Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 160, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 12, 2017, 5:24 PM EDT for Berks County, Pennsylvania. It was in force for 51 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
- Aug 12, 2017, 5:24 PM EDT (21:24 UTC)
- Expired
- Aug 12, 2017, 6:15 PM EDT
- In force
- 51 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Berks County, PA
The radar
The Philadelphia radar (KDIX), 145 km from the middle of the area, began a volume at 21:26 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 |
|---|---|---|---|
| Aug 12, 2:44 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 9.4 hours before the alert went out and 192 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
- 248 J/kg
- Mixed-layer CIN
- -78 J/kg
- Mixed-layer LCL
- 772 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 12 m²/s²
- 0-3 km storm-relative helicity
- 78 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
954
WUUS51 KPHI 122124
SVRPHI
PAC011-122215-
/O.NEW.KPHI.SV.W.0160.170812T2124Z-170812T2215Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
524 PM EDT SAT AUG 12 2017
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Southern Berks County in eastern Pennsylvania...
* Until 615 PM EDT
* At 522 PM EDT, a severe thunderstorm was located over
Kleinfeltersville, or near Myerstown, moving east at 25 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and power lines.
* Locations impacted include...
Reading, Wyomissing, Birdsboro, Sinking Spring, Womelsdorf,
Wernersville, New Morgan, Spring Ridge, Shillington, West Reading,
Mount Penn, Mohnton, Kenhorst, St. Lawrence, Wyomissing Hills, West
Lawn, Lorane, Reiffton, Whitfield and West Wyomissing.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
In addition to 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.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4043 7630 4035 7573 4019 7579 4014 7587
4042 7630
TIME...MOT...LOC 2122Z 284DEG 23KT 4031 7625
HAIL...<.75IN
WIND...60MPH
$$
Meola2 follow-up statements
784 WWUS51 KPHI 122152 SVSPHI Severe Weather Statement National Weather Service Mount Holly NJ 552 PM EDT SAT AUG 12 2017 PAC011-122215- /O.CON.KPHI.SV.W.0160.000000T0000Z-170812T2215Z/ Berks PA- 552 PM EDT SAT AUG 12 2017 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT FOR SOUTH CENTRAL BERKS COUNTY... At 552 PM EDT, a severe thunderstorm was located over Adamstown, or 7 miles northeast of Ephrata, moving east at 20 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to trees and power lines. Locations impacted include... Reading, Wyomissing, Birdsboro, Sinking Spring, Wernersville, New Morgan, Shillington, Mohnton, Kenhorst, West Lawn, Lorane, West Wyomissing, Flying Hills, Reiffton, Whitfield and Wyomissing Hills. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. In addition to damaging winds...frequent cloud to ground lightning is occurring with this storm. Move indoors immediately. Remember... if you can hear thunder...you are close enough to be struck by lightning. Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 4030 7575 4019 7579 4014 7587 4036 7620 TIME...MOT...LOC 2152Z 287DEG 18KT 4026 7607 HAIL...<.75IN WIND...60MPH $$ Meola
132
WWUS51 KPHI 122215
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
615 PM EDT SAT AUG 12 2017
PAC011-122225-
/O.EXP.KPHI.SV.W.0160.000000T0000Z-170812T2215Z/
Berks PA-
615 PM EDT SAT AUG 12 2017
...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL BERKS COUNTY HAS
EXPIRED...
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 has been allowed to expire.
A severe thunderstorm watch remains in effect until 900 PM EDT for
eastern Pennsylvania.
LAT...LON 4030 7575 4019 7579 4014 7587 4036 7620
TIME...MOT...LOC 2215Z 284DEG 23KT 4023 7591
$$
MeolaThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 10:49 PM EDT | Special Weather Statement | PHI | Berks, Lehigh, Northampton | 41 min |
| Aug 11, 11:05 PM EDT | Areal Flood Advisory | PHI | Berks, Carbon, Lehigh, Monroe, Northampton | 5 hr |
| Aug 12, 5:00 PM EDT | Special Weather Statement | PHI | Berks | 60 min |
| Aug 12, 5:39 PM EDT | Areal Flood Advisory | PHI | Berks | 4 hr |
| Aug 12, 6:18 PM EDT | Special Weather Statement | PHI | Chester | 27 min |
| Aug 12, 7:10 PM EDT | Special Weather Statement | PHI | Chester | 50 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2017Every severe thunderstorm warning in 2017
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.