Alert archive / New Jersey / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 171, NWS Philadelphia/Mount Holly

July 22, 20206 counties in New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 22, 2020, 6:17 PM EDT for 6 counties in New Jersey. It was in force for 52 min. 3 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Jul 22, 2020, 6:17 PM EDT (22:17 UTC)
Expired
Jul 22, 2020, 7:09 PM EDT
In force
52 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Burlington County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Ocean County, NJ, Somerset County, NJ

The radar

The Philadelphia radar (KDIX), 45 km from the middle of the area, began a volume at 22:18 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.

What was reported inside it

TimeReportWhereRemark
Jul 22, 6:34 PM EDTTSTM WND DMGNorth Brunswick Twp, NJSEVERAL REPORTS OF WIRES DOWN IN NORTH BRUNSWICK TWP. TIME ESTIMATED FROM RADAR.
Jul 22, 6:39 PM EDTTSTM WND DMG1 Ese North Brunswick T, NJDOWNED WIRES ON U.S. HIGHWAY 1 NEAR MILLTOWN ROAD. ALL LANES CLOSED. TIME ESTIMATED FROM RADAR.
Jul 22, 6:47 PM EDTTSTM WND DMGMilltown, NJSEVERAL REPORTS OF POWER LINES DOWN IN THE MILLTOWN AREA. TIME ESTIMATED FROM RADAR.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 3 storm reports to this severe thunderstorm warning; the first came 17 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jul 22, 2:57 PM EDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 10.3 hours before the alert went out and 133 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 2020-07-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 15 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2020-07-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 111 square meters per square second.1939Sfc1 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
15 J/kg
Mixed-layer CIN
-173 J/kg
Mixed-layer LCL
1410 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
111 m²/s²
0-3 km storm-relative helicity
183 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

Open this sounding in Storm Lab

The text

As transmitted.

744 
WUUS51 KPHI 222217
SVRPHI
NJC005-021-023-025-029-035-222345-
/O.NEW.KPHI.SV.W.0171.200722T2217Z-200722T2345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
617 PM EDT Wed Jul 22 2020

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northern Ocean County in southern New Jersey...
  Eastern Mercer County in central New Jersey...
  Northeastern Burlington County in southern New Jersey...
  Southeastern Somerset County in northern New Jersey...
  Monmouth County in central New Jersey...
  Middlesex County in northern New Jersey...

* Until 745 PM EDT.

* At 617 PM EDT, severe thunderstorms were located along a line
  extending from near Somerset to Burlington, moving east at 20 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Damage to roofs, siding, trees, and power lines is 
           possible.

* Locations impacted include...
  Toms River, New Brunswick, Perth Amboy, Long Branch, Asbury Park,
  Sandy Hook, Somerset, Edison, Lakewood, Middletown, Old Bridge,
  Jackson, Howell, East Brunswick, South Brunswick, Sayreville, North
  Brunswick, Marlboro, Manalapan and Tinton Falls.

This includes the following highways...
 New Jersey Turnpike between exits 7 and 12.
 Interstate 195 in New Jersey between mile markers 0 and 34.
 Interstate 295 in New Jersey between mile markers 52 and 67.
 Interstate 287 in New Jersey between mile markers 0 and 4, and
between mile markers 9 and 12.
 Garden State Parkway between mile markers 86 and 130.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Protecting yourself from immediate threats to life and safety shall
take priority.  Whenever possible, as long as it does not cause
greater harm, all COVID-19 protective action guidance should be
followed.

For your protection move to an interior room on the lowest floor of a
building.

In addition to large hail and damaging winds, frequent cloud to
ground lightning is occurring with these storms. Move indoors
immediately. Remember, if you can hear thunder, you are close enough
to be struck by lightning.

&&

LAT...LON 4014 7397 4000 7402 4001 7479 4014 7475
      4015 7472 4018 7474 4055 7462 4055 7425
      4050 7426 4050 7428 4046 7426 4044 7420
      4045 7413 4041 7399 4048 7402 4047 7399
      4043 7397
TIME...MOT...LOC 2217Z 254DEG 19KT 4048 7454 4007 7485 

HAIL...<.75IN
WIND...60MPH
 
$$

CMS
3 follow-up statements
594 
WWUS51 KPHI 222247
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
647 PM EDT Wed Jul 22 2020

NJC005-021-023-025-029-035-222345-
/O.CON.KPHI.SV.W.0171.000000T0000Z-200722T2345Z/
Ocean NJ-Mercer NJ-Burlington NJ-Somerset NJ-Monmouth NJ-
Middlesex NJ-
647 PM EDT Wed Jul 22 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM EDT
FOR NORTHERN OCEAN...SOUTHEASTERN MERCER...NORTHERN BURLINGTON...
SOUTHEASTERN SOMERSET...MONMOUTH AND MIDDLESEX COUNTIES...

At 645 PM EDT, severe thunderstorms were located along a line
extending from Edison to Cranbury, moving east at 20 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Law enforcement. Reports of trees and wires down have been 
         received from Millstone, New Brunswick, and Milltown. 

IMPACT...Minor damage to vehicles is possible. Wind damage to roofs, 
         siding, trees, and power lines is possible.

Locations impacted include...
Toms River, New Brunswick, Perth Amboy, Long Branch, Asbury Park,
Sandy Hook, Somerset, Edison, Lakewood, Middletown, Old Bridge,
Jackson, Howell, East Brunswick, South Brunswick, Sayreville, North
Brunswick, Marlboro, Manalapan and Tinton Falls.

This includes the following highways...
 New Jersey Turnpike between exits 8 and 12.
 Interstate 195 in New Jersey between mile markers 2 and 34.
 Interstate 295 in New Jersey near mile marker 58.
 Interstate 287 in New Jersey between mile markers 0 and 4, and
between mile markers 9 and 11.
 Garden State Parkway between mile markers 88 and 130.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Protecting yourself from immediate threats to life and safety shall
take priority.  Whenever possible, as long as it does not cause
greater harm, all COVID-19 protective action guidance should be
followed.

For your protection move to an interior room on the lowest floor of a
building.

Frequent cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

LAT...LON 4014 7397 4000 7402 4015 7472 4055 7453
      4055 7425 4050 7426 4050 7428 4046 7426
      4044 7420 4045 7413 4041 7399 4048 7402
      4047 7399 4043 7397
TIME...MOT...LOC 2245Z 248DEG 19KT 4052 7436 4029 7451 

HAIL...1.00IN
WIND...60MPH
 
$$

CMS
519 
WWUS51 KPHI 222306
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
706 PM EDT Wed Jul 22 2020

NJC005-021-035-222315-
/O.CAN.KPHI.SV.W.0171.000000T0000Z-200722T2345Z/
Mercer NJ-Burlington NJ-Somerset NJ-
706 PM EDT Wed Jul 22 2020

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MERCER...NORTHERN
BURLINGTON AND SOUTHEASTERN SOMERSET COUNTIES IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
central, northern and southern New Jersey.

LAT...LON 4014 7397 4000 7402 4011 7454 4055 7440
      4055 7425 4050 7426 4050 7428 4046 7426
      4044 7420 4045 7413 4041 7399 4048 7402
      4047 7399 4043 7397
TIME...MOT...LOC 2305Z 259DEG 21KT 4055 7424 4022 7437 

$$

NJC023-025-029-222345-
/O.CON.KPHI.SV.W.0171.000000T0000Z-200722T2345Z/
Ocean NJ-Monmouth NJ-Middlesex NJ-
706 PM EDT Wed Jul 22 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM EDT
FOR NORTHERN OCEAN...MONMOUTH AND CENTRAL MIDDLESEX COUNTIES...

At 705 PM EDT, severe thunderstorms were located along a line
extending from Tottenville to near Manalapan, moving east at 25 mph.

HAZARD...60 mph wind gusts.

SOURCE...Law enforcement. Several reports of wind damage have been 
         received from the Edison and New Brunswick areas.

IMPACT...Damage to roofs, siding, trees, and power lines is 
         possible.

Locations impacted include...
Toms River, New Brunswick, Perth Amboy, Long Branch, Asbury Park,
Sandy Hook, Edison, Lakewood, Middletown, Old Bridge, Jackson,
Howell, East Brunswick, Sayreville, Marlboro, Manalapan, Tinton
Falls, Holmdel, Red Bank and Keansburg.

This includes the following highways...
 New Jersey Turnpike between exits 10 and 12.
 Interstate 195 in New Jersey between mile markers 12 and 34.
 Interstate 287 in New Jersey between mile markers 0 and 3.
 Garden State Parkway between mile markers 88 and 130.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Protecting yourself from immediate threats to life and safety shall
take priority.  Whenever possible, as long as it does not cause
greater harm, all COVID-19 protective action guidance should be
followed.

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4014 7397 4000 7402 4011 7454 4055 7440
      4055 7425 4050 7426 4050 7428 4046 7426
      4044 7420 4045 7413 4041 7399 4048 7402
      4047 7399 4043 7397
TIME...MOT...LOC 2305Z 259DEG 21KT 4055 7424 4022 7437 

HAIL...<.75IN
WIND...60MPH
 
$$

CMS
529 
WWUS51 KPHI 222309
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
709 PM EDT Wed Jul 22 2020

NJC023-025-029-222319-
/O.CAN.KPHI.SV.W.0171.000000T0000Z-200722T2345Z/
Ocean NJ-Monmouth NJ-Middlesex NJ-
709 PM EDT Wed Jul 22 2020

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN OCEAN...MONMOUTH AND
CENTRAL MIDDLESEX COUNTIES IS CANCELLED...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning has been cancelled.  However, gusty winds and 
heavy rain are still possible with these thunderstorms.

A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
central, northern and southern New Jersey.

LAT...LON 4014 7397 4000 7402 4011 7454 4055 7440
      4055 7425 4050 7426 4050 7428 4046 7426
      4044 7420 4045 7413 4041 7399 4048 7402
      4047 7399 4043 7397
TIME...MOT...LOC 2308Z 254DEG 19KT 4055 7422 4022 7435 

$$

CMS

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Jul 22, 5:02 PM EDT, 1 hour 15 minutes earlier.

Area forecast discussion, Jul 22, 5:02 PM EDT, 1 hour 15 minutes before
Area Forecast Discussion
National Weather Service Mount Holly NJ
502 PM EDT Wed Jul 22 2020

.SYNOPSIS...
A stationary front across the region and several waves of low
pressure will move along it through the end of the week. A
stronger cold front will pass through the region early Friday,
ushering in cooler and drier air in time for the weekend. Hot
and humid conditions look to return into next week as return
flow takes hold over the region.

&&

.NEAR TERM /UNTIL 6 AM THURSDAY MORNING/...
Early evening update...

Now that the event is unfolding, made some final tweaks to the grids
for this evening, mainly increasing PoPs to likely or higher levels
across most of the area as a pretty solid line of convection has
developed to our west. No surprise that widespread severe convection
has been ongoing over central MD and VA given strong instability and
moisture, and that activity is approaching Delmarva. Activity over
eastern PA has been exceeding expectations, however, as despite
earlier CAM predictions for its demise, it has strengthened into a
severe line. While not sure if it will make it all the way to the
coast especially as the Sun goes down, would not expect it to fall
apart in the next couple hours. A few isolated cells over northern
NJ ahead of this activity as well. So an active evening is expected
to continue with plenty of wind damage reports already received.

Previous discussion follows...

It's been an interesting day of mesoanalysis and keeping up on
satellite and radar trends as well as a mixed bag of model guidance.
By and large, the going thinking from previous discussions remains
the same. A hot and humid afternoon in the area, so if nothing else
that has gone to plan with heat index values of 100 to 105 over most
of the area. Convection now becomes the main story as storms are
approaching from the west. The challenge all along for today has
been figuring out how widespread severe convection will be, and
where the greatest threat is. Looking at the current state of
things, am inclined to believe the southern half of the area,
especially towards Delmarva, is most favorable. Robust clusters of
thunderstorms over VA, MD, and southern PA are tracking towards
Delmarva. While bulk shear is marginal, strong instability is
helping storms become strong to severe. No clear reason why this
activity would fall apart before it gets here; similar to yesterday,
some CAMs are likely over-doing the influence of Chesapeake Bay in
weakening convection. But seems more likely that strong to severe
storms will impact the Delmarva region this evening with a primary
threat of damaging winds.

Am less confident further north. MLCAPE values are considerably
lower over PA and central/northern NJ, though shear increases
slightly to the north. Mid-level dry air may be an issue up there
especially since mid-level lapse rates are also not very good, only
5.5 to 6 C/km. So updrafts may struggle to maintain themselves
further north. A severe storm that developed in the Poconos and is
now departing was associated with a remnant boundary from the MCS
over western PA this morning, but that boundary is moving away and
most of our activity from here on out should be what's coming in
from the west. Given the environmental parameters, suspect the best
chance for strong to severe storms will be south of a Reading to
Trenton line, but still some risk elsewhere as well.

Given all of this and the uncertainty that remains, the entire CWA
is now encompassed within the very large Severe Thunderstorm Watch
#394. There will no doubt be local minima within this watch, but
likely some maxima as well and seems prudent to hoist the watch for
all areas. Again, damaging winds are the main threat.

Once convection passes this evening, should be mainly dry for the
rest of the night. Additional remnant convection may approach from
well upstream towards daybreak, though it will likely be weakening
and may not hold together into our area at all. Still, can't rule
out an additional shower or rumble of thunder very late tonight out
to the west. A warm and humid night is expected with lows in the
70s, so still no relief from the heat.

&&

.SHORT TERM /6 AM THURSDAY MORNING THROUGH THURSDAY NIGHT/...
Another challenging forecast on Thursday. Synoptically, a shortwave
trough will be progressing out of the Great Lakes and towards New
England during the day as a weak surface wave of low pressure skirts
along the US/Canada border. A trailing cold front, oriented largely
from west to east, will slowly drop southward through the day as
this happens, though it will not clear the region on Thursday.

Starting where confidence is a little better: the temperatures.
Another hot and humid day is expected with little change in the air
mass and dew points still mainly in the low 70s. However, more cloud
cover is expected Thursday, and convection will likely begin
impacting the region earlier than on Wednesday. Because of this,
while highs will still reach the upper 80s and lower 90s, heat
headlines are not anticipated with heat index values of mainly 95 to
100. Still, it will not be too far away from criteria and will let
tonight's shift give it one more look.

Convection is likely again on Thursday. The approaching front and
trough, along with additional convectively enhanced shortwave energy
moving out of the Midwest and Ohio Valley, create a messy scenario
for the day's convection. While there is plenty of uncertainty, CAM
guidance agreement in the overall trends is not too bad. We will
likely see multiple lines or clusters of thunderstorms develop. One
of these areas would be over southern NY and northern PA by early to
mid afternoon associated with the cold front. That activity could
then gradually work its way south-southeast during the later
afternoon and evening. Expecting moderate to strong instability in
an environment of weak to moderate deep layer shear, not too
dissimilar from Wednesday but with better moisture through the
column. So convection will probably be fairly widespread though some
uncertainty as to how soon it will move south into our area. Will
also have to watch for additional development to the west-southwest,
associated with the convectively enhanced shortwave. Additional
lines or clusters may develop farther south in PA and towards VA and
MD, and some of that acidified could move into our region. SPC SWODY2
has upgraded northeastern portions of the area to a slight risk for
severe weather, with a marginal risk elsewhere, and am in good
agreement with this general idea as confidence is greater in those
northern areas where forcing is a little more certain. Damaging
winds will be the primary threat once again. Given high levels of
moisture and the fact that the front remains over the region through
the night, may see activity continue well into the night especially
to the south, though overall trend will be drier with time.

One thing that is definitely more of a concern on Thursday as
opposed to Wednesday is hydro. PWATs rise considerably on Thursday,
and look to be well in excess of 2" and perhaps near 2.25" for much
of the day. Storms will be moving at least slowly, but wind profiles
are supportive of training storms and combined with deep moisture
should promote efficient rainfall and potentially some backwards
propagation of storms. It has been very dry this past week to ten
days, and confidence in the location of the greatest threat for
hydro is low, so cannot justify a Flash Flood Watch on this cycle,
but this may be the primary threat for Thursday.

All this to say, another active day of weather is expected
Thursday.

&&

.LONG TERM /FRIDAY THROUGH WEDNESDAY/...
Friday...We will still be contending with scattered
showers/tstms and uncomfortable conditions Fri/Fri night.
Several short waves and a sfc cold front will be crossing the
area. Highs will be in the low 90s with moderate to high
humidity levels. Mostly chc pops for tstms are in the fcst attm.

The weekend...Mostly a dry forecast at this point with some
small break in the excessive heat Sat and then a slow build back
to more heat and humidity next week. Highs Sat will be in the
upper 80s to low 90s with moderate humidity levels. On Sunday,
temperatures will be a bit higher, mostly low 90s with higher
humidity levels for Delmarva and lower N/W. Chc for
showers/tstms will be low, mostly slight chc for most areas.

New week...Heat and humidity return early then some relief
expected towards the middle of the week. Highs will be in the
low/mid 90s again for many areas. Scattered tstms for each day
with Tue probably being the day with the greatest chc.

&&

.AVIATION /21Z WEDNESDAY THROUGH MONDAY/...
The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG, KILG,
KMIV, KACY and surrounding areas.

Through 04z/midnight... Prevailing VFR, however, scattered showers
and thunderstorms could impact most of the TAF sites from late this
afternoon through early tonight. Any storms could produce brief IFR
conditions as well as very gusty winds. Otherwise, southwest wind 5
to 10 kt. Moderate confidence in trends but low confidence in tstms.

04z to 12z... Mainly VFR. Patchy fog with MVFR or locally IFR vsbys
is possible especially towards RDG and ABE. Winds light and variable
or light southwest. Moderate confidence.

Thursday-Thursday night... Prevailing VFR as any morning fog should
lift early. Another round of scattered to widespread showers and
thunderstorms is expected Thursday, and that potential will exist
from early to mid afternoon through well into the overnight. West-
southwest winds of 5 to 10 kt with gusty winds possible in any
tstms. Moderate confidence in overall trends, low confidence in
details.

Outlook...

Generally VFR conditions much of the time. Scattered tstms with
locally poor CIGS/VSBYS on Fri and then next week on Mon.

&&

.MARINE...
Through Thursday night... With prevailing light winds and seas
continuing. sub-SCA conditions will continue on the waters. However,
thunderstorms are possible this evening and tonight and again
Thursday late afternoon, evening, and overnight. Locally much higher
winds and seas are possible in any thunderstorms.

Outlook...

Generally sub-SCA conditions expected. Scattered tstms mostly
Fri and then Mon,Tue next week. Seas mostly 2 to 4 ft on the
ocean.

Rip Currents...

There is a low risk for the development of dangerous rip currents
for today along the coasts of Delaware and New Jersey. A southerly
wind is forecast to increase to 10 to 15 MPH. Breaking waves are
expected to be 1 to 2 feet with a medium period swell from the south.

The low risk is anticipated to continue on Thursday. A southerly
wind around 10 MPH is expected. Breaking waves are forecast to be
around 2 feet with a medium period swell from the south.

&&

.TIDES/COASTAL FLOODING...
The new moon has occurred, and tide levels will begin to lower.
Water levels will continue to be elevated with the high tide
again this evening. The high tide on Thursday morning will be
noticeably lower than the high tide this evening.

Any minor flooding will be localized and not widespread enough
to warrant a Coastal Flood Advisory.

&&

.EQUIPMENT...
The NOAA Weather Radio All Hazards broadcast from Hibernia
Park, PA (WNG704) remains off the air until further notice due
to damage to the antenna during the June 3 derecho.

&&

.PHI WATCHES/WARNINGS/ADVISORIES...
PA...Heat Advisory until 8 PM EDT this evening for PAZ060>062-070-
     071-101>106.
NJ...Heat Advisory until 8 PM EDT this evening for NJZ009-010-012-
     013-015>023-027.
DE...Heat Advisory until 8 PM EDT this evening for DEZ001>003.
MD...Heat Advisory until 8 PM EDT this evening for MDZ008-012-015-
     019-020.
MARINE...None.

&&

Synopsis...Davis/O'Hara
Near Term...O'Brien
Short Term...O'Brien
Long Term...O'Hara
Aviation...O'Brien/O'Hara
Marine...O'Brien/O'Hara
Tides/Coastal Flooding...WFO PHI
Equipment...WFO PHI
Hazardous weather outlook, Jul 22, 3:17 PM EDT, 3 hours before
Hazardous Weather Outlook
National Weather Service Mount Holly NJ
317 PM EDT Wed Jul 22 2020

DEZ001>003-MDZ008-012-015-019-020-NJZ015>019-021>023-027-PAZ070-071-
102-104-106-231930-
New Castle-Kent-Inland Sussex-Cecil-Kent MD-Queen Annes-Talbot-
Caroline-Mercer-Salem-Gloucester-Camden-Northwestern Burlington-
Cumberland-Atlantic-Cape May-Southeastern Burlington-Delaware-
Philadelphia-Eastern Chester-Eastern Montgomery-Lower Bucks-
317 PM EDT Wed Jul 22 2020

...SEVERE THUNDERSTORM WATCH 394 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...
...HEAT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING...

This Hazardous Weather Outlook is for central Delaware, northern
Delaware, southern Delaware, northeast Maryland, 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.

   Severe Thunderstorm Watch.
   Heat Advisory.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Strong to severe thunderstorms are possible again on Thursday and may
produce both damaging winds and heavy rainfall.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

NJZ009-010-012-013-020-PAZ060>062-101-103-105-231930-
Hunterdon-Somerset-Middlesex-Western Monmouth-Ocean-Berks-Lehigh-
Northampton-Western Chester-Western Montgomery-Upper Bucks-
317 PM EDT Wed Jul 22 2020

...SEVERE THUNDERSTORM WATCH 394 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...
...HEAT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING...

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

   Severe Thunderstorm Watch.
   Heat Advisory.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Strong to severe thunderstorms are possible again on Thursday and may
produce both damaging winds and heavy rainfall.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

NJZ001-007-008-PAZ054-055-231930-
Sussex-Warren-Morris-Carbon-Monroe-
317 PM EDT Wed Jul 22 2020

...SEVERE THUNDERSTORM WATCH 394 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...

This Hazardous Weather Outlook is for northern New Jersey and
northeast 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.

   Severe Thunderstorm Watch.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Strong to severe thunderstorms are possible again on Thursday and may
produce both damaging winds and heavy rainfall.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

DEZ004-NJZ014-024>026-231930-
Delaware Beaches-Eastern Monmouth-Atlantic Coastal Cape May-
Coastal Atlantic-Coastal Ocean-
317 PM EDT Wed Jul 22 2020

...SEVERE THUNDERSTORM WATCH 394 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...

This Hazardous Weather Outlook is for southern Delaware, 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.

   Severe Thunderstorm Watch.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Strong to severe thunderstorms are possible again on Thursday and may
produce both damaging winds and heavy rainfall.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

ANZ430-431-450>455-231930-
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-
317 PM EDT Wed Jul 22 2020

...SEVERE THUNDERSTORM WATCH 394 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.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

There is a low probability for widespread hazardous weather.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

In the hours before

Local storm report, Jul 22, 5:59 PM EDT, 18 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
559 PM EDT WED JUL 22 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0225 PM     TSTM WND DMG     ANALOMINK               41.05N 75.22W
07/22/2020                   MONROE             PA   FIRE DEPT/RESCUE

            A DOWNED TREE BLOCKED PARADISE TRAIL BY PENN
            HILLS. TIME ESTIMATED FROM RADAR.

&&

JEO
Local storm report, Jul 22, 6:01 PM EDT, 16 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
601 PM EDT WED JUL 22 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0217 PM     TSTM WND DMG     2 WSW SCOTRUN           41.06N 75.35W
07/22/2020                   MONROE             PA   FIRE DEPT/RESCUE

            SEVERAL TREES AND WIRES WERE DOWNED ON
            CAMELBACK RD. TIME ESTIMATED FROM RADAR.

&&

JEO
Local storm report, Jul 22, 6:07 PM EDT, 10 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
607 PM EDT WED JUL 22 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0229 PM     TSTM WND DMG     2 NE ANALOMINK          41.08N 75.19W
07/22/2020                   MONROE             PA   FIRE DEPT/RESCUE

            TREE DOWN ON WIRES ON SCHOOLHOUSE RD. TIME
            ESTIMATED FROM RADAR.

&&

JEO
Local storm report, Jul 22, 6:09 PM EDT, 8 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
609 PM EDT WED JUL 22 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0224 PM     TSTM WND DMG     2 SSW HERNYVILLE        41.07N 75.26W
07/22/2020                   MONROE             PA   FIRE DEPT/RESCUE

            DOWNED TREE IN THE ROADWAY ON CHERRY LANE RD
            AT BIRCHWOOD RD. TIME ESTIMATED FROM RADAR.

&&

JEO
Local storm report, Jul 22, 6:12 PM EDT, 5 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
612 PM EDT WED JUL 22 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0230 PM     TSTM WND DMG     2 NE ANALOMINK          41.07N 75.19W
07/22/2020                   MONROE             PA   FIRE DEPT/RESCUE

            TREE DOWN ON A VEHICLE ON BRUSH DR. TIME
            ESTIMATED FROM RADAR.

&&

JEO
Local storm report, Jul 22, 6:14 PM EDT, 3 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
614 PM EDT WED JUL 22 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0539 PM     TSTM WND DMG     ELKTON                  39.61N 75.82W
07/22/2020                   CECIL              MD   DEPT OF HIGHWAYS

            MD-281 IN BOTH DIRECTIONS CLOSED NEAR MD-7
            DUE TO A DOWNED UTILITY. TIME ESTIMATED FROM
            RADAR.

&&

JEO

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 21, 10:57 PM EDTSpecial Marine WarningPHI63 min
Jul 22, 2:10 PM EDTSevere Thunderstorm WarningPHIWarren50 min
Jul 22, 3:04 PM EDTSevere Thunderstorm WarningPHISussex30 min
Jul 22, 3:18 PM EDTSpecial Weather StatementPHIMorris, Warren42 min
Jul 22, 3:50 PM EDTSevere Thunderstorm WarningPHIHunterdon, Morris, Sussex, Warren29 min
Jul 22, 4:33 PM EDTSpecial Weather StatementPHIMorris57 min
Jul 22, 4:56 PM EDTSevere Thunderstorm WarningPHIHunterdon, Morris, Somerset49 min
Jul 22, 5:16 PM EDTSevere Thunderstorm WarningPHIHunterdon, Morris, Sussex, Warren59 min
Jul 22, 5:23 PM EDTAreal Flood AdvisoryPHIWarren3 hr
Jul 22, 5:33 PM EDTSevere Thunderstorm WarningPHIGloucester57 min
Jul 22, 5:40 PM EDTSevere Thunderstorm WarningPHIBurlington, Hunterdon, Mercer, Somerset65 min
Jul 22, 5:49 PM EDTSpecial Marine WarningPHI86 min
Jul 22, 5:54 PM EDTSevere Thunderstorm WarningPHIGloucester, Salem51 min
Jul 22, 6:04 PM EDTSevere Thunderstorm WarningPHIHunterdon, Middlesex, Morris, Somerset, Sussex, Warren60 min
Jul 22, 6:12 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Gloucester, Salem48 min
Jul 22, 6:46 PM EDTSevere Thunderstorm WarningPHIAtlantic, Camden, Cape May, Cumberland, Gloucester, Salem44 min
Jul 22, 6:47 PM EDTSpecial Marine WarningPHI28 min
Jul 22, 6:52 PM EDTAreal Flood AdvisoryPHIMiddlesex, Somerset113 min
Jul 22, 6:52 PM EDTSpecial Marine WarningPHI41 min
Jul 22, 7:20 PM EDTSpecial Marine WarningPHI55 min
Jul 22, 7:23 PM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 1 more52 min
Jul 22, 7:58 PM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Camden, Ocean47 min
Jul 22, 7:59 PM EDTSpecial Marine WarningPHI61 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2020Every severe thunderstorm warning in 2020

Sources

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