Thunderstorms produced locally heavy rain in central Delaware on the afternoon of August 9. Rainfall totals were up to 2 to 4 inches.
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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.
Thunderstorms produced locally heavy rain in central Delaware on the afternoon of August 9. Rainfall totals were up to 2 to 4 inches.
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 9, 1:40 PM EST, 20 minutes earlier.
Area Forecast Discussion National Weather Service Mount Holly NJ 240 PM EDT Mon Aug 9 2021 .SYNOPSIS... A surface low off the New Jersey coast will move slowly northeastward just offshore southern New England through Monday night. High pressure will build and persist across much of the eastern U.S. this coming week, with lee surface troughing developing in the Northeast and Mid-Atlantic. A cold front may approach the region by the end of the week. && .NEAR TERM /THROUGH TUESDAY/... A weakening area of low pressure located off the northern NJ coast will continue to meander NEwrd away from the area through Tuesday morning. At mid-lvls the attendant closed low will also pull away from the area this afternoon, with shortwave ridging briefly moving over the area tonight (although some weak convectively-enhanced shortwaves may be embedded in it). Scattered diurnal convection will continue to develop this afternoon, with some limited forcing resulting from low-lvl convergence on the backside of the departing low. Although instability is fairly high (MLCAPE values in excess of 2000 J/kg over Delmarva), very weak flow aloft and gradually decreasing mid-lvl lapse rates should preclude any severe threat. Given Corfidi vector magnitudes of only around 10kts and increasing PWATs/warm cloud depths there could be some localized hydro concerns if any storms were to train along prone areas... but given the anticipated limited storm coverage this threat is very conditional. Overnight there will be the potential for another round of mostly showers (with maybe a few rumbles) as a weak convergence zone sets up near the center of our area in association with a primarily W-E oriented sfc.trough. Lift may also be somewhat enhanced by some very low-amplitude perturbations passing into the mid-lvl ridge axis. Given that the overall forcing is subtle, and mid-lvl heights will actually be rising, am not as bullish on POP/QPF as consensus guidance, and feel that Chc PoPs near the wind shift line are adequate. Additionally we may see some stratus form over the northern half of our area late tonight into Tuesday morning, with this stratus possibly pivoting a little southward by Tuesday AM. Fog should largely be limited to areas sufficiently north of the boundary i.e. the Poconos and associated valleys. Tuesday will feature a more typical summertime setup with warm/moist southerly flow prevailing over the area, between the Bermuda High and the a low passing over the Great Lakes. Highs should reach around 90, and with dewpoints in the low-mid 70s we may approach heat advisory criteria in the urban corridor (heat indices approaching 100 degrees). That being said, it looks fairly borderline at this time and with more substantial heat concerns looking likely later in the week, held off with any products at this time. The storm threat looks to hold off until late in the afternoon (and mostly focused over the west), as the main forcing will be associated with the prefrontal trough well to our west and it remains to be seen if the activity will make it to our area prior to the loss of daytime heating. && .SHORT TERM /TUESDAY NIGHT THROUGH THURSDAY/... The Short Term period begins Tuesday night with a weak mid-level low pushing away from the area. Meanwhile, a low amplitude mid-level trough will push slowly eastward from the Dakotas toward the Great Lakes region through Thursday and closing off over the Hudson bay as it does so. Southwesterly return flow will result beginning Wednesday with subtropical ridging extending from the western Atlantic into the Southeast and strong low pressure across Hudson Bay. A few weak mid-level perturbations and surface troughing developing from southeastern Pennsylvania into the upper Delaware River Valley should be enough to initiate some diurnal showers and thunderstorms both Wednesday and Thursday. Instability should be higher on Thursday however (MLCAPE >2000 J/kg), so I suspect Thursday will see the greatest coverage and intensity of convection. The column will be fairly saturated (not much in the way of dry air layers) and effective shear should remain limited (~20 kts or less), thus the organized severe threat should remain limited. Nevertheless, some water-loaded wet microbursts could be possible with the stronger cells leading to at least some isolated severe potential. The bigger story remains the potential for an extended period of excessive heat and humidity starting Wednesday through the end of the week. Temperatures and dewpoints will be on the rise starting Wednesday amid the southwesterly surface flow with highs in the low to mid 90s for most and dewpoints in the low to mid 70s. Resulting heat indicies Wednesday should climb above 100 degrees away from the coasts and higher terrain and some areas may reach or exceed 105 degrees. By Thursday, the flow turns more westerly introducing more downsloping into the equation and thus temperatures should be a couple degrees warmer with most areas forecast to see highs in the mid 90s. Resulting heat indicies Thursday are forecast to rise into the low to mid 100s. There won't be much relief at night with lows in the low to mid 70s for most. The lack of any low-level dry air leads me to believe there won't be much in the way of dewpoints mixing out unfortunately. This period will need to monitored closely for the potential of heat headlines (Advisories and/or Watches/Warnings), especially for the urban corridor. && .LONG TERM /THURSDAY NIGHT THROUGH SUNDAY/... The mid-level trough axis and associated jet maxima will slowly near and pass north of the area on Friday. An associated cold front will also push toward the area from the north late Friday into Saturday. The GFS appears to be a little too progressive with this feature and thus have trended the forecast toward a slower ECMWF solution. Otherwise, the Long Term forecast remains on track with no major changes made for the weekend forecast. The excessive heat and humidity is forecast to continue through Friday with the cold front slowly approaching from the north and continued low-level westerly flow. Overall, the temperatures and dewpoints appear to be quite similar to Thursday with highs in the mid 90s and forecast heat indicies rising into the low to mid 100s. Have maintained mention of higher end chance to likely PoP for areas along and north/west of I-95 as this will be the area with the greatest forcing and instability for convection. Details of any potential severe weather threat remains a little unclear at this point given differences in the timing of the jet maxima and cold front to the north, but Friday could certainly see a little more widespread coverage of thunderstorms and severe weather potential given the synoptic setup. As the front sags slowly into the area into Saturday and eventually stalls out across the region, chances for showers and thunderstorms will remain for the weekend, although thankfully with more seasonably temperatures. && .AVIATION /19Z MONDAY THROUGH SATURDAY/... The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG, KILG, KMIV, KACY and surrounding areas. Rest of the afternoon... Mostly VFR although a few showers and storms may bring temporary restrictions to some of the terminals, but confidence in timing/locations is too low to include in the TAFs at this time. Winds either light southerly or light and variable. Moderate confidence. Tonight... Some temporarily restrictions possible in showers after midnight, and then some additional restrictions in stratus (mostly KPHL and northward) into Tuesday morning. Winds largely light and variable. Low confidence in southward extent of stratus and also how low Cigs get. Tuesday... Generally VFR once AM stratus clears, some storms possible late in the afternoon at KRDG/KABE. S-SW winds around 10kts. Moderate confidence. Outlook... Wednesday through Friday...Mainly VFR, but scattered showers and thunderstorms are forecast during the afternoon and evening hours which may locally lead to ceiling or visibility restrictions. The greatest coverage of thunderstorms is forecast to be on Friday, especially along and north/west of I-95. Southwesterly winds 5-10 kts during the day and 5 kts or less at night. High confidence on the overall pattern. && .MARINE... Sub-SCA conditions are expected through Tuesday with seas only 2-3ft and generally southerly winds gusting 15-20kts. A few thunderstorms will be possible on the waters (particularly Delaware Bay) this afternoon Outlook... Wednesday through Friday...Sub-advisory conditions area forecast through the remainder of the week. South to southwesterly winds 10- 15 kts with some gusts up to 20 kts possible during the daytime hours. Afternoon and/or evening showers and thunderstorms possible, mainly Friday. Seas 2-3 feet. Rip Currents... There is a low risk of rip currents through Tuesday. && .PHI WATCHES/WARNINGS/ADVISORIES... PA...None. NJ...None. DE...None. MD...None. MARINE...None. && Synopsis...CMS/Deal Near Term...Carr Short Term...Staarmann Long Term...Staarmann Aviation...Carr/Staarmann Marine...Carr/Staarmann
Hazardous Weather Outlook National Weather Service Mount Holly NJ 1103 AM EDT Mon Aug 09 2021 DEZ001-101503- New Castle- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for New Castle County in Delaware. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Hot conditions could result in heat exhaustion with prolonged exposure on Tuesday. Hot conditions could result in heat exhaustion with prolonged exposure on Wednesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Thursday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Friday. 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. DEZ002-101503- Kent- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for Kent County in Delaware. .DAY ONE...Through tonight. Minor coastal flooding is possible. Please go to weather.gov/phi/ehwo for more information on potential weather hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Hot conditions could result in heat exhaustion with prolonged exposure on Thursday. Hot conditions could result in heat exhaustion with prolonged exposure on Friday. 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. DEZ003-101503- Inland Sussex- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for inland portions of Sussex County in Delaware. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Hot conditions could result in heat exhaustion with prolonged exposure on Friday. 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. DEZ004-101503- Delaware Beaches- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for the Atlantic coastal portions of Sussex County in Delaware. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Hot conditions could result in heat exhaustion with prolonged exposure on Thursday. Hot conditions could result in heat exhaustion with prolonged exposure on Friday. 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. PAZ054-101503- Carbon- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for Carbon County in Pennsylvania. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Hot conditions could result in heat exhaustion with prolonged exposure on Thursday. 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. PAZ055-101503- Monroe- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for Monroe County in Pennsylvania. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Hot conditions could result in heat exhaustion with prolonged exposure on Wednesday. Hot conditions could result in heat exhaustion with prolonged exposure on Thursday. 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. PAZ060-101503- Berks- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for Berks County in Pennsylvania. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Hot conditions could result in heat exhaustion with prolonged exposure on Tuesday. Hot conditions could result in heat exhaustion with prolonged exposure on Wednesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Thursday. Hot conditions could result in heat exhaustion with prolonged exposure on Friday. 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. PAZ061-101503- Lehigh- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for Lehigh County in Pennsylvania. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Hot conditions could result in heat exhaustion with prolonged exposure on Wednesday. Hot conditions could result in heat exhaustion with prolonged exposure on Thursday. Hot conditions could result in heat exhaustion with prolonged exposure on Friday. 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. PAZ062-101503- Northampton- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for Northampton County in Pennsylvania. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Hot conditions could result in heat exhaustion with prolonged exposure on Wednesday. Hot conditions could result in heat exhaustion with prolonged exposure on Thursday. Hot conditions could result in heat exhaustion with prolonged exposure on Friday. 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. PAZ070-101503- Delaware- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for Delaware County in Pennsylvania. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Hot conditions could result in heat exhaustion with prolonged exposure on Tuesday. Hot conditions could result in heat exhaustion with prolonged exposure on Wednesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Thursday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Friday. 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. PAZ071-101503- Philadelphia- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for Philadelphia County in Pennsylvania. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Hot conditions could result in heat exhaustion with prolonged exposure on Tuesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Wednesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Thursday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Friday. 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. PAZ101-101503- Western Chester- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for western Chester County in Pennsylvania. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Hot conditions could result in heat exhaustion with prolonged exposure on Tuesday. Hot conditions could result in heat exhaustion with prolonged exposure on Wednesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Thursday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Friday. 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. PAZ102-101503- Eastern Chester- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for eastern Chester County in Pennsylvania. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Hot conditions could result in heat exhaustion with prolonged exposure on Wednesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Thursday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Friday. 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. PAZ103-101503- Western Montgomery- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for western Montgomery County in Pennsylvania. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Hot conditions could result in heat exhaustion with prolonged exposure on Tuesday. Hot conditions could result in heat exhaustion with prolonged exposure on Wednesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Thursday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Friday. 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. PAZ104-101503- Eastern Montgomery- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for eastern Montgomery County in Pennsylvania. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Hot conditions could result in heat exhaustion with prolonged exposure on Tuesday. Hot conditions could result in heat exhaustion with prolonged exposure on Wednesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Thursday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Friday. 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. PAZ105-101503- Upper Bucks- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for upper Bucks County in Pennsylvania. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Hot conditions could result in heat exhaustion with prolonged exposure on Wednesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Thursday. Hot conditions could result in heat exhaustion with prolonged exposure on Friday. 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. PAZ106-101503- Lower Bucks- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for lower Bucks County in Pennsylvania. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Hot conditions could result in heat exhaustion with prolonged exposure on Tuesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Wednesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Thursday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Friday. 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. NJZ001-101503- Sussex- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for Sussex County in New Jersey. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Hot conditions could result in heat exhaustion with prolonged exposure on Wednesday. Hot conditions could result in heat exhaustion with prolonged exposure on Thursday. Hot conditions could result in heat exhaustion with prolonged exposure on Friday. 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. NJZ007-101503- Warren- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for Warren County in New Jersey. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Hot conditions could result in heat exhaustion with prolonged exposure on Wednesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Thursday. Hot conditions could result in heat exhaustion with prolonged exposure on Friday. 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. NJZ008-101503- Morris- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for Morris County in New Jersey. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Hot conditions could result in heat exhaustion with prolonged exposure on Wednesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Thursday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Friday. 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. NJZ009-101503- Hunterdon- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for Hunterdon County in New Jersey. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Hot conditions could result in heat exhaustion with prolonged exposure on Tuesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Wednesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Thursday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Friday. 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. NJZ010-101503- Somerset- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for Somerset County in New Jersey. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Hot conditions could result in heat exhaustion with prolonged exposure on Tuesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Wednesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Thursday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Friday. 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. NJZ012-101503- Middlesex- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for Middlesex County in New Jersey. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Hot conditions could result in heat exhaustion with prolonged exposure on Tuesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Wednesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Thursday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Friday. 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. NJZ013-101503- Western Monmouth- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for western Monmouth County in New Jersey. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Wednesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Thursday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Friday. 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. NJZ014-101503- Eastern Monmouth- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for eastern Monmouth County in New Jersey. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Thursday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Friday. 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. NJZ015-101503- Mercer- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for Mercer County in New Jersey. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Wednesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Thursday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Friday. 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. NJZ016-101503- Salem- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for Salem County in New Jersey. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Hot conditions could result in heat exhaustion with prolonged exposure on Wednesday. Hot conditions could result in heat exhaustion with prolonged exposure on Thursday. Hot conditions could result in heat exhaustion with prolonged exposure on Friday. 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. NJZ017-101503- Gloucester- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for Gloucester County in New Jersey. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Hot conditions could result in heat exhaustion with prolonged exposure on Tuesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Wednesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Thursday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Friday. 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. NJZ018-101503- Camden- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for Camden County in New Jersey. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Hot conditions could result in heat exhaustion with prolonged exposure on Tuesday. Hot conditions could result in heat exhaustion with prolonged exposure on Wednesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Thursday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Friday. 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. NJZ019-101503- Northwestern Burlington- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for northwestern Burlington County in New Jersey. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Hot conditions could result in heat exhaustion with prolonged exposure on Tuesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Wednesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Thursday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Friday. 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. NJZ020-101503- Ocean- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for inland portions of Ocean County in New Jersey. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Hot conditions could result in heat exhaustion with prolonged exposure on Wednesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Thursday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Friday. 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. NJZ021-101503- Cumberland- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for Cumberland County in New Jersey. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Hot conditions could result in heat exhaustion with prolonged exposure on Thursday. Hot conditions could result in heat exhaustion with prolonged exposure on Friday. 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. NJZ022-101503- Atlantic- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for inland portions of Atlantic County in New Jersey. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Hot conditions could result in heat exhaustion with prolonged exposure on Thursday. Hot conditions could result in heat exhaustion with prolonged exposure on Friday. 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. NJZ023-101503- Cape May- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for Cape May County excluding the Atlantic coast in New Jersey. .DAY ONE...Through tonight. The probability for widespread hazardous weather is low. .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. NJZ024-101503- Atlantic Coastal Cape May- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for the Atlantic coastal portions of Cape May County in New Jersey. .DAY ONE...Through tonight. The probability for widespread hazardous weather is low. .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. NJZ025-101503- Coastal Atlantic- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for coastal portions of Atlantic County in New Jersey. .DAY ONE...Through tonight. The probability for widespread hazardous weather is low. .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. NJZ026-101503- Coastal Ocean- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for coastal portions of Ocean County in New Jersey. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Thursday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Friday. 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. NJZ027-101503- Southeastern Burlington- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for southeastern Burlington County in New Jersey. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Hot conditions could result in heat exhaustion with prolonged exposure on Wednesday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Thursday. Dangerously hot conditions could result in heat exhaustion or heat stroke with prolonged exposure on Friday. 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. MDZ012-101503- Kent MD- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for Kent County in Maryland. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Hot conditions could result in heat exhaustion with prolonged exposure on Wednesday. Hot conditions could result in heat exhaustion with prolonged exposure on Thursday. Hot conditions could result in heat exhaustion with prolonged exposure on Friday. 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. MDZ015-101503- Queen Annes- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for Queen Annes County in Maryland. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Hot conditions could result in heat exhaustion with prolonged exposure on Wednesday. Hot conditions could result in heat exhaustion with prolonged exposure on Thursday. Hot conditions could result in heat exhaustion with prolonged exposure on Friday. 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. MDZ019-101503- Talbot- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for Talbot County in Maryland. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Hot conditions could result in heat exhaustion with prolonged exposure on Tuesday. Hot conditions could result in heat exhaustion with prolonged exposure on Wednesday. Hot conditions could result in heat exhaustion with prolonged exposure on Thursday. Hot conditions could result in heat exhaustion with prolonged exposure on Friday. 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. MDZ020-101503- Caroline- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for Caroline County in Maryland. .DAY ONE...Through tonight. There is a low probability of widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Hot conditions could result in heat exhaustion with prolonged exposure on Wednesday. Hot conditions could result in heat exhaustion with prolonged exposure on Thursday. Hot conditions could result in heat exhaustion with prolonged exposure on Friday. 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. ANZ430-101503- Delaware Bay waters north of East Point NJ to Slaughter Beach DE- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for upper Delaware Bay. .DAY ONE...Through tonight. The probability for widespread hazardous weather is low. .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. ANZ431-101503- Delaware Bay waters south of East Point NJ to Slaughter Beach DE- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for lower Delaware Bay. .DAY ONE...Through tonight. The probability for widespread hazardous weather is low. .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. ANZ450-101503- Coastal waters from Sandy Hook to Manasquan Inlet NJ out 20 nm- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for the Atlantic coastal waters adjacent to Monmouth County out 20 nm. .DAY ONE...Through tonight. The probability for widespread hazardous weather is low. .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. ANZ451-101503- Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20 nm- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for the Atlantic coastal waters adjacent to Ocean County out 20 nm. .DAY ONE...Through tonight. The probability for widespread hazardous weather is low. .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. ANZ452-101503- Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out 20 nm- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for the Atlantic coastal waters adjacent to Atlantic County out 20 nm. .DAY ONE...Through tonight. The probability for widespread hazardous weather is low. .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. ANZ453-101503- Coastal waters from Great Egg Inlet to Cape May NJ out 20 nm- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for the Atlantic coastal waters adjacent to Cape May County out 20 nm. .DAY ONE...Through tonight. The probability for widespread hazardous weather is low. .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. ANZ454-101503- Coastal waters from Cape May NJ to Cape Henlopen DE out 20 nm- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for the Atlantic coastal waters adjacent to the mouth of Delaware Bay out 20 nm. .DAY ONE...Through tonight. The probability for widespread hazardous weather is low. .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. ANZ455-101503- Coastal waters from Cape Henlopen to Fenwick Island DE out 20 nm- 1103 AM EDT Mon Aug 09 2021 This Hazardous Weather Outlook is for the Atlantic coastal waters adjacent to Sussex County out 20 nm. .DAY ONE...Through tonight. The probability for widespread hazardous weather is low. .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.
Special Weather Statement
National Weather Service Mount Holly NJ
210 PM EDT Mon Aug 9 2021
DEZ002>004-091900-
Inland Sussex DE-Kent DE-Delaware Beaches DE-
210 PM EDT Mon Aug 9 2021
...Strong thunderstorms will impact portions of central Sussex and
southern Kent Counties through 300 PM EDT...
At 209 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Harrington to near Millville. Movement was
northeast at 20 mph.
HAZARD...Winds in excess of 40 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Georgetown, Milford, Millsboro, Harrington, Lewes, Milton, Dagsboro,
Ellendale, Bowers, Viola, Henlopen Acres, Cape Henlopen State Park,
Big Stone Beach, Andrewsville, Long Neck, Felton, Greenwood,
Frederica, Houston and Dewey Beach.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3875 7554 3893 7574 3898 7573 3904 7564
3906 7539 3876 7504 3851 7520
TIME...MOT...LOC 1809Z 217DEG 16KT 3897 7565 3860 7513
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH
JEOThe Dover AFB radar (KDOX), 16 km away, was scanning. The volume nearest the first event began at 19:00 UTC.
2 flash flood. Local standard time, as filed.
East Liberty Street in Harrington was closed between Delaware Avenue and US Route 13 due to flooding. A water rescue took place on East Liberty Street. Another water rescue occurred on West Street.
Mud Mill Road and Still Road were impassable near Mahan Corner Road to the north of Sandtown.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Delaware in 2021Every state in 2021This day in weather historyWarnings in Delaware, August 2021
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: 965868, 965869.