Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2015
Severe Thunderstorm Warning 60, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 23, 2015, 5:28 PM EDT for Chester County, Delaware County, Pennsylvania; New Castle County, Delaware; Cecil County, Maryland. It was in force for 47 min. 14 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 23, 2015, 5:28 PM EDT (21:28 UTC)
- Expired
- Jun 23, 2015, 6:15 PM EDT
- In force
- 47 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties New Castle County, DE, Cecil County, MD, Chester County, PA, Delaware County, PA
The radar
The Dover AFB radar (KDOX), 107 km from the middle of the area, began a volume at 21:31 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 23, 5:28 PM EDT | TSTM WND DMG | Rising Sun, MD | TREES REPORTED DOWN. |
| Jun 23, 5:35 PM EDT | TSTM WND DMG | Hockessin, DE | TREES AND WIRES DOWN |
| Jun 23, 5:37 PM EDT | TSTM WND DMG | Glen Mills, PA | TREE DOWN ON A HOUSE |
| Jun 23, 5:39 PM EDT | TSTM WND DMG | Pike Creek, DE | TREES AND WIRES DOWN |
| Jun 23, 5:41 PM EDT | TSTM WND DMG | Newark, DE | TREES AND WIRES DOWN |
| Jun 23, 5:42 PM EDT | TSTM WND DMG | Greenville, DE | TREES AND WIRES DOWN |
| Jun 23, 5:45 PM EDT | TSTM WND DMG | Aston Twp, PA | MULTIPLE TREES REPORTED DOWN. SEVERAL OTHERS APPEAR TO HAVE BEEN SHEARED OFF AT THE TOP. |
| Jun 23, 5:45 PM EDT | TSTM WND DMG | Wilmington, DE | ROOF BLOWN OFF THIRD STORY BUILDING |
| Jun 23, 5:45 PM EDT | TSTM WND GST 62 | Talleyville, DE | |
| Jun 23, 5:45 PM EDT | TSTM WND GST 66 | New Castle County Airpo, DE | A 66 MPH WIND GUST WAS MEASURED AT THE NEW CASTLE COUNTY AIRPORT. |
| Jun 23, 5:45 PM EDT | TSTM WND GST 66 | New Castle County Airpo, DE | A 66 MPH WIND GUST WAS MEASURED AT THE NEW CASTLE COUNTY AIRPORT. IN ADDITION... A SUSTAINED WIND OF 53 MPH WAS MEASURED AT 546 PM. |
| Jun 23, 5:45 PM EDT | TSTM WND GST 67 | New Castle County Airpo, DE | |
| Jun 23, 5:48 PM EDT | TSTM WND DMG | Upland, PA | OVER 70 TREES REPORTED DOWN IN UPLAND PARK. |
| Jun 23, 5:50 PM EDT | TSTM WND DMG | Minquadale, DE | MULTIPLE TREES DOWN WITH SOME FALLING ONTO HOUSES. |
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 |
|---|---|---|---|
| Jun 23, 10:20 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 23, 4:09 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 9.5 hours before the alert went out and 167 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
- 387 J/kg
- Mixed-layer CIN
- -168 J/kg
- Mixed-layer LCL
- 1544 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 121 m²/s²
- 0-3 km storm-relative helicity
- 24 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted, in the capitals the NWS used until 2016.
632
WUUS51 KPHI 232128
SVRPHI
DEC003-MDC015-PAC029-045-232215-
/O.NEW.KPHI.SV.W.0060.150623T2128Z-150623T2215Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
528 PM EDT TUE JUN 23 2015
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHERN NEW CASTLE COUNTY IN NORTHERN DELAWARE...
WEST CENTRAL CECIL COUNTY IN NORTHEASTERN MARYLAND...
SOUTHWESTERN DELAWARE COUNTY IN SOUTHEASTERN PENNSYLVANIA...
SOUTHERN CHESTER COUNTY IN SOUTHEASTERN PENNSYLVANIA...
* UNTIL 615 PM EDT
* AT 527 PM EDT...DOPPLER RADAR INDICATED A LINE OF SEVERE
THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60
MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM
COCHRANVILLE TO OXFORD TO RICHARDSMERE...AND MOVING EAST AT 40 MPH.
* LOCATIONS IMPACTED INCLUDE...
WILMINGTON...NEWARK...CALVERT...WESTTOWN...ELSMERE...KENNETT
SQUARE...NEW CASTLE...OXFORD...NORTH EAST...WEST GROVE...RISING
SUN...NEWPORT...ARDEN...PLEASANT HILL...WOODLAWN...LADENBERG...
ELAM...NORTH STAR...CHERRY HILL AND BAY VIEW.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...LARGE HAIL...DEADLY
LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION...MOVE TO AN
INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY
RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER
COVERS THE ROAD.
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 ALSO OCCURRING WITH THESE STORMS...AND MAY
LEAD TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.
&&
LAT...LON 3989 7590 3995 7539 3981 7542 3971 7550
3972 7552 3968 7555 3959 7612 3963 7615
3966 7617
TIME...MOT...LOC 2127Z 262DEG 37KT 3988 7592 3979 7598 3971 7610
$$The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 23, 8:30 AM EDT | Special Weather Statement | PHI | Monroe | 60 min |
| Jun 23, 9:10 AM EDT | Special Weather Statement | PHI | Monroe | 35 min |
| Jun 23, 10:37 AM EDT | Special Weather Statement | PHI | Carbon, Monroe | 38 min |
| Jun 23, 11:13 AM EDT | Special Weather Statement | PHI | Monroe | 32 min |
| Jun 23, 1:31 PM EDT | Special Weather Statement | PHI | Carbon, Monroe, Northampton | 59 min |
| Jun 23, 1:41 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe | 49 min |
| Jun 23, 2:29 PM EDT | Severe Thunderstorm Warning | PHI | Monroe, Northampton | 46 min |
| Jun 23, 3:49 PM EDT | Special Weather Statement | PHI | Berks, Bucks, Chester, Montgomery | 86 min |
| Jun 23, 4:11 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh | 24 min |
| Jun 23, 4:44 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Montgomery | 61 min |
| Jun 23, 5:05 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Delaware, Montgomery | 40 min |
| Jun 23, 5:19 PM EDT | Areal Flood Advisory | PHI | Berks, Chester, Montgomery | 4 hr |
| Jun 23, 5:22 PM EDT | Tornado Warning | PHI | Chester | 23 min |
| Jun 23, 5:38 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 52 min |
| Jun 23, 5:44 PM EDT | Areal Flood Advisory | PHI | Chester, Delaware, Montgomery, Philadelphia | 4 hr |
| Jun 23, 6:18 PM EDT | Areal Flood Advisory | PHI | Monroe, Northampton | 4 hr |
| Jun 23, 6:14 PM EDT | Areal Flood Advisory | PHI | Kent, New Castle | 4 hr |
| Jun 23, 6:44 PM EDT | Severe Thunderstorm Warning | PHI | Kent | 76 min |
| Jun 23, 6:48 PM EDT | Areal Flood Advisory | PHI | Kent | 4 hr |
| Jun 23, 7:41 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 65 min |
| Jun 23, 7:06 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's, Talbot | 84 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2015Severe Thunderstorm Warnings in Delaware, 2015Severe Thunderstorm Warnings in Maryland, 2015Every severe thunderstorm warning in 2015
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.