Heavy Rain in Puerto Rico, May 10, 2004

Name: Heavy Rain in Puerto Rico, May 10, 2004
Start: 2004-05-10T03:40
End: 2004-05-10T05:10
Location: Puerto Rico

May 10, 2004 · NWS SJU · 1 event in 1 county or zone

1 heavy rain, as filed by the National Weather Service.

The toll

Deaths: 0
Injuries: 0
Property damage: None recorded
Crop damage: None recorded
Events: 1

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 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 May 9, 9:23 PM AST, 6 hours 17 minutes earlier.

Area forecast discussion, May 9, 9:23 PM AST, 6 hours 17 minutes before

PUERTO RICO AND U.S. VIRGIN ISLANDS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN JUAN PR
200 PM AST SUN MAY  9 2004

.DISCUSSION...I WILL ACCEPT THE GUIDANCE FROM AVN SINCE LAST FEW
DAYS IT HAVE DONE A VERY GOOD JOB. AT PRESENT TIME...THIS GUIDANCE
SUGGEST GOOD OMEGA VALUES ESPECIALLY IN THE AFTERNOON TODAY AND
MONDAY. A MOIST LOW LEVEL AIRMASS ASSOCIATED TO THE REMNANTS OF A
FRONTAL SYSTEM LINGERS OVER THE AREA. DRIER AIR UPSTREAM IS LIFTING
THE MOIST AIR OVER THE LOCAL AREA RESULTING IN SHOWER DEVELOPMENT.
BEGINNING TUESDAY THIS GUIDANCE SUGGESTS A THICK UPPER LEVELS CLOUD
VEIL WITH STRONG UPPER LEVEL DIVERGENCE THURSDAY. THESE CLOUDS WILL
INHIBIT OUR DIURNAL HEATING WHICH TRIGGERS THE AFTERNOON CONVECTION.
GUIDANCE UNDERFORECASTING WIND SPEED A BIT THEN I INCREASED IT
SLIGHTLY FOR TONIGHT AND MONDAY.

&&

.MARINE...SINCE WINDS HAVE INCREASED THROUGH THE LOCAL AREA.
PRECAUTIONARY STATEMENTS ARE IN EFFECT FOR ALL BUT THE NEAR SHORE
WATERS OF WESTER PUEERTO RICO.

&&

.HYDROLOGY...WITH THE GROUNDS SOAKED FROM RAINFALL IN PREVIOUS DAYS
THE WATER LEVELS OF SOME RIVERS AND STREAMS REMAIN HIGH ESPECIALLY
ALONG THE NORTH HALF OF PUERTO RICO. ADDITIONAL RAINFALL WILL FEED
MORE WATER INTO THESE STREAMS AND RIVERS INCREASING THEIR WATER
LEVEL HEIGHTS.

&&

.CLIMATE...MAY IS A MONTH IN WHICH PRECIPITATION AMOUNTS AREAWIDE
MAKE A PEAK. FOR SOME SECTORS OF THE ISLAND THIS IS THE MONTH WITH
HIGHER AVERAGE RAINFALL AMOUNTS DURING THE YEAR.

&&

.PRELIMINARY POINT TEMPS/POPS...
SJU  73  84  73 /  40  50  40  40
STT  73  84  73 /  40  40  40  40

&&

.SJU WATCHES/WARNINGS/ADVISORIES...
PR...NONE.
VI...NONE.

&&

RIVERA

Hazardous weather outlook, May 9, 6:10 AM AST, 21 hours 30 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SAN JUAN PR
610 AM AST SUN MAY 9 2004

PRZ001>013-AMZ710>750-101000-
610 AM AST SUN MAY 9 2004

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PUERTO RICO.

.TODAY...MOISTURE ASSOCIATED WITH THE REMNANTS OF A COLD FRONTAL
BOUNDARY...WILL COMBINE WITH THE LOCAL EFFECTS TO PRODUCE SCATTERED
TO NUMEROUS SHOWERS AND ISOLATED THUNDERSTORMS...MAINLY ACROSS THE
INTERIOR AND WEST PART OF PUERTO RICO DURING THE AFTERNOON HOURS. A
FEW LOCATIONS WILL AGAIN RECEIVE ENOUGH RAINFALL TO RESULT IN SOME
URBAN AND SMALL STREAM FLOODING...WITH THE POTENTIAL FOR LOCALIZED
FLASH OR RIVER FLOODING.

.SPOTTER CALL TO ACTION STATEMENT...
SPOTTER ACTIVATION MAY BE REQUIRED.

.DAYS TWO THROUGH SEVEN...

EXPECT SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS. ASSOCIATED
RAINFALL COULD RESULT IN AT LEAST SOME URBAN AND SMALL STREAM
FLOODING.

A MODERATE TO FRESH WIND FLOW AND CHOPPY SEAS WILL PREVAIL ACROSS
THE LOCAL WATERS UNTIL WEDNESDAY.

VIZ001-002-AMZ710>730-101000-
610 AM AST SUN MAY 9 2004

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE U.S. VIRGIN ISLANDS.

.TODAY...SCATTERED SHOWERS WILL OCCUR ACROSS MOST OF THE ISLANDS
TODAY. ASSOCIATED RAINFALL COULD RESULT IN SOME URBAN AND GUT
FLOODING.

.SPOTTER CALL TO ACTION STATEMENT...
SPOTTER ACTIVATION IS NOT ANTICIPATED.

.DAYS TWO THROUGH SEVEN...

SCATTERED SHOWERS WILL OCCUR ACROSS THE U.S. VIRGIN ISLANDS DURING
THE NEXT SEVERAL DAYS. NO HAZARDOUS WEATHER CONDITIONS IS EXPECTED.

A MODERATE TO FRESH WIND FLOW AND CHOPPY SEAS WILL PREVAIL ACROSS
THE LOCAL WATERS UNTIL WEDNESDAY.

STAY TUNED TO NOAA WEATHER RADIO AND OTHER LOCAL MEDIA FOR FURTHER
DETAILS OR UPDATES.

FOR ADDITIONAL INFORMATION...VISIT THE NATIONAL WEATHER SERVICE WEB
SITE FOR PUERTO RICO AND THE U.S. VIRGIN ISLANDS AT (ALL LOWERCASE
LETTERS): HTTP://WWW.SRH.NOAA.GOV/SJU.

In the hours before

Local storm report, May 10, 12:31 AM AST, 3 hours 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN JUAN PR
1231 AM AST MON MAY 10 2004

..TIME...   ...EVENT...     ...CITY LOCATION...      ...LAT.LON...
..DATE...   ....MAG....     ..COUNTY LOCATION...ST.. ...SOURCE....
            ..REMARKS..

0545 PM     FLASH FLOOD      VEGA ALTA               18.42N 66.32W
05/09/2004                   VEGA ALTA          PR   EMERGENCY MNGR

            RIVER CIBUCO WAS REPORTED OUT OF ITS BANKS AND FLOODING
            ROADS 2, 620, 647, 675, 676, 690, IN THE MUNICIPALITIES
            OF VEGA BAJA AND VEGA ALTA

&&

RM

Local storm report, May 10, 12:35 AM AST, 3 hours 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN JUAN PR
1235 AM AST MON MAY 10 2004

..TIME...   ...EVENT...     ...CITY LOCATION...      ...LAT.LON...
..DATE...   ....MAG....     ..COUNTY LOCATION...ST.. ...SOURCE....
            ..REMARKS..

0555 PM     HEAVY RAIN       ANASCO                  18.29N 67.14W
05/09/2004  0.00 INCH        ANASCO             PR   EMERGENCY MNGR

            LANSLIDE WAS REPORTED IN ANASCO, AT THE OVEJA AND
            VILLALOBO SECTORS AND WAS AFFECTING ONE HOUSE.

&&

RM

Local storm report, May 10, 12:38 AM AST, 3 hours 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN JUAN PR
1238 AM AST MON MAY 10 2004

..TIME...   ...EVENT...     ...CITY LOCATION...      ...LAT.LON...
..DATE...   ....MAG....     ..COUNTY LOCATION...ST.. ...SOURCE....
            ..REMARKS..

0555 PM     FLOOD            CABO ROJO               18.09N 67.15W
05/09/2004                   CABO ROJO          PR   AIRPLANE PILOT

            A HOUSE WS REPORTED TO BE AFECTED BY FLOOD WATERS AT
            URBANIZACION RIVERA IN CABO ROJO.

0555 PM     FLOOD            CABO ROJO               18.09N 67.15W
05/09/2004                   CABO ROJO          PR   EMERGENCY MNGR

            A HOUSE WAS REPORTED FLOODED AT URBANIZACION RIVERA IN
            CABO ROJO.

&&

RM

Local storm report, May 10, 12:38 AM AST, 3 hours 2 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE SAN JUAN PR
1238 AM AST MON MAY 10 2004

..TIME...   ...EVENT...     ...CITY LOCATION...      ...LAT.LON...
..DATE...   ....MAG....     ..COUNTY LOCATION...ST.. ...SOURCE....
            ..REMARKS..

0555 PM     FLOOD            CABO ROJO               18.09N 67.15W
05/09/2004                   CABO ROJO          PR   EMERGENCY MNGR

            A HOUSE WAS REPORTED FLOODED AT URBANIZACION RIVERA IN
            CABO ROJO.

&&

RM

Event by event

1 heavy rain. Local standard time, as filed.

Heavy Rain, San Juan and Vicinity

When: May 10, 3:40 AM AST to 5:10 AM AST
Where: San Juan and Vicinity County, Trujillo Alto
Reported by: EMERGENCY MANAGER

Small stream Quebrada Grande was reported out of its banks.

What these are

Heavy Rain: Rainfall totals unusual for the place and season that did not produce a flood.

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

The same day elsewhere

Every storm in Puerto Rico in 2004 Every state in 2004 This day in weather history Warnings in Puerto Rico, May 2004

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: 5398714.