The week of September 6–September 13 on AAA’s reservoir charts: Carraízo up 20 cm, La Plata down 26 cm. The numbers first, then what they add up to.
At a glance
Carraízo
- Sep 6 → Sep 13
- 38.94 → 39.14 mobservación band today
- Net change
- +20 cm2.9 cm a day on average
- Best morning
- +19 cmSep 9
- Worst morning
- −7 cmSep 7
- Rain nearby, last 7 days
- 1.82 inmost on Sep 7 (0.95 in)
- Above the ajustes line
- 0.64 mrising — seguridad line ≈ 12 days up
La Plata
- Sep 6 → Sep 13
- 44.52 → 44.26 majustes band today
- Net change
- −26 cm3.7 cm a day on average
- Best morning
- +11 cmSep 12
- Worst morning
- −10 cmSep 11
- Rain nearby, last 7 days
- 1.63 inmost on Sep 9 (0.55 in)
- Above the control line
- 3.76 m≈ 114 days at this week's pace
Cidra
- Sep 6 → Sep 13
- 400.16 → 400.26 mobservación band today
- Net change
- +10 cm1.4 cm a day on average
- Best morning
- +5 cmSep 11
- Worst morning
- −1 cmSep 13
- Rain nearby, last 7 days
- 4.52 inmost on Sep 10 (1.57 in)
- Above the ajustes line
- 0.03 mrising — seguridad line ≈ 85 days up
Carraízo, this week
Carraízo, morning by morning · tap a day for that chart check
- Sep 638.94−7 cm
- Sep 738.87−7 cm
- Sep 838.83−4 cm
- Sep 939.02+19 cm
- Sep 1039.07+5 cm
- Sep 1139.20+13 cm
- Sep 1239.19−1 cm
- Sep 1339.14−5 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
Carraízo gained the most ground this week, climbing 20 cm to 39.14 m in the observación band on the back of a single 19 cm jump September 9, but that gain has already lost momentum — the 7-day pace has slowed from 30 cm a day the previous week to 4.5 cm a day now, and the reservoir has fallen for the last two mornings. Cidra also ended higher, up 10 cm to 400.26 m, still in observación and sitting just 0.03 m above the ajustes line below it; four straight days of rain, capped by 1.57 in on September 10, kept pushing it up before it ticked down 1 cm on the final morning.
La Plata is the one still sliding: down 26 cm on the week to 44.26 m in the ajustes band, and falling faster than it was the week before despite 1.63 in of rain, which only slowed rather than reversed the drop. It remains 3.76 m above the control line, and at the current rate a projection — arithmetic, not a forecast — puts that line about 114 days out.
Each reservoir against its own next band line
All 8 daily chart checks this week
- Sep 13 — Carraízo at 39.14 Meters
- Sep 12 — La Plata Rises to 44.25 Meters
- Sep 11 — Cidra Back in the Observación Band
- Sep 10 — Carraízo Rises to 39.07 Meters
- Sep 9 — Carraízo Rises to 39.02 Meters
- Sep 8 — Carraízo at 38.83 Meters
- Sep 7 — Carraízo at 38.87 Meters
- Sep 6 — Carraízo at 38.94 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.