A very strong tropical wave affect Puerto Rico during the period of August 22-23, 2014. This system brought torrential rainfall which affected mainly the eastern half of Puerto Rico.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS SJU wrote it up.
A very strong tropical wave affect Puerto Rico during the period of August 22-23, 2014. This system brought torrential rainfall which affected mainly the eastern half of Puerto Rico.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS San Juan, PR wrote its last area forecast discussion before the first event at Aug 22, 10:29 AM AST, 1 hour 44 minutes earlier.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN JUAN PR
1029 AM AST FRI AUG 22 2014
.UPDATE...LATEST VISIBLE IMAGES AND DOPPLER RADAR INDICATED AN
AREA OF SHOWERS AND THUNDERSTORMS DEVELOPING OVER THE COASTAL
WATERS OF SOUTHEASTERN PUERTO RICO. A LINE OF HEAVY SHOWERS WITH
THUNDERSTORMS BEGAN TO MOVE INLAND OVER THE SOUTHEAST SECTION OF
PUERTO RICO. URBAN AND SMALL STREAM FLOODING ARE LIKELY TO
OCCUR...AS THIS ACTIVITY INTENSIFIED OVER THAT AREA. ACTIVE
AFTERNOON IS IN STORE FOR PUERTO RICO AND THE U.S. VIRGIN ISLANDS
AS DEEP TROPICAL MOISTURE COMBINE WITH DAYTIME HEATING. REFER TO
LATEST LOCAL FLOOD PRODUCTS FROM THE NATIONAL WEATHER SERVICE IN
SAN JUAN.
&&
.AVIATION...NO CHANGES TO PREVIOUS DISCUSSION AS...VERY ACTIVE PERIOD
IS EXPECTED TO CONTINUE THIS AFTERNOON WITH TSRA THROUGH THE AREA AND LOW
CIGS. WINDS WILL BE FROM THE E-NE...GRADUALLY CHANGING TO
SOUTHEAST THROUGH THE DAY AND GUSTING UP TO 30 KNOTS...ESPECIALLY
NEAR TSRA AS THE LOW PRESSURE PASSES. ALSO...CIGS BELOW FL020 AND
HEAVY RAIN SHALL BE EXPECTED WITH THIS ACTIVITY. PREVAILING MVFR
CONDS ARE EXPECTED WITH PERIODS OF IFR CONDS LIKELY AT TIMES
ACROSS THE LOCAL TERMINALS
&&
.MARINE...SHOWERS AND THUNDERSTORMS WILL MAINTAIN HAZARDOUS MARINE
CONDITIONS THROUGHOUT THE DAY. NO CHANGES TO PREVIOUS DISCUSSION.
&&
.PREV DISCUSSION... /ISSUED 558 AM AST FRI AUG 22 2014/
SYNOPSIS...UPPER LEVEL RIDGE WILL HOLD THROUGH THE WEEKEND AND
THEN WEAKEN THROUGH THE END OF NEXT WEEK. LOW PRES EXPECTED TO
PASS SOUTH OF PR TODAY AND MOVE INTO THE DOMINICAN REPUBLIC SATURDAY.
DISCUSSION...SHOWER AND THUNDERSTORM ACTIVITY ASSOCIATED WITH LOW
PRES SOUTH OF ST. CROIX REMAIN DISORGANIZED. AN ASCAT PASS AT
0157Z DID NOT LONGER SHOW WINDS OF 35 KT AND LATEST INITIALIZATION
FROM NHC HAS DROPPED WINDS TO 30 KT. SO IT IS BECOMING QUITE LIKELY
THAT TROPICAL STORM WARNINGS WILL NOT BE NEEDED FOR THIS EVENT.
HOWEVER...AS WE ALL KNOW HEAVY RAINFALL IS NOT DIRECTLY RELATED
WITH THE INTENSITY OF A TROPICAL CYCLONE. LATEST BLENDED TPW
PRODUCT SHOWS A VERY DEEP MOISTURE PLUME PRESENT OVR THE ERN
CARIBBEAN WITH PWAT VALUES EXCEEDING 2.5 INCHES OR AT THE 99TH
PERCENTILE USING A PWAT CLIMO SINCE 1950. AS LOW PRES MOVES SOUTH
OF PR AND WINDS SHIFT TO THE SOUTHEAST AROUND 15Z EXPECT VERY
INTENSE RAINFALL TO MOVE OVR PR. PERIOD OF MOST INTENSE RAINFALL
IS EXPECTED FROM ABOUT 11 AM TO 5 PM TODAY WITH THE HEAVIEST
ACCUMULATIONS OVER SRN PR AND THE ERN THIRD OF PR WHERE BEST
TOPOGRAPHICAL FORCING IS EXPECTED. IN THESE AREAS RAINFALL TOTALS
COULD EXCEED 10 INCHES. AFTER 00Z SAT...BEST FORCING WILL SHIFT
INTO THE MONA PASSAGE AND THE DOMINICAN REPUBLIC WITH RAINFALL
INTENSITY EXPECTED TO DIMINISH SOMEWHAT BUT RAINS WILL CONTINUE
OFF AND ON THROUGH THE NIGHT ON THE SOUTH COAST. AFTER 12Z
SAT...LOW PRES EXPECTED TO MOVE INTO THE ATLC NORTH OF HISPANIOLA
WITH BOTH MOISTURE AND SFC CONVERGENCE DIMINISHING RAPIDLY THROUGH
THE DAY. EXPECT CONDITIONS TO IMROVE RAPIDLY THROUGH THE DAY BUT
IT WILL STILL REMAIN CLOUDY WITH A RISK OF SOME SHOWERS. MUCH
DRIER WX EXPECTED FOR NEXT WEEK.
AVIATION...VERY ACTIVE PERIOD IS EXPECTED TODAY WITH TSRA THROUGH
THE AREA AND LOW CIGS. WINDS WILL BE FROM THE E-NE...GRADUALLY
CHANGING TO SOUTHEAST THROUGH THE DAY AND GUSTING UP TO 30
KNOTS...ESPECIALLY NEAR TSRA AS THE LOW PRESSURE PASSES.
ALSO...CIGS BELOW FL020 AND HEAVY RAIN SHALL BE EXPECTED WITH THIS
ACTIVITY. PREVAILING MVFR CONDS ARE EXPECTED WITH PERIODS OF IFR
CONDS LIKELY AT TIMES ACROSS THE LOCAL TERMINALS.
MARINE...WINDS 20-25 KT AND SEAS 7-9 FT ESPECIALLY OVER ATLC
WATERS WHERE PRES GRADIENT IS TIGHTEST. WINDS AND WAVES HIGHER
NEAR THUNDERSTORMS.
HYDROLOGY...TODAY'S EXPECTED HEAVY RAINFALL EVENT APPEARS TO BE
A LONGER DURATION EVENT THAN DURING TS BERTHA AND MOISTURE PLUME
IS ALSO DEEPER WITH THE FOCUS OF HEAVIEST RAINFALL THIS TIME
AROUND OVER ERN THIRD AND SRN PR WHERE RIVERS TEND TO RESPOND A
LOT QUICKER. ALSO...SOIL MOISTURE IS SIGNIFICANTLY HIGHER THIS
TIME AROUND THAN DURING BERTHA MEANING THAT GROUND WILL BE ABLE TO
ABSORB LESS WATER AND MORE WATER WILL TURN INTO RUNOFF WHICH
INCREASES THE RISK FOR MORE FLOODING. RELUCTANT TO GO ANY HIGHER
IN RAINFALL AMOUNTS THAN WHAT WE ALREADY HAVE IN THE FCST DUE TO
THE LACK OF ORGANIZATION OF THE SYSTEM BUT BELIEVE RAINFALL TOTALS
FOR SRN AND ERN PR WILL BE CLOSER TO 10 INCHES WHEN THE RAIN IS
DONE SAT MORNING.
&&
.PRELIMINARY POINT TEMPS/POPS...
SJU 85 80 85 77 / 100 80 80 30
STT 82 81 82 79 / 100 80 80 40
&&
.SJU WATCHES/WARNINGS/ADVISORIES...
PR...FLASH FLOOD WATCH THROUGH SATURDAY 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.
VI...FLASH FLOOD WATCH THROUGH SATURDAY MORNING FOR ST CROIX-ST.
THOMAS/ST. JOHN/ADJACENT ISLANDS.
COASTAL WATERS...
SMALL CRAFT ADVISORY UNTIL 4 PM AST THIS AFTERNOON FOR COASTAL
WATERS OF NORTHWESTERN PUERTO RICO OUT 10 NM-COASTAL WATERS
OF SOUTHERN PUERTO RICO OUT 10 NM.
SMALL CRAFT ADVISORY UNTIL 3 PM AST SATURDAY FOR ANEGADA PASSAGE
SOUTHWARD TO 17N-ATLC WATERS OF PUERTO RICO AND USVI FROM
10NM TO 19.5N-CARIBBEAN WATERS OF PUERTO RICO FROM 10 NM TO
17N-MONA PASSAGE SOUTHWARD TO 17N.
SMALL CRAFT ADVISORY UNTIL 9 PM AST THIS EVENING FOR COASTAL
WATERS OF NORTHERN PUERTO RICO OUT 10 NM.
SMALL CRAFT ADVISORY UNTIL 9 AM AST SATURDAY FOR COASTAL WATERS
OF NORTHERN USVI AND CULEBRA OUT 10 NM-COASTAL WATERS OF
SOUTHERN USVI VIEQUES AND EASTERN PUERTO RICO OUT 10 NM.
&&
23/71HAZARDOUS WEATHER OUTLOOK...CORRECTED NATIONAL WEATHER SERVICE SAN JUAN PR 613 AM AST FRI AUG 22 2014 AMZ710>745-PRZ001>013-231015- 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- 613 AM AST FRI AUG 22 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PUERTO RICO AND THE ADJACENT ATLANTIC COASTAL WATERS. .DAY ONE...TODAY AND TONIGHT HEAVY RAIN EXPECTED TODAY AND TONIGHT WITH POTENTIAL FOR URBAN AND FLASH FLOODING. PLEASE REFER TO FLASH FLOOD WATCH FOR DETAILS. HAZARDOUS MARINE CONDITIONS THROUGH THE DAY. PLEASE REFER TO MARINE WEATHER MESSAGE FOR DETAILS. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY DUE TO ALREADY SATURATED SOILS...PROLONGED PERIODS OF HEAVY RAINFALL WILL LIKELY RESULT IN RAPID RISES ON RIVERS...SMALL STREAMS AND CREEKS AS WELL AS INCREASE THE POTENTIAL FOR MUDSLIDES IN AREAS OF STEEP TERRAIN. .SPOTTER INFORMATION STATEMENT...REPORTS ABOUT FLOODS WOULD BE APPRECIATED. AMZ715-725-VIZ001-002-231015- ST. THOMAS ST. JOHN ADJACENT ISLANDS-ST CROIX- NEARSHORE ATLANTIC AND ADJACENT CARIBBEAN COASTAL WATERS- 613 AM AST FRI AUG 22 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE U.S. VIRGIN ISLANDS AND THE ADJACENT COASTAL WATERS. .DAY ONE...TODAY AND TONIGHT HEAVY RAIN EXPECTED TODAY AND TONIGHT WITH POTENTIAL FOR URBAN AND FLASH FLOODING. PLEASE REFER TO FLASH FLOOD WATCH FOR DETAILS. HAZARDOUS MARINE CONDITIONS THROUGH THE DAY. PLEASE REFER TO MARINE WEATHER MESSAGE FOR DETAILS. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY DUE TO ALREADY SATURATED SOILS...PROLONGED PERIODS OF HEAVY RAINFALL WILL LIKELY RESULT IN RAPID RISES ON SMALL STREAMS AND CREEKS AS WELL AS INCREASE THE POTENTIAL FOR MUDSLIDES IN AREAS OF STEEP TERRAIN. .SPOTTER INFORMATION STATEMENT...REPORTS ABOUT FLOODS WOULD BE APPRECIATED.
The San Juan radar (TJUA), 50 km away, was scanning. The volume nearest the first event began at 16:12 UTC.
12 flash flood, 3 flood, 2 heavy rain, 1 thunderstorm wind. Local standard time, as filed.
The road PR-3 was reported as flooded due to R o Fajardo out of its banks.
The road PR-194 was reported flooded near Urb. Santa Rita.
River out of its banks at Barrio Mar n in Patillas.
A mudslide was reported at road PR-173, at 6.4 kilometers between Guaynabo and Aguas Buenas.
R o Grande de Lo za in San Lorenzo went out of its banks over a low bridge.
Guayan’s river was reported as out of its banks at barrio Calabazas in Yabucoa.
A river was reported as out of its banks at Borinquen sector.
A mudslide was reported over road PR-1 intersection with road PR-7722 in Cayey.
A tree fell over road PR-183, Km 2.2 at Barrio Tomas de Castro.
Rio Caguitas was reported out of its banks.
Real Anon sector at Corral Falso a road was reported flooded.
Mcleary avenue at Ocean Park was reported flooded.
Urban flooding was reported at Downtown Santa Isabel.
Highway PR-1 and PR-2 were reported flooded in Ponce. Rio Inabon also was reported out of its banks.
Rio Loco was reported out of its banks. Route PR-121 was flooded and closed.
Rio Loco was reported out of its banks. Route PR-121 was flooded and closed.
Lago Luchetti was reported out of its banks. People were evacuated in Luchetti sector by Emergency Personnel.
Vivi and Caonillas Rivers were out of its banks impacting route PR-111.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Puerto Rico in 2014Every state in 2014This day in weather historyWarnings in Puerto Rico, August 2014
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 537612, 537613, 537626, 537666, 537669, 537671, 537674, 537675, 539330, 539336, 539358, 539359, 539360, 539361, 539362, 539363, 539364, 539366.