Overall Green alert Tropical Cyclone for HENRI-21
in United States
24 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 ECMWF
Exposed countries United States, Canada
Exposed population 590 thousand in Category 1 or higher
Maximum wind speed 58 km/h
Maximum storm surge 0.6 m (22 Aug 14:45 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
ECMWF Current 58 km/h 0.6 m 351 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)

TOP

Wind

58 km/h

Up to 220 thousand can be affected by wind speeds of Tropical Storm strength or above



Wind exposed population - AoIs

Estimations based on the bulletin of 24 Aug 2021 00:00 UTC
CategoryCountryPopulation 
CAT. 5United States, Canada278,210
+
United States277,718 
Canada491 
CAT. 4Canada, United States66,366
+
United States66,349 
Canada16 
CAT. 3Canada, United States49,750
+
United States49,713 
Canada36 
CAT. 2Canada, United States35,681
+
United States35,597 
Canada83 
CAT. 1United States, Canada157,828
+
United States157,686 
Canada142 
Tropical StormUnited States, Canada220,770
+
United States218,392 
Canada2,378 

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 - 280 thousand
United States, Canada, Bermuda
GREEN 12 21 Aug 2021 00:00 104 - - - - - - -
GREEN 13 21 Aug 2021 12:00 94 - - - - - - -
GREEN 14 22 Aug 2021 00:00 101 -
- - - - - United States
GREEN 15 22 Aug 2021 12:00 76 -
- - - - - United States
GREEN 16 23 Aug 2021 00:00 76 - - - - - - -
GREEN 17 23 Aug 2021 12:00 83 - - - - - - -
GREEN 18 24 Aug 2021 00:00 58 - - - - - - -
Download:





Impact estimation for the next 72h
TOP

Rainfall





Rain exposed population - AoIs

Estimations based on the bulletin of 24 Aug 2021 00:00 UTC
LevelCountryPopulation 
250-500 mmUnited States478 
100-250 mmUnited States24,455,551 
50-100 mmCanada, United States18,676,740
+
Canada520,871 
United States18,155,868 

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 12:00 249 -
- - - - - United States
Blue 12 21 Aug 2021 00:00 241 - - - - - - -
Blue 13 21 Aug 2021 12:00 72 - - - - - - -
Blue 14 22 Aug 2021 00:00 140 - - - - - - -
Blue 15 22 Aug 2021 12:00 103 -
- - - - - United States
Blue 16 23 Aug 2021 00:00 86 -
- - - - - United States
Blue 17 23 Aug 2021 12:00 79 -
- - - - - United States
Blue 18 24 Aug 2021 00:00 62 - - - - - - -




Impact estimation for the next 72h
TOP

StormSurge

The calculations have been performed using NAMIDANCE computer code, from Middle East Technical University.
reference: Zaytsev, Andrey; Kurkin, Andrey; Pelinovsky, Efim; Yalciner, Ahmet C. - NUMERICAL TSUNAMI MODEL NAMI-DANCE. - Science of Tsunami Hazards . Nov2019, Vol. 38 Issue 4, p151-168. 18p.
Doaj

0.6 m

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

Estimations based on the bulletin of 24 Aug 2021 00:00 UTC
LevelCountryPopulation 
0.5 - 1.0 mCanada, United States83,978
+
Canada24 
United States83,954 
0.25 - 0.5 mCanada, United States589,938
+
Canada145 
United States589,792 

Storm Surge Exposed locations

Calculation based on the bulletin of 24 Aug 2021 00:00 UTC