Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 60, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 27, 2018, 6:40 PM EDT for Berks County, Pennsylvania. It was in force for 50 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
- Jul 27, 2018, 6:40 PM EDT (22:40 UTC)
- Expired
- Jul 27, 2018, 7:30 PM EDT
- In force
- 50 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), 123 km from the middle of the area, began a volume at 22:40 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 |
|---|---|---|---|
| Jul 27, 7:13 PM EDT | TSTM WND DMG | 1 Se Robeson Twp, PA | DEBRIS IN ROADWAY CAUSED BY STRONG WINDS ON PLOW ROAD IN ROBESON TWP. TIME ESTIMATED FROM RADAR. |
| Jul 27, 7:13 PM EDT | TSTM WND DMG | Wyomissing, PA | PHOTOS SHOW A LARGE HARDWOOD TREE UPROOTED AND FALLEN ON A HOUSE. TIME ESTIMATED FROM RADAR. |
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 |
|---|---|---|---|
| Jul 27, 1:17 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 10.7 hours before the alert went out and 214 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
- 958 J/kg
- Mixed-layer CIN
- -54 J/kg
- Mixed-layer LCL
- 1053 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 7 m²/s²
- 0-3 km storm-relative helicity
- 34 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
314
WUUS51 KPHI 272240
SVRPHI
PAC011-272330-
/O.NEW.KPHI.SV.W.0060.180727T2240Z-180727T2330Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
640 PM EDT FRI JUL 27 2018
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Southeastern Berks County in eastern Pennsylvania...
* Until 730 PM EDT.
* At 639 PM EDT, severe thunderstorms were located along a line
extending from Lyons to near Denver, moving east at 15 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Reading, Wyomissing, Birdsboro, Kutztown, Fleetwood, Sinking
Spring, Laureldale, Wernersville, Topton, Bally, Bechtelsville,
Lyons, New Morgan, Spring Ridge, Gilbertsville, Shillington, West
Reading, Boyertown, Mount Penn and Mohnton.
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.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4052 7578 4047 7556 4045 7553 4044 7553
4025 7569 4014 7587 4032 7615
TIME...MOT...LOC 2239Z 267DEG 11KT 4046 7575 4026 7611
HAIL...<.75IN
WIND...60MPH
$$
CMS2 follow-up statements
716
WWUS51 KPHI 272311
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
711 PM EDT FRI JUL 27 2018
PAC011-272330-
/O.CON.KPHI.SV.W.0060.000000T0000Z-180727T2330Z/
Berks PA-
711 PM EDT FRI JUL 27 2018
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM EDT
FOR SOUTHEASTERN BERKS COUNTY...
At 710 PM EDT, severe thunderstorms were located along a line
extending from near Topton to near New Morgan, moving east at 15 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Reading, Wyomissing, Birdsboro, Sinking Spring, Laureldale, Topton,
Bally, Bechtelsville, Lyons, New Morgan, Spring Ridge, Gilbertsville,
Shillington, West Reading, Boyertown, Mount Penn, Mohnton, Kenhorst,
St. Lawrence and West Lawn.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4030 7612 4041 7586 4051 7573 4047 7556
4045 7553 4044 7553 4025 7569 4014 7587
TIME...MOT...LOC 2310Z 276DEG 13KT 4049 7564 4019 7593
HAIL...<.75IN
WIND...60MPH
$$
CMS233
WWUS51 KPHI 272329
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
729 PM EDT FRI JUL 27 2018
PAC011-272338-
/O.EXP.KPHI.SV.W.0060.000000T0000Z-180727T2330Z/
Berks PA-
729 PM EDT FRI JUL 27 2018
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN BERKS COUNTY WILL
EXPIRE AT 730 PM EDT...
The storms which prompted the warning are moving out of the area.
Therefore, the warning will be allowed to expire. However gusty
winds and heavy rain are still possible with these thunderstorms.
A severe thunderstorm watch remains in effect until 1000 PM EDT for
eastern and southeastern Pennsylvania.
LAT...LON 4030 7612 4041 7586 4051 7573 4047 7556
4045 7553 4044 7553 4025 7569 4014 7587
TIME...MOT...LOC 2328Z 267DEG 11KT 4049 7557 4019 7586
$$
CMSThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 27, 9:50 AM EDT | Flash Flood Watch | PHI | Berks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more | 13 hr |
| Jul 27, 12:17 PM EDT | Areal Flood Advisory | PHI | Carbon, Monroe | 2 hr |
| Jul 27, 12:35 PM EDT | Flash Flood Warning | PHI | Monroe | 63 min |
| Jul 27, 1:02 PM EDT | Areal Flood Advisory | PHI | Berks | 3 hr |
| Jul 27, 1:08 PM EDT | Special Weather Statement | PHI | Bucks, Montgomery | 37 min |
| Jul 27, 1:19 PM EDT | Areal Flood Advisory | PHI | Bucks, Montgomery | 4 hr |
| Jul 27, 1:42 PM EDT | Special Weather Statement | PHI | Montgomery | 48 min |
| Jul 27, 3:11 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh | 49 min |
| Jul 27, 3:47 PM EDT | Areal Flood Advisory | PHI | Berks, Lehigh | 4 hr |
| Jul 27, 3:54 PM EDT | Flash Flood Warning | PHI | Berks | 4 hr |
| Jul 27, 4:27 PM EDT | Special Weather Statement | PHI | Philadelphia | 33 min |
| Jul 27, 4:33 PM EDT | Special Weather Statement | PHI | Carbon, Monroe | 27 min |
| Jul 27, 4:43 PM EDT | Areal Flood Advisory | PHI | Bucks, Montgomery, Philadelphia | 5 hr |
| Jul 27, 4:44 PM EDT | Areal Flood Advisory | PHI | Carbon, Monroe | 7 hr |
| Jul 27, 5:00 PM EDT | Flash Flood Warning | PHI | Monroe | 3 hr |
| Jul 27, 5:13 PM EDT | Special Weather Statement | PHI | Monroe | 47 min |
| Jul 27, 5:27 PM EDT | Areal Flood Advisory | PHI | Berks, Carbon, Lehigh, Northampton | 4 hr |
| Jul 27, 5:43 PM EDT | Special Weather Statement | PHI | Lehigh | 47 min |
| Jul 27, 6:03 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 42 min |
| Jul 27, 6:06 PM EDT | Areal Flood Advisory | PHI | Berks, Chester | 3 hr |
| Jul 27, 6:36 PM EDT | Special Weather Statement | PHI | Berks | 39 min |
| Jul 27, 7:03 PM EDT | Flash Flood Warning | PHI | Berks | 3 hr |
| Jul 27, 7:09 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 51 min |
| Jul 27, 7:37 PM EDT | Areal Flood Advisory | PHI | Berks, Bucks, Chester, Delaware, Lehigh, Montgomery | 116 min |
| Jul 27, 7:46 PM EDT | Special Weather Statement | PHI | Montgomery | 44 min |
| Jul 27, 7:49 PM EDT | Areal Flood Warning | PHI | Berks | 4 hr |
| Jul 27, 7:49 PM EDT | Special Weather Statement | PHI | Berks | 41 min |
| Jul 27, 7:53 PM EDT | Areal Flood Advisory | PHI | Berks, Lehigh, Montgomery | 110 min |
| Jul 27, 7:55 PM EDT | Areal Flood Advisory | PHI | Bucks, Lehigh, Montgomery, Northampton | 108 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2018Every severe thunderstorm warning in 2018
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.