Tropical Storm Emily developed of a broad rotation tropical wave that moved off of the African coast early in the week of July 24, 2011 and gradually traveled across the tropical Atlantic Ocean. 0W) the National Hurricane Center named the storm and issued the first advisory for Emily at 730 PM AST (2330 UTC) on Monday, August 1, 2011.
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.
Tropical Storm Emily developed of a broad rotation tropical wave that moved off of the African coast early in the week of July 24, 2011 and gradually traveled across the tropical Atlantic Ocean. Based largely on a report from Hurricane Hunter aircraft that a well-defined center had formed 50 miles west-southwest of Dominica (15.2N, 62.0W) the National Hurricane Center named the storm and issued the first advisory for Emily at 730 PM AST (2330 UTC) on Monday, August 1, 2011. It was moving west at 17 mph. A tropical storm warning was then issued for Puerto Rico, Vieques and Culebra, and a tropical storm watch was issued for the U.S. Virgin Islands
Tropical Storm Emily passed near 120 miles south of Ponce during the morning of August 3rd. Outer rain bands associated with the storm produced numerous showers with strong gusty winds across Puerto Rico. The highest wind gust directly recorded was 48 mph at 400 am AST on August 3 (0800 UTC) at the La Parguera Lajas, as Emily was near its closest point to the island.The most affected areas were the southeast and southwest sections of Puerto Rico were 6-10 inches of rain were reported. The heavy rainfall resulted in many mud slides across Puerto Rico, especially where the heaviest rain occurred. Mud slides were reported to block or partially block roads in the eastern municipalities of Canovanas, Fajardo, Ceiba, Naguabo, Las Piedras, Yabucoa, Juncos, Caguas, San Lorenzo, Guayama, Patillas, while the La Plata River flooded portions of Dorado and Toa Baja. Also, trees were blown down in Humacao and Luquillo. Over the western portion of the island flooded roads occurred in Cabo Rojo, Hormigueros, Lajas, Maricao, and Yauco, and a few mud slides also occurred. Trees were reported blown over in San German, Adjuntas, and Utuado.
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 Jul 31, 11:21 PM AST, 5 hours 51 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SAN JUAN PR 1121 PM AST SUN JUL 31 2011 .UPDATE...NO CHANGES NEEDED TO FORECAST GRIDS TONIGHT. PREVIOUS SHIFT HAS A GOOD HANDLE ON ONGOING WEATHER SITUATION. && .AVIATION...PREVAILING VFR CONDS ARE EXPECTED ACROSS ALL TAF SITES OVERNIGHT. HOWEVER ISOLD-SCT SHRA/TSRA WILL DEVELOP AND MOVE WEST OVR LOCAL WATERS BTW VI AND PR. THIS WILL BRING PERIODS OF MVFR TO PARTS OF ERN PR...AS WELL AS TJNR...TJSJ..TISX AND TIST TIL 01/12Z.MTN TOP OBSCURATIONS ALSO PSBL ACROSS E INTERIOR SECTIONS OF PR DUE TO PASSING SHOWERS AND LOW CLDS. && .PREV DISCUSSION... /ISSUED 243 PM AST SUN JUL 31 2011/ SYNOPSIS...BASED ON THE LATEST INFORMATION FROM THE NATIONAL HURRICANE CENTER...A LARGE LOW PRESSURE SYSTEM... CENTERED ABOUT 600 MILES EAST OF THE LESSER ANTILLES THIS AFTERNOON...CONTINUES TO BECOME BETTER ORGANIZED...AND COULD BE CLOSE TO BECOMING A TROPICAL DEPRESSION. THIS SYSTEM IS FORECAST TO CONTINUE TO SLOWLY STRENGTHEN DURING THE NEXT COUPLE OF DAYS AND THEN ENTER THE EASTERN CARIBBEAN LATE TUESDAY OR EARLY WEDNESDAY. IT WILL BRING A SIGNIFICANT INCREASE IN WINDS AND SEAS TO THE LOCAL WATERS BY THE MIDDLE OF NEXT WEEK. DISCUSSION...ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS DEVELOPED OVER THE WESTERN PORTIONS OF PUERTO RICO. ALSO CU LINES DEVELOPED OVER THE ADJACENT ISLANDS GENERATING SHOWERS AND THUNDERSTORM OVER THE EASTERN. MOS OF THESE SHOWERS AND THUNDERSTORMS WILL DISSIPATE AT AROUND SUNSET. A WIND SURGE FEATURE THAT DETACHED FROM THE INVEST 91L IS NOW LOCATED OVER THE LESSER ANTILLES...WILL CONTINUE TO MOVE WEST AT AROUND 20 MPH AND REACH OUR LOCAL FORECAST AREA LATE TONIGHT. GENERATING SHOWERS AND THUNDERSTORMS ACROSS THE LOCAL WATERS...ADJACENT ISLANDS AND EASTERN PORTIONS OF PUERTO RICO. A LOW PRESSURE SYSTEM IS LOCATED ABOUT 575 MILES EAST OF THE LESSER ANTILLES WILL MOVE INTO AN AREA WHERE ENVIRONMENTAL CONDITIONS ARE CONDUCIVE FOR A TROPICAL DEPRESSION TO FORM LATER TODAY OR ON MONDAY. THIS SYSTEM HAS A HIGH CHANCE...NEAR 100 PERCENT...OF BECOMING A TROPICAL CYCLONE DURING THE NEXT 48 HOURS AS IT MOVES WEST-NORTHWESTWARD NEAR 15 MPH. MODELS FORECAST THIS TROPICAL SYSTEM TO BE CLOSE TO OUR LOCAL FORECAST AREA BETWEEN LATE TUESDAY AND WEDNESDAY AFTERNOON. AVIATION...PREVAILING VFR CONDITIONS ARE EXPECTED ACROSS ALL TAF SITES WITH SHRA/TSRA POSSIBLE...MAINLY BEFORE 31/23Z. THESE SHRA/TSRA HAVE BEEN DEVELOPING AND AFFECTING CENTRAL AND WESTERN PORTIONS OF PUERTO RICO. AS A RESULT...TEMPO MVFR CONDITIONS CAN BE EXPECTED ACROSS TJMZ THROUGH AT LEAST 31/23Z. WINDS WILL BE MAINLY FROM THE EAST AT 10 TO 20 KNOTS FROM THE SFC TO 20K FT. MARINE...A WIND SURGE THAT IS MOVING OVER THE LESSER ANTILLES WILL BE REACHING OUR LOCAL WATERS LATE TONIGHT. MARINERS SHOULD EXPECT A SIGNIFICANT INCREASE ON CLOUD AND SHOWER COVERAGE ASSOCIATED TO THIS WEATHER FEATURE. EXPECT GUSTY AND CHOPPY CONDITIONS NEAR SHOWERS AND THUNDERSTORMS. && .PRELIMINARY POINT TEMPS/POPS... SJU 78 90 79 91 / 50 30 20 30 STT 79 90 82 92 / 50 30 30 40 && .SJU WATCHES/WARNINGS/ADVISORIES... PR...NONE. VI...NONE. && 09/71
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SAN JUAN PR 521 AM AST SUN JUL 31 2011 AMZ710>745-PRZ001>013-011000- 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- 521 AM AST SUN JUL 31 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PUERTO RICO AND THE ADJACENT ATLANTIC COASTAL WATERS. .DAY ONE...TODAY AND TONIGHT AVAILABLE MOISTURE WILL COMBINE WITH DAYTIME HEATING AND OROGRAPHIC EFFECTS TO PRODUCE SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS ACROSS SECTIONS OF PUERTO RICO...ESPECIALLY THE CORDILLERA CENTRAL AND WESTERN PUERTO RICO THIS AFTERNOON. PERIODS OF HEAVY RAINFALL MAY CAUSE FLOODING OF STREETS AND LOW LYING AREAS. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY A LARGE AND VIGOROUS TROPICAL WAVE ACCOMPANIED BY AN AREA OF LOW PRESSURE SOME 675 MILES EAST OF THE LESSER ANTILLES ARE GRADUALLY BECOMING BETTER ORGANIZED. THIS DISTURBANCE IS FORECAST TO MOVE WEST NORTHWEST BETWEEN 15 TO 20 MPH DURING THE NEXT FEW DAYS. REGARDLESS OF DEVELOPMENT...THIS ACTIVE WAVE SHOULD APPROACH THE LOCAL REGION LATE TUESDAY...INCREASING THE CHANCES FOR ACTIVE WEATHER ACROSS THE ISLANDS AND REGIONAL WATERS...AS WELL AS THE POTENTIAL FOR HEAVY RAINFALL AND LOCALIZED FLOODING. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY. AMZ715-725-VIZ001-002-011000- ST. THOMAS ST. JOHN ADJACENT ISLANDS-ST CROIX- NEARSHORE ATLANTIC AND ADJACENT CARIBBEAN COASTAL WATERS- 521 AM AST SUN JUL 31 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE U.S. VIRGIN ISLANDS AND THE ADJACENT COASTAL WATERS. .DAY ONE...TODAY AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY A LARGE AND VIGOROUS TROPICAL WAVE ACCOMPANIED BY AN AREA OF LOW PRESSURE SOME 675 MILES EAST OF THE LESSER ANTILLES ARE GRADUALLY BECOMING BETTER ORGANIZED. THIS DISTURBANCE IS FORECAST TO MOVE WEST NORTHWEST BETWEEN 15 TO 20 MPH DURING THE NEXT FEW DAYS. REGARDLESS OF DEVELOPMENT...THIS ACTIVE WAVE SHOULD APPROACH THE LOCAL REGION LATE TUESDAY...INCREASING THE CHANCES FOR ACTIVE WEATHER ACROSS THE ISLANDS AND REGIONAL WATERS...AS WELL AS THE POTENTIAL FOR HEAVY RAINFALL AND LOCALIZED FLOODING. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY.
The San Juan radar (TJUA), 50 km away, was scanning. The volume nearest the first event began at 09:14 UTC.
12 flash flood, 8 debris flow, 1 flood. Local standard time, as filed.
Emergency Management oficials reported Road 3 with intersection with Road 53 impassabale due to Rio Fajardo out of its banks.
A downed tree affected a house located at street 4, Urb. Santa Juanita in the municipality of Guanica.
A downed power pole was reported at Barrio Collores, El Trueno sector in the municipality of Juana Diaz.
Rio Puerto Nuevo was reported out of its banks.
Rio Marin in Patillas was reported overflowing its banks.
Rio Blanco was reported out of its banks affecting Road 31 in the municipality of Naguabo. One person was rescued.
A downed tree fell over power lines at Barrio Ferran in the municipality of Ponce.
Marcelino Gotay, General Valero and Conquistador roads were reported impassable.
A downed tree was reported near a gas station, which made road 123 impassable in the municipality of Adjuntas.
Road 1 near Barrio Beatriz in Caguas was reported impassable.
Road 181 in the municipality of Patillas was reported impassable.
Road 974 and 976 in Fajardo were reported impassable.
A mudslide was reported at Road 3 Km 91.4, Barrio Candelario in the municipality of Humacao.
Road 1, Km 37 at Barrio Beatriz in the municipality was reported impassable due to mudslides.
Downed trees were reported at Barrio Hatillo, Higuera and Toa Vaca close to road 150 in the municipality of Villalba.
Some flooding was reported at Barrio Candelaria in the municipality of Toa Baja.
Roads PR-869,PR-5 and Cucharillas street, Ramal 22 were reported flooded.
Several trees downed were reported at Urb. Bay View in the municipality of Catano.
Rio Blanco was reported out of its banks.
Rio Loco was reported out of its banks at Road PR-368.
Rio Macana at barrio Quebrada Honda was reported out of its banks.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Puerto Rico in 2011Every state in 2011This day in weather historyWarnings in Puerto Rico, August 2011
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: 319738, 319743, 333576, 333582, 319739, 319740, 319742, 319741, 319744, 319746, 319748, 319749, 319750, 319751, 319752, 321991, 321992, 333571, 333574, 333575, 333578.