Debris Flow in Puerto Rico, June 10, 2004

Name: Debris Flow in Puerto Rico, June 10, 2004
Start: 2004-06-10T02:11
End: 2004-06-10T02:11
Location: Puerto Rico

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

1 debris flow, 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 Jun 9, 8:41 PM AST, 5 hours 30 minutes earlier.

Area forecast discussion, Jun 9, 8:41 PM AST, 5 hours 30 minutes before

PUERTO RICO AND U.S. VIRGIN ISLANDS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN JUAN PR
840 PM AST WED JUN  9 2004

UPDATE...
SURGE OF SHOWERS AND ISOLATED EMBEDDED THUNDERSTORMS ASSOCIATED WITH
THE TROPICAL WAVE SOUTHEAST OF THE LOCAL AREA IS MIGRATING NORTHWEST
THIS EVENING AND IS LIKELY TO IMPACT THE SOUTHERN AND EASTERN
COASTAL AREAS OF PUERTO RICO. HAVE RAISED POPS ACCORDINGLY.
ADDITIONALLY...HAVE ADJUSTED THE POPS FOR ST. CROIX GIVEN THE
PROXIMITY OF THE HEAVY RAIN OFFSHORE.

STREAMER EMANATING FROM EL YUNQUE CONTINUES TO FIRE UP.  UNTIL EARLY
MORNING THURSDAY HAVE KEPT POPS HIGH IN A BAND DOWNWIND OF EL YUNQUE
TO COVER BASES.

KIMBERLAIN

.DISCUSSION...WILL CONTINUE WITH NOT MUCH CHANGES IN THE ACTUAL
FORECAST PACKAGE. SURFACE ANALYSIS DEPICTED A TROPICAL WAVE THIS
MORNING MAINLY SOUTH OF THE LOCAL AREA WHERE DOPPLER RADAR SHOWED AN
AREA OF NUMEROUS SHOWERS AD THUNDERSTORMS OVER THE CARIBBEAN WATERS.
THIS WAVE SHOULD CONTINUE TO MOVE WEST THE REST OF THE AFTERNOON AND
TONIGHT EXITING THE LOCAL AREA EARLY THURSDAY. PART OF THE MOISTURE
AND INSTABILITY ASSOCIATED TO THIS WAVE SHOULD RESULT IN INCREASED
CHANCES OF PRECIPITATION THURSDAY.

ANOTHER TROPICAL WAVE IS EXPECTED TO ARRIVE TO THE LOCAL ISLANDS
FRIDAY. THIS SECOND WAVE WILL IN GENERAL MOVE MORE TO THE NORTH
WITH HIGHER CHANCES OF PRECIPITATION OVER THE U.S. VIRGIN ISLANDS
AND PUERTO RICO FRIDAY...SATURDAY AND POSSIBLY SUNDAY WITH A DRIER
WEATHER MONDAY.

&&

.CLIMATE...ALTHOUGH JUNE IS CHARACTERIZED BY A MINI DROUGHT IN
GENERAL...THIS PARTICULAR JUNE HAVE STARTED AND LOOKS LIKE IT WILL
CONTINUE WETTER THAN USUAL.

&&

.PRELIMINARY POINT TEMPS/POPS...
SJU  78  89  78  89 /  40  50  40  40
STT  79  89  79  89 /  50  50  40  40

&&

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

&&

RIVERA

Hazardous weather outlook, Jun 9, 6:12 AM AST, 19 hours 59 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SAN JUAN PR
612 AM AST WED JUN 9 2004

PRZ001>013-AMZ710>750-101000-
612 AM AST WED JUN 9 2004

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PUERTO RICO.

.TODAY...A TROPICAL WAVE LOCATED OVER THE SOUTHEAST CARIBBEAN EARLY
THIS MORNING...WILL CONTINUE MOVING WEST NORTHWEST AND PASS MAINLY
SOUTH OF THE LOCAL AREA TODAY AND TONIGHT. HOWEVER...MOISTURE
ASSOCIATED WITH THIS WAVE WILL BEGIN TO SPREAD ACROSS PUERTO RICO
LATER TODAY AND TONIGHT. THIS MOISTURE WILL COMBINE WITH DAYTIME
HEATING...LOCAL SEA BREEZES AND MOUNTAIN UPSLOPE LIFTING THIS
AFTERNOON...TO PRODUCE SCATTERED TO NUMEROUS SHOWERS AND ISOLATED
THUNDERSTORMS...ESPECIALLY OVER THE CENTRAL AND WESTERN INTERIOR AND
WEST SECTIONS OF THE ISLAND. ALTHOUGH NO SIGNIFICANT FLOODING IS
EXPECTED...A FEW LOCATIONS COULD RECEIVE ENOUGH RAINFALL TO RESULT
IN SOME URBAN AND SMALL STREAM FLOODING.

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

.DAYS TWO THROUGH SEVEN...MOISTURE ASSOCIATED WITH THE TROPICAL WAVE
WILL LINGER ACROSS PUERTO RICO THURSDAY AND FRIDAY. SCATTERED TO
NUMEROUS SHOWERS AND ISOLATED THUNDERSTORMS WILL CONTINUE TO AFFECT
THE ISLAND BOTH DAYS AND MAY RESULT IN AT LEAST SOME URBAN AND SMALL
STREAM FLOODING. A SECOND TROPICAL WAVE IS EXPECTED TO AFFECT THE
LOCAL AREA FRIDAY AFTERNOON THROUGH SATURDAY.

VIZ001-002-AMZ710>730-101000-
612 AM AST WED JUN 9 2004

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

.TODAY...A TROPICAL WAVE LOCATED OVER THE SOUTHEAST CARIBBEAN EARLY
THIS MORNING...WILL CONTINUE MOVING WEST NORTHWEST AND PASS MAINLY
SOUTH OF THE LOCAL AREA TODAY AND TONIGHT. MOISTURE ASSOCIATED WITH
THIS WAVE WILL BEGIN TO SPREAD ACROSS THE U.S. VIRGIN ISLANDS LATER
TODAY AND TONIGHT. THIS MOISTURE WILL COMBINE WITH LOCAL EFFECTS
THIS AFTERNOON TO PRODUCE SCATTERED SHOWERS. ALTHOUGH NO SIGNIFICANT
FLOODING IS EXPECTED...A FEW LOCATIONS COULD RECEIVE ENOUGH RAINFALL
TO RESULT IN SOME URBAN AND GUT FLOODING.

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

.DAYS TWO THROUGH SEVEN...MOISTURE ASSOCIATED WITH THE TROPICAL WAVE
WILL LINGER ACROSS THE U.S. VIRGIN ISLANDS THURSDAY AND FRIDAY.
SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS WILL AFFECT THE LOCAL
ISLANDS BOTH DAYS AND MAY RESULT IN AT LEAST SOME URBAN AND GUT
FLOODING. A SECOND TROPICAL WAVE IS EXPECTED TO AFFECT THE LOCAL
AREA FRIDAY AFTERNOON THROUGH SATURDAY.

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, Jun 10, 12:32 AM AST, 1 hour 39 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN JUAN PR
1232 AM AST THU JUN 10 2004

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

909 PM     FLASH FLOOD      MAYAGUEZ                18.20N 67.14W
06/09/2004                   MAYAGUEZ           PR   EMERGENCY MNGR

            LOCAL EMERGENCY MANAGERS REPORTED SEVERAL ROADS UNDER
            WATER IN A FEW SECTORS. A RAIN GAGE INDICATED THREE
            INCHES OF RAIN IN ABOUT 15 TO 20 MINUTE PERIOD.

&&

BRAD DIEHL

Local storm report, Jun 10, 12:38 AM AST, 1 hour 33 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN JUAN PR
1238 AM AST THU JUN 10 2004

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

1120 PM     FLASH FLOOD      RIO GRANDE              18.38N 65.84W
06/09/2004                   RIO GRANDE         PR   EMERGENCY MNGR

            EMERGENCY MANAGERS REPORTED HIGHWAY 956 WAS CLOSED TO
            TRAFFIC AND 5 RESIDENCES WERE FLOODED IN AN AREA CALLED
            RIVER VALLEY IN SECTOR CAMBALACHE.

&&

BRAD DIEHL

Event by event

1 debris flow. Local standard time, as filed.

Debris Flow, San Juan and Vicinity

When: June 10, 2:11 AM AST
Where: San Juan and Vicinity forecast zone
Reported by: EMERGENCY MANAGER

A landslide was reported along road 853, just after the rock quarry.

What these are

Debris Flow: A fast-moving slurry of mud, rock and debris, usually on a slope soaked by heavy rain or stripped by a fire.

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, June 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: 5406580.