Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 132, NWS Philadelphia/Mount Holly

July 25, 20165 counties in Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 25, 2016, 4:19 AM EDT for 5 counties in Pennsylvania. It was in force for 41 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 25, 2016, 4:19 AM EDT (08:19 UTC)
Expired: Jul 25, 2016, 5:00 AM EDT
In force: 41 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Bucks County, PA, Chester County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 54 km from the middle of the area, began a volume at 08:23 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

Brookhaven, NY (KOKX), launched 00:00Z, 8.3 hours before the alert went out and 200 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1555 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 64 m²/s²
0-3 km storm-relative helicity: 104 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

197 
WUUS51 KPHI 250819
SVRPHI
PAC017-029-045-091-101-250900-
/O.NEW.KPHI.SV.W.0132.160725T0819Z-160725T0900Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
419 AM EDT MON JUL 25 2016

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ  HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EAST CENTRAL CHESTER COUNTY IN SOUTHEASTERN PENNSYLVANIA...
  SOUTHERN BUCKS COUNTY IN SOUTHEASTERN PENNSYLVANIA...
  NORTHEASTERN DELAWARE COUNTY IN SOUTHEASTERN PENNSYLVANIA...
  SOUTHEASTERN MONTGOMERY COUNTY IN SOUTHEASTERN PENNSYLVANIA...
  PHILADELPHIA COUNTY IN SOUTHEASTERN PENNSYLVANIA...

* UNTIL 500 AM EDT

* AT 419 AM EDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM HATFIELD TO NEAR EAST NORRITON TO NEWTOWN SQUARE...
  MOVING EAST AT 35 MPH.

  HAZARD...60 MPH WIND GUSTS AND PENNY SIZE HAIL. 

  SOURCE...RADAR INDICATED. 

  IMPACT...EXPECT DAMAGE TO ROOFS...SIDING...AND TREES. 

* LOCATIONS IMPACTED INCLUDE...
  PHILADELPHIA...BENSALEM...EWING...NORRISTOWN...LANSDALE...
  WEST NORRITON...EAST NORRITON...BRISTOL...DOYLESTOWN...
  CONSHOHOCKEN...PALMYRA...HATBORO...SOUDERTON...AMBLER...
  JENKINTOWN...NARBERTH...CHALFONT...HATFIELD...
  BEVERLY AND ROCKLEDGE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL SEND YOUR REPORT TO THE NATIONAL WEATHER SERVICE
OFFICE IN MOUNT HOLLY NJ .

&&

LAT...LON 4012 7480 4013 7482 4011 7483 4007 7492
      4005 7497 4003 7500 3996 7514 3997 7549
      4015 7536 4032 7533 4034 7494 4016 7473
TIME...MOT...LOC 0819Z 271DEG 31KT 4028 7526 4014 7529 3999 7542 

HAIL...0.75IN
WIND...60MPH
 
$$
MANNING

2 follow-up statements

600 
WWUS51 KPHI 250842
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
442 AM EDT MON JUL 25 2016

PAC029-250852-
/O.CAN.KPHI.SV.W.0132.000000T0000Z-160725T0900Z/
CHESTER PA-
442 AM EDT MON JUL 25 2016

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL CHESTER COUNTY IS
CANCELLED...

THE STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE WARNED
AREA THEREFORE THE WARNING HAS BEEN CANCELLED.

LAT...LON 4012 7480 4013 7482 4011 7483 4005 7497
      3996 7514 3997 7547 3999 7544 3999 7545
      4013 7523 4029 7518 4030 7490 4016 7473
TIME...MOT...LOC 0842Z 270DEG 31KT 4028 7502 4014 7505 3999 7523 

$$

PAC017-045-091-101-250900-
/O.CON.KPHI.SV.W.0132.000000T0000Z-160725T0900Z/
BUCKS PA-DELAWARE PA-MONTGOMERY PA-PHILADELPHIA PA-
442 AM EDT MON JUL 25 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 AM EDT
FOR SOUTHEASTERN BUCKS...NORTHEASTERN DELAWARE...SOUTHEASTERN
MONTGOMERY AND PHILADELPHIA COUNTIES...

AT 442 AM EDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM NEAR RICHBORO TO BRYN ATHYN TO ROXBOROUGH...MOVING
EAST AT 35 MPH.

HAZARD...60 MPH WIND GUSTS. 

SOURCE...RADAR INDICATED. 

IMPACT...EXPECT DAMAGE TO ROOFS...SIDING...AND TREES. 

LOCATIONS IMPACTED INCLUDE...
PHILADELPHIA...BENSALEM...BRISTOL...CONSHOHOCKEN...HATBORO...
AMBLER...JENKINTOWN...NARBERTH...BEVERLY...ROCKLEDGE...YARDLEY...
NEWTOWN...TULLYTOWN...ABINGTON...LANGHORNE...BRYN ATHYN...IVYLAND...
MORRIS PARK...LEVITTOWN AND ANDALUSIA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

TO REPORT SEVERE WEATHER CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY.
THEY WILL SEND YOUR REPORT TO THE NATIONAL WEATHER SERVICE OFFICE IN
MOUNT HOLLY NJ.

&&

LAT...LON 4012 7480 4013 7482 4011 7483 4005 7497
      3996 7514 3997 7547 3999 7544 3999 7545
      4013 7523 4029 7518 4030 7490 4016 7473
TIME...MOT...LOC 0842Z 270DEG 31KT 4028 7502 4014 7505 3999 7523 

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

676 
WWUS51 KPHI 250858
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
458 AM EDT MON JUL 25 2016

PAC017-045-091-101-250907-
/O.EXP.KPHI.SV.W.0132.000000T0000Z-160725T0900Z/
BUCKS PA-DELAWARE PA-MONTGOMERY PA-PHILADELPHIA PA-
458 AM EDT MON JUL 25 2016

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN BUCKS...
NORTHEASTERN DELAWARE...SOUTHEASTERN MONTGOMERY AND PHILADELPHIA
COUNTIES WILL EXPIRE AT 500 AM EDT...
            
THE STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSE AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE. HOWEVER GUSTY WINDS
ARE STILL POSSIBLE WITH THESE THUNDERSTORMS.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
MOUNT HOLLY NJ .

REMEMBER...A SEVERE THUNDERSTORM WARNING STILL REMAINS IN EFFECT FOR
SOUTHWEST PHILADELPHIA AND DELAWARE COUNTIES IN PENNSYLVANIA UNTIL
545 AM. 

LAT...LON 4012 7480 4013 7482 4011 7483 4005 7497
      3996 7514 3997 7547 3999 7544 3999 7545
      4013 7523 4029 7518 4030 7490 4016 7473
TIME...MOT...LOC 0854Z 271DEG 31KT 4028 7502 4014 7505 3999 7523 

$$
MANNING

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 25, 3:21 AM EDT	Special Weather Statement	PHI	Chester, Montgomery	39 min
Jul 25, 3:55 AM EDT	Special Weather Statement	PHI	Bucks, Delaware, Montgomery, Philadelphia	50 min
Jul 25, 4:54 AM EDT	Severe Thunderstorm Warning	PHI	Delaware, Philadelphia	51 min
Jul 25, 3:15 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	45 min
Jul 25, 3:52 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Lehigh, Monroe, Northampton	53 min
Jul 25, 4:00 PM EDT	Special Weather Statement	PHI	Lehigh	30 min
Jul 25, 4:34 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Lehigh, Northampton	56 min
Jul 25, 4:37 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	38 min
Jul 25, 5:15 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	45 min
Jul 25, 5:19 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Carbon, Lehigh, Northampton	56 min
Jul 25, 5:57 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Lehigh, Northampton	48 min
Jul 25, 5:58 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	47 min
Jul 25, 6:01 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery, Philadelphia	44 min
Jul 25, 6:39 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	40 min
Jul 25, 6:43 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery, Philadelphia	62 min
Jul 25, 6:55 PM EDT	Areal Flood Advisory	PHI	Bucks, Montgomery, Philadelphia	2 hr
Jul 25, 7:12 PM EDT	Special Weather Statement	PHI	Chester, Delaware, Philadelphia	63 min
Jul 25, 7:17 PM EDT	Flash Flood Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	4 hr

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2016 Every severe thunderstorm warning in 2016

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.