Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 96, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 21, 2021, 6:08 PM EDT for Berks County, Lehigh County, Pennsylvania. It was in force for 52 min. 2 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
- Jun 21, 2021, 6:08 PM EDT (22:08 UTC)
- Expired
- Jun 21, 2021, 7:00 PM EDT
- In force
- 52 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Berks County, PA, Lehigh County, PA
The radar
The Philadelphia radar (KDIX), 151 km from the middle of the area, began a volume at 22:08 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 |
|---|---|---|---|
| Jun 21, 6:26 PM EDT | TSTM WND DMG | 2 W Albany Twp, PA | DOWNED TREES AND WIRES NEAR HAWK MOUNTAIN ROAD. TIME ESTIMATED FROM RADAR. |
| Jun 21, 6:48 PM EDT | TSTM WND DMG | Robesonia, PA | TREE AND WIRES DOWN. |
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 |
|---|---|---|---|
| Jun 21, 4:33 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 10.1 hours before the alert went out and 215 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.
- Mixed-layer CAPE
- 329 J/kg
- Mixed-layer CIN
- -164 J/kg
- Mixed-layer LCL
- 801 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 33 m²/s²
- 0-3 km storm-relative helicity
- 40 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
296
WUUS51 KPHI 212208
SVRPHI
PAC011-077-212300-
/O.NEW.KPHI.SV.W.0096.210621T2208Z-210621T2300Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
608 PM EDT Mon Jun 21 2021
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Northern Berks County in eastern Pennsylvania...
Northwestern Lehigh County in eastern Pennsylvania...
* Until 700 PM EDT.
* At 607 PM EDT, a severe thunderstorm was located near
Shoemakersville, or 10 miles southeast of Schuylkill Haven, moving
northeast at 30 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...
Kutztown, Hamburg, Sinking Spring, Womelsdorf, Wernersville,
Robesonia, Leesport, Shoemakersville, Bernville, Strausstown,
Lenhartsville, Fairview Hgts, Wanamakers, New Tripoli, Claussville,
Spring Ridge, Centerport and Whitfield.
This includes Interstate 78 in Pennsylvania between mile markers 18
and 46.
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 4056 7609 4058 7606 4057 7602 4063 7600
4070 7583 4073 7577 4064 7562 4028 7609
4032 7616 4052 7624
TIME...MOT...LOC 2207Z 224DEG 25KT 4051 7606
HAIL...1.00IN
WIND...60MPH
$$
CMS3 follow-up statements
703
WWUS51 KPHI 212232
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
632 PM EDT Mon Jun 21 2021
PAC011-077-212300-
/O.CON.KPHI.SV.W.0096.000000T0000Z-210621T2300Z/
Berks PA-Lehigh PA-
632 PM EDT Mon Jun 21 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR NORTHERN BERKS AND NORTHWESTERN LEHIGH COUNTIES...
At 632 PM EDT, a severe thunderstorm was located near Wanamakers, or
11 miles south of Tamaqua, moving northeast at 30 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Wind damage to roofs,
siding, trees, and power lines is possible.
Locations impacted include...
Kutztown, Hamburg, Sinking Spring, Womelsdorf, Wernersville,
Robesonia, Leesport, Shoemakersville, Bernville, Strausstown,
Lenhartsville, Fairview Hgts, Wanamakers, New Tripoli, Claussville,
Spring Ridge, Centerport and Whitfield.
This includes Interstate 78 in Pennsylvania between mile markers 18
and 46.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4056 7609 4058 7606 4057 7602 4063 7600
4070 7583 4073 7577 4064 7562 4028 7609
4032 7616 4052 7624
TIME...MOT...LOC 2232Z 224DEG 25KT 4064 7590
HAIL...1.00IN
WIND...60MPH
$$
CMS013
WWUS51 KPHI 212245
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
645 PM EDT Mon Jun 21 2021
PAC011-077-212300-
/O.CON.KPHI.SV.W.0096.000000T0000Z-210621T2300Z/
Berks PA-Lehigh PA-
645 PM EDT Mon Jun 21 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR NORTHERN BERKS AND NORTHWESTERN LEHIGH COUNTIES...
At 645 PM EDT, a severe thunderstorm was located near Lenhartsville,
or 16 miles southeast of Tamaqua, moving northeast at 20 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...
Kutztown, Hamburg, Sinking Spring, Womelsdorf, Wernersville,
Robesonia, Leesport, Shoemakersville, Bernville, Strausstown,
Lenhartsville, Fairview Hgts, Wanamakers, New Tripoli, Claussville,
Spring Ridge, Centerport and Whitfield.
This includes Interstate 78 in Pennsylvania between mile markers 18
and 46.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4056 7609 4058 7606 4057 7602 4063 7600
4070 7583 4073 7577 4064 7562 4028 7609
4032 7616 4052 7624
TIME...MOT...LOC 2245Z 228DEG 18KT 4059 7580
HAIL...0.75IN
WIND...60MPH
$$
CMS023
WWUS51 KPHI 212257
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
657 PM EDT Mon Jun 21 2021
PAC011-077-212306-
/O.EXP.KPHI.SV.W.0096.000000T0000Z-210621T2300Z/
Berks PA-Lehigh PA-
657 PM EDT Mon Jun 21 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN BERKS AND
NORTHWESTERN LEHIGH COUNTIES WILL EXPIRE AT 700 PM EDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However, gusty
winds are still possible with this thunderstorm.
A Severe Thunderstorm Watch remains in effect until midnight EDT for
eastern Pennsylvania.
LAT...LON 4056 7609 4058 7606 4057 7602 4063 7600
4070 7583 4073 7577 4064 7562 4028 7609
4032 7616 4052 7624
TIME...MOT...LOC 2256Z 224DEG 25KT 4064 7574
$$
CMSThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 20, 9:27 PM EDT | Special Weather Statement | PHI | Schuylkill | 33 min |
| Jun 20, 9:55 PM EDT | Special Weather Statement | PHI | Lebanon | 35 min |
| Jun 20, 10:04 PM EDT | Areal Flood Advisory | PHI | Berks | 86 min |
| Jun 20, 10:27 PM EDT | Special Weather Statement | PHI | Berks | 33 min |
| Jun 21, 4:35 AM EDT | Heat Advisory | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 15 hr |
| Jun 21, 6:21 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 54 min |
| Jun 21, 7:02 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Carbon, Lehigh, Northampton | 43 min |
| Jun 21, 7:12 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 48 min |
| Jun 21, 7:38 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Lehigh, Monroe, Northampton | 52 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2021Every severe thunderstorm warning in 2021
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.