canada  0.1
21 Aug 2021 06:00 Scots Bay Canada  0.1
21 Aug 2021 06:00 Parrsboro Canada  0.1
21 Aug 2021 06:00 Marshall Cove Canada  0.1
21 Aug 2021 06:00 Tiverton Canada  0.1
21 Aug 2021 06:00 Church Point Canada  0.1
21 Aug 2021 06:00 Weymouth Canada  0.1
21 Aug 2021 05:00 Swans Island United States  0.1
21 Aug 2021 05:00 Minturn United States  0.1
21 Aug 2021 05:00 Atlantic United States  0.1
21 Aug 2021 05:00 Seal Cove United States  0.1
21 Aug 2021 05:00 Frenchboro United States  0.1
21 Aug 2021 05:00 Tremont United States  0.1
21 Aug 2021 05:00 Bass Harbor United States  0.1
21 Aug 2021 05:00 Southwest Harbor United States  0.1
21 Aug 2021 05:00 Asticou United States  0.1
21 Aug 2021 05:00 Cranberry Isles United States  0.1
21 Aug 2021 05:00 Seal Harbor United States  0.1
21 Aug 2021 05:00 Islesford United States  0.1
21 Aug 2021 05:15 Pretty Marsh United States  0.1
21 Aug 2021 05:15 Indian Point United States  0.1
21 Aug 2021 05:15 Somesville United States  0.1
21 Aug 2021 05:15 Hall Quarry United States  0.1
21 Aug 2021 05:15 Bar Harbor United States  0.1
21 Aug 2021 03:15 Saint Peters Canada  0.1
21 Aug 2021 03:15 L'Ardoise Canada  0.1
21 Aug 2021 03:15 Soldiers Cove Canada  0.1
21 Aug 2021 03:15 Grand River Canada  0.1
21 Aug 2021 04:15 Dog Island Corner United States  0.1
21 Aug 2021 04:15 Greenlaws Corner United States  0.1
21 Aug 2021 04:15 Lincolnville United States  0.1
21 Aug 2021 04:15 Herricks Corner United States  0.1
21 Aug 2021 04:15 Belfast United States  0.1
21 Aug 2021 04:15 Shermans Corner United States  0.1
21 Aug 2021 04:15 Bayside United States  0.1
21 Aug 2021 04:15 Searsport United States  0.1
21 Aug 2021 04:15 Dark Harbor United States  0.1
21 Aug 2021 04:15 Isleboro United States  0.1
21 Aug 2021 04:15 North Islesboro United States  0.1
21 Aug 2021 04:15 Pulpit Harbor United States  0.1
21 Aug 2021 04:15 Castine United States  0.1
21 Aug 2021 04:15 Goose Rocks United States  0.1
21 Aug 2021 04:15 Goose Falls United States  0.1
21 Aug 2021 04:15 Fort George United States  0.1
21 Aug 2021 04:15 Cape Rosier United States  0.1
21 Aug 2021 04:15 Flat Landing United States  0.1
21 Aug 2021 04:15 Stover Corner United States  0.1
21 Aug 2021 04:15 Eggemoggin United States  0.1
21 Aug 2021 04:15 Herricks United States  0.1
21 Aug 2021 04:15 Sunset United States  0.1
21 Aug 2021 05:15 La Have Canada  0.1
21 Aug 2021 05:30 Centreville Canada  0.1
21 Aug 2021 05:30 Waterford Canada  0.1
21 Aug 2021 05:45 Westport Canada  0.1
21 Aug 2021 05:45 Freeport Canada  0.1
21 Aug 2021 05:15 Lancaster Canada  0.1
21 Aug 2021 05:15 Saint John Canada  0.1
21 Aug 2021 05:45 Pocologan Canada  0.1
21 Aug 2021 05:45 Canning Canada  0.1
21 Aug 2021 05:45 Port Williams Canada  0.1
21 Aug 2021 05:45 Kingsport Canada  0.1
21 Aug 2021 04:00 Kendalls Corner United States  0.1
21 Aug 2021 04:00 Camden United States  0.1
21 Aug 2021 04:00 Hayford Corner United States  0.1
21 Aug 2021 04:00 Holmes Mill United States  0.1
21 Aug 2021 04:00 Stevens Corner United States  0.1
21 Aug 2021 04:00 Simpsons Corner United States  0.1
21 Aug 2021 04:00 City Point United States  0.1
21 Aug 2021 04:00 Stockton Springs United States  0.1
21 Aug 2021 04:00 Sandy Point United States  0.1
21 Aug 2021 04:00 West Penobscot United States  0.1
21 Aug 2021 00:30 Tangier Canada  0.1
21 Aug 2021 00:30 Sheet Harbour Canada  0.1
21 Aug 2021 00:00 Hatteras United States  0.1
21 Aug 2021 00:00 Frisco United States  0.1
21 Aug 2021 02:00 Sambro Canada  0.1
21 Aug 2021 03:15 Surfside United States  0.1
21 Aug 2021 03:15 Monomoy United States  0.1
21 Aug 2021 03:15 Quaise United States  0.1
21 Aug 2021 05:30 Lepreau Canada  0.1
21 Aug 2021 05:30 Dipper Harbour West Canada  0.1
21 Aug 2021 04:15 Clarks Harbour Canada  0.1
21 Aug 2021 04:15 Barrington Passage Canada  0.1
21 Aug 2021 04:15 Barrington Canada  0.1
21 Aug 2021 04:15 Clyde River Canada  0.1
21 Aug 2021 04:15 Port Clyde Canada  0.1
21 Aug 2021 02:15 Hubbards Canada  0.1
21 Aug 2021 04:30 Glen Cove United States  0.1
21 Aug 2021 04:30 Rockport United States  0.1
21 Aug 2021 00:30 Port Dufferin Canada  0.1
21 Aug 2021 00:30 Moose River Canada  0.1
21 Aug 2021 00:30 Ecum Secum Canada  0.1
21 Aug 2021 04:30 Red Rock Corner United States  0.1
21 Aug 2021 04:30 Eden United States  0.1
21 Aug 2021 04:30 Lamoine Beach United States  0.1
21 Aug 2021 04:30 Salsbury Cove United States  0.1
21 Aug 2021 04:30 Hulls Cove United States  0.1
21 Aug 2021 04:30 Summer Harbor United States  0.1
21 Aug 2021 04:30 Winter Harbor United States  0.1
21 Aug 2021 04:30 Yarmouth Port United States  0.1
21 Aug 2021 04:30 Dennis United States  0.1
21 Aug 2021 04:30 South Yarmouth United States  0.1
21 Aug 2021 04:30 West Dennis United States  0.1
21 Aug 2021 06:00 Dipper Harbour Canada  0.1
21 Aug 2021 01:30 Indian Harbour Canada  0.1
21 Aug 2021 05:30 Saint Martins Canada  0.1
21 Aug 2021 04:45 Pubnico Canada  0.1
21 Aug 2021 04:45 Lower Woods Harbour Canada  0.1
21 Aug 2021 05:00 Wedgeport Canada  0.1
21 Aug 2021 05:30 South Trescott United States  0.1
21 Aug 2021 04:15 Bickerton West Canada  0.1
21 Aug 2021 04:15 Isaacs Harbour Canada  0.1
21 Aug 2021 04:15 Goldboro Canada  0.1
21 Aug 2021 05:00 Musquash Canada  0.1
21 Aug 2021 02:30 Petite Riviere Bridge Canada  0.1
21 Aug 2021 02:15 Liscomb Canada  0.1
21 Aug 2021 02:15 Sonora Canada  0.1
21 Aug 2021 04:45 Matinicus United States  0.1
21 Aug 2021 04:45 North Haven United States  0.1
21 Aug 2021 04:45 Vinalhaven United States  0.1
21 Aug 2021 04:45 Stonington United States  0.1
21 Aug 2021 04:45 Lookout United States  0.1
21 Aug 2021 04:45 Isle au Haut United States  0.1
21 Aug 2021 04:45 Oceanville United States  0.1
21 Aug 2021 05:45 Little Machias United States  0.1
21 Aug 2021 05:45 Cutler United States  0.1
21 Aug 2021 05:30 Chebogue Point Canada  0.1
21 Aug 2021 05:30 Yarmouth Canada  0.1
21 Aug 2021 05:30 Tusket Canada  0.1
21 Aug 2021 02:30 Sherbrooke Canada  0.1
21 Aug 2021 03:45 Madaket United States  0.1
21 Aug 2021 03:45 Fishers Landing United States  0.1
21 Aug 2021 03:45 Cisco United States  0.1
21 Aug 2021 03:45 Nantucket United States  0.1
21 Aug 2021 04:45 Deer Isle United States  0.1
21 Aug 2021 04:45 Sargentville United States  0.1
21 Aug 2021 04:45 Mountainville United States  0.1
21 Aug 2021 04:45 Sedgwick United States  0.1
21 Aug 2021 04:45 Reach United States  0.1
21 Aug 2021 04:45 Sunshine United States  0.1
21 Aug 2021 04:45 Brooklin United States  0.1
21 Aug 2021 04:45 Naskeag United States  0.1
21 Aug 2021 05:15 Cuttyhunk United States  0.1
21 Aug 2021 05:15 Gay Head United States  0.1
21 Aug 2021 05:15 Nashaquitsa United States  0.1
21 Aug 2021 05:15 Menemsha United States  0.1
21 Aug 2021 05:15 Chilmark United States  0.1
21 Aug 2021 05:15 Christian Town United States  0.1
21 Aug 2021 05:15 West Tisbury United States  0.1
21 Aug 2021 05:15 North Tisbury United States  0.1
21 Aug 2021 05:15 Lamberts Cove United States  0.1
21 Aug 2021 05:15 Quansoo United States  0.1
21 Aug 2021 05:15 Tenants Harbor United States  0.1
21 Aug 2021 05:15 Elmore United States  0.1
21 Aug 2021 05:15 Saint George United States  0.1
21 Aug 2021 05:15 Clark Island United States  0.1
21 Aug 2021 05:15 Spruce Head United States  0.1
21 Aug 2021 05:15 Blackinton Corners United States  0.1
21 Aug 2021 05:15 Rockville United States  0.1
21 Aug 2021 05:15 Rockland United States  0.1
21 Aug 2021 05:15 Simonton Corners United States  0.1
21 Aug 2021 05:15 Ash Point United States  0.1
21 Aug 2021 05:15 Owls Head United States  0.1
21 Aug 2021 05:15 Sag Harbor United States  0.1
21 Aug 2021 05:15 Sagaponack United States  0.1
21 Aug 2021 05:15 Northwest Landing United States  0.1
21 Aug 2021 05:15 Wainscott United States  0.1
21 Aug 2021 05:15 Alewife Brook Landing United States  0.1
21 Aug 2021 05:15 Hardscrabble United States  0.1
21 Aug 2021 05:15 Northwest Harbor United States  0.1
21 Aug 2021 05:15 Apaquogue United States  0.1
21 Aug 2021 05:15 Lafarges Landing United States  0.1
21 Aug 2021 05:15 East Hampton United States  0.1
21 Aug 2021 05:15 Threemile Harbor United States  0.1
21 Aug 2021 05:15 East Hampton North United States  0.1
21 Aug 2021 05:15 Maidstone Park United States  0.1
21 Aug 2021 05:15 Kingstown United States  0.1
21 Aug 2021 05:15 Springs United States  0.1
21 Aug 2021 05:15 Fireplace United States  0.1
21 Aug 2021 05:15 Amagansett United States  0.1
21 Aug 2021 05:15 Barnes Hole United States  0.1
21 Aug 2021 05:15 Abrams Landing United States  0.1
21 Aug 2021 05:15 Napeague United States  0.1
21 Aug 2021 05:15 Quincetree Landing United States  0.1
21 Aug 2021 04:15 Black Corner United States  0.1
21 Aug 2021 02:45 Roseway Canada  0.1
21 Aug 2021 02:30 Port Mouton Canada  0.1
21 Aug 2021 02:30 Western Head Canada  0.1