A passing mid level disturbance triggered a thunderstorm, whose lightning struck a person in West Nyack.
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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.
A passing mid level disturbance triggered a thunderstorm, whose lightning struck a person in West Nyack.
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 Aug 9, 2:06 PM EST, 1 hour 24 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NEW YORK NY 306 PM EDT TUE AUG 9 2011 .SYNOPSIS... LOW PRESSURE MOVES THROUGH THE REGION TONIGHT...FOLLOWED BY A COLD FRONT WEDNESDAY NIGHT. HIGH PRESSURE RETURNS FOR THE END OF THE WORK WEEK...THEN ANOTHER STORM SYSTEM IMPACTS THE REGION FOR THE SECOND HALF OF THE WEEKEND. && .NEAR TERM /UNTIL 6 AM WEDNESDAY MORNING/... WAVE OF SHOWERS AND TSTMS MOVING THROUGH NE NJ AND INTO NYC. HEAVY RAIN AND LIGHTNING STRIKES CAN BE EXPECTED WITH IT AS IT TRACKS EAST. LATEST LAPS GUIDANCE INDICATES 50-60 KT OF 0-3 KM BULK SHEAR WITH THAT AREA...AND WITH SPC PLACING THE AREA UNDER A SLIGHT RISK FOR SEVERE TSTMS...THERE COULD BE A FEW DAMAGING WIND GUSTS. PWATS CLOSE TO 2"...SO MAIN THREAT CONTINUES TO BE HEAVY RAIN. URBAN FLOODING OF LOW-LYING AND POOR DRAINAGE AREAS...AS WELL AS FLOODING OF SMALL STREAMS CAN BE EXPECTED...AND CAN ALSO EXPECT LOCALIZED FLASH FLOODING. FIRST WAVE DEPARTS LATE THIS AFTERNOON...AND THERE IS AN AREA OF CLEARING AS INDICATED BY LATEST VIS SAT IMG. NOT SURE IF THAT WILL HOLD TOGETHER AND MAKE IT TO THE LOCAL AREA...BUT IF IT DOES...THERE COULD BE A BRIEF PERIOD OF HEATING LATE THIS AFTERNOON THAT WOULD RESULT IN FURTHER DESTABILIZATION OF THE ATMOSPHERE...WHICH COULD RESULT IN ANOTHER ROUND OF POTENTIALLY SEVERE WEATHER. THIS FIRST WAVE SHOULD SOMEWHAT STABILIZE THE ATMOSPHERE WITH COOLER SFC TEMPS...BUT WITH ONE AREA OF LOW PRES PASSING ACROSS NORTHERN NY STATE AND A SECONDARY LOW DEVELOPING OVER THE DELMARVA AND PASSING SOUTH OF LONG ISLAND TONIGHT...WILL EXPECT AT LEAST ANOTHER ROUND OF SHOWERS AND TSTMS THIS EVENING. THIS WOULD HAVE UPPER SUPPORT FROM AN H5 TROUGH AND MID-LEVEL SHORTWAVE...SO ANOTHER ROUND OF MODERATE TO LOCALLY HEAVY SHOWERS AND TSTMS WITH GUSTY WINDS CAN BE EXPECTED. CAPE VALUES WILL REMAIN AROUND 1500 J/KG...ALONG WITH A LIFTED INDEX AROUND -3 C. SYSTEM MOVES EAST OF THE AREA THIS EVENING...AND WITH LOSS OF DIURNAL HEATING...THE THREAT FOR TSTMS WILL WIND DOWN...BUT WILL CONTINUE TO HAVE SHOWERS THROUGH JUST AFTER MIDNIGHT AS THE SYSTEM DEPARTS. WINDS SHIFT TO MORE OF A WESTERLY FLOW...BUT WITH WINDS DIMINISHING...WILL BE SLOW FOR LOW LEVEL MOISTURE TO SCOUR OUT. WITH ALL THIS ABUNDANT LOW-LEVEL MOISTURE AND TEMPS FALLING CLOSE TO THE SFC DEW POINT...WILL EXPECT PATCHY FOG TO DEVELOP...MAINLY AWAY FROM THE CITY. STORM TOTAL QPF VALUES FALL BELOW 3HR AND 6 HR FFG VALUES...SO WILL NOT ISSUE A FLASH FLOOD WATCH AT THIS TIME...BUT WILL HAVE TO WATCH AS URBAN AND SMALL STREAM FLOODING WILL BE LIKELY...AND IF TSTMS TRAIN OVER EACH OTHER...LOCAL FLASH FLOOD WARNINGS WILL BE POSSIBLE. SPC HAS THE AREA UNDER A GENERAL OUTLOOK. GUSTY WINDS ARE POSSIBLE...BUT THE MAIN THREAT GOING INTO THE LATE AFTERNOON/EARLY EVENING HOURS IS FOR HEAVY RAIN. && .SHORT TERM /6 AM WEDNESDAY MORNING THROUGH WEDNESDAY NIGHT/... ZONAL FLOW SETS UP WED MORNING...ALLOWING DEW POINTS TO DROP FROM THE UPPER 60S/LOWER 70S TO THE MID 60S. COLD FRONT PASSES THROUGH THE REGION LATE IN THE DAY...AND HAS SOME SUPPORT WITH H5 TROUGH/SHORTWAVE. WITH A DRIER ATMOSPHERE...CHANCES FOR CONVECTION WILL BE LOW...AND MAINLY CONFINED TO THE LOWER HUDSON VALLEY AND SOUTHERN CT. WILL CARRY SLIGHT CHANCE POPS FOR THOSE AREAS...AS BEST INSTABILITY LIES THERE. COLD FRONT MOVES THROUGH THE REGION IN THE EVENING. WINDS SHIFT NORTH AND A MUCH DRIER ATMOSPHERE BUILDS INTO THE REGION WITH SFC DEWPOINTS DROPPING INTO THE 50S. MAX TEMPS ON WED TOP OFF IN THE UPPER 80S TO AROUND 90 ACROSS NYC/NE NJ...AND IN THE MID 80S ELSEWHERE. LOWS WED NIGHT DROP INTO THE 60S...WITH LOWS IN THE 50S POSSIBLE ACROSS PARTS OF THE LOWER HUDSON VALLEY. && .LONG TERM /THURSDAY THROUGH TUESDAY/... HIGH PRESSURE BUILDS FROM THE WEST THURSDAY THROUGH END OF THE WEEK...USHERING DRIER AND MORE COMFORTABLE HUMIDITY LEVELS. ON SATURDAY...THE DEVELOPMENT OF A SOUTHERLY FLOW WILL ALLOW HUMIDITY LEVELS TO INCREASE. THE NEXT TROUGH/COLD FRONT IS EXPECTED TO MOVE ACROSS THE AREA SATURDAY NIGHT INTO SUNDAY. LATEST MODEL RUNS CONTINUE TO SHOW BEST CHANCE FOR PRECIPITATION TO BE SATURDAY EVENING INTO SATURDAY NIGHT AND CONTINUING INTO SUNDAY. HIGH PRESSURE BUILDS ACROSS THE AREA THE START OF THE WORKWEEK AND REMAINS THROUGH THE MIDDLE OF THE WEEK. TEMPERATURES ARE EXPECTED TO BE NEAR NORMAL LEVELS THROUGH THE END OF THE WEEK...THEN ABOUT 5 DEGREES BELOW NORMAL FOR THE REMAINDER OF THE EXTENDED PERIOD. && .AVIATION /19Z TUESDAY THROUGH SUNDAY/... A WARM FRONT OVER CNTRL NJ WILL LIFT N THRU THE REGION THIS AFTN. LOW PRES WILL DRAW A COOL FRONT THRU TONIGHT. POCKETS OF MARINE STRATUS STREAMING IN ON SE LLVL FLOW. COVERAGE WAS LIMITED...BUT MID CLOUDS ARE BLOCKING SATELLITE VISIBILITY. TAFS INDICATE SCT015 OR LOWER...BUT PERIODS OF MVFR OR LOWER CAN BE EXPECTED THRU 00Z. -RA APPROACHING FROM THE W. ATTM THE ACTIVITY APPEARS ELEVATED SO ONLY CB/S INCLUDED IN THE TAFS WITH -SHRA. AS THE LOW GETS CLOSER LATE THIS AFTN AND EVE...BETTER CHANCE FOR TSTMS AND TSRA TEMPO WILL BE RETAINED. AFT TSTMS...A PERIOD OF MVFR OR EVEN LOWER POSSIBLE IF STORMS WEAKEN OVER THE AREA. IF TSTMS DO NOT DEVELOP...BETTER CHANCE AT VFR AFT 00Z. IMPROVEMENT BEHIND THE FRONT OVERNIGHT. KGON MAY FOG IN MORE THAN THE TAF INDICATES BEFORE THE FRONTAL PASSAGE. SE FLOW JUST N OF THE WARM FRONT THIS AFTN. THE FRONT IS EXPECTED TO POKE THRU THE METRO...BRINGING WINDS CLOSER TO 170. IF THE FRONT STAYS S OF THE REGION WINDS CLOSER TO 120-140 WILL OCCUR. A PERIOD OF UNCERTAINTY AFT 00Z IN WIND DIRECTION. THIS WILL ALL BE DEPENDENT ON THE AMOUNT OF CONVECTION THAT DEVELOPS AND THE LOCAL IMPACTS. WINDS SHIFT TO THE WNW OVERNIGHT...WITH BRISK W FLOW ON WED. ...NY METRO ENHANCED AVIATION WEATHER SUPPORT... DETAILED INFORMATION...INCLUDING HOURLY TAF WIND COMPONENT FCSTS CAN BE FOUND AT: HTTP://WWW.ERH.NOAA.GOV/ZNY/N90 (LOWER CASE) KJFK FCSTER COMMENTS: AMENDMENTS POSSIBLE FOR TIMING OF CONVECTION AND WINDS NEAR THE WARM FRONT. KLGA FCSTER COMMENTS: AMENDMENTS POSSIBLE FOR TIMING OF CONVECTION AND WINDS NEAR THE WARM FRONT. KEWR FCSTER COMMENTS: AMENDMENTS POSSIBLE FOR TIMING OF CONVECTION AND WINDS NEAR THE WARM FRONT. KTEB FCSTER COMMENTS: AMENDMENTS POSSIBLE FOR TIMING OF CONVECTION AND WINDS NEAR THE WARM FRONT. KHPN FCSTER COMMENTS: AMENDMENTS POSSIBLE FOR TIMING OF CONVECTION AND WINDS NEAR THE WARM FRONT. KISP FCSTER COMMENTS: SHRA WITH CB/S INCLUDED IN THE TAF FOR THIS AFTN/EVE. SHRA COULD BE UPGRADED TO TSRA IF TSTMS APPEAR THEY WILL HOLD TOGETHER. AMENDMENTS POSSIBLE FOR WINDS NEAR THE WARM FRONT. OUTLOOK FOR 18Z WEDNESDAY THROUGH SUNDAY... WED...GENERALLY VFR...HOWEVER ISOLD-SCT TSTMS LIKELY. THU-SAT...VFR. SUN...MORNING MVFR OR LOWER POSSIBLE WITH ONSHORE FLOW. SUB-VFR POSSIBLE IN -SHRA/TSRA. && .MARINE... SUB SCA CONDITIONS ARE EXPECTED THROUGH WEDNESDAY NIGHT AS SEAS STAY BELOW 5 FT AND OVERALL WIND GUSTS ARE EXPECTED TO REMAIN BELOW 25 KT. LOW PRES MOVES THROUGH THE WATERS TONIGHT...AND THERE MAY BE SOME TSTMS THROUGH THIS EVENING THAT PRODUCE WIND GUSTS OVER 30 KT...BUT THAT WOULD BE LOCALIZED AND COVERED BY ANY MARINE WEATHER STATEMENTS OR SPECIAL MARINE WARNINGS. SEAS ON THE OCEAN BUILD TO 4 FT ON WED...AND BEHIND THE LOW...GUSTY W-NW WINDS DEVELOP...BUT GUSTS SHOULD MAX OUT AT AROUND 20 KT. A COLD FRONT PASSES THROUGH THE REGION WED NIGHT...BUT THE GRADIENT REMAINS WEAK...AND ANY GUSTS DIMINISH WED NIGHT. SUB SCA CONDITIONS ARE EXPECTED THROUGH THE EXTENDED PERIOD. && .HYDROLOGY... MODERATE TO LOCALLY HEAVY RAIN EXPECTED FOR TONIGHT AS LOW PRES PASSES THROUGH THE REGION. MINOR FLOODING IS POSSIBLE. TOTAL RAINFALL AMOUNTS WILL BE UP TO AROUND 1 INCH WITH LOCALLY HIGHER AMOUNTS OF 1-2 INCHES POSSIBLE. LOCALIZED FLASH FLOODING MAY ALSO OCCUR. ONLY ISOLATED SHOWERS OR THUNDERSTORMS ARE EXPECTED WEDNESDAY AFTERNOON. && .OKX WATCHES/WARNINGS/ADVISORIES... CT...NONE. NY...NONE. NJ...NONE. MARINE...NONE. && SYNOPSIS...MPS NEAR TERM...MPS SHORT TERM...MPS LONG TERM...FIG AVIATION...JMC MARINE...FIG/MPS HYDROLOGY...MPS
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE NEW YORK NY 427 PM EDT TUE AUG 9 2011 NJZ002-004-006-103>108-NYZ067-069-101000- WESTERN PASSAIC-EASTERN PASSAIC-HUDSON-WESTERN BERGEN-EASTERN BERGEN- WESTERN ESSEX-EASTERN ESSEX-WESTERN UNION-EASTERN UNION-ORANGE- ROCKLAND- 427 PM EDT TUE AUG 9 2011 ...SEVERE THUNDERSTORM WATCH 755 IN EFFECT UNTIL 9 PM EDT THIS EVENING... THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST NEW JERSEY AND SOUTHEAST NEW YORK. .DAY ONE...TONIGHT. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. SEVERE THUNDERSTORM WATCH. SHOWERS AND THUNDERSTORMS THIS EVENING WILL RESULT IN HEAVY RAIN AND MINOR FLOODING. LOCALIZED FLASH FLOODING MAY OCCUR AS WELL. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME THAT WOULD MEET NATIONAL WEATHER SERVICE WARNING CRITERIA. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. && 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-NYZ068-070>075-078>081-176>179-101000- NORTHERN FAIRFIELD-NORTHERN NEW HAVEN-NORTHERN MIDDLESEX- NORTHERN NEW LONDON-SOUTHERN FAIRFIELD-SOUTHERN NEW HAVEN- SOUTHERN MIDDLESEX-SOUTHERN NEW LONDON-PUTNAM-NORTHERN WESTCHESTER- SOUTHERN WESTCHESTER-NEW YORK (MANHATTAN)-BRONX- RICHMOND (STATEN ISLAND)-KINGS (BROOKLYN)-NORTHWESTERN SUFFOLK- NORTHEASTERN SUFFOLK-SOUTHWESTERN SUFFOLK-SOUTHEASTERN SUFFOLK- NORTHERN QUEENS-NORTHERN NASSAU-SOUTHERN QUEENS-SOUTHERN NASSAU- 427 PM EDT TUE AUG 9 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHERN CONNECTICUT AND SOUTHEAST NEW YORK. .DAY ONE...TONIGHT. SHOWERS AND THUNDERSTORMS THIS EVENING WILL RESULT IN HEAVY RAIN AND MINOR FLOODING. LOCALIZED FLASH FLOODING MAY OCCUR AS WELL. THUNDERSTORMS MAY ALSO RESULT IN GUSTY WINDS. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME THAT WOULD MEET NATIONAL WEATHER SERVICE WARNING CRITERIA. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. && 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. ANZ330-335-338-340-345-350-353-355-101000- 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- 427 PM EDT TUE AUG 9 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR ATLANTIC COASTAL WATERS. .DAY ONE...TONIGHT. SHOWERS AND THUNDERSTORMS THIS EVENING WILL RESULT IN HEAVY RAIN WITH VSBY LOCALLY LESS THAN 1 NM. THUNDERSTORMS MAY ALSO RESULT IN GUSTY WINDS AROUND 30 KT. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME THAT WOULD MEET NATIONAL WEATHER SERVICE WARNING CRITERIA. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. && 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.
The Brookhaven radar (KOKX), 96 km away, was scanning. The volume nearest the first event began at 20:29 UTC.
1 lightning. Local standard time, as filed.
A 45 year old man was struck by lightning at the Tilcon Rock Quarry in West Nyack.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in New York in 2011Every state in 2011This day in weather historyWarnings in New York, 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: 345775.