Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 44, NWS Philadelphia/Mount Holly

June 14, 20154 states

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 14, 2015, 4:11 PM EDT for 4 states. It was in force for 38 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: Jun 14, 2015, 4:11 PM EDT (20:11 UTC)
Expired: Jun 14, 2015, 4:49 PM EDT
In force: 38 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties New Castle County, DE, Cecil County, MD, Salem County, NJ, Chester County, PA

The radar

The Dover AFB radar (KDOX), 95 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

Washington/Dulle, VA (KIAD), launched 12:00Z, 8.2 hours before the alert went out and 166 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 24 J/kg
Mixed-layer CIN: -177 J/kg
Mixed-layer LCL: 1394 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: -35 m²/s²
0-3 km storm-relative helicity: -19 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

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

878 
WUUS51 KPHI 142011
SVRPHI
DEC003-MDC015-NJC033-PAC029-142115-
/O.NEW.KPHI.SV.W.0044.150614T2011Z-150614T2115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
411 PM EDT SUN JUN 14 2015

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ  HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN NEW CASTLE COUNTY IN NORTHERN DELAWARE...
  EAST CENTRAL CECIL COUNTY IN NORTHEASTERN MARYLAND...
  NORTHWESTERN SALEM COUNTY IN SOUTHERN NEW JERSEY...
  SOUTH CENTRAL CHESTER COUNTY IN SOUTHEASTERN PENNSYLVANIA...

* UNTIL 515 PM EDT

* AT 411 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS
  OF 60 MPH. THIS STORM WAS LOCATED OVER BLAKE...OR 7 MILES NORTHWEST
  OF NEWARK...AND MOVING SOUTHEAST AT 10 MPH.

* LOCATIONS IMPACTED INCLUDE...
  NEWARK...ELKTON...CALVERT...PENNSVILLE...NEW CASTLE...OXFORD...
  NORTH EAST...WEST GROVE...CAYOTS...BEAR...BLAKE...PLEASANT HILL...
  ANDORA...LADENBERG...APPLETON...GLASGOW...CHERRY HILL...BAY VIEW...
  LOMBARD AND KEMBLESVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...LARGE HAIL...DEADLY
LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION...MOVE TO AN
INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY
RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER
COVERS THE ROAD.

&&

LAT...LON 3975 7603 3984 7585 3966 7556 3964 7553
      3962 7557 3964 7555 3966 7558 3962 7561
      3959 7561 3946 7585
TIME...MOT...LOC 2011Z 323DEG 10KT 3973 7589 

$$

SFJ

3 follow-up statements

128 
WWUS51 KPHI 142016
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
416 PM EDT SUN JUN 14 2015

NJC033-142025-
/O.CAN.KPHI.SV.W.0044.000000T0000Z-150614T2115Z/
SALEM NJ-
416 PM EDT SUN JUN 14 2015

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN SALEM COUNTY IS
CANCELLED...
    
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING IS NOT EXPECTED 
TO MOVE INTO SALEM COUNTY. THEREFORE THE WARNING HAS BEEN CANCELLED.

LAT...LON 3975 7603 3984 7585 3966 7556 3966 7558
      3962 7561 3959 7561 3946 7585
TIME...MOT...LOC 2015Z 323DEG 10KT 3972 7588 

$$

DEC003-MDC015-PAC029-142115-
/O.CON.KPHI.SV.W.0044.000000T0000Z-150614T2115Z/
NEW CASTLE DE-CECIL MD-CHESTER PA-
416 PM EDT SUN JUN 14 2015

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR NORTHWESTERN NEW CASTLE...EAST CENTRAL CECIL AND SOUTH CENTRAL
CHESTER COUNTIES...

AT 415 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE
OF PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60
MPH. THIS STORM WAS LOCATED OVER FAIR HILL...OR 7 MILES NORTHWEST OF
NEWARK...MOVING SOUTHEAST AT 10 MPH.

LOCATIONS IMPACTED INCLUDE...
NEWARK...ELKTON...CALVERT...NEW CASTLE...OXFORD...NORTH EAST...WEST
GROVE...CAYOTS...BEAR...BLAKE...PLEASANT HILL...ANDORA...LADENBERG...
APPLETON...GLASGOW...CHERRY HILL...BAY VIEW...LOMBARD...KEMBLESVILLE
AND PIKE CREEK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...DESTRUCTIVE HAIL...
DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN
INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY
RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER
COVERS THE ROAD.

&&

LAT...LON 3975 7603 3984 7585 3966 7556 3966 7558
      3962 7561 3959 7561 3946 7585
TIME...MOT...LOC 2015Z 323DEG 10KT 3972 7588 

$$

SFJ

951 
WWUS51 KPHI 142035
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
435 PM EDT SUN JUN 14 2015

DEC003-MDC015-PAC029-142115-
/O.CON.KPHI.SV.W.0044.000000T0000Z-150614T2115Z/
NEW CASTLE DE-CECIL MD-CHESTER PA-
435 PM EDT SUN JUN 14 2015

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR WEST CENTRAL NEW CASTLE...EAST CENTRAL CECIL AND SOUTH CENTRAL
CHESTER COUNTIES...

AT 435 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE
OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS
LOCATED OVER ANDORA...OR NEAR NEWARK...MOVING SOUTHEAST AT 10 MPH.

LOCATIONS IMPACTED INCLUDE...
NEWARK...ELKTON...CALVERT...OXFORD...NORTH EAST...CAYOTS...BEAR...
BLAKE...PLEASANT HILL...ANDORA...KEMBLESVILLE...BARKSDALE...FAIR
HILL...GLEN WESTOVER...BRANTWOOD...APPLETON...GLASGOW...CHERRY
HILL...BAY VIEW AND LOMBARD.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...DESTRUCTIVE HAIL...
DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN
INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY
RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER
COVERS THE ROAD.

&&

LAT...LON 3975 7603 3982 7589 3965 7559 3962 7561
      3959 7561 3946 7585
TIME...MOT...LOC 2035Z 333DEG 8KT 3968 7587 

$$

SFJ

163 
WWUS51 KPHI 142049
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
449 PM EDT SUN JUN 14 2015

DEC003-MDC015-PAC029-142058-
/O.CAN.KPHI.SV.W.0044.000000T0000Z-150614T2115Z/
NEW CASTLE DE-CECIL MD-CHESTER PA-
449 PM EDT SUN JUN 14 2015

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL NEW CASTLE...EAST
CENTRAL CECIL AND SOUTH CENTRAL CHESTER COUNTIES IS CANCELLED...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE THE WARNING HAS BEEN CANCELLED. HOWEVER HEAVY RAIN IS STILL
POSSIBLE WITH THIS THUNDERSTORM.

LAT...LON 3975 7603 3982 7589 3965 7559 3962 7561
      3959 7561 3946 7585
TIME...MOT...LOC 2046Z 323DEG 10KT 3965 7584 

$$

SFJ

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 14, 4:40 PM EDT	Areal Flood Advisory	PHI	Chester	3 hr
Jun 14, 6:24 PM EDT	Special Weather Statement	PHI	Berks, Chester	51 min
Jun 14, 6:35 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester	55 min
Jun 14, 6:45 PM EDT	Areal Flood Advisory	PHI	Carbon, Monroe	4 hr
Jun 14, 7:16 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Montgomery	44 min
Jun 14, 4:54 AM EDT	Areal Flood Advisory	PHI	Caroline, Cecil, Kent, Queen Anne's	4 hr
Jun 14, 4:06 PM EDT	Special Weather Statement	PHI	Cecil	24 min
Jun 14, 6:32 PM EDT	Special Weather Statement	PHI	Cecil, Kent, Queen Anne's, Talbot	28 min
Jun 14, 7:21 PM EDT	Special Weather Statement	PHI	Caroline, Cecil, Kent, Queen Anne's	39 min
Jun 14, 4:00 PM EDT	Special Weather Statement	PHI	Atlantic	30 min
Jun 14, 4:30 PM EDT	Special Weather Statement	PHI	Atlantic, Camden	30 min
Jun 14, 7:55 PM EDT	Special Marine Warning	PHI		50 min
Jun 14, 3:21 PM EDT	Special Weather Statement	PHI	Sussex	24 min
Jun 14, 3:26 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	36 min
Jun 14, 4:32 PM EDT	Special Weather Statement	PHI	Sussex	28 min
Jun 14, 5:06 PM EDT	Special Weather Statement	PHI	Sussex	24 min
Jun 14, 5:15 PM EDT	Areal Flood Advisory	PHI	Kent, Sussex	5 hr
Jun 14, 5:29 PM EDT	Special Weather Statement	PHI	Sussex	31 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2015 Severe Thunderstorm Warnings in Maryland, 2015 Severe Thunderstorm Warnings in New Jersey, 2015 Every severe thunderstorm warning in 2015

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.