Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 105, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 17, 2017, 1:20 PM EDT for Berks County, Pennsylvania. It was in force for 40 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 17, 2017, 1:20 PM EDT (17:20 UTC)
- Expired
- Jul 17, 2017, 2:00 PM EDT
- In force
- 40 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Berks County, PA
The radar
The State College radar (KCCX), 156 km from the middle of the area, began a volume at 17:19 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 nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 5.3 hours before the alert went out and 199 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
- 1198 J/kg
- Mixed-layer CIN
- -50 J/kg
- Mixed-layer LCL
- 1021 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 40 m²/s²
- 0-3 km storm-relative helicity
- 28 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted.
824
WUUS51 KPHI 171720
SVRPHI
PAC011-171800-
/O.NEW.KPHI.SV.W.0105.170717T1720Z-170717T1800Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
120 PM EDT MON JUL 17 2017
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Northwestern Berks County in eastern Pennsylvania...
* Until 200 PM EDT
* At 120 PM EDT, a severe thunderstorm was located near Pine Grove,
or 9 miles north of Myerstown, moving northeast at 5 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Expect damage to
trees and power lines.
* Locations impacted include...
Strausstown.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4052 7634 4052 7625 4058 7606 4054 7601
4038 7626 4049 7643
TIME...MOT...LOC 1720Z 222DEG 6KT 4051 7630
HAIL...1.00IN
WIND...60MPH
$$
SFJ2 follow-up statements
275
WWUS51 KPHI 171737
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
137 PM EDT MON JUL 17 2017
PAC011-171800-
/O.CON.KPHI.SV.W.0105.000000T0000Z-170717T1800Z/
Berks PA-
137 PM EDT MON JUL 17 2017
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 200 PM EDT
FOR NORTHWESTERN BERKS COUNTY...
At 136 PM EDT, a severe thunderstorm was located near Strausstown, or
7 miles north of Myerstown, and is nearly stationary.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Expect damage to
trees and power lines.
Locations impacted include...
Strausstown.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
In addition to large hail and damaging winds...frequent cloud to
ground lightning is occurring with this storm. Move indoors
immediately. Remember...if you can hear thunder...you are close
enough to be struck by lightning.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4052 7634 4052 7625 4058 7606 4052 7605
4040 7629 4049 7643
TIME...MOT...LOC 1736Z 272DEG 1KT 4048 7630
HAIL...1.00IN
WIND...60MPH
$$
SFJ225
WWUS51 KPHI 171755
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
155 PM EDT MON JUL 17 2017
PAC011-171804-
/O.EXP.KPHI.SV.W.0105.000000T0000Z-170717T1800Z/
Berks PA-
155 PM EDT MON JUL 17 2017
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN BERKS COUNTY WILL
EXPIRE AT 200 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 small
hail, frequent lightning, and heavy rain are still possible with
this thunderstorm. A flash flood warning remains in effect.
LAT...LON 4052 7634 4052 7625 4058 7606 4052 7605
4040 7629 4049 7643
TIME...MOT...LOC 1754Z 222DEG 6KT 4050 7627
$$
SFJThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 17, 1:09 PM EDT | Special Weather Statement | PHI | Lehigh | 36 min |
| Jul 17, 1:24 PM EDT | Areal Flood Advisory | PHI | Berks | 5 hr |
| Jul 17, 1:41 PM EDT | Flash Flood Warning | PHI | Berks | 7 hr |
| Jul 17, 1:57 PM EDT | Special Weather Statement | PHI | Lebanon | 33 min |
| Jul 17, 3:16 PM EDT | Areal Flood Advisory | PHI | Berks | 119 min |
| Jul 17, 3:56 PM EDT | Areal Flood Advisory | PHI | Bucks, Lehigh, Monroe, Northampton | 4 hr |
| Jul 17, 4:24 PM EDT | Special Weather Statement | PHI | Northampton | 51 min |
| Jul 17, 4:35 PM EDT | Areal Flood Advisory | PHI | Monroe, Northampton | 115 min |
| Jul 17, 4:44 PM EDT | Areal Flood Advisory | PHI | Bucks, Delaware, Montgomery, Philadelphia | 3 hr |
| Jul 17, 4:56 PM EDT | Special Weather Statement | PHI | Philadelphia | 49 min |
| Jul 17, 4:57 PM EDT | Special Weather Statement | PHI | Chester | 33 min |
| Jul 17, 5:51 PM EDT | Special Weather Statement | PHI | Bucks | 39 min |
| Jul 17, 5:55 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.