A weak upper level disturbance in association with a cold front lead to the development of severe thunderstorms across Southern Connecticut.
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 weak upper level disturbance in association with a cold front lead to the development of severe thunderstorms across Southern Connecticut.
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 29, 3:49 PM EST, 3 hours 5 minutes earlier.
Area Forecast Discussion National Weather Service New York NY 449 PM EDT Sat Jun 29 2019 .SYNOPSIS... A cold frontal passage occurs tonight, followed by another on Sunday. High pressure builds on Monday followed by a cold front passage on Tuesday. This front will stall to the south before returning as a warm front late in the week. && .NEAR TERM /UNTIL 6 AM SUNDAY MORNING/... LAPS shows that the area is unstable with convective inhibition decreasing. Highest CAPE is across the ern half of the forecast area with numbers around 3000 J/kg. As heights fall into the evening, convective development is expected across the region. Despite the relatively low 0-6km bulk shear of around 30kt, there is enough CAPE for pulse severe, and enough of a balance for some better organized cells as well. Scattered severe thunderstorms will therefore be forecast thru 8pm. The 12z NAM suggested a second round of thunderstorms right ahead of the front later this evening. Chances for rain have been increased as a result. Much will depend on how the next few hours play out. If extensive convection develops, then additional storms are less likely tonight in the worked over airmass. If little to nothing develops thru the early evening, a there will be better chances for thunderstorms and even a severe threat late this evening. Any activity is progged to sweep offshore after midnight as the cold front passes south of Long Island. && .SHORT TERM /6 AM SUNDAY MORNING THROUGH SUNDAY NIGHT/... Cooler on Sunday but a potent h5 low will drop right through the forecast area during the day. The GFS is further west than the NAM with the feature, which leads to some uncertainty with regard to the western extent of the thunderstorm chances. For now, chances range from around 60 in ern CT to around 30 in swrn NJ zones. Downburst potential enhanced by dry adiabatic lapse rates up to h85. Cold temps aloft enhance the hail threat. Any thunderstorms should quickly dissipate in the evening as the upper low exits. The deep mixing will result in wind gusts to around 30kt outside of convection, so a breezy day can be expected. The NBM was nudged up slightly for high temperatures due to the deep mixing, with no changes to the NBM made for Sunday night. && .LONG TERM /MONDAY THROUGH SATURDAY/... A broad upper ridge will dominate the Central US to start the week before flattening out as it migrates east. A series of shortwaves will travel along the ridge pushing fronts across the region into midweek. High pressure at the surface will lead to a dry forecast on Monday. A well-mixed boundary layer support temperatures in the mid 80s. A cold front will then approach Monday evening and move through early Tuesday with a brief round of showers or even a few thunderstorms. The rest of the week looks to be primarily dry. However, a front will linger to the south and with a warm and humid airmass in place, increasing instability could lead to the development of scattered convection both Thursday and Friday. In terms of temperatures, Monday and Tuesday will be in the low to mid 80s, with highs rising into the upper 80s into the end of the week with increasing humidity. && .AVIATION /21Z SATURDAY THROUGH THURSDAY/... A cold front will move across the area late this evening. Expect chances for showers and thunderstorms as it moves through. Showers and storms will be likely through 00z-02z, and moves from northwest to southeast. Conditions then become dry after the frontal passage overnight. Any thunderstorms that develop have the potential to produce strong and gusty W winds at the terminals, some of which may approach 50 kt. Otherwise, winds will be from the W-NW (except S-SW along the coast), and increase into the evening, particularly as the front moves through. Gusts may then briefly subside overnight, before strengthening again by Sunday morning. There will be another chance for afternoon showers and thunderstorms on Sunday as a stronger front moves through. .OUTLOOK FOR 18Z SUNDAY THROUGH THURSDAY... .Sunday afternoon...A chance of MVFR or lower in showers and thunderstorms, mainly east of the NYC terminals. NW gusts 15-25 kt during day. .Monday...VFR. .Tuesday...Slight chance of showers and thunderstorms with MVFR possible. .Wednesday...Mainly VFR. .Thursday...Chance of showers and thunderstorms. && .MARINE... Winds and seas will remain below SCA levels tonight, although scattered strong to severe thunderstorms can be expected. Winds and seas will be at marginal SCA levels on Sunday. The advisory has not been issued with this forecast due to the uncertainty. With a weak gradient thereafter, sub-SCA conditions are expected Monday through Thursday. && .HYDROLOGY... Thunderstorms this afternoon and early evening may produce locally heavy rainfall. Scattered areas of minor urban and poor drainage flooding will be the main threat. No widespread hydrologic impacts are anticipated Sunday through next week. && .TIDES/COASTAL FLOODING... Localized minor coastal flooding possible with the Monday afternoon high tide in the most vulnerable south shore bays and W Li Sound locales with approach of new moon. && .EQUIPMENT... NYC NOAA Weather Radio Station KWO35 (162.55 MHz) remains off the air. && .OKX WATCHES/WARNINGS/ADVISORIES... CT...None. NY...None. NJ...None. MARINE...None. &&
Hazardous Weather Outlook National Weather Service New York NY 402 PM EDT Sat Jun 29 2019 CTZ005>012-NJZ002-004-006-103>108-NYZ067>074-078-079-176-177-302015- 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)-Northwestern Suffolk-Northeastern Suffolk- Northern Queens-Northern Nassau- 402 PM EDT Sat Jun 29 2019 This Hazardous Weather Outlook is for southern Connecticut, northeast New Jersey and southeast New York. .DAY ONE...Tonight. Scattered severe thunderstorms can be expected through this evening. The primary threats are large hail and damaging winds. All thunderstorms will be capable of producing frequent lightning. There is a moderate risk of rip current development at the ocean beaches this afternoon. .DAYS TWO THROUGH SEVEN...Sunday through Friday. An isolated strong to severe thunderstorm is possible Sunday afternoon with a cold frontal passage, especially east of the Hudson River. The main threats will be strong wind gusts and small hail. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to Standard Operating Procedures. ANZ330-335-338-340-345-350-353-355-302015- 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- 402 PM EDT Sat Jun 29 2019 This Hazardous Weather Outlook is for Atlantic coastal waters. .DAY ONE...Tonight. Scattered strong thunderstorms can be expected through this evening. The primary threats are large hail, strong winds and frequent lightning. .DAYS TWO THROUGH SEVEN...Sunday through Friday. An isolated strong thunderstorm is possible Sunday afternoon with a cold frontal passage. The main threats will be strong wind gusts and small hail. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. NYZ075-080-081-178-179-302015- Kings (Brooklyn)-Southwestern Suffolk-Southeastern Suffolk- Southern Queens-Southern Nassau- 402 PM EDT Sat Jun 29 2019 This Hazardous Weather Outlook is for southeast New York. .DAY ONE...Tonight. Scattered severe thunderstorms can be expected through this evening. The primary threats are large hail and damaging winds. All thunderstorms will be capable of producing frequent lightning. .DAYS TWO THROUGH SEVEN...Sunday through Friday. An isolated strong to severe thunderstorm is possible Sunday afternoon with a cold frontal passage. The main threats will be strong wind gusts and small hail. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to Standard Operating Procedures.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW YORK NY
710 PM EDT SAT JUN 29 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0535 PM TSTM WND DMG KENSINGTON 40.65N 73.97W
06/29/2019 KINGS NY SOCIAL MEDIA
LARGE TREE DOWN ON KERMIT PLACE BLOCKING THE ROAD.
&&
DSPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW YORK NY
719 PM EDT SAT JUN 29 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0631 PM MARINE TSTM WIND 26 S ROBERT MOSES STATE 40.25N 73.16W
06/29/2019 M47 MPH ANZ373 NY BUOY
47 MPH OBSERVED AT LONG ISLAND BUOY 44025
&&
DSPRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE NEW YORK NY
728 PM EDT SAT JUN 29 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0350 PM HAIL FARMINGDALE 40.73N 73.45W
06/29/2019 M0.75 INCH NASSAU NY SOCIAL MEDIA
PENNY SIZE HAIL REPORTED
0352 PM HAIL FARMINGDALE 40.73N 73.45W
06/29/2019 E1.25 INCH NASSAU NY SOCIAL MEDIA
HAIL WITH SIZE LARGER THAN A QUARTER REPORTED WITH TIME
ESTIMATED BY RADAR
0356 PM TSTM WND DMG LINDENHURST 40.69N 73.37W
06/29/2019 SUFFOLK NY SOCIAL MEDIA
LARGE TREE BRANCHES DOWN BETWEEN PORCH AND FENCE WITH
TIME ESTIMATED BY RADAR
0510 PM TSTM WND DMG PLAINFIELD 40.62N 74.42W
06/29/2019 UNION NJ LAW ENFORCEMENT
TREES AND BRANCHES REPORTED DOWN AROUND TOWN, TIME
ESTIMATED BY RADAR
0510 PM HAIL ROSE HILL 40.75N 73.98W
06/29/2019 M0.75 INCH NEW YORK (MANHATTA NY SOCIAL MEDIA
0512 PM TSTM WND DMG WESTFIELD 40.65N 74.34W
06/29/2019 UNION NJ SOCIAL MEDIA
TREES REPORTED DOWN IN WESTFIELD
0516 PM TSTM WND DMG 1 WNW PERTH AMBOY JUNCT 40.60N 74.30W
06/29/2019 UNION NJ SOCIAL MEDIA
LARGE TREE BRANCHES DOWN AT THE INTERSECTION OF WEST
INMAN AVENUE AND CORNELL AVENUE BLOCKING THE ROAD WITH
TIME ESTIMATED BY RADAR
0518 PM TSTM WND DMG GREAT KILLS 40.55N 74.15W
06/29/2019 RICHMOND NY SOCIAL MEDIA
TREES DOWN ON POWER LINES AROUND GRAND PLAZA WITH TIME
ESTIMATED BY RADAR
0518 PM TSTM WND DMG UNION 40.70N 74.27W
06/29/2019 UNION NJ SOCIAL MEDIA
LARGE BRANCH OFF A MAGNOLIA TREE BROKEN AND DOWN IN
UNION
0518 PM TSTM WND DMG CRANFORD 40.66N 74.30W
06/29/2019 UNION NJ TRAINED SPOTTER
NUMEROUS TREES AND WIRES DOWN THROUGHOUT CRANFORD WITH
TIME ESTIMATED BY RADAR
0519 PM TSTM WND DMG NEW SPRINGVILLE 40.59N 74.16W
06/29/2019 RICHMOND NY NEWSPAPER
A TREE FELL ON A HOUSE ON WINDHAM LOOP.
0520 PM TSTM WND DMG WESTERLEIGH 40.62N 74.13W
06/29/2019 RICHMOND NY NEWSPAPER
A LARGE TREE WAS BROUGHT DOWN AND BLOCKING MAINE
AVENUE.
0520 PM TSTM WND DMG WESTERLEIGH 40.62N 74.13W
06/29/2019 RICHMOND NY NEWSPAPER
A TREE FELL ONTO A CAR AT CASWELL AVENUE AND LIVERMORE
AVENUE. THE ROAD IS ALSO BLOCKED BY THE DOWNED TREE.
0524 PM TSTM WND DMG 1 NNW BAYONNE 40.67N 74.12W
06/29/2019 HUDSON NJ SOCIAL MEDIA
TREE DOWN ON JOHN F KENNEDY BOULEVARD WITH TIME
ESTIMATED BY RADAR
0525 PM MARINE TSTM WIND BAYONNE 40.66N 74.11W
06/29/2019 M57 MPH HUDSON NJ WXFLOW
0535 PM TSTM WND DMG KENSINGTON 40.65N 73.97W
06/29/2019 KINGS NY SOCIAL MEDIA
LARGE TREE DOWN ON A HOME ON EAST 5TH STREET.
0535 PM TSTM WND DMG KENSINGTON 40.65N 73.97W
06/29/2019 KINGS NY SOCIAL MEDIA
LARGE TREE DOWN ON KERMIT PLACE BLOCKING THE ROAD.
0536 PM MARINE TSTM WIND 8 S SEAGATE 40.47N 74.01W
06/29/2019 M60 MPH ANZ338 NY MESONET
60 MPH OBSERVED AT SANDY HOOK MESONET
0541 PM MARINE TSTM WIND BREEZY POINT 40.56N 73.93W
06/29/2019 M48 MPH QUEENS NY WXFLOW
0610 PM MARINE TSTM WIND 15 S ATLANTIC BEACH EST 40.37N 73.70W
06/29/2019 M53 MPH ANZ355 NY BUOY
53 MPH MEASURED AT NEW YORK HARBOR ENTRANCE BUOY
0630 PM MARINE TSTM WIND POINT O'WOODS 40.65N 73.13W
06/29/2019 M46 MPH SUFFOLK NY WXFLOW
0631 PM MARINE TSTM WIND 26 S ROBERT MOSES STATE 40.25N 73.16W
06/29/2019 M47 MPH ANZ373 NY BUOY
47 MPH OBSERVED AT LONG ISLAND BUOY 44025
&&
JESpecial Weather Statement
National Weather Service New York NY
730 PM EDT Sat Jun 29 2019
CTZ005-009-300000-
Northern Fairfield-Southern Fairfield-
730 PM EDT Sat Jun 29 2019
...A STRONG THUNDERSTORM WILL AFFECT SOUTH CENTRAL FAIRFIELD
COUNTY...
At 730 PM EDT, a strong thunderstorm was located over Wilton, or over
New Canaan, moving southeast at 25 mph.
Winds in excess of 35 mph and pea size hail are possible with this
storm.
Locations impacted include...
Norwalk, New Canaan, Fairfield, Westport, Wilton and Weston.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
LAT...LON 4114 7324 4113 7323 4111 7326 4112 7329
4111 7330 4110 7333 4110 7334 4109 7335
4108 7335 4106 7341 4118 7356 4121 7348
4122 7349 4124 7343
TIME...MOT...LOC 2330Z 301DEG 22KT 4115 7344
JMSpecial Weather Statement
National Weather Service New York NY
742 PM EDT Sat Jun 29 2019
NYZ079-081-300030-
Southeast Suffolk-Northeast Suffolk-
742 PM EDT Sat Jun 29 2019
...A LINE OF STRONG THUNDERSTORMS WILL AFFECT EASTERN SUFFOLK
COUNTY...
At 742 PM EDT, radar indicated strong thunderstorms were located
along a line extending from 6 miles south of Fishers Island to near
East Hampton. Movement was east at 25 mph.
Winds in excess of 40 mph and half inch hail are possible with these
storms.
Locations impacted include...
Sag Harbor, Gardiners Island, Montauk Point, Shelter Island,
Greenport, East Hampton, Hither Hills State Park, Springs, Montauk,
North Haven and Orient.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
LAT...LON 4094 7219 4097 7231 4109 7240 4115 7232
4120 7216 4118 7221 4111 7233 4105 7226
4104 7220 4107 7216 4103 7211 4108 7211
4110 7215 4121 7210 4113 7213 4110 7207
4100 7210 4108 7196 4108 7186 4106 7185
TIME...MOT...LOC 2342Z 290DEG 23KT 4118 7203 4099 7222
JMPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW YORK NY
750 PM EDT SAT JUN 29 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0512 PM TSTM WND DMG 1 S SCOTCH PLAINS 40.62N 74.37W
06/29/2019 UNION NJ SOCIAL MEDIA
A COUPLE OF TREES DOWN AND BRANCHES DOWN IN BACKYARD OF
HOME ALONG RARITAN ROAD
&&
JEThe Brookhaven radar (KOKX), 50 km away, was scanning. The volume nearest the first event began at 23:53 UTC.
4 thunderstorm wind. Local standard time, as filed.
Large branches down off of Interstate 95 between exits 17 and 18 with time estimated by radar.
Large branches down on Island Lane near the West Haven and Milford border.
A thunderstorm wind gust of 60 mph was measured at Lighthouse Point (Elevation of 25 ft.).
Tree split with half of the tree down off of Minor Street with time estimated by radar.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Connecticut in 2019Every state in 2019This day in weather historyWarnings in Connecticut, June 2019
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: 825360, 825358, 826059, 825364.