Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 32, NWS Philadelphia/Mount Holly

May 16, 2022Berks County, Chester County, Montgomery County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 16, 2022, 5:17 PM EDT for Berks County, Chester County, Montgomery County, Pennsylvania. It was in force for 43 min. 4 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 16, 2022, 5:17 PM EDT (21:17 UTC)
Expired: May 16, 2022, 6:00 PM EDT
In force: 43 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Berks County, PA, Chester County, PA, Montgomery County, PA

The radar

The Philadelphia radar (KDIX), 123 km from the middle of the area, began a volume at 21:20 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.

What was reported inside it

Time	Report	Where	Remark
May 16, 5:22 PM EDT	HAIL 0.25	Pottstown Landing, PA
May 16, 5:35 PM EDT	HAIL 1	Pottstown, PA	HAIL UP TO QUARTER SIZE.
May 16, 5:37 PM EDT	HAIL 0.5	2 Wnw South Coventry Tw, PA	REPORT FROM MPING: HALF-INCH (0.50 IN.).
May 16, 5:40 PM EDT	HAIL 0.5	Pottstown Landing, PA

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

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 16, 1:33 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 9.3 hours before the alert went out and 198 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: 243 J/kg
Mixed-layer CIN: -108 J/kg
Mixed-layer LCL: 780 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 86 m²/s²
0-3 km storm-relative helicity: 98 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

930 
WUUS51 KPHI 162117
SVRPHI
PAC011-029-091-162200-
/O.NEW.KPHI.SV.W.0032.220516T2117Z-220516T2200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
517 PM EDT Mon May 16 2022

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Southeastern Berks County in eastern Pennsylvania...
  Central Montgomery County in southeastern Pennsylvania...
  Northeastern Chester County in southeastern Pennsylvania...

* Until 600 PM EDT.

* At 517 PM EDT, a severe thunderstorm was located near New Morgan,
  or 8 miles south of Reading, moving east at 50 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Minor damage to vehicles is possible. Wind damage to 
           roofs, siding, trees, and power lines is possible.

* Locations impacted include...
  Reading, Pottstown, Phoenixville, Lansdale, East Norriton,
  Wyomissing, Souderton, Birdsboro, Collegeville, Royersford, Sinking
  Spring, Trappe, Hatfield, East Greenville, Honey Brook,
  Schwenksville, Elverson, Bally, Bechtelsville and Green Lane.

This includes the following highways...
 Pennsylvania Turnpike between mile markers 296 and 305.
 Northeast Extension between mile markers 25 and 38.
 Interstate 176 in Pennsylvania between mile markers 1 and 11.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

In addition to large hail and damaging winds, frequent cloud to
ground lightning is occurring with this storm. Move indoors
immediately. Remember, if you can hear thunder, you are close enough
to be struck by lightning.

&&

LAT...LON 4037 7603 4041 7547 4020 7512 4009 7594
      4011 7594 4014 7588 4025 7605
TIME...MOT...LOC 2117Z 257DEG 41KT 4022 7593 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Gorse

3 follow-up statements

982 
WWUS51 KPHI 162133
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
533 PM EDT Mon May 16 2022

PAC011-029-091-162200-
/O.CON.KPHI.SV.W.0032.000000T0000Z-220516T2200Z/
Berks PA-Montgomery PA-Chester PA-
533 PM EDT Mon May 16 2022

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR SOUTHEASTERN BERKS...NORTHERN MONTGOMERY AND NORTH CENTRAL
CHESTER COUNTIES...

At 533 PM EDT, a severe thunderstorm was located over Cedarville, or
13 miles southeast of Reading, moving east at 45 mph.

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

SOURCE...Radar indicated.

IMPACT...Minor damage to vehicles is possible. Wind damage to roofs, 
         siding, trees, and power lines is possible.

Locations impacted include...
Pottstown, Lansdale, Souderton, Birdsboro, Collegeville, Royersford,
Trappe, Hatfield, East Greenville, Schwenksville, Elverson, Bally,
Bechtelsville, Green Lane, Pughtown, Spring Mount, Gilbertsville,
Cedarville, Horsham and Skippack.

This includes the following highways...
 Pennsylvania Turnpike between mile markers 301 and 303.
 Northeast Extension between mile markers 26 and 38.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Frequent cloud to ground lightning is occurring with this storm. Move
indoors immediately. Lightning is one of nature's leading killers.
Remember, if you can hear thunder, you are close enough to be struck
by lightning.

&&

LAT...LON 4038 7585 4041 7547 4020 7512 4013 7585
TIME...MOT...LOC 2133Z 264DEG 38KT 4022 7571 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Gorse

943 
WWUS51 KPHI 162142
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
542 PM EDT Mon May 16 2022

PAC011-029-091-162200-
/O.CON.KPHI.SV.W.0032.000000T0000Z-220516T2200Z/
Berks PA-Montgomery PA-Chester PA-
542 PM EDT Mon May 16 2022

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR SOUTHEASTERN BERKS...NORTHERN MONTGOMERY AND NORTHEASTERN CHESTER
COUNTIES...

At 542 PM EDT, a severe thunderstorm was located near Pottstown, or
19 miles north of West Chester, moving east at 45 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...
Pottstown, Lansdale, Souderton, Collegeville, Royersford, Trappe,
Hatfield, East Greenville, Schwenksville, Bally, Bechtelsville, Green
Lane, Pughtown, Spring Mount, Gilbertsville, Cedarville, Horsham,
Skippack, Stowe and Telford.

This includes Northeast Extension between mile markers 26 and 38.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Frequent cloud to ground lightning is occurring with this storm. Move
indoors immediately. Lightning is one of nature's leading killers.
Remember, if you can hear thunder, you are close enough to be struck
by lightning.

&&

LAT...LON 4041 7547 4020 7512 4014 7574 4039 7573
TIME...MOT...LOC 2142Z 257DEG 41KT 4024 7557 

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

$$

Gorse

052 
WWUS51 KPHI 162154
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
554 PM EDT Mon May 16 2022

PAC011-029-091-162204-
/O.EXP.KPHI.SV.W.0032.000000T0000Z-220516T2200Z/
Berks PA-Montgomery PA-Chester PA-
554 PM EDT Mon May 16 2022

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN BERKS...NORTHERN
MONTGOMERY AND NORTHEASTERN CHESTER COUNTIES WILL EXPIRE AT 600 PM
EDT...
                
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 will be allowed to expire.  However small
hail, gusty winds and heavy rain are still possible with this
thunderstorm.

A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
southeastern Pennsylvania.

LAT...LON 4041 7547 4020 7512 4014 7574 4039 7573
TIME...MOT...LOC 2154Z 257DEG 41KT 4026 7543 

$$

Gorse

The office that day

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

Issued	Product	Office	Counties	Lasted
May 16, 1:12 PM EDT	Special Weather Statement	PHI	Berks, Lehigh	63 min
May 16, 1:42 PM EDT	Severe Thunderstorm Warning	PHI	Berks	48 min
May 16, 2:17 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	43 min
May 16, 2:28 PM EDT	Severe Thunderstorm Warning	PHI	Berks	47 min
May 16, 5:09 PM EDT	Special Weather Statement	PHI	Montgomery	21 min
May 16, 5:56 PM EDT	Areal Flood Advisory	PHI	Chester, Delaware, Montgomery, Philadelphia	53 min
May 16, 5:59 PM EDT	Special Weather Statement	PHI	Bucks, Delaware, Montgomery, Philadelphia	31 min
May 16, 6:28 PM EDT	Special Weather Statement	PHI	Delaware, Philadelphia	32 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.