Mahaweli flood watch

Station	Level	Alert		Next level, 24h
	1.90 m	1.4	Minor floodMinor	4.6% Major · n=560
1.90m 09:02 SLST · hourly feed → steady · -0.08 in 24h 0.50 m above Alert · higher than 85.1% of its history Alert 1.4Minor 1.7Major 2.8 22 Sep 09:30 → 27 Sep 09:02 SLST · shaded: usually, this time of year 0.66–2.68 m, median 1.90 (n=221) 98.9%Alert63.9%Minor4.6%Major chance of reaching each level within 24h · from 560 past readings in this state (level + trend) For reference: Cyclone Ditwah, Nov 2025 Peak 1.70 m on 27 Nov 2025, 12:30 SLST — 1.2× Alert. Today's 1.90 is 112% of it. 26 Nov 00:30 → 3 Dec 21:30 SLST 57 readings survive from the event in the archive · at its worst, 9 stations in a single report stood at Major Flood.
	4.71 m ▼	3.5	Minor floodMinor	10.1% Major · n=447
4.71m 09:11 SLST · hourly feed ▼ 0.02 m/h · -0.11 in 24h 1.21 m above Alert · higher than 95.6% of its history Alert 3.5Minor 4Major 5 22 Sep 09:30 → 27 Sep 09:11 SLST · shaded: usually, this time of year 2.71–4.82 m, median 4.19 (n=332) 97.8%Alert70.9%Minor10.1%Major chance of reaching each level within 24h · from 447 past readings in this state (level + trend) For reference: Cyclone Ditwah, Nov 2025 Peak 3.64 m on 26 Nov 2025, 09:30 SLST — 1.0× Alert. Today's 4.71 is 129% of it. 26 Nov 00:30 → 3 Dec 21:30 SLST 58 readings survive from the event in the archive · at its worst, 9 stations in a single report stood at Major Flood.
	5.40 m ▼	5	Alert	36.2% Minor · n=345
5.40m 09:03 SLST · hourly feed ▼ 0.04 m/h · -0.62 in 24h 0.40 m above Alert · higher than 70.6% of its history Alert 5Minor 6Major 7.5 22 Sep 09:30 → 27 Sep 09:03 SLST · shaded: usually, this time of year 3.86–6.83 m, median 5.94 (n=333) 91.9%Alert36.2%Minor2.3%Major chance of reaching each level within 24h · from 345 past readings in this state (level + trend) For reference: Cyclone Ditwah, Nov 2025 Peak 5.60 m on 27 Nov 2025, 06:30 SLST — 1.1× Alert. Today's 5.40 is 96% of it. 26 Nov 00:30 → 3 Dec 21:30 SLST 58 readings survive from the event in the archive · at its worst, 9 stations in a single report stood at Major Flood.
	2.82 m ▼	3	Normal	6.1% Alert · n=247
2.82m 09:03 SLST · hourly feed ▼ 0.02 m/h · -0.07 in 24h 0.18 m below Alert · higher than 72.4% of its history Alert 3Minor 4Major 5 22 Sep 09:30 → 27 Sep 09:03 SLST · shaded: usually, this time of year 1.21–3.64 m, median 2.84 (n=332) 6.1%Alert<1%Minor<1%Major chance of reaching each level within 24h · from 247 past readings in this state (level + trend) For reference: Cyclone Ditwah, Nov 2025 Peak 4.29 m on 1 Dec 2025, 00:30 SLST — 1.4× Alert. Today's 2.82 is 66% of it. 26 Nov 00:30 → 3 Dec 21:30 SLST 58 readings survive from the event in the archive · at its worst, 9 stations in a single report stood at Major Flood.
	8.53 m ▼	10	Normal	<2% Alert · n=186
8.53m 09:03 SLST · hourly feed ▼ 0.03 m/h · -0.44 in 24h 1.47 m below Alert · higher than 70.9% of its history Alert 10Minor 10.7Major 12.2 22 Sep 09:30 → 27 Sep 09:03 SLST · shaded: usually, this time of year 5.78–9.54 m, median 8.14 (n=330) <2%Alert<2%Minor<2%Major chance of reaching each level within 24h · from 186 past readings in this state (level + trend) For reference: Cyclone Ditwah, Nov 2025 Peak 12.01 m on 29 Nov 2025, 21:30 SLST — 1.2× Alert. Today's 8.53 is 71% of it. 26 Nov 00:30 → 3 Dec 21:30 SLST 40 readings survive from the event in the archive · at its worst, 9 stations in a single report stood at Major Flood.

Station

Level

Alert

Next level, 24h

1.90 m

1.4

Minor floodMinor

4.6% Major · n=560

4.71 m ▼

3.5

Minor floodMinor

10.1% Major · n=447

5.40 m ▼

Alert

36.2% Minor · n=345

2.82 m ▼

Normal

6.1% Alert · n=247

8.53 m ▼

Normal

<2% Alert · n=186

Station	Level	Alert		Next level, 24h
	12.10 m ▼	15	Normal	4.5% Alert · n=289
12.10m 09:06 SLST · hourly feed ▼ 0.05 m/h · -1.15 in 24h 2.90 m below Alert · higher than 70.3% of its history Alert 15Minor 15.5Major 19 22 Sep 09:30 → 27 Sep 09:06 SLST · shaded: usually, this time of year 10.17–13.80 m, median 11.77 (n=290) 4.5%Alert1.4%Minor<1%Major chance of reaching each level within 24h · from 289 past readings in this state (level + trend) For reference: Cyclone Ditwah, Nov 2025 Peak 21.90 m on 29 Nov 2025, 00:30 SLST — 1.5× Alert, 1.2× Major. Today's 12.10 is 55% of it. 26 Nov 00:30 → 3 Dec 21:30 SLST 58 readings survive from the event in the archive · at its worst, 9 stations in a single report stood at Major Flood.
	2.33 m ▼	3	Normal	2.2% Alert · n=180
2.33m 09:09 SLST · hourly feed ▼ 0.11 m/h · -0.30 in 24h 0.67 m below Alert · higher than 90.6% of its history Alert 3Minor 4Major 6 22 Sep 09:30 → 27 Sep 09:09 SLST · shaded: usually, this time of year 1.67–2.55 m, median 1.87 (n=282) 2.2%Alert<2%Minor<2%Major chance of reaching each level within 24h · from 180 past readings in this state (level + trend) For reference: Cyclone Ditwah, Nov 2025 Peak 6.48 m on 28 Nov 2025, 12:30 SLST — 2.2× Alert, 1.1× Major. Today's 2.33 is 36% of it. 26 Nov 00:30 → 3 Dec 21:30 SLST 58 readings survive from the event in the archive · at its worst, 9 stations in a single report stood at Major Flood.
	2.91 m ▼	4	Normal	10.2% Alert · n=147
2.91m 09:05 SLST · hourly feed ▼ 0.04 m/h · -1.25 in 24h 1.09 m below Alert · higher than 52.2% of its history Alert 4Minor 6Major 7.5 22 Sep 09:30 → 27 Sep 09:05 SLST · shaded: usually, this time of year 2.38–5.28 m, median 4.08 (n=220) 10.2%Alert<2%Minor<2%Major chance of reaching each level within 24h · from 147 past readings in this state (level + trend) For reference: Cyclone Ditwah, Nov 2025 Peak 5.46 m on 28 Nov 2025, 21:30 SLST — 1.4× Alert. Today's 2.91 is 53% of it. 26 Nov 00:30 → 3 Dec 21:30 SLST 58 readings survive from the event in the archive · at its worst, 9 stations in a single report stood at Major Flood.
	3.70 m ▼	5.2	Normal	9.7% Alert · n=186
3.70m 09:03 SLST · hourly feed ▼ 0.09 m/h · -1.38 in 24h 1.50 m below Alert · higher than 62.9% of its history Alert 5.2Minor 7.5Major 9.5 22 Sep 09:30 → 27 Sep 09:03 SLST · shaded: usually, this time of year 1.50–6.17 m, median 3.89 (n=322) 9.7%Alert1.1%Minor<2%Major chance of reaching each level within 24h · from 186 past readings in this state (level + trend) For reference: Cyclone Ditwah, Nov 2025 Peak 10.12 m on 28 Nov 2025, 21:30 SLST — 1.9× Alert, 1.1× Major. Today's 3.70 is 37% of it. 26 Nov 00:30 → 3 Dec 21:30 SLST 56 readings survive from the event in the archive · at its worst, 9 stations in a single report stood at Major Flood.
	2.30 m ▼	3.3	Normal	10% Alert · n=100
2.30m 09:03 SLST · hourly feed ▼ 0.02 m/h · -0.30 in 24h 1.00 m below Alert · higher than 45.6% of its history Alert 3.3Minor 4.4Major 5.5 22 Sep 09:30 → 27 Sep 09:03 SLST · shaded: usually, this time of year 1.64–4.63 m, median 3.26 (n=298) 10%Alert2%Minor<3%Major chance of reaching each level within 24h · from 100 past readings in this state (level + trend) For reference: Cyclone Ditwah, Nov 2025 Peak 7.04 m on 29 Nov 2025, 06:30 SLST — 2.1× Alert, 1.3× Major. Today's 2.30 is 33% of it. 26 Nov 00:30 → 3 Dec 21:30 SLST 58 readings survive from the event in the archive · at its worst, 9 stations in a single report stood at Major Flood.
	4.47 m ▼	6.5	Normal	1% Alert · n=193
4.47m 09:04 SLST · hourly feed ▼ 0.05 m/h · -1.20 in 24h 2.03 m below Alert · higher than 65.1% of its history Alert 6.5Minor 7.5Major 9.5 22 Sep 09:30 → 27 Sep 09:04 SLST · shaded: usually, this time of year 1.90–5.97 m, median 4.49 (n=290) 1%Alert<2%Minor<2%Major chance of reaching each level within 24h · from 193 past readings in this state (level + trend) For reference: Cyclone Ditwah, Nov 2025 Peak 10.95 m on 30 Nov 2025, 00:30 SLST — 1.6× Alert, 1.1× Major. Today's 4.47 is 41% of it. 26 Nov 00:30 → 3 Dec 21:30 SLST 58 readings survive from the event in the archive · at its worst, 9 stations in a single report stood at Major Flood.
	0.99 m ▼	1.5	Normal	4.6% Alert · n=432
0.99m 09:02 SLST · hourly feed ▼ 0.01 m/h · -0.18 in 24h 0.51 m below Alert · higher than 63.1% of its history Alert 1.5Minor 3Major 4.5 22 Sep 09:30 → 27 Sep 09:02 SLST · shaded: usually, this time of year 0.66–1.28 m, median 0.93 (n=290) 4.6%Alert<1%Minor<1%Major chance of reaching each level within 24h · from 432 past readings in this state (level + trend) For reference: Cyclone Ditwah, Nov 2025 Peak 3.60 m on 28 Nov 2025, 03:30 SLST — 2.4× Alert. Today's 0.99 is 28% of it. 26 Nov 00:30 → 3 Dec 21:30 SLST 51 readings survive from the event in the archive · at its worst, 9 stations in a single report stood at Major Flood.
	2.60 m ▼	4	Normal	11.3% Alert · n=248
2.60m 09:07 SLST · hourly feed ▼ 0.08 m/h · -0.34 in 24h 1.40 m below Alert · higher than 69.1% of its history Alert 4Minor 6Major 7.5 22 Sep 09:30 → 27 Sep 09:07 SLST · shaded: usually, this time of year 1.96–4.21 m, median 2.84 (n=322) 11.3%Alert4.4%Minor0.8%Major chance of reaching each level within 24h · from 248 past readings in this state (level + trend) For reference: Cyclone Ditwah, Nov 2025 Peak 4.12 m on 28 Nov 2025, 12:30 SLST — 1.0× Alert. Today's 2.60 is 63% of it. 26 Nov 00:30 → 3 Dec 21:30 SLST 58 readings survive from the event in the archive · at its worst, 9 stations in a single report stood at Major Flood.
	2.73 m ▼	5	Normal	0.9% Alert · n=352
2.73m 09:04 SLST · hourly feed ▼ 0.02 m/h · -0.24 in 24h 2.27 m below Alert · higher than 44.1% of its history Alert 5Minor 6.2Major 9.6 22 Sep 09:30 → 27 Sep 09:04 SLST · shaded: usually, this time of year 1.74–3.57 m, median 2.96 (n=250) 0.9%Alert<1%Minor<1%Major chance of reaching each level within 24h · from 352 past readings in this state (level + trend) For reference: Cyclone Ditwah, Nov 2025 Peak 13.46 m on 29 Nov 2025, 09:30 SLST — 2.7× Alert, 1.4× Major. Today's 2.73 is 20% of it. 26 Nov 00:30 → 3 Dec 21:30 SLST 52 readings survive from the event in the archive · at its worst, 9 stations in a single report stood at Major Flood.
	1.70 ft ▼	4	Normal	3.4% Alert · n=204
1.70ft 09:07 SLST · hourly feed ▼ 0.19 ft/h · -0.90 in 24h 2.30 ft below Alert · higher than 33.5% of its history Alert 4Minor 5Major 7 22 Sep 09:30 → 27 Sep 09:07 SLST · shaded: usually, this time of year 1.30–3.60 ft, median 2.70 (n=281) 3.4%Alert1%Minor<1%Major chance of reaching each level within 24h · from 204 past readings in this state (level + trend) For reference: Cyclone Ditwah, Nov 2025 Peak 8.50 ft on 1 Dec 2025, 12:30 SLST — 2.1× Alert, 1.2× Major. Today's 1.70 is 20% of it. 26 Nov 00:30 → 3 Dec 21:30 SLST 58 readings survive from the event in the archive · at its worst, 9 stations in a single report stood at Major Flood.
	0.87 m ▼	2.5	Normal	3.2% Alert · n=691
0.87m 09:05 SLST · hourly feed ▼ 0.01 m/h · -0.15 in 24h 1.63 m below Alert · higher than 60.7% of its history Alert 2.5Minor 4Major 6 22 Sep 09:30 → 27 Sep 09:05 SLST · shaded: usually, this time of year 0.23–1.82 m, median 1.10 (n=330) 3.2%Alert0.4%Minor<0%Major chance of reaching each level within 24h · from 691 past readings in this state (level + trend) For reference: Cyclone Ditwah, Nov 2025 Peak 2.97 m on 26 Nov 2025, 21:30 SLST — 1.2× Alert. Today's 0.87 is 29% of it. 26 Nov 03:30 → 3 Dec 21:30 SLST 57 readings survive from the event in the archive · at its worst, 9 stations in a single report stood at Major Flood.
	1.34 m ▼	4	Normal	2% Alert · n=201
1.34m 09:06 SLST · hourly feed ▼ 0.01 m/h · -0.83 in 24h 2.66 m below Alert · higher than 49.5% of its history Alert 4Minor 5Major 6.5 22 Sep 09:30 → 27 Sep 09:06 SLST · shaded: usually, this time of year 0.75–3.05 m, median 1.98 (n=331) 2%Alert0.5%Minor0.5%Major chance of reaching each level within 24h · from 201 past readings in this state (level + trend) For reference: Cyclone Ditwah, Nov 2025 Peak 2.77 m on 27 Nov 2025, 00:30 SLST — 0.7× Alert. Today's 1.34 is 48% of it. 26 Nov 00:30 → 3 Dec 21:30 SLST 58 readings survive from the event in the archive · at its worst, 9 stations in a single report stood at Major Flood.
	0.93 m ▲	3	Normal	0.5% Alert · n=553
0.93m 09:04 SLST · hourly feed ▲ 0.01 m/h · -0.14 in 24h 2.07 m below Alert · higher than 48.5% of its history Alert 3Minor 4Major 6 22 Sep 09:30 → 27 Sep 09:04 SLST · shaded: usually, this time of year 0.50–1.76 m, median 1.06 (n=290) 0.5%Alert<1%Minor<1%Major chance of reaching each level within 24h · from 553 past readings in this state (level + trend) For reference: Cyclone Ditwah, Nov 2025 Peak 7.27 m on 28 Nov 2025, 06:30 SLST — 2.4× Alert, 1.5× Major. Today's 0.93 is 13% of it. 26 Nov 00:30 → 3 Dec 21:30 SLST 52 readings survive from the event in the archive · at its worst, 9 stations in a single report stood at Major Flood.
	0.89 m ▼	3	Normal	0.2% Alert · n=522
0.89m 09:06 SLST · hourly feed ▼ 0.01 m/h · -0.11 in 24h 2.11 m below Alert · higher than 29% of its history Alert 3Minor 5Major 7 22 Sep 09:30 → 27 Sep 09:06 SLST · shaded: usually, this time of year 0.55–1.20 m, median 0.82 (n=121) 0.2%Alert<1%Minor<1%Major chance of reaching each level within 24h · from 522 past readings in this state (level + trend) For reference: Cyclone Ditwah, Nov 2025 Peak 4.78 m on 28 Nov 2025, 12:30 SLST — 1.6× Alert. Today's 0.89 is 19% of it. 26 Nov 00:30 → 3 Dec 21:30 SLST 58 readings survive from the event in the archive · at its worst, 9 stations in a single report stood at Major Flood.
	1.39 m ▼	4.8	Normal	0.9% Alert · n=439
1.39m 09:02 SLST · hourly feed ▼ 0.04 m/h · -0.57 in 24h 3.41 m below Alert · higher than 67.9% of its history Alert 4.8Minor 5.8Major 7 22 Sep 09:30 → 27 Sep 09:02 SLST · shaded: usually, this time of year 0.84–2.38 m, median 1.48 (n=289) 0.9%Alert0.2%Minor<1%Major chance of reaching each level within 24h · from 439 past readings in this state (level + trend) For reference: Cyclone Ditwah, Nov 2025 Peak 8.55 m on 28 Nov 2025, 12:30 SLST — 1.8× Alert, 1.3× Major. Today's 1.39 is 16% of it. 26 Nov 00:30 → 3 Dec 21:30 SLST 58 readings survive from the event in the archive · at its worst, 9 stations in a single report stood at Major Flood.
	1.15 m	4	Normal	0.2% Alert · n=593
1.15m 09:02 SLST · hourly feed → steady · +0.01 in 24h 2.85 m below Alert · higher than 66.5% of its history Alert 4Minor 5Major 5.5 22 Sep 09:30 → 27 Sep 09:02 SLST · shaded: usually, this time of year -0.18–1.15 m, median 1.08 (n=142) 0.2%Alert0.2%Minor<1%Major chance of reaching each level within 24h · from 593 past readings in this state (level + trend) For reference: Cyclone Ditwah, Nov 2025 Peak 5.52 m on 27 Nov 2025, 12:30 SLST — 1.4× Alert, 1.0× Major. Today's 1.15 is 21% of it. 26 Nov 00:30 → 3 Dec 21:30 SLST 58 readings survive from the event in the archive · at its worst, 9 stations in a single report stood at Major Flood.
	1.64 m	6	Normal	<1% Alert · n=550
1.64m 09:04 SLST · hourly feed → steady · +0.00 in 24h 4.36 m below Alert · higher than 44.2% of its history Alert 6Minor 7.5Major 10.5 22 Sep 09:30 → 27 Sep 09:04 SLST · shaded: usually, this time of year 1.23–1.81 m, median 1.64 (n=143) <1%Alert<1%Minor<1%Major chance of reaching each level within 24h · from 550 past readings in this state (level + trend) For reference: Cyclone Ditwah, Nov 2025 Peak 8.39 m on 28 Nov 2025, 12:30 SLST — 1.4× Alert. Today's 1.64 is 20% of it. 26 Nov 00:30 → 3 Dec 21:30 SLST 55 readings survive from the event in the archive · at its worst, 9 stations in a single report stood at Major Flood.
	1.42 m ▼	5.5	Normal	0.2% Alert · n=475
1.42m 09:03 SLST · hourly feed ▼ 0.01 m/h · -0.36 in 24h 4.08 m below Alert · higher than 37.2% of its history Alert 5.5Minor 6.5Major 7.5 22 Sep 09:30 → 27 Sep 09:03 SLST · shaded: usually, this time of year 0.95–2.47 m, median 1.78 (n=244) 0.2%Alert<1%Minor<1%Major chance of reaching each level within 24h · from 475 past readings in this state (level + trend) For reference: Cyclone Ditwah, Nov 2025 Peak 12.54 m on 29 Nov 2025, 06:30 SLST — 2.3× Alert, 1.7× Major. Today's 1.42 is 11% of it. 26 Nov 00:30 → 3 Dec 21:30 SLST 51 readings survive from the event in the archive · at its worst, 9 stations in a single report stood at Major Flood.
	1.02 m	4.4	Normal	<0% Alert · n=696
1.02m 09:01 SLST · hourly feed → steady · -0.09 in 24h 3.38 m below Alert · higher than 62.7% of its history Alert 4.4Minor 5.4Major 5.9 22 Sep 09:30 → 27 Sep 09:01 SLST · shaded: usually, this time of year 0.43–1.11 m, median 0.84 (n=152) <0%Alert<0%Minor<0%Major chance of reaching each level within 24h · from 696 past readings in this state (level + trend) For reference: Cyclone Ditwah, Nov 2025 Peak 3.18 m on 27 Nov 2025, 09:30 SLST — 0.7× Alert. Today's 1.02 is 32% of it. 26 Nov 00:30 → 3 Dec 21:30 SLST 58 readings survive from the event in the archive · at its worst, 9 stations in a single report stood at Major Flood.
	0.97 m	6.9	Normal	<0% Alert · n=722
0.97m 09:01 SLST · hourly feed → steady · -0.02 in 24h 5.93 m below Alert · higher than 9.8% of its history Alert 6.9Minor 8.4Major 8.8 22 Sep 09:30 → 27 Sep 09:01 SLST · shaded: usually, this time of year 0.95–1.38 m, median 1.04 (n=152) <0%Alert<0%Minor<0%Major chance of reaching each level within 24h · from 722 past readings in this state (level + trend) For reference: Cyclone Ditwah, Nov 2025 Peak 5.55 m on 27 Nov 2025, 09:30 SLST — 0.8× Alert. Today's 0.97 is 17% of it. 26 Nov 00:30 → 3 Dec 21:30 SLST 58 readings survive from the event in the archive · at its worst, 9 stations in a single report stood at Major Flood.
	0.52 m	5	Normal	0.1% Alert · n=676
0.52m 09:02 SLST · hourly feed → steady · -0.01 in 24h 4.48 m below Alert · higher than 2.1% of its history Alert 5Minor 6Major 7.5 22 Sep 09:30 → 27 Sep 09:02 SLST · shaded: usually, this time of year 0.53–0.90 m, median 0.57 (n=152) 0.1%Alert<0%Minor<0%Major chance of reaching each level within 24h · from 676 past readings in this state (level + trend) For reference: Cyclone Ditwah, Nov 2025 Peak 8.25 m on 27 Nov 2025, 06:30 SLST — 1.6× Alert, 1.1× Major. Today's 0.52 is 6% of it. 26 Nov 00:30 → 3 Dec 21:30 SLST 58 readings survive from the event in the archive · at its worst, 9 stations in a single report stood at Major Flood.
	0.41 m	4	Normal	0.5% Alert · n=660
0.41m 09:05 SLST · hourly feed → steady · +0.00 in 24h 3.59 m below Alert · higher than 15.7% of its history Alert 4Minor 5Major 6 22 Sep 09:30 → 27 Sep 09:05 SLST · shaded: usually, this time of year 0.36–0.41 m, median 0.41 (n=121) 0.5%Alert0.5%Minor<0%Major chance of reaching each level within 24h · from 660 past readings in this state (level + trend) For reference: Cyclone Ditwah, Nov 2025 Peak 5.74 m on 27 Nov 2025, 18:30 SLST — 1.4× Alert. Today's 0.41 is 7% of it. 26 Nov 00:30 → 3 Dec 21:30 SLST 44 readings survive from the event in the archive · at its worst, 9 stations in a single report stood at Major Flood.
	0.37 m	4.75	Normal	2.3% Alert · n=354
0.37m 09:01 SLST · hourly feed → steady · -0.01 in 24h 4.38 m below Alert · higher than 21.8% of its history Alert 4.75Minor 6Major 7 22 Sep 09:30 → 27 Sep 09:01 SLST · shaded: usually, this time of year -0.25–0.40 m, median 0.37 (n=83) 2.3%Alert<1%Minor<1%Major chance of reaching each level within 24h · from 354 past readings in this state (level + trend) For reference: Cyclone Ditwah, Nov 2025 Peak 8.33 m on 28 Nov 2025, 06:30 SLST — 1.8× Alert, 1.2× Major. Today's 0.37 is 4% of it. 26 Nov 00:30 → 28 Nov 06:30 SLST 14 readings survive from the event in the archive · at its worst, 9 stations in a single report stood at Major Flood. The gauge then reported nothing for 46 consecutive reports — so this peak is the last reading before it went silent, not necessarily the crest.
	0.08 m ▼	3	Normal	0.2% Alert · n=631
0.08m 09:02 SLST · hourly feed ▼ 0.05 m/h · -0.05 in 24h 2.92 m below Alert · higher than 0.6% of its history Alert 3Minor 4Major 5 22 Sep 09:30 → 27 Sep 09:02 SLST · shaded: usually, this time of year 0.11–0.53 m, median 0.25 (n=144) 0.2%Alert<0%Minor<0%Major chance of reaching each level within 24h · from 631 past readings in this state (level + trend) For reference: Cyclone Ditwah, Nov 2025 Peak 4.20 m on 27 Nov 2025, 06:30 SLST — 1.4× Alert. Today's 0.08 is 2% of it. 26 Nov 00:30 → 3 Dec 18:30 SLST 15 readings survive from the event in the archive · at its worst, 9 stations in a single report stood at Major Flood. The gauge then reported nothing for 1 consecutive reports — so this peak is the last reading before it went silent, not necessarily the crest.
	0.12 m	4.5	Normal	<0% Alert · n=686
0.12m 09:03 SLST · hourly feed → steady · -0.01 in 24h 4.38 m below Alert · higher than 0.9% of its history Alert 4.5Minor 6Major 7 22 Sep 09:30 → 27 Sep 09:03 SLST · shaded: usually, this time of year 0.13–0.42 m, median 0.15 (n=152) <0%Alert<0%Minor<0%Major chance of reaching each level within 24h · from 686 past readings in this state (level + trend) For reference: Cyclone Ditwah, Nov 2025 Peak 5.86 m on 26 Nov 2025, 21:30 SLST — 1.3× Alert. Today's 0.12 is 2% of it. 26 Nov 00:30 → 3 Dec 21:30 SLST 56 readings survive from the event in the archive · at its worst, 9 stations in a single report stood at Major Flood.
	0.05 m	4	Normal	0.3% Alert · n=668
0.05m 09:04 SLST · hourly feed → steady · +0.02 in 24h 3.95 m below Alert · higher than 6.4% of its history Alert 4Minor 4.5Major 6 22 Sep 09:30 → 27 Sep 09:04 SLST · shaded: usually, this time of year 0.03–0.32 m, median 0.10 (n=144) 0.3%Alert0.3%Minor<0%Major chance of reaching each level within 24h · from 668 past readings in this state (level + trend) For reference: Cyclone Ditwah, Nov 2025 Peak 6.65 m on 27 Nov 2025, 18:30 SLST — 1.7× Alert, 1.1× Major. Today's 0.05 is 1% of it. 26 Nov 00:30 → 3 Dec 18:30 SLST 29 readings survive from the event in the archive · at its worst, 9 stations in a single report stood at Major Flood. The gauge then reported nothing for 1 consecutive reports — so this peak is the last reading before it went silent, not necessarily the crest.
	-0.10 m ▼	3	Normal	—
-0.10m 09:01 SLST · hourly feed ▼ 0.05 m/h · -0.07 in 24h 3.10 m below Alert · higher than 28.7% of its history Alert 3Minor 4.3Major 6 22 Sep 09:30 → 27 Sep 09:01 SLST · shaded: usually, this time of year -1.39–0.07 m, median -0.23 (n=152) No base rate — this state has only 0 matching readings in 8.3 years (need 30) For reference: Cyclone Ditwah, Nov 2025 Peak 5.50 m on 27 Nov 2025, 18:30 SLST — 1.8× Alert. Today's -0.10 is -2% of it. 26 Nov 00:30 → 2 Dec 12:30 SLST 15 readings survive from the event in the archive · at its worst, 9 stations in a single report stood at Major Flood. The gauge then reported nothing for 12 consecutive reports — so this peak is the last reading before it went silent, not necessarily the crest.
	-0.29 m	4	Normal	—
-0.29m 09:02 SLST · hourly feed → steady · -0.01 in 24h 4.29 m below Alert · higher than 5% of its history Alert 4Minor 4.6Major 6.5 22 Sep 09:30 → 27 Sep 09:02 SLST · shaded: usually, this time of year -0.33–-0.23 m, median -0.26 (n=120) No base rate — this state has only 0 matching readings in 8.3 years (need 30) For reference: Cyclone Ditwah, Nov 2025 Peak 7.60 m on 28 Nov 2025, 15:30 SLST — 1.9× Alert, 1.2× Major. Today's -0.29 is -4% of it. 26 Nov 00:30 → 3 Dec 21:30 SLST 58 readings survive from the event in the archive · at its worst, 9 stations in a single report stood at Major Flood.
	-3.36 m ▼	5	Normal	—
-3.36m 09:01 SLST · hourly feed ▼ 0.07 m/h · -0.08 in 24h 8.36 m below Alert · higher than 2.3% of its history Alert 5Minor 6Major 8 22 Sep 09:30 → 27 Sep 09:01 SLST · shaded: usually, this time of year -3.15–-2.41 m, median -2.99 (n=120) No base rate — this state has only 0 matching readings in 8.3 years (need 30) For reference: Cyclone Ditwah, Nov 2025 Peak 7.90 m on 27 Nov 2025, 12:30 SLST — 1.6× Alert. Today's -3.36 is -43% of it. 26 Nov 00:30 → 27 Nov 12:30 SLST 11 readings survive from the event in the archive · at its worst, 9 stations in a single report stood at Major Flood. The gauge then reported nothing for 49 consecutive reports — so this peak is the last reading before it went silent, not necessarily the crest.

Peradeniya

Nawalapitiya

Closest to their thresholds