Thunderstorms developed along a stationary front over the area on August 23rd. These thunderstorms were slow moving and produced heavy rainfall over Long Island.
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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.
Thunderstorms developed along a stationary front over the area on August 23rd. These thunderstorms were slow moving and produced heavy rainfall over Long Island. The thunderstorms developed in an environment with 1.5 to 1.7 precipitable water and CAPE values of 1500 - 2000 J/kg. The thunderstorms produced locally up to 2 to 3 inches of rain in a 2 hour period.
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 23, 10:10 AM EST, 1 hour 20 minutes earlier.
Area Forecast Discussion National Weather Service New York NY 1110 AM EDT Tue Aug 23 2022 .SYNOPSIS... A stationary front and frontal wave across the area will get kicked eastward late this afternoon into this evening as an upper trough moves across the area. High pressure will then build in on Wednesday and remain through Thursday. A weak cold front moves through the area Friday into Saturday with high pressure building in for the rest of the weekend. Another frontal system may approach the area by early next week. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... A stationary front will serve as a trigger for scattered showers and/or thunderstorms mainly late this morning/early this afternoon across eastern CT and LI as part of the front lifts north as a warm front. The remainder of the boundary will extend southward along the Mid Atlantic coast as a frontal wave lifts north with the warm front. This will serve as the focus for late afternoon/early evening convection as the front gets kicked eastward by an upper trough. A few strong storms will be possible with a moderate to high CAPE environment, but weakly sheared. In addition, moisture profiles gradually dry out through the day with a deepening W/SW flow. Mid-level lapse rates also right around 6C with a mid-level warm nose around 600 mb. This will limit the magnitude of updrafts. Thus, mainly expecting a sub-severe event. Flash flooding also not expected with the progressive nature of these storms and PW values dropping below and 1.50 inches. Highs today will top out in the lower to mid 80s, a few degrees above normal. The upper trough axis and cold front move to the east by late this evening. && .SHORT TERM /6 PM THIS EVENING THROUGH THURSDAY NIGHT/... As the trough moves east and weakens the upper flow becomes zonal. Clearing will be slow as high pressure and drying will be slow to move into the region. Weak high pressure builds over the region Wednesday and remains into Thursday. The upper flow remains nearly zonal into Thursday, then an impulse rotates into the upper trough to the north with a weak shortwave amplifying to the northwest toward Friday morning. Seasonal temperatures are expected Wednesday into Thursday night. && .LONG TERM /FRIDAY THROUGH MONDAY/... No significant changes were made to the long term and followed the NBM closely. The area remains ahead of an approaching weak frontal system on Friday with generally SW flow. This will allow temperatures to rise into the upper 80s and low 90s for much of the area. The weak cold front approaches the area by the afternoon on Friday which may result in some showers and thunderstorms, especially for area north and west of NYC. The chance of precipitation dissipates overnight as the front slowly moves through the area overnight into Saturday. High pressure moves back into the area through the remainder of the weekend and into the beginning of next week with generally sunny skies and seasonable conditions. High temperatures will be in the 80s through Monday. W flow increases ahead of an approaching frontal system by Tuesday with highs increasing slightly to the upper 80s and low 90s. Though the timing of the frontal system is uncertain at this time, showers and thunderstorms will be possible whenever it makes its way through. && .AVIATION /15Z TUESDAY THROUGH SATURDAY/... A stationary front remains draped over the area, though conditions are generally improving at terminals with daytime heating helping to mix out lower ceilings. Improving to VFR everywhere by 16z or so. Cannot rule out an isolated shower for the remainder of the morning. Scattered showers/tstms are possible this afternoon after 18z. Some showers or storms may form along seabreezes making coverage, timing, and placement challenging. S to SW winds generally 5-10 kt today. Winds shift to the W tonight less than 10 kt. ...NY Metro (KEWR/KLGA/KJFK/KTEB) TAF Uncertainty... Amendments possible for changing flight categories this afternoon for the timing and coverage of showers and thunderstorms. .OUTLOOK FOR 12Z WEDNESDAY THROUGH SATURDAY... .Wednesday through Thursday...VFR. .Friday...Chance of MVFR or lower flight cat in any showers/tstms. .Saturday...VFR. Detailed information, including hourly TAF wind component forecasts, can be found at: https:/www.weather.gov/zny/ && .MARINE... With a weak pressure gradient force expected into Thursday winds and seas will remain below SCA levels across the forecast waters. A weak pressure gradient over the area late this week and through early next week will result in sub-SCA conditions for all waters. && .FIRE WEATHER... Areas of severe drought dot the local area, while most locations are designated as abnormally dry conditions or moderate drought. Most climate locations have not received an inch of rainfall this month. KBDI levels, which are indicative of subterranean depth of dryness, have been worsening with time. At present KBDI levels, fire spread is enhanced, even without much wind. Some relief has come with rainfall Monday, with additional rainfall possible today with scattered showers and thunderstorms. && .HYDROLOGY... No hydrologic impacts expected today through early next week. && .TIDES/COASTAL FLOODING... There is a moderate risk of rip current development at the ocean beaches for today and Wednesday as seas build under southerly flow, and with a southerly swell. && .OKX WATCHES/WARNINGS/ADVISORIES... CT...None. NY...None. NJ...None. MARINE...None. && SYNOPSIS...MET/DW/MW NEAR TERM...MET/DW SHORT TERM...MET LONG TERM...MW AVIATION...MW MARINE...DR/MET/MW FIRE WEATHER... HYDROLOGY...MET/MW TIDES/COASTAL FLOODING...
Hazardous Weather Outlook National Weather Service New York NY 324 AM EDT Tue Aug 23 2022 CTZ005>012-NJZ002-004-006-103>108-NYZ067>075-078>081-176>179-241000- 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- Richmond (Staten Island)-Kings (Brooklyn)-Northwest Suffolk- Northeast Suffolk-Southwest Suffolk-Southeast Suffolk- Northern Queens-Northern Nassau-Southern Queens-Southern Nassau- 324 AM EDT Tue Aug 23 2022 This Hazardous Weather Outlook is for southern Connecticut, northeastern New Jersey and southeastern New York. .DAY ONE...Today and tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. No hazardous weather is expected at this time that would meet NWS 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. ANZ331-332-335-338-340-345-350-353-355-241000- Long Island Sound East of New Haven CT/Port Jefferson NY to the Mouth of the Connecticut River- Long Island Sound East of the Mouth of the Connecticut River- 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- 324 AM EDT Tue Aug 23 2022 This Hazardous Weather Outlook is for the Atlantic coastal waters, New York Harbor, Long Island Sound, and the Long Island bays. .DAY ONE...Today and tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. No hazardous weather is expected at this time that would meet NWS 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
718 AM EDT Tue Aug 23 2022
NYZ079-081-231215-
Southeast Suffolk NY-Northeast Suffolk NY-
718 AM EDT Tue Aug 23 2022
...A strong thunderstorm will impact portions of central Suffolk
County through 815 AM EDT...
At 717 AM EDT, Doppler radar was tracking a strong thunderstorm over
Calverton, or over Wading River, moving east at 15 mph.
HAZARD...Winds in excess of 40 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Riverhead, Manorville, Wading River, Mattituck, Southampton,
Calverton, Shinnecock Hills, Peconic, Hampton Bays, Flanders, North
Sea, Cutchogue, Aquebogue, Jamesport and Laurel.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4098 7289 4100 7264 4110 7245 4102 7241
4102 7242 4098 7242 4098 7241 4100 7240
4088 7235 4084 7283
TIME...MOT...LOC 1117Z 251DEG 15KT 4095 7278
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
JPSpecial Weather Statement
National Weather Service New York NY
1213 PM EDT Tue Aug 23 2022
NYZ078-080-177-179-231700-
Southwest Suffolk NY-Northwest Suffolk NY-Northern Nassau NY-
Southern Nassau NY-
1213 PM EDT Tue Aug 23 2022
...A strong thunderstorm will impact portions of west central Suffolk
and east central Nassau Counties through 100 PM EDT...
At 1212 PM EDT, Doppler radar was tracking a strong thunderstorm over
Dix Hills, or over Huntington Station, moving northeast at 10 mph.
HAZARD...Winds in excess of 40 mph and half inch hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Commack, Huntington Station, Plainview, Hauppauge, Syosset,
Huntington, Stony Brook, Farmingdale, Northport, Hicksville, Dix
Hills, Smithtown, Melville, Woodbury and Centerport.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4083 7352 4086 7345 4095 7329 4092 7322
4093 7317 4098 7316 4098 7311 4091 7302
4076 7334 4073 7345 4073 7353
TIME...MOT...LOC 1612Z 239DEG 8KT 4083 7336
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH
DSThe Brookhaven radar (KOKX), 42 km away, was scanning. The volume nearest the first event began at 16:28 UTC.
3 flash flood. Local standard time, as filed.
Road closure near Deer Park Ave and Jericho Turnpike in Elwood due to flooding.
Video shows road flooding with stranded vehicle on Main Street in Northport NY.
Greenlawn Fire Department reports flooding around town. Little Plains Road closed with several vehicles stranded.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in New York in 2022Every state in 2022This day in weather historyWarnings in New York, August 2022
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: 1052849, 1052850, 1052851.