A mid level disturbance along with a frontal boundary to the north triggered strong to severe thunderstorms across Southeastern New York.
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.
A mid level disturbance along with a frontal boundary to the north triggered strong to severe thunderstorms across Southeastern New York.
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 Jun 3, 3:22 PM EST, 3 hours 34 minutes earlier.
Area Forecast Discussion
National Weather Service New York NY
422 PM EDT Wed Jun 3 2020
.SYNOPSIS...
A weak cold front passes through overnight and stalls just to the
south on Thursday before returning north as a warm front
Thursday night. This warm front lifts north of the region
Friday. A cold front then approaches, moving in late Friday
night into Saturday. The front moves southeast of Long Island
Saturday night. High pressure will then build in for the
remainder of the weekend and into early next week.
&&
.NEAR TERM /UNTIL 6 AM THURSDAY MORNING/...
An MCS that produced severe weather to the south of the region
and only showers across the area is now well offshore. Uncertainty
remains in whether or not over the next few hours the airmass
can destabilize enough for convection to fire up along a pref-
frontal trough early this evening. The HRRR continues to develop
convection NW of the Lower Hudson Valley toward 6 pm, which
then drops south and east across the area through early this
evening. So will maintain a scattered threat with any strong or
severe being isolated.
A weak cold front then settles south overnight and become nearly
stationary just to the south by morning with a nearly zonal
flow aloft.
Overnight lows will be in the lower 60s, which is a few degrees
above normal. It will also remain humid with dew points of
similar values.
There remains a high rip current risk at the ocean beaches
through this evening due to 4-5 ft south to southeast long
period swells.
&&
.SHORT TERM /6 AM THURSDAY MORNING THROUGH 6 PM THURSDAY/...
A diffuse front to the south of the region will see SW-S winds
bridge across it with a warm day and plenty of sun. High will
get into the lower to mid 80s away from the immediate coast.
The boundary returns north as a warm front Thursday night as
weak thermal forcing combines with a potential convective
perturbation moving in from the Ohio Valley. For the time, have
kept this as a chance of showers as instability is minimal as
is the forcing.
Lows Thursday night will remain above normal with readings in
the 60s.
The high risk for the development of rip currents at the ocean
beaches continues Thursday due to 5 ft south to southeast long
period swells.
&&
.LONG TERM /THURSDAY NIGHT THROUGH WEDNESDAY/...
Mid level zonal flow becomes more SW Saturday night with the passage
of a shortwave. Then the mid level flow becomes NW Sunday into early
next week with ridging. Ridge axis moves across midweek with another
shortwave approaching next Wednesday night.
At the surface, a warm front lifts north of the region Friday which
will be part of a developing low pressure system with its parent low
in Southeast Canada. A warm and moist airmass will be in place.
Highs forecast Friday and Saturday are mostly in the upper 70s to
mid 80s along with forecast dewpoints in the mid to upper 60s for
most locations. The associated cold front will approach Friday into
Friday night and move across on Saturday. The cold front will exit
southeast of Long Island Saturday into Saturday night, ushering in a
cooler and drier airmass. There will be chances for showers and
thunderstorms. The thunder chances are greater during the day with
more forecast instability Friday and Saturday during the daytime.
Showers taper off behind the cold front Saturday night.
High pressure from Central Canada will then build into the region
for the remainder of the weekend and into early next week. Dry
weather will remain across the region Sunday through Monday night.
Temperatures are forecast to be near normal.
The high pressure area will settle offshore into the Atlantic
Tuesday into Tuesday night. Another low pressure system approaches
just after midweek with its associated cold front. Temperatures will
gradually trend upward. Dry conditions forecast Tuesday and Tuesday
night. Chances of showers return Wednesday into Wednesday night next
week.
&&
.AVIATION /20Z WEDNESDAY THROUGH MONDAY/...
Low pres passes n of the area this eve, and weak high pres sets up s
of the area on Thu.
There is a low potential for additional tstms to develop this aftn
and eve. The prob was too low to include in the TAFs, but vcsh has
been maintained.
VFR is expected outside of any tstms or stronger shwrs should they
develop.
W flow veers a bit to the nw this eve, then backs to the sw on Thu.
Winds are generally expected to be in the 10-15 kt range thru the
eve push, although ocnl gusts to around 20 kt possible at the NYC
terminals.
There is a chance for tstm development Thu aftn and eve, but right
now chances are too low to include in the TAFs.
.OUTLOOK FOR 18Z THURSDAY THROUGH MONDAY...
.Rest of Thu...Aftn and eve tstms possible.
.Fri and Sat...Aftn and eve tstms possible, especially n and w of
NYC.
.Sun and Mon...VFR.
&&
.MARINE...
Marginal SCA seas will linger on the ocean waters into Thursday
with the easternmost ocean west of Moriches inlet staying up
the longest.
Ahead of another frontal system, Friday night into early
Saturday could have some SCA conditions across the ocean,
particularly east of Fire Island Inlet. Otherwise for other time
periods of the marine long term Friday through Monday night,
mainly below SCA conditions are forecast.
&&
.HYDROLOGY...
No hydrologic problems are anticipated.
&&
.TIDES/COASTAL FLOODING...
A southerly swell and high astronomical tides could produce
local minor coastal flood during this evenings high tide cycles
across the back bays of Brooklyn, southern Queens, and southern
Nassau county, and coastal Fairfield county, and along the
shore of northwestern Suffolk county. A coastal flood statement
remains in effect this evening for those locations.
Potentially more widespread minor coastal flooding could occur
Thursday night and Friday night during high tide cycles as we
approach a full moon. Full moon occurs on Friday. Some locations
that are expected to be impacted are along the South Shore Bays
and the Western Long Island Sound coastlines. Thursday night
could also present some minor coastal flooding during high tide
for some of the coastlines of Lower NY Harbor.
&&
.EQUIPMENT...
NYC NOAA Weather Radio Station KWO35 (162.55 MHz) is undergoing
its final stages of testing, and is operating at full power.
KOKX WSR-88D radar will be down until approximately June 15 for
the pedestal refurbishment.
&&
.OKX WATCHES/WARNINGS/ADVISORIES...
CT...None.
NY...High Rip Current Risk through Thursday evening for NYZ075-080-
081-178-179.
NJ...None.
MARINE...Small Craft Advisory until 6 AM EDT Thursday for ANZ355.
Small Craft Advisory until 2 AM EDT Friday for ANZ350.
Small Craft Advisory until 8 PM EDT Thursday for ANZ353.
&&
SYNOPSIS...JM/DW
NEAR TERM...DW
SHORT TERM...DW
LONG TERM...JM
AVIATION...//
MARINE...JM/DW
HYDROLOGY...JM/DW
TIDES/COASTAL FLOODING...//
EQUIPMENT...//Hazardous Weather Outlook...UPDATED National Weather Service New York NY 429 PM EDT Wed Jun 3 2020 CTZ005-006-009-010-NJZ002-004-006-103>108-NYZ067>074-078-079-176-177- 042030- Northern Fairfield-Northern New Haven-Southern Fairfield- Southern New Haven-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)-Northwestern Suffolk-Northeastern Suffolk- Northern Queens-Northern Nassau- 429 PM EDT Wed Jun 3 2020 This Hazardous Weather Outlook is for southern Connecticut, northeast New Jersey and southeast New York. .DAY ONE...Tonight. There remains the potential for isolated to scattered severe thunderstorms through early this evening. The primary threat is damaging wind gusts. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. No hazardous weather is expected at this time that would meet NWS warning criteria. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed. Please relay any information about observed severe weather to the NWS while following all local, state, and CDC guidelines. && 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. NYZ075-080-081-178-179-042030- Kings (Brooklyn)-Southwestern Suffolk-Southeastern Suffolk- Southern Queens-Southern Nassau- 429 PM EDT Wed Jun 3 2020 ...HIGH RIP CURRENT RISK IN EFFECT THROUGH THURSDAY EVENING... This Hazardous Weather Outlook is for 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. High Rip Current Risk. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. High Rip Current Risk. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed. Please relay any information about observed severe weather to the NWS while following all local, state, and CDC guidelines. && 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. CTZ007-008-011-012-042030- Northern Middlesex-Northern New London-Southern Middlesex- Southern New London- 429 PM EDT Wed Jun 3 2020 This Hazardous Weather Outlook is for southern Connecticut. .DAY ONE...Tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. 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. ANZ330-335-338-340-345-350-353-355-042030- 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- 429 PM EDT Wed Jun 3 2020 This Hazardous Weather Outlook is for Atlantic coastal waters. .DAY ONE...Tonight. Isolated strong to severe thunderstorms will possible across the waters into early this evening. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. 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.
The national radar mosaic for the moment the first event began.
6 thunderstorm wind. Local standard time, as filed.
Two trees reported down on Oakland Court.
Trees reported down with time estimated by radar.
Trees down on Prospect Avenue with time estimated by radar.
Trees down on cars and power lines. Time estimated by radar.
Tree down on a house.
Trees across road. Tree down on wires. Fire Department on scene.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in New York in 2020Every state in 2020This day in weather historyWarnings in New York, June 2020
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: 885692, 885694, 885697, 885699, 885704, 885708.