Mahaweli flood watch

Station	Level	Alert		Next level, 24h
	6.74 m ▼	5	Minor floodMinor	6.3% Major · n=268
6.74m 21:14 SLST · hourly feed ▼ 0.01 m/h · +2.35 in 24h 1.74 m above Alert · higher than 95.3% of its history Alert 5Minor 6Major 7.5 19 Sep 22:03 → 24 Sep 21:14 SLST · shaded: usually, this time of year 3.64–6.85 m, median 5.78 (n=293) 96.6%Alert52.2%Minor6.3%Major chance of reaching each level within 24h · from 268 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 6.74 is 120% 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.
	4.52 m ▲	3.5	Minor floodMinor	16.3% Major · n=135
4.52m 21:08 SLST · hourly feed ▲ 0.02 m/h · +0.85 in 24h 1.02 m above Alert · higher than 94.1% of its history Alert 3.5Minor 4Major 5 19 Sep 22:03 → 24 Sep 21:08 SLST · shaded: usually, this time of year 2.52–4.86 m, median 4.11 (n=292) 100%Alert84.4%Minor16.3%Major chance of reaching each level within 24h · from 135 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 4.52 is 124% 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.
	5.12 m ▼	4	Alert	13.7% Minor · n=51
5.12m 21:02 SLST · hourly feed ▼ 0.02 m/h · +2.15 in 24h 1.12 m above Alert · higher than 97.4% of its history Alert 4Minor 6Major 7.5 19 Sep 22:04 → 24 Sep 21:02 SLST · shaded: usually, this time of year 1.90–4.19 m, median 2.79 (n=282) 60.8%Alert13.7%Minor<6%Major chance of reaching each level within 24h · from 51 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 5.12 is 124% 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.
	5.05 m ▲	4	Alert	15.5% Minor · n=110
5.05m 21:02 SLST · hourly feed ▲ 0.01 m/h · +1.23 in 24h 1.05 m above Alert · higher than 89.9% of its history Alert 4Minor 6Major 7.5 19 Sep 22:29 → 24 Sep 21:02 SLST · shaded: usually, this time of year 2.29–5.25 m, median 4.02 (n=189) 98.2%Alert15.5%Minor<3%Major chance of reaching each level within 24h · from 110 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 5.05 is 92% 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.
	1.72 m	1.4	Minor floodMinor	4.8% Major · n=543
1.72m 21:10 SLST · hourly feed → steady · +0.45 in 24h 0.32 m above Alert · higher than 79.5% of its history Alert 1.4Minor 1.7Major 2.8 19 Sep 22:08 → 24 Sep 21:10 SLST · shaded: usually, this time of year 0.47–2.68 m, median 1.69 (n=190) 98.9%Alert62.4%Minor4.8%Major chance of reaching each level within 24h · from 543 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 1.72 is 101% 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.
	6.17 m ▲	5.2	Alert	28.1% Minor · n=32
6.17m 21:04 SLST · hourly feed ▲ 0.15 m/h · +1.94 in 24h 0.97 m above Alert · higher than 92.3% of its history Alert 5.2Minor 7.5Major 9.5 19 Sep 22:14 → 24 Sep 21:04 SLST · shaded: usually, this time of year 1.45–5.94 m, median 3.70 (n=282) 90.6%Alert28.1%Minor<9%Major chance of reaching each level within 24h · from 32 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 6.17 is 61% 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.
	3.30 m ▼	3	Alert	28.6% Minor · n=42
3.30m 21:08 SLST · hourly feed ▼ 0.24 m/h · +1.04 in 24h 0.30 m above Alert · higher than 98.9% of its history Alert 3Minor 4Major 6 19 Sep 22:01 → 24 Sep 21:08 SLST · shaded: usually, this time of year 1.65–2.20 m, median 1.86 (n=242) 64.3%Alert28.6%Minor19%Major chance of reaching each level within 24h · from 42 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 3.30 is 51% 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.
	1.55 m ▲	1.5	Alert	11.1% Minor · n=117
1.55m 21:06 SLST · hourly feed ▲ 0.04 m/h · +0.65 in 24h 0.05 m above Alert · higher than 95.9% of its history Alert 1.5Minor 3Major 4.5 19 Sep 22:02 → 24 Sep 21:06 SLST · shaded: usually, this time of year 0.65–1.19 m, median 0.90 (n=250) 76.1%Alert11.1%Minor4.3%Major chance of reaching each level within 24h · from 117 past readings in this state (level only) For reference: Cyclone Ditwah, Nov 2025 Peak 3.60 m on 28 Nov 2025, 03:30 SLST — 2.4× Alert. Today's 1.55 is 43% 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.

Station

Level

Alert

Next level, 24h

6.74 m ▼

Minor floodMinor

6.3% Major · n=268

4.52 m ▲

3.5

Minor floodMinor

16.3% Major · n=135

5.12 m ▼

Alert

13.7% Minor · n=51

5.05 m ▲

Alert

15.5% Minor · n=110

1.72 m

1.4

Minor floodMinor

4.8% Major · n=543

6.17 m ▲

5.2

Alert

28.1% Minor · n=32

3.30 m ▼

Alert

28.6% Minor · n=42

1.55 m ▲

1.5

Alert

11.1% Minor · n=117

Station	Level	Alert		Next level, 24h
	3.16 m ▲	3.3	Normal	70% Alert · n=30
3.16m 21:02 SLST · hourly feed ▲ 0.02 m/h · Alert in ~7h at this rate · +0.70 in 24h 0.14 m below Alert · higher than 61.8% of its history Alert 3.3Minor 4.4Major 5.5 19 Sep 22:00 → 24 Sep 21:02 SLST · shaded: usually, this time of year 1.26–4.63 m, median 3.36 (n=258) 70%Alert20%Minor6.7%Major chance of reaching each level within 24h · from 30 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 3.16 is 45% 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.
	14.21 m ▲	15	Normal	4.3% Alert · n=92
14.21m 21:02 SLST · hourly feed ▲ 0.13 m/h · Alert in ~6h at this rate · +1.65 in 24h 0.79 m below Alert · higher than 90.4% of its history Alert 15Minor 15.5Major 19 19 Sep 22:03 → 24 Sep 21:02 SLST · shaded: usually, this time of year 9.90–13.49 m, median 11.75 (n=250) 4.3%Alert3.3%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 21.90 m on 29 Nov 2025, 00:30 SLST — 1.5× Alert, 1.2× Major. Today's 14.21 is 65% 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.
	2.67 m	3	Normal	6.6% Alert · n=228
2.67m 21:07 SLST · hourly feed → steady · -0.09 in 24h 0.33 m below Alert · higher than 68.8% of its history Alert 3Minor 4Major 5 19 Sep 22:06 → 24 Sep 21:07 SLST · shaded: usually, this time of year 1.03–3.80 m, median 2.84 (n=292) 6.6%Alert<1%Minor<1%Major chance of reaching each level within 24h · from 228 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 2.67 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.
	5.67 m ▲	6.5	Normal	10.6% Alert · n=47
5.67m 21:02 SLST · hourly feed ▲ 0.09 m/h · Alert in ~9h at this rate · +1.07 in 24h 0.83 m below Alert · higher than 80.7% of its history Alert 6.5Minor 7.5Major 9.5 19 Sep 22:02 → 24 Sep 21:02 SLST · shaded: usually, this time of year 1.75–5.88 m, median 4.42 (n=250) 10.6%Alert2.1%Minor<6%Major chance of reaching each level within 24h · from 47 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 5.67 is 52% 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.
	8.35 m ▲	10	Normal	23.5% Alert · n=179
8.35m 21:03 SLST · hourly feed ▲ 0.07 m/h · Alert in ~24h at this rate · +0.53 in 24h 1.65 m below Alert · higher than 67.2% of its history Alert 10Minor 10.7Major 12.2 19 Sep 22:01 → 24 Sep 21:03 SLST · shaded: usually, this time of year 5.57–9.69 m, median 8.02 (n=290) 23.5%Alert2.2%Minor0.6%Major chance of reaching each level within 24h · from 179 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 8.35 is 70% 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.
	3.20 m ▼	4	Normal	5.8% Alert · n=52
3.20m 21:05 SLST · hourly feed ▼ 0.12 m/h · +1.60 in 24h 0.80 m below Alert · higher than 96% of its history Alert 4Minor 5Major 6.5 19 Sep 22:02 → 24 Sep 21:05 SLST · shaded: usually, this time of year 0.72–3.09 m, median 1.94 (n=292) 5.8%Alert<6%Minor<6%Major chance of reaching each level within 24h · from 52 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 3.20 is 116% 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.
	2.39 m ▼	3	Normal	14.4% Alert · n=153
2.39m 21:07 SLST · hourly feed ▼ 0.22 m/h · +1.03 in 24h 0.61 m below Alert · higher than 94.3% of its history Alert 3Minor 4Major 6 19 Sep 22:04 → 24 Sep 21:07 SLST · shaded: usually, this time of year 0.43–1.73 m, median 1.05 (n=250) 14.4%Alert7.8%Minor2%Major chance of reaching each level within 24h · from 153 past readings in this state (level only) 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 2.39 is 33% 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.
	3.73 m ▼	4.8	Normal	17.9% Alert · n=56
3.73m 21:03 SLST · hourly feed ▼ 0.61 m/h · +1.71 in 24h 1.07 m below Alert · higher than 98.1% of its history Alert 4.8Minor 5.8Major 7 19 Sep 22:08 → 24 Sep 21:03 SLST · shaded: usually, this time of year 0.79–2.27 m, median 1.46 (n=249) 17.9%Alert8.9%Minor3.6%Major chance of reaching each level within 24h · from 56 past readings in this state (level only) 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 3.73 is 44% 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.
	1.72 m ▼	2.5	Normal	6.7% Alert · n=60
1.72m 21:08 SLST · hourly feed ▼ 0.06 m/h · +0.54 in 24h 0.78 m below Alert · higher than 92.9% of its history Alert 2.5Minor 4Major 6 19 Sep 22:13 → 24 Sep 21:08 SLST · shaded: usually, this time of year 0.19–1.87 m, median 1.11 (n=290) 6.7%Alert3.3%Minor<5%Major chance of reaching each level within 24h · from 60 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 1.72 is 58% 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.
	3.08 m ▲	5	Normal	13.3% Alert · n=75
3.08m 21:06 SLST · hourly feed ▲ 0.03 m/h · +0.46 in 24h 1.92 m below Alert · higher than 58.4% of its history Alert 5Minor 6.2Major 9.6 19 Sep 22:04 → 24 Sep 21:06 SLST · shaded: usually, this time of year 1.74–3.53 m, median 2.88 (n=218) 13.3%Alert4%Minor<4%Major chance of reaching each level within 24h · from 75 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 3.08 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.
	2.40 ft ▲	4	Normal	7.7% Alert · n=39
2.40ft 21:05 SLST · hourly feed ▲ 0.10 ft/h · Alert in ~16h at this rate · +0.20 in 24h 1.60 ft below Alert · higher than 59.9% of its history Alert 4Minor 5Major 7 19 Sep 22:05 → 24 Sep 21:05 SLST · shaded: usually, this time of year 1.00–3.60 ft, median 2.55 (n=241) 7.7%Alert2.6%Minor<8%Major chance of reaching each level within 24h · from 39 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 2.40 is 28% 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.
	1.40 m ▼	3	Normal	1.1% Alert · n=91
1.40m 21:00 SLST · hourly feed ▼ 0.02 m/h · +0.60 in 24h 1.60 m below Alert · higher than 80.4% of its history Alert 3Minor 5Major 7 19 Sep 22:05 → 24 Sep 21:00 SLST · shaded: usually, this time of year 0.55–1.02 m, median 0.75 (n=102) 1.1%Alert<3%Minor<3%Major chance of reaching each level within 24h · from 91 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 1.40 is 29% 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.
	2.35 m ▲	5.5	Normal	8.2% Alert · n=49
2.35m 21:02 SLST · hourly feed ▲ 0.07 m/h · Alert in ~44h at this rate · +0.95 in 24h 3.15 m below Alert · higher than 71.9% of its history Alert 5.5Minor 6.5Major 7.5 19 Sep 22:06 → 24 Sep 21:02 SLST · shaded: usually, this time of year 0.88–2.43 m, median 1.66 (n=212) 8.2%Alert6.1%Minor6.1%Major chance of reaching each level within 24h · from 49 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 2.35 is 19% 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.
	1.10 m	4	Normal	0.2% Alert · n=574
1.10m 21:04 SLST · hourly feed → steady · +0.00 in 24h 2.90 m below Alert · higher than 63% of its history Alert 4Minor 5Major 5.5 19 Sep 22:02 → 24 Sep 21:04 SLST · shaded: usually, this time of year -0.21–1.13 m, median 0.41 (n=122) 0.2%Alert0.2%Minor<1%Major chance of reaching each level within 24h · from 574 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 1.10 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=531
1.64m 21:07 SLST · hourly feed → steady · -0.02 in 24h 4.36 m below Alert · higher than 43.6% of its history Alert 6Minor 7.5Major 10.5 19 Sep 22:07 → 24 Sep 21:07 SLST · shaded: usually, this time of year 1.20–1.82 m, median 1.52 (n=123) <1%Alert<1%Minor<1%Major chance of reaching each level within 24h · from 531 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.
	0.98 m ▲	4.4	Normal	<0% Alert · n=678
0.98m 21:00 SLST · hourly feed ▲ 0.02 m/h · +0.07 in 24h 3.42 m below Alert · higher than 60.5% of its history Alert 4.4Minor 5.4Major 5.9 19 Sep 22:03 → 24 Sep 21:00 SLST · shaded: usually, this time of year 0.42–1.06 m, median 0.66 (n=132) <0%Alert<0%Minor<0%Major chance of reaching each level within 24h · from 678 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 0.98 is 31% 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=703
1.01m 21:01 SLST · hourly feed → steady · +0.02 in 24h 5.89 m below Alert · higher than 11.2% of its history Alert 6.9Minor 8.4Major 8.8 19 Sep 22:05 → 24 Sep 21:01 SLST · shaded: usually, this time of year 0.90–1.31 m, median 1.04 (n=132) <0%Alert<0%Minor<0%Major chance of reaching each level within 24h · from 703 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.
	0.54 m	5	Normal	0.2% Alert · n=657
0.54m 21:07 SLST · hourly feed → steady · +0.00 in 24h 4.46 m below Alert · higher than 3.6% of its history Alert 5Minor 6Major 7.5 19 Sep 22:02 → 24 Sep 21:07 SLST · shaded: usually, this time of year 0.53–0.85 m, median 0.58 (n=132) 0.2%Alert<0%Minor<0%Major chance of reaching each level within 24h · from 657 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 0.54 is 7% 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=642
0.41m 21:01 SLST · hourly feed → steady · +0.00 in 24h 3.59 m below Alert · higher than 14.6% of its history Alert 4Minor 5Major 6 19 Sep 22:01 → 24 Sep 21:01 SLST · shaded: usually, this time of year 0.36–0.41 m, median 0.40 (n=105) 0.5%Alert0.5%Minor<0%Major chance of reaching each level within 24h · from 642 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.
	0.40 m	4.75	Normal	2.4% Alert · n=335
0.40m 21:03 SLST · hourly feed → steady · +0.02 in 24h 4.35 m below Alert · higher than 24.8% of its history Alert 4.75Minor 6Major 7 19 Sep 22:00 → 24 Sep 21:03 SLST · shaded: usually, this time of year -0.26–0.39 m, median -0.18 (n=62) 2.4%Alert<1%Minor<1%Major chance of reaching each level within 24h · from 335 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 0.40 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.
	0.41 m	5	Normal	<1% Alert · n=273
0.41m 18:04 SLST · hourly feed → steady · -0.01 in 24h 4.59 m below Alert · higher than 4.4% of its history Alert 5Minor 6.8Major 7.8 20 Sep 07:01 → 24 Sep 18:04 SLST · shaded: usually, this time of year 0.31–0.76 m, median 0.42 (n=95) <1%Alert<1%Minor<1%Major chance of reaching each level within 24h · from 273 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 0.41 is 4% 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.
	0.18 m	3	Normal	0.2% Alert · n=615
0.18m 21:02 SLST · hourly feed → steady · +0.00 in 24h 2.82 m below Alert · higher than 10.6% of its history Alert 3Minor 4Major 5 19 Sep 22:02 → 24 Sep 21:02 SLST · shaded: usually, this time of year 0.13–0.52 m, median 0.26 (n=124) 0.2%Alert<0%Minor<0%Major chance of reaching each level within 24h · from 615 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 0.18 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.
	0.15 m	4.5	Normal	<0% Alert · n=667
0.15m 21:04 SLST · hourly feed → steady · +0.01 in 24h 4.35 m below Alert · higher than 4.8% of its history Alert 4.5Minor 6Major 7 19 Sep 22:03 → 24 Sep 21:04 SLST · shaded: usually, this time of year 0.13–0.37 m, median 0.15 (n=132) <0%Alert<0%Minor<0%Major chance of reaching each level within 24h · from 667 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 0.15 is 3% 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.
	0.04 m ▼	4	Normal	0.3% Alert · n=649
0.04m 21:04 SLST · hourly feed ▼ 0.01 m/h · -0.02 in 24h 3.96 m below Alert · higher than 3.1% of its history Alert 4Minor 4.5Major 6 19 Sep 22:04 → 24 Sep 21:04 SLST · shaded: usually, this time of year 0.06–0.26 m, median 0.10 (n=124) 0.3%Alert0.3%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 6.65 m on 27 Nov 2025, 18:30 SLST — 1.7× Alert, 1.1× Major. Today's 0.04 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.
	0.02 m	4.84	Normal	<1% Alert · n=224
0.02m 18:02 SLST · hourly feed → steady · -0.01 in 24h 4.82 m below Alert · higher than 14.8% of its history Alert 4.84Minor 5.94Major 8 20 Sep 07:09 → 24 Sep 18:02 SLST · shaded: usually, this time of year -0.11–0.22 m, median -0.03 (n=107) <1%Alert<1%Minor<1%Major chance of reaching each level within 24h · from 224 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 0.02 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 21:04 SLST · hourly feed → steady · +0.01 in 24h 4.25 m below Alert · higher than 14% of its history Alert 4Minor 4.6Major 6.5 19 Sep 22:03 → 24 Sep 21:04 SLST · shaded: usually, this time of year -0.33–-0.23 m, median -0.27 (n=101) 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.
	-0.29 m ▼	3	Normal	—
-0.29m 21:02 SLST · hourly feed ▼ 0.01 m/h · -0.03 in 24h 3.29 m below Alert · higher than 17.8% of its history Alert 3Minor 4.3Major 6 19 Sep 22:01 → 24 Sep 21:02 SLST · shaded: usually, this time of year -1.40–0.00 m, median -0.26 (n=132) 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 -0.29 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.
	-3.16 m	5	Normal	—
-3.16m 18:00 SLST · hourly feed → steady · -0.02 in 24h 8.16 m below Alert · higher than 13.1% of its history Alert 5Minor 6Major 8 20 Sep 06:02 → 24 Sep 18:00 SLST · shaded: usually, this time of year -3.15–-2.47 m, median -2.99 (n=110) 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 -3.16 is -40% 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