Overall Green alert Tropical Cyclone for HENRI-21
in United States
20 Aug 2021 12 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 ECMWF
Exposed countries United States, Canada
Exposed population 150 thousand in Category 1 or higher
Maximum wind speed 0 km/h
Maximum storm surge 0.2 m (20 Aug 20:00 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
ECMWF Current 0 km/h 0.2 m 249 mm 0.5
ECMWF Overall 58 km/h 0.6 m 351 mm 0.5

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

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Wind

58 km/h

Up to 140 thousand can be affected by wind speeds of Tropical Storm strength or above



Wind exposed population - AoIs

Estimations based on the bulletin of 20 Aug 2021 12:00 UTC
CategoryCountryPopulation 
CAT. 5United States, Canada126,815
+
United States100,368 
Canada26,447 
CAT. 4United States, Canada6,129
+
United States6,123 
Canada05 
CAT. 3United States, Canada3,036
+
United States2,951 
Canada84 
CAT. 2United States, Canada1,987
+
United States1,778 
Canada208 
CAT. 1United States, Canada7,578
+
United States7,199 
Canada378 
Tropical StormUnited States, Canada142,176
+
United States140,609 
Canada1,567 

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 15 Aug 2021 12:00 40 - - - - - - -
GREEN 2 16 Aug 2021 00:00 40 - - - - - - -
GREEN 3 16 Aug 2021 12:00 - 90 thousand
United States
GREEN 4 17 Aug 2021 00:00 - 130 thousand
United States, Canada
GREEN 5 17 Aug 2021 12:00 68 - - - - - - -
GREEN 6 18 Aug 2021 00:00 - 80 thousand
Canada, United States
GREEN 7 18 Aug 2021 12:00 65 - - - - - - -
GREEN 8 19 Aug 2021 00:00 86 - - - - - - -
GREEN 9 19 Aug 2021 12:00 130 - - - - - - -
GREEN 10 20 Aug 2021 00:00 94 - - - - - - -
GREEN 11 20 Aug 2021 12:00 - 150 thousand
United States, Canada
Download:





Impact estimation for the next 72h
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Rainfall





Rain exposed population - AoIs

Estimations based on the bulletin of 20 Aug 2021 12:00 UTC
LevelCountryPopulation 
100-250 mmUnited States4,000,779 
50-100 mmUnited States15,600,852 

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 15 Aug 2021 12:00 43 - - - - - - -
Blue 2 16 Aug 2021 00:00 72 - - - - - - -
Blue 3 16 Aug 2021 12:00 48 - - - - - - -
Blue 4 17 Aug 2021 00:00 94 -
- - - - - United States
Blue 5 17 Aug 2021 12:00 178 - - - - - - -
Blue 6 18 Aug 2021 00:00 63 - - - - - - -
Blue 7 18 Aug 2021 12:00 141 - - - - - - -
Blue 8 19 Aug 2021 00:00 210 -
- - - - - United States
Blue 9 19 Aug 2021 12:00 209 -
- - - - - United States
Blue 10 20 Aug 2021 00:00 268 -
- - - - - Canada, United States
Blue 11 20 Aug 2021 12:00 286 4 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 Kendalls Corner, United States. This height is estimated for 20 Aug 2021 20:00 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 20 Aug 2021 12:00 UTC
    
Alert Date (UTC) Name Country Storm surge height (m)
20 Aug 2021 20:00 Kendalls Corner United States  0.2
20 Aug 2021 20:00 Camden United States  0.2
20 Aug 2021 20:00 Hayford Corner United States  0.2
20 Aug 2021 20:00 Holmes Mill United States  0.2
20 Aug 2021 20:00 Stevens Corner United States  0.2
20 Aug 2021 20:00 Simpsons Corner United States  0.2
20 Aug 2021 20:00 City Point United States  0.2
20 Aug 2021 20:00 Dog Island Corner United States  0.2
20 Aug 2021 20:00 Greenlaws Corner United States  0.2
20 Aug 2021 20:00 Lincolnville United States  0.2
20 Aug 2021 20:00 Herricks Corner United States  0.2
20 Aug 2021 20:00 Belfast United States  0.2
20 Aug 2021 20:00 Shermans Corner United States  0.2
20 Aug 2021 20:00 Bayside United States  0.2
20 Aug 2021 20:00 Searsport United States  0.2
20 Aug 2021 20:00 Dark Harbor United States  0.2
20 Aug 2021 20:00 Isleboro United States  0.2
20 Aug 2021 20:00 North Islesboro United States  0.2
20 Aug 2021 20:00 Castine United States  0.2
20 Aug 2021 20:00 Stockton Springs United States  0.2
20 Aug 2021 20:00 Sandy Point United States  0.2
20 Aug 2021 20:00 Goose Falls United States  0.2
20 Aug 2021 20:00 Fort George United States  0.2
20 Aug 2021 20:00 Cape Rosier United States  0.2
20 Aug 2021 20:00 West Penobscot United States  0.2
20 Aug 2021 20:00 Flat Landing United States  0.2
20 Aug 2021 20:15 Pulpit Harbor United States  0.2
20 Aug 2021 20:15 Goose Rocks United States  0.2
20 Aug 2021 20:15 Stover Corner United States  0.2
20 Aug 2021 20:15 Eggemoggin United States  0.2
20 Aug 2021 20:15 Herricks United States  0.2
20 Aug 2021 20:15 Sunset United States  0.2
20 Aug 2021 20:15 Deer Isle United States  0.2
20 Aug 2021 20:15 Black Corner United States  0.2
20 Aug 2021 20:15 Sargentville United States  0.2
20 Aug 2021 20:15 Stonington United States  0.2
20 Aug 2021 12:30 Glen Cove United States  0.2
20 Aug 2021 12:30 Rockport United States  0.2
20 Aug 2021 16:45 Arichat Canada  0.2
20 Aug 2021 16:45 D'Escousse Canada  0.2
20 Aug 2021 16:45 Petit-de-Grat Canada  0.2
20 Aug 2021 16:45 Saint Peters Canada  0.2
20 Aug 2021 16:45 L'Ardoise Canada  0.2
20 Aug 2021 16:45 Soldiers Cove Canada  0.2
20 Aug 2021 17:00 Gabarus Canada  0.2
20 Aug 2021 16:30 Half Island Cove Canada  0.2
20 Aug 2021 17:00 Whitehead Canada  0.2
20 Aug 2021 17:00 Fourchu Canada  0.2
20 Aug 2021 16:45 Larry's River Canada  0.2
20 Aug 2021 16:15 Canso Canada  0.2
20 Aug 2021 16:30 Evanston Canada  0.2
20 Aug 2021 20:30 Port Greville Canada  0.2
20 Aug 2021 20:30 Canning Canada  0.2
20 Aug 2021 20:30 Scots Bay Canada  0.2
20 Aug 2021 20:30 Kingsport Canada  0.2
20 Aug 2021 20:30 Parrsboro Canada  0.2
20 Aug 2021 16:30 Port Hawkesbury Canada  0.2
20 Aug 2021 16:30 Point Tupper Canada  0.2
20 Aug 2021 20:15 North Haven United States  0.2
20 Aug 2021 16:45 Grand River Canada  0.2
20 Aug 2021 12:15 Blackinton Corners United States  0.2
20 Aug 2021 12:15 Rockville United States  0.2
20 Aug 2021 12:15 Rockland United States  0.2
20 Aug 2021 12:15 Simonton Corners United States  0.2
20 Aug 2021 12:15 Melvin Heights United States  0.2
20 Aug 2021 12:15 Owls Head United States  0.2
20 Aug 2021 12:15 Tenants Harbor United States  0.2
20 Aug 2021 12:15 Elmore United States  0.2
20 Aug 2021 12:15 Saint George United States  0.2
20 Aug 2021 12:15 Clark Island United States  0.2
20 Aug 2021 12:15 Spruce Head United States  0.2
20 Aug 2021 12:15 Ash Point United States  0.2
20 Aug 2021 12:15 Vinalhaven United States  0.2
20 Aug 2021 20:30 Hall Harbour Canada  0.1
20 Aug 2021 20:30 Port Williams Canada  0.1
20 Aug 2021 19:00 Alma Canada  0.1
20 Aug 2021 19:00 Cape Enrage Canada  0.1
20 Aug 2021 19:00 Apple River Canada  0.1
20 Aug 2021 19:15 Advocate Harbour Canada  0.1
20 Aug 2021 19:15 Spencer Island Canada  0.1
20 Aug 2021 19:00 Seaforth Canada  0.1
20 Aug 2021 19:00 East Chezzetcook Canada  0.1
20 Aug 2021 19:00 Musquodoboit Harbour Canada  0.1
20 Aug 2021 15:45 Mahone Bay Canada  0.1
20 Aug 2021 15:45 La Have Canada  0.1
20 Aug 2021 15:45 Lunenburg Canada  0.1
20 Aug 2021 14:15 Widgen Woods United States  0.1
20 Aug 2021 14:15 Hatteras United States  0.1
20 Aug 2021 19:15 Halifax Canada  0.1
20 Aug 2021 19:15 Dartmouth Canada  0.1
20 Aug 2021 19:15 Eastern Passage Canada  0.1
20 Aug 2021 17:30 Bickerton West Canada  0.1
20 Aug 2021 17:30 Isaacs Harbour Canada  0.1
20 Aug 2021 17:30 Goldboro Canada  0.1
20 Aug 2021 19:30 Morden Canada  0.1
20 Aug 2021 12:00 Lookout United States  0.1
20 Aug 2021 12:00 Isle au Haut United States  0.1
20 Aug 2021 19:30 Margaretsville Canada  0.1
20 Aug 2021 12:00 Matinicus United States  0.1
20 Aug 2021 19:45 Saint Martins Canada  0.1
20 Aug 2021 19:00 Marshall Cove Canada  0.1
20 Aug 2021 19:15 Lawrencetown Canada  0.1
20 Aug 2021 19:00 Tangier Canada  0.1
20 Aug 2021 19:00 Sheet Harbour Canada  0.1
20 Aug 2021 17:45 Robbinston United States  0.1
20 Aug 2021 17:45 Perry United States  0.1
20 Aug 2021 17:45 Saint Andrews Canada  0.1
20 Aug 2021 17:45 Pleasant Point United States  0.1
20 Aug 2021 17:45 Quoddy United States  0.1
20 Aug 2021 17:45 Eastport United States  0.1
20 Aug 2021 17:45 Richardson Canada  0.1
20 Aug 2021 17:45 Welshpool Canada  0.1
20 Aug 2021 17:45 L'Etete Canada  0.1
20 Aug 2021 17:15 Sonora Canada  0.1
20 Aug 2021 12:15 Criehaven United States  0.1
21 Aug 2021 00:00 Hubbards Canada  0.1
20 Aug 2021 20:45 Marstons Mills United States  0.1
20 Aug 2021 20:45 Osterville United States  0.1
20 Aug 2021 20:45 West Barnstable United States  0.1
20 Aug 2021 20:45 Centerville United States  0.1
20 Aug 2021 20:45 Pond Village United States  0.1
20 Aug 2021 20:45 Barnstable United States  0.1
20 Aug 2021 20:45 Cobbs Village United States  0.1
20 Aug 2021 20:45 Hyannis United States  0.1
20 Aug 2021 20:45 Yarmouth Station United States  0.1
20 Aug 2021 20:45 West Yarmouth United States  0.1
20 Aug 2021 20:45 Yarmouth Port United States  0.1
20 Aug 2021 20:45 Dennis United States  0.1
20 Aug 2021 20:45 South Yarmouth United States  0.1
20 Aug 2021 20:45 West Dennis United States  0.1
20 Aug 2021 20:45 East Dennis United States  0.1
20 Aug 2021 20:45 South Dennis United States  0.1
20 Aug 2021 20:45 North Harwich United States  0.1
20 Aug 2021 20:45 Dennis Port United States  0.1
20 Aug 2021 20:45 Northwest Harwich United States  0.1
20 Aug 2021 18:30 Indian Harbour Canada  0.1
20 Aug 2021 19:00 Port Dufferin Canada  0.1
20 Aug 2021 19:00 Moose River Canada  0.1
20 Aug 2021 18:00 Liscomb Canada  0.1
20 Aug 2021 20:15 Brewster United States  0.1
20 Aug 2021 20:15 Harwich United States  0.1
20 Aug 2021 20:15 Harwich Center United States  0.1
20 Aug 2021 20:15 Harwich Port United States  0.1
20 Aug 2021 20:15 South Brewster United States  0.1
20 Aug 2021 20:15 East Brewster United States  0.1
20 Aug 2021 20:15 South Harwich United States  0.1
20 Aug 2021 17:45 Ecum Secum Canada  0.1
20 Aug 2021 12:45 Wedgeport Canada  0.1
20 Aug 2021 12:45 Tusket Canada  0.1
20 Aug 2021 12:45 Pubnico Canada  0.1
20 Aug 2021 17:00 Sherbrooke Canada  0.1
20 Aug 2021 19:30 Prospect Canada  0.1
20 Aug 2021 19:30 Terence Bay Canada  0.1
20 Aug 2021 19:30 Sambro Canada  0.1
20 Aug 2021 20:15 Sandwich United States  0.1
20 Aug 2021 20:15 Pine Tree Corner United States  0.1
20 Aug 2021 20:15 Mashpee United States  0.1
20 Aug 2021 20:15 Mashpee Neck United States  0.1
20 Aug 2021 20:15 Santuit United States  0.1
20 Aug 2021 20:15 Cotuit United States  0.1
20 Aug 2021 20:15 Newtown United States  0.1
20 Aug 2021 20:15 East Sandwich United States  0.1
20 Aug 2021 12:00 Pleasant Point United States  0.1
20 Aug 2021 12:00 Glenmere United States  0.1
20 Aug 2021 12:00 Port Clyde United States  0.1
20 Aug 2021 12:00 Cushing United States  0.1
20 Aug 2021 12:30 Oceanville United States  0.1
20 Aug 2021 12:30 Mountainville United States  0.1
20 Aug 2021 12:30 Sedgwick United States  0.1
20 Aug 2021 12:30 Reach United States  0.1
20 Aug 2021 12:30 Sunshine United States  0.1
20 Aug 2021 12:30 Brooklin United States  0.1
20 Aug 2021 20:45 South Truro United States  0.1
20 Aug 2021 20:45 Truro United States  0.1
20 Aug 2021 20:45 East Harwich United States  0.1
20 Aug 2021 20:45 Wellfleet United States  0.1
20 Aug 2021 20:45 Namskaket United States  0.1
20 Aug 2021 20:45 Rock Harbor United States  0.1
20 Aug 2021 20:45 Campground Landing United States  0.1
20 Aug 2021 20:45 North Eastham United States  0.1
20 Aug 2021 20:45 Silver Spring Beach United States  0.1
20 Aug 2021 20:45 Kingsbury Beach United States  0.1
20 Aug 2021 20:45 First Encounter Beach United States  0.1
20 Aug 2021 20:45 Newcomb Hollow United States  0.1
20 Aug 2021 20:45 Orleans United States  0.1
20 Aug 2021 20:45 West Chatham United States  0.1
20 Aug 2021 20:45 South Wellfleet United States  0.1
20 Aug 2021 20:45 Cahoon Hollow United States  0.1
20 Aug 2021 20:45 Fresh Brook United States  0.1
20 Aug 2021 20:45 Lecount Hollow United States  0.1
20 Aug 2021 20:45 Chatham Port United States  0.1
20 Aug 2021 20:45 Eastham United States  0.1
20 Aug 2021 20:45 East Orleans United States  0.1
20 Aug 2021 18:00 Saint George Canada  0.1
20 Aug 2021 20:15 Quitnesset United States  0.1
20 Aug 2021 20:15 Chatham United States  0.1
20 Aug 2021 20:15 Weeset United States  0.1
20 Aug 2021 20:15 North Chatham United States  0.1
20 Aug 2021 20:15 Tonset United States  0.1
20 Aug 2021 20:15 Nauset Heights United States  0.1
20 Aug 2021 20:15 Bournedale United States  0.1
20 Aug 2021 20:15 Cedarville United States  0.1
20 Aug 2021 20:15 Cedar Bushes United States  0.1
20 Aug 2021 20:15 Ellisville United States  0.1
20 Aug 2021 20:15 Vallersville United States  0.1
20 Aug 2021 20:15 Sagamore United States  0.1
20 Aug 2021 14:15 Ocracoke United States  0.1
20 Aug 2021 18:45 Ingramport Canada  0.1
20 Aug 2021 18:45 French Village Canada  0.1