Flood
Event of November 11 to 15, 2004 in
Flooding
and landslides affected a significant portion of northern, central and
northeast
A
persistent upper trough to the west of Puerto Rico and an extremely moist low
level air mass (nearly saturated from 600 mb to the
surface) shifted slightly westward to encompass Puerto Rico early on the 12th, bringing widespread shower activity.� By 1200 UTC on the 12th rainfall was already fairly impressive, with 2.73� at
Represa de Comerio (CMRP4); 2.66� at Aguas Buenas (BZBP4),�� 2.59� at Rio Canas
and 2.40� at Naranjito (NAMP4), along with numerous 1 to 2 inch rains over the
northeast quarter of
�The activity continued to be widespread and
intense on the 13th
as a Flash Flood Warning was issued toward mid-morning for 14 northeast
municipalities from Fajardo southwest to Gurabo and Juncos.� Reports of flash flooding became more
numerous throughout the day and another Flash Flood Warning was issued for 7
municipalities in the central mountains in the afternoon.� This warning was extended into the evening as
moderate to heavy rainfall persisted across the same area.� Numerous landslides were also reported at this
time, especially in Cayey, Aguas Buenas and Naranjito.� Bridges were reported overtopped, collapsed
or washed out in several locations, including Naranjito, Orocovis, Morovis,
Aguas Buenas, Cidra, and Utuado.� Another
Flash Flood Warning was issued for Dorado and Toa Baja, primarily in the highly
saturated
Flood
Warnings along the Rio Cibuco, Rio de La Plata, Rio
Grande de Manati and Rio Grande de Arecibo continued into the 15th, as the strong onshore flow continued to restrict outflow
of these rivers into the
�����������������������������������
Table 1. Top Twenty-five
Stations: 24-hour rainfall and 4-day storm total ending at 1200 UTC:
Station Name (NWS ID) |
Nov 12 |
Nov 13 |
Nov 14 |
Nov
15 |
Total |
Rio Icacos nr
Naguabo (NGIP4) |
2.23 |
4.63 |
6.12 |
4.24 |
17.22 |
Lago Icacos at Damsite (LICP4) |
1.84 |
4.47 |
5.37 |
3.97 |
15.65 |
Boca Grande
nr Jayuya (JACP4) |
1.67 |
6.41 |
3.25 |
3.33 |
14.66 |
Represa De
Comerio (CMRP4) |
2.73 |
4.62 |
5.55 |
1.51 |
14.41 |
R. De La
Plata - Comerio (COMP4) |
1.82 |
5.47 |
4.88 |
1.15 |
13.32 |
Bairoa Arriba
RG (BZBP4) |
2.66 |
5.49 |
3.71 |
0.81 |
12.67 |
R. Guadiana
nr Naranjito (NMAP4) |
2.40 |
4.63 |
3.93 |
1.68 |
12.64 |
Aibonito Coop
(ALPP4) |
1.20 |
4.20 |
5.80 |
1.03 |
12.23 |
Rio Bauta �
Orocovis (BAUP4) |
1.05 |
6.15 |
3.15 |
1.84 |
12.19 |
Bo. Mamays Ab.
nr Jayuya (JABP4) |
1.28 |
4.93 |
2.59 |
2.42 |
11.22 |
R. Limon ab. L.
Dos Bocas (ARHP4) |
1.23 |
3.89 |
3.13 |
2.89 |
11.14 |
Bo. Saliente nr Jayuya (JAZP4) |
0.96 |
4.50 |
3.08 |
2.46 |
11.00 |
Bo. Fronton
nr Ciales (CIBP4) |
1.08 |
4.79 |
2.67 |
2.31 |
10.85 |
R. Caonillas
at Paso Palma (JAXP4) |
0.85 |
5.43 |
2.40 |
2.16 |
10.84 |
|
0.72 |
4.99 |
2.55 |
2.18 |
10.44 |
Rio |
0.51 |
4.11 |
4.57 |
0.76 |
9.95 |
Gurabo Abajo RG (GARP4) |
1.10 |
4.58 |
2.97 |
1.23 |
9.88 |
Bo. Beatriz RG (BZDP4) |
0.50 |
4.19 |
4.32 |
0.85 |
9.86 |
Rio Jauca at
Paso Palma (JAPP4) |
0.55 |
5.62 |
1.81 |
1.44 |
9.42 |
Canaboncito
RG (CAHP4) |
0.85 |
3.61 |
4.35 |
0.36 |
9.17 |
Adjuntas 2 NW
(ADKP4) |
1.22 |
3.73 |
2.07 |
2.03 |
9.05 |
R. Gde. De
Arec. � Utuado (UTXP4) |
1.91 |
2.67 |
2.33 |
2.11 |
9.02 |
Rio Turabo
abv Borinquen (CAKP4) |
0.40 |
4.91 |
2.55 |
1.07 |
8.93 |
Bo. Consejo
nr Adjuntas (ADNP4) |
1.21 |
4.45 |
1.81 |
1.34 |
8.81 |
|
1.23 |
4.51 |
1.78 |
1.23 |
8.75 |
River
flooding from this event was significant but quite ordinary by