Someone injured a knee while trying to get away from a rip current.
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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.
Someone injured a knee while trying to get away from a rip current.
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 Aug 23, 2:38 PM EST, 3 hours 22 minutes earlier.
Area Forecast Discussion National Weather Service Mount Holly NJ 338 PM EDT Wed Aug 23 2017 .SYNOPSIS... A cold front will continue to move well south of the region tonight as high pressure begins to build in from the north and west. The high will continue to build over the region through early next week as it slowly shifts eastward, before it finally shifts offshore by mid week. Around the same time, a low pressure system will pass off the East Coast, to the south. && .NEAR TERM /UNTIL 6 AM THURSDAY MORNING/... Remainder of this afternoon...considerable cloudiness for extreme southern NJ and the Delmarva with scattered showers or sprinkles. Otherwise partly to mostly sunny north. Seasonable temps and slowly drying dewpoints. Tonight...Clearing skies and cold air advection with nearly calm or light north to northwest wind will allow temperatures to drop to minimums of 0 to 4 degrees below normal. Forecast is a 50 50 blend of the 12z/23 GFS/NAM MOS. && .SHORT TERM /6 AM THURSDAY MORNING THROUGH 6 PM THURSDAY/... Thursday...Probably a sunny start then considerable cu/sc developing during mid afternoon. Scattered sprinkles are still possible late in the day in ne and e central PA. light northwest to northeast wind. Max temp forecast is normal to 5 below normal. Forecast is a 50 50 blend of the 12z/23 GFS/NAM MOS checked against the 12z/23 ECMWF temps and multi operational model qpf's. && .LONG TERM /THURSDAY NIGHT THROUGH WEDNESDAY/... Overall not much in the way of sensible weather for the long term forecast as strengthening confluence aloft allows surface high pressure to strengthen and build into the area. Forecast soundings suggest perhaps some cumulus development each day, then increasing onshore flow by Sunday as the high passes to the north and low pressure begins to deepen off the Southeast coast. Despite the overall drier air mass, will have to watch for coastal stratus development into early next week with increasing moisture beneath the inversion in onshore flow. Much more uncertainty exists by mid week as low pressure passes well to the south. One scenario if the low passes farther north is some light overrunning precipitation. A more concerning potential scenario to consider is how moisture from the remnants of T.C. Harvey interact with an upper trough expected to move into the area by mid week. Southwest-west flow may advect tropical moisture northeastward, and despite model forecast showing little in the way of QPF at the moment, there is certainly potential for a wet mid-late week. Have edged a little higher than deterministic guidance at this time. Both systems will need to be closely monitored in the week ahead. Temperatures will be close to or a few degrees below normal through mid week. && .AVIATION /19Z WEDNESDAY THROUGH MONDAY/... The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG, KILG, KMIV, KACY and surrounding areas. Rest of this afternoon...VFR with sct-bkn clouds aoa 5000 ft. Generally a light northwest wind with possible gusts 18 kt. Tonight...VFR clear or mostly clear. Light northwest to north wind or calm. Thursday...VFR clear to start, then sct-bkn clouds aoa 5000 ft during the afternoon. Light mostly northwest wind may sea breeze along the coast. Small chance of a sprinkle late in the day vicinity of KRDG/KABE. Outlook... Thursday night through Sunday...VFR. Generally light winds from the N or NW, possibly becoming N-NE on Saturday and Sunday. small chance of a light shower vicinity KABE/KTTN/KRDG Thursday afternoon and Friday afternoon. && .MARINE... No headlines through Thursday. Northwest winds today with spotty southerly sea breezes late this afternoon. Winds become light north overnight and again north to northwest tomorrow morning before sea breezes are seemingly more likely to develop Thursday afternoon. Scattered mostly light showers late this afternoon s tip of NJ and the lower DE waters. Outlook... Thursday night through Saturday...Winds and seas below SCA criteria as high pressure builds across the area. Sunday through Monday...As high pressure moves north of the area then gradually eastward, onshore flow will begin to strengthen. The increasing pressure gradient and prolonged period of onshore flow will resulting in seas building to 5 ft or higher along the S NJ and DE coasts. Rip Currents... Low risk rest of today for the formation of dangerous rip currents as early morning elevated seas are slowly diminishing. Conditions are expected to improve (i.e. the risk should lower) through the afternoon. A northwest wind helps keep this southerly 2 to 3 foot 6 second swell, manageable. Outlook for Thursday through Saturday is currently indicating LOW risk. That doesn't mean NO risk, but REQUIRES sensible decision making for swimmers with the ultimate safety, swimming within the watchful gaze of the life guards. Stay away from jetties/piers. Early next week... the risk for the formation of dangerous rip currents may increase depending on the the actual development- building of 8 second easterly swells && .CLIMATE... KABE monthly rainfall is now 8.34 inches...still ranked #12 for the month of August. The record is 13.47 inches in 2011. && .PHI WATCHES/WARNINGS/ADVISORIES... PA...None. NJ...None. DE...None. MD...None. MARINE...None. && Synopsis...99 Near Term...Drag 338 Short Term...Drag 338 Long Term...99 Aviation...Drag 338 Marine...Drag 338 Climate...338
Hazardous Weather Outlook National Weather Service Mount Holly NJ 229 PM EDT Wed Aug 23 2017 DEZ001>004-MDZ008-012-015-019-020-NJZ001-007>010-012>027-PAZ054-055- 060>062-070-071-101>106-241830- New Castle-Kent-Inland Sussex-Delaware Beaches-Cecil-Kent MD- Queen Annes-Talbot-Caroline-Sussex-Warren-Morris-Hunterdon-Somerset- Middlesex-Western Monmouth-Eastern Monmouth-Mercer-Salem-Gloucester- Camden-Northwestern Burlington-Ocean-Cumberland-Atlantic-Cape May- Atlantic Coastal Cape May-Coastal Atlantic-Coastal Ocean- Southeastern Burlington-Carbon-Monroe-Berks-Lehigh-Northampton- Delaware-Philadelphia-Western Chester-Eastern Chester- Western Montgomery-Eastern Montgomery-Upper Bucks-Lower Bucks- 229 PM EDT Wed Aug 23 2017 This Hazardous Weather Outlook is for central Delaware, northern Delaware, southern 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. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The risk of rip currents is expected to increase early next week for NJ and DE beaches. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. ANZ430-431-450>455-241830- 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- 229 PM EDT Wed Aug 23 2017 This Hazardous Weather Outlook is for Atlantic coastal waters and Delaware Bay Waters. .DAY ONE...This Afternoon and Tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
344 PM EDT WED AUG 23 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1048 PM TSTM WND DMG MEDIA 39.92N 75.39W
08/22/2017 DELAWARE PA EMERGENCY MNGR
12 FOOT TREE LIMB DOWN AT THE DELAWARE COUNTY OEM
BUILDING. TIME ESTIMATED FROM RADAR.
&&
EVENT NUMBER PHI1701565
MEOLAPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
658 PM EDT WED AUG 23 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0945 PM TSTM WND DMG 2 ENE BRECKNOCK TWP 40.24N 75.95W
08/22/2017 BERKS PA BROADCAST MEDIA
ROOF BLOWN OFF A BUILDING AT THE GREEN HILLS AUCTION
CENTER ON ROUTE 568 IN BRECKNOCK TOWNSHIP. SOME OTHER
BUILDINGS IN THE AREA HAD SOME DAMAGE AND TREES WERE
BLOWN OVER. TIME ESTIMATED FROM RADAR.
&&
EVENT NUMBER PHI1701566
GORSEThe national radar mosaic for the moment the first event began.
1 astronomical low tide. Local standard time, as filed.
Someone injured a knee while trying to get away from a rip current. Time unknown.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Delaware in 2017Every state in 2017This day in weather historyWarnings in Delaware, August 2017
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: 709158.