Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 62, NWS Philadelphia/Mount Holly

May 27, 2022Berks County, Chester County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 27, 2022, 2:23 PM EDT for Berks County, Chester County, Pennsylvania. It was in force for 21 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: May 27, 2022, 2:23 PM EDT (18:23 UTC)
Expired: May 27, 2022, 2:44 PM EDT
In force: 21 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Berks County, PA, Chester County, PA

The radar

The Philadelphia radar (KDIX), 119 km from the middle of the area, began a volume at 18:26 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 27, 12:57 PM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 6.4 hours before the alert went out and 187 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: 221 J/kg
Mixed-layer CIN: -19 J/kg
Mixed-layer LCL: 481 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 94 m²/s²
0-3 km storm-relative helicity: 182 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

As transmitted.

322 
WUUS51 KPHI 271823
SVRPHI
PAC011-029-271915-
/O.NEW.KPHI.SV.W.0062.220527T1823Z-220527T1915Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
223 PM EDT Fri May 27 2022

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Southeastern Berks County in eastern Pennsylvania...
  Northwestern Chester County in southeastern Pennsylvania...

* Until 315 PM EDT.

* At 223 PM EDT, a severe thunderstorm was located over Gap, or 11
  miles south of New Holland, moving northeast at 40 mph.

  HAZARD...60 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to roofs, siding, trees, and power lines is 
           possible.

* Locations impacted include...
  Phoenixville, Coatesville, Downingtown, Birdsboro, Royersford,
  Parkesburg, Honey Brook, Elverson, New Morgan, Homeville,
  Cochranville, Pughtown, Lionville-Marchwood, Glenmoore, Chester
  Springs, Lionville, Cedarville, Stowe, Spring City and Atglen.

This includes the following highways...
 Pennsylvania Turnpike between mile markers 297 and 315.
 Interstate 176 in Pennsylvania near mile marker 1.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

To report severe weather, contact your nearest law enforcement
agency. They will send your report to the National Weather Service
office in Mount Holly NJ.

&&

LAT...LON 3987 7599 3997 7599 4004 7593 4011 7594
      4014 7588 4017 7591 4031 7575 4027 7568
      4024 7569 4024 7565 4020 7555 4015 7552
      4016 7550 4013 7550 3982 7598 3985 7602
TIME...MOT...LOC 1823Z 223DEG 34KT 3995 7601 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

MPS

1 follow-up statement

363 
WWUS51 KPHI 271844
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
244 PM EDT Fri May 27 2022

PAC011-029-271854-
/O.CAN.KPHI.SV.W.0062.000000T0000Z-220527T1915Z/
Berks PA-Chester PA-
244 PM EDT Fri May 27 2022

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN BERKS AND
NORTHWESTERN 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.

A Severe Thunderstorm Watch remains in effect until 700 PM EDT for
eastern and southeastern Pennsylvania.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Mount Holly NJ.

LAT...LON 3987 7599 3997 7599 4004 7593 4011 7594
      4014 7588 4017 7591 4031 7575 4027 7568
      4024 7569 4024 7565 4020 7555 4015 7552
      4016 7550 4013 7550 3982 7598 3985 7602
TIME...MOT...LOC 1843Z 223DEG 34KT 4010 7583 

$$

MPS

The office that day

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

Issued	Product	Office	Counties	Lasted
May 27, 3:23 AM EDT	Flood Watch	PHI	Berks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more	21 hr
May 27, 2:43 PM EDT	Special Weather Statement	PHI	Delaware	47 min
May 27, 2:46 PM EDT	Special Weather Statement	PHI	Lehigh	29 min
May 27, 2:52 PM EDT	Special Weather Statement	PHI	Delaware	23 min
May 27, 3:08 PM EDT	Special Weather Statement	PHI	Lehigh	37 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2022 Every severe thunderstorm warning in 2022

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.