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

Impact

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

Meteorological source GDACS
Exposed countries United States
Exposed population No people in Category 1 or higher
Maximum wind speed 74 km/h
Maximum storm surge 0.6 m (28 Jun 23:00 UTC)
Vulnerability Low (United States)
Landfall between
28 Jun 2021 21:00 - 29 Jun 2021 03:00

in 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
Current 37 km/h n.a. n.a. 0.5
Overall 74 km/h 0.6 m n.a. 0.5

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

Wind

37 km/h Current Max.

Up to 530000 people in Tropical Storm strength or higher (see SSHS)

Impact Timeline

Alert Date (UTC) Max Winds (km/h) Population in
Tropical Storm or higher
Population in
Cat 1. or higher
Countries
Green 1 28 Jun 2021 15:00 65 1.5 million No people United States
Green 2 28 Jun 2021 21:00 74 620 thousand No people United States
Green 3 29 Jun 2021 03:00 56 530 thousand No people United States
Green 4 29 Jun 2021 09:00 37 530 thousand No people United States

Bulletin Timeline

Alert Date (UTC) Category
(SSHS)
Max winds
(km/h)
Population in
Cat.1 or higher
Population in
Tropical Storm
or higher
Location (lat, lon) Countries
GREEN
1 28 Jun 2021 15:00 Tropical depression 56 no people 830000 people 31.9, -78.3
GREEN
2 28 Jun 2021 21:00 Tropical storm 74 no people 630000 people 32.3, -80.1
GREEN
3 29 Jun 2021 03:00 Tropical depression 56 no people no people 32.6, -81.5 United States
GREEN
4 29 Jun 2021 09:00 Tropical depression 37 no people no people 33, -83 United States
Actual track of the current bulletin
The alert for forecast greater than 3 days is limited to Orange level.
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Exposed population - AoIs

Exposed population in the potential affected countries, provinces and populated places

Countries

Country
United States

Provinces

Region Province Country
Georgia United States
South Carolina United States

Critical infrastructure

Airports, ports, nuclear plants and hydrodams at risk, if affected, are listed below.

Airports

Name IATA Code Elevation (m) Usage Runway type IFR Runway Length (ft)
Womack 90 0
Millhaven 50 0
Screven Ems 76 0
Statesboro Municipal TBR 57 Civ. Paved Yes 5500
Landings East Sylvania 47 0
East Georgia Regional Medical Center 65 0
Plantation Air Park 57 Civ. Paved Yes 5000
Southern Ag Aviation 55 0
Brooklet Airpark 59 0
Davis 25 0
Briar Patch 30 0
Harpers 34 0
Effingham County Hospital 20 0
Swaids Field 26 0
Hampton Varnville 34 0
Savannah International SAV 16 Civ. Paved Yes 9300
Ridgeland 24 0
Hyatt Regency Hotel 37 0
Beaufort Mcas BFT 12 Mil. Paved Yes 12200
Melrose Landing unknown 0
Beaufort County Memorial Hospital 6 0
Salty Fare Landng unknown 0
Laurel Hill Plantation 3 0
Beaufort County 3 0
Hilton Head HHH 6 Civ. Paved Yes 4300
Marsh Point 4 0
Airy Hall 6 0
Fripp Island Emergency 2 0
Yonges Island 3 0
Pluff Mud Field 5 0
Charleston Executive 6 Civ. Paved Yes 5000

Ports

Name LOCODE Country
Port Wentworth USPWN Wake Island
Port Royal USPRL Wake Island
Beaufort Wake Island

Rainfall

Rainfall accumulation of the past 24h, as detected by the Global Precipitation Measurement mission of NASA. For more information, see https://www.nasa.gov/mission_pages/GPM/main/index.html.

...

StormSurge

0.6 m

The maximum Storm surge height is  0.6m in Seabrook Island, United States. This height is estimated for 28 Jun 2021 23:00 UTC .

The JRC has developed an experimental global storm surge model. 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.

Locations affected by Storm surge (112 locations). Calculation based on advisory number 2 of 28 Jun 2021 21:00:00 UTC. (Simulation using 0.5 minute resolution)

Alert Date (UTC) Name Country Storm surge height (m)
28 Jun 2021 23:00 Seabrook Island United States  0.6
28 Jun 2021 23:00 Kiawah Island United States  0.6
28 Jun 2021 23:00 Legareville United States  0.6
28 Jun 2021 23:00 Bayfront United States  0.6
28 Jun 2021 23:00 Folly Beach United States  0.6
28 Jun 2021 23:00 Charleston United States  0.6
28 Jun 2021 23:00 Lakeview Of Lawton Bluff United States  0.6
28 Jun 2021 23:00 Centerville United States  0.6
28 Jun 2021 23:00 Secessionville United States  0.6
28 Jun 2021 23:00 Fort Johnson Estates United States  0.6
28 Jun 2021 23:00 Edisto Beach United States  0.6
28 Jun 2021 23:00 Edisto Island United States  0.6
28 Jun 2021 23:00 Freedman United States  0.6
28 Jun 2021 23:00 Rockville United States  0.6
29 Jun 2021 00:00 Cedar Reef Villas United States  0.6
29 Jun 2021 00:00 Frogmore United States  0.6
28 Jun 2021 22:00 Hobcaw Point United States  0.6
28 Jun 2021 22:00 The Groves United States  0.6
28 Jun 2021 22:00 Mount Pleasant United States  0.6
28 Jun 2021 22:00 Fort Moultrie United States  0.6
28 Jun 2021 22:00 Cassina Heights United States  0.6
28 Jun 2021 22:00 Sullivan's Island United States  0.6
28 Jun 2021 22:00 Palmetto Fort United States  0.6
28 Jun 2021 22:00 Island of Palms United States  0.6
28 Jun 2021 22:00 Porcher Bluff United States  0.6
28 Jun 2021 22:00 Ten Mile United States  0.6
28 Jun 2021 22:00 Isle of Palms United States  0.6
28 Jun 2021 22:00 Buck Hall United States  0.5
28 Jun 2021 22:00 Tibwin United States  0.5
28 Jun 2021 22:00 McCellanville United States  0.5
28 Jun 2021 22:00 McClellanville United States  0.5
28 Jun 2021 22:00 Quarantine United States  0.4
29 Jun 2021 01:00 Fort Fremont United States  0.4
28 Jun 2021 21:00 Clambank United States  0.4
28 Jun 2021 21:00 De Bordieu Colony United States  0.4
29 Jun 2021 01:00 Hilton Head Plantation United States  0.3
28 Jun 2021 21:00 Hagley Estates United States  0.3
28 Jun 2021 21:00 True Blue United States  0.3
28 Jun 2021 21:00 Birds Nest United States  0.3
28 Jun 2021 21:00 Chapel Creek United States  0.3
29 Jun 2021 01:00 Gator Field United States  0.3
28 Jun 2021 21:00 Mount Gilead United States  0.3
28 Jun 2021 21:00 Garden City United States  0.3
29 Jun 2021 01:00 Calibogue Cay United States  0.3
29 Jun 2021 01:00 Spanish Wells United States  0.3
29 Jun 2021 01:00 Bay Pines United States  0.3
29 Jun 2021 01:00 Sea Pines Plantation United States  0.3
29 Jun 2021 01:00 Forest Beach United States  0.3
29 Jun 2021 01:00 Hilton Head Island United States  0.3
29 Jun 2021 01:00 Long Cove Plantation United States  0.3
29 Jun 2021 01:00 Bram Landing United States  0.3
29 Jun 2021 01:00 Palmetto Dunes United States  0.3
28 Jun 2021 22:00 Deer Track Villas United States  0.3
28 Jun 2021 22:00 Crystal Lake United States  0.3
28 Jun 2021 22:00 Pebble Beach United States  0.3
28 Jun 2021 22:00 Myrtle Ridge United States  0.3
29 Jun 2021 01:00 Folly Field United States  0.3
28 Jun 2021 22:00 Pawleys Island United States  0.3
28 Jun 2021 22:00 Parkersville United States  0.3
28 Jun 2021 22:00 Annieville United States  0.3
28 Jun 2021 22:00 North Litchfield Beach United States  0.3
28 Jun 2021 22:00 Konig United States  0.3
28 Jun 2021 22:00 Plantation Point United States  0.3
28 Jun 2021 22:00 Myrtle Beach United States  0.3
28 Jun 2021 22:00 Ocean Forest United States  0.3
28 Jun 2021 22:00 Arcadian Shores United States  0.3
28 Jun 2021 22:00 Nixons Crossroads United States  0.3
28 Jun 2021 22:00 Creekside United States  0.3
28 Jun 2021 22:00 Little River United States  0.3
28 Jun 2021 22:00 Calabash United States  0.3
28 Jun 2021 22:00 Shady Forest United States  0.3
28 Jun 2021 22:00 Sea Trail Plantation United States  0.3
28 Jun 2021 22:00 Huntington Marsh United States  0.2
28 Jun 2021 22:00 Oak Hill United States  0.2
28 Jun 2021 22:00 Murrells Inlet United States  0.2
28 Jun 2021 22:00 Inlet Harbor United States  0.2
28 Jun 2021 22:00 Surfside Beach United States  0.2
28 Jun 2021 22:00 Monogram United States  0.2
28 Jun 2021 22:00 Briarcliffe Acres United States  0.2
28 Jun 2021 22:00 Atlantic Beach United States  0.2
28 Jun 2021 22:00 Ingram Beach United States  0.2
28 Jun 2021 22:00 North Myrtle Beach United States  0.2
28 Jun 2021 22:00 Cherry Grove Beach United States  0.2
28 Jun 2021 22:00 Varnamtown United States  0.2
29 Jun 2021 01:00 Daufuskie Landing United States  0.2
29 Jun 2021 01:00 Cooper River Landing United States  0.2
29 Jun 2021 01:00 Fort Screven United States  0.2
29 Jun 2021 01:00 Tybee Island United States  0.2
29 Jun 2021 01:00 South Beach Villas United States  0.2
29 Jun 2021 01:00 Greenwood Forest United States  0.2
28 Jun 2021 22:00 Sunset Beach United States  0.2
28 Jun 2021 22:00 Ocean Isle Beach United States  0.2
28 Jun 2021 22:00 Brick Landing United States  0.2
28 Jun 2021 22:00 Secession United States  0.2
28 Jun 2021 22:00 Coolvale United States  0.2
28 Jun 2021 22:00 Holden Beach United States  0.2
28 Jun 2021 22:00 Old Town United States  0.2
28 Jun 2021 22:00 Kendall Chapel United States  0.2
28 Jun 2021 22:00 Sheephead Rock United States  0.2
28 Jun 2021 22:00 Silver Lake United States  0.2
28 Jun 2021 22:00 Myrtle Grove United States  0.1
28 Jun 2021 22:00 Masonboro United States  0.1
28 Jun 2021 22:00 Long Beach United States  0.1
28 Jun 2021 22:00 Saint James United States  0.1
28 Jun 2021 22:00 Yaupon Beach United States  0.1
28 Jun 2021 22:00 Caswell Beach United States  0.1
28 Jun 2021 22:00 Fort Caswell United States  0.1
28 Jun 2021 22:00 Southport United States  0.1
28 Jun 2021 22:00 Bald Head Island United States  0.1
28 Jun 2021 22:00 Kure Beach United States  0.1
28 Jun 2021 22:00 Carolina Beach United States  0.1
28 Jun 2021 22:00 Myrtle Sound United States  0.1