Alert archive / Puerto Rico / Areal Flood Warnings in 2012

Areal Flood Warning 7, NWS JSJ

March 28, 2012

NWS JSJ issued this areal flood warning at Mar 28, 2012, 6:52 PM CDT. It was in force for 21 hr. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Mar 28, 2012, 6:52 PM CDT (23:52 UTC)
Expired: Mar 29, 2012, 3:45 PM CDT
In force: 21 hr
Issued by: NWS JSJ
Area: Storm-based polygon
Flood severity: None

The radar

The San Juan radar (TJUA), 58 km from the middle of the area, began a volume at 23:53 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
Mar 29, 4:32 AM CDT	FLASH FLOOD	Manati, PR	ROAD PR-2, KM 50 WAS CLOSED DUE TO RIO MANATI OUT OF ITS BANKS.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The text

As transmitted, in the capitals the NWS used until 2016.

301 
WGCA42 TJSJ 282352
FLWSJU

BULLETIN - EAS ACTIVATION REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE SAN JUAN PR
752 PM AST WED MAR 28 2012

PRC017-091-291145-
/O.NEW.TJSJ.FA.W.0007.120328T2352Z-120329T1145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BARCELONETA PR-MANATI PR-
752 PM AST WED MAR 28 2012

THE NATIONAL WEATHER SERVICE IN SAN JUAN HAS ISSUED A

* FLOOD WARNING FOR...
  BARCELONETA MUNICIPALITY IN PUERTO RICO...
  THIS INCLUDES THE CITY OF BARCELONETA...
  MANATI MUNICIPALITY IN PUERTO RICO...
  THIS INCLUDES THE CITY OF MANATI...

* UNTIL 745 AM AST THURSDAY

* AT 751 PM AST RUNOFF FROM PREVIOUS HEAVY RAINFALL HAS RESULTED IN 
SIGNIFICANT RISES ON RIO GRANDE DE MANATI AT MANATI. AT 750 PM 
AST...U.S.G.S. RIVER RAIN GAGES ALONG RIO GRANDE DE MANATI  
INDICATED THAT THE RIVER LEVEL WAS WELL ABOVE THE FLOOD STAGE. 
MOTORISTS DRIVING ALONG THE RIO GRANDE DE MANATI IN FLOOD PRONE 
AREAS SHOULD EXERCISE EXTREME CAUTION. MOVE TO HIGHER GROUND 
IMMEDIATELY AND NEVER TRY TO CROSS A FLOODED ROADWAY. 

A FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR HAS BEEN REPORTED.
STREAM RISES WILL BE SLOW AND FLASH FLOODING IS NOT EXPECTED.
HOWEVER...ALL INTERESTED PARTIES SHOULD TAKE NECESSARY PRECAUTIONS
IMMEDIATELY.

LAT...LON 1848 6649 1838 6646 1837 6651 1843 6655
      1849 6655

$$

EM

3 follow-up statements

523 
WGCA42 TJSJ 291102
FLWSJU

BULLETIN - EAS ACTIVATION REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE SAN JUAN PR
702 AM AST THU MAR 29 2012

PRC017-091-291745-
/O.EXT.TJSJ.FA.W.0007.000000T0000Z-120329T1745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BARCELONETA PR-MANATI PR-
702 AM AST THU MAR 29 2012

THE NATIONAL WEATHER SERVICE IN SAN JUAN HAS EXTENDED THE

* FLOOD WARNING FOR...
  BARCELONETA MUNICIPALITY IN PUERTO RICO...
  THIS INCLUDES THE CITY OF BARCELONETA...
  MANATI MUNICIPALITY IN PUERTO RICO...
  THIS INCLUDES THE CITY OF MANATI...

* UNTIL 145 PM AST THURSDAY

* AT 700 AM AST RIO DE MANATI AT MANATI WAS AT 32.61 FEET WHERE 
FLOOD STAGE WAS 25 FEET. THE RIVER IS EXPECTED TO SUBSIDE VERY 
SLOWLY.

* FLOODING IS EXPECTED FROM JUST UPSTREAM FROM MANATI TO THE 
ATLANTIC OCEAN.

A FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR HAS BEEN REPORTED.
STREAM RISES WILL BE SLOW AND FLASH FLOODING IS NOT EXPECTED.
HOWEVER...ALL INTERESTED PARTIES SHOULD TAKE NECESSARY PRECAUTIONS
IMMEDIATELY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. 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 1848 6649 1838 6646 1837 6651 1843 6655
      1849 6655

$$

SNELL

097 
WGCA42 TJSJ 291743
FLWSJU

BULLETIN - EAS ACTIVATION REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE SAN JUAN PR
143 PM AST THU MAR 29 2012

PRC017-091-292045-
/O.EXT.TJSJ.FA.W.0007.000000T0000Z-120329T2045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BARCELONETA PR-MANATI PR-
143 PM AST THU MAR 29 2012

THE NATIONAL WEATHER SERVICE IN SAN JUAN HAS EXTENDED THE

* FLOOD WARNING FOR...
  BARCELONETA MUNICIPALITY IN PUERTO RICO...
  THIS INCLUDES THE CITY OF BARCELONETA...
  MANATI MUNICIPALITY IN PUERTO RICO...
  THIS INCLUDES THE CITY OF MANATI...

* UNTIL 445 PM AST

* AT 140 PM AST RIO DE MANATI AT MANATI WAS AT 25.55 FEET WHERE 
FLOOD STAGE WAS 25 FEET. THE RIVER IS EXPECTED TO SUBSIDE VERY 
SLOWLY. ALSO...MODERATE TO HEAVY RAIN WAS FALLING AT THE HEADWATERS 
OF THE RIO GRANDE DE MANATI WHICH WILL SLOW THE RECESSION. THEREFORE 
THE FLOOD WARNING HAS BEEN EXTENDED UNTIL 445 PM AST.

A FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR HAS BEEN REPORTED.
STREAM RISES WILL BE SLOW AND FLASH FLOODING IS NOT EXPECTED.
HOWEVER...ALL INTERESTED PARTIES SHOULD TAKE NECESSARY PRECAUTIONS
IMMEDIATELY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. 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.

A FLOOD WARNING MEANS FLOODING IS OCCURRING OR IS IMMINENT. MOST
FLOOD RELATED DEATHS OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS
WATER COVERED BRIDGES...DIPS...OR LOW WATER CROSSINGS. NEVER TRY TO
CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT. TO ESCAPE RISING
WATER MOVE UP TO HIGHER GROUND.

&&

LAT...LON 1848 6649 1838 6646 1837 6651 1843 6655
      1849 6655

$$

CASTRO

012 
WGCA82 TJSJ 292044
FLSSJU

FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN JUAN PR
444 PM AST THU MAR 29 2012

PRC017-091-292052-
/O.EXP.TJSJ.FA.W.0007.000000T0000Z-120329T2045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BARCELONETA PR-MANATI PR-
444 PM AST THU MAR 29 2012

...THE FLOOD WARNING WILL EXPIRE AT 445 PM AST FOR MANATI AND
BARCELONETA MUNICIPALITIES...

RESIDENTS AND MOTORISTS ACROSS THESE AREAS SHOULD HOWEVER BE ALERT TO
PONDING OF WATER ON ROADWAYS AND ALLOW TIME FOR STREAMS...CREEKS AND
RIVERS TO RETURN TO NORMAL LEVELS.

LAT...LON 1848 6649 1838 6646 1837 6651 1843 6655
      1849 6655

$$

OMS

ADDITIONAL INFORMATION CAN BE FOUND AT /USE LOWER CASE LETTERS/:
     HTTP://WWW.WEATHER.GOV/SANJUAN

What forecasters said that day

The local office's own words before this areal flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS JSJ wrote its last area forecast discussion before this areal flood warning went out at Mar 28, 2:02 PM CDT, 4 hours 50 minutes earlier.

Area forecast discussion, Mar 28, 2:02 PM CDT, 4 hours 50 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN JUAN PR
302 PM AST WED MAR 28 2012

.SYNOPSIS...UPPER LEVEL TROUGH WILL CONTINUE ACROSS THE REGION
DURING THE NEXT FEW DAYS. HIGH PRESSURE AT THE SURFACE WILL BUILD
ACROSS THE WESTERN ATLANTIC TOMORROW. COLD FRONT WILL STALL JUST
NORTH OF THE AREA.

&&

.DISCUSSION...UNSTABLE ATMOSPHERIC CONDITIONS PREVAILED ACROSS
PUERTO RICO THIS AFTERNOON...WITH A PERSISTENT UPPER LEVEL TROUGH
DOMINATING THE NORTHEAST CARIBBEAN. THIS FEATURE IN COMBINATION
WITH DAYTIME HEATING AND SEA BREEZE CONVERGENCE...ENHANCE THE
DEVELOPMENT OF SHOWERS AND THUNDERSTORMS MAINLY ACROSS THE
SOUTHERN SLOPES OF PUERTO RICO. WINDS BETWEEN 0-3 KM AGL ARE
MAINLY FROM THE NORTHEAST WHICH WILL MAINTAIN THE FOCUS OF HEAVY
RAINFALL BETWEEN THE CORDILLERA CENTRAL AND THE SOUTHERN SLOPES
OF PUERTO RICO THROUGHOUT THE AFTERNOON. THE STORM MOTION OF THESE
SHOWERS WILL BE VERY SLOW...THEREFORE...HIGH RAINFALL ACCUMULATION
WILL BE EXPECTED.

A HIGH PRESSURE SYSTEM AT THE SURFACE WILL BUILD ACROSS THE
WESTERN ATLANTIC TOMORROW...INDUCING A NORTHEAST TRADE WIND
FLOW. THIS FLOW WILL ALLOW FOR FASTER MOVEMENT OF THE SHOWER
ACTIVITY. A COLD FRONT WILL STALL JUST NORTHERN OF THE AREA AND IS
NOT EXPECTED TO AFFECT THE LOCAL AREA. HOWEVER...PATCHES OF LOW
LEVEL MOISTURE ASSOCIATED FROM THIS SYSTEM WILL AFFECT THE NORTH COAST
OF PUERTO RICO TONIGHT AND EARLY THURSDAY MORNING. CONDITIONS
REMAINS MOIST AND UNSTABLE DURING THE WEEKEND AS WINDS SHIFT SOUTHEAST
AND GOOD CHANCES FOR SHOWER EVERY AFTERNOON PREVAILS.

&&

.AVIATION...MVFR CONDITIONS WITH MOUNTAIN OBSCURATIONS EXPECTED
TO PREVAIL ACROSS TJMZ AND TJPS THROUGH AT LEAST 28/22Z IN
SHRA/TSRA. VFR CONDITIONS WILL PREVAIL ELSEWHERE.

&&

.MARINE...SEAS 3-5 FT RIGHT NOW IN PREDOMINANT WIND WAVES BUT A
SMALL NE SWELL IS NOW BEING OBSERVED AT BUOYS 41043 AND 41053.
SEAS EXPECTED TO BUILD RAPIDLY TOMORROW IN NORTH SWELLS WITH
SMALL CRAFT AND HIGH SURF CONDITIONS LIKELY.

&&

.PRELIMINARY POINT TEMPS/POPS...
SJU  73  84  73  83 /  50  50  50  50
STT  74  84  75  84 /  50  50  50  50

&&

.SJU WATCHES/WARNINGS/ADVISORIES...
PR...NONE.
VI...NONE.
COASTAL WATERS...SMALL CRAFT ADVISORY FROM 9 AM THURSDAY TO 3 AM AST SATURDAY FOR
     ATLC WATERS OF PUERTO RICO AND USVI FROM 10NM TO 19.5N.

&&

64/71

Hazardous weather outlook, Mar 28, 4:05 AM CDT, 14 hours 47 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SAN JUAN PR
505 AM AST WED MAR 28 2012

AMZ710>745-PRZ001>013-290915-
SAN JUAN AND VICINITY-NORTHEAST-SOUTHEAST-EASTERN INTERIOR-
NORTH CENTRAL-CENTRAL INTERIOR-PONCE AND VICINITY-NORTHWEST-
WESTERN INTERIOR-MAYAGUEZ AND VICINITY-SOUTHWEST-CULEBRA-VIEQUES-
THE NEARSHORE AND OFF SHORE ATLANTIC AND CARIBBEAN COASTAL WATERS-
505 AM AST WED MAR 28 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PUERTO RICO AND THE ADJACENT
ATLANTIC COASTAL WATERS.

.DAY ONE...TODAY AND TONIGHT
PERIODS OF MODERATE TO LOCALLY HEAVY RAINFALL WILL REMAIN POSSIBLE
ESPECIALLY ACROSS THE INTERIOR SECTIONS OF PUERTO RICO AND ALONG THE
CORDILLERA CENTRAL THIS AFTERNOON. THE SHOWERS AND THUNDERSTORMS
WILL MOVE VERY SLOWLY...PRODUCING HIGH RAINFALL ACCUMULATIONS
ALONG THE CORDILLERA CENTRAL EARLY IN THE AFTERNOON AND ACROSS
SOUTHERN AND SOUTHWESTERN SECTIONS OF PUERTO RICO LATE IN THE
AFTERNOON AND EARLY IN THE EVENING. THIS SCENARIO WILL RESULT IN QUICK
RISES IN RIVERS...STREAMS AND CREEKS...AS WELL AS INCREASE THE
POTENTIAL FOR URBAN FLOODING. ALSO...THE THREAT OF MUDSLIDES WILL
ALSO CONTINUE IN AREAS OF STEEP TERRAIN WHERE SIGNIFICANT RAINFALL
HAS OCCURRED IN RECENT DAYS.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

NO HAZARDOUS WEATHER ANTICIPATED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

ANY REPORTS OF SIGNIFICANT WEATHER OR FLOOD PROBLEMS WOULD BE
GREATLY APPRECIATED.

AMZ715-725-VIZ001-002-290915-
ST. THOMAS ST. JOHN ADJACENT ISLANDS-ST CROIX-
NEARSHORE ATLANTIC AND ADJACENT CARIBBEAN COASTAL WATERS-
505 AM AST WED MAR 28 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE U.S. VIRGIN ISLANDS AND THE
ADJACENT COASTAL WATERS.

.DAY ONE...TODAY AND TONIGHT

NO HAZARDOUS WEATHER ANTICIPATED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

NO HAZARDOUS WEATHER ANTICIPATED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED.

The office that day

Everything else NWS JSJ issued on the same UTC day.

Issued	Product	Office	Lasted
Mar 27, 8:07 PM CDT	Areal Flood Advisory	JSJ	5 hr
Mar 27, 9:50 PM CDT	Areal Flood Warning	JSJ	3 hr
Mar 28, 3:31 AM CDT	Small Craft Advisory	JSJ	59 hr
Mar 28, 12:58 PM CDT	Areal Flood Advisory	JSJ	111 min
Mar 28, 1:42 PM CDT	Areal Flood Advisory	JSJ	3 hr
Mar 28, 2:45 PM CDT	Areal Flood Advisory	JSJ	5 hr
Mar 28, 3:53 PM CDT	Areal Flood Advisory	JSJ	3 hr
Mar 28, 4:04 PM CDT	Areal Flood Advisory	JSJ	3 hr
Mar 28, 5:04 PM CDT	Areal Flood Advisory	JSJ	116 min
Mar 28, 5:10 PM CDT	Flash Flood Warning	JSJ	3 hr
Mar 28, 5:33 PM CDT	Areal Flood Advisory	JSJ	117 min
Mar 28, 6:07 PM CDT	Areal Flood Advisory	JSJ	2 hr
Mar 28, 6:33 PM CDT	Areal Flood Advisory	JSJ	3 hr

Nearby

Areal Flood Warnings in Puerto Rico, 2012 Every areal flood warning in 2012

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; radar from the NEXRAD Level II archive.