Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 16, NWS Philadelphia/Mount Holly

March 31, 20225 counties in Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Mar 31, 2022, 8:47 PM EDT for 5 counties in Pennsylvania. It was in force for 58 min. 7 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: Mar 31, 2022, 8:47 PM EDT (00:47 UTC)
Expired: Mar 31, 2022, 9:45 PM EDT
In force: 58 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Berks County, PA, Bucks County, PA, Chester County, PA, Lehigh County, PA, Montgomery County, PA

The radar

The Philadelphia radar (KDIX), 110 km from the middle of the area, began a volume at 00:46 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.

What was reported inside it

Time	Report	Where	Remark
Mar 31, 9:10 PM EDT	HAIL 0.7	Pottstown, PA
Mar 31, 9:15 PM EDT	TSTM WND DMG	1 W South Coventry Twp, PA	DOWNED TREE OR LIMBS ON WIRES NEAR GRACE RD AT COVENTRYVILLE RD. TIME ESTIMATED FROM RADAR.
Mar 31, 9:20 PM EDT	TSTM WND DMG	Bally, PA	TREE DOWN AT SYCAMORE RD AND N CHURCH ST. TIME ESTIMATED FROM RADAR.
Mar 31, 9:48 PM EDT	TORNADO	1 Wnw Dublin, PA	A CONFIRMED TORNADO IN PORTIONS OF HILLTOWN TOWNSHIP AND BEDMINSTER TOWNSHIP IN BUCKS COUNTY WAS RATED AN EF1 WITH MAXIMUM WINDS OF 100 MPH. IT OCCURED FROM 9:48 PM TO 9:52 PM. NUMEROUS TREES WERE SNAPPED AND UPROOTED, WITH SOME SHINGLES BLOWN OFF SOME HOMES A
Mar 31, 9:50 PM EDT	TSTM WND DMG	1 Ssw Bedminster, PA	WIRES DOWN WITH POLES SNAPPED IN BEDMINSTER TWP. TREES ALSO SNAPPED AND UPROOTED. SOME ROADS REPORTED IMPASSABLE. KDIX INDICATED TDS. PROBABLE TORNADO. TIME ESTIMATED FROM RADAR.
Mar 31, 9:50 PM EDT	TSTM WND DMG	2 N Dublin, PA	WIRES DOWN AT ELEPHANT ROAD & BEDMINSTER ROAD. TIME ESTIMATED FROM KDIX.
Mar 31, 9:50 PM EDT	HAIL 0.75	Skippack, PA	TIME ESTIMATED FROM RADAR.

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
Mar 31, 4:20 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 00:00Z, 0.8 hours before the alert went out and 246 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: 4 J/kg
Mixed-layer CIN: -379 J/kg
Mixed-layer LCL: 445 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 263 m²/s²
0-3 km storm-relative helicity: 393 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

337 
WUUS51 KPHI 010047
SVRPHI
PAC011-017-029-077-091-010145-
/O.NEW.KPHI.SV.W.0016.220401T0047Z-220401T0145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
847 PM EDT Thu Mar 31 2022

The National Weather Service in Mount Holly NJ has issued a

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

* Until 945 PM EDT.

* At 846 PM EDT, severe thunderstorms were located along a line
  extending from near Wyomissing to near Churchtown to near Strasburg
  to near Wakefield, moving northeast at 50 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...
  Reading, West Chester, Norristown, Pottstown, Phoenixville,
  Lansdale, West Norriton, East Norriton, Coatesville, Emmaus,
  Westtown, Wyomissing, Quakertown, Perkasie, Doylestown, Byram,
  Downingtown, Souderton, Bedminster and Kennett Square.

This includes the following highways...
 Pennsylvania Turnpike between mile markers 296 and 332.
 Northeast Extension between mile markers 21 and 52.
 Interstate 76 in Pennsylvania between mile markers 327 and 329.
 Interstate 78 in Pennsylvania between mile markers 61 and 63.
 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 damaging winds, frequent cloud to ground lightning is 
occurring with some of these storms. Move indoors immediately. 
Remember, if you can hear thunder, you are close enough to be struck 
by lightning.

&&

LAT...LON 3976 7606 3983 7604 3987 7599 3995 7600
      4004 7593 4011 7594 4014 7588 4025 7605
      4028 7604 4058 7541 4054 7533 4055 7531
      4046 7508 4040 7504 4041 7500 4011 7530
      4004 7541 3984 7564 3972 7612
TIME...MOT...LOC 0046Z 237DEG 45KT 4026 7596 4010 7596 3996 7613 3975
7622

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

$$

Gorse

2 follow-up statements

009 
WWUS51 KPHI 010110
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
910 PM EDT Thu Mar 31 2022

PAC011-017-029-077-091-010145-
/O.CON.KPHI.SV.W.0016.000000T0000Z-220401T0145Z/
Berks PA-Lehigh PA-Montgomery PA-Bucks PA-Chester PA-
910 PM EDT Thu Mar 31 2022

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 PM EDT
FOR SOUTHEASTERN BERKS...SOUTHEASTERN LEHIGH...MONTGOMERY...
NORTHWESTERN BUCKS AND CHESTER COUNTIES...

At 910 PM EDT, severe thunderstorms were located along a line
extending from near Bally to near Bechtelsville to Cedarville to near
Honey Brook to near Glen Roy, moving northeast at 50 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...
West Chester, Norristown, Pottstown, Phoenixville, Lansdale, West
Norriton, East Norriton, Coatesville, Emmaus, Westtown, Quakertown,
Perkasie, Doylestown, Byram, Downingtown, Souderton, Bedminster,
Kennett Square, Birdsboro and Collegeville.

This includes the following highways...
 Pennsylvania Turnpike between mile markers 299 and 332.
 Northeast Extension between mile markers 21 and 52.
 Interstate 76 in Pennsylvania between mile markers 327 and 329.
 Interstate 78 in Pennsylvania between mile markers 61 and 63.

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 some of these 
storms. 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 3976 7606 3983 7604 3987 7599 3995 7600
      4004 7593 4011 7594 4014 7588 4039 7581
      4058 7541 4054 7533 4055 7531 4046 7508
      4040 7504 4041 7500 4011 7530 4004 7541
      3984 7564 3972 7612
TIME...MOT...LOC 0110Z 237DEG 41KT 4044 7561 4035 7569 4022 7569 4005
7587 3975 7610

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

$$

Gorse

382 
WWUS51 KPHI 010132
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
932 PM EDT Thu Mar 31 2022

PAC011-017-029-077-091-010145-
/O.CON.KPHI.SV.W.0016.000000T0000Z-220401T0145Z/
Berks PA-Lehigh PA-Montgomery PA-Bucks PA-Chester PA-
932 PM EDT Thu Mar 31 2022

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 PM EDT
FOR SOUTHEASTERN BERKS...SOUTHEASTERN LEHIGH...MONTGOMERY...
NORTHWESTERN BUCKS AND CHESTER COUNTIES...

At 931 PM EDT, severe thunderstorms were located along a line
extending from Springtown to Quakertown to near Souderton to
Phoenixville to Oxford, moving northeast at 55 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...
West Chester, Norristown, Pottstown, Phoenixville, Lansdale, West
Norriton, East Norriton, Coatesville, Westtown, Quakertown, Perkasie,
Doylestown, Byram, Downingtown, Souderton, Bedminster, Kennett
Square, Collegeville, Oxford and Royersford.

This includes the following highways...
 Pennsylvania Turnpike between mile markers 303 and 332.
 Northeast Extension between mile markers 21 and 49.
 Interstate 76 in Pennsylvania between mile markers 327 and 329.
 Interstate 78 in Pennsylvania between mile markers 62 and 63.

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 some of these 
storms. 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 3976 7606 3983 7604 3987 7599 3995 7600
      4001 7592 4012 7584 4037 7560 4058 7541
      4054 7533 4055 7531 4046 7508 4040 7504
      4041 7500 4011 7530 4004 7541 3984 7564
      3972 7612
TIME...MOT...LOC 0131Z 242DEG 46KT 4054 7528 4045 7536 4032 7536 4015
7554 3979 7594

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 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
Mar 31, 8:04 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe, Northampton	41 min
Mar 31, 8:14 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Lehigh, Northampton	46 min
Mar 31, 8:40 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Northampton	50 min
Mar 31, 9:12 PM EDT	Flash Flood Warning	PHI	Lehigh, Northampton	2 hr
Mar 31, 9:36 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Delaware, Montgomery, Northampton, Philadelphia	54 min
Mar 31, 9:49 PM EDT	Tornado Warning	PHI	Bucks	16 min
Mar 31, 10:21 PM EDT	Areal Flood Advisory	PHI	Bucks, Chester, Delaware, Montgomery	61 min
Mar 31, 10:23 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	25 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.