Severe Thunderstorm Warning 46, NWS Philadelphia/Mount Holly

Issued

Jun 19, 2017, 4:07 PM EDT (20:07 UTC)

Expired

Jun 19, 2017, 4:45 PM EDT

In force

38 min

Issued by

NWS Philadelphia/Mount Holly

Area

Storm-based polygon

Hail

0.75 in

Wind

60.0 mph

Counties New Castle County, DE, Chester County, PA, Delaware County, PA, Montgomery County, PA

The Philadelphia radar (KDIX), 109 km from the middle of the area, began a volume at 20:06 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.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

322 
WUUS51 KPHI 192007
SVRPHI
DEC003-PAC029-045-091-192045-
/O.NEW.KPHI.SV.W.0046.170619T2007Z-170619T2045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
407 PM EDT MON JUN 19 2017

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northwestern New Castle County in northern Delaware...
  Central Montgomery County in southeastern Pennsylvania...
  Chester County in southeastern Pennsylvania...
  Western Delaware County in southeastern Pennsylvania...

* Until 445 PM EDT

* At 407 PM EDT, severe thunderstorms were located along a line
  extending from Parkesburg to near Homeville to Lombard, moving
  northeast at 45 mph.

  HAZARD...60 mph wind gusts. 

  SOURCE...Radar indicated. 

  IMPACT...Expect damage to trees and power lines. 

* Severe thunderstorms will be near,
  Parkesburg, West Grove and Cochranville around 410 PM EDT. 
  Coatesville around 415 PM EDT. 
  Ladenberg and Kemblesville around 420 PM EDT. 
  Downingtown, North Star and Pike Creek around 425 PM EDT. 
  Kennett Square, Lionville-Marchwood, Hockessin, Lionville, 
  Marshallton, Chester Springs and Ashland around 430 PM EDT. 
  West Chester around 435 PM EDT. 
  Phoenixville, Royersford, Elam and Valley Forge around 440 PM EDT. 
  Norristown, West Norriton, East Norriton, Westtown, Collegeville, 
  Trappe, Paoli, Cheyney, Concordville and Gradyville around 445 PM 
  EDT. 

Other locations impacted by these severe thunderstorms include
Harleysville, Exton, South Coatesville, Modena, Thorndale, Chester
Heights, Evansburg, Malvern, West Goshen and Audubon.

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 3981 7596 3999 7592 4032 7532 4012 7534
      3992 7541 3983 7554 3972 7578 3972 7597
TIME...MOT...LOC 2007Z 238DEG 38KT 3994 7590 3983 7592 3970 7595 

HAIL...<.75IN
WIND...60MPH
 
$$

Drag

870 
WWUS51 KPHI 192022
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
422 PM EDT MON JUN 19 2017

DEC003-PAC029-045-091-192045-
/O.CON.KPHI.SV.W.0046.000000T0000Z-170619T2045Z/
New Castle DE-Montgomery PA-Chester PA-Delaware PA-
422 PM EDT MON JUN 19 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM EDT
FOR NORTHWESTERN NEW CASTLE...CENTRAL MONTGOMERY...CENTRAL CHESTER
AND WESTERN DELAWARE COUNTIES...

At 421 PM EDT, severe thunderstorms were located along a line
extending from near Downingtown to near Kennett Square to Ladenberg,
moving northeast at 45 mph.

HAZARD...60 mph wind gusts may be co9me widespread.  

SOURCE...Radar indicated this storm was intensifying. 

IMPACT...Expect damage to trees and power lines. 

These severe storms will be near...
  Downingtown around 425 PM EDT. 
  Lionville, Lionville-Marchwood and Marshallton around 430 PM EDT. 
  West Chester and Chester Springs around 435 PM EDT. 
  Phoenixville, Royersford, Elam and Valley Forge around 440 PM EDT. 
  Norristown, West Norriton, East Norriton, Westtown, Collegeville, 
  Trappe, Paoli, Cheyney, Concordville and Gradyville around 445 PM 
  EDT. 

Other locations impacted by these severe thunderstorms include Exton,
South Coatesville, Modena, Thorndale, Chester Heights, Evansburg,
Malvern, West Goshen, Audubon and Chesterbrook.

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 3989 7585 4000 7581 4032 7532 4012 7534
      3992 7541 3983 7554 3972 7578 3973 7585
TIME...MOT...LOC 2021Z 238DEG 38KT 4002 7574 3991 7576 3978 7579 

HAIL...<.75IN
WIND...60MPH
 
$$

Drag

Severe Thunderstorm Warnings in Pennsylvania, 2017Severe Thunderstorm Warnings in Delaware, 2017Every severe thunderstorm warning in 2017

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.