Flash Flood Warning 114, NWS JSJ

677 
WGCA52 TJSJ 230550
FFWSJU
PRC071-115-231200-
/O.EXT.TJSJ.FF.W.0114.000000T0000Z-170923T1200Z/
/00000.3.DM.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service San Juan PR
Issued by National Weather Service Miami FL
150 AM AST SAT SEP 23 2017

...FLASH FLOOD EMERGENCY FOR ISABELLA AND QUEBRADILLAS...

The National Weather Service in San Juan has extended the

* Flash Flood Warning for...
  A Dam Failure in...
  Eastern Isabela Municipality in Puerto Rico...
  Central Quebradillas Municipality in Puerto Rico...

* Until 800 AM AST Saturday

* At 130 AM AST, dam operators continued to report that a failure of 
  the Guajataca Dam is imminent, potentially causing life- 
  threatening flash flooding downstream on the Rio Guajataca River.

The National Weather Service has been running various dam break 
scenarios. Results indicate that a full breach would result in large 
peak flows that would reach the coast in under 12 hours. Flood 
extent mapping of these scenarios keep flows largely within the 
canyon river channel.

This is a FLASH FLOOD EMERGENCY for Eastern ISABELLA, Western 
QUEBRADILLAS and SURROUNDING AREAS. SEEK HIGHER GROUND NOW!

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Move to higher ground now. This is an extremely dangerous and
life-threatening situation. Do not attempt to travel unless you are
fleeing an area subject to flooding or under an evacuation order.

Act quickly to protect your life. Please heed instructions from 
authorities.

&&

LAT...LON 1850 6694 1845 6695 1842 6692 1839 6692
      1839 6693 1838 6694 1841 6696 1843 6696
      1845 6698 1850 6697

$$

Stockton

977 
WGCA52 TJSJ 231158
FFWSJU
PRC071-115-231800-
/O.EXT.TJSJ.FF.W.0114.000000T0000Z-170923T1800Z/
/00000.3.DM.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service San Juan PR
Issued by National Weather Service Miami FL
758 AM AST SAT SEP 23 2017

...FLASH FLOOD EMERGENCY FOR ISABELA AND QUEBRADILLAS...

The National Weather Service in San Juan has extended the

* Flash Flood Warning for...
  A Dam Failure in...
  Eastern Isabela Municipality in Puerto Rico...
  Central Quebradillas Municipality in Puerto Rico...

* Until 200 PM AST Saturday

* At 755 AM AST, dam operators continued to report that a failure of 
  the Guajataca Dam is imminent, potentially causing life- 
  threatening flash flooding downstream on the Rio Guajataca River.

The National Weather Service has been running various dam break 
scenarios. Results indicate that a full breach would result in large 
peak flows that would reach the coast in under 12 hours. Flood 
extent mapping of these scenarios keep flows largely within the 
canyon river channel.

This is a FLASH FLOOD EMERGENCY for Eastern Isabela, Western 
Quebradillas, and surrounding areas. Follow the advice of local 
officials regarding evacuations from threatened locations.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Move to higher ground now. This is an extremely dangerous and
life-threatening situation. Do not attempt to travel unless you are
fleeing an area subject to flooding or under an evacuation order.

&&

LAT...LON 1850 6694 1845 6695 1842 6692 1839 6692
      1839 6693 1838 6694 1841 6696 1843 6696
      1845 6698 1850 6697

$$

KScharf

Area Forecast Discussion
National Weather Service San Juan PR
Issued by National Weather Service MIAMI FL
214 PM AST Fri Sep 22 2017

.SHORT TERM...
Deep tropical moisture coupled with a south to southeast flow will
keep precipitable water values well over 2 inches through the
weekend. This will allow for any showers and thunderstorms that do
develop to have the potential for heavy rainfall.

Any additional rainfall that Puerto Rico receives will continue to
aggravate the ongoing flooding on many of the rivers. Also, there
is standing water away from the rivers, in many locations, as
well. Mudslides have occurred across the island and will likely
continue if additional rainfall is received. Thus, in coordination
with the office in San Juan, we will keep the Flash Flood Watch
up across all of Puerto Rico through 8 am. But, the Flash Flood
Watch outside of Puerto Rico will be allowed to expire.

Reiterating, it is difficult to ascertain conditions in the area
as nearly all communications links are down. However, some gauges
continue to report. Some river and stream levels are slowly
falling but still remain in flood.

Heat Index values will begin to rise at or above 100 for the
weekend. This will make recovery efforts difficult and overall
living unpleasant as electricity remains out across the island.

.LONG TERM...
The pattern will change Tuesday into Tuesday night. Flow will
become easterly and precipitable water values will drop to around
1.75 inches. This will bring relatively drier conditions to the
forecast area.

&&

.AVIATION...
South to southeast flow will continue to favor showers and scattered
thunderstorms today over Puerto Rico along with considerable mid to
high level clouds. Highest chance for rain will be in the high
terrain and upslope regime over southern Puerto Rico. The US Virgin
Islands is experiencing a drier airmass with conditions improving.

&&

.MARINE...
Small Craft Advisory will remain in effect over the coastal waters
to the northwest of Puerto Rico because seas will be around 7 feet
in this area. Elsewhere, small craft exercise caution will be
headlined as conditions have improved to below SCA criteria. Showers
and thunderstorms with heavy rain, locally higher winds and
waves, and reduced visibilities will be possible the rest of today
through the weekend.

&&

.PRELIMINARY POINT TEMPS/POPS...
SJU  82  85  82  87 /  20  20  50  50
STT  83  83  83  83 /  20  20  60  50

&&

.SJU WATCHES/WARNINGS/ADVISORIES...
PR...Flash Flood Watch through Saturday morning for Central Interior-
     Eastern Interior-Mayaguez and Vicinity-North Central-
     Northeast-Northwest-Ponce and Vicinity-San Juan and
     Vicinity-Southeast-Southwest-Western Interior.

VI...None.
AM...Flash Flood Watch through Saturday morning for Coastal Waters OF
     Southwestern Puerto Rico out 10 NM-Coastal Waters of
     Southern Puerto Rico out 10 NM.

     Small Craft Advisory until 8 AM AST Saturday for Atlantic Waters
     of Puerto Rico and USVI from 10 NM to 19.5N.

&&

SHORT TERM...MD
MARINE.......MD
AVIATION.....LAK

Hazardous Weather Outlook
National Weather Service San Juan PR
Issued by National Weather Service MIAMI FL
356 PM AST Fri Sep 22 2017

AMZ710>745-PRZ001>013-232000-
San Juan and Vicinity-Northeast-Southeast-Eastern Interior-
North Central-Central Interior-Ponce and Vicinity-Nortwest-
Western Interior-Mayaguez and Vicinity-Southwest-Culebra-Vieques-
The nearshore and off shore Atlantic and Caribbean Coastal Waters-
356 PM AST Fri Sep 22 2017

This Hazardous Weather Outlook is for Puerto Rico and the adjacent
Atlantic Coastal Waters.

.Day One...This Afternoon and Tonight

.Flooding...Flooding continues with occasional heavy rain still
possible.

.Days Two through Seven...Saturday through Thursday

Showers and thunderstorms with south winds will continue into Tuesday.
Easterly trade winds and drier weather will return Tuesday into
Tuesday night.

.Spotter information statement...

Widespread spotter activation is not anticipated, however individual
spotter are encouraged to report flooding and rip currents to the
National Weather Service in San Juan.

AMZ715-725-VIZ001-002-232000-
St. Thomas St. John adjacent Islands-St Croix-
Nearshore Atlantic and adjacent Caribbean Coastal Waters-
356 PM AST Fri Sep 22 2017

This Hazardous Weather Outlook is for the U.S. Virgin Islands and the
ADJACENT Coastal Waters.

.Day One...This Afternoon and Tonight

.Thunderstorms...There is a chance of thunderstorms with heavy
rainfall and brief gusty winds through tonight.

.Days Two through Seven...Saturday through Thursday

Showers and thunderstorms with south winds will continue into Tuesday.
Easterly trade winds and drier weather will return Tuesday into
Tuesday night.

.Spotter information statement...

Widespread spotter activation is not anticipated, however individual
spotter are encouraged to report flooding and rip currents to the
National Weather Service in San Juan.

MD