The week of August 30–September 6 on AAA’s reservoir charts: Carraízo up 187 cm, La Plata down 20 cm. The numbers first, then what they add up to.
At a glance
Carraízo
- Aug 30 → Sep 6
- 37.07 → 38.94 mobservación band today
- Net change
- +187 cm26.7 cm a day on average
- Best morning
- +172 cmSep 2
- Worst morning
- −8 cmSep 5
- Rain nearby, last 7 days
- 1.86 inmost on Sep 1 (1.14 in)
- Above the ajustes line
- 0.44 mrising — seguridad line ≈ 3 days up
La Plata
- Aug 30 → Sep 6
- 44.72 → 44.52 majustes band today
- Net change
- −20 cm2.9 cm a day on average
- Worst morning
- −8 cmSep 1
- Rain nearby, last 7 days
- 0.57 inmost on Sep 1 (0.35 in)
- Above the control line
- 4.02 m≈ 161 days at this week's pace
Cidra
- Aug 30 → Sep 6
- 400.02 → 400.16 majustes band today
- Net change
- +14 cm2 cm a day on average
- Best morning
- +7 cmSep 1
- Worst morning
- −1 cmSep 6
- Rain nearby, last 7 days
- 4.47 inmost on Sep 1 (2.81 in)
- Above the control line
- 1.79 mrising — observacion line ≈ 4 days up
Carraízo, this week
Carraízo, morning by morning · tap a day for that chart check
- Aug 3037.07−7 cm
- Aug 3137.14+7 cm
- Sep 137.20+6 cm
- Sep 238.92+172 cm
- Sep 339.11+19 cm
- Sep 439.09−2 cm
- Sep 539.01−8 cm
- Sep 638.94−7 cm
Teal = up from the previous reading, coral = down; a bold border marks a move of 20 cm or more.
Three reservoirs, one scale
What it adds up to
The big mover this week was Carraízo, which jumped 187 cm to 38.94 m after a single storm — 1.14 in of rain on September 1 produced a 172 cm surge the next morning, dwarfing the rest of the week’s smaller ups and downs. That one burst is doing all the work: Carraízo now sits 0.44 m below the seguridad line, and if last week’s pace held, it would cross into that band in about 3 days. Cidra also inched up, closing at 400.16 m, 1.79 m above its control line, with the same rain event driving its two biggest gains before tapering off.
La Plata is the outlier: despite 0.57 in of rain, it kept slipping, ending the week down at 44.52 m, still in ajustes and 4.02 m above the control line. Its rate of decline eased from the prior week, but it did not turn around. At that slower pace, reaching control would take about 161 days — arithmetic, not a forecast. Rain helped Carraízo and Cidra; it barely touched La Plata’s trajectory.
Each reservoir against its own next band line
All 8 daily chart checks this week
- Sep 6 — Carraízo at 38.94 Meters
- Sep 5 — Carraízo at 39.01 Meters
- Sep 4 — Carraízo Steady at 39.09 Meters
- Sep 3 — Carraízo Rises to 39.11 Meters
- Sep 2 — Carraízo Back in the Observación Band
- Sep 1 — Carraízo Rises to 37.20 Meters
- Aug 31 — Carraízo Rises to 37.14 Meters
- Aug 30 — Carraízo at 37.07 Meters
Numbers from AAA’s Monitoreo Diario charts, read each morning for our reservoir board; rain from USGS gauges within 12 km of each reservoir (a proximity proxy, not a basin measurement). Rates and pace dates are arithmetic over the stored readings, not forecasts. The narrative is drafted by Claude from the computed figures and checked number-by-number against them before publishing.