Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 159, NWS Philadelphia/Mount Holly

August 22, 2022Lehigh County, Northampton County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 22, 2022, 5:01 PM EDT for Lehigh County, Northampton County, Pennsylvania. It was in force for 44 min. 10 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: Aug 22, 2022, 5:01 PM EDT (21:01 UTC)
Expired: Aug 22, 2022, 5:45 PM EDT
In force: 44 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Lehigh County, PA, Northampton County, PA

The radar

The Philadelphia radar (KDIX), 120 km from the middle of the area, began a volume at 21:01 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
Aug 22, 5:01 PM EDT	HAIL 1	1 Se North Whitehall Tw, PA	SEVERAL REPORTS OF DIME TO QUARTER SIZE HAIL IN THE WHITEHALL AREA.
Aug 22, 5:03 PM EDT	HAIL 0.88	Coplay, PA
Aug 22, 5:05 PM EDT	HAIL 0.5	1 W Hokendauqua, PA	REPORT FROM MPING: HALF-INCH (0.50 IN.).
Aug 22, 5:06 PM EDT	HAIL 1	North Catasauqua, PA	14 MINUTES OF DIME TO QUARTER SIZE HAIL FELL. TIME ESTIMATED FROM RADAR.
Aug 22, 5:10 PM EDT	HAIL 0.88	Northampton, PA
Aug 22, 5:12 PM EDT	HAIL 1	Coplay, PA
Aug 22, 5:15 PM EDT	TSTM WND GST 42	North Catasauqua, PA	TIME ESTIMATED FROM RADAR.
Aug 22, 5:28 PM EDT	HAIL 0.25	Bethlehem, PA
Aug 22, 5:40 PM EDT	HAIL 0.75	1 Nne Bethlehem Twp, PA
Aug 22, 5:40 PM EDT	HAIL 1	Bethlehem, PA	HAIL RANGING FROM DIME TO QUARTER SIZE.

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

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 9.0 hours before the alert went out and 222 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: 294 J/kg
Mixed-layer CIN: -27 J/kg
Mixed-layer LCL: 539 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 29 m²/s²
0-3 km storm-relative helicity: 43 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

651 
WUUS51 KPHI 222101
SVRPHI
PAC077-095-222145-
/O.NEW.KPHI.SV.W.0159.220822T2101Z-220822T2145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
501 PM EDT Mon Aug 22 2022

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northeastern Lehigh County in eastern Pennsylvania...
  Southwestern Northampton County in eastern Pennsylvania...

* Until 545 PM EDT.

* At 501 PM EDT, a severe thunderstorm was located over Northampton,
  or near Allentown, moving east at 15 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...
  Allentown, Bethlehem, Northampton, Hellertown, Nazareth,
  Slatington, Bath, Walnutport, Steuben, Coffeetown, Beersville,
  Lehigh University, Catasauqua, Fountain Hill, Coplay, North
  Catasauqua, Freemansburg, Chapman, Fullerton and Hokendauqua.

This includes the following highways...
 Northeast Extension between mile markers 57 and 64.
 Interstate 78 in Pennsylvania between mile markers 52 and 54, and
between mile markers 64 and 69.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4058 7561 4076 7560 4078 7529 4057 7530
TIME...MOT...LOC 2101Z 271DEG 12KT 4067 7552 

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

$$

Iovino

1 follow-up statement

397 
WWUS51 KPHI 222134
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
534 PM EDT Mon Aug 22 2022

PAC077-095-222145-
/O.CON.KPHI.SV.W.0159.000000T0000Z-220822T2145Z/
Lehigh PA-Northampton PA-
534 PM EDT Mon Aug 22 2022

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR EAST CENTRAL LEHIGH AND SOUTH CENTRAL NORTHAMPTON COUNTIES...

At 534 PM EDT, a severe thunderstorm was located over Steuben, or 7
miles northeast of Allentown, moving east at 15 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...
Allentown, Bethlehem, Hellertown, Nazareth, Bath, Steuben, Lehigh
University, Catasauqua, Fountain Hill, Freemansburg, Chapman and
Eastlawn Gardens.

This includes Interstate 78 in Pennsylvania between mile markers 66
and 69.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4061 7545 4074 7547 4078 7529 4057 7530
TIME...MOT...LOC 2134Z 271DEG 12KT 4067 7537 

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

$$

Iovino

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 22, 12:18 AM EDT	Areal Flood Advisory	PHI	Chester, Delaware	64 min
Aug 22, 2:01 AM EDT	Areal Flood Advisory	PHI	Philadelphia	99 min
Aug 22, 3:42 AM EDT	Areal Flood Advisory	PHI	Bucks	61 min
Aug 22, 11:39 AM EDT	Areal Flood Advisory	PHI	Bucks, Northampton	3 hr
Aug 22, 1:46 PM EDT	Areal Flood Advisory	PHI	Carbon, Lehigh, Monroe, Northampton	3 hr
Aug 22, 5:00 PM EDT	Areal Flood Advisory	PHI	Berks, Lehigh, Northampton	3 hr
Aug 22, 5:44 PM EDT	Severe Thunderstorm Warning	PHI	Northampton	46 min
Aug 22, 6:01 PM EDT	Flash Flood Warning	PHI	Lehigh	111 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.