The week of September 27–October 4 on AAA’s reservoir charts: Carraízo up 11 cm, La Plata down 60 cm. The numbers first, then what they add up to.
Where the reservoirs stand
16 of 19 reservoirs sit in the Safe band (Seguridad) or above, 2 in the Watch band (Observación); La Plata is in the Adjustments band (Ajustes). Since August 7, Carraízo (Adjustments → Safe), Cidra (Adjustments → Watch), Río Blanco (Watch → Safe), Matrullas (Watch → Safe), Guayabal (Watch → Safe) have moved up a band; La Plata (Watch → Adjustments), Guineo (Spilling → Safe) have slipped down. The biggest move since Sep 27 is Guineo, down 121 cm to 901.00 m.
Reservoir by reservoir
Carraízo
- Sep 27 → Oct 4
- 40.63 → 40.74 mSafe band today
- Net change
- +11 cm1.6 cm a day on average
- Best morning
- +13 cmOct 2
- Worst morning
- −5 cmSep 28
- Rain nearby, last 7 days
- 2.31 inmost on Oct 1 (1.45 in)
- Above the Watch line
- 1.04 mrising — Spilling line ≈ 8 days up
La Plata
- Sep 27 → Oct 4
- 44.39 → 43.79 mAdjustments band today
- Net change
- −60 cm8.6 cm a day on average
- Worst morning
- −9 cmSep 29
- Rain nearby, last 7 days
- 0.76 inmost on Sep 30 (0.5 in)
- Above the Control line
- 3.29 m≈ 38 days at this week's pace
Cidra
- Sep 27 → Oct 4
- 400.52 → 400.53 mWatch band today
- Net change
- +1 cm0.1 cm a day on average
- Best morning
- +2 cmSep 30
- Worst morning
- −1 cmSep 29
- Rain nearby, last 7 days
- 2.5 inmost on Oct 1 (0.89 in)
- Above the Adjustments line
- 0.30 mholding
Carraízo, this week
Carraízo, morning by morning — tap a day for that day's Daily Water Watch
- Sep 2740.63−4 cm
- Sep 2840.58−5 cm
- Sep 2940.53−5 cm
- Sep 3040.51−2 cm
- Oct 140.47−4 cm
- Oct 240.60+13 cm
- Oct 3—no chart
- Oct 440.74+14 cm over 2 days
Teal = up from the previous reading, coral = down; a bold border marks a move of 20 cm or more. A day with no chart is grey, and the next day's move covers both.
Three reservoirs, one scale
What it adds up to
The week’s big change came at Carraízo. After 1.45 in of rain on October 1, it gained 13 cm the next morning, then 14 cm more by October 4 (AAA posted no chart on October 3), and now sits in the Safe band (Seguridad), moving toward the Spilling line (Desborde) at 40.95 m. That is a rise from rain, not a settled recovery: the rain that fell the day before (0.53 in) was followed by a 4 cm drop.
The rain did little for the other two. La Plata took 0.50 in on September 30 and fell 9 cm the next morning; it has dropped 11 mornings running and is still losing ground faster each week, sliding through the Adjustments band (Ajustes) toward the Control line. Cidra barely moved. Its rain produced 2 cm, 1 cm and 0 cm, and it sits in the Watch band (Observación), 0.30 m above the Adjustments line. The 38-day projection for La Plata is arithmetic at its latest weekly pace, not a forecast.
Each reservoir against its own next band line
Show the numbers
- Sep 27, 40.63 m, Safe
- Sep 28, 40.58 m, −5 cm, Safe
- Sep 29, 40.53 m, −5 cm, Safe
- Sep 30, 40.51 m, −2 cm, Safe
- Oct 1, 40.47 m, −4 cm, Safe
- Oct 2, 40.60 m, +13 cm, Safe
- Oct 4, 40.74 m, +14 cm, Safe
Show the numbers
- Sep 27, 44.39 m, Adjustments
- Sep 28, 44.31 m, −8 cm, Adjustments
- Sep 29, 44.22 m, −9 cm, Adjustments
- Sep 30, 44.13 m, −9 cm, Adjustments
- Oct 1, 44.04 m, −9 cm, Adjustments
- Oct 2, 43.96 m, −8 cm, Adjustments
- Oct 4, 43.79 m, −17 cm, Adjustments
Show the numbers
- Sep 27, 400.52 m, Watch
- Sep 28, 400.52 m, +0 cm, Watch
- Sep 29, 400.51 m, −1 cm, Watch
- Sep 30, 400.53 m, +2 cm, Watch
- Oct 1, 400.54 m, +1 cm, Watch
- Oct 2, 400.54 m, +0 cm, Watch
- Oct 4, 400.53 m, −1 cm, Watch
This week's 5 Daily Water Watches
- Oct 2 — AAA Changes the Rationing Plan, Oct 2
- Oct 1 — Toa Vaca Enters the Observación Band
- Sep 30 — La Plata at 44.13 Meters
- Sep 29 — Carraízo at 40.53 Meters
- Sep 28 — Carraízo at 40.58 Meters
Levels: AAA’s daily reservoir chart, Sep 27 – Oct 4. Rain: USGS gauges within 12 km of each reservoir. Rates and dates are arithmetic, not forecasts. How we report.