Overall Green Tropical Cyclone for LALA-26 in United States from 12 Aug 2026 15:00 UTC to 28 Aug 2026 09:00 UTC

GDACS is a cooperation framework between the United Nations, the European Commission and disaster managers worldwide to improve awareness, information exchange and coordination in the first phase after major sudden-onset disasters.

Overall Green Tropical Cyclone for LALA-26

in United States

21 Aug 2026 12 UTC

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Meteorological source:

GDACS NOAA

Impact Single TC

GFS
HWRF
ECMWF

Impact based on all weather systems in the area

Impact

Tropical Cyclone LALA-26 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	216 km/h
Maximum storm surge	0.2 m (13 Aug 13:30 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	184 km/h	n.a.	331 mm	0.5
HWRF Overall	216 km/h	0.2 m	982 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 2026 12:00 UTC (Overall situation)

Category	Country	Population
Tropical Storm	United States	519,790	+
	United States	519,780
	Other countries	10

See TC classification SSHS

Wind Impact Timeline

people affected <=10000

10000< people affected <=100000

people affected >100000

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
1	12 Aug 2026 12:00	72	-	-	-	-	-	-	-
2	12 Aug 2026 18:00	90	-	-	-	-	-	-	-
3	13 Aug 2026 00:00	72	-	-	-	-	-	-	-
4	13 Aug 2026 06:00	79	-	-	-	-	-	-	-
5	13 Aug 2026 12:00	68	-	-	-	-	-	-	-
6	13 Aug 2026 18:00	86	-	-	-	-	-	-	-
7	14 Aug 2026 00:00	76	-	-	-	-	-	-	-
8	14 Aug 2026 06:00	90	-	-	-	-	-	-	-
9	14 Aug 2026 12:00	97	-	-	-	-	-	-	-
10	14 Aug 2026 18:00	94	-	-	-	-	-	-	-
11	15 Aug 2026 00:00	104	-	-	-	-	-	-	-
12	15 Aug 2026 06:00	115	-		-	-	-	-	-	United States, Other countries
13	15 Aug 2026 12:00	115	-		-	-	-	-	-	United States, Other countries
14	15 Aug 2026 18:00	137	-		-	-	-	-	-	United States, Other countries
15	16 Aug 2026 00:00	126	-		-	-	-	-	-	United States, Other countries
16	16 Aug 2026 06:00	115	-		-	-	-	-	-	United States, Other countries
17	16 Aug 2026 12:00	101	-		-	-	-	-	-	United States, Other countries
18	16 Aug 2026 18:00	101	-		-	-	-	-	-	United States, Other countries
19	17 Aug 2026 00:00	94	-		-	-	-	-	-	United States, Other countries
20	17 Aug 2026 06:00	90	-	-	-	-	-	-	-
21	17 Aug 2026 12:00	101	-	-	-	-	-	-	-
22	17 Aug 2026 18:00	104	-	-	-	-	-	-	-
23	18 Aug 2026 00:00	112	-	-	-	-	-	-	-
24	18 Aug 2026 06:00	130	-	-	-	-	-	-	-
25	18 Aug 2026 12:00	130	-	-	-	-	-	-	-
26	18 Aug 2026 18:00	184	-	-	-	-	-	-	-
27	19 Aug 2026 00:00	212	-	-	-	-	-	-	-
28	19 Aug 2026 06:00	216	-	-	-	-	-	-	-
29	19 Aug 2026 12:00	202	-	-	-	-	-	-	-
30	19 Aug 2026 18:00	209	-	-	-	-	-	-	-
31	20 Aug 2026 00:00	191	-	-	-	-	-	-	-
32	20 Aug 2026 06:00	169	-	-	-	-	-	-	-
33	20 Aug 2026 12:00	155	-	-	-	-	-	-	-
34	20 Aug 2026 18:00	155	-	-	-	-	-	-	-
35	21 Aug 2026 00:00	158	-	-	-	-	-	-	-
36	21 Aug 2026 06:00	191	-	-	-	-	-	-	-
37	21 Aug 2026 12:00	184	-	-	-	-	-	-	-

Download:

Impact estimation for the next 72h

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Rainfall

982 mm

Up to 800 thousand can be affected by rain higher than 100mm (see SSHS)

Rain exposed population - AoIs

Estimations based on the bulletin of 21 Aug 2026 12:00 UTC (Overall situation)

Level	Country	Population
750-1000 mm	United States	4,569
500-750 mm	United States	12,711
250-500 mm	United States	104,251
100-250 mm	United States	683,390
50-100 mm	United States	631,101	+
	United States	631,099
	Other countries	02

Rain Impact Timeline

people affected <=10000

10000< people affected <=100000

people affected >100000

N°	Date (UTC)	Max Rainfall (mm)	Pop >100mm or higher	50-100	100-250	250-500	500-750	750-1000	>1000	Countries
1	12 Aug 2026 12:00	183	-	-	-	-	-	-	-
2	12 Aug 2026 18:00	185	-	-	-	-	-	-	-
3	13 Aug 2026 00:00	120	-	-	-	-	-	-	-
4	13 Aug 2026 06:00	219	-	-	-	-	-	-	-
5	13 Aug 2026 12:00	184	-	-	-	-	-	-	-
6	13 Aug 2026 18:00	216	-	-	-	-	-	-	-
7	14 Aug 2026 00:00	128	-	-	-	-	-	-	-
8	14 Aug 2026 06:00	101	-	-	-	-	-	-	-
9	14 Aug 2026 12:00	141	-	-	-	-	-	-	-
10	14 Aug 2026 18:00	140	-	-	-	-	-	-	-
11	15 Aug 2026 00:00	196	-	-	-	-	-	-	-
12	15 Aug 2026 06:00	210	Few people			-	-	-	-	United States
13	15 Aug 2026 12:00	328	20 thousand			-	-	-	-	United States
14	15 Aug 2026 18:00	298	10 thousand			-	-	-	-	United States
15	16 Aug 2026 00:00	451	40 thousand				-	-	-	United States
16	16 Aug 2026 06:00	391	50 thousand				-	-	-	United States
17	16 Aug 2026 12:00	255	50 thousand				-	-	-	United States, Other countries
18	16 Aug 2026 18:00	189	10 thousand			-	-	-	-	United States, Other countries
19	17 Aug 2026 00:00	64	-	-	-	-	-	-	-
20	17 Aug 2026 06:00	94	-	-	-	-	-	-	-
21	17 Aug 2026 12:00	0	-	-	-	-	-	-	-
22	17 Aug 2026 18:00	149	-	-	-	-	-	-	-
23	18 Aug 2026 00:00	166	-	-	-	-	-	-	-
24	18 Aug 2026 06:00	162	-	-	-	-	-	-	-
25	18 Aug 2026 12:00	187	-	-	-	-	-	-	-
26	18 Aug 2026 18:00	237	-	-	-	-	-	-	-
27	19 Aug 2026 00:00	351	-	-	-	-	-	-	-
28	19 Aug 2026 06:00	362	-	-	-	-	-	-	-
29	19 Aug 2026 12:00	294	-	-	-	-	-	-	-
30	19 Aug 2026 18:00	196	-	-	-	-	-	-	-
31	20 Aug 2026 00:00	182	-	-	-	-	-	-	-
32	20 Aug 2026 06:00	138	-	-	-	-	-	-	-
33	20 Aug 2026 12:00	145	-	-	-	-	-	-	-
34	20 Aug 2026 18:00	151	-	-	-	-	-	-	-
35	21 Aug 2026 00:00	297	-	-	-	-	-	-	-
36	21 Aug 2026 06:00	367	-	-	-	-	-	-	-
37	21 Aug 2026 12:00	331	-	-	-	-	-	-	-

Impact estimation for the next 72h

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StormSurge

0.2 m

The maximum Storm surge height is 0.2m in Weston Point, Kiribati. This height is estimated for 13 Aug 2026 13:30 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

No exposed population (greater than 0.25m) based on the bulletin of 21 Aug 2026 12:00 UTC (Overall situation)

Storm Surge Exposed locations

Calculation based on the bulletin of 21 Aug 2026 12:00 UTC (Overall situation)

Level	Date (UTC)	Name	Country	Storm surge height (m)
	13 Aug 2026 13:30	Weston Point	Kiribati	0.2
	13 Aug 2026 13:30	Napari	Kiribati	0.2
	15 Aug 2026 06:45	Umipaa	United States	0.1
	15 Aug 2026 06:45	Kaunakakai	United States	0.1
	15 Aug 2026 06:45	Kaumalapau	United States	0.1
	15 Aug 2026 06:45	Moku	United States	0.1
	15 Aug 2026 06:45	Kamalo	United States	0.1
	15 Aug 2026 06:45	Kaluaaha	United States	0.1
	15 Aug 2026 06:45	Keomuku	United States	0.1
	15 Aug 2026 06:45	Ualapue	United States	0.1
	15 Aug 2026 06:45	Pukoo	United States	0.1
	15 Aug 2026 06:45	Waialua	United States	0.1
	14 Aug 2026 11:15	Kaaawa	United States	0.1
	14 Aug 2026 11:15	Honolulu	United States	0.1
	14 Aug 2026 11:15	Kahana	United States	0.1
	14 Aug 2026 11:15	Kahaluu	United States	0.1
	14 Aug 2026 11:15	Ahuimanu	United States	0.1
	14 Aug 2026 11:15	Heeia	United States	0.1
	14 Aug 2026 11:15	Kaneohe	United States	0.1
	14 Aug 2026 11:15	Maunawili	United States	0.1
	14 Aug 2026 11:15	Aina Haina	United States	0.1
	14 Aug 2026 11:15	Kaneohe Station	United States	0.1
	14 Aug 2026 11:15	Kailua	United States	0.1
	14 Aug 2026 11:15	Lanikai	United States	0.1
	14 Aug 2026 11:15	Waimanalo	United States	0.1
	14 Aug 2026 11:15	Maunalua	United States	0.1
	15 Aug 2026 06:30	Kaanapali	United States	0.1
	15 Aug 2026 06:30	Puukolii	United States	0.1
	15 Aug 2026 06:30	Lahaina	United States	0.1

Disclaimer - Copyright
While we try everything to ensure accuracy, this information is purely indicative and should not be used for any decision making without alternate sources of information.
The JRC is not responsible for any damage or loss resulting from the use of the information presented on this website.
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