Mahaweli flood watch

Station	Level	Alert		Next level, 24h
	1.90 m	1.4	Minor floodMinor	4.7% Major · n=548
1.90m 17:06 SLST · hourly feed → steady · +0.20 in 24h 0.50 m above Alert · higher than 85.6% of its history Alert 1.4Minor 1.7Major 2.8 20 Sep 18:02 → 25 Sep 17:06 SLST · shaded: usually, this time of year 0.54–2.68 m, median 1.76 (n=201) 98.9%Alert63.1%Minor4.7%Major chance of reaching each level within 24h · from 548 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.
	4.74 m ▲	3.5	Minor floodMinor	10.3% Major · n=435
4.74m 17:01 SLST · hourly feed ▲ 0.01 m/h · +0.30 in 24h 1.24 m above Alert · higher than 96.4% of its history Alert 3.5Minor 4Major 5 20 Sep 18:04 → 25 Sep 17:01 SLST · shaded: usually, this time of year 2.59–4.84 m, median 4.18 (n=308) 97.7%Alert70.1%Minor10.3%Major chance of reaching each level within 24h · from 435 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 4.74 is 130% 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.
	6.39 m ▼	5	Minor floodMinor	2.4% Major · n=337
6.39m 17:03 SLST · hourly feed ▼ 0.03 m/h · -0.37 in 24h 1.39 m above Alert · higher than 90.7% of its history Alert 5Minor 6Major 7.5 20 Sep 18:05 → 25 Sep 17:03 SLST · shaded: usually, this time of year 3.79–6.84 m, median 5.86 (n=309) 91.7%Alert35.6%Minor2.4%Major chance of reaching each level within 24h · from 337 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 6.39 is 114% 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.
	4.80 m	4	Alert	5.4% Minor · n=92
4.80m 17:05 SLST · hourly feed → steady · -0.17 in 24h 0.80 m above Alert · higher than 86.7% of its history Alert 4Minor 6Major 7.5 20 Sep 18:00 → 25 Sep 17:05 SLST · shaded: usually, this time of year 2.33–5.25 m, median 4.04 (n=200) 95.7%Alert5.4%Minor<3%Major chance of reaching each level within 24h · from 92 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 4.80 is 88% 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.
	6.07 m ▼	5.2	Alert	10.1% Minor · n=198
6.07m 17:02 SLST · hourly feed ▼ 0.01 m/h · +0.12 in 24h 0.87 m above Alert · higher than 90.9% of its history Alert 5.2Minor 7.5Major 9.5 20 Sep 18:03 → 25 Sep 17:02 SLST · shaded: usually, this time of year 1.43–6.10 m, median 3.68 (n=298) 88.4%Alert10.1%Minor<2%Major chance of reaching each level within 24h · from 198 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 6.07 is 60% 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.
	3.09 m ▲	3	Alert	27.9% Minor · n=43
3.09m 17:04 SLST · hourly feed ▲ 0.04 m/h · +0.37 in 24h 0.09 m above Alert · higher than 98.3% of its history Alert 3Minor 4Major 6 20 Sep 18:03 → 25 Sep 17:04 SLST · shaded: usually, this time of year 1.66–2.25 m, median 1.86 (n=258) 62.8%Alert27.9%Minor18.6%Major chance of reaching each level within 24h · from 43 past readings in this state (level only) 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 3.09 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.

Station

Level

Alert

Next level, 24h

1.90 m

1.4

Minor floodMinor

4.7% Major · n=548

4.74 m ▲

3.5

Minor floodMinor

10.3% Major · n=435

6.39 m ▼

Minor floodMinor

2.4% Major · n=337

4.80 m

Alert

5.4% Minor · n=92

6.07 m ▼

5.2

Alert

10.1% Minor · n=198

3.09 m ▲

Alert

27.9% Minor · n=43

Station	Level	Alert		Next level, 24h
	2.81 m ▲	3	Normal	6.4% Alert · n=235
2.81m 17:04 SLST · hourly feed ▲ 0.01 m/h · 0.19 m below Alert · +0.17 in 24h 0.19 m below Alert · higher than 72.4% of its history Alert 3Minor 4Major 5 20 Sep 18:00 → 25 Sep 17:04 SLST · shaded: usually, this time of year 1.05–3.74 m, median 2.82 (n=308) 6.4%Alert<1%Minor<1%Major chance of reaching each level within 24h · from 235 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 2.81 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.
	6.05 m ▼	6.5	Normal	1.7% Alert · n=120
6.05m 17:03 SLST · hourly feed ▼ 0.05 m/h · +0.71 in 24h 0.45 m below Alert · higher than 85.4% of its history Alert 6.5Minor 7.5Major 9.5 20 Sep 18:03 → 25 Sep 17:03 SLST · shaded: usually, this time of year 1.87–5.91 m, median 4.42 (n=266) 1.7%Alert<2%Minor<2%Major chance of reaching each level within 24h · from 120 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 6.05 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.
	1.39 m ▼	1.5	Normal	22.3% Alert · n=103
1.39m 17:02 SLST · hourly feed ▼ 0.01 m/h · -0.01 in 24h 0.11 m below Alert · higher than 91.6% of its history Alert 1.5Minor 3Major 4.5 20 Sep 18:02 → 25 Sep 17:02 SLST · shaded: usually, this time of year 0.65–1.24 m, median 0.91 (n=266) 22.3%Alert<3%Minor<3%Major chance of reaching each level within 24h · from 103 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 1.39 is 39% 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.
	13.65 m ▼	15	Normal	4.6% Alert · n=280
13.65m 17:05 SLST · hourly feed ▼ 0.09 m/h · -0.23 in 24h 1.35 m below Alert · higher than 87.6% of its history Alert 15Minor 15.5Major 19 20 Sep 18:03 → 25 Sep 17:05 SLST · shaded: usually, this time of year 10.06–13.62 m, median 11.75 (n=266) 4.6%Alert1.4%Minor<1%Major chance of reaching each level within 24h · from 280 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 13.65 is 62% 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.
	3.56 m	4	Normal	18.2% Alert · n=55
3.56m 17:20 SLST · hourly feed → steady · -1.71 in 24h 0.44 m below Alert · higher than 90.4% of its history Alert 4Minor 6Major 7.5 20 Sep 18:02 → 25 Sep 17:20 SLST · shaded: usually, this time of year 1.95–4.30 m, median 2.79 (n=298) 18.2%Alert5.5%Minor<5%Major chance of reaching each level within 24h · from 55 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 3.56 is 86% 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.
	8.86 m ▲	10	Normal	1.8% Alert · n=277
8.86m 17:03 SLST · hourly feed ▲ 0.02 m/h · +0.75 in 24h 1.14 m below Alert · higher than 80.6% of its history Alert 10Minor 10.7Major 12.2 20 Sep 18:01 → 25 Sep 17:03 SLST · shaded: usually, this time of year 5.67–9.64 m, median 7.98 (n=306) 1.8%Alert1.1%Minor0.4%Major chance of reaching each level within 24h · from 277 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 8.86 is 74% 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.
	2.78 m ▼	3.3	Normal	18.8% Alert · n=85
2.78m 17:08 SLST · hourly feed ▼ 0.04 m/h · -0.12 in 24h 0.52 m below Alert · higher than 56.4% of its history Alert 3.3Minor 4.4Major 5.5 20 Sep 18:30 → 25 Sep 17:08 SLST · shaded: usually, this time of year 1.47–4.57 m, median 3.33 (n=274) 18.8%Alert7.1%Minor<4%Major chance of reaching each level within 24h · from 85 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 2.78 is 39% 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.
	3.30 ft ▼	4	Normal	35.8% Alert · n=81
3.30ft 17:01 SLST · hourly feed ▼ 0.30 ft/h · +0.80 in 24h 0.70 ft below Alert · higher than 83.1% of its history Alert 4Minor 5Major 7 20 Sep 18:05 → 25 Sep 17:01 SLST · shaded: usually, this time of year 1.10–3.60 ft, median 2.60 (n=257) 35.8%Alert2.5%Minor<4%Major chance of reaching each level within 24h · from 81 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 3.30 is 39% 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.
	3.09 m ▲	5	Normal	0.9% Alert · n=214
3.09m 17:05 SLST · hourly feed ▲ 0.01 m/h · +0.11 in 24h 1.91 m below Alert · higher than 58.6% of its history Alert 5Minor 6.2Major 9.6 20 Sep 18:04 → 25 Sep 17:05 SLST · shaded: usually, this time of year 1.74–3.55 m, median 2.93 (n=229) 0.9%Alert<1%Minor<1%Major chance of reaching each level within 24h · from 214 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 3.09 is 23% 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.
	2.43 m ▼	4	Normal	5.1% Alert · n=198
2.43m 17:00 SLST · hourly feed ▼ 0.01 m/h · -1.47 in 24h 1.57 m below Alert · higher than 89.2% of its history Alert 4Minor 5Major 6.5 20 Sep 18:04 → 25 Sep 17:00 SLST · shaded: usually, this time of year 0.74–3.09 m, median 1.94 (n=308) 5.1%Alert3%Minor<2%Major chance of reaching each level within 24h · from 198 past readings in this state (level only) For reference: Cyclone Ditwah, Nov 2025 Peak 2.77 m on 27 Nov 2025, 00:30 SLST — 0.7× Alert. Today's 2.43 is 88% 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.
	1.35 m ▼	2.5	Normal	5.9% Alert · n=135
1.35m 16:16 SLST · hourly feed ▼ 0.04 m/h · -0.73 in 24h 1.15 m below Alert · higher than 85% of its history Alert 2.5Minor 4Major 6 20 Sep 18:04 → 25 Sep 16:16 SLST · shaded: usually, this time of year 0.23–1.84 m, median 1.11 (n=306) 5.9%Alert3%Minor<2%Major chance of reaching each level within 24h · from 135 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 1.35 is 45% 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.
	2.32 m	4.8	Normal	2.5% Alert · n=40
2.32m 17:02 SLST · hourly feed → steady · -0.03 in 24h 2.48 m below Alert · higher than 91.9% of its history Alert 4.8Minor 5.8Major 7 20 Sep 18:04 → 25 Sep 17:02 SLST · shaded: usually, this time of year 0.81–2.32 m, median 1.45 (n=265) 2.5%Alert<8%Minor<8%Major chance of reaching each level within 24h · from 40 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 2.32 is 27% 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.
	1.26 m ▲	3	Normal	4.4% Alert · n=91
1.26m 17:06 SLST · hourly feed ▲ 0.01 m/h · -0.72 in 24h 1.74 m below Alert · higher than 69.3% of its history Alert 3Minor 4Major 6 20 Sep 18:30 → 25 Sep 17:06 SLST · shaded: usually, this time of year 0.47–1.73 m, median 1.07 (n=266) 4.4%Alert3.3%Minor1.1%Major chance of reaching each level within 24h · from 91 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 1.26 is 17% 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.
	1.22 m ▼	3	Normal	8.2% Alert · n=49
1.22m 17:12 SLST · hourly feed ▼ 0.07 m/h · -0.24 in 24h 1.78 m below Alert · higher than 71.3% of its history Alert 3Minor 5Major 7 20 Sep 18:04 → 25 Sep 17:12 SLST · shaded: usually, this time of year 0.55–1.20 m, median 0.76 (n=107) 8.2%Alert<6%Minor<6%Major chance of reaching each level within 24h · from 49 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 1.22 is 26% 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.
	2.00 m ▲	5.5	Normal	0.2% Alert · n=465
2.00m 17:08 SLST · hourly feed ▲ 0.02 m/h · +0.06 in 24h 3.50 m below Alert · higher than 61.7% of its history Alert 5.5Minor 6.5Major 7.5 20 Sep 18:01 → 25 Sep 17:08 SLST · shaded: usually, this time of year 0.89–2.46 m, median 1.77 (n=223) 0.2%Alert<1%Minor<1%Major chance of reaching each level within 24h · from 465 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 2.00 is 16% 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.
	1.13 m ▲	4	Normal	0.2% Alert · n=581
1.13m 17:02 SLST · hourly feed ▲ 0.01 m/h · +0.03 in 24h 2.87 m below Alert · higher than 65.4% of its history Alert 4Minor 5Major 5.5 20 Sep 18:02 → 25 Sep 17:02 SLST · shaded: usually, this time of year -0.19–1.13 m, median 0.69 (n=127) 0.2%Alert0.2%Minor<1%Major chance of reaching each level within 24h · from 581 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 1.13 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.
	1.64 m	6	Normal	<1% Alert · n=538
1.64m 17:01 SLST · hourly feed → steady · +0.00 in 24h 4.36 m below Alert · higher than 43.8% of its history Alert 6Minor 7.5Major 10.5 20 Sep 18:01 → 25 Sep 17:01 SLST · shaded: usually, this time of year 1.22–1.82 m, median 1.62 (n=128) <1%Alert<1%Minor<1%Major chance of reaching each level within 24h · from 538 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.
	1.05 m	4.4	Normal	<0% Alert · n=685
1.05m 17:01 SLST · hourly feed → steady · +0.11 in 24h 3.35 m below Alert · higher than 66.4% of its history Alert 4.4Minor 5.4Major 5.9 20 Sep 18:02 → 25 Sep 17:01 SLST · shaded: usually, this time of year 0.42–1.08 m, median 0.73 (n=137) <0%Alert<0%Minor<0%Major chance of reaching each level within 24h · from 685 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 1.05 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.
	1.01 m	6.9	Normal	<0% Alert · n=710
1.01m 17:17 SLST · hourly feed → steady · -0.01 in 24h 5.89 m below Alert · higher than 11.4% of its history Alert 6.9Minor 8.4Major 8.8 20 Sep 18:01 → 25 Sep 17:17 SLST · shaded: usually, this time of year 0.93–1.35 m, median 1.04 (n=137) <0%Alert<0%Minor<0%Major chance of reaching each level within 24h · from 710 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 1.01 is 18% 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.
	0.53 m	5	Normal	0.2% Alert · n=664
0.53m 17:02 SLST · hourly feed → steady · -0.01 in 24h 4.47 m below Alert · higher than 2.5% of its history Alert 5Minor 6Major 7.5 20 Sep 18:00 → 25 Sep 17:02 SLST · shaded: usually, this time of year 0.53–0.82 m, median 0.58 (n=137) 0.2%Alert<0%Minor<0%Major chance of reaching each level within 24h · from 664 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 0.53 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=649
0.41m 17:02 SLST · hourly feed → steady · +0.00 in 24h 3.59 m below Alert · higher than 15% of its history Alert 4Minor 5Major 6 20 Sep 18:01 → 25 Sep 17:02 SLST · shaded: usually, this time of year 0.36–0.41 m, median 0.41 (n=109) 0.5%Alert0.5%Minor<0%Major chance of reaching each level within 24h · from 649 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.
	0.39 m	4.75	Normal	2.3% Alert · n=342
0.39m 17:14 SLST · hourly feed → steady · -0.01 in 24h 4.36 m below Alert · higher than 24.5% of its history Alert 4.75Minor 6Major 7 20 Sep 18:02 → 25 Sep 17:14 SLST · shaded: usually, this time of year -0.25–0.39 m, median 0.01 (n=68) 2.3%Alert<1%Minor<1%Major chance of reaching each level within 24h · from 342 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 0.39 is 5% 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.
	0.38 m ▼	5	Normal	<1% Alert · n=275
0.38m 17:03 SLST · hourly feed ▼ 0.01 m/h · -0.03 in 24h 4.62 m below Alert · higher than 2.8% of its history Alert 5Minor 6.8Major 7.8 20 Sep 18:02 → 25 Sep 17:03 SLST · shaded: usually, this time of year 0.31–0.78 m, median 0.42 (n=96) <1%Alert<1%Minor<1%Major chance of reaching each level within 24h · from 275 past readings in this state (level + trend) For reference: Cyclone Ditwah, Nov 2025 Peak 10.86 m on 30 Nov 2025, 18:30 SLST — 2.2× Alert, 1.4× Major. Today's 0.38 is 3% of it. 26 Nov 00:30 → 3 Dec 21:30 SLST 39 readings survive from the event in the archive · at its worst, 9 stations in a single report stood at Major Flood.
	0.15 m	3	Normal	<9% Alert · n=33
0.15m 17:04 SLST · hourly feed → steady · +0.00 in 24h 2.85 m below Alert · higher than 7.5% of its history Alert 3Minor 4Major 5 20 Sep 18:05 → 25 Sep 17:04 SLST · shaded: usually, this time of year 0.12–0.52 m, median 0.25 (n=129) <9%Alert<9%Minor<9%Major chance of reaching each level within 24h · from 33 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 0.15 is 4% 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.
	0.13 m	4.5	Normal	<0% Alert · n=674
0.13m 17:00 SLST · hourly feed → steady · -0.02 in 24h 4.37 m below Alert · higher than 1.6% of its history Alert 4.5Minor 6Major 7 20 Sep 18:02 → 25 Sep 17:00 SLST · shaded: usually, this time of year 0.13–0.37 m, median 0.15 (n=137) <0%Alert<0%Minor<0%Major chance of reaching each level within 24h · from 674 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 0.13 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.
	0.03 m	4	Normal	0.3% Alert · n=656
0.03m 17:17 SLST · hourly feed → steady · -0.05 in 24h 3.97 m below Alert · higher than 2.5% of its history Alert 4Minor 4.5Major 6 20 Sep 18:05 → 25 Sep 17:17 SLST · shaded: usually, this time of year 0.04–0.26 m, median 0.10 (n=129) 0.3%Alert0.3%Minor<0%Major chance of reaching each level within 24h · from 656 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 0.03 is 0% 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.
	0.01 m	4.84	Normal	<1% Alert · n=226
0.01m 17:02 SLST · hourly feed → steady · -0.01 in 24h 4.83 m below Alert · higher than 13.3% of its history Alert 4.84Minor 5.94Major 8 20 Sep 18:03 → 25 Sep 17:02 SLST · shaded: usually, this time of year -0.11–0.24 m, median -0.02 (n=108) <1%Alert<1%Minor<1%Major chance of reaching each level within 24h · from 226 past readings in this state (level + trend) For reference: Cyclone Ditwah, Nov 2025 Peak 6.12 m on 27 Nov 2025, 18:30 SLST — 1.3× Alert. Today's 0.01 is 0% of it. 26 Nov 09:30 → 3 Dec 18:30 SLST 18 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.
	-0.25 m	4	Normal	—
-0.25m 17:04 SLST · hourly feed → steady · -0.01 in 24h 4.25 m below Alert · higher than 14.2% of its history Alert 4Minor 4.6Major 6.5 20 Sep 18:05 → 25 Sep 17:04 SLST · shaded: usually, this time of year -0.33–-0.23 m, median -0.27 (n=106) 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 -0.25 is -3% 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.
	-0.25 m	3	Normal	—
-0.25m 17:01 SLST · hourly feed → steady · +0.01 in 24h 3.25 m below Alert · higher than 19.3% of its history Alert 3Minor 4.3Major 6 20 Sep 18:30 → 25 Sep 17:01 SLST · shaded: usually, this time of year -1.40–-0.03 m, median -0.26 (n=137) 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 -0.25 is -5% 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.
	-2.80 m ▼	5	Normal	—
-2.80m 17:02 SLST · hourly feed ▼ 0.02 m/h · +0.36 in 24h 7.80 m below Alert · higher than 42.2% of its history Alert 5Minor 6Major 8 20 Sep 18:00 → 25 Sep 17:02 SLST · shaded: usually, this time of year -3.14–-2.47 m, median -2.99 (n=112) 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 -2.80 is -35% 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