The system in six readings April delivered.
April delivered.
And May is bringing more.
What just fell, what just left the tap, and what the sky is bringing next — read in pairs, as cause and effect.
01 Supply — What came in
01 Rainfall · April · 3 stations
Twice the usual
April rain.
2.0× normal
Theewaterskloof 81mm · 1.5×
Voëlvlei 90mm · 2.2×
Wemmershoek 157mm · 2.3×
Verdict Much wetter than normal — close to twice the typical April.
02 Storage · 6 dams combined
The dams felt it —
up 2.6 points.
47% was 45% last week
Verdict Rising, but still inside the caution band.
02 Demand — What went out
03 Daily demand · vs target
The city is using
less than it should.
892Mℓ 83 Mℓ under target
Verdict 9% below the daily target — the kind of week that buys headroom.
04 Per person · ℓ/day · 12-mo avg
8 litres less,
per Capetonian.
152ℓ/day −8 ℓ vs trailing avg
Trailing 12-month average
Verdict A small but real saving — sustained, this is what shaves a percentage point off summer drawdown.
03 Forecast — What's coming next
05 Forecast · 7 days · 6 catchments
4 times a typical
week of rain.
4.0× normal
Verdict Wed looks like the wettest day.
06 Where it lands · per catchment
Each dam, and
what's coming for it.
5.1× a typical week
Theewaterskloof 47%
+40mm 3.0× normal
Voëlvlei 50%
+32mm 8.8× normal
Berg River 46%
+61mm 5.7× normal
Wemmershoek 50%
+55mm 5.5× normal
Steenbras Upper 57%
+57mm 3.9× normal
Steenbras Lower 37%
+69mm 3.7× normal
Verdict Steenbras Lower (37% full) and Berg River (46% full) get the biggest soaking.
