The combination of a mid level shortwave trough moving through the Northeast and a weak surface trough of low pressure in the region triggered scattered showers and thunderstorms across the tri-state area. Winds aloft were weak and resulted in slow moving storms, which produced heavy downpours and caused flash flooding in Bergen County.
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 OKX wrote it up.
The combination of a mid level shortwave trough moving through the Northeast and a weak surface trough of low pressure in the region triggered scattered showers and thunderstorms across the tri-state area. Winds aloft were weak and resulted in slow moving storms, which produced heavy downpours and caused flash flooding in Bergen County.
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 New York, NY wrote its last area forecast discussion before the first event at Sep 1, 6:30 AM EST, 2 hours 25 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NEW YORK NY 730 AM EDT SUN SEP 1 2013 .SYNOPSIS... A WEAK TROUGH OF LOW PRESSURE WILL BE IN THE VICINITY TODAY THROUGH MONDAY. A COLD FRONT ENTERS FROM THE WEST MONDAY NIGHT AND SLOWLY TRACKS ACROSS THE AREA THROUGH TUESDAY. HIGH PRESSURE THEN REMAINS IN CONTROL OF THE WEATHER FOR THE REST OF THE WEEK WITH ONLY A WEAK COLD FRONT MOVING THROUGH ON THURSDAY. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... MINOR CHANGES THIS UPDATE. FORECAST APPEARS ON TRACK. A SURFACE TROUGH OF LOW PRESSURE WILL REMAIN IN THE AREA TODAY. MEANWHILE...LOW-MID LEVEL SHORTWAVE ENERGY SLOWLY TRACKS THROUGH THE FORECAST AREA. WITH SUFFICIENT CAPE IN PLACE...SCATTERED SHOWERS AND TSTMS EXPECTED. FORECAST SOUNDINGS SHOW WEAK WINDS ALOFT THROUGH THE MID LEVELS...SO WHILE THE THREAT OF SEVERE THUNDERSTORMS WILL BE LOW AS A RESULT...STORM CELLS WILL TRACK SLOWLY. FLOODING IS THEREFORE A CONCERN WITH AT LEAST A LOW-END CHANCE OF FLASH FLOODING. DUE TO THE SCATTERED NATURE OF PRECIP...A FLASH FLOOD WATCH WILL NOT BE ISSUED. PLEASE SEE THE HYDROLOGY SECTION FOR MORE DETAILS. MAV AND NAM MOS NUMBERS FOR HIGH TEMPS WERE SIMILAR AND A BLEND OF THE TWO WAS USED. HIGHS ABOVE NORMAL. THERE IS A MODERATE RISK OF RIP CURRENTS AT THE ATLANTIC OCEAN BEACHES TODAY INTO THIS EVENING. && .SHORT TERM /6 PM THIS EVENING THROUGH MONDAY NIGHT/... SURFACE TROUGH AND ADDITIONAL SHORTWAVES REMAIN IN THE AREA TONIGHT AND MONDAY. SCATTERED COVERAGE OF SHOWERS AND TSTMS THIS EVENING BECOMES MORE NUMEROUS LATE TONIGHT INTO MONDAY. A TRAILING COLD FRONT BEGINS TO MOVE THROUGH MONDAY NIGHT AND SHOULD BE JUST EAST OF THE CITY BY DAYBREAK ON TUESDAY. AGAIN...WHILE SEVERE STORMS ARE NOT LIKELY...HEAVY DOWNPOURS WITH A LOW CHANCE OF FLASH FLOODING ARE POSSIBLE TONIGHT THROUGH MONDAY NIGHT. THE PRIMARY THREAT WILL BE ONCE AGAIN BE MINOR URBAN AND SMALL STREAM FLOODING...THUS NO FLASH FLOOD WATCH IS POSTED AT THIS TIME. && .LONG TERM /TUESDAY THROUGH SATURDAY/... THE COLD FRONT SLOWLY MOVES OFFSHORE LATE IN THE AFTERNOON OR EVENING HOURS OF TUESDAY. STILL A CHANCE OF SHOWERS AND TSTMS AS A RESULT...BUT BETTER CHANCES WILL REMAIN EAST OF THE CITY. MANY SPOTS SHOULD END UP DRY MOST...IF NOT ALL OF THE DAY. DRY CONDITIONS MOVE IN TUESDAY NIGHT AS HIGH PRESSURE BUILDS IN AT THE SURFACE. A FAIRLY DRY COLD FRONT MOVES THROUGH THE REGION THURSDAY...BUT WITH THE MAIN UPPER LEVEL FORCING MORE OVER NORTHERN NEW ENGLAND...WILL MAINTAIN ONLY SLIGHT CHANCE OF LIGHT RAIN SHOWERS FOR INTERIOR AREAS DURING THE DAY THURS WITH COOLER LOWER LEVEL TEMPS KEEPING MINIMAL INSTABILITY OVER THE AREA. DRYING CONDITIONS THEN TO END THE WEEK AS THE SURFACE HIGH TAKES HOLD OF THE REGION. ANOTHER FRONT APPROACHES FROM THE NORTHWEST NEXT WEEK...WHICH COULD BRING THE NEXT ROUND OF PRECIP. TEMPS SLIGHTLY ABOVE NORMAL ON TUESDAY...THEN NEAR NORMAL ON WEDNESDAY AND THURSDAY. A SHOT OF COOLER AIR BEHIND THE COLD FRONT FRONT THURSDAY INTO THURSDAY NIGHT WILL LEAD TO SLIGHTLY BELOW NORMAL TEMPERATURES FOR FRIDAY AND SATURDAY. && .AVIATION /12Z SUNDAY THROUGH THURSDAY/... A TROUGH OF LOW PRESSURE WILL LINGER OVER THE NORTHEASTERN STATES THROUGH TONIGHT. CONDITIONS WILL MAINLY VARY FROM VFR TO MVFR AT MOST TERMINALS THROUGH 12-16Z. SUB-VFR CONDITIONS WILL LINGER LONGEST AT KGON. LATEST RADAR TRENDS AND GUIDANCE SUPPORT IDEA OF HAVING A TEMPO GROUP FOR TSTMS FOR CITY TERMINALS 18-22Z. HAVE TEMPO FOR SHRA AT EASTERN TERMINALS A FEW HOURS LATER - CONFIDENCE IN THUNDER THERE IS NOT HIGH ENOUGH YET TO PLACE N TAFS. KEEP THINGS VFR FOR NOW - THOUGH BRIEF/LOCALIZED MVFR/IFR CONDITIONS IN STRONGER CONVECTION IS A POSSIBILITY. DO EXPECT MVFR OR LOWER CONDITIONS TO DEVELOP AGAIN LATE THIS EVENING/EARLY OVERNIGHT...SOONEST AT EASTERN TERMINALS AND LATER AT CITY TERMINALS. WINDS START OUT LIGHT AND VARIABLE AT ALL BUT KISP/KBDR WHERE OUT OF THE SSW AT UNDER 10 KT. WINDS BECOME S-SSE AT UNDER 10 KT AT ALL TERMINALS BY MID-LATE MORNING...THEN LIGHT AND VARIABLE AT ALL TERMINALS DURING THE EVENING. OUTLOOK FOR 12Z MONDAY THROUGH THURSDAY... .MONDAY-TUESDAY MORNING...SCT-NUMEROUS SHRA/TSTMS WITH MVFR OR LOWER POSSIBLE. MVFR/IFR STRATUS POSSIBLE EARLY MONDAY MORNING AND AGAIN LATE MONDAY NIGHT/EARLY TUESDAY MORNING. .TUESDAY AFTERNOON-WEDNESDAY NIGHT...VFR. .THURSDAY...MAINLY VFR WITH ISOLD SHRA/TSTM POSSIBLE. && .MARINE... A RELATIVELY RELAXED PRESSURE GRADIENT OVER THE WATERS SHOULD KEEP WINDS GENERALLY AT 10 KT OR LESS THROUGH TUESDAY...EXCEPT FOR 10-15 KT OVER THE COASTAL OCEAN WATERS INTO TONIGHT. WINDS INCREASE SLIGHTLY BEHIND A COLD FRONT TUESDAY NIGHT AND WEDNESDAY...BUT SHOULD REMAIN BELOW SCA LEVELS. TRANQUIL CONDITIONS SHOULD RETURN TO THE WATERS ON THURSDAY. WITH THE RELATIVELY LIGHT WINDS...EXPECT SEAS TO STAY BELOW SCA LEVELS. HOWEVER...WITH A 2 FT E-SE SWELL SHOULD END UP BEING CLOSE TO 5 FT THROUGH MONDAY AT AROUND 15-20 NM OFFSHORE IN THE COASTAL OCEAN WATER ZONES. FOR NOW DO NOT HAVE SUFFICIENT CONFIDENCE TO ISSUE AN SCA FOR HAZARDOUS SEAS FOR THE COASTAL OCEAN ZONES AT THIS TIME. && .HYDROLOGY... LOCALLY HEAVY RAINFALL IS POSSIBLE IN ANY THUNDERSTORM TODAY...WITH MINOR URBAN FLOODING BEING THE MAIN THREAT FROM ANY SUCH STORM. THERE IS STILL HOWEVER A CHANCE OF FLASH FLOODING. FROM TONIGHT THROUGH MONDAY NIGHT...WHEN COVERAGE OF RAINFALL SHOULD BE MORE WIDESPREAD...1 TO 2 INCHES OF RAIN WITH LOCALLY HIGHER AMOUNTS ARE POSSIBLE. THERE WILL BE AN INCREASING CHANCE OF WIDESPREAD MINOR URBAN/SMALL STREAM FLOODING. THERE ALSO REMAINS AT LEAST A LOW CHANCE OF FLASH FLOODING DURING THIS PERIOD...BUT AS OF NOW...CONFIDENCE IS NOT HIGH FOR WIDESPREAD FLASH FLOODING POTENTIAL...THUS NO WATCH AT THIS TIME. && .EQUIPMENT... DUE TO INTERFERENCE ISSUES WITH THE U.S. COAST GUARD...THE NEW YORK CITY NOAA ALL HAZARDS WEATHER RADIO STATION KWO35 HAS BEEN TEMPORARILY TAKEN OUT OF SERVICE WHILE A SOLUTION IS BEING FORMULATED. DURING THIS TIME...THE TRANSMITTER MAY BE RETURNED TO SERVICE INTERMITTENTLY FOR USE OF THE NOAA ALL HAZARDS RADIO PUBLIC WARNING SYSTEM DURING POTENTIALLY DANGEROUS WEATHER SITUATIONS...FOR ROUTINE WEEKLY TESTS OF THE WARNING SYSTEM...AND TO DETERMINE IF THE INTERFERENCE ISSUE HAS BEEN RESOLVED. && .OKX WATCHES/WARNINGS/ADVISORIES... CT...NONE. NY...NONE. NJ...NONE. MARINE...NONE. && SYNOPSIS...JC NEAR TERM...JC/PW SHORT TERM...JC LONG TERM...JC/SEARS AVIATION...MALOIT MARINE...MALOIT HYDROLOGY...JC EQUIPMENT...
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE NEW YORK NY 526 AM EDT SUN SEP 1 2013 NYZ074-075-080-081-178-179-021000- RICHMOND (STATEN ISLAND)-KINGS (BROOKLYN)-SOUTHWESTERN SUFFOLK- SOUTHEASTERN SUFFOLK-SOUTHERN QUEENS-SOUTHERN NASSAU- 526 AM EDT SUN SEP 1 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST NEW YORK. .DAY ONE...TODAY AND TONIGHT. THERE IS A CHANCE THAT SLOWLY MOVING SHOWERS AND THUNDERSTORMS PRODUCE FLASH FLOODING. FLASH FLOODING IS NOT HOWEVER EXPECTED TO BE WIDESPREAD. IN ADDITION...THERE IS A MODERATE RISK OF RIP CURRENT DEVELOPMENT AT THE ATLANTIC OCEAN BEACHES TODAY INTO THIS EVENING. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY. THE CHANCE OF FLASH FLOODING WITH SHOWERS AND THUNDERSTORMS CONTINUES THROUGH MONDAY AND MONDAY NIGHT. ONCE AGAIN...FLASH FLOODING IS NOT EXPECTED TO BE WIDESPREAD AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. && THIS HAZARDOUS WEATHER OUTLOOK PROVIDES A SUMMARY OF POTENTIAL WIDESPREAD HAZARDOUS WEATHER EVENTS THAT MAY REACH NWS WARNING CRITERIA. MOST LONG FUSED NWS WATCHES...WARNINGS AND ADVISORIES IN EFFECT ARE HIGHLIGHTED. PLEASE REFER TO THE LATEST NWS FORECASTS FOR WEATHER NOT MEETING NWS WARNING CRITERIA. CTZ005>012-NJZ002-004-006-103>108-NYZ067>073-078-079-176-177-021000- NORTHERN FAIRFIELD-NORTHERN NEW HAVEN-NORTHERN MIDDLESEX- NORTHERN NEW LONDON-SOUTHERN FAIRFIELD-SOUTHERN NEW HAVEN- SOUTHERN MIDDLESEX-SOUTHERN NEW LONDON-WESTERN PASSAIC- EASTERN PASSAIC-HUDSON-WESTERN BERGEN-EASTERN BERGEN-WESTERN ESSEX- EASTERN ESSEX-WESTERN UNION-EASTERN UNION-ORANGE-PUTNAM-ROCKLAND- NORTHERN WESTCHESTER-SOUTHERN WESTCHESTER-NEW YORK (MANHATTAN)-BRONX- NORTHWESTERN SUFFOLK-NORTHEASTERN SUFFOLK-NORTHERN QUEENS- NORTHERN NASSAU- 526 AM EDT SUN SEP 1 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHERN CONNECTICUT...NORTHEAST NEW JERSEY AND SOUTHEAST NEW YORK. .DAY ONE...TODAY AND TONIGHT. THERE IS A CHANCE THAT SLOWLY MOVING SHOWERS AND THUNDERSTORMS PRODUCE FLASH FLOODING. FLASH FLOODING IS NOT HOWEVER EXPECTED TO BE WIDESPREAD. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY. THE CHANCE OF FLASH FLOODING WITH SHOWERS AND THUNDERSTORMS CONTINUES THROUGH MONDAY AND MONDAY NIGHT. ONCE AGAIN...FLASH FLOODING IS NOT EXPECTED TO BE WIDESPREAD AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. && THIS HAZARDOUS WEATHER OUTLOOK PROVIDES A SUMMARY OF POTENTIAL WIDESPREAD HAZARDOUS WEATHER EVENTS THAT MAY REACH NWS WARNING CRITERIA. MOST LONG FUSED NWS WATCHES...WARNINGS AND ADVISORIES IN EFFECT ARE HIGHLIGHTED. PLEASE REFER TO THE LATEST NWS FORECASTS FOR WEATHER NOT MEETING NWS WARNING CRITERIA. ANZ330-335-338-340-345-350-353-355-370-021000- LONG ISLAND SOUND EAST OF NEW HAVEN CT/PORT JEFFERSON NY- LONG ISLAND SOUND WEST OF NEW HAVEN CT/PORT JEFFERSON NY- NEW YORK HARBOR-PECONIC AND GARDINERS BAYS- SOUTH SHORE BAYS FROM JONES INLET THROUGH SHINNECOCK BAY- MORICHES INLET NY TO MONTAUK POINT NY OUT 20 NM- FIRE ISLAND INLET NY TO MORICHES INLET NY OUT 20 NM- SANDY HOOK NJ TO FIRE ISLAND INLET NY OUT 20 NM- WATERS FROM MONTAUK POINT NY TO SANDY HOOK NJ FROM 20 TO 40 NM- 526 AM EDT SUN SEP 1 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR ATLANTIC COASTAL WATERS. .DAY ONE...TODAY AND TONIGHT. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME THAT WOULD MEET NATIONAL WEATHER SERVICE WARNING CRITERIA. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. && THIS HAZARDOUS WEATHER OUTLOOK PROVIDES A SUMMARY OF POTENTIAL WIDESPREAD HAZARDOUS WEATHER EVENTS THAT MAY REACH NWS WARNING CRITERIA. MOST LONG FUSED NWS WATCHES...WARNINGS AND ADVISORIES IN EFFECT ARE HIGHLIGHTED. PLEASE REFER TO THE LATEST NWS FORECASTS FOR WEATHER NOT MEETING NWS WARNING CRITERIA.
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
631 AM EDT SUN SEP 1 2013
CTZ006-007-011130-
NORTHERN MIDDLESEX-NORTHERN NEW HAVEN-
631 AM EDT SUN SEP 1 2013
...STRONG THUNDERSTORM WILL IMPACT CENTRAL NEW HAVEN AND MIDDLESEX
COUNTIES...
AT 628 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR CHESHIRE...OR NEAR WALLINGFORD...AND MOVING
NORTHEAST AT 15 MPH.
FREQUENT CLOUD TO GROUND LIGHTNING...SMALL HAIL...AND WINDS UP TO 40
MPH ARE EXPECTED WITH THIS STORM. IN ADDITION...HEAVY RAIN...WITH
RAINFALL RATES OF UP TO AN INCH TO AN INCH AND A HALF PER HOUR IS
OCCURRING WITH THIS STORM. THIS COULD CAUSE PONDING OF WATER ON
ROADWAYS...AND MINOR FLOODING OF POOR DRAINAGE AREAS.
LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS. REMEMBER...IF YOU CAN
HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. MOVE
TO SAFE SHELTER IMMEDIATELY.
LAT...LON 4164 7249 4151 7243 4137 7293 4153 7303
4157 7289 4155 7286 4157 7285 4158 7283
4156 7282 4158 7280 4158 7276 4161 7272
4164 7258 4165 7251
JCSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
732 AM EDT SUN SEP 1 2013
CTZ007-008-011230-
NORTHERN MIDDLESEX-NORTHERN NEW LONDON-
732 AM EDT SUN SEP 1 2013
...THUNDERSTORMS PRODUCING LOCALLY HEAVY RAINFALL WILL IMPACT
MIDDLESEX AND NORTHERN NEW LONDON COUNTIES...
AT 728 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
THUNDERSTORMS PRODUCING LOCALLY HEAVY RAINFALL ALONG A LINE
EXTENDING FROM CROMWELL TO EAST HADDAM...OR ALONG A LINE EXTENDING
FROM MIDDLETOWN TO 6 MILES NORTHWEST OF CHESTER...AND MOVING EAST AT
20 MPH.
PEOPLE IN MIDDLESEX AND NORTHERN NEW LONDON COUNTIES...INCLUDING
CROMWELL...PORTLAND...EAST HADDAM...EAST HAMPTON...COLCHESTER...
SALEM...LEBANON AND NORWICH...SHOULD MONITOR THE WEATHER SITUATION
CLOSELY. LISTEN FOR POSSIBLE WARNINGS AND BE PREPARED TO TAKE
APPROPRIATE ACTION SHOULD SEVERE WEATHER THREATEN.
VERY HEAVY RAIN...WITH RAINFALL RATES OF UP TO ONE AND ONE HALF
INCHES AN HOUR...IS OCCURRING WITH THESE STORMS. THIS COULD CAUSE
PONDING OF WATER ON ROADWAYS...AND MINOR FLOODING OF POOR DRAINAGE
AREAS.
LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS. REMEMBER...IF YOU CAN
HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. MOVE
TO SAFE SHELTER IMMEDIATELY.
LAT...LON 4155 7191 4137 7253 4161 7272 4163 7271
4165 7251 4159 7246 4160 7234 4164 7234
4168 7227 4169 7227 4172 7224 4167 7217
4165 7198
MALOITThe Brookhaven radar (KOKX), 105 km away, was scanning. The volume nearest the first event began at 13:53 UTC.
1 flash flood. Local standard time, as filed.
Franklin Ave. at S. Broad St. in Ridgewood and the intersection of Cornwall Rd. and Prospect St. were closed due to flooding.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in New Jersey in 2013Every state in 2013This day in weather historyWarnings in New Jersey, September 2013
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: 477759.