Alert archive / Pennsylvania / Areal Flood Advisories in 2019

Areal Flood Advisory 169, NWS Philadelphia/Mount Holly

July 22, 2019Hunterdon County, Warren County, New Jersey; 6 counties in Pennsylvania

NWS Philadelphia/Mount Holly issued this areal flood advisory at Jul 22, 2019, 4:11 PM EDT for Hunterdon County, Warren County, New Jersey; 6 counties in Pennsylvania. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Jul 22, 2019, 4:11 PM EDT (20:11 UTC)
Expired
Jul 22, 2019, 8:15 PM EDT
In force
4 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon

Counties Hunterdon County, NJ, Warren County, NJ, Berks County, PA, Bucks County, PA, Chester County, PA, Lehigh County, PA, Montgomery County, PA, Northampton County, PA

The radar

The Philadelphia radar (KDIX), 100 km from the middle of the area, began a volume at 20:12 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 8.2 hours before the alert went out and 216 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Brookhaven, NY at 12:00Z on 2019-07-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2019-07-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 27 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1598 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
27 m²/s²
0-3 km storm-relative helicity
109 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood advisory went out, 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 this areal flood advisory went out at Jul 22, 4:04 PM EDT, 7 minutes earlier.

Area forecast discussion, Jul 22, 4:04 PM EDT, 7 minutes before
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Hazardous weather outlook, Jul 22, 2:33 PM EDT, 1 hour 38 minutes before
Hazardous Weather Outlook
National Weather Service Mount Holly NJ
233 PM EDT Mon Jul 22 2019

NJZ001-007>010-PAZ054-055-060>062-101-103-105-231845-
Sussex-Warren-Morris-Hunterdon-Somerset-Carbon-Monroe-Berks-Lehigh-
Northampton-Western Chester-Western Montgomery-Upper Bucks-
233 PM EDT Mon Jul 22 2019

...FLASH FLOOD WATCH IN EFFECT THROUGH TUESDAY MORNING...
...SEVERE THUNDERSTORM WATCH 538 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...

This Hazardous Weather Outlook is for northern New Jersey,
northwest New Jersey, east central Pennsylvania, northeast
Pennsylvania and southeast Pennsylvania.

.DAY ONE...This afternoon and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flash Flood Watch.
   Severe Thunderstorm Watch.

Thunderstorms this afternoon and evening could produce severe
weather with damaging winds and torrential downpours being the
biggest threats.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flash Flood Watch.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

DEZ001>003-MDZ008-012-015-019-020-NJZ016-021-023-PAZ102-231845-
New Castle-Kent-Inland Sussex-Cecil-Kent MD-Queen Annes-Talbot-
Caroline-Salem-Cumberland-Cape May-Eastern Chester-
233 PM EDT Mon Jul 22 2019

...HEAT ADVISORY IN EFFECT UNTIL 7 PM EDT THIS EVENING...
...FLASH FLOOD WATCH IN EFFECT THROUGH TUESDAY MORNING...
...SEVERE THUNDERSTORM WATCH 538 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...

This Hazardous Weather Outlook is for central Delaware, northern
Delaware, southern Delaware, northeast Maryland, southern New
Jersey and southeast Pennsylvania.

.DAY ONE...This afternoon and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flash Flood Watch.
   Heat Advisory.
   Severe Thunderstorm Watch.

Thunderstorms this afternoon and evening could produce severe
weather with damaging winds and torrential downpours being the
biggest threats.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flash Flood Watch.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ014-025-026-231845-
Eastern Monmouth-Coastal Atlantic-Coastal Ocean-
233 PM EDT Mon Jul 22 2019

...FLASH FLOOD WATCH IN EFFECT THROUGH TUESDAY MORNING...
...SEVERE THUNDERSTORM WATCH 538 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...

This Hazardous Weather Outlook is for central New Jersey and
southern New Jersey.

.DAY ONE...This afternoon and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flash Flood Watch.
   Severe Thunderstorm Watch.

Thunderstorms this afternoon and evening could produce severe
weather with damaging winds and torrential downpours being the
biggest threats.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flash Flood Watch.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ024-231845-
Atlantic Coastal Cape May-
233 PM EDT Mon Jul 22 2019

...HEAT ADVISORY IN EFFECT UNTIL 7 PM EDT THIS EVENING...
...FLASH FLOOD WATCH IN EFFECT THROUGH TUESDAY MORNING...
...SEVERE THUNDERSTORM WATCH 538 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...

This Hazardous Weather Outlook is for southern New Jersey.

.DAY ONE...This afternoon and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flash Flood Watch.
   Heat Advisory.
   Severe Thunderstorm Watch.

Thunderstorms this afternoon and evening could produce severe
weather with damaging winds and torrential downpours being the
biggest threats.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flash Flood Watch.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

DEZ004-231845-
Delaware Beaches-
233 PM EDT Mon Jul 22 2019

...HEAT ADVISORY IN EFFECT UNTIL 7 PM EDT THIS EVENING...
...FLASH FLOOD WATCH IN EFFECT THROUGH TUESDAY MORNING...
...SEVERE THUNDERSTORM WATCH 538 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...

This Hazardous Weather Outlook is for southern Delaware.

.DAY ONE...This afternoon and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flash Flood Watch.
   Heat Advisory.
   Severe Thunderstorm Watch.

Thunderstorms this afternoon and evening could produce severe
weather with damaging winds and torrential downpours being the
biggest threats.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flash Flood Watch.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

ANZ430-431-450>455-231845-
Delaware Bay waters north of East Point NJ to Slaughter Beach DE-
Delaware Bay waters south of East Point NJ to Slaughter Beach DE-
Coastal waters from Sandy Hook to Manasquan Inlet NJ out 20 nm-
Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20 nm-
Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out 20 nm-
Coastal waters from Great Egg Inlet to Cape May NJ out 20 nm-
Coastal waters from Cape May NJ to Cape Henlopen DE out 20 nm-
Coastal waters from Cape Henlopen to Fenwick Island DE out 20 nm-
233 PM EDT Mon Jul 22 2019

...SEVERE THUNDERSTORM WATCH 538 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...

This Hazardous Weather Outlook is for Atlantic coastal waters and
Delaware Bay Waters.

.DAY ONE...This afternoon and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Severe Thunderstorm Watch.

Thunderstorms this afternoon and evening could produce wind gusts in
excess of 35 knots.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

There is a low probability for widespread hazardous weather.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ015-017>019-PAZ070-071-104-106-231845-
Mercer-Gloucester-Camden-Northwestern Burlington-Delaware-
Philadelphia-Eastern Montgomery-Lower Bucks-
233 PM EDT Mon Jul 22 2019

...HEAT ADVISORY IN EFFECT UNTIL 7 PM EDT THIS EVENING...
...FLASH FLOOD WATCH IN EFFECT THROUGH TUESDAY MORNING...
...SEVERE THUNDERSTORM WATCH 538 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...

This Hazardous Weather Outlook is for central New Jersey, southern
New Jersey and southeast Pennsylvania.

.DAY ONE...This afternoon and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flash Flood Watch.
   Heat Advisory.
   Severe Thunderstorm Watch.

Thunderstorms this afternoon and evening could produce severe
weather with damaging winds and torrential downpours being the
biggest threats.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flash Flood Watch.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ012-013-020-022-027-231845-
Middlesex-Western Monmouth-Ocean-Atlantic-Southeastern Burlington-
233 PM EDT Mon Jul 22 2019

...FLASH FLOOD WATCH IN EFFECT THROUGH TUESDAY MORNING...
...SEVERE THUNDERSTORM WATCH 538 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...

This Hazardous Weather Outlook is for central New Jersey, northern
New Jersey and southern New Jersey.

.DAY ONE...This afternoon and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flash Flood Watch.
   Severe Thunderstorm Watch.

Heat index values in the upper 90s to around 100 degrees are
expected from late this morning to late this afternoon.

Thunderstorms this afternoon and evening could produce severe
weather with damaging winds and torrential downpours being the
biggest threats.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flash Flood Watch.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

In the hours before

Special weather statement, Jul 22, 3:18 PM EDT, 53 minutes before
Special Weather Statement
National Weather Service Mount Holly NJ
318 PM EDT Mon Jul 22 2019

DEZ001-MDZ008-PAZ101-102-222015-
New Castle-Cecil-Western Chester-Eastern Chester-
318 PM EDT Mon Jul 22 2019

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT NORTHWESTERN NEW
CASTLE...NORTHERN CECIL AND CHESTER COUNTIES...

At 317 PM EDT, radar indicated strong thunderstorms were located
along a line extending from near Homeville to Rock Springs to near
Delta. Movement was northeast at 35 mph.

Wind gusts up to 50 mph are possible with these storms.

Locations impacted include...
West Chester, Calvert, Coatesville, Westtown, Downingtown, Kennett
Square, Oxford, Parkesburg, West Grove, Rising Sun, Honey Brook,
Elverson, Glen Roy, Blake, West Nottingham, Pughtown, Mount Vernon,
Marshallton, Greenville and Lombard.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 3972 7619 3973 7611 3987 7599 3995 7600
      4004 7593 4011 7594 4021 7575 4024 7567
      3996 7552 3988 7559 3984 7559 3984 7558
      3974 7562 3964 7616 3969 7622
TIME...MOT...LOC 1917Z 242DEG 31KT 3989 7604 3973 7616 3966 7627

Meola
Local storm report, Jul 22, 3:30 PM EDT, 41 minutes before
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Local storm report, Jul 22, 3:31 PM EDT, 40 minutes before
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Local storm report, Jul 22, 3:36 PM EDT, 35 minutes before
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Special weather statement, Jul 22, 3:39 PM EDT, 32 minutes before
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Local storm report, Jul 22, 4:03 PM EDT, 8 minutes before
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The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 21, 8:25 PM EDTSpecial Weather StatementPHIWarren50 min
Jul 21, 8:44 PM EDTSevere Thunderstorm WarningPHIWarren46 min
Jul 21, 9:05 PM EDTSpecial Weather StatementPHIMorris25 min
Jul 21, 9:24 PM EDTSevere Thunderstorm WarningPHIHunterdon, Morris, Somerset, Warren51 min
Jul 21, 10:12 PM EDTSevere Thunderstorm WarningPHIHunterdon, Middlesex, Monmouth, Morris, Somerset48 min
Jul 21, 10:13 PM EDTSevere Thunderstorm WarningPHISalem47 min
Jul 21, 10:15 PM EDTSpecial Marine WarningPHI60 min
Jul 21, 10:54 PM EDTSevere Thunderstorm WarningPHIGloucester, Salem25 min
Jul 21, 10:58 PM EDTSpecial Marine WarningPHI62 min
Jul 21, 11:02 PM EDTSevere Thunderstorm WarningPHIMonmouth31 min
Jul 21, 11:27 PM EDTSevere Thunderstorm WarningPHIMonmouth, Ocean48 min
Jul 21, 11:31 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden44 min
Jul 21, 11:40 PM EDTSevere Thunderstorm WarningPHIHunterdon, Warren50 min
Jul 21, 11:54 PM EDTSevere Thunderstorm WarningPHIBurlington, Monmouth, Ocean51 min
Jul 22, 12:00 AM EDTSpecial Marine WarningPHI90 min
Jul 22, 12:16 AM EDTSpecial Weather StatementPHIMercer29 min
Jul 22, 12:34 AM EDTSevere Thunderstorm WarningPHIMonmouth, Ocean41 min
Jul 22, 1:50 PM EDTSpecial Weather StatementPHIWarren25 min
Jul 22, 2:00 PM EDTSpecial Weather StatementPHISussex45 min
Jul 22, 2:13 PM EDTSpecial Weather StatementPHIWarren32 min
Jul 22, 2:35 PM EDTSevere Thunderstorm WarningPHIMorris, Sussex, Warren40 min
Jul 22, 2:58 PM EDTSmall Craft AdvisoryPHI27 hr
Jul 22, 3:02 PM EDTAreal Flood AdvisoryPHIMorris, Sussex, Warren4 hr
Jul 22, 3:12 PM EDTSevere Thunderstorm WarningPHIMorris, Sussex48 min
Jul 22, 3:33 PM EDTAreal Flood AdvisoryPHIWarren7 hr
Jul 22, 3:43 PM EDTFlash Flood WarningPHISussex4 hr
Jul 22, 4:16 PM EDTSevere Thunderstorm WarningPHICumberland, Gloucester, Salem59 min
Jul 22, 4:24 PM EDTSevere Thunderstorm WarningPHIHunterdon, Morris, Sussex, Warren51 min
Jul 22, 4:40 PM EDTAreal Flood AdvisoryPHICamden, Cumberland, Gloucester, Salem114 min
Jul 22, 4:52 PM EDTSpecial Marine WarningPHI53 min
Jul 22, 5:01 PM EDTSevere Thunderstorm WarningPHIMorris, Sussex, Warren44 min
Jul 22, 5:04 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Gloucester41 min
Jul 22, 5:14 PM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Camden, Cumberland, Gloucester, Salem61 min
Jul 22, 5:17 PM EDTSevere Thunderstorm WarningPHIHunterdon, Morris, Somerset, Warren73 min
Jul 22, 5:34 PM EDTFlash Flood WarningPHIHunterdon, Morris, Sussex, Warren4 hr
Jul 22, 5:40 PM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Camden, Cumberland, Gloucester, Mercer and 4 more80 min
Jul 22, 5:43 PM EDTAreal Flood AdvisoryPHIAtlantic, Burlington, Camden, Hunterdon, Mercer, Middlesex and 4 more3 hr
Jul 22, 5:50 PM EDTSevere Thunderstorm WarningPHIHunterdon, Mercer, Middlesex, Monmouth, Morris, Somerset and 1 more40 min
Jul 22, 5:52 PM EDTSpecial Marine WarningPHI53 min
Jul 22, 6:09 PM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Cape May, Cumberland, Ocean51 min
Jul 22, 6:12 PM EDTSpecial Marine WarningPHI93 min
Jul 22, 6:21 PM EDTAreal Flood AdvisoryPHIAtlantic, Burlington, Cumberland, Monmouth, Ocean4 hr
Jul 22, 6:27 PM EDTSpecial Marine WarningPHI48 min
Jul 22, 6:27 PM EDTSevere Thunderstorm WarningPHIHunterdon, Middlesex, Monmouth, Morris, Somerset34 min
Jul 22, 6:35 PM EDTFlash Flood WarningPHIHunterdon, Middlesex, Morris, Somerset4 hr
Jul 22, 6:38 PM EDTSpecial Marine WarningPHI67 min
Jul 22, 6:54 PM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Cape May, Cumberland, Monmouth, Ocean51 min
Jul 22, 7:39 PM EDTSpecial Marine WarningPHI96 min
Jul 21, 9:30 PM EDTSevere Thunderstorm WarningPHIChester45 min
Jul 21, 9:58 PM EDTAreal Flood AdvisoryPHIBerks, Bucks, Lehigh, Montgomery, Northampton2 hr
Jul 21, 10:14 PM EDTSevere Thunderstorm WarningPHIBerks, Bucks, Lehigh, Montgomery, Northampton46 min
Jul 21, 10:30 PM EDTFlash Flood WarningPHIBerks, Lehigh, Northampton3 hr
Jul 21, 10:31 PM EDTFlash Flood WarningPHIBerks, Lehigh, Northampton3 hr
Jul 21, 10:35 PM EDTSevere Thunderstorm WarningPHIBerks, Lehigh40 min
Jul 21, 10:42 PM EDTSevere Thunderstorm WarningPHIBerks, Chester, Montgomery48 min
Jul 21, 10:58 PM EDTAreal Flood AdvisoryPHIBerks, Chester, Montgomery59 min
Jul 21, 11:05 PM EDTSevere Thunderstorm WarningPHIBerks, Bucks, Lehigh, Montgomery40 min
Jul 21, 11:38 PM EDTFlash Flood WarningPHIBerks, Carbon, Lehigh, Monroe, Northampton2 hr
Jul 22, 12:05 AM EDTSevere Thunderstorm WarningPHICarbon, Monroe40 min
Jul 22, 12:45 AM EDTSpecial Weather StatementPHIMonroe30 min
Jul 22, 1:11 AM EDTSpecial Weather StatementPHIMonroe34 min
Jul 22, 5:32 AM EDTAreal Flood WarningPHILehigh49 min
Jul 22, 1:28 PM EDTSpecial Weather StatementPHIMonroe32 min
Jul 22, 3:18 PM EDTSpecial Weather StatementPHIChester57 min
Jul 22, 3:27 PM EDTSevere Thunderstorm WarningPHIMonroe48 min
Jul 22, 3:39 PM EDTSpecial Weather StatementPHIBerks51 min
Jul 22, 3:47 PM EDTSevere Thunderstorm WarningPHIChester, Delaware58 min
Jul 22, 4:55 PM EDTSevere Thunderstorm WarningPHIBerks, Bucks, Lehigh, Montgomery, Northampton50 min
Jul 22, 5:05 PM EDTFlash Flood WarningPHIBerks, Lehigh, Northampton4 hr
Jul 21, 9:44 PM EDTSevere Thunderstorm WarningPHINew Castle46 min

Nearby

Areal Flood Advisories in Pennsylvania, 2019Areal Flood Advisories in New Jersey, 2019Every areal flood advisory in 2019

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.