Flash Flood Warning 109, NWS JSJ

659 
WGCA72 TJSJ 211453
FFSSJU

Flash Flood Statement
National Weather Service San Juan PR
Issued by National Weather Service Miami FL
1053 AM AST THU SEP 21 2017

PRC001-013-017-019-039-043-047-054-065-073-075-081-091-101-107-111-
113-133-141-143-145-149-211600-
/O.CON.TJSJ.FF.W.0109.000000T0000Z-170921T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lares PR-Florida PR-Coamo PR-Ponce PR-Morovis PR-Vega Alta PR-
Arecibo PR-Orocovis PR-Adjuntas PR-Villalba PR-Vega Baja PR-
Barceloneta PR-Barranquitas PR-Jayuya PR-Ciales PR-Hatillo PR-
Corozal PR-Utuado PR-Juana Diaz PR-Santa Isabel PR-Manati PR-
Penuelas PR-
1053 AM AST THU SEP 21 2017

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL NOON AST FOR
SOUTHEASTERN LARES...FLORIDA...NORTHWESTERN COAMO...PONCE...
MOROVIS...WESTERN VEGA ALTA...ARECIBO...OROCOVIS...ADJUNTAS...
VILLALBA...WESTERN VEGA BAJA...BARCELONETA...NORTHWESTERN
BARRANQUITAS...JAYUYA...CIALES...NORTHEASTERN HATILLO...SOUTHWESTERN
COROZAL...UTUADO...JUANA DIAZ...NORTHWESTERN SANTA ISABEL...MANATI
AND EASTERN PENUELAS MUNICIPALITIES...

At 1053 AM AST, satellite estimates indicated heavy rain over the
warned area. Flash flooding is already occurring.

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.

Some locations that will experience flooding include...
Ponce, Arecibo, Jayuya, Adjuntas, Villalba, Ciales, Morovis, Florida,
Manati, Utuado, Barceloneta, Orocovis, Juana Diaz, Pajonal, Coto
Laurel, La Alianza, Barahona, Franquez, Guayabal and Potala Pastillo.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.

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 1851 6643 1838 6645 1836 6637 1833 6637
      1824 6633 1817 6638 1817 6643 1802 6642
      1796 6647 1795 6660 1797 6671 1799 6669
      1809 6668 1813 6670 1819 6684 1832 6681
      1832 6677 1849 6678 1849 6671

$$

RAG

346 
WGCA52 TJSJ 211550
FFWSJU
PRC001-013-017-019-039-043-047-054-065-073-075-081-091-101-107-111-
113-133-141-143-145-149-211900-
/O.EXT.TJSJ.FF.W.0109.000000T0000Z-170921T1900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service San Juan PR
Issued by National Weather Service Miami FL
1150 AM AST THU SEP 21 2017

The National Weather Service in San Juan has extended the

* Flash Flood Warning for...
  Southeastern Lares Municipality in Puerto Rico...
  Florida Municipality in Puerto Rico...
  Northwestern Coamo Municipality in Puerto Rico...
  Ponce Municipality in Puerto Rico...
  Morovis Municipality in Puerto Rico...
  Western Vega Alta Municipality in Puerto Rico...
  Arecibo Municipality in Puerto Rico...
  Orocovis Municipality in Puerto Rico...
  Adjuntas Municipality in Puerto Rico...
  Villalba Municipality in Puerto Rico...
  Western Vega Baja Municipality in Puerto Rico...
  Barceloneta Municipality in Puerto Rico...
  Northwestern Barranquitas Municipality in Puerto Rico...
  Jayuya Municipality in Puerto Rico...
  Ciales Municipality in Puerto Rico...
  Northeastern Hatillo Municipality in Puerto Rico...
  Southwestern Corozal Municipality in Puerto Rico...
  Utuado Municipality in Puerto Rico...
  Juana Diaz Municipality in Puerto Rico...
  Northwestern Santa Isabel Municipality in Puerto Rico...
  Manati Municipality in Puerto Rico...
  Eastern Penuelas Municipality in Puerto Rico...

* Until 300 PM AST

* At 1149 AM AST, satellite estimates indicated additional heavy 
  rain is about to spread across the warned area. Flash flooding is 
  already occurring.

* Some locations that will experience flooding include...
  Ponce, Arecibo, Jayuya, Adjuntas, Villalba, Ciales, Morovis,
  Florida, Manati, Utuado, Barceloneta, Orocovis, Juana Diaz,
  Pajonal, Coto Laurel, La Alianza, Barahona, Franquez, Guayabal and
  Potala Pastillo.

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...

In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.

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 1851 6643 1838 6645 1836 6637 1833 6637
      1824 6633 1817 6638 1817 6643 1802 6642
      1796 6647 1795 6660 1797 6671 1799 6669
      1809 6668 1813 6670 1819 6684 1832 6681
      1832 6677 1849 6678 1849 6671

$$

RAG

Area Forecast Discussion
National Weather Service San Juan PR
535 AM AST Thu Sep 21 2017

.DISCUSSION...As of 5 am, Hurricane Maria was located around 70
miles north of Punta Cana in the Dominican Republic. The
hurricane is expected to continue to move further away from Puerto
Rico and USVI today, with the strongest winds gradually
diminishing across the region later this morning. However, breezy
southerly conditions will continue into at least this evening,
and likely continue across the higher elevations through the day
on Friday.

The persistent heavy rainbands that have been lashing the western
side of PR overnight are expected to also lift north and west of
the island later this morning. While some areas may see a break in
precip, especially this morning, the concern for the remainder of
the day, and through the next few days, will be for more heavy
rainfall. Deep tropical moisture remains across the region, which
in combination with the southerly flow will lead to enhanced
rainfall along the southern slopes of PR, and across the south
side of the St Thomas/St John. Coverage and rainfall amounts are
likely to be higher during the afternoon/evening as less cloud
cover promotes some diurnal enhancement.

Any additional rainfall will aggravate the ongoing record
flooding along most of the rivers . While breaks in the rain may
allow for a brief respite, expect additional rapid rises with any
rainfall along with mudslides. Currently the Flash Flood Watch
continues through Friday afternoon, but may need to be extended if
the flow pattern holds through the weekend.

The Atlantic ridge begins to rebuild into mid next week, allowing
for a re-establishment of easterly trades. Models are in
agreement in showing a SAL layer arriving by Wednesday, which
should lead to much lower shower activity, potentially isolated at
best.

&&

.AVIATION...Hurricane Maria will gradually pull away to the
northeast through Thursday with conditions slowly improving. Still
widespread MVFR with IFR/LIFR likely in heavier showers,
especially across the Puerto Rico terminals. Winds gusting to 40
kts at times will ease and much lighter wind speeds expected by
Thursday evening. USVI terminals will see conditions improving
more rapidly with more scattered showers possible through the
period. AMD NOT SKED remains for all terminals, continue to check
with authorities for airport closures.

&&

.MARINE...Hurricane Maria will continue moving away from the
local waters allowing the ongoing tropical storm force winds with
occasional hurricane force gusts to subside in the the waters
northwest of Puerto Rico and in the northern Mona Passage by late
morning. Elsewhere a Small Craft Advisory is in effect with south
winds of 20 to 30 knots slowly lessening late this evening. More
moderate south-southeast flow is expected through the weekend with
seas continuing to subside.

Showers with periodic thunderstorms with heavy rain and locally
higher winds and waves are possible through this weekend.

&&

.PRELIMINARY POINT TEMPS/POPS...
SJU  83  77  88  78 /  40  20  30  30
STT  82  81  85  80 /  50  80  80  50

&&

.SJU WATCHES/WARNINGS/ADVISORIES...
PR...Flash Flood Watch through Friday afternoon 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.

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

     Small Craft Advisory until 2 PM AST this afternoon for
     St.Thomas...St. John...and Adjacent Islands.

AM...Hurricane Warning for Atlantic Waters of Puerto Rico and USVI
     from 10 NM to 19.5N-Mona Passage Southward to 17N.

	 Small Craft Advisory until 2 PM AST this afternoon for
     Anegada Passage Southward to 17N-Caribbean Waters of Puerto Rico
	 from 10 NM to 17N-Coastal Waters OF Northwestern Puerto Rico out
	 10 NM- Coastal Waters OF Southwestern Puerto Rico out 10 NM-
	 Coastal Waters of Northern Puerto Rico out 10 NM- Coastal Waters
	 of Northern USVI and Culebra 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.
&&

ALM/JDW

Hazardous Weather Outlook
National Weather Service San Juan PR
Issued by National Weather Service MIAMI FL
507 AM AST Thu Sep 21 2017

AMZ710>745-PRZ001>013-220915-
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-
507 AM AST Thu Sep 21 2017

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

.Day One...Today and Tonight

...A hurricane warning remains in effect for the offshore Atlantic
Waters and the Mona Passage...

...A small craft advisory is in effect for all near shore and coastal
waters...

...A flash flood watch remains in effect...

AMZ715-725-VIZ001-002-220915-
St. Thomas St. John adjacent Islands-St Croix-
Nearshore Atlantic and adjacent Caribbean Coastal Waters-
507 AM AST Thu Sep 21 2017

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

.Day One...Today and Tonight

.Days Two through Seven...Friday through Wednesday

...A flash flood watch remains in effect...

..A small craft advisory is in effect for all waters...

JDW