Alert archive / Pennsylvania / Special Weather Statements in 2016

Special Weather Statement, NWS Philadelphia/Mount Holly

August 21, 2016Berks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this special weather statement at Aug 21, 2016, 1:26 PM EDT for Berks County, Pennsylvania. It was in force for 64 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: Aug 21, 2016, 1:26 PM EDT (17:26 UTC)
Expired: Aug 21, 2016, 2:30 PM EDT
In force: 64 min
Issued by: NWS Philadelphia/Mount Holly

County Berks County, PA

The radar

The Philadelphia radar (KDIX), 159 km from the middle of the area, began a volume at 17:29 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, 5.4 hours before the alert went out and 219 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: 310 J/kg
Mixed-layer CIN: -37 J/kg
Mixed-layer LCL: 719 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 54 m²/s²
0-3 km storm-relative helicity: 78 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

As transmitted.

058 
WWUS81 KPHI 211726
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
126 PM EDT SUN AUG 21 2016
 
PAZ054-060-061-211830-
CARBON-BERKS-LEHIGH-
126 PM EDT SUN AUG 21 2016

...A LINE OF HEAVY SHOWERS AND ISOLATED EMBEDDED THUNDERSTORMS WILL
AFFECT NORTHWESTERN LEHIGH... CENTRAL BERKS AND SOUTHWESTERN CARBON
COUNTIES...

AT 125 PM EDT...A BAND OF HEAVY SHOWERS AND ISOLATED EMBEDDED
THUNDERSTORMS WAS ALONG A LINE EXTENDING FROM NEAR SLABTOWN TO AVON
TO STEWARTSTOWN...AND MOVING NORTHEAST AT 20 MPH.

THESE STORMS WILL BE NEAR...  NEWMANSTOWN AROUND 145 PM EDT.  
WOMELSDORF AROUND 150 PM EDT.  ROBESONIA AROUND 155 PM EDT.  
STRAUSSTOWN AROUND 205 PM EDT.   BERNVILLE AROUND 210 PM EDT. 
FAIRVIEW HGTS AROUND 220 PM EDT. 
HAMBURG...LEESPORT...SHOEMAKERSVILLE AND LENHARTSVILLE AROUND 230 PM
 EDT. 

OTHER LOCATIONS IMPACTED BY THESE STORMS INCLUDE WEST LAWN...
CENTERPORT...TRESCKOW...MOHNTON...SHILLINGTON...BEAVER
MEADOWS...LANSFORD... WEST WYOMISSING...WYOMISSING HILLS AND
WHITFIELD.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THESE STORMS...AND MAY
CAUSE LOCALIZED FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

THESE STORMS 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 4052 7634 4052 7625 4058 7606 4058 7601
      4063 7600 4068 7588 4081 7587 4082 7589
      4091 7599 4096 7586 4057 7587 4021 7599
      4049 7643
TIME...MOT...LOC 1725Z 241DEG 18KT 4094 7636 4036 7638 3974 7657 
$$

DRAG

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 21, 1:36 PM EDT	Small Craft Advisory	PHI		26 hr
Aug 21, 3:47 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Camden, Cumberland, Gloucester, Salem	118 min
Aug 21, 3:57 PM EDT	Special Marine Warning	PHI		63 min
Aug 21, 5:19 PM EDT	Special Marine Warning	PHI		41 min
Aug 21, 5:43 PM EDT	Special Weather Statement	PHI	Cape May, Cumberland	47 min
Aug 21, 5:49 PM EDT	Special Marine Warning	PHI		26 min
Aug 21, 6:08 PM EDT	Special Weather Statement	PHI	Cape May	37 min
Aug 21, 6:12 PM EDT	Special Marine Warning	PHI		33 min
Aug 21, 6:48 PM EDT	Special Marine Warning	PHI		42 min
Aug 21, 6:59 PM EDT	Special Weather Statement	PHI	Cape May	16 min
Aug 21, 1:08 PM EDT	Special Weather Statement	PHI	Lebanon	22 min
Aug 21, 2:51 PM EDT	Areal Flood Advisory	PHI	Chester, Delaware, Montgomery	114 min
Aug 21, 2:38 PM EDT	Special Weather Statement	PHI	Cecil	22 min
Aug 21, 2:57 PM EDT	Special Weather Statement	PHI	Kent, Queen Anne's	33 min
Aug 21, 3:30 PM EDT	Areal Flood Advisory	PHI	Caroline, Cecil, Kent, Queen Anne's	2 hr
Aug 21, 3:40 PM EDT	Special Weather Statement	PHI	Talbot	50 min
Aug 21, 3:50 PM EDT	Special Weather Statement	PHI	Kent	25 min
Aug 21, 4:06 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Kent, Queen Anne's	39 min
Aug 21, 4:19 PM EDT	Special Weather Statement	PHI	Talbot	26 min
Aug 21, 4:20 PM EDT	Flash Flood Warning	PHI	Cecil, Kent, Queen Anne's	4 hr
Aug 21, 4:29 PM EDT	Special Weather Statement	PHI	Caroline	31 min
Aug 21, 4:50 PM EDT	Areal Flood Advisory	PHI	Caroline, Queen Anne's, Talbot	3 hr
Aug 21, 4:54 PM EDT	Special Weather Statement	PHI	Caroline	36 min
Aug 21, 5:06 PM EDT	Severe Thunderstorm Warning	PHI	Caroline	39 min
Aug 21, 5:09 PM EDT	Flash Flood Warning	PHI	Caroline, Queen Anne's, Talbot	4 hr
Aug 21, 6:35 PM EDT	Areal Flood Advisory	PHI	Caroline, Queen Anne's, Talbot	3 hr
Aug 21, 5:28 PM EDT	Special Weather Statement	PHI	Kent	17 min
Aug 21, 5:46 PM EDT	Special Weather Statement	PHI	Sussex	14 min
Aug 21, 5:54 PM EDT	Special Weather Statement	PHI	Sussex	36 min
Aug 21, 6:31 PM EDT	Special Weather Statement	PHI	Sussex	29 min
Aug 21, 7:04 PM EDT	Special Weather Statement	PHI	Sussex	26 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.