Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2015
Severe Thunderstorm Warning 20, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 31, 2015, 4:33 PM EDT for Monroe County, Northampton County, Pennsylvania; Warren County, New Jersey. It was in force for 42 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
- May 31, 2015, 4:33 PM EDT (20:33 UTC)
- Expired
- May 31, 2015, 5:15 PM EDT
- In force
- 42 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Warren County, NJ, Monroe County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 141 km from the middle of the area, began a volume at 20:33 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 |
|---|---|---|---|
| May 31, 4:40 PM EDT | TSTM WND DMG | 1 Ssw Hamilton Square, PA | LIMBS DOWN ON LINES |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 8.6 hours before the alert went out and 191 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
- 106 J/kg
- Mixed-layer CIN
- -105 J/kg
- Mixed-layer LCL
- 746 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- 41 m²/s²
- 0-3 km storm-relative helicity
- 41 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
337
WUUS51 KPHI 312033
SVRPHI
NJC041-PAC089-095-312115-
/O.NEW.KPHI.SV.W.0020.150531T2033Z-150531T2115Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
433 PM EDT SUN MAY 31 2015
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHWESTERN WARREN COUNTY IN NORTHWESTERN NEW JERSEY...
EASTERN MONROE COUNTY IN NORTHEASTERN PENNSYLVANIA...
NORTHEASTERN NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA...
* UNTIL 515 PM EDT
* AT 432 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM
WAS LOCATED OVER PEN ARGYL...OR 14 MILES NORTH OF EASTON...AND
MOVING NORTHEAST AT 30 MPH. PENNY SIZE HAIL MAY ALSO ACCOMPANY THE
DAMAGING WINDS.
* THIS SEVERE THUNDERSTORM WILL BE NEAR...
COLUMBIA AROUND 445 PM EDT.
EAST STROUDSBURG...DELAWARE WATER GAP...DELAWARE WATER GAP AND
ANALOMINK AROUND 450 PM EDT.
HERNYVILLE AROUND 455 PM EDT.
ALPINE MOUNTAIN AROUND 500 PM EDT.
ECHO LAKE AND WERRY LAKE AROUND 505 PM EDT.
MILLBROOK AROUND 510 PM EDT.
OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE
BARTONSVILLE...HIDDEN LAKE...STROUDSBURG...SHAWNEE...MARSHALLS
CREEK...ROSETO...ARLINGTON HEIGHTS AND PORTLAND.
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 THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.
&&
LAT...LON 4115 7515 4114 7513 4114 7509 4108 7503
4110 7497 4104 7491 4082 7525 4089 7539
4123 7515 4124 7513
TIME...MOT...LOC 2032Z 215DEG 25KT 4090 7526
$$1 follow-up statement
760
WWUS51 KPHI 312058
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
458 PM EDT SUN MAY 31 2015
NJC041-PAC095-312106-
/O.CAN.KPHI.SV.W.0020.000000T0000Z-150531T2115Z/
WARREN NJ-NORTHAMPTON PA-
458 PM EDT SUN MAY 31 2015
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN WARREN AND
NORTHEASTERN NORTHAMPTON COUNTIES IS CANCELLED...
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF
NORTHAMPTON COUNTY AND SHOULD STAY OUT OF WESTERN WARREN COUNTY.
LAT...LON 4108 7503 4109 7497 4106 7502 4104 7503
4099 7513 4097 7514 4097 7512 4095 7515
4093 7522 4090 7523 4086 7530 4091 7538
4115 7520
TIME...MOT...LOC 2056Z 207DEG 12KT 4097 7522
$$
PAC089-312115-
/O.CON.KPHI.SV.W.0020.000000T0000Z-150531T2115Z/
MONROE PA-
458 PM EDT SUN MAY 31 2015
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR SOUTHEASTERN MONROE COUNTY...
AT 456 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
CAPABLE OF PRODUCING DAMAGING WINDS TO 60 MPH. THIS STORM WAS
LOCATED OVER STORMVILLE...OR 12 MILES SOUTHEAST OF MOUNT POCONO...
MOVING NORTHEAST AT 15 MPH.
THIS SEVERE STORM WILL BE NEAR...
DELAWARE WATER GAP AROUND 505 PM EDT.
DELAWARE WATER GAP AROUND 510 PM EDT.
EAST STROUDSBURG...ANALOMINK...HERNYVILLE...ALPINE MOUNTAIN AND
ECHO LAKE AROUND 515 PM EDT.
OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE
BARTONSVILLE...HIDDEN LAKE...STROUDSBURG...SHAWNEE...MARSHALLS CREEK
AND ARLINGTON HEIGHTS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...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.
HEAVY RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.
&&
LAT...LON 4108 7503 4109 7497 4106 7502 4104 7503
4099 7513 4097 7514 4097 7512 4095 7515
4093 7522 4090 7523 4086 7530 4091 7538
4115 7520
TIME...MOT...LOC 2056Z 207DEG 12KT 4097 7522
$$The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 30, 8:19 PM EDT | Special Weather Statement | PHI | Carbon | 56 min |
| May 30, 8:46 PM EDT | Special Weather Statement | PHI | Lebanon | 29 min |
| May 30, 9:03 PM EDT | Areal Flood Advisory | PHI | Berks | 3 hr |
| May 30, 9:11 PM EDT | Special Weather Statement | PHI | Lebanon | 64 min |
| May 30, 9:20 PM EDT | Special Weather Statement | PHI | Carbon | 55 min |
| May 30, 9:36 PM EDT | Areal Flood Advisory | PHI | Carbon | 3 hr |
| May 31, 1:00 PM EDT | Severe Thunderstorm Warning | PHI | Northampton | 45 min |
| May 31, 1:11 PM EDT | Flash Flood Watch | PHI | Berks, Bucks, Carbon, Lehigh, Monroe, Northampton | 13 hr |
| May 31, 5:12 PM EDT | Severe Thunderstorm Warning | PHI | Monroe | 63 min |
| May 31, 5:23 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 37 min |
| May 31, 5:42 PM EDT | Flash Flood Warning | PHI | Carbon, Monroe | 6 hr |
| May 31, 7:08 PM EDT | Special Weather Statement | PHI | Lehigh | 82 min |
| May 31, 7:27 PM EDT | Areal Flood Advisory | PHI | Berks, Lehigh | 5 hr |
| May 31, 7:46 PM EDT | Flash Flood Warning | PHI | Berks, Lehigh | 4 hr |
| May 31, 7:48 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 35 min |
| May 31, 7:57 PM EDT | Areal Flood Advisory | PHI | Lehigh, Northampton | 6 hr |
| May 31, 1:24 PM EDT | Special Weather Statement | PHI | Monmouth | 36 min |
| May 31, 2:00 PM EDT | Special Weather Statement | PHI | Monmouth | 45 min |
| May 31, 5:57 PM EDT | Small Craft Advisory | PHI | 6 hr | |
| May 31, 6:11 PM EDT | Areal Flood Advisory | PHI | Middlesex, Somerset | 3 hr |
| May 31, 6:37 PM EDT | Flash Flood Warning | PHI | Middlesex | 5 hr |
| May 31, 6:50 PM EDT | Severe Thunderstorm Warning | PHI | Middlesex, Monmouth | 40 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.