Mahaweli flood watch

Station	Level	Alert		Next level, 24h
	6.64 m ▼	5	Minor floodMinor	2.4% Major · n=336
6.64m 01:03 SLST · hourly feed ▼ 0.01 m/h · +1.91 in 24h 1.64 m above Alert · higher than 94.3% of its history Alert 5Minor 6Major 7.5 20 Sep 02:02 → 25 Sep 01:03 SLST · shaded: usually, this time of year 3.64–6.85 m, median 5.78 (n=294) 91.7%Alert35.4%Minor2.4%Major chance of reaching each level within 24h · from 336 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 6.64 is 119% 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.
	4.58 m ▲	3.5	Minor floodMinor	10.5% Major · n=429
4.58m 01:06 SLST · hourly feed ▲ 0.02 m/h · +0.81 in 24h 1.08 m above Alert · higher than 94.8% of its history Alert 3.5Minor 4Major 5 20 Sep 02:08 → 25 Sep 01:06 SLST · shaded: usually, this time of year 2.52–4.86 m, median 4.12 (n=293) 97.7%Alert69.7%Minor10.5%Major chance of reaching each level within 24h · from 429 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 4.58 is 126% 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.
	1.76 m ▲	1.4	Minor floodMinor	4.8% Major · n=543
1.76m 01:08 SLST · hourly feed ▲ 0.02 m/h · +0.42 in 24h 0.36 m above Alert · higher than 80.8% of its history Alert 1.4Minor 1.7Major 2.8 20 Sep 02:20 → 25 Sep 01:08 SLST · shaded: usually, this time of year 0.47–2.68 m, median 1.71 (n=191) 98.9%Alert62.8%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 1.76 is 104% 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.
	5.02 m ▼	4	Alert	5.6% Minor · n=90
5.02m 01:00 SLST · hourly feed ▼ 0.03 m/h · +1.12 in 24h 1.02 m above Alert · higher than 89.6% of its history Alert 4Minor 6Major 7.5 20 Sep 02:00 → 25 Sep 01:00 SLST · shaded: usually, this time of year 2.29–5.25 m, median 4.02 (n=190) 95.6%Alert5.6%Minor<3%Major chance of reaching each level within 24h · from 90 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 5.02 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.
	6.45 m	5.2	Alert	28.1% Minor · n=32
6.45m 01:05 SLST · hourly feed → steady · +2.12 in 24h 1.25 m above Alert · higher than 93.9% of its history Alert 5.2Minor 7.5Major 9.5 20 Sep 02:09 → 25 Sep 01:05 SLST · shaded: usually, this time of year 1.45–5.99 m, median 3.71 (n=283) 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 6.45 is 64% 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.
	4.53 m ▼	4	Alert	13.7% Minor · n=51
4.53m 01:04 SLST · hourly feed ▼ 0.25 m/h · +0.39 in 24h 0.53 m above Alert · higher than 95.8% of its history Alert 4Minor 6Major 7.5 20 Sep 02:02 → 25 Sep 01:04 SLST · shaded: usually, this time of year 1.90–4.21 m, median 2.80 (n=283) 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 4.53 is 110% 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.
	1.57 m ▲	1.5	Alert	11.1% Minor · n=117
1.57m 01:08 SLST · hourly feed ▲ 0.02 m/h · +0.51 in 24h 0.07 m above Alert · higher than 96.2% of its history Alert 1.5Minor 3Major 4.5 20 Sep 02:27 → 25 Sep 01:08 SLST · shaded: usually, this time of year 0.65–1.20 m, median 0.90 (n=251) 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 1.57 is 44% 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

6.64 m ▼

Minor floodMinor

2.4% Major · n=336

4.58 m ▲

3.5

Minor floodMinor

10.5% Major · n=429

1.76 m ▲

1.4

Minor floodMinor

4.8% Major · n=543

5.02 m ▼

Alert

5.6% Minor · n=90

6.45 m

5.2

Alert

28.1% Minor · n=32

4.53 m ▼

Alert

13.7% Minor · n=51

1.57 m ▲

1.5

Alert

11.1% Minor · n=117

Station	Level	Alert		Next level, 24h
	14.75 m ▲	15	Normal	4.3% Alert · n=93
14.75m 01:03 SLST · hourly feed ▲ 0.07 m/h · Alert in ~4h at this rate · +2.01 in 24h 0.25 m below Alert · higher than 92.9% of its history Alert 15Minor 15.5Major 19 20 Sep 02:04 → 25 Sep 01:03 SLST · shaded: usually, this time of year 9.91–13.50 m, median 11.76 (n=251) 4.3%Alert3.2%Minor<3%Major chance of reaching each level within 24h · from 93 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 14.75 is 67% 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.
	3.24 m	3.3	Normal	43.2% Alert · n=37
3.24m 01:02 SLST · hourly feed → steady · +0.80 in 24h 0.06 m below Alert · higher than 63.2% of its history Alert 3.3Minor 4.4Major 5.5 20 Sep 02:07 → 25 Sep 01:02 SLST · shaded: usually, this time of year 1.26–4.63 m, median 3.36 (n=259) 43.2%Alert13.5%Minor<8%Major chance of reaching each level within 24h · from 37 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 3.24 is 46% 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.
	6.02 m ▲	6.5	Normal	10.6% Alert · n=47
6.02m 01:06 SLST · hourly feed ▲ 0.06 m/h · Alert in ~8h at this rate · +1.42 in 24h 0.48 m below Alert · higher than 85.4% of its history Alert 6.5Minor 7.5Major 9.5 20 Sep 02:13 → 25 Sep 01:06 SLST · shaded: usually, this time of year 1.80–5.88 m, median 4.43 (n=251) 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 6.02 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.
	2.70 m ▼	3	Normal	28.9% Alert · n=38
2.70m 01:05 SLST · hourly feed ▼ 0.23 m/h · +0.25 in 24h 0.30 m below Alert · higher than 96.6% of its history Alert 3Minor 4Major 6 20 Sep 02:02 → 25 Sep 01:05 SLST · shaded: usually, this time of year 1.65–2.20 m, median 1.86 (n=243) 28.9%Alert2.6%Minor2.6%Major chance of reaching each level within 24h · from 38 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 2.70 is 42% 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.
	2.68 m	3	Normal	6.6% Alert · n=229
2.68m 01:02 SLST · hourly feed → steady · -0.02 in 24h 0.32 m below Alert · higher than 69.1% of its history Alert 3Minor 4Major 5 20 Sep 02:02 → 25 Sep 01:02 SLST · shaded: usually, this time of year 1.03–3.80 m, median 2.84 (n=293) 6.6%Alert<1%Minor<1%Major chance of reaching each level within 24h · from 229 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 2.68 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.
	8.46 m ▲	10	Normal	23.3% Alert · n=180
8.46m 00:02 SLST · hourly feed ▲ 0.05 m/h · Alert in ~31h at this rate · +0.66 in 24h 1.54 m below Alert · higher than 69.4% of its history Alert 10Minor 10.7Major 12.2 20 Sep 02:05 → 25 Sep 00:02 SLST · shaded: usually, this time of year 5.57–9.69 m, median 8.03 (n=291) 23.3%Alert2.2%Minor0.6%Major chance of reaching each level within 24h · from 180 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 8.46 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 ft ▲	4	Normal	25.6% Alert · n=43
3.20ft 01:13 SLST · hourly feed ▲ 0.08 ft/h · Alert in ~10h at this rate · +0.50 in 24h 0.80 ft below Alert · higher than 81.6% of its history Alert 4Minor 5Major 7 20 Sep 02:07 → 25 Sep 01:13 SLST · shaded: usually, this time of year 1.00–3.50 ft, median 2.50 (n=242) 25.6%Alert4.7%Minor<7%Major chance of reaching each level within 24h · from 43 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 3.20 is 38% 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.
	2.87 m ▼	4	Normal	5% Alert · n=80
2.87m 00:13 SLST · hourly feed ▼ 0.11 m/h · +0.89 in 24h 1.13 m below Alert · higher than 94.1% of its history Alert 4Minor 5Major 6.5 20 Sep 02:01 → 25 Sep 00:13 SLST · shaded: usually, this time of year 0.72–3.09 m, median 1.95 (n=293) 5%Alert3.8%Minor<4%Major chance of reaching each level within 24h · from 80 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 2.87 is 104% 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.
	3.34 m ▲	5	Normal	13.3% Alert · n=75
3.34m 01:07 SLST · hourly feed ▲ 0.05 m/h · Alert in ~34h at this rate · +0.76 in 24h 1.66 m below Alert · higher than 66.9% of its history Alert 5Minor 6.2Major 9.6 20 Sep 02:04 → 25 Sep 01:07 SLST · shaded: usually, this time of year 1.74–3.53 m, median 2.89 (n=219) 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 3.34 is 25% 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.
	1.52 m ▼	2.5	Normal	6.7% Alert · n=60
1.52m 01:06 SLST · hourly feed ▼ 0.07 m/h · -0.93 in 24h 0.98 m below Alert · higher than 89.8% of its history Alert 2.5Minor 4Major 6 20 Sep 02:17 → 25 Sep 01:06 SLST · shaded: usually, this time of year 0.21–1.87 m, median 1.11 (n=291) 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 1.52 is 51% 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.
	1.66 m ▼	3	Normal	5.8% Alert · n=208
1.66m 01:09 SLST · hourly feed ▼ 0.11 m/h · -0.09 in 24h 1.34 m below Alert · higher than 84.6% of its history Alert 3Minor 4Major 6 20 Sep 02:06 → 25 Sep 01:09 SLST · shaded: usually, this time of year 0.44–1.74 m, median 1.05 (n=251) 5.8%Alert4.3%Minor0.5%Major chance of reaching each level within 24h · from 208 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 1.66 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.
	2.49 m ▼	4.8	Normal	5.1% Alert · n=99
2.49m 01:02 SLST · hourly feed ▼ 0.27 m/h · +0.62 in 24h 2.31 m below Alert · higher than 93.6% of its history Alert 4.8Minor 5.8Major 7 20 Sep 02:04 → 25 Sep 01:02 SLST · shaded: usually, this time of year 0.79–2.30 m, median 1.46 (n=250) 5.1%Alert3%Minor2%Major chance of reaching each level within 24h · from 99 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 2.49 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.
	1.35 m ▼	3	Normal	1.1% Alert · n=91
1.35m 01:00 SLST · hourly feed ▼ 0.01 m/h · +0.50 in 24h 1.65 m below Alert · higher than 78.9% of its history Alert 3Minor 5Major 7 20 Sep 02:01 → 25 Sep 01:00 SLST · shaded: usually, this time of year 0.55–1.03 m, median 0.75 (n=103) 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 1.35 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.
	2.31 m ▼	5.5	Normal	<4% Alert · n=67
2.31m 01:04 SLST · hourly feed ▼ 0.02 m/h · +0.92 in 24h 3.19 m below Alert · higher than 70.4% of its history Alert 5.5Minor 6.5Major 7.5 20 Sep 02:01 → 25 Sep 01:04 SLST · shaded: usually, this time of year 0.88–2.43 m, median 1.67 (n=213) <4%Alert<4%Minor<4%Major chance of reaching each level within 24h · from 67 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 2.31 is 18% 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.
	1.11 m	4	Normal	0.2% Alert · n=575
1.11m 01:02 SLST · hourly feed → steady · +0.00 in 24h 2.89 m below Alert · higher than 63.8% of its history Alert 4Minor 5Major 5.5 20 Sep 02:06 → 25 Sep 01:02 SLST · shaded: usually, this time of year -0.21–1.13 m, median 0.41 (n=123) 0.2%Alert0.2%Minor<1%Major chance of reaching each level within 24h · from 575 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 1.11 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=532
1.64m 00:05 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 20 Sep 04:02 → 25 Sep 00:05 SLST · shaded: usually, this time of year 1.20–1.82 m, median 1.52 (n=124) <1%Alert<1%Minor<1%Major chance of reaching each level within 24h · from 532 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.
	1.02 m ▲	4.4	Normal	<0% Alert · n=679
1.02m 01:04 SLST · hourly feed ▲ 0.01 m/h · +0.08 in 24h 3.38 m below Alert · higher than 63.2% of its history Alert 4.4Minor 5.4Major 5.9 20 Sep 02:34 → 25 Sep 01:04 SLST · shaded: usually, this time of year 0.42–1.06 m, median 0.67 (n=133) <0%Alert<0%Minor<0%Major chance of reaching each level within 24h · from 679 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.
	1.01 m	6.9	Normal	<0% Alert · n=704
1.01m 01:01 SLST · hourly feed → steady · +0.01 in 24h 5.89 m below Alert · higher than 11.2% of its history Alert 6.9Minor 8.4Major 8.8 20 Sep 02:05 → 25 Sep 01:01 SLST · shaded: usually, this time of year 0.90–1.31 m, median 1.04 (n=133) <0%Alert<0%Minor<0%Major chance of reaching each level within 24h · from 704 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=658
0.54m 01:16 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 20 Sep 02:56 → 25 Sep 01:16 SLST · shaded: usually, this time of year 0.53–0.85 m, median 0.58 (n=133) 0.2%Alert<0%Minor<0%Major chance of reaching each level within 24h · from 658 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=643
0.41m 01:01 SLST · hourly feed → steady · +0.00 in 24h 3.59 m below Alert · higher than 14.7% of its history Alert 4Minor 5Major 6 20 Sep 02:01 → 25 Sep 01:01 SLST · shaded: usually, this time of year 0.36–0.41 m, median 0.40 (n=106) 0.5%Alert0.5%Minor<0%Major chance of reaching each level within 24h · from 643 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.
	0.41 m ▲	4.75	Normal	2.4% Alert · n=336
0.41m 01:02 SLST · hourly feed ▲ 0.01 m/h · +0.02 in 24h 4.34 m below Alert · higher than 24.8% of its history Alert 4.75Minor 6Major 7 20 Sep 02:01 → 25 Sep 01:02 SLST · shaded: usually, this time of year -0.26–0.39 m, median -0.15 (n=63) 2.4%Alert<1%Minor<1%Major chance of reaching each level within 24h · from 336 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 0.41 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.
	0.12 m ▼	3	Normal	0.2% Alert · n=616
0.12m 01:06 SLST · hourly feed ▼ 0.02 m/h · -0.07 in 24h 2.88 m below Alert · higher than 4.1% of its history Alert 3Minor 4Major 5 20 Sep 02:11 → 25 Sep 01:06 SLST · shaded: usually, this time of year 0.13–0.52 m, median 0.26 (n=125) 0.2%Alert<0%Minor<0%Major chance of reaching each level within 24h · from 616 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 0.12 is 3% 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=668
0.15m 01:02 SLST · hourly feed → steady · +0.01 in 24h 4.35 m below Alert · higher than 4.9% of its history Alert 4.5Minor 6Major 7 20 Sep 02:11 → 25 Sep 01:02 SLST · shaded: usually, this time of year 0.13–0.37 m, median 0.15 (n=133) <0%Alert<0%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 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.
	0.03 m ▼	4	Normal	0.3% Alert · n=650
0.03m 01:01 SLST · hourly feed ▼ 0.01 m/h · -0.05 in 24h 3.97 m below Alert · higher than 2.2% of its history Alert 4Minor 4.5Major 6 20 Sep 02:03 → 25 Sep 01:01 SLST · shaded: usually, this time of year 0.05–0.26 m, median 0.10 (n=125) 0.3%Alert0.3%Minor<0%Major chance of reaching each level within 24h · from 650 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.
	-0.25 m	4	Normal	—
-0.25m 01:03 SLST · hourly feed → steady · +0.00 in 24h 4.25 m below Alert · higher than 14.1% of its history Alert 4Minor 4.6Major 6.5 20 Sep 02:02 → 25 Sep 01:03 SLST · shaded: usually, this time of year -0.33–-0.23 m, median -0.27 (n=102) 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 01:01 SLST · hourly feed → steady · -0.03 in 24h 3.29 m below Alert · higher than 17.8% of its history Alert 3Minor 4.3Major 6 20 Sep 02:05 → 25 Sep 01:01 SLST · shaded: usually, this time of year -1.40–0.00 m, median -0.26 (n=133) 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.

Peradeniya

Nawalapitiya

Closest to their thresholds