Mahaweli flood watch

Peradeniya · Nawalapitiya · Kotmale reservoir — the upper Mahaweli

Updated
2026-09-24 15:30 SLST
0h ago

Unofficial. This page re-presents the Department of Meteorology / Disaster Management Centre's published river level reports; it is not issued by them and is not an official warning. Do not make an evacuation decision from this page. The official reports are at dmc.gov.lk, and the DMC emergency line in Sri Lanka is 117.

Peradeniya

Normal

4.22m

▼ 0.06 m/h · +1.42 in 24h

0.78 m below Alert · higher than 89.6% of its history

Alert 5Minor 7Major 9

19 Sep 00:30 → 24 Sep 15:30 SLST · shaded: usually, this time of year 1.55–3.86 m, median 2.40 (n=132)

28.6%Alert3.6%Minor2.4%Major

chance of reaching each level within 24h · from 84 past readings in this state (level only)

Nawalapitiya

Normal

2.77m

▼ 0.11 m/h · +0.36 in 24h

0.73 m below Alert · higher than 94.6% of its history

Alert 3.5Minor 5Major 6

19 Sep 00:30 → 24 Sep 15:30 SLST · shaded: usually, this time of year 1.05–2.53 m, median 1.43 (n=132)

1.8%Alert<5%Minor<5%Major

chance of reaching each level within 24h · from 55 past readings in this state (level + trend)

Kotmale reservoir 61% full (+4.0 pts vs previous report) · 690.82 m asl · 12.2 m below FSL 703.0 · read 2026-09-24

Trend chart appears once there are 5 daily readings — 3 so far. Capture began 2026-09-22; the source publishes once a day and keeps no history.

Closest to their thresholds

Station	Level	Alert		Next level, 24h
Panadugama	6.73 m ▲	5	Minor floodMinor	6.3% Major · n=268
Tawalama	5.32 m	4	Alert	18.5% Minor · n=135
Baddegama	4.40 m ▲	3.5	Minor floodMinor	16.3% Major · n=135
Magura	4.92 m ▲	4	Alert	15.5% Minor · n=110
Thalgahagoda	1.67 m ▲	1.4	Alert	71.4% Minor · n=49
Ratnapura	5.99 m ▲	5.2	Alert	15.7% Minor · n=343
Pitabeddara	4.21 m ▼	4	Alert	31% Minor · n=58

The other 29 stations in this report

Station	Level	Alert		Next level, 24h
Norwood	1.37 m ▲	1.5	Normal	19.6% Alert · n=102
Glencourse	13.68 m ▲	15	Normal	4.3% Alert · n=92
Putupaula	2.62 m ▲	3	Normal	6.6% Alert · n=228
Urawa	2.16 m ▼	2.5	Normal	10.9% Alert · n=46
Dunamale	2.80 m ▲	3.3	Normal	70% Alert · n=30
Kithulgala	2.41 m ▼	3	Normal	24.3% Alert · n=37
Ellagawa	8.03 m ▲	10	Normal	23.5% Alert · n=179
Hanwella	5.13 m ▲	6.5	Normal	3.8% Alert · n=52
N' Street	3.00 ft ▲	4	Normal	10.5% Alert · n=86
Holombuwa	2.04 m ▼	3	Normal	14.4% Alert · n=153
Badalgama	2.93 m ▲	5	Normal	2.4% Alert · n=42
Deraniyagala	2.38 m ▼	4.8	Normal	5.1% Alert · n=98
Moraketiya	1.45 m ▲	3	Normal	2.6% Alert · n=302
Giriulla	1.88 m ▲	5.5	Normal	1.5% Alert · n=65
Horowpothana	1.64 m	6	Normal	<1% Alert · n=531
Thanamalwila	1.09 m	4	Normal	0.2% Alert · n=574
Wellawaya	0.94 m ▲	4.4	Normal	<0% Alert · n=678
Kuda Oya	1.02 m	6.9	Normal	<0% Alert · n=703
Nakkala	0.54 m	5	Normal	0.2% Alert · n=657
Yaka Wewa	0.41 m	4	Normal	0.5% Alert · n=642
Moragaswewa	0.39 m	4.75	Normal	2.4% Alert · n=335
Thanthirimale	0.41 m	5	Normal	<1% Alert · n=273
Siyambalanduwa	0.15 m	4.5	Normal	<0% Alert · n=667
Thaldena	0.09 m ▼	3	Normal	0.2% Alert · n=615
Padiyathalawa	0.08 m	4	Normal	0.3% Alert · n=649
Galgamuwa	0.02 m	4.84	Normal	<1% Alert · n=224
Katharagama	-0.24 m	4	Normal	—
Manampitiya	-0.26 m ▼	3	Normal	—
Weraganthota	-3.15 m	5	Normal	—