Alert archive / Pennsylvania / Special Weather Statements in 2021

Special Weather Statement, NWS Philadelphia/Mount Holly

March 28, 2021Berks County, Lehigh County, Pennsylvania

NWS Philadelphia/Mount Holly issued this special weather statement at Mar 28, 2021, 5:45 PM EDT for Berks County, Lehigh County, Pennsylvania. It was in force for 30 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: Mar 28, 2021, 5:45 PM EDT (21:45 UTC)
Expired: Mar 28, 2021, 6:15 PM EDT
In force: 30 min
Issued by: NWS Philadelphia/Mount Holly

Counties Berks County, PA, Lehigh County, PA

The radar

The Philadelphia radar (KDIX), 125 km from the middle of the area, began a volume at 21:46 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, 9.8 hours before the alert went out and 213 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: 500 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 232 m²/s²
0-3 km storm-relative helicity: 255 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

344 
WWUS81 KPHI 282145
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
545 PM EDT Sun Mar 28 2021

PAZ060>062-103-282215-
Lehigh-Western Montgomery-Northampton-Berks-
545 PM EDT Sun Mar 28 2021

...A LINE OF SHOWERS WITH STRONG WINDS WILL AFFECT EASTERN 
BERKS...LEHIGH... NORTHWESTERN MONTGOMERY AND SOUTHWESTERN 
NORTHAMPTON COUNTIES...

At 544 PM EDT, radar indicated a line of showers were located along 
a line extending from near New Tripoli to Sinking Spring. Movement 
was east at 50 mph.

Wind gusts up to 45 mph are possible with these showers.

Locations impacted include...
Allentown, Reading, Bethlehem, Pottstown, Emmaus, Wyomissing,
Northampton, Birdsboro, Kutztown, Fleetwood, Sinking Spring,
Laureldale, East Greenville, Wernersville, Topton, Leesport, Bally,
Bechtelsville, Steuben and Lyons.

This includes the following highways...
 Northeast Extension between mile markers 47 and 63.
 Interstate 78 in Pennsylvania between mile markers 37 and 66.
 Interstate 176 in Pennsylvania between mile markers 8 and 11.

If outdoors, consider seeking shelter inside a building.

LAT...LON 4065 7584 4071 7528 4023 7561 4024 7565
      4024 7570 4023 7572 4028 7609 4029 7611
TIME...MOT...LOC 2144Z 265DEG 43KT 4065 7577 4030 7602 

$$

Staarmann

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 28, 2:39 AM EDT	Gale Warning	PHI		35 hr
Mar 28, 6:21 PM EDT	Special Marine Warning	PHI		54 min
Mar 28, 6:43 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Middlesex, Morris, Somerset, Warren	47 min
Mar 28, 6:47 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester, Mercer, Monmouth, Salem	43 min
Mar 28, 7:17 PM EDT	Severe Thunderstorm Warning	PHI	Mercer, Middlesex, Monmouth, Ocean, Somerset	60 min
Mar 28, 7:20 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Gloucester, Monmouth, Ocean	70 min
Mar 28, 7:38 PM EDT	Special Marine Warning	PHI		111 min
Mar 28, 5:04 PM EDT	Special Weather Statement	PHI	Berks	41 min
Mar 28, 5:13 PM EDT	Special Weather Statement	PHI	Carbon	32 min
Mar 28, 6:02 PM EDT	Special Weather Statement	PHI	Chester	28 min
Mar 28, 6:12 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery	48 min
Mar 28, 6:15 PM EDT	Special Weather Statement	PHI	Montgomery	30 min
Mar 28, 7:54 PM EDT	Special Weather Statement	PHI	Sussex	36 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.