Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2026
Severe Thunderstorm Warning 206, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 21, 2026, 2:18 PM EDT for Berks County, Lehigh County, Pennsylvania. It was in force for 42 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 21, 2026, 2:18 PM EDT (18:18 UTC)
- Expired
- Jul 21, 2026, 3:00 PM EDT
- In force
- 42 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Berks County, PA, Lehigh County, PA
The radar
The Philadelphia radar (KDIX), 131 km from the middle of the area, began a volume at 18:17 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.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 21, 2:06 PM EDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 6.3 hours before the alert went out and 228 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
- 941 J/kg
- Mixed-layer CIN
- -113 J/kg
- Mixed-layer LCL
- 772 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 68 m²/s²
- 0-3 km storm-relative helicity
- 112 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 0.9
The text
As transmitted.
761
WUUS51 KPHI 211818
SVRPHI
PAC011-077-211900-
/O.NEW.KPHI.SV.W.0206.260721T1818Z-260721T1900Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
218 PM EDT Tue Jul 21 2026
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Northeastern Berks County in eastern Pennsylvania...
Central Lehigh County in eastern Pennsylvania...
* Until 300 PM EDT.
* At 218 PM EDT, a severe thunderstorm was located near
Shoemakersville, or 10 miles north of Reading, moving east at 35
mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Allentown, Emmaus, Kutztown, Hamburg, Fleetwood, Topton, Leesport,
Shoemakersville, Lyons, Coffeetown, Zionsville, Ancient Oaks,
Claussville, Catasauqua, Coplay, Macungie, North Catasauqua,
Alburtis, Fullerton, and Hokendauqua.
This includes the following highways...
Northeast Extension between mile markers 48 and 61.
Interstate 78 in Pennsylvania between mile markers 38 and 59.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 900 PM EDT for eastern
Pennsylvania.
For your protection move to an interior room on the lowest floor of a
building.
A Tornado Watch remains in effect until 900 PM EDT for eastern
Pennsylvania.
&&
LAT...LON 4054 7599 4068 7550 4066 7547 4046 7546
4045 7598
TIME...MOT...LOC 1818Z 250DEG 31KT 4049 7590
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
AKL1 follow-up statement
908
WWUS51 KPHI 211845
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
245 PM EDT Tue Jul 21 2026
PAC011-077-211900-
/O.CON.KPHI.SV.W.0206.000000T0000Z-260721T1900Z/
Berks PA-Lehigh PA-
245 PM EDT Tue Jul 21 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM EDT
FOR EAST CENTRAL BERKS AND SOUTH CENTRAL LEHIGH COUNTIES...
At 245 PM EDT, a severe thunderstorm was located over Ancient Oaks,
or 7 miles southwest of Allentown, moving east at 40 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Allentown, Emmaus, Ancient Oaks, Zionsville, Catasauqua, Macungie,
Alburtis, and Fullerton.
This includes the following highways...
Northeast Extension between mile markers 48 and 58.
Interstate 78 in Pennsylvania between mile markers 48 and 59.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 900 PM EDT for eastern
Pennsylvania.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4046 7569 4058 7569 4065 7547 4046 7546
TIME...MOT...LOC 1845Z 265DEG 35KT 4052 7559
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
AKLThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 2:57 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Lehigh, Northampton | 37 min |
| Jul 21, 3:37 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 53 min |
| Jul 21, 3:47 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe | 43 min |
| Jul 21, 3:58 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 47 min |
| Jul 21, 4:23 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 52 min |
| Jul 21, 4:31 PM EDT | Flash Flood Warning | PHI | Chester, Delaware | 96 min |
| Jul 21, 4:38 PM EDT | Flash Flood Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 4 hr |
| Jul 21, 4:43 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 47 min |
| Jul 21, 5:30 PM EDT | Severe Thunderstorm Warning | PHI | Delaware | 45 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2026Every severe thunderstorm warning in 2026
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.