

000 

WGCA72 TJSJ 220601

FFSSJU



FLASH FLOOD STATEMENT

NATIONAL WEATHER SERVICE SAN JUAN PR

201 AM AST MON SEP 22 2008



PRC001-007-009-015-019-021-023-025-029-031-033-035-037-039-041-043-

045-047-049-051-053-055-057-059-061-063-067-069-073-075-077-079-081-

083-085-087-089-091-093-095-097-101-103-105-107-109-111-113-119-121-

123-125-127-129-133-135-137-139-141-143-145-147-149-151-153-221130-

/O.CON.TJSJ.FF.W.0058.000000T0000Z-080922T1130Z/

/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BAYAMON PR-HORMIGUEROS PR-CIALES PR-CAGUAS PR-CIDRA PR-COAMO PR-

CAYEY PR-COROZAL PR-COMERIO PR-AIBONITO PR-AGUAS BUENAS PR-

BARRANQUITAS PR-JUNCOS PR-JAYUYA PR-GURABO PR-ADJUNTAS PR-MARICAO PR-

OROCOVIS PR-NARANJITO PR-MOROVIS PR-TOA ALTA PR-SABANA GRANDE PR-

SAN GERMAN PR-SAN LORENZO PR-UTUADO PR-YAUCO PR-VILLALBA PR-

TRUJILLO ALTO PR-VEGA ALTA PR-LAS PIEDRAS PR-LAS MARIAS PR-LARES PR-

DORADO PR-GUAYANILLA PR-ARROYO PR-LUQUILLO PR-PATILLAS PR-MAUNABO PR-

NAGUABO PR-GUAYNABO PR-CEIBA PR-CANOVANAS PR-GUAYAMA PR-FAJARDO PR-

CULEBRA PR-GUANICA PR-CAROLINA PR-HUMACAO PR-JUANA DIAZ PR-MANATI PR-

PONCE PR-CABO ROJO PR-CATANO PR-MAYAGUEZ PR-VEGA BAJA PR-SAN JUAN PR-

SALINAS PR-SANTA ISABEL PR-PENUELAS PR-LOIZA PR-RIO GRANDE PR-

YABUCOA PR-VIEQUES PR-TOA BAJA PR-LAJAS PR-

201 AM AST MON SEP 22 2008



...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 730 AM AST FOR

LAJAS...TOA BAJA...VIEQUES...YABUCOA...RIO GRANDE...LOIZA...

PENUELAS...SANTA ISABEL...SALINAS...SAN JUAN...VEGA BAJA...

MAYAGUEZ...CATANO...CABO ROJO...PONCE...MANATI...JUANA DIAZ...

HUMACAO...CAROLINA...GUANICA...CULEBRA...FAJARDO...GUAYAMA...

CANOVANAS...CEIBA...GUAYNABO...NAGUABO...MAUNABO...PATILLAS...

LUQUILLO...ARROYO...GUAYANILLA...DORADO...LARES...LAS MARIAS...LAS

PIEDRAS...VEGA ALTA...TRUJILLO ALTO...VILLALBA...YAUCO...UTUADO...SAN

LORENZO...SAN GERMAN...SABANA GRANDE...TOA ALTA...MOROVIS...

NARANJITO...OROCOVIS...MARICAO...ADJUNTAS...GURABO...JAYUYA...

JUNCOS...BARRANQUITAS...AGUAS BUENAS...AIBONITO...COMERIO...

COROZAL...CAYEY...COAMO...CIDRA...CAGUAS...CIALES...HORMIGUEROS AND

BAYAMON MUNICIPALITIES...



AT 152 AM AST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 

WIDE AREAS OF MODERATE TO HEAVY RAIN OVER MOST OF THE WARNED AREA. 

ADDITIONAL RAINS ARE STILL FALLING IN THOSE AREAS HARDEST HIT. AREAS 

THAT HAVE RECEIVED THE MOST RAIN SINCE MIDNIGHT INCLUDE THE SOUTHERN 

COASTS OF GUAYANILLA...PENUELAS...PONCE...SALINAS AND 

GUAYAMA...NAGUABO...VIEQUES AND PART OF CULEBRA. EACH OF THESE AREAS 

HAS RECEIVED MORE THAN ONE INCH SINCE ONLY MIDNIGHT.



MANY AREA RIVERS REMAIN WELL ABOVE FLOOD STAGE IN ONE OF THE MOST 

SERIOUS FLOOD EVENTS IN RECENT MEMORY. BELOW ARE A FEW OF THE LATEST 

RIVER STAGES NOTED BY UNITED STATES GEOLOGICAL SURVEY RIVER GAGES 

FOLLOWED BY THE STAGE AT WHICH THE RIVER IS CONSIDERED IN FLOOD. 



RIVER                                  STAGE             FLOOD STAGE 

RIO GUAYANES AT CENTRAL ROIG           27.23 FALLING SLOWLY  15.00

RIO MAUNABO AT LIZAS                   13.90 FALLING RAPIDLY 10.00

RIO MARIN AT PATILLAS                   14.74 RISING          10.00

RIO CAYAGUAS AT CERRO GORDO            15.86 FALLING         15.00

RIO GRANDE DE LOIZA AT HIGHWAY 183     17.20 RISING SLOWLY   14.00

RIO VALENCIANO NEAR JUNCOS             15.14 FALLING         12.00

RIO GRANDE DE LOIZA AT CAGUAS          17.17 RISING          16.00

RIO GURABO IN GURABO                   27.82 RISING          18.00

RIO GRANDE DE LOIZA IN TRUJILLO ALTO   29.54 FALLING SLOWLY  22.00

RIO FAJARDO NEAR FAJARDO                8.30 FALLING SLOWLY   8.00

RIO GUAYANILLA                          9.14 FALLING         12.00

RIO GUANAJIBO                          12.20 FALLING         13.00

RIO DE LA PLATA AT COMERIO             11.01 FALLING         11.00



RIVERS THAT ARE FALLING MAY NOT CONTINUE TO FALL AS NEW BANDS OF 

PRECIPITATION MOVE ONSHORE FROM THE SOUTH.



MODELS INDICATE THAT THE WIDE BAND OF PRECIPITATION WILL CONTINUE 

MOVING OVER PUERTO RICO THROUGH MONDAY AND INTO TUESDAY. WE EXPECT 

STRONGER CONVECTION WHEN UPPER LEVEL DIVERGENCE AND AFTERNOON 

HEATING GIVE ADDITIONAL STRENGTH TO SHOWERS AND THUNDERSTORMS IN 

THIS LOW PRESSURE. THEREFORE EXPECT ADDITIONAL FLOODING IN MANY 

AREAS OF PUERTO RICO DURING THE DAY TODAY. CURRENTLY WINDS HAVE NOT 

BEEN A PROBLEM AND RAPID STRENGTHENING OF THIS SYSTEM IS NOT 

FORECAST TO OCCUR IN THE NEXT 12 HOURS...BUT BECAUSE OF THE SLOW 

MOVEMENT OF THE LOW AND ITS TRAJECTORY TOWARD THE NORTH...IT WILL 

PRODUCE CONTINUED FLOODING OF A MOST SERIOUS NATURE.



LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO 

COMERIO...JAYUYA...PLAYA FORTUNA...VIEQUES...VEGA BAJA...VEGA 

ALTA...TRUJILLO ALTO...TOA BAJA...SUAREZ...SANTA BARBARA...SAN 

JUAN...SAN ISIDRO...SAN ANTONIO...SABANA SECA...ROOSEVELT 

ROADS...RIO LAJAS...SAN JOSE...TOA ALTA...RIO 

GRANDE...RAMOS...PAJAROS...NARANJITO...MOROVIS...MONSERRATE...MIRANDA

...MANATI...LUQUILLO...LUIS M. CINTRON...LOIZA...LEVITTOWN...LA 

LUISA...LA DOLORES...JUNCOS...INGENIO...HATO CANDAL...H. RIVERA 

COLON...GUAYNABO...GALATEO...FRANQUEZ...FAJARDO...DORADO...COTO 

NORTE...COROZAL...CIALES...CELADA...GURABO...CEIBA...CATANO...

CAROLINA...CANOVANAS...CANDELARIA ARENAS...CANDELARIA...CAMPO 

RICO...CAMPANILLA...CAGUAS...BRENAS...BAYAMON...BARCELONETA...

BARAHONA...BAIROA...AGUAS CLARAS AND AGUAS BUENAS.



MOST FLOOD DEATHS OCCUR IN AUTOMOBILES AS DID SEVERAL YESTERDAY. 

NEVER DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE 

ROADWAY. FLOOD WATERS ARE USUALLY DEEPER THAN THEY APPEAR. JUST ONE 

FOOT OF FLOWING WATER IS POWERFUL ENOUGH TO SWEEP VEHICLES OFF THE 

ROAD. WHEN ENCOUNTERING FLOODED ROADS MAKE THE SMART CHOICE...TURN 

AROUND...DONT DROWN.



LAT...LON 1821 6531 1809 6525 1804 6556 1817 6564

      1793 6589 1792 6726 1824 6719 1826 6653

      1851 6655 1843 6554 1829 6557 1819 6545

      1821 6531 1831 6543 1839 6538 1836 6519



$$



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