Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2015
Severe Thunderstorm Warning 12, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 16, 2015, 7:04 PM EDT for 5 counties in Pennsylvania; Hunterdon County, Mercer County, Warren County, New Jersey. It was in force for 26 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
- May 16, 2015, 7:04 PM EDT (23:04 UTC)
- Expired
- May 16, 2015, 7:30 PM EDT
- In force
- 26 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Hunterdon County, NJ, Mercer County, NJ, Warren County, NJ, Berks County, PA, Bucks County, PA, Lehigh County, PA, Montgomery County, PA, Northampton County, PA
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 11.1 hours before the alert went out and 213 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
- 903 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 91 m²/s²
- 0-3 km storm-relative helicity
- 170 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
400 WUUS51 KPHI 162304 SVRPHI NJC019-021-041-PAC011-017-077-091-095-162345- /O.NEW.KPHI.SV.W.0012.150516T2304Z-150516T2345Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 704 PM EDT SAT MAY 16 2015 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHWESTERN WARREN COUNTY IN NORTHWESTERN NEW JERSEY... SOUTHWESTERN HUNTERDON COUNTY IN NORTHWESTERN NEW JERSEY... NORTHWESTERN MERCER COUNTY IN CENTRAL NEW JERSEY... SOUTHEASTERN LEHIGH COUNTY IN EASTERN PENNSYLVANIA... NORTHWESTERN MONTGOMERY COUNTY IN SOUTHEASTERN PENNSYLVANIA... BUCKS COUNTY IN SOUTHEASTERN PENNSYLVANIA... SOUTHEASTERN NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA... EAST CENTRAL BERKS COUNTY IN EASTERN PENNSYLVANIA... * UNTIL 745 PM EDT * AT 703 PM EDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE THUNDERSTORM PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED OVER GREEN LANE...OR 16 MILES SOUTH OF ALLENTOWN...AND MOVING NORTHEAST AT 35 MPH. * LOCATIONS IMPACTED INCLUDE... EASTON...BETHLEHEM...LANSDALE...FORKS...EMMAUS...QUAKERTOWN... PERKASIE...DOYLESTOWN...BYRAM...WILSON...SOUDERTON...BEDMINSTER... HELLERTOWN...COLLEGEVILLE...CHALFONT...TINICUM...TRAPPE... HATFIELD...EAST GREENVILLE AND NEW HOPE. PRECAUTIONARY/PREPAREDNESS ACTIONS... TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD TO POOR DRAINAGE FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS. && LAT...LON 4019 7547 4044 7562 4076 7516 4032 7481 TIME...MOT...LOC 2303Z 244DEG 30KT 4036 7542 $$ SFJ
2 follow-up statements
428
WWUS51 KPHI 162319
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
719 PM EDT SAT MAY 16 2015
PAC011-162328-
/O.CAN.KPHI.SV.W.0012.000000T0000Z-150516T2345Z/
BERKS PA-
719 PM EDT SAT MAY 16 2015
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL BERKS COUNTY IS
CANCELLED...
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF
THE WARNED AREA. THEREFORE THE WARNING HAS BEEN CANCELLED.
LAT...LON 4021 7536 4049 7555 4076 7516 4032 7481
TIME...MOT...LOC 2318Z 244DEG 30KT 4042 7527
$$
NJC019-021-041-PAC017-077-091-095-162345-
/O.CON.KPHI.SV.W.0012.000000T0000Z-150516T2345Z/
WARREN NJ-HUNTERDON NJ-MERCER NJ-LEHIGH PA-MONTGOMERY PA-BUCKS PA-
NORTHAMPTON PA-
719 PM EDT SAT MAY 16 2015
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM EDT
FOR SOUTHWESTERN WARREN...SOUTHWESTERN HUNTERDON...NORTHWESTERN
MERCER...SOUTHEASTERN LEHIGH...NORTH CENTRAL MONTGOMERY...BUCKS AND
SOUTHEASTERN NORTHAMPTON COUNTIES...
AT 718 PM EDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE
THUNDERSTORM PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM
WAS LOCATED NEAR PERKASIE...OR 16 MILES SOUTHEAST OF ALLENTOWN...
MOVING NORTHEAST AT 35 MPH. NICKEL SIZE HAIL MAY ALSO ACCOMPANY THE
DAMAGING WINDS.
LOCATIONS IMPACTED INCLUDE...
EASTON...BETHLEHEM...LANSDALE...FORKS...EMMAUS...QUAKERTOWN...
PERKASIE...DOYLESTOWN...BYRAM...WILSON...SOUDERTON...BEDMINSTER...
HELLERTOWN...CHALFONT...TINICUM...HATFIELD...NEW HOPE...ALPHA...
DUBLIN AND FERNDALE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.
&&
LAT...LON 4021 7536 4049 7555 4076 7516 4032 7481
TIME...MOT...LOC 2318Z 244DEG 30KT 4042 7527
$$
SFJ080
WWUS51 KPHI 162330
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
730 PM EDT SAT MAY 16 2015
NJC019-021-041-PAC017-077-091-095-162339-
/O.CAN.KPHI.SV.W.0012.000000T0000Z-150516T2345Z/
WARREN NJ-HUNTERDON NJ-MERCER NJ-LEHIGH PA-MONTGOMERY PA-BUCKS PA-
NORTHAMPTON PA-
730 PM EDT SAT MAY 16 2015
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN WARREN...
SOUTHWESTERN HUNTERDON...NORTHWESTERN MERCER...SOUTHEASTERN LEHIGH...
NORTH CENTRAL MONTGOMERY...BUCKS AND SOUTHEASTERN NORTHAMPTON
COUNTIES IS CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR
PROPERTY. THEREFORE THE WARNING HAS BEEN CANCELLED. HOWEVER GUSTY
WINDS TO 40 MPH ARE STILL POSSIBLE WITH THIS THUNDERSTORM.
LAT...LON 4021 7536 4049 7555 4076 7516 4032 7481
TIME...MOT...LOC 2328Z 244DEG 30KT 4046 7516
$$
SFJThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 16, 4:46 PM EDT | Special Weather Statement | PHI | Pike | 44 min |
| May 16, 4:55 PM EDT | Special Weather Statement | PHI | Lehigh | 35 min |
| May 16, 5:09 PM EDT | Special Weather Statement | PHI | Berks, Chester | 66 min |
| May 16, 5:26 PM EDT | Severe Thunderstorm Warning | PHI | Monroe | 49 min |
| May 16, 5:36 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Lehigh, Montgomery, Northampton | 39 min |
| May 16, 5:57 PM EDT | Special Weather Statement | PHI | Berks, Chester, Lehigh, Montgomery | 63 min |
| May 16, 6:03 PM EDT | Areal Flood Advisory | PHI | Monroe | 3 hr |
| May 16, 6:16 PM EDT | Special Weather Statement | PHI | Lehigh | 44 min |
| May 16, 6:31 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Chester, Lehigh, Montgomery | 44 min |
| May 16, 6:45 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 45 min |
| May 16, 6:55 PM EDT | Areal Flood Advisory | PHI | Monroe, Northampton | 3 hr |
| May 16, 6:58 PM EDT | Special Weather Statement | PHI | Monroe | 62 min |
| May 16, 7:34 PM EDT | Special Weather Statement | PHI | Bucks | 41 min |
| May 16, 7:35 PM EDT | Special Weather Statement | PHI | Delaware | 40 min |
| May 16, 6:10 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Morris, Somerset, Sussex, Warren | 50 min |
| May 16, 6:53 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Morris, Somerset | 37 min |
| May 16, 7:15 PM EDT | Tornado Warning | PHI | Morris, Somerset | 11 min |
| May 16, 7:28 PM EDT | Severe Thunderstorm Warning | PHI | Middlesex, Morris, Somerset | 28 min |
| May 16, 7:37 PM EDT | Special Weather Statement | PHI | Sussex | 23 min |
| May 16, 7:57 PM EDT | Areal Flood Advisory | PHI | Hunterdon, Middlesex, Monmouth, Morris, Somerset, Sussex | 3 hr |
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; the sounding from the Mesonet's radiosonde archive.