Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 51, NWS Philadelphia/Mount Holly

May 22, 2022Berks County, Chester County, Montgomery County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 22, 2022, 4:34 PM EDT for Berks County, Chester County, Montgomery County, Pennsylvania. It was in force for 56 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 22, 2022, 4:34 PM EDT (20:34 UTC)
Expired: May 22, 2022, 5:30 PM EDT
In force: 56 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

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

The radar

The Philadelphia radar (KDIX), 117 km from the middle of the area, began a volume at 20:35 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 22, 4:56 PM EDT	TSTM WND DMG	2 Ssw Union Twp, PA	NUMEROUS TREE LIMBS, SOME AS LARGE AS APPROXIMATELY 6 TO 12 INCHES IN DIAMETER, DOWN ON COLORADO DRIVE IN BIRDSBORO. ONE LARGE TREE LIMB PARTIALLY LANDED ON A SHED. TIME ESTIMATED FROM RADAR.
May 22, 5:00 PM EDT	TSTM WND DMG	Union Twp, PA	TREES AND WIRES DOWN.
May 22, 5:10 PM EDT	TSTM WND DMG	1 N Pottstown, PA	TREES DOWN.
May 22, 5:12 PM EDT	TSTM WND DMG	1 W East Coventry Twp, PA	REPORT OF SEVERAL LARGE TREE LIMBS AND ONE TREE DOWN ACROSS A ROAD IN EAST COVENTRY TWP. TIME ESTIMATED FROM RADAR. REPORT VIA FACEBOOK.

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 22, 1:53 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 8.6 hours before the alert went out and 197 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: 212 J/kg
Mixed-layer CIN: -211 J/kg
Mixed-layer LCL: 1294 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 25 m²/s²
0-3 km storm-relative helicity: 47 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

297 
WUUS51 KPHI 222034
SVRPHI
PAC011-029-091-222130-
/O.NEW.KPHI.SV.W.0051.220522T2034Z-220522T2130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
434 PM EDT Sun May 22 2022

The National Weather Service in Mount Holly NJ has issued a

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

* Until 530 PM EDT.

* At 434 PM EDT, a severe thunderstorm was located over Churchtown,
  or 7 miles east of New Holland, moving east at 25 mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Pottstown, Phoenixville, West Norriton, Collegeville, Royersford,
  Trappe, Honey Brook, Schwenksville, Elverson, New Morgan, Pughtown,
  Spring Mount, Valley Forge, Glenmoore, Chester Springs, Cedarville,
  King Of Prussia, Stowe, Spring City and Pottsgrove.

This includes the following highways...
 Pennsylvania Turnpike between mile markers 296 and 312.
 Interstate 176 in Pennsylvania between mile markers 1 and 5.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

In addition to 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 4033 7547 4010 7536 4003 7594 4011 7594
      4014 7588 4020 7597 4021 7597
TIME...MOT...LOC 2034Z 255DEG 23KT 4013 7595 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Gorse

1 follow-up statement

587 
WWUS51 KPHI 222051
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
451 PM EDT Sun May 22 2022

PAC011-029-091-222130-
/O.CON.KPHI.SV.W.0051.000000T0000Z-220522T2130Z/
Berks PA-Montgomery PA-Chester PA-
451 PM EDT Sun May 22 2022

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM EDT
FOR SOUTHEASTERN BERKS...WEST CENTRAL MONTGOMERY AND NORTHEASTERN
CHESTER COUNTIES...

At 451 PM EDT, a severe thunderstorm was located over Elverson, or 12
miles southeast of Reading, moving east at 25 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, Phoenixville, West Norriton, Collegeville, Royersford,
Trappe, Honey Brook, Schwenksville, Elverson, New Morgan, Pughtown,
Spring Mount, Valley Forge, Glenmoore, Chester Springs, Cedarville,
King Of Prussia, Stowe, Spring City and Pottsgrove.

This includes the following highways...
 Pennsylvania Turnpike between mile markers 296 and 312.
 Interstate 176 in Pennsylvania between mile markers 1 and 5.

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 4033 7547 4010 7536 4003 7594 4011 7594
      4014 7588 4020 7597 4021 7597
TIME...MOT...LOC 2051Z 256DEG 22KT 4018 7581 

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

$$

Gorse

The office that day

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

Issued	Product	Office	Counties	Lasted
May 22, 4:08 PM EDT	Severe Thunderstorm Warning	PHI	Berks	52 min
May 22, 5:02 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Chester, Lehigh, Montgomery, Northampton	58 min
May 22, 5:08 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Montgomery	52 min
May 22, 5:46 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery	30 min
May 22, 5:55 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware	41 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.