Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2015
Severe Thunderstorm Warning 41, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 12, 2015, 6:53 PM EDT for Lehigh County, Northampton County, Pennsylvania. It was in force for 52 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
- Jun 12, 2015, 6:53 PM EDT (22:53 UTC)
- Expired
- Jun 12, 2015, 7:45 PM EDT
- In force
- 52 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Lehigh County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 115 km from the middle of the area, began a volume at 22:55 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.
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 10.9 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
- 2083 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 42 m²/s²
- 0-3 km storm-relative helicity
- 67 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
003
WUUS51 KPHI 122253
SVRPHI
PAC077-095-122345-
/O.NEW.KPHI.SV.W.0041.150612T2253Z-150612T2345Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
653 PM EDT FRI JUN 12 2015
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHWESTERN NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA...
LEHIGH COUNTY IN EASTERN PENNSYLVANIA...
* UNTIL 745 PM EDT
* AT 653 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM
WAS LOCATED NEAR ALLENTOWN...AND MOVING NORTHEAST AT 35 MPH.
* LOCATIONS IMPACTED INCLUDE...
ALLENTOWN...EASTON...BETHLEHEM...EMMAUS...NORTHAMPTON...WILSON...
HELLERTOWN...NAZARETH...BATH...WEST EASTON...RIEGELSVILLE...
STEUBEN...GLENDON...BEERSVILLE...ZIONSVILLE...CLAUSSVILLE...
SCHNECKSVILLE...LEHIGH UNIVERSITY...NEFFS AND OLD ORCHARD.
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.
&&
LAT...LON 4083 7539 4084 7536 4084 7535 4062 7520
4060 7520 4058 7527 4054 7532 4044 7552
4061 7577
TIME...MOT...LOC 2253Z 223DEG 41KT 4060 7553
$$
JJMThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 11, 8:57 PM EDT | Special Weather Statement | PHI | Schuylkill | 48 min |
| Jun 11, 9:23 PM EDT | Special Weather Statement | PHI | Lehigh, Northampton | 52 min |
| Jun 11, 9:33 PM EDT | Special Weather Statement | PHI | Berks | 27 min |
| Jun 11, 9:41 PM EDT | Areal Flood Advisory | PHI | Lehigh, Northampton | 4 hr |
| Jun 11, 9:54 PM EDT | Special Weather Statement | PHI | Berks | 51 min |
| Jun 12, 4:38 PM EDT | Special Weather Statement | PHI | Montgomery | 52 min |
| Jun 12, 4:57 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Montgomery | 48 min |
| Jun 12, 5:07 PM EDT | Severe Thunderstorm Warning | PHI | Lehigh, Northampton | 38 min |
| Jun 12, 5:41 PM EDT | Severe Thunderstorm Warning | PHI | Northampton | 49 min |
| Jun 12, 6:13 PM EDT | Severe Thunderstorm Warning | PHI | Monroe, Northampton | 28 min |
| Jun 12, 7:27 PM EDT | Severe Thunderstorm Warning | PHI | Northampton | 33 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 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; radar from the NEXRAD Level II archive.