Alert archive / Pennsylvania / Special Weather Statements in 2016

Special Weather Statement, NWS Philadelphia/Mount Holly

July 16, 2016Chester County, Pennsylvania

NWS Philadelphia/Mount Holly issued this special weather statement at Jul 16, 2016, 2:53 PM EDT for Chester County, Pennsylvania. It was in force for 37 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: Jul 16, 2016, 2:53 PM EDT (18:53 UTC)
Expired: Jul 16, 2016, 3:30 PM EDT
In force: 37 min
Issued by: NWS Philadelphia/Mount Holly

County Chester County, PA

The radar

The Dover AFB radar (KDOX), 124 km from the middle of the area, began a volume at 18:53 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, 6.9 hours before the alert went out and 158 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: 37 J/kg
Mixed-layer CIN: -158 J/kg
Mixed-layer LCL: 1668 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 3 m²/s²
0-3 km storm-relative helicity: 51 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

209 
WWUS81 KPHI 161853
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
253 PM EDT SAT JUL 16 2016
 
DEZ001-MDZ008-PAZ101-102-161930-
NEW CASTLE-CECIL-WESTERN CHESTER-EASTERN CHESTER-
253 PM EDT SAT JUL 16 2016

...A STRONG THUNDERSTORM WILL AFFECT NORTHERN NEW CASTLE...
NORTHWESTERN CECIL AND SOUTHWESTERN CHESTER COUNTIES...

AT 253 PM EDT...A STRONG THUNDERSTORM WAS OVER HOMEVILLE...OR 16
MILES SOUTHEAST OF WILLOW STREET...MOVING EAST AT 15 MPH.

WIND GUSTS UP TO 30 MPH AND HALF INCH HAIL ARE POSSIBLE WITH THIS
STORM.

LOCATIONS IMPACTED INCLUDE...
COATESVILLE...KENNETT SQUARE...OXFORD...PARKESBURG...WEST GROVE...
HOMEVILLE...MOUNT VERNON...GLEN ROY...COCHRANVILLE...HOCKESSIN...
LADENBERG...NORTH STAR...ATGLEN...SOUTH COATESVILLE...AVONDALE...
CHRISTIANA...MODENA...TOUGHKENAMON AND THORNDALE.

THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

LAT...LON 3976 7608 3976 7606 3981 7603 3983 7604
      3983 7602 3985 7602 3987 7599 3992 7600
      3994 7598 3995 7600 3998 7598 4008 7578
      3978 7569 3972 7608
TIME...MOT...LOC 1853Z 253DEG 15KT 3985 7602 
$$

SFJ

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 16, 1:37 PM EDT	Special Weather Statement	PHI	Burlington	23 min
Jul 16, 1:57 PM EDT	Special Weather Statement	PHI	Burlington	33 min
Jul 16, 1:59 PM EDT	Special Weather Statement	PHI	Monmouth	31 min
Jul 16, 2:03 PM EDT	Special Marine Warning	PHI		57 min
Jul 16, 2:10 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Ocean	50 min
Jul 16, 2:13 PM EDT	Special Weather Statement	PHI	Mercer	32 min
Jul 16, 2:35 PM EDT	Areal Flood Advisory	PHI	Burlington, Monmouth, Ocean	7 hr
Jul 16, 2:43 PM EDT	Special Marine Warning	PHI		92 min
Jul 16, 2:43 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Monmouth, Ocean	47 min
Jul 16, 2:45 PM EDT	Special Weather Statement	PHI	Mercer, Middlesex	30 min
Jul 16, 2:59 PM EDT	Special Weather Statement	PHI	Mercer	46 min
Jul 16, 3:03 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth, Ocean	42 min
Jul 16, 3:17 PM EDT	Special Weather Statement	PHI	Middlesex	28 min
Jul 16, 3:34 PM EDT	Special Weather Statement	PHI	Burlington	26 min
Jul 16, 3:53 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Ocean	52 min
Jul 16, 4:00 PM EDT	Special Weather Statement	PHI	Mercer	30 min
Jul 16, 4:30 PM EDT	Special Weather Statement	PHI	Camden	30 min
Jul 16, 4:38 PM EDT	Special Weather Statement	PHI	Ocean	37 min
Jul 16, 4:48 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden	42 min
Jul 16, 4:57 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Ocean	26 min
Jul 16, 5:29 PM EDT	Special Weather Statement	PHI	Camden	31 min
Jul 16, 5:47 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Gloucester, Ocean	43 min
Jul 16, 6:01 PM EDT	Special Weather Statement	PHI	Monmouth, Ocean	44 min
Jul 16, 6:06 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Camden, Gloucester	4 hr
Jul 16, 6:29 PM EDT	Special Weather Statement	PHI	Camden	31 min
Jul 16, 6:48 PM EDT	Special Weather Statement	PHI	Warren	27 min
Jul 16, 6:55 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Gloucester	50 min
Jul 16, 7:12 PM EDT	Special Weather Statement	PHI	Warren	33 min
Jul 16, 7:37 PM EDT	Special Weather Statement	PHI	Camden	23 min
Jul 16, 7:39 PM EDT	Special Weather Statement	PHI	Warren	36 min
Jul 16, 2:20 PM EDT	Special Weather Statement	PHI	Bucks, Montgomery	25 min
Jul 16, 3:12 PM EDT	Special Weather Statement	PHI	Delaware	33 min
Jul 16, 3:33 PM EDT	Areal Flood Advisory	PHI	Chester, Delaware	3 hr
Jul 16, 7:45 PM EDT	Special Weather Statement	PHI	Monroe	30 min
Jul 16, 6:33 PM EDT	Special Weather Statement	PHI	Kent	27 min
Jul 16, 6:42 PM EDT	Special Weather Statement	PHI	Kent, Queen Anne's	33 min
Jul 16, 7:04 PM EDT	Special Weather Statement	PHI	Caroline, Talbot	26 min
Jul 16, 7:17 PM EDT	Special Weather Statement	PHI	Kent, Queen Anne's	28 min
Jul 16, 7:32 PM EDT	Special Weather Statement	PHI	Caroline, Talbot	28 min

Nearby

Special Weather Statements in Pennsylvania, 2016 Every special weather statement in 2016

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.