An approaching trough led to showers and thunderstorms over southern portions of the mid-Atlantic on the afternoon and evening of June 5. While a marginally favorable environment limited the threat of severe weather, a few storms became strong to severe.
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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 PHI wrote it up.
An approaching trough led to showers and thunderstorms over southern portions of the mid-Atlantic on the afternoon and evening of June 5. While a marginally favorable environment limited the threat of severe weather, a few storms became strong to severe.
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 Philadelphia/Mount Holly wrote its last area forecast discussion before the first event at Jun 5, 2:39 PM EST, 1 hour 17 minutes earlier.
Area Forecast Discussion National Weather Service Mount Holly NJ 339 PM EDT Wed Jun 5 2019 .SYNOPSIS... High pressure continues to drift eastward over the Atlantic as low pressure with an associated cold front moves through the Great Lakes. The cold front is forecast to pass through our region on Thursday, followed by high pressure for Friday into the weekend. Broad low pressure and another cold front are expected to approach slowly from the west early in the new week. && .NEAR TERM /UNTIL 6 AM THURSDAY MORNING/... High pressure remains centered over the western Atlantic, and low pressure over the Great Lakes will slowly pass to the north tonight. This will drag a cold front towards the region this evening, but the cold front itself will not cross through until Thursday. Out ahead of the front, some mid-level shortwave energy will spawn a secondary low over the southern Appalachians, and this low will pass through Delmarva and southern New Jersey this evening. A hot, humid, and unstable airmass is over the region, with surface dewpoints well in the 60s throughout, and in the upper 60s to around 70 in southern New Jersey and Delmarva. This is resulting in upwards of 2000 J/kg of MUCAPE and SBCAPE across Delmarva and southern New Jersey, and 500-1000 J/kg across the northern half of New Jersey and into southeast Pennsylvania. PWATs are generally 1.5-1.7 inches in the southern portions of the forecast area, but should climb up to around 2 inches this evening. This sets the stage for a round of potential severe thunderstorms, as well as locally heavy rain. Based on latest trends, the area of heaviest rain would affect Delmarva and southeast New Jersey, where the highest instability and highest dewpoints are. However, latest Flash Flood Guidance values suggests it would take 2-3" of rain in 1 hour; and 3-4 inches of rain in both 3 hours and 6 hours for Flash Flooding to occur. Since storm total QPF is generally on the order of 1-2" (though locally higher amounts are possible), do not think this will lead to flash flooding, so will not issue a Flash Flood Watch. Models are also indicating a potential swath of heavy rain just north of Philadelphia, so it is possible for some urban flooding this evening. Convection is possible in northern new Jersey (north of I-195), the Lehigh Valley, and the southern Poconos, but does not look to be as organized as the convection down south. With loss of diurnal heating after sunset, instability drops off fairly quickly. Heavy rain still possible, but the severe threat drops off. Several waves of showers and thunderstorms will affect mainly the southern half of the forecast area through midnight or so. Once the precip ends, it remains warm and humid into Thursday morning. Fog and stratus likely to develop. Lows tonight in the 60s. && .SHORT TERM /6 AM THURSDAY MORNING THROUGH 6 PM THURSDAY/... Surface cold front slowly works it way across the region on Thursday. However, there does not appear to be much upper level support with its passage. Although it remains quite warm and humid ahead of the front, there may not be much energy with which to work to fire off much convection. Will keep PoPs capped at slight chance to low end chance. Going through the day, cooler and dryer air filters into the region behind the front, but pretty much only for the northern half of the CWA. Highs once again in the mid and upper 80s south and east of I-95, and in the lower 80s north and west. && .LONG TERM /THURSDAY NIGHT THROUGH WEDNESDAY/... Thursday night through Sunday... High pressure will build in to our north through Friday leading to a continuing drying of the airmass with a sky that will generally be mainly clear to partly cloudy. Highs Friday will mostly be in the low 80s however an E/NE flow around the high will keep it a bit cooler along the coast and it will also be a bit cooler over the southern Poconos. Surface high pressure builds S/E from Ontario/Quebec into New England through the course of Friday night and Saturday with an upper level ridge setting up over Ontario. These features should continue to dominate our weather through Saturday leading to plenty of sunshine with seasonable temperatures and comfortable humidity levels. However we will have to keep an eye on a large upper level low with associated tropical moisture and rainfall over the southeastern states but at this point forecast models continue to indicate this should stay suppressed to our south through at least Saturday. Saturday night through Sunday, the upper low over the SE opens up with the upper ridge over the Great Lakes starting to slowly weaken and shift east...becoming centered just off the coast by late Sunday. Expect the area should still remain largely protected by the ridge through with mainly dry weather through the weekend. That said, latest guidance does bring the moisture over the SE a little farther north by late Sunday so will maintain the mention of chance POPs over the Delmarva. Sunday night through Wednesday... In the big picture, the weather pattern becomes more unsettled once again next week as a large upper level trough digs S/E from Canada towards the northeastern US and also interacts with the upper trough and tropical moisture over the SE. Depending on exactly how these features interact, which is currently uncertain, will determine the more specific details of the forecast in terms of how much rain falls and when. However expect increasing chances for showers and thunderstorms by Monday across the area as extensive moisture is advected northward up the coast in a deep layer southerly flow. Still many days out but the concern is the moisture will be of tropical origins with PWATS potentially exceeding 2 inches so any showers/storms could be heavy. Showery/stormy weather has a good chance of continuing Monday night into Tuesday as a frontal zone moving in from the west associated with the Canadian upper level trough interacts with the extensive moisture along the east coast. Main question will be how quickly this moves through and again this will depend, among other things, on the interaction of the digging Canadian / northern stream upper trough with the SE CONUS upper trough. If a wave develops along the front near or just south of the area a more prolonged period of heavy rainfall will be possible around Tuesday or Wednesday of next week as opposed to if it sweeps through faster as a more progressive cold front. && .AVIATION /20Z WEDNESDAY THROUGH MONDAY/... The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG, KILG, KMIV, KACY and surrounding areas. Tonight...SHRA/TSRA with heavy rain this evening, mainly south and east of KPHL. Conditions down to IFR, possibly lower, in TSRA, which could last through around 05Z. Fog/stratus developing thereafter, with conditions falling to IFR or lower. SW winds around 10 kt, possibly gusting to 20 kt, diminishing to 5 kt or less tonight. Thursday...Morning fog/stratus gives way to VFR conditions. Scattered SHRA/TSRA in the afternoon, but confidence is low. West winds 10 kt or less, becoming NW in the afternoon. OUTLOOK... Thursday night...Mainly VFR. Northwest to north wind 5 to 10 knots becoming NE late at night. Friday...VFR. Northeast to east wind around 10 knots. Friday night...Mainly VFR. Northeast to east wind 5 to 10 knots or less. Saturday...VFR. East to southeast wind around 10 knots. Saturday night...Mainly VFR. Northeast to east wind 5 to 10 knots. Sunday...Mainly VFR. East wind around 10 knots. Sunday night through Monday...Increasing clouds with showers and storms possible by Monday along with associated restrictions. SE winds 5-10 knots. && .MARINE... SCA in effect for the coastal ocean waters for tonight and into Thursday afternoon, as southerly winds range from 15-20 kt with 25- 30 kt gusts. Showers and thunderstorms will pass through the waters tonight, with thunderstorm wind gusts in excess of 34 kt possible, as well as torrential rainfall. Winds shift to the W-SW at 10-15 kt late Thursday, and seas subside to 3-4 feet. OUTLOOK... Thursday night through Monday...Wave heights could reach near 5 feet Saturday night into Sunday as E/NE winds increase with gusts to near or just over 20 knots. Otherwise, no marine headlines expected. RIP CURRENTS... There is a moderate risk for the development of dangerous and life threatening rip currents through tonight at the New Jersey and Delaware beaches due to the strong southerly flow. && .PHI WATCHES/WARNINGS/ADVISORIES... PA...None. NJ...None. DE...None. MD...None. MARINE...Small Craft Advisory until 1 PM EDT Thursday for ANZ450>455. && Synopsis...Fitzsimmons Near Term...MPS Short Term...MPS Long Term...Fitzsimmons Aviation...Fitzsimmons/MPS Marine...Fitzsimmons/MPS
Hazardous Weather Outlook National Weather Service Mount Holly NJ 351 PM EDT Wed Jun 5 2019 DEZ001-002-MDZ008-012-015-NJZ001-007>010-012-013-015>023-027-PAZ054- 055-060>062-070-071-101>106-062000- New Castle-Kent-Cecil-Kent MD-Queen Annes-Sussex-Warren-Morris- Hunterdon-Somerset-Middlesex-Western Monmouth-Mercer-Salem- Gloucester-Camden-Northwestern Burlington-Ocean-Cumberland-Atlantic- Cape May-Southeastern Burlington-Carbon-Monroe-Berks-Lehigh- Northampton-Delaware-Philadelphia-Western Chester-Eastern Chester- Western Montgomery-Eastern Montgomery-Upper Bucks-Lower Bucks- 351 PM EDT Wed Jun 5 2019 This Hazardous Weather Outlook is for central Delaware, northern Delaware, northeast Maryland, central New Jersey, northern New Jersey, northwest New Jersey, southern New Jersey, east central Pennsylvania, northeast Pennsylvania and southeast Pennsylvania. .DAY ONE...This afternoon and tonight. Showers and thunderstorms will bring locally heavy rainfall through tonight. There may be some flooding of roadways and areas of poor drainage, along with minor flooding on some small streams and creeks. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. There is a low probability for widespread hazardous weather. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. DEZ004-NJZ014-024>026-062000- Delaware Beaches-Eastern Monmouth-Atlantic Coastal Cape May- Coastal Atlantic-Coastal Ocean- 351 PM EDT Wed Jun 5 2019 This Hazardous Weather Outlook is for southern Delaware, central New Jersey and southern New Jersey. .DAY ONE...This afternoon and tonight. There is a moderate risk for the development of dangerous rip currents. Showers and thunderstorms will bring locally heavy rainfall through tonight. There may be some flooding of roadways and areas of poor drainage. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. There is a low probability for widespread hazardous weather. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. DEZ003-MDZ019-020-062000- Inland Sussex-Talbot-Caroline- 351 PM EDT Wed Jun 5 2019 This Hazardous Weather Outlook is for southern Delaware and northeast Maryland. .DAY ONE...This afternoon and tonight. Showers and thunderstorms will bring locally heavy rainfall through tonight. There may be some flooding of roadways and areas of poor drainage, along with minor flooding on some small streams and creeks. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. There is a low probability for widespread hazardous weather. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. ANZ430-431-450>455-062000- Delaware Bay waters north of East Point NJ to Slaughter Beach DE- Delaware Bay waters south of East Point NJ to Slaughter Beach DE- Coastal waters from Sandy Hook to Manasquan Inlet NJ out 20 nm- Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20 nm- Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out 20 nm- Coastal waters from Great Egg Inlet to Cape May NJ out 20 nm- Coastal waters from Cape May NJ to Cape Henlopen DE out 20 nm- Coastal waters from Cape Henlopen to Fenwick Island DE out 20 nm- 351 PM EDT Wed Jun 5 2019 This Hazardous Weather Outlook is for Atlantic coastal waters and Delaware Bay Waters. .DAY ONE...This afternoon and tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. MPS
Special Weather Statement
National Weather Service Mount Holly NJ
442 PM EDT Wed Jun 5 2019
NJZ021>024-052115-
Cumberland-Atlantic-Atlantic Coastal Cape May-Cape May-
442 PM EDT Wed Jun 5 2019
...A SHOWER WILL AFFECT SOUTHWESTERN ATLANTIC...SOUTHEASTERN
CUMBERLAND AND NORTHWESTERN CAPE MAY COUNTIES...
At 441 PM EDT, a shower was located near Fortesque, or 15 miles south
of Millville, moving northeast at 30 mph.
Wind gusts up to 40 mph are possible with this shower.
Locations impacted include...
Millville, Cumberland, Laurel Lake, Woodbine, Sea Isle City, Estell
Manor, Avalon, Mauricetown, Cape May Court House, Belleplain Forest,
Leesburg, Scotch Bonnet, Port Norris, Dividing Creek, Green Creek,
Dennisville, Bricksboro, Goshen, Port Elizabeth and Bivalve.
If outdoors, consider seeking shelter inside a building.
LAT...LON 3902 7500 3914 7509 3922 7528 3942 7486
3908 7467
TIME...MOT...LOC 2041Z 245DEG 25KT 3918 7514
CMSThe Dover AFB radar (KDOX), 29 km away, was scanning. The volume nearest the first event began at 20:58 UTC.
1 thunderstorm wind. Local standard time, as filed.
Power lines were reported down near Millsboro. Time of event estimated from radar.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Delaware in 2019Every state in 2019This day in weather historyWarnings in Delaware, 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: 829691.