Alert archive / New Jersey / Special Weather Statements in 2013

Special Weather Statement, NWS Philadelphia/Mount Holly

July 21, 20134 states

NWS Philadelphia/Mount Holly issued this special weather statement at Jul 21, 2013, 3:44 PM EDT for 4 states. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 21, 2013, 3:44 PM EDT (19:44 UTC)
Expired
Jul 21, 2013, 5:45 PM EDT
In force
2 hr
Issued by
NWS Philadelphia/Mount Holly

Counties New Castle County, DE, Cecil County, MD, Camden County, NJ, Gloucester County, NJ, Salem County, NJ, Delaware County, PA, Philadelphia County, PA

The radar

The Dover AFB radar (KDOX), 84 km from the middle of the area, began a volume at 19:44 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

Washington/Dulle, VA (KIAD), launched 12:00Z, 7.7 hours before the alert went out and 163 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, Washington/Dulle, VA at 12:00Z on 2013-07-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 97 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, Washington/Dulle, VA at 12:00Z on 2013-07-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -27 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
97 J/kg
Mixed-layer CIN
-169 J/kg
Mixed-layer LCL
1212 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
-27 m²/s²
0-3 km storm-relative helicity
13 m²/s²
Significant tornado parameter
-0.0
Supercell composite
-0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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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 Jul 21, 2:49 PM EDT, 55 minutes earlier.

Area forecast discussion, Jul 21, 2:49 PM EDT, 55 minutes before
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Hazardous weather outlook, Jul 21, 3:49 AM EDT, 11 hours 55 minutes before
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In the hours before

Local storm report, Jul 21, 11:25 AM EDT, 4 hours 19 minutes before
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Local storm report, Jul 21, 1:54 PM EDT, 1 hour 50 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
154 PM EDT SUN JUL 21 2013

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

0710 PM     HAIL             FOUNTAIN HILL           40.60N  75.40W
07/20/2013  E0.50 INCH       LEHIGH             PA   TRAINED SPOTTER

0845 PM     TSTM WND GST     BROOKHAVEN              39.87N  75.39W
07/20/2013  M65 MPH          DELAWARE           PA   TRAINED SPOTTER

            A 65 MPH THUNDERSTORM WIND GUST REPORTED IN BROOKHAVEN.

0902 PM     TSTM WND GST     PHILADELPHIA INTL AIRPO 39.87N  75.24W
07/20/2013  M66 MPH          PHILADELPHIA       PA   ASOS

0905 PM     TSTM WND GST     WOODBURY                39.84N  75.15W
07/20/2013  M52 MPH          GLOUCESTER         NJ   TRAINED SPOTTER

0905 PM     TSTM WND DMG     NATIONAL PARK           39.87N  75.19W
07/20/2013                   GLOUCESTER         NJ   911 CALL CENTER

            SEVERAL TREES DOWN

0905 PM     TSTM WND DMG     EAST GREENWICH TWP      39.79N  75.25W
07/20/2013                   GLOUCESTER         NJ   911 CALL CENTER

            TREE DOWN.

0905 PM     TSTM WND DMG     WEST DEPTFORD TWP       39.83N  75.20W
07/20/2013                   GLOUCESTER         NJ   911 CALL CENTER

            WIRES DOWN ON HESSIAN AVE

0905 PM     TSTM WND DMG     WOODBURY                39.84N  75.15W
07/20/2013                   GLOUCESTER         NJ   TRAINED SPOTTER

            TREE AND WIRES DOWN

1022 PM     TSTM WND DMG     STILL POND              39.33N  76.05W
07/20/2013                   KENT               MD   911 CALL CENTER

            TREES DOWN

&&

EVENT NUMBER PHI1300295 PHI1300296 PHI1300294 PHI1300293 PHI1300297
PHI1300299 PHI1300300 PHI1300301 PHI1300298

GAINES/GORSE/WD
Local storm report, Jul 21, 2:15 PM EDT, 1 hour 29 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
215 PM EDT SUN JUL 21 2013

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

0710 PM     HAIL             FOUNTAIN HILL           40.60N  75.40W
07/20/2013  E0.50 INCH       LEHIGH             PA   TRAINED SPOTTER

0902 PM     TSTM WND GST     PHILADELPHIA INTL AIRPO 39.87N  75.24W
07/20/2013  M66 MPH          PHILADELPHIA       PA   ASOS

0905 PM     TSTM WND GST     WOODBURY                39.84N  75.15W
07/20/2013  M52 MPH          GLOUCESTER         NJ   TRAINED SPOTTER

0905 PM     TSTM WND DMG     NATIONAL PARK           39.87N  75.19W
07/20/2013                   GLOUCESTER         NJ   911 CALL CENTER

            SEVERAL TREES DOWN

0905 PM     TSTM WND DMG     EAST GREENWICH TWP      39.79N  75.25W
07/20/2013                   GLOUCESTER         NJ   911 CALL CENTER

            TREE DOWN.

0905 PM     TSTM WND DMG     WEST DEPTFORD TWP       39.83N  75.20W
07/20/2013                   GLOUCESTER         NJ   911 CALL CENTER

            WIRES DOWN ON HESSIAN AVE

0905 PM     TSTM WND DMG     WOODBURY                39.84N  75.15W
07/20/2013                   GLOUCESTER         NJ   TRAINED SPOTTER

            TREE AND WIRES DOWN

1022 PM     TSTM WND DMG     STILL POND              39.33N  76.05W
07/20/2013                   KENT               MD   911 CALL CENTER

            TREES DOWN

&&

EVENT NUMBER PHI1300295 PHI1300294 PHI1300293 PHI1300297 PHI1300299
PHI1300300 PHI1300301 PHI1300298

GAINES/GORSE/WD
Special weather statement, Jul 21, 3:10 PM EDT, 34 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
310 PM EDT SUN JUL 21 2013

NJZ020-022-025>027-212015-
ATLANTIC NJ-COASTAL ATLANTIC NJ-COASTAL OCEAN NJ-OCEAN NJ-
SOUTHEASTERN BURLINGTON NJ-
310 PM EDT SUN JUL 21 2013

...AN AREA OF SCATTERED SHOWERS AND DEVELOPING THUNDERSTORMS WILL
AFFECT EASTERN ATLANTIC...OCEAN AND SOUTHEASTERN BURLINGTON
COUNTIES...

AT 303 PM EDT...AN AREA OF SHOWERS AND DEVELOPING
THUNDERSTORMS WAS LOCATED FROM BEACHWOOD TO NORTH BEACH HAVEN TO
SOMERS POINT...MOVING SOUTHEAST AT 5 MPH.

CLOUD TO GROUND LIGHTNING IS EXPECTED TO START OCCURRING WITH THESE
STORMS. IF ON THE BEACH, SEEK SHELTER IMMEDIATELY AT THE FIRST SIGN
OF THREATENING WEATHER. DO NOT STAY IN THE OPEN NOR SEEK SHELTER
UNDER TREES WHEN LIGHTNING THREATENS...MOVE INDOORS WHEN A
THUNDERSTORM APPROACHES. THESE STORMS WILL BE NEAR LAVALLETTE AROUND
320 PM...SEASIDE HEIGHTS AROUND 330 PM...NORTH BEACH HAVEN AROUND
340 PM...SURF CITY AROUND 350 PM...HARVEY CEDARS AROUND 400 PM AND
BARNEGAT LIGHT AROUND 410 PM.

LAT...LON 3977 7408 3967 7414 3960 7421 3956 7422
      3950 7430 3946 7430 3934 7443 3930 7453
      3930 7468 4017 7431 4017 7426 4011 7424
      4010 7415 4014 7411 4009 7407 4011 7403
Special weather statement, Jul 21, 3:17 PM EDT, 27 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
317 PM EDT SUN JUL 21 2013

DEZ003-004-212015-
DELAWARE BEACHES DE-INLAND SUSSEX DE-
317 PM EDT SUN JUL 21 2013

...A LINE OF WIDELY SCATTERED SHOWERS AND DEVELOPING ISOLATED
THUNDERSTORMS WILL AFFECT SOUTHEASTERN SUSSEX COUNTY...

AT 309 PM EDT...A LINE OF WIDELY SCATTERED SHOWERS AND ISOLATED
STRONG THUNDERSTORMS WAS LOCATED FROM REHOBOTH BEACH TO FRANKFORD TO
7 MILES SOUTHWEST OF OCEAN PINES...MOVING EAST AT 15 MPH.

CLOUD TO GROUND LIGHTNING IS EXPECTED TO START OCCURRING  WITH THE
THUNDERSTORMS. IF ON THE BEACH, PLEASE SEEK SHELTER AT THE FIRST
SIGN OF THREATENING WEATHER. DO NOT STAY IN THE OPEN NOR SEEK
SHELTER UNDER TREES WHEN LIGHTNING THREATENS...MOVE INDOORS WHEN A
THUNDERSTORM APPROACHES. THESE STORMS WILL BE AROUND REHOBOTH BEACH
AROUND 320 PM...OCEAN VIEW AROUND 330 PM AND SOUTH BETHANY AROUND
340 PM.

LAT...LON 3850 7526 3879 7515 3879 7511 3881 7510
      3881 7509 3866 7505 3865 7506 3860 7504
      3859 7505 3845 7504 3845 7505 3845 7527
Special weather statement, Jul 21, 3:44 PM EDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
344 PM EDT SUN JUL 21 2013

DEZ001-002-MDZ008-012-NJZ013-015>021-PAZ070-071-102-104-106-212145-
CAMDEN NJ-CECIL MD-CUMBERLAND NJ-DELAWARE PA-EASTERN CHESTER PA-
EASTERN MONTGOMERY PA-GLOUCESTER NJ-KENT DE-KENT MD-LOWER BUCKS PA-
MERCER NJ-NEW CASTLE DE-NORTHWESTERN BURLINGTON NJ-OCEAN NJ-
PHILADELPHIA PA-SALEM NJ-WESTERN MONMOUTH NJ-
344 PM EDT SUN JUL 21 2013

...SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS WILL AFFECT
CAMDEN...CECIL...DELAWARE...GLOUCESTER...NEW CASTLE...NORTHEASTERN
KENT...NORTHWESTERN BURLINGTON...NORTHWESTERN
CUMBERLAND...NORTHWESTERN KENT...NORTHWESTERN
OCEAN...PHILADELPHIA...SALEM...SOUTHEASTERN BUCKS...SOUTHEASTERN
CHESTER...SOUTHEASTERN MONTGOMERY...SOUTHERN MERCER AND SOUTHWESTERN
MONMOUTH COUNTIES...

AT 336 PM EDT...SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS HAVE
BEEN DEVELOPING ALONG THE INTERSTATE 95 CORRIDOR. THIS AREA
WAS MOVING EAST AT 10 MPH.

WIND GUSTS TO 30 MPH ARE POSSIBLE WITH THESE STORMS. CLOUD TO GROUND
LIGHTNING WILL OCCUR WITH THE STRONGER STORMS. DO NOT STAY IN THE OPEN
NOR SEEK SHELTER UNDER TREES WHEN LIGHTNING THREATENS...MOVE INDOORS
WHEN A THUNDERSTORM APPROACHES. VERY HEAVY RAIN WILL FALL FROM THESE
STORMS...AND WILL CAUSE WATER TO POND ON ROADS AND FILL POOR
DRAINAGE AREAS. QUARTER TO HALF INCH RAINS WITHIN AN HOUR ARE LIKELY
WITH THE STRONGER SHOWERS AND THUNDERSTORMS. THE RAIN CAN CAUSE
RAPID RISES ON SMALL STREAMS AND CREEKS.

LAT...LON 3938 7606 3944 7600 3946 7602 3952 7599
      3955 7603 3954 7607 3960 7611 3996 7566
      4029 7503 4018 7429 3938 7543 3943 7547
      3946 7555 3957 7552 3959 7555 3951 7555
      3947 7558 3935 7548 3928 7558 3935 7614

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 20, 8:33 PM EDTSpecial Weather StatementPHICamden57 min
Jul 20, 8:39 PM EDTSpecial Weather StatementPHICamden66 min
Jul 20, 8:49 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Gloucester56 min
Jul 20, 9:13 PM EDTSpecial Weather StatementPHIOcean32 min
Jul 20, 9:38 PM EDTSevere Thunderstorm WarningPHIBurlington67 min
Jul 20, 9:51 PM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Ocean54 min
Jul 20, 9:59 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden61 min
Jul 20, 10:07 PM EDTSpecial Marine WarningPHI83 min
Jul 20, 10:46 PM EDTSpecial Weather StatementPHIBurlington59 min
Jul 20, 10:52 PM EDTSpecial Weather StatementPHIAtlantic53 min
Jul 20, 11:10 PM EDTSpecial Marine WarningPHI95 min
Jul 21, 3:10 PM EDTSpecial Weather StatementPHIOcean65 min
Jul 21, 3:17 PM EDTCoastal Flood AdvisoryPHIMiddlesex, Monmouth, Ocean6 hr
Jul 21, 4:16 PM EDTSpecial Weather StatementPHIBurlington89 min
Jul 21, 4:20 PM EDTAreal Flood AdvisoryPHIBurlington3 hr
Jul 21, 4:44 PM EDTSpecial Weather StatementPHIBurlington61 min
Jul 21, 5:03 PM EDTAreal Flood AdvisoryPHIBurlington3 hr
Jul 21, 5:18 PM EDTSevere Thunderstorm WarningPHIBurlington57 min
Jul 21, 5:28 PM EDTAreal Flood AdvisoryPHIBurlington3 hr
Jul 21, 5:52 PM EDTSpecial Weather StatementPHIOcean53 min
Jul 21, 6:20 PM EDTSpecial Weather StatementPHIAtlantic55 min
Jul 21, 6:33 PM EDTAreal Flood AdvisoryPHIBurlington, Ocean3 hr
Jul 21, 7:02 PM EDTSpecial Weather StatementPHIAtlantic88 min
Jul 21, 7:04 PM EDTSpecial Marine WarningPHI56 min
Jul 21, 7:25 PM EDTAreal Flood AdvisoryPHIAtlantic, Burlington3 hr
Jul 20, 8:56 PM EDTSpecial Weather StatementPHINew Castle64 min
Jul 20, 10:17 PM EDTSevere Thunderstorm WarningPHIKent, New Castle58 min
Jul 20, 10:55 PM EDTAreal Flood AdvisoryPHINew Castle3 hr
Jul 21, 3:17 PM EDTSpecial Weather StatementPHISussex58 min
Jul 21, 4:25 PM EDTSpecial Weather StatementPHISussex95 min
Jul 21, 4:50 PM EDTFlash Flood WarningPHISussex4 hr
Jul 21, 4:58 PM EDTAreal Flood AdvisoryPHIKent3 hr
Jul 21, 5:45 PM EDTSpecial Weather StatementPHISussex60 min
Jul 21, 6:28 PM EDTAreal Flood AdvisoryPHIKent, Sussex3 hr
Jul 20, 9:44 PM EDTSpecial Weather StatementPHIKent61 min
Jul 20, 11:25 PM EDTSpecial Weather StatementPHIKent65 min
Jul 21, 4:35 PM EDTSpecial Weather StatementPHIKent, Queen Anne's85 min
Jul 21, 4:36 PM EDTSpecial Weather StatementPHIKent, Queen Anne's84 min

Nearby

Special Weather Statements in New Jersey, 2013Special Weather Statements in Pennsylvania, 2013Special Weather Statements in Delaware, 2013Every special weather statement in 2013

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.