A strong system and associated cold front moved into eastern Pennsylvania, bringing damaging winds and a tornado threat on August 7th.
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 PHI wrote it up.
A strong system and associated cold front moved into eastern Pennsylvania, bringing damaging winds and a tornado threat on August 7th.
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 7, 2:16 PM EST, 2 hours 41 minutes earlier.
Area Forecast Discussion National Weather Service Mount Holly NJ 316 PM EDT Mon Aug 7 2023 .SYNOPSIS... Strong low pressure tracking from the Great Lakes to Ontario brings showers and thunderstorms for Monday, some of which may be severe. The low pulls away into Tuesday and high pressure briefly settles in for the middle part of the week. Another disturbance will arrive Thursday and bring an unsettled pattern to close out the workweek. && .NEAR TERM /THROUGH TUESDAY/... Tornado Watch 605 is now in effect for southeast Pennsylvania, including Philadelphia, Delmarva, and most of New Jersey. Warm front is through much of the area, and is hung up over northern New Jersey. Cold front over the Great Lakes and Ohio Valley continues to approach as low pressure north of Ohio moves into eastern Canada. A significant severe weather outbreak continues to shape up over the local area. Southerly flow continues to usher a warm and humid airmass with surface dew points in the low to mid 70s. with temperatures in the 80s, surface-based CAPE values are already ranging from 2000 to 3000 J/kg in Delmarva, and otherwise 1000 to 2000 J/kg, with values around 1000 J/kg in northern New Jersey and the southern Poconos. Although clouds remain over the area, latest satellite image showing that there are breaks. If even a few hours of heating can occur, then those CAPE values will rise even more, especially in the southern areas. Winds aloft will ramp up, with two areas of 40 kt to 50 kt winds at 850 mb to 500 mb approaching in the 00Z to 03Z time frame, and winds from 925 mb to 850 mb increase to 30 kt to 40 kt. One area move through southeast Pennsylvania and into northern New Jersey, while the other area moves into Delmarva. In addition, 0-3 km Helicity will increase to 100 m^2/s^2 to 200 m^2/s^2. Latest CAMS suggest a line of storms developing from central New York, down through Pennsylvania, and into Maryland and Virginia. This line moves into western counties by 6pm, and works its way east through the evening. CAMS also suggesting the line breaking into two segments, with one area moving into the northern half of New Jersey, and the other moving into Delmarva. Given higher CAPE values in Delmarva, CAMS showing higher reflectivities there. Damaging wind gusts are expected with the stronger storms. Given the high helicity values, cannot rule out isolated tornadoes and large hail. Given the stronger wind speeds aloft, storms should be moving relatively quickly. This would limit the threat for flash flooding, unless there are training of cells. PWATs will be in excess of 2 inches. Torrential rain is expected, so this could lead to localized flash flooding. Will note that 1 hour FFG values from RFC are generally 2.5 to 3 inches, and 3 hour FFG values are 3.5 to 4.5 inches, thus chances for widespread flash flooding are fairly low. The line of storms should be east of the I-95 corridor by 10pm, but storms may continue to pass through Delmarva and southern New Jersey through midnight. Lingering showers and thunderstorms may continue through the overnight, but otherwise, low clouds and patchy fog will develop until winds turn west by Tuesday morning. A tight westerly pressure gradient develops between low pressure over eastern Canada and high pressure building over the Great Lakes, Ohio Valley, and Midwest. Winds will increase to 15 to 20 mph with gusts up to 25 mph during the day. Skies partially clear out. As some shortwave energy associated with an H5 trough passes north of the region Tuesday afternoon, there is a chance for some showers and thunderstorms in northern New Jersey, the Lehigh Valley, and southern Poconos. Highs will be several degrees cooler on Tuesday, generally in the upper 70s to low 80s. Surface dew points will drop into the 60s in the morning, and may even drop into the upper 50s by afternoon due to mixing and those gusty winds. && .SHORT TERM /TUESDAY NIGHT THROUGH WEDNESDAY NIGHT/... As high pressure slides closer and dry air continues to build under northwesterly flow aloft, clouds will push out and give way to mostly clear skies for Tuesday night. The gradient will still remain tight and keep winds elevated overnight, so lows will only dip into the low to mid 60s despite the drier air and clear skies. Surface high pressure slides to our south on Wednesday as brief shortwave ridging passes through in more zonal flow through Wednesday night. Dew points come down to the upper 50s/low 60s with highs in the mid 80s (higher elevations may hold in the upper 70s), so overall looking at a pretty nice day with some diurnal cumulus in the afternoon. Wind will still remain a bit elevated as the gradient relaxes through the day, but shouldn't be quite as windy as Tuesday. Lows Wednesday night will fall to the low 60s. The downside to the west-east flow is that the dry period looks to quickly give way to an unsettled end to the week as an upper trough and surface low slide by. && .LONG TERM /THURSDAY THROUGH MONDAY/... A shortwave will dig into the Ohio Valley on Thursday with low pressure downstream. Flow aloft will still remain more zonal, so features should be quick to move through. At the surface, southerly return flow will set up and increase dew points back into the 70s as the column moistens. The first half of Thursday will be dry but precip will move in from the west in the afternoon and evening. Timing depends on the amplitude of the upper trough and how quickly the surface low arrives, and there is still some discrepancy with the GFS/ECMWF favoring a deeper trough with a flatter GEM solution. Thinking that NBM PoPs are introducing precip too early so have delayed the onset until primarily after 12z with the highest chances later in the afternoon/evening which better matches recent trends of the global guidance. The unsettled pattern will continue through the weekend as another upper trough swings through the Great Lakes. Most of Friday looks to be dry with some flat shortwave ridging briefly taking hold ahead of the trough. Another low pressure system will drag a cold front through over the weekend, perhaps late day Saturday very early Sunday, but forecast confidence is increasingly lower at this time, so primarily held with continuity/NBM which maintains the 20-30% chance of rain for the second half of Saturday into Sunday morning. The ensembles then hold upper troughing in place across the Northeast into early next week. Temperatures look to be near normal through the weekend. && .AVIATION /19Z MONDAY THROUGH SATURDAY/... The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG, KILG, KMIV, KACY and surrounding areas. This afternoon (18Z through 21Z)...MVFR CIGs should lift to VFR during this time. S winds 5 to 10 kt, though gusts to 20 kt possible. Moderate confidence. This evening (21Z through 06Z)...SHRA/TSRA will impact terminals starting from 20Z to 22Z at KRDG/KABE, 22Z to 02Z over the I-95 corridor terminals, and then 00Z to 04Z at KMIV and KACY. Will TEMPO +TSRA with gusts to 40 kt, though the strongest storms will be capable of 50 kt to 60 kt gusts, should they pass directly over a terminal. Cannot rule out large hail or even a tornado. S winds 10 to 15 kt with 20 to 25 kt gusts. Moderate confidence overall. Rest of tonight (06Z through 12Z)...SHRA/TSRA taper off. Restrictions in stratus and fog with MVFR/IFR CIGs/VSBYs. S winds 5 to 10 kt. Moderate confidence. Tuesday (12Z through 00Z)...VFR conditions by 15Z or so. SW winds 5 to 10 kt become W-NW 10 to 15 kt with 20 to 25 kt gusts. High confidence. Outlook... Wednesday...VFR. Westerly wind around 10 knots with gusts to 20 knots. Moderate confidence. Thursday...Scattered showers may result in periods of sub-VFR conditions. Southwesterly wind 10-15 knots. Low confidence. Friday...Some lingering sub-VFR conditions with showers in the morning, otherwise VFR expected. Northwesterly wind 5-10 knots. Low confidence. && .MARINE... South winds 15 to 20 kt into this evening. There may be a few gusts to 25 kt, but outside of convection, not expecting widespread 25+ kt gusts. Seas will be 3 to 4 feet. Strong to severe thunderstorms with damaging winds and possible waterspouts will affect the waters late this afternoon through tonight. Storms should taper off after midnight. S winds 10 to 15 kt. Seas 3 to 4 feet. VSBY restrictions in fog possible late. Tuesday will feature gusty west winds. A Small Craft Advisory may be needed for 25 kt gusts. Seas will average 3 to 4 feet. Outlook... Wednesday...Small Craft Advisory conditions possible. Westerly wind 15-20 knots with gusts to 20-25 knots in the morning relaxing in the afternoon to 10-15 knots. Seas 3-5 feet subsiding to 2-4 feet. Thursday...No marine headlines expected. Southerly wind 10-15 knots with gusts to 20 knots. Seas 2-3 feet. Friday...No marine headlines expected. Southerly wind around 10 knots. Seas 2-3 feet. Rip currents... For the rest of today, there is a MODERATE risk for the development of dangerous rip currents for the New Jersey and Delaware beaches. By Tuesday, winds will shift to offshore, so should see gradually improving conditions, but due to the elevated surf may see one more day of MODERATE conditions at NJ, while DE is currently forecast to be LOW. && .PHI WATCHES/WARNINGS/ADVISORIES... PA...None. NJ...None. DE...None. MD...None. MARINE...None. && SYNOPSIS...Brudy NEAR TERM...MPS SHORT TERM...Brudy/Deal LONG TERM...Brudy/Deal AVIATION...Brudy/Dodd/MPS MARINE...Brudy/Dodd/MPS
Hazardous Weather Outlook National Weather Service Mount Holly NJ 0500 PM EDT Mon Aug 07 2023 DEZ001-082100- New Castle- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for New Castle County in Delaware. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Numerous severe thunderstorms are expected. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. DEZ002-082100- Kent- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for Kent County in Delaware. .DAY ONE...Through tonight. Numerous severe thunderstorms are expected. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. DEZ003-082100- Inland Sussex- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for inland portions of Sussex County in Delaware. .DAY ONE...Through tonight. Numerous severe thunderstorms are expected. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. DEZ004-082100- Delaware Beaches- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for the Atlantic coastal portions of Sussex County in Delaware. .DAY ONE...Through tonight. There is a moderate risk of rip currents. Numerous severe thunderstorms are expected. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. PAZ054-082100- Carbon- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for Carbon County in Pennsylvania. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Numerous severe thunderstorms are expected. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. PAZ055-082100- Monroe- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for Monroe County in Pennsylvania. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Numerous severe thunderstorms are expected. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. PAZ060-082100- Berks- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for Berks County in Pennsylvania. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Numerous severe thunderstorms are expected. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. PAZ061-082100- Lehigh- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for Lehigh County in Pennsylvania. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Numerous severe thunderstorms are expected. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. PAZ062-082100- Northampton- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for Northampton County in Pennsylvania. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Numerous severe thunderstorms are expected. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. PAZ070-082100- Delaware- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for Delaware County in Pennsylvania. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Numerous severe thunderstorms are expected. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. PAZ071-082100- Philadelphia- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for Philadelphia County in Pennsylvania. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Numerous severe thunderstorms are expected. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. PAZ101-082100- Western Chester- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for western Chester County in Pennsylvania. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Numerous severe thunderstorms are expected. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. PAZ102-082100- Eastern Chester- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for eastern Chester County in Pennsylvania. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Numerous severe thunderstorms are expected. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. PAZ103-082100- Western Montgomery- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for western Montgomery County in Pennsylvania. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Numerous severe thunderstorms are expected. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. PAZ104-082100- Eastern Montgomery- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for eastern Montgomery County in Pennsylvania. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Numerous severe thunderstorms are expected. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. PAZ105-082100- Upper Bucks- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for upper Bucks County in Pennsylvania. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Numerous severe thunderstorms are expected. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. PAZ106-082100- Lower Bucks- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for lower Bucks County in Pennsylvania. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Numerous severe thunderstorms are expected. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. NJZ001-082100- Sussex- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for Sussex County in New Jersey. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Numerous severe thunderstorms are expected. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. NJZ007-082100- Warren- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for Warren County in New Jersey. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Numerous severe thunderstorms are expected. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. NJZ008-082100- Morris- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for Morris County in New Jersey. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Numerous severe thunderstorms are expected. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. NJZ009-082100- Hunterdon- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for Hunterdon County in New Jersey. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Numerous severe thunderstorms are expected. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. NJZ010-082100- Somerset- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for Somerset County in New Jersey. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Numerous severe thunderstorms are expected. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. NJZ012-082100- Middlesex- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for Middlesex County in New Jersey. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Numerous severe thunderstorms are expected. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. NJZ013-082100- Western Monmouth- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for western Monmouth County in New Jersey. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Numerous severe thunderstorms are expected. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. NJZ014-082100- Eastern Monmouth- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for eastern Monmouth County in New Jersey. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. There is a moderate risk of rip currents. Scattered severe thunderstorms are possible. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. There is a moderate risk of rip currents on Tuesday. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. NJZ015-082100- Mercer- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for Mercer County in New Jersey. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Numerous severe thunderstorms are expected. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. NJZ016-082100- Salem- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for Salem County in New Jersey. .DAY ONE...Through tonight. Numerous severe thunderstorms are expected. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. NJZ017-082100- Gloucester- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for Gloucester County in New Jersey. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Numerous severe thunderstorms are expected. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. NJZ018-082100- Camden- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for Camden County in New Jersey. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Numerous severe thunderstorms are expected. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. NJZ019-082100- Northwestern Burlington- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for northwestern Burlington County in New Jersey. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Numerous severe thunderstorms are expected. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. NJZ020-082100- Ocean- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for inland portions of Ocean County in New Jersey. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Scattered severe thunderstorms are possible. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. NJZ021-082100- Cumberland- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for Cumberland County in New Jersey. .DAY ONE...Through tonight. Numerous severe thunderstorms are expected. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. NJZ022-082100- Atlantic- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for inland portions of Atlantic County in New Jersey. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Numerous severe thunderstorms are expected. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. NJZ023-082100- Cape May- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for Cape May County excluding the Atlantic coast in New Jersey. .DAY ONE...Through tonight. Numerous severe thunderstorms are expected. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. NJZ024-082100- Atlantic Coastal Cape May- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for the Atlantic coastal portions of Cape May County in New Jersey. .DAY ONE...Through tonight. There is a moderate risk of rip currents. Numerous severe thunderstorms are expected. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. There is a moderate risk of rip currents on Tuesday. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. NJZ025-082100- Coastal Atlantic- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for coastal portions of Atlantic County in New Jersey. .DAY ONE...Through tonight. There is a high risk of rip currents. Scattered severe thunderstorms are possible. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. There is a moderate risk of rip currents on Tuesday. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. NJZ026-082100- Coastal Ocean- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for coastal portions of Ocean County in New Jersey. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. There is a moderate risk of rip currents. Scattered severe thunderstorms are possible. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. There is a moderate risk of rip currents on Tuesday. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. NJZ027-082100- Southeastern Burlington- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for southeastern Burlington County in New Jersey. .DAY ONE...Through tonight. Several instances of flooding are possible, especially in urban and poor-drainage areas and near vulnerable small creeks and streams. Numerous severe thunderstorms are expected. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. MDZ012-082100- Kent MD- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for Kent County in Maryland. .DAY ONE...Through tonight. Numerous severe thunderstorms are expected. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. MDZ015-082100- Queen Annes- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for Queen Annes County in Maryland. .DAY ONE...Through tonight. Numerous severe thunderstorms are expected. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. MDZ019-082100- Talbot- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for Talbot County in Maryland. .DAY ONE...Through tonight. Numerous severe thunderstorms are expected. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. MDZ020-082100- Caroline- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for Caroline County in Maryland. .DAY ONE...Through tonight. Numerous severe thunderstorms are expected. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. ANZ430-082100- Delaware Bay waters north of East Point NJ to Slaughter Beach DE- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for upper Delaware Bay. .DAY ONE...Through tonight. Numerous severe thunderstorms are expected. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. ANZ431-082100- Delaware Bay waters south of East Point NJ to Slaughter Beach DE- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for lower Delaware Bay. .DAY ONE...Through tonight. Numerous severe thunderstorms are expected. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. ANZ450-082100- Coastal waters from Sandy Hook to Manasquan Inlet NJ out 20 nm- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for the Atlantic coastal waters adjacent to Monmouth County out 20 nm. .DAY ONE...Through tonight. Scattered severe thunderstorms are possible. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. ANZ451-082100- Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20 nm- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for the Atlantic coastal waters adjacent to Ocean County out 20 nm. .DAY ONE...Through tonight. Scattered severe thunderstorms are possible. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. ANZ452-082100- Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out 20 nm- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for the Atlantic coastal waters adjacent to Atlantic County out 20 nm. .DAY ONE...Through tonight. Scattered severe thunderstorms are possible. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. ANZ453-082100- Coastal waters from Great Egg Inlet to Cape May NJ out 20 nm- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for the Atlantic coastal waters adjacent to Cape May County out 20 nm. .DAY ONE...Through tonight. Scattered severe thunderstorms are possible. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. ANZ454-082100- Coastal waters from Cape May NJ to Cape Henlopen DE out 20 nm- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for the Atlantic coastal waters adjacent to the mouth of Delaware Bay out 20 nm. .DAY ONE...Through tonight. Numerous severe thunderstorms are expected. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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. ANZ455-082100- Coastal waters from Cape Henlopen to Fenwick Island DE out 20 nm- 0500 PM EDT Mon Aug 07 2023 This Hazardous Weather Outlook is for the Atlantic coastal waters adjacent to Sussex County out 20 nm. .DAY ONE...Through tonight. Numerous severe thunderstorms are expected. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. 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.
The Dover AFB radar (KDOX), 117 km away, was scanning. The volume nearest the first event began at 21:55 UTC.
29 thunderstorm wind, 1 funnel cloud, 1 tornado. Local standard time, as filed.
Report of multiple large trees down in Oxford, PA on social media. Time estimated via radar.
Report on social media of trees down and power outages in Cochranville. Time estimated via radar.
A 911 Call Center received multiple reports of down trees in Kennett Square and New Garden Township. Time estimated from radar.
An EM reported a funnel cloud near Coatesville. Time given in report.
Report of trees and wires down around Governor Markham Drive in Concord Township. Time estimated from radar.
Report of multiple trees snapped in Glen Mills on social media. Times estimated via radar.
Tree limbs down on Hansell Road. Time estimated from radar.
A 68 MPH gust measured by trained spotter. Time given in report.
Tree Down into house. Time estimated from radar.
Report of multiple trees down in Haverford on social media. Photo on social media of a tree down on a car. Time estimated via radar.
Report of multiple trees down across Drexel Hill on social media. Time estimated via radar.
Large tree down on I-76 Eastbound with a lane blockage. Time estimated from radar.
Pictures of extensive tree damage in Chestnut Hill. Time estimated from radar.
Pictures of extensive tree damage in Chestnut Hill. Time estimated from radar.
Report of tree down in Roxborough on social media. Power outages also being reported. Time estimated via radar.
Report of tree down on 2nd and Morris Street in South Philadelphia on social media. Photo included. Time based on radar.
New Hanover Road closed due to downed power lines. Time estimated via radar.
Trees down in the Upper Roxborough section of Philadelphia. Time estimated from radar.
Trees and wires down in the Lyons and Rockland Township area. Time estimated from radar.
Cheltenham Road at Keenan Street closed due to downed trees. Time estimated from radar.
Davis Grove Road at Park Road closed due to downed tree. Time estimated from radar.
Video shared on social media with trees down in Breinigsville. Time estimated via radar.
A 911 Call Center received reports of downed trees on wires in Penn Forest Township. Time estimated from radar.
Report of tree down in Upper Milford Twp on social media. Time estimated via radar.
Weather station blew over. Trained spotter estimated 60-70 mph gusts. Time given in report.
Large tree fell on a house with some structural damage. No injuries. Report via social media, with photos. Time estimated via radar.
On the evening of August 7th, an EF-1 tornado occurred, primarily in the Midway Manor neighborhood of Allentown, Pennsylvania. The tornado began near East Pennsylvania Street between North Ulster Street and North Van Buren Street. At this location, damage to the roof of a church and a neighboring shed was seen with multiple shingles removed and displaced. A large hardwood tree was also uprooted in this area, falling to the north as it was uprooted. The tornado then continued to the northeast towards East Lily Street and North Wahneta Street causing sporadic tree damage along the way. As the tornado crossed North Wahneta Street, the amount of damage began to increase with a shed removed from its foundation and tossed about 50 feet northwest. Multiple trees were uprooted or snapped in this area as well. As the tornado continued to the northeast, approaching and crossing East Fairmont Street, it reached its maximum width, around 160 yards. It is also reached its maximum intensity, causing damage to multiple homes. The greatest damage was to homes along the west side of Club Avenue, where multiple homes lost between 30 and 50 percent of their roof covering. One home had a front porch awning taken off the east side of the house, lofted, then landed about 100 feet away in the backyard of a house two doors down. Additionally, damaged crops in the backyard of a home where fallen in a manner consistent with a convergent wind pattern. The tornado continued northeast across Club Avenue, crossing into Bethlehem, Pennsylvania. Here, the tornado began to weaken, but still snapped or took large branches down on multiple trees. The tornado then dissipated as it approached Pennsylvania Avenue. No known injuries or fatalities occurred with this tornado.
A 911 Call Center received multiple reports of down trees in Hamilton Township, PA. Time estimated from radar.
A 911 Call Center received multiple reports of down trees in Stroud Township. Time estimated from radar.
A 911 Call Center received multiple reports of down trees in Pocono Township. Time estimated from radar.
Pictures sent in of extensive straight-line wind damage in the Fox Chase Community in Jackson Township, PA. Time estimated from radar.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Pennsylvania in 2023Every state in 2023This day in weather historyThe tornado archive for Pennsylvania, 2023Warnings in Pennsylvania, August 2023
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: 1134715, 1134716, 1134717, 1134718, 1134719, 1134720, 1134721, 1134722, 1134723, 1134724, 1134725, 1134726, 1134727, 1134728, 1134729, 1134730, 1134731, 1134732, 1134733, 1134734, 1134735, 1134736, 1134737, 1134738, 1134739, 1134740, 1134741, 1134742, 1134743, 1134745, 1134746.