Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 36, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 18, 2018, 6:58 PM EDT for Berks County, Lehigh County, Pennsylvania. It was in force for 62 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 18, 2018, 6:58 PM EDT (22:58 UTC)
- Expired
- Jun 18, 2018, 8:00 PM EDT
- In force
- 62 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), 136 km from the middle of the area, began a volume at 23:00 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 18, 7:05 PM EDT | TSTM WND DMG | Upper Bern Twp, PA | TREES DOWN. |
| Jun 18, 7:15 PM EDT | TSTM WND DMG | Centre Twp, PA | TREES DOWN. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 11.0 hours before the alert went out and 216 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
- 4 J/kg
- Mixed-layer CIN
- -181 J/kg
- Mixed-layer LCL
- 1177 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- 33 m²/s²
- 0-3 km storm-relative helicity
- 67 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
872
WUUS51 KPHI 182258
SVRPHI
PAC011-077-190000-
/O.NEW.KPHI.SV.W.0036.180618T2258Z-180619T0000Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
658 PM EDT MON JUN 18 2018
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Berks County in eastern Pennsylvania...
Southern Lehigh County in eastern Pennsylvania...
* Until 800 PM EDT.
* At 658 PM EDT, severe thunderstorms were located along a line
extending from near Wanamakers to near Myerstown, 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, Reading, Emmaus, Wyomissing, Birdsboro, Kutztown,
Hamburg, Fleetwood, Sinking Spring, Laureldale, Womelsdorf,
Wernersville, Newmanstown, Topton, Leesport, Shoemakersville,
Bally, Bernville, Bechtelsville and Lyons.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4056 7612 4057 7602 4063 7599 4070 7582
4054 7534 4042 7549 4045 7553 4025 7569
4014 7587 4044 7634
TIME...MOT...LOC 2258Z 289DEG 30KT 4068 7581 4041 7627
HAIL...<.75IN
WIND...60MPH
$$
Iovino1 follow-up statement
906
WWUS51 KPHI 182333
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
733 PM EDT MON JUN 18 2018
PAC011-077-190000-
/O.CON.KPHI.SV.W.0036.000000T0000Z-180619T0000Z/
Berks PA-Lehigh PA-
733 PM EDT MON JUN 18 2018
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM EDT
FOR BERKS AND SOUTHERN LEHIGH COUNTIES...
At 732 PM EDT, severe thunderstorms were located along a line
extending from near Allentown to Reading, moving east at 35 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Allentown, Reading, Emmaus, Wyomissing, Birdsboro, Fleetwood, Sinking
Spring, Laureldale, Womelsdorf, Wernersville, Newmanstown, Topton,
Leesport, Bally, Bernville, Bechtelsville, Lyons, New Morgan, Spring
Ridge and Zionsville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4046 7600 4049 7589 4048 7578 4062 7557
4054 7534 4042 7549 4045 7553 4025 7569
4014 7587 4039 7626
TIME...MOT...LOC 2332Z 289DEG 30KT 4059 7546 4032 7592
HAIL...<.75IN
WIND...60MPH
$$
IovinoThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 18, 5:46 PM EDT | Special Weather Statement | PHI | Carbon, Monroe | 44 min |
| Jun 18, 6:10 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe | 50 min |
| Jun 18, 6:37 PM EDT | Special Weather Statement | PHI | Lehigh, Northampton | 53 min |
| Jun 18, 6:48 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Lehigh, Monroe, Northampton | 57 min |
| Jun 18, 6:56 PM EDT | Special Weather Statement | PHI | Berks, Lehigh | 64 min |
| Jun 18, 7:30 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Lehigh, Northampton | 60 min |
| Jun 18, 7:41 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Chester, Lehigh, Montgomery | 64 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.