Flash Flood Warning 14, NWS JSJ

004 
WGCA72 TJSJ 301552
FFSSJU

Flash Flood Statement
National Weather Service San Juan PR
1152 AM AST Thu Jul 30 2020

PRC003-011-097-117-301645-
/O.CON.TJSJ.FF.W.0014.000000T0000Z-200730T1645Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Anasco PR-Mayaguez PR-Rincon PR-Aguada PR-
1152 AM AST Thu Jul 30 2020

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1245 PM AST FOR
ANASCO...MAYAGUEZ...RINCON AND AGUADA MUNICIPALITIES...

At 1149 AM AST, local news and social media indicated flooding 
across multiple areas from Mayaguez to Aguada. Also, the Yaguez 
River is out of its bank. Four to six inches of rain with isolated 
higher amounts have already fallen. Flash flooding is already 
occurring.

HAZARD...Life threatening flash flooding. Heavy rain producing flash 
         flooding. 

SOURCE...Radar indicated. 

IMPACT...Life threatening flash flooding of creeks and streams, 
         urban areas, highways, streets and underpasses.The Flash 
         Flooding is capable of producing unusual severity. Action 
         is needed to protect live and property. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents living along streams and creeks should take immediate
precautions to protect life and property.

&&

LAT...LON 1839 6715 1839 6713 1832 6713 1830 6705
      1827 6704 1825 6708 1819 6702 1817 6708
      1815 6709 1816 6711 1815 6716 1817 6718
      1821 6715 1828 6719 1830 6723 1836 6727
      1837 6724 1835 6723 1838 6724 1842 6716

FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
EXPECTED RAINFALL...1-3 INCHES IN 3 HOUR

$$

CAM

410 
WGCA52 TJSJ 301617
FFWSJU
PRC003-011-097-117-301945-
/O.EXT.TJSJ.FF.W.0014.000000T0000Z-200730T1945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service San Juan PR
1217 PM AST Thu Jul 30 2020

The National Weather Service in San Juan has extended the

* Flash Flood Warning for...
  Anasco Municipality in Puerto Rico...
  Mayaguez Municipality in Puerto Rico...
  Rincon Municipality in Puerto Rico...
  Aguada Municipality in Puerto Rico...

* Until 345 PM AST

* At 1214 PM AST, Doppler radar continues to indicated rain bands 
  from Isaias producing moderate to heavy rain across the warned 
  area. Between 4 and 6 inches of rains with isolated higher amounts 
  have already fallen. Multiple reports of flash flooding, river 
  flooding, mudslides and fallen tress were received. Flash flooding 
  is already occurring.

  HAZARD...Life threatening flash flooding. Heavy rain producing 
           flash flooding. 

  SOURCE...Radar indicated. 

  IMPACT...Life threatening flash flooding of creeks and streams, 
           urban areas, highways, streets and underpasses. The Flash 
           Flooding is capable of producing unusual severity. Action 
           is needed to protect live and property. 

Excessive rainfall over the warned area will cause mud slides near
steep terrain. The mud slide can consist of rock, mud, vegetation and
other loose materials.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents living along streams and creeks should take immediate
precautions to protect life and property.

&&

LAT...LON 1839 6715 1839 6713 1832 6713 1830 6705
      1827 6704 1825 6708 1819 6702 1817 6708
      1815 6709 1816 6711 1815 6716 1817 6718
      1821 6715 1828 6719 1830 6723 1836 6727
      1837 6724 1835 6723 1838 6724 1842 6716

FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
EXPECTED RAINFALL...1-3 INCHES IN 3 HOUR

$$

CAM

767 
WGCA72 TJSJ 301942
FFSSJU

Flash Flood Statement
National Weather Service San Juan PR
342 PM AST Thu Jul 30 2020

PRC003-011-097-117-301946-
/O.EXP.TJSJ.FF.W.0014.000000T0000Z-200730T1945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Anasco PR-Mayaguez PR-Rincon PR-Aguada PR-
342 PM AST Thu Jul 30 2020

...THE FLASH FLOOD WARNING FOR ANASCO...MAYAGUEZ...RINCON AND AGUADA
MUNICIPALITIES WILL EXPIRE AT 345 PM AST...

The heavy rain has ended. Flood waters have have continued to slowly 
recede. Major flooding is no longer expected to pose a threat at 
this time. Please continue to heed to any remaining road closures 
and allow time for swollen rivers and streams to return to normal 
levels. Although the Flash Flood Warning has expired, there is a 
Flood Watch in effect through Friday morning for these areas as 
additional rains will remain possible during the next few hours .  

LAT...LON 1839 6715 1839 6713 1832 6713 1830 6705
      1827 6704 1825 6708 1819 6702 1817 6708
      1815 6709 1816 6711 1815 6716 1817 6718
      1821 6715 1828 6719 1830 6723 1836 6727
      1837 6724 1835 6723 1838 6724 1842 6716

$$

RAM

Area Forecast Discussion
National Weather Service San Juan PR
355 AM AST Thu Jul 30 2020

.SYNOPSIS...Tropical Storm Isaias will continue west northwest and
is expected to be north of Hispaniola by this afternoon. A minor
tropical wave will move through the area on Saturday followed by
another weak disturbance on Sunday night. East southeast flow will
then bring warmer than normal temperatures to the northeast coast
with patches moisture spawning showers and afternoon thunderstorms
for the remainder of next week.

&&

.SHORT TERM...Today through Saturday...

Rainbands with heavy rain associated with Tropical Storm Isaias
will continue to affect most of Puerto Rico through the morning
hours, with the heaviest accumulations expected across the
southern and eastern half of Puerto Rico. These rainbands will be
capable of producing winds gusts as high as 50 mph. In addition,
the most persistent rainbands will also be capable of producing areas
of flooding. Across the USVI, occasional rainbands will also be
possible through the morning hours, however, the activity should
not be as widespread there as it will be across Puerto Rico. By
this afternoon into this evening, as Isaias continues to move
away, rainfall activity will gradually diminish across the area.

Much more tranquil weather conditions are expected on Friday as much
drier air moves over the area. Therefore, shower activity is
expected to be limited. Winds will also be lighter. Afternoon
convection cannot be ruled out across northwest Puerto Rico due to
local and diurnal effects.

A band of low-level moisture will move over the area on Saturday.
This will result in some passing showers over eastern PR and the
USVI during the morning hours followed by the development of
afternoon convection across western PR. However, the mid to upper-
levels will be dominated by a ridge, therefore, any afternoon
convection that develops is not expected to be intense.

.LONG TERM...Sunday through Saturday...
The TUTT low that digs down into the Atlantic northeast of Puerto
Rico moves west, but stays north of the forecast area in the
latest run. After it passes on Sunday, high pressure moves into
the area Monday and Tuesday. Another TUTT develops in the western
tropical Atlantic and sweeps through the Caribbean sea adjoining
Puerto Rico late Wednesday and Thursday followed by weak high
pressure on Saturday.

The tropical wave that follows Isaias, will be exiting the area
by early Sunday morning, but will be followed closely by a
disturbance presently near 40 degrees west longitude. It is
expected to brush by the area Sunday night. East southeast to
southeast flow follows this disturbance Monday and Tuesday with
precipitable water values from 1.8 to 2.2 inches. After Tuesday
patches of good moisture move through surrounded by slightly below
normal moisture. These east to southeast winds will also bring
warmer than normal temperatures to the Greater San Juan and
Bayamon metropolitan areas

Sunday through Wednesday 500 mb temperatures range from minus 5 to
minus 6.5 providing the back drop for modest thunderstorms to
develop in the patchy moisture. Some warming occurs Wednesday and
Thursday, but 500 mb temperatures return to even lower values
afterwards. These thunderstorms will be mainly in western and
interior Puerto Rico during the afternoons. Isolated nocturnal
thunderstorms are also possible over the local waters.

&&

.AVIATION...SHRA/TSRA activity and BKN/OVC ceilings with areas of MVFR
conds and mtn obscurations will continue across all terminals
through at least 30/18z due to rainbands associated with Tropical
Storm Isaias with improvements expected across the Leeward Islands
and USVI terminals afterwards and across PR terminals after
30/22z. Winds will be from the ESE- SE between 15 and 25 kts with
peak gusts as high 45 kts in the rainbands.

&&

.MARINE...Tropical Storm Isaias has strong winds that extend well
away from its center and these winds have generated seas of 22-23
feet at Buoy 41043 just north of our outer Atlantic waters winds
and seas will begin to improve as TS Isaias move west northwest
and away from the local area this morning. Small craft advisory
conditions are expected to end early Saturday morning. The second
of the next several waves to pass through the area may bring
sufficient winds to bring a brief episode of 7 foot seas to our
northern local outer Atlantic waters on Sunday night.

&&

.HYDROLOGY...Several rain bands from TS Isaias have entered
southern Puerto Rico. Since these have been fairly fast moving,
accumulations have generally not yet brought anything more than
ponding in poorly drained areas and as of 4 AM AST were less than
one inch. At this time river and streams have been able to handle
the run-off without rising above normal flows. Nevertheless,
additional rainfall will likely cause some rivers to approach
bankfull in southeast and central Puerto Rico this morning.

&&

.PRELIMINARY POINT TEMPS/POPS...
SJU  87  78  91  79 / 100  70  20  30
STT  87  82  89  79 /  90  60  20  40

&&

.SJU WATCHES/WARNINGS/ADVISORIES...
PR...Tropical Storm Warning for Central Interior-Culebra-Eastern
     Interior-Mayaguez and Vicinity-North Central-Northeast-
     Northwest-Ponce and Vicinity-San Juan and Vicinity-
     Southeast-Southwest-Vieques-Western Interior.

     High Rip Current Risk through Friday afternoon for Central
     Interior-Culebra-Mayaguez and Vicinity-North Central-
     Northeast-Northwest-Ponce and Vicinity-San Juan and
     Vicinity-Southeast-Southwest-Vieques-Western Interior.

     Flash Flood Watch through Friday morning for Central Interior-
     Culebra-Eastern Interior-Mayaguez and Vicinity-North
     Central-Northeast-Northwest-Ponce and Vicinity-San Juan and
     Vicinity-Southeast-Southwest-Vieques-Western Interior.

     Coastal Flood Advisory until 6 PM AST this evening for Central
     Interior-Culebra-Mayaguez and Vicinity-North Central-
     Northeast-Northwest-Ponce and Vicinity-San Juan and
     Vicinity-Southeast-Southwest-Vieques-Western Interior.

     High Surf Advisory until 6 PM AST this evening for Central
     Interior-Culebra-Mayaguez and Vicinity-North Central-
     Northeast-Northwest-Ponce and Vicinity-San Juan and
     Vicinity-Southeast-Southwest-Vieques-Western Interior.

VI...Tropical Storm Warning for St Croix-St.Thomas...St. John...and
     Adjacent Islands.

     Flash Flood Watch through Friday morning for St Croix-
     St.Thomas...St. John...and Adjacent Islands.

     Coastal Flood Advisory until 6 PM AST this evening for St Croix-
     St.Thomas...St. John...and Adjacent Islands.

     High Surf Advisory until 6 PM AST this evening for St Croix-
     St.Thomas...St. John...and Adjacent Islands.

     High Rip Current Risk through late tonight for St Croix-
     St.Thomas...St. John...and Adjacent Islands.

AM...Tropical Storm Warning for Caribbean Waters of Puerto Rico from
     10 NM to 17N-Anegada Passage Southward to 17N-Atlantic
     Waters of Puerto Rico and USVI from 10 NM to 19.5N-Coastal
     Waters of Northern Puerto Rico out 10 NM-Coastal Waters of
     Northern USVI and Culebra out 10 NM-Coastal Waters of
     Northwestern Puerto Rico out 10 NM-Coastal Waters of
     Southern Puerto Rico out 10 NM-Coastal Waters of Southern
     USVI Vieques and Eastern Puerto Rico out 10 NM-Coastal
     Waters of Southwestern Puerto Rico out 10 NM-Mona Passage
     Southward to 17N.

&&

SHORT TERM...GL/CAM
LONG TERM....WS/MB
PUBLIC DESK...FRG/LIS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN JUAN PR
400 AM AST THU JUL 30 2020

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

0347 AM     TSTM WND DMG     PONCE                   17.99N 66.61W
07/30/2020                   PONCE              PR   NWS EMPLOYEE

            NWS EMPLOYEE REPORTED A TREE THAT FELL DOWN ACROSS A ROAD
            IN SECTOR PORTUGESE IN PONCE.

&&

FRAMOS