Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2015
Severe Thunderstorm Warning 91, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 9, 2015, 7:12 PM EDT for 4 counties in Pennsylvania; Hunterdon County, Warren County, New Jersey. It was in force for 48 min. 1 report 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
- Jul 9, 2015, 7:12 PM EDT (23:12 UTC)
- Expired
- Jul 9, 2015, 8:00 PM EDT
- In force
- 48 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Hunterdon County, NJ, Warren County, NJ, Berks County, PA, Bucks County, PA, Lehigh County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 129 km from the middle of the area, began a volume at 23:14 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 |
|---|---|---|---|
| Jul 9, 7:48 PM EDT | TSTM WND DMG | Center Valley, PA | DAMAGE TO THE GYM ROOF AND SCOREBOARDS AT DESALES UNIVERSITY |
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 |
|---|---|---|---|
| Jul 9, 4:57 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 11.2 hours before the alert went out and 225 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 757 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 30 m²/s²
- 0-3 km storm-relative helicity
- 129 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
265
WUUS51 KPHI 092312
SVRPHI
NJC019-041-PAC011-017-077-095-100000-
/O.NEW.KPHI.SV.W.0091.150709T2312Z-150710T0000Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
712 PM EDT THU JUL 9 2015
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
CENTRAL HUNTERDON COUNTY IN NORTHWESTERN NEW JERSEY...
SOUTHWESTERN WARREN COUNTY IN NORTHWESTERN NEW JERSEY...
NORTHWESTERN BUCKS COUNTY IN SOUTHEASTERN PENNSYLVANIA...
NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA...
NORTHEASTERN BERKS COUNTY IN EASTERN PENNSYLVANIA...
LEHIGH COUNTY IN EASTERN PENNSYLVANIA...
* UNTIL 800 PM EDT
* AT 711 PM EDT...DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS
CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS
WERE LOCATED OVER NEW TRIPOLI...OR 12 MILES SOUTH OF LEHIGHTON...AND
MOVING EAST AT 50 MPH.
* LOCATIONS IMPACTED INCLUDE...
ALLENTOWN...EASTON...BETHLEHEM...FORKS...EMMAUS...NORTHAMPTON...
WILSON...WASHINGTON...HELLERTOWN...NAZARETH...BANGOR...KUTZTOWN...
SLATINGTON...FLEETWOOD...HIGH BRIDGE...PEN ARGYL...WIND GAP...
CLINTON...BATH AND BELVIDERE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...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.
&&
LAT...LON 4070 7583 4078 7567 4078 7562 4081 7554
4083 7538 4085 7533 4092 7495 4056 7487
4039 7589 4067 7593
TIME...MOT...LOC 2311Z 259DEG 49KT 4065 7578
$$
GORSE/FRANCK1 follow-up statement
495
WWUS51 KPHI 092354
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
754 PM EDT THU JUL 9 2015
PAC011-100003-
/O.CAN.KPHI.SV.W.0091.000000T0000Z-150710T0000Z/
BERKS PA-
754 PM EDT THU JUL 9 2015
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN BERKS COUNTY IS
CANCELLED...
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF
THE WARNED AREA. THEREFORE THE WARNING HAS BEEN CANCELLED.
LAT...LON 4045 7550 4079 7557 4092 7495 4056 7487
TIME...MOT...LOC 2353Z 256DEG 39KT 4069 7514
$$
NJC019-041-PAC017-077-095-100000-
/O.CON.KPHI.SV.W.0091.000000T0000Z-150710T0000Z/
HUNTERDON NJ-WARREN NJ-BUCKS PA-NORTHAMPTON PA-LEHIGH PA-
754 PM EDT THU JUL 9 2015
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM EDT
FOR CENTRAL HUNTERDON...SOUTHWESTERN WARREN...NORTHWESTERN BUCKS...
NORTHAMPTON AND EASTERN LEHIGH COUNTIES...
AT 753 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE
OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS
LOCATED OVER ALPHA...OR NEAR EASTON...MOVING EAST AT 45 MPH.
LOCATIONS IMPACTED INCLUDE...
ALLENTOWN...EASTON...BETHLEHEM...FORKS...EMMAUS...NORTHAMPTON...
WILSON...WASHINGTON...HELLERTOWN...NAZARETH...BANGOR...HIGH BRIDGE...
PEN ARGYL...WIND GAP...CLINTON...BATH...BELVIDERE...HARMONY...OXFORD
AND ALPHA.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...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.
&&
LAT...LON 4045 7550 4079 7557 4092 7495 4056 7487
TIME...MOT...LOC 2353Z 256DEG 39KT 4069 7514
$$The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 9, 6:15 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Montgomery | 45 min |
| Jul 9, 6:35 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh | 40 min |
| Jul 9, 6:46 PM EDT | Areal Flood Advisory | PHI | Carbon, Lehigh, Monroe, Northampton | 4 hr |
| Jul 9, 6:50 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 40 min |
| Jul 9, 6:57 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Chester, Lehigh, Montgomery | 48 min |
| Jul 9, 7:21 PM EDT | Areal Flood Advisory | PHI | Berks, Lehigh | 4 hr |
| Jul 9, 7:29 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 46 min |
| Jul 9, 7:39 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 66 min |
| Jul 9, 7:55 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Philadelphia | 40 min |
| Jul 9, 7:56 PM EDT | Areal Flood Advisory | PHI | Bucks, Delaware, Montgomery, Philadelphia | 4 hr |
| Jul 9, 7:44 PM EDT | Special Marine Warning | PHI | 31 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2015Severe Thunderstorm Warnings in New Jersey, 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.