Alert archive / Delaware / Special Weather Statements in 2018

Special Weather Statement, NWS Philadelphia/Mount Holly

May 15, 2018Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this special weather statement at May 15, 2018, 10:54 PM EDT for Sussex County, Delaware. It was in force for 66 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
May 15, 2018, 10:54 PM EDT (02:54 UTC)
Expired
May 16, 2018, 12:00 AM EDT
In force
66 min
Issued by
NWS Philadelphia/Mount Holly

County Sussex County, DE

The radar

The Dover AFB radar (KDOX), 21 km from the middle of the area, began a volume at 02:54 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

Wallops Is Stn, VA (KWAL), launched 00:00Z, 2.9 hours before the alert went out and 80 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, Wallops Is Stn, VA at 00:00Z on 2018-05-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 653 joules per kilogram.LCLLFCEL10008507005003002001001 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, Wallops Is Stn, VA at 00:00Z on 2018-05-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 136 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
653 J/kg
Mixed-layer CIN
-189 J/kg
Mixed-layer LCL
1220 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
136 m²/s²
0-3 km storm-relative helicity
148 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

464 
WWUS81 KPHI 160254
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
1054 PM EDT TUE MAY 15 2018

DEZ003-004-MDZ019-020-160400-
Inland Sussex-Delaware Beaches-Talbot-Caroline-
1054 PM EDT TUE MAY 15 2018

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT SUSSEX...SOUTHEASTERN
TALBOT AND SOUTHERN CAROLINE COUNTIES...

At 1054 PM EDT, radar indicated strong thunderstorms were located
along a line extending from 23 miles southeast of Diamond Beach to
near Sharptown. Movement was southeast at 15 mph.

Winds up to 40 mph and pea size hail are possible with these storms.

Locations impacted include...
Easton, Georgetown, Seaford, Millsboro, Laurel, Lewes, Federalsburg,
Milton, Selbyville, Bridgeville, Delmar, Trappe, Dagsboro, Preston,
Oxford, Sharptown, Millville, Ellendale, Henlopen Acres and
Smithville.

Torrential rainfall is also occurring with these storms, and may
cause localized flooding. Do not drive your vehicle through flooded
roadways.

LAT...LON 3846 7569 3869 7577 3868 7593 3857 7604
      3873 7624 3884 7522 3879 7516 3880 7509
      3867 7507 3869 7508 3869 7514 3864 7513
      3862 7508 3866 7507 3861 7506 3859 7521
      3860 7506 3845 7505
TIME...MOT...LOC 0254Z 333DEG 11KT 3869 7460 3851 7565 

$$

CMS

What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at May 15, 10:48 PM EDT, 6 minutes earlier.

Area forecast discussion, May 15, 10:48 PM EDT, 6 minutes before
Area Forecast Discussion
National Weather Service Mount Holly NJ
1048 PM EDT Tue May 15 2018

.SYNOPSIS...
The cold front responsible for today's storms is expected to
stall over our region tonight. This front will remain over our
region for the next few days before lifting north as a warm
front this weekend. A cold front approaches the region early
next week.

&&

.NEAR TERM /UNTIL 6 AM WEDNESDAY MORNING/...
Severe Thunderstorm Watch has been cancelled. Lingering line of
heavy showers and thunderstorms will continue over southern
portions of the Delmarva, and frequent lightning strikes, wind
gusts to 30 mph, and heavy rain will continue for the next
couple of hours.

The cold front is not far behind across northern NJ and
northeast PA, and will slowly move southward tonight, which
will lead to a continued drying trend across the remainder
of the region.

&&

.SHORT TERM /6 AM WEDNESDAY MORNING THROUGH 6 PM WEDNESDAY/...
The front is expected to remain nearly stationary across the
southern areas New Jersey, Delaware and eastern shore of
Maryland on Wednesday. Multiple weak short wave/vorticity
impulses will continue to move across the area within the
southwest flow aloft. This will keep moisture and lift
overriding the stationary frontal boundary, likely leading to
periods of showers through the day Wednesday. There is not much
in the way of instability across the area, except across
portions of the Delmarva and southern New Jersey where the
frontal boundary stalls out. So we only keep a slight chance of
thunderstorms across those areas through the day Wednesday.

&&

.LONG TERM /WEDNESDAY NIGHT THROUGH TUESDAY/...
Few changes made to the long term given the near term concerns.
A prolonged period of unsettled weather is on tap for the rest
of the week and into the weekend.

The cold front that moves through the region tonight will be
nearly stationary just south of the area Wednesday and Thursday.
From there, the region will find itself in between two
different area of high pressure: One over the Northeast U.S. and
the other over the western Atlantic, well east of the Southeast
U.S. Meanwhile, a weak sub-tropical low will sit over the
eastern Gulf of Mexico, and several shortwaves will spin off
this low and lift to the north along the coast. The high over
the western Atlantic will act as a blocking high, and this keeps
the low from making much eastward progression.

The first of the shortwaves will lift through the region on
Wednesday, followed by another on Thursday. The best chances for
showers and thunderstorms will be across the southern half of
the forecast area, closer to the vicinity of the stationary
front over the Mid-Atlantic.

By Friday, high pressure over the Northeast U.S. lifts to the
north, and high pressure over the western Atlantic retrogrades
back towards the Southeast U.S. This allows the stationary front
begins to slowly lift north as a warm front starting on
Thursday. Rain and scattered thunderstorms on tap during this
time, and with persistent onshore flow ahead of the front, there
will be abundant moisture that could result in heavy rain at
times.

The front will finally lift north of the area on Saturday, and
rain begins to taper off. Several mid-level shortwaves will pass
through the region through the weekend, and this keeps at least
scattered showers in the forecast through Sunday.

A cold front then moves through the region on Monday. High
pressure builds in behind that front, and conditions should dry
out early next week.

It is expected to be quite active this week. Some periods of
heavy rain are expected, especially once precipitable water
values begin to approach 2 inches later in the week. With the
periods of moderate to heavy rainfall, many smaller creeks and
streams will likely have strong rises. Depending on how fast and
if the heavy rain falls over the same areas each time, there
could be some flooding concerns. We will continue to monitor
future guidance and river forecasts to see if there will be any
widespread flooding concerns. Tides are also expected to
increase through the end of the week as well, which may
exacerbate any flooding concerns.

&&

.AVIATION /03Z WEDNESDAY THROUGH SUNDAY/...
The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG,
KILG, KMIV, KACY and surrounding areas.

Tonight...Once the front continues to sag southward through
sunset, the daytime instability will weaken and the strong
thunderstorms will end. Especially for RDG, ABE, and TTN. Those
areas may end up with a few hours of dry weather later this
evening. However, the rest of the TAF sites could have showers
continue overnight. ACY and MIV could have thunderstorms
continue into this evening.

Conditions will lower to MVFR then IFR late in the overnight
toward daybreak as CIGS lower through the night. Winds will
eventually turn northwest behind the front, then become north to
northeast overnight.

Wednesday...IFR CIGS with periods of showers likely are
expected on Wednesday. Winds are expected to remain northeast to
east through the day around 5 to 10 knots.

Outlook...

Wednesday night-Sunday...MVFR/IFR during this time with rain,
possibly heavy at times, along with scattered thunderstorms.
Patchy fog at night. Widespread and persistent rain Thursday
through Saturday morning.

&&

.MARINE...
The wind will diminish overnight as the front sags southward
into the southern New Jersey and Delaware coastal waters and
seas will diminish as well. So the current end time for the
advisory looks good.

A line of strong thunderstorms will approach the coastal waters
and Delaware Bay this evening. Very strong winds, small hail,
and locally higher seas can be expected as these storms move
over the area.

Outlook...

Wednesday night and Thursday...winds and seas should stay below
SCA criteria.

Friday through Sunday...increasing seas and winds will likely
result in SCA conditions for at least part if not most of this
period.

&&

.TIDES/COASTAL FLOODING...
A cold front moves through the region tonight. The flow then
becomes onshore out of the east and northeast. With the new moon
today, astronomical tides will be high through Friday, around
5.4 ft above MLLW at Atlantic City. All of the available
guidance indicates the potential to reach minor flooding
thresholds along the DE and NJ oceanfront as early as the
Wednesday evening high tide and perhaps through the Friday
evening high tide. If this trend continues, a Coastal Flood
Advisory may eventually be needed.

&&

.PHI WATCHES/WARNINGS/ADVISORIES...
PA...None.
NJ...Flash Flood Watch until 2 AM EDT Wednesday for NJZ016>027.
DE...Flash Flood Watch until 2 AM EDT Wednesday for DEZ001>004.
MD...Flash Flood Watch until 2 AM EDT Wednesday for MDZ008-012-015-
     019-020.
MARINE...Small Craft Advisory until 2 AM EDT Wednesday for ANZ450>455.

&&

Synopsis...Johnson
Near Term...LF/Robertson
Short Term...Robertson
Long Term...Johnson/MPS
Aviation...Johnson/Robertson/MPS
Marine...Johnson/LF/Robertson/MPS
Tides/Coastal Flooding...
Hazardous weather outlook, May 15, 10:45 PM EDT, 9 minutes before
Hazardous Weather Outlook
National Weather Service Mount Holly NJ
1045 PM EDT Tue May 15 2018

NJZ001-007>010-015-PAZ054-055-060>062-070-071-101>106-170300-
Sussex-Warren-Morris-Hunterdon-Somerset-Mercer-Carbon-Monroe-Berks-
Lehigh-Northampton-Delaware-Philadelphia-Western Chester-
Eastern Chester-Western Montgomery-Eastern Montgomery-Upper Bucks-
Lower Bucks-
1045 PM EDT Tue May 15 2018

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

.DAY ONE...Tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Numerous rounds of showers and thunderstorms will continue through
the end of the week and into next weekend. Heavy rainfall is possible
during this period, with concerns for flooding increasing during
this time. Stay tuned to the latest forecasts.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

DEZ001-002-MDZ008-012-015-019-020-NJZ016>019-021-170300-
New Castle-Kent-Cecil-Kent MD-Queen Annes-Talbot-Caroline-Salem-
Gloucester-Camden-Northwestern Burlington-Cumberland-
1045 PM EDT Tue May 15 2018

...FLASH FLOOD WATCH IN EFFECT UNTIL 2 AM EDT WEDNESDAY...

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

.DAY ONE...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.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Numerous rounds of showers and thunderstorms will continue through
the end of the week and into next weekend. Heavy rainfall is possible
during this period, with concerns for flooding increasing during
this time. Stay tuned to the latest forecasts.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

NJZ012>014-170300-
Middlesex-Western Monmouth-Eastern Monmouth-
1045 PM EDT Tue May 15 2018

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

.DAY ONE...Tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Numerous rounds of showers and storms are expected to continue
through the end of the week and into next weekend. Heavy rainfall is
possible during this period, with concerns for flooding increasing
during this time.

Tides are also expected to increase through the end of the week as
well, which may exacerbate any flooding concerns. Stay tuned to the
latest forecasts.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

DEZ003-004-NJZ020-022>027-170300-
Inland Sussex-Delaware Beaches-Ocean-Atlantic-Cape May-
Atlantic Coastal Cape May-Coastal Atlantic-Coastal Ocean-
Southeastern Burlington-
1045 PM EDT Tue May 15 2018

...FLASH FLOOD WATCH IN EFFECT UNTIL 2 AM EDT WEDNESDAY...

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

.DAY ONE...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.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Numerous rounds of showers and storms are expected to continue
through the end of the week and into next weekend. Heavy rainfall is
possible during this period, with concerns for flooding increasing
during this time.

Tides are also expected to increase through the end of the week as
well, which may exacerbate any flooding concerns. Stay tuned to the
latest forecasts.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

ANZ430-431-450>455-170300-
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-
1045 PM EDT Tue May 15 2018

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

.DAY ONE...Tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

MPS

In the hours before

Local storm report, May 15, 9:47 PM EDT, 1 hour 7 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
947 PM EDT TUE MAY 15 2018

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

0457 PM     TSTM WND DMG     WEST READING            40.33N  75.95W
05/15/2018                   BERKS              PA   SOCIAL MEDIA

            TREE DOWN ON A HOUSE. NO INJURIES REPORTED. TIME
            ESTIMATED FROM RADAR.

&&

EVENT NUMBER PHI1800799

CMS
Local storm report, May 15, 9:55 PM EDT, 59 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
955 PM EDT TUE MAY 15 2018

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

0340 PM     TSTM WND DMG     PENN FOREST TWP         40.94N  75.67W
05/15/2018                   CARBON             PA   SOCIAL MEDIA

            TREES DOWN.

0345 PM     TSTM WND GST     1 W EMERALD LAKES       41.09N  75.44W
05/15/2018  M50 MPH          MONROE             PA   MESONET

            CWOP STATION REPORTS WIND GUST OF 50 MPH

0350 PM     TSTM WND DMG     1 NE MERWINSBURG        40.97N  75.46W
05/15/2018                   MONROE             PA   BROADCAST MEDIA

            *** 1 FATAL *** TREE DOWN ON A CAR KILLING ONE PERSON
            INSIDE, NEAR THE TOWN OF EFFORT.

0354 PM     HAIL             2 NE ALBRIGHTSVILLE     41.03N  75.57W
05/15/2018  M0.88 INCH       CARBON             PA   PUBLIC

            HAIL COVERING GROUND AND 45 MPH GUSTS.

0354 PM     TSTM WND DMG     MOUNT POCONO            41.12N  75.36W
05/15/2018                   MONROE             PA   TRAINED SPOTTER

            SEVERAL ROADS CLOSED AND POWER LINES DOWN. *EVENT TIME
            CORRECTED*

0354 PM     TSTM WND DMG     1 NW POLK TWP           40.93N  75.51W
05/15/2018                   MONROE             PA   DEPT OF HIGHWAYS

            DOWNED UTILITY ON STATE HIGHWAY 534 NEAR DOTTERS CORNER
            ROAD. ALL LANES CLOSED. TIME APPROXIMATED FROM RADAR.

0356 PM     TSTM WND GST     1 NE BOSSARDSVILLE      40.94N  75.26W
05/15/2018  M73 MPH          MONROE             PA   TRAINED SPOTTER

0356 PM     TSTM WND DMG     1 NE BOSSARDSVILLE      40.94N  75.26W
05/15/2018                   MONROE             PA   TRAINED SPOTTER

            NUMEROUS TREES DOWN.

0400 PM     TSTM WND DMG     STROUDSBURG             40.98N  75.20W
05/15/2018                   MONROE             PA   TRAINED SPOTTER

            NUMEROUS TREES DOWN ON VEHICLES, HOUSES, AND ROADS.
            MANY ROAD CLOSURES AND 80,000 ESTIMATED WITHOUT POWER.
            HOLDING STUDENTS IN SCHOOLS.

0404 PM     HAIL             EFFORT                  40.94N  75.44W
05/15/2018  M0.25 INCH       MONROE             PA   TRAINED SPOTTER

            50 MPH GUSTS AND SMALL TWIGS AND BRANCHES DOWN.

0405 PM     TSTM WND DMG     TURN VILLA              41.07N  75.05W
05/15/2018                   MONROE             PA   DEPT OF HIGHWAYS

            DOWNED TREE IN WIRES ON U.S. HIGHWAY 209 NEAR CAESARS
            POCONO PALACE ROAD. ALL LANES CLOSED. TIME APPROXIMATED
            FROM RADAR.

0406 PM     TSTM WND DMG     KNOWLTON                40.93N  75.03W
05/15/2018                   WARREN             NJ   SOCIAL MEDIA

            NUMEROUS TREES DOWN.

0407 PM     TSTM WND DMG     1 SW WIND GAP           40.84N  75.30W
05/15/2018                   NORTHAMPTON        PA   SOCIAL MEDIA

            TREES DOWN ON ROUTE 33 NORTHBOUND BLOCKING THE RIGHT
            LANE.

0408 PM     TSTM WND GST     2 NNW MONROE LAKE       41.14N  75.15W
05/15/2018  E58 MPH          MONROE             PA   TRAINED SPOTTER

            SPOTTER ESTIMATES WIND GUSTS OF 58+ MPH. PEA SIZE HAIL
            WAS ALSO FALLING AT THE TIME OF THE REPORT

0408 PM     TSTM WND GST     LENHARTSVILLE           40.57N  75.89W
05/15/2018  M62 MPH          BERKS              PA   MESONET

0410 PM     TSTM WND DMG     BUSHKILL TWP            40.79N  75.34W
05/15/2018                   NORTHAMPTON        PA   FIRE DEPT/RESCUE

            MULTIPLE TREES DOWN.

0411 PM     TSTM WND DMG     SLATEFORD               40.94N  75.11W
05/15/2018                   NORTHAMPTON        PA   DEPT OF HIGHWAYS

            DOWNED TREE ON STATE HIGHWAY 611 NEAR RAILROAD AVENUE.
            ALL LANES CLOSED. TIME APPROXIMATED FROM RADAR.

0412 PM     TSTM WND DMG     FRANKFORD TWP           41.15N  74.72W
05/15/2018                   SUSSEX             NJ   METEOROLOGIST

            TREES DOWN.

0413 PM     TSTM WND GST     CHERRY HILL             40.76N  75.31W
05/15/2018  M58 MPH          NORTHAMPTON        PA   TRAINED SPOTTER

            MEASURED DURING THE GUST FRONT.

0415 PM     TSTM WND DMG     BANGOR                  40.87N  75.21W
05/15/2018                   NORTHAMPTON        PA   SOCIAL MEDIA

            SEVERAL REPORTS OF TREES AND POWERLINES DOWN ACROSS
            NORTHAMPTON COUNTY. TIME ESTIMATED FROM RADAR

0415 PM     TSTM WND DMG     FREDON                  41.04N  74.81W
05/15/2018                   SUSSEX             NJ   SOCIAL MEDIA

            UPROOTED AND SNAPPED TREES

0417 PM     TSTM WND DMG     BLAIRSTOWN              40.98N  74.98W
05/15/2018                   WARREN             NJ   DEPT OF HIGHWAYS

            NUMEROUS REPORTS OF POWER LINES DOWN. TIME APPROXIMATED
            FROM RADAR.

0418 PM     TSTM WND DMG     SCIOTA                  40.93N  75.32W
05/15/2018                   MONROE             PA   DEPT OF HIGHWAYS

            DOWNED UTILITY ON U.S. HIGHWAY 209 BETWEEN LESH ROAD
            AND STATE ROAD 0033. TIME APPROXIMATED FROM RADAR.

0420 PM     HAIL             GERMANSVILLE            40.70N  75.71W
05/15/2018  E0.88 INCH       LEHIGH             PA   SOCIAL MEDIA

            NICKEL SIZE HAIL IN HEIDELBURG TOWNSHIP

0420 PM     TSTM WND DMG     STILLWATER TWP          41.07N  74.89W
05/15/2018                   SUSSEX             NJ   TRAINED SPOTTER

            SEVERAL STRUCTURES WITH DAMAGE DUE TO DOWNED TREES.
            NUMEROUS ROADS IMPASSABLE DUE TO DEBRIS.

0420 PM     TSTM WND DMG     1 NW NEWTON             41.06N  74.76W
05/15/2018                   SUSSEX             NJ   DEPT OF HIGHWAYS

            DOWNED TREE ON STATE HIGHWAY 94 SOUTH OF WEST END
            AVENUE IN NEWTON. LANE CLOSURES IN PLACE. TIME
            APPROXIMATED FROM RADAR.

0422 PM     TSTM WND GST     LEHIGH VALLEY INTL AIRP 40.65N  75.44W
05/15/2018  M51 MPH          LEHIGH             PA   ASOS

            KABE REPORTS WIND GUST OF 51 MPH

0422 PM     TSTM WND DMG     1 NW ACKERSON           41.09N  74.68W
05/15/2018                   SUSSEX             NJ   DEPT OF HIGHWAYS

            DOWNED TREE ON STATE HIGHWAY 15 NEAR STATE HIGHWAY 94
            IN LAFAYETTE TWP. ALL LANES CLOSED AND DETOURED. TIME
            APPROXIMATED FROM RADAR.

0423 PM     TSTM WND DMG     SPRINGDALE              41.02N  74.77W
05/15/2018                   SUSSEX             NJ   DEPT OF HIGHWAYS

            DOWNED TREE ON U.S. HIGHWAY 206 NEAR SPRINGDALE ROAD IN
            ANDOVER TWP. ALL LANES CLOSED AND DETOURED. TIME
            APPROXIMATED FROM RADAR.

0425 PM     LIGHTNING        STILLWATER              41.04N  74.88W
05/15/2018                   SUSSEX             NJ   PUBLIC

            SEVERAL LIGHTNING STRIKES REPORTED TO STRUCTURES
            RESULTING IN FIRES IN SUSSEX COUNTY. REPORTS HEARD VIA
            POLICE/FIRE RADIO.

0425 PM     TSTM WND DMG     NEWTON                  41.05N  74.75W
05/15/2018                   SUSSEX             NJ   SOCIAL MEDIA

            TREES DOWN ON POWERLINES.

0425 PM     TSTM WND DMG     VERNON                  41.20N  74.48W
05/15/2018                   SUSSEX             NJ   DEPT OF HIGHWAYS

            DOWNED TREE ON STATE HIGHWAY 94 NEAR VERNON CROSSINGS
            ROAD. ALL LANES CLOSED AND DETOURED. TIME ESTIMATED FROM
            RADAR.

0427 PM     FUNNEL CLOUD     5 SSE BERNVILLE         40.37N  76.07W
05/15/2018                   BERKS              PA   TRAINED SPOTTER

            BRIEF FUNNEL CLOUD REPORTED SOUTH-SOUTHEAST OF
            BERNVILLE.

0427 PM     TSTM WND DMG     WIND GAP                40.85N  75.29W
05/15/2018                   NORTHAMPTON        PA   SOCIAL MEDIA

            DOWNED TREES REPORTED IN WIND GAP, WITH SOME DAMAGING
            CARS. TIME APPROXIMATED FROM RADAR.

0428 PM     TSTM WND DMG     STOCKHOLM               41.09N  74.52W
05/15/2018                   SUSSEX             NJ   DEPT OF HIGHWAYS

            DOWNED TREE ON STATE HIGHWAY 23 NORTH OF PATERSON
            HAMBURG TURNPIKE. LANE CLOSURES IN PLACE.

0428 PM     TSTM WND DMG     1 WSW BLAZIERS CORNER   40.72N  74.57W
05/15/2018                   SOMERSET           NJ   DEPT OF HIGHWAYS

            DOWNED TREE ON U.S. HIGHWAY 202 NEAR MOUNT AIRY ROAD IN
            BERNARDSVILLE. ALL LANES CLOSED AND DETOURED. TIME
            APPROXIMATED FROM RADAR.

0435 PM     TSTM WND DMG     GREEN POND              41.02N  74.48W
05/15/2018                   MORRIS             NJ   TRAINED SPOTTER

            TREES DOWN, SOME ONTO HOMES.

0435 PM     HAIL             WANTAGE                 41.24N  74.55W
05/15/2018  M0.50 INCH       SUSSEX             NJ   SOCIAL MEDIA

0435 PM     TSTM WND DMG     PARSIPPANY              40.86N  74.43W
05/15/2018                   MORRIS             NJ   SOCIAL MEDIA

            3 TREES UPROOTED IN THE AREA BETWEEN DENVILLE AND
            PARSIPPANY. TIME ESTIMATED FROM RADAR.

0436 PM     TSTM WND DMG     1 SSE HILLTOWN          40.91N  74.55W
05/15/2018                   MORRIS             NJ   DEPT OF HIGHWAYS

            DOWNED TREE AT THE MOUNT HOPE EXIT ON INTERSTATE 80.
            EXIT RAMP CLOSED. TIME APPROXIMATED FROM RADAR.

0437 PM     TSTM WND DMG     DUTTONVILLE             41.35N  74.69W
05/15/2018                   SUSSEX             NJ   TRAINED SPOTTER

            MANY TREES DOWN AFTER HIGH WINDS. HEAVY RAIN AND
            LIGHTNING.

0440 PM     TSTM WND DMG     NORTH CATASAUQUA        40.66N  75.48W
05/15/2018                   NORTHAMPTON        PA   SOCIAL MEDIA

            NUMEROUS TREES AND POWER LINES DOWN IN N CATASAUQUA. A
            WIND GUST OF 57 MPH WAS ALSO MEAUSURED DURING THIS TIME.
            TIME ESTIMATED FROM RADAR

0441 PM     TSTM WND DMG     LAKE PARSIPPANY         40.85N  74.43W
05/15/2018                   MORRIS             NJ   DEPT OF HIGHWAYS

            DOWNED TREE ON INTERSTATE 287 NEAR EXIT 40. LANE
            CLOSURES IN PLACE. TIME APPROXIMATED FROM RADAR.

0441 PM     TSTM WND DMG     TABOR                   40.87N  74.48W
05/15/2018                   MORRIS             NJ   DEPT OF HIGHWAYS

            DOWNED TREE ON STATE HIGHWAY 53 NEAR FRONT STREET IN
            DENVILLE TWP. ALL LANES CLOSED. TIME APPROXIMATED FROM
            RADAR.

0441 PM     TSTM WND DMG     PHILLIPSBURG            40.69N  75.18W
05/15/2018                   WARREN             NJ   SOCIAL MEDIA

            NUMEROUS TREES DOWN IN PHILLIPSBURG. TIME APPROXIMATED
            FROM RADAR.

0442 PM     TSTM WND DMG     LITTLETON               40.84N  74.46W
05/15/2018                   MORRIS             NJ   DEPT OF HIGHWAYS

            DOWNED TREE ON U.S. HIGHWAY 202 NEAR STATE HIGHWAY 10
            IN MORRIS PLAINS. ALL LANES CLOSED AND DETOURED. TIME
            APPROXIMATED FROM RADAR.

0445 PM     TSTM WND GST     LOWER MACUNGIE TWP      40.52N  75.58W
05/15/2018  M68 MPH          LEHIGH             PA   TRAINED SPOTTER

            WIND GUST OF 68 MPH MEASURED WITH HAND HELD
            ANEMOMETER...HOWEVER THE DEVICE HAD NOT BEEN CALIBRATED
            RECENTLY. TREE DAMAGE ALSO REPORTED

0445 PM     TSTM WND DMG     LAKE HIAWATHA           40.88N  74.38W
05/15/2018                   MORRIS             NJ   SOCIAL MEDIA

            LARGE TREE DOWN CRUSHING 2 CARS

0446 PM     TSTM WND GST     1 S RUSCOMB MANOR TWP   40.41N  75.83W
05/15/2018  M55 MPH          BERKS              PA   MESONET

            CWOP STATION REPORTS WIND GUST OF 55 MPH

0446 PM     TSTM WND DMG     POHATCONG TWP           40.63N  75.17W
05/15/2018                   WARREN             NJ   SOCIAL MEDIA

            NUMEROUS TREES, POWER LINES, AND UTILITY POLES DOWN
            THROUGHOUT POHATCONG TWP. SEVERAL ROAD CLOSURES IN
            PLACE.

0449 PM     TSTM WND DMG     MALAPARDIS              40.83N  74.44W
05/15/2018                   MORRIS             NJ   DEPT OF HIGHWAYS

            DOWNED TREE ON INTERSTATE 287 NEAR EXIT 39. LANE
            CLOSURES IN PLACE. TIME APPROXIMATED FROM RADAR.

0450 PM     TSTM WND DMG     KNOWLTON TWP            40.93N  75.06W
05/15/2018                   WARREN             NJ   SOCIAL MEDIA

            TREE DOWN ON I-80 EASTBOUND

0450 PM     TSTM WND DMG     NORTH CATASAUQUA        40.66N  75.47W
05/15/2018                   NORTHAMPTON        PA   TRAINED SPOTTER

            THREE-FOOT DIAMETER TREE FELL ONTO AND DAMAGED TWO
            DUMPSTERS AND A FENCE.

0451 PM     TSTM WND DMG     PINE BROOK              40.86N  74.34W
05/15/2018                   MORRIS             NJ   SOCIAL MEDIA

            NUMEROUS TREES DOWN IN PINE BROOK. SEVERAL ROADS ARE
            CLOSED. TIME APPROXIMATED FROM RADAR.

0452 PM     TSTM WND GST     S ALLENTOWN             40.59N  75.48W
05/15/2018  M59 MPH          LEHIGH             PA   TRAINED SPOTTER

            TRAINED SPOTTER REPORTS WIND GUST OF 59 MPH MEASURED
            WITH A HANDHELD ANEMOMETER. PEA SIZE HAIL WAS ALSO
            FALLING AT THE TIME

0452 PM     HAIL             1 S ALLENTOWN           40.58N  75.48W
05/15/2018  E0.75 INCH       LEHIGH             PA   SOCIAL MEDIA

            DIME SIZE HAIL IN S ALLENTOWN

0455 PM     TSTM WND DMG     WYOMISSING              40.33N  75.96W
05/15/2018                   BERKS              PA   TRAINED SPOTTER

            6 INCH DIAMTER TREE SNAPPED AT THE BASE. TIME ESTIMATED
            FROM RADAR

0457 PM     TSTM WND DMG     WEST READING            40.33N  75.95W
05/15/2018                   BERKS              PA   SOCIAL MEDIA

            TREE DOWN ON A HOUSE. NO INJURIES REPORTED. TIME
            ESTIMATED FROM RADAR.

0459 PM     TSTM WND DMG     COLLEGE HEIGHTS         40.37N  75.89W
05/15/2018                   BERKS              PA   SOCIAL MEDIA

            DOWNED TREES ON SKYLINE DRIVE NEAR MCKNIGHT GAP ROAD.
            TIME ESTIMATED FROM RADAR.

0500 PM     TSTM WND GST     LEBANON                 40.64N  74.84W
05/15/2018  M67 MPH          HUNTERDON          NJ   TRAINED SPOTTER

0500 PM     TSTM WND GST     WEST LAWN               40.33N  75.99W
05/15/2018  E60 MPH          BERKS              PA   TRAINED SPOTTER

            LARGE TREE DOWN IN PICTURE.

0502 PM     TSTM WND DMG     PENNSIDE                40.34N  75.88W
05/15/2018                   BERKS              PA   SOCIAL MEDIA

            DOWNED TREE DAMAGED A HOUSE. TIME ESTIMATED FROM RADAR.

0504 PM     TSTM WND DMG     OLEY TWP                40.37N  75.78W
05/15/2018                   BERKS              PA   SOCIAL MEDIA

            NUMEROUS TREES DOWN IN OLEY TOWNSHIP, WITH SEVERAL
            ROADS CLOSED. TIME ESTIMATED FROM RADAR.

0510 PM     TSTM WND DMG     DOUGLASSVILLE           40.26N  75.73W
05/15/2018                   BERKS              PA   TRAINED SPOTTER

            TREES AND POWERLINES DOWN.

0513 PM     TSTM WND GST     PORT READING            40.56N  74.25W
05/15/2018  M64 MPH          MIDDLESEX          NJ   TRAINED SPOTTER

0514 PM     TSTM WND DMG     1 N SNOWDENVILLE        40.20N  75.60W
05/15/2018                   CHESTER            PA   BROADCAST MEDIA

            REPORT OF TREES AND POWER LINES DOWN NEAR THE
            INTERSECTION OF SAYLORS MILL RD AND EBELHARE RD

0516 PM     TSTM WND GST     POTTSTOWN               40.25N  75.64W
05/15/2018  M81 MPH          MONTGOMERY         PA   TRAINED SPOTTER

            MEASURED BY HOME ROOFTOP WEATHER STATION. TREE DAMAGE
            AND ALSO SOME WINDOW DAMAGE TO A HOME. PROBABLE
            MICROBURST.

0517 PM     HAIL             POTTSTOWN               40.25N  75.64W
05/15/2018  M1.00 INCH       MONTGOMERY         PA   TRAINED SPOTTER

            QUARTER SIZE HAIL LASTED FOR 8 MINUTES.

0520 PM     HAIL             STOWE                   40.26N  75.68W
05/15/2018  E0.75 INCH       MONTGOMERY         PA   SOCIAL MEDIA

0525 PM     TSTM WND DMG     PHOENIXVILLE            40.14N  75.52W
05/15/2018                   CHESTER            PA   BROADCAST MEDIA

            TREE DOWN ON BRIDGE STREET. TIME ESTIMATED FROM RADAR

0530 PM     TSTM WND DMG     PLYMOUTH MEETING        40.11N  75.28W
05/15/2018                   MONTGOMERY         PA   TRAINED SPOTTER

            LARGE TREE LIMBS DOWN

0532 PM     TSTM WND DMG     GRATERFORD              40.23N  75.45W
05/15/2018                   MONTGOMERY         PA   TRAINED SPOTTER

            LARGE LIMB AND POWER LINES DOWN IN NEIGHBORHOOD. *EVENT
            TIME CORRECTED*

0548 PM     TSTM WND GST     NORTHEAST PHILADELPHIA  40.08N  75.01W
05/15/2018  M49 MPH          PHILADELPHIA       PA   ASOS

0555 PM     TSTM WND DMG     PLYMOUTH MEADOWS        40.13N  75.29W
05/15/2018                   MONTGOMERY         PA   SOCIAL MEDIA

            SEVERAL TREES DOWN ON MALVERN ROAD.

0601 PM     TSTM WND GST     NEWTOWN SQUARE E        39.99N  75.38W
05/15/2018  M50 MPH          DELAWARE           PA   MESONET

0601 PM     TSTM WND GST     LARCHMONT               39.99N  75.38W
05/15/2018  M50 MPH          DELAWARE           PA   MESONET

            CWOP STATION REPORTS WIND GUST OF 50 MPH

0617 PM     HAIL             FREEHOLD                40.26N  74.28W
05/15/2018  E1.00 INCH       MONMOUTH           NJ   TRAINED SPOTTER

            HAIL UP TO QUARTER SIZE.

0742 PM     FLOOD            1 NW CAMDEN             39.94N  75.12W
05/15/2018                   CAMDEN             NJ   SOCIAL MEDIA

            RIVER LINE SERVICE SUSPENDED NEAR WALTER RAND
            TRANSPORTATION CENTER OWING TO FLOODING.

&&

EVENT NUMBER PHI1800730 PHI1800724 PHI1800765 PHI1800722 PHI1800726
PHI1800786 PHI1800758 PHI1800759 PHI1800735 PHI1800723 PHI1800787
PHI1800769 PHI1800727 PHI1800725 PHI1800729 PHI1800733 PHI1800790
PHI1800755 PHI1800736 PHI1800728 PHI1800763 PHI1800793 PHI1800779
PHI1800734 PHI1800756 PHI1800784 PHI1800731 PHI1800780 PHI1800773
PHI1800739 PHI1800753 PHI1800771 PHI1800767 PHI1800795 PHI1800778
PHI1800782 PHI1800743 PHI1800744 PHI1800777 PHI1800774 PHI1800732
PHI1800751 PHI1800785 PHI1800788 PHI1800792 PHI1800783 PHI1800772
PHI1800776 PHI1800741 PHI1800789 PHI1800775 PHI1800737 PHI1800794
PHI1800796 PHI1800738 PHI1800740 PHI1800750 PHI1800799 PHI1800797
PHI1800742 PHI1800764 PHI1800798 PHI1800800 PHI1800746 PHI1800770
PHI1800745 PHI1800748 PHI1800749 PHI1800754 PHI1800747 PHI1800781
PHI1800757 PHI1800760 PHI1800768 PHI1800762 PHI1800766 PHI1800761
PHI1800791

CMS
Local storm report, May 15, 10:26 PM EDT, 28 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1026 PM EDT TUE MAY 15 2018

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

0628 PM     TSTM WND DMG     FORKED RIVER            39.83N  74.19W
05/15/2018                   OCEAN              NJ   SOCIAL MEDIA

            OUTFLOW FROM STORMS BLEW DEBRIS ONTO A SHED, CAUSING IT
            TO COLLAPSE. TIME ESTIMATED FROM RADAR.

&&

EVENT NUMBER PHI1800801

CMS
Local storm report, May 15, 10:34 PM EDT, 20 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1034 PM EDT TUE MAY 15 2018

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

0439 PM     TSTM WND DMG     1 SSE FULLERTON         40.62N  75.48W
05/15/2018                   LEHIGH             PA   NEWSPAPER

            DOWNED TREE AT SEVENTH STREET AND VIRGINIA AVENUE IN
            WHITEHALL TWP. TIME ESTIMATED FROM RADAR.

&&

EVENT NUMBER PHI1800802

CMS
Local storm report, May 15, 10:45 PM EDT, 9 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1045 PM EDT TUE MAY 15 2018

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

0442 PM     TSTM WND DMG     BOONTON                 40.91N  74.41W
05/15/2018                   MORRIS             NJ   SOCIAL MEDIA

            TREES DOWN THROUGHOUT BOONTON. SEVERAL ROADS CLOSED.
            TIME APPROXIMATED FROM RADAR.

&&

EVENT NUMBER PHI1800803

CMS
Special weather statement, May 15, 10:54 PM EDT, 0 minutes before
Special Weather Statement
National Weather Service Mount Holly NJ
1054 PM EDT TUE MAY 15 2018

DEZ003-004-MDZ019-020-160400-
Inland Sussex-Delaware Beaches-Talbot-Caroline-
1054 PM EDT TUE MAY 15 2018

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT SUSSEX...SOUTHEASTERN
TALBOT AND SOUTHERN CAROLINE COUNTIES...

At 1054 PM EDT, radar indicated strong thunderstorms were located
along a line extending from 23 miles southeast of Diamond Beach to
near Sharptown. Movement was southeast at 15 mph.

Winds up to 40 mph and pea size hail are possible with these storms.

Locations impacted include...
Easton, Georgetown, Seaford, Millsboro, Laurel, Lewes, Federalsburg,
Milton, Selbyville, Bridgeville, Delmar, Trappe, Dagsboro, Preston,
Oxford, Sharptown, Millville, Ellendale, Henlopen Acres and
Smithville.

Torrential rainfall is also occurring with these storms, and may
cause localized flooding. Do not drive your vehicle through flooded
roadways.

LAT...LON 3846 7569 3869 7577 3868 7593 3857 7604
      3873 7624 3884 7522 3879 7516 3880 7509
      3867 7507 3869 7508 3869 7514 3864 7513
      3862 7508 3866 7507 3861 7506 3859 7521
      3860 7506 3845 7505
TIME...MOT...LOC 0254Z 333DEG 11KT 3869 7460 3851 7565

CMS

The office that day

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

IssuedProductOfficeCountiesLasted
May 15, 8:43 PM EDTSpecial Marine WarningPHI92 min
May 16, 3:35 PM EDTFlood WatchPHIAtlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 8 more3 days
May 15, 8:43 PM EDTAreal Flood AdvisoryPHIKent, Sussex4 hr
May 15, 10:01 PM EDTAreal Flood AdvisoryPHIKent, Sussex4 hr

Nearby

Special Weather Statements in Delaware, 2018Every special weather statement in 2018

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.