Puerto Rico, 2001

Flash Flooding in Puerto Rico, November 7 to 9, 2001

November 7 to 9, 2001 · NWS SJU · 13 events in 13 counties and zones

S. Virgin Islands producing copious rainfall across the region.

The toll

Deaths
0
Injuries
0
Property damage
$75 million
Crop damage
$17 million
Events
13

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS SJU wrote it up.

A cold front became stationary on November 7 through November 9 across Puerto Rico and the U.S. Virgin Islands producing copious rainfall across the region. High seas and this excessive rainfall caused most of the rivers flowing to the north to go out of their banks flooding nearby areas and roads. The highest rainfall amounts in a 48 hour period were: 16.56 inches in Rio Piedras sector in San Juan, 16.07 inches in Naguabo, 14.26 inches in Morovis, 14.10 inches in Barranquitas, 13.52 inches in Bayamon, 12.63 inches in Canovanas and 12.60 inches in Orocovis. Flood damages were estimated at around $92 million. Of that total, 17 million occurred in the agriculture sector. The areas most affected were the north, central and east sections of Puerto Rico where considerable damage to electrical and water systems, highways and roads, bridges, privates homes, schools, small business and commerce were reported due to flooding, landslides and mudslides. In addition, nearly 300 people were in shelters.

What forecasters said that day

The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS San Juan, PR wrote its last area forecast discussion before the first event at Nov 7, 3:30 PM AST, 1 hour 30 minutes earlier.

Area forecast discussion, Nov 7, 3:30 PM AST, 1 hour 30 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN JUAN PR
330 PM AST WED NOV 07 2001

THE MID TO HIGH LEVEL FLOW BECOMES ZONAL AND REMAINS ZONAL
THROUGH 12Z ON THE 12TH OF NOV. THIS MEANS LITTLE MOVEMENT
OF THE FRONT/TROF NOW ALONG THE N COAST OF DR AND PR. THERE
IS AMPLE LIFTING OF THIS HIGHLY CHARGED MOIST BAND THROUGH
12 NOV AS VORT CENTERS PASS THROUGH W TO E TO PRODUCE EXTENSIVE
CLOUDS AND RAIN. SO THE FORECAST WILL HAVE HI SCT POPS
THROUGH THE WHOLE PACKAGE. I DO NOT SEE ANY REAL DRYING TAKING
PLACE. THERE WILL BE BREAKS IN THE CLOUDS ALLOWING FOR SOME
DIURNAL CONVECTION SO TSTMS WILL BE VERY ISOLATED. A FLASH
FLOOD WATCH IN EFFECT UNTIL 08/02Z. IT MAY HAVE TO BE EXTENDED.
I WILL NOT MAKE ANY CHANGES TO THE HEAVY SURF ADVISORY OR THE
COASTAL FLOOD WATCH. A COASTAL FLOOD WARNING MAY HAVE TO BE
ISSUED BEFORE THE HIGH TIDE AT 1:35 AM ALTHOUGH I FEEL THAT
IT MAY NOT BE NEEDED. THE HEAVY SURF ADVISORY WILL SERVE
ITS PURPOSE FOR NOW.

PLEASE REFER TO ZFP AND CWF FOR FORECAST DETAILS.

EQUIPMENT: NO PROBLEMS AT THIS TIME.

.SJU...
.PR...HSA AND CFA FOR NORTH...NORTHWEST AND WEST FACING COASTS OF
      PRZ001-002-005-008-010>013. SCA AMZ710-720-750 AND ALL
      PASSAGES OF AMZ730 AND 740. FFA ZONES 1, 2, 5, AND 8 TIL
      08/02Z.
.VI...HSA AND CFA NORTH AND NORTHWEST FACING COASTS OF VIZ001-002.
      SCA AMZ710-720 AND ALL PASSAGES OF AMZ70.

17

WRITTEN TEXT FORECASTS (IN ENGLISH OR SPANISH)...SATELLITE IMAGERY
...DOPPLER RADAR DATA...AND A VIRTUAL LIBRARY OF WEATHER INFORMATION
CAN BE FOUND AT THE NWS SAN JUAN WEB SITE AT:

HTTP://WWW.SRH.NOAA.GOV/SJU (ALL LOWER CASE).

Event by event

13 flash flood. Local standard time, as filed.

Flash Flood, Central Interior

When
November 7, 5:00 PM AST to November 9, 6:00 AM AST
Where
Central Interior County, Countywide
Property damage
$10 million
Crop damage
$4.0 million
Reported by
EMERGENCY MANAGER

Flash Flood, Culebra

When
November 7, 5:00 PM AST to November 9, 6:00 AM AST
Where
Culebra County, Countywide
Reported by
EMERGENCY MANAGER

Flash Flood, Eastern Interior

When
November 7, 5:00 PM AST to November 9, 6:00 AM AST
Where
Eastern Interior County, Countywide
Property damage
$8.0 million
Crop damage
$2.0 million
Reported by
EMERGENCY MANAGER

Flash Flood, Mayaguez and Vicinity

When
November 7, 5:00 PM AST to November 9, 6:00 AM AST
Where
Mayaguez and Vicinity County, Countywide
Property damage
$500,000
Reported by
EMERGENCY MANAGER

Flash Flood, North Central

When
November 7, 5:00 PM AST to November 9, 6:00 AM AST
Where
North Central County, Countywide
Property damage
$15 million
Crop damage
$5.0 million
Reported by
EMERGENCY MANAGER

Flash Flood, Northeast

When
November 7, 5:00 PM AST to November 9, 6:00 AM AST
Where
Northeast County, Countywide
Property damage
$5.0 million
Crop damage
$1.0 million
Reported by
EMERGENCY MANAGER

Flash Flood, Northwest

When
November 7, 5:00 PM AST to November 9, 6:00 AM AST
Where
Northwest County, Countywide
Property damage
$9.0 million
Crop damage
$1.0 million
Reported by
EMERGENCY MANAGER

Flash Flood, Ponce and Vicinity

When
November 7, 5:00 PM AST to November 9, 6:00 AM AST
Where
Ponce and Vicinity County, Countywide
Reported by
EMERGENCY MANAGER

Flash Flood, San Juan and Vicinity

When
November 7, 5:00 PM AST to November 9, 6:00 AM AST
Where
San Juan and Vicinity County, Countywide
Property damage
$9.0 million
Crop damage
$1.0 million
Reported by
EMERGENCY MANAGER

Flash Flood, Southeast

When
November 7, 5:00 PM AST to November 9, 6:00 AM AST
Where
Southeast County, Countywide
Property damage
$4.5 million
Crop damage
$1.0 million
Reported by
EMERGENCY MANAGER

Flash Flood, Southwest

When
November 7, 5:00 PM AST to November 9, 6:00 AM AST
Where
Southwest County, Countywide
Reported by
EMERGENCY MANAGER

Flash Flood, Vieques

When
November 7, 5:00 PM AST to November 9, 6:00 AM AST
Where
Vieques County, Countywide
Reported by
EMERGENCY MANAGER

Flash Flood, Western Interior

When
November 7, 5:00 PM AST to November 9, 6:00 AM AST
Where
Western Interior County, Countywide
Property damage
$14 million
Crop damage
$2.0 million
Reported by
EMERGENCY MANAGER

What these are

Flash Flood
Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Puerto Rico in 2001Every state in 2001This day in weather historyWarnings in Puerto Rico, November 2001

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 5272516, 5272517, 5272518, 5272519, 5272520, 5272754, 5272755, 5272756, 5272757, 5272758, 5272759, 5272760, 5272761.