Alert archive / Pennsylvania / Special Weather Statements in 2021

Special Weather Statement, NWS Philadelphia/Mount Holly

October 16, 2021Berks County, Lehigh County, Pennsylvania

NWS Philadelphia/Mount Holly issued this special weather statement at Oct 16, 2021, 2:32 PM EDT for Berks County, Lehigh County, Pennsylvania. It was in force for 58 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: Oct 16, 2021, 2:32 PM EDT (18:32 UTC)
Expired: Oct 16, 2021, 3:30 PM EDT
In force: 58 min
Issued by: NWS Philadelphia/Mount Holly
Hail: 0.00 in
Wind: 40

Counties Berks County, PA, Lehigh County, PA

The radar

The Philadelphia radar (KDIX), 133 km from the middle of the area, began a volume at 18:36 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, 6.5 hours before the alert went out and 218 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1259 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 141 m²/s²
0-3 km storm-relative helicity: 192 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

272 
WWUS81 KPHI 161832
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
232 PM EDT Sat Oct 16 2021
 
PAZ060>062-101-103-161930-
Lehigh PA-Western Montgomery PA-Western Chester PA-Northampton PA-
Berks PA-
232 PM EDT Sat Oct 16 2021

...Showers with strong winds will impact portions of Berks, Lehigh, 
northwestern Montgomery, north central Chester and west central 
Northampton Counties through 330 PM EDT...

At 231 PM EDT, Doppler radar was tracking a line of showers with 
strong winds along a line extending from Wanamakers to near 
Adamstown. Movement was east at 25 mph.

HAZARD...Wind gusts up to 45 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around 
         unsecured objects.

Locations impacted include...
Allentown, Reading, Pottstown, Emmaus, Wyomissing, Northampton,
Birdsboro, Kutztown, Hamburg, Slatington, Fleetwood, Sinking Spring,
Laureldale, Walnutport, Topton, Leesport, Shoemakersville, Elverson,
Bally and Bechtelsville.

This includes the following highways...
 Pennsylvania Turnpike between mile markers 296 and 297.
 Northeast Extension between mile markers 52 and 68.
 Interstate 78 in Pennsylvania between mile markers 32 and 57.
 Interstate 176 in Pennsylvania between mile markers 1 and 11.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

These showers may intensify with lightning possible, so be certain 
to monitor local radio stations and available television stations 
for additional information and possible warnings from the National 
Weather Service.

&&

LAT...LON 4066 7594 4071 7581 4077 7546 4017 7557
      4016 7591 4027 7608
TIME...MOT...LOC 1831Z 247DEG 20KT 4068 7582 4023 7599 

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

$$

Fitzsimmons

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 16, 10:35 AM EDT	Coastal Flood Statement	PHI	Ocean	2 hr
Oct 16, 3:22 PM EDT	Special Marine Warning	PHI		113 min
Oct 16, 3:31 PM EDT	Severe Thunderstorm Warning	PHI	Salem	18 min
Oct 16, 3:41 PM EDT	Special Weather Statement	PHI	Hunterdon, Sussex, Warren	49 min
Oct 16, 4:02 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Middlesex, Morris, Somerset	43 min
Oct 16, 4:18 PM EDT	Special Weather Statement	PHI	Atlantic, Burlington, Camden, Cumberland, Gloucester, Mercer and 1 more	57 min
Oct 16, 5:10 PM EDT	Special Marine Warning	PHI		95 min
Oct 16, 5:29 PM EDT	Special Marine Warning	PHI		91 min
Oct 16, 6:09 PM EDT	Special Marine Warning	PHI		66 min
Oct 16, 6:52 PM EDT	Coastal Flood Statement	PHI	Ocean	4 hr
Oct 16, 1:39 PM EDT	Special Weather Statement	PHI	Berks	51 min
Oct 16, 2:44 PM EDT	Special Weather Statement	PHI	Chester	61 min
Oct 16, 3:40 PM EDT	Special Weather Statement	PHI	New Castle	50 min

Nearby

Special Weather Statements in Pennsylvania, 2021 Every special weather statement in 2021

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.