Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2013
Severe Thunderstorm Warning 111, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Oct 7, 2013, 1:05 PM EDT for New Castle County, Delaware; Chester County, Delaware County, Pennsylvania; Cecil County, Maryland. It was in force for 25 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
- Oct 7, 2013, 1:05 PM EDT (17:05 UTC)
- Expired
- Oct 7, 2013, 1:30 PM EDT
- In force
- 25 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), 111 km from the middle of the area, began a volume at 17:05 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 |
|---|---|---|---|
| Oct 7, 1:10 PM EDT | TSTM WND DMG | North East, MD | TREE TOPS SNAPPED ON HILLCREST LANE. TIME OF EVENT ESTIMATED FROM RADAR. |
| Oct 7, 1:10 PM EDT | TSTM WND DMG | Northeast Heights, MD | DAMAGE TO CROPS |
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 |
|---|---|---|---|
| Oct 7, 8:56 AM EDT | Tornado Watch | SPC | 8 hr |
The nearest sounding before it
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 5.1 hours before the alert went out and 49 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
- 114 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 584 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 149 m²/s²
- 0-3 km storm-relative helicity
- 196 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
141 WUUS51 KPHI 071705 SVRPHI DEC003-MDC015-PAC029-045-071730- /O.NEW.KPHI.SV.W.0111.131007T1705Z-131007T1730Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 105 PM EDT MON OCT 7 2013 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHWESTERN DELAWARE COUNTY IN SOUTHEAST PENNSYLVANIA... NORTHERN NEW CASTLE COUNTY IN NORTHERN DELAWARE... NORTHERN CECIL COUNTY IN NORTHEAST MARYLAND... SOUTHERN CHESTER COUNTY IN SOUTHEAST PENNSYLVANIA... * UNTIL 130 PM EDT * AT 104 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM. THE STORM WAS NEAR BAY VIEW...MOVING NORTHEAST AT 55 MPH. THIS STORM IS CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... FAIR HILL AND PLEASANT HILL AROUND 110 PM EDT... KEMBLESVILLE AND GLEN WESTOVER AROUND 115 PM EDT... LADENBERG AND NORTH STAR AROUND 120 PM EDT... KENNETT SQUARE AND HOCKESSIN AROUND 125 PM EDT... ELAM AND WESTTOWN AROUND 130 PM EDT... PRECAUTIONARY/PREPAREDNESS ACTIONS... A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY INSIDE A STRONG BUILDING...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM. DOPPLER RADAR HAS INDICATED SOME ROTATION WITHIN THIS STORM. WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM ON THE LOWEST FLOOR. A TORNADO WATCH REMAINS IN EFFECT UNTIL 500 PM EDT MONDAY AFTERNOON FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY AND EASTERN PENNSYLVANIA. && LAT...LON 3995 7558 3987 7537 3952 7597 3972 7616 TIME...MOT...LOC 1705Z 226DEG 47KT 3965 7597 $$ SZATKOWSKI
1 follow-up statement
802 WWUS51 KPHI 071721 SVSPHI SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 121 PM EDT MON OCT 7 2013 DEC003-MDC015-PAC029-045-071730- /O.CON.KPHI.SV.W.0111.000000T0000Z-131007T1730Z/ DELAWARE PA-NEW CASTLE DE-CECIL MD-CHESTER PA- 121 PM EDT MON OCT 7 2013 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 130 PM EDT FOR SOUTHERN CHESTER...NORTHEASTERN CECIL...NORTHERN NEW CASTLE AND SOUTHWESTERN DELAWARE COUNTIES... AT 118 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM AVONDALE TO CHERRY HILL...MOVING NORTHEAST AT 60 MPH. SEVERE THUNDERSTORMS WILL BE NEAR... ASHLAND AND WESTTOWN AROUND 130 PM EDT... PRECAUTIONARY/PREPAREDNESS ACTIONS... A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM. DOPPLER RADAR HAS INDICATED SOME ROTATION WITHIN THIS STORM. WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY DEVELOP. IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM. && LAT...LON 3995 7558 3987 7537 3957 7592 3980 7594 TIME...MOT...LOC 1721Z 227DEG 54KT 3989 7574 3964 7581 $$ FORECASTER:DRAG
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 7, 12:41 PM EDT | Special Weather Statement | PHI | New Castle | 64 min |
| Oct 7, 1:37 PM EDT | Special Weather Statement | PHI | Kent, New Castle | 53 min |
| Oct 7, 2:18 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 57 min |
| Oct 7, 3:21 PM EDT | Special Weather Statement | PHI | Sussex | 39 min |
| Oct 7, 11:31 AM EDT | Special Weather Statement | PHI | Berks, Chester | 59 min |
| Oct 7, 11:50 AM EDT | Severe Thunderstorm Warning | PHI | Berks | 40 min |
| Oct 7, 12:12 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Carbon, Lehigh, Monroe, Northampton | 63 min |
| Oct 7, 12:49 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Montgomery | 41 min |
| Oct 7, 1:30 PM EDT | Special Weather Statement | PHI | Monroe, Northampton | 60 min |
| Oct 7, 1:33 PM EDT | Special Weather Statement | PHI | Bucks, Montgomery | 42 min |
| Oct 7, 1:59 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 46 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2013Severe Thunderstorm Warnings in Delaware, 2013Severe Thunderstorm Warnings in Maryland, 2013Every severe thunderstorm warning in 2013
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.