Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 12, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 24, 2012, 3:16 PM EDT for Bucks County, Lehigh County, Northampton County, Pennsylvania. It was in force for 59 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
- May 24, 2012, 3:16 PM EDT (19:16 UTC)
- Expired
- May 24, 2012, 4:15 PM EDT
- In force
- 59 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Bucks County, PA, Lehigh County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 122 km from the middle of the area, began a volume at 19:16 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 24, 3:28 PM EDT | TSTM WND DMG | Whitehall Twp, PA | LARGE TREE LIMBS DOWN AND ONE TREE DOWN IN THE WHITEHALL... SOUTH WHITEHALL AND CATASAUQUA AREA OF LEHIGH COUNTY. |
| May 24, 3:30 PM EDT | HAIL 0.75 | Emmaus, PA |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 7.3 hours before the alert went out and 144 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
- 302 J/kg
- Mixed-layer CIN
- -16 J/kg
- Mixed-layer LCL
- 499 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- -11 m²/s²
- 0-3 km storm-relative helicity
- 6 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
657
WUUS51 KPHI 241916
SVRPHI
PAC017-077-095-242015-
/O.NEW.KPHI.SV.W.0012.120524T1916Z-120524T2015Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
316 PM EDT THU MAY 24 2012
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
LEHIGH COUNTY IN EASTERN PENNSYLVANIA...
THIS INCLUDES THE CITY OF ALLENTOWN...
SOUTHWESTERN NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA...
NORTHWESTERN BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA...
* UNTIL 415 PM EDT
* AT 312 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS TO 60 MPH. THIS STORM WAS LOCATED 7 MILES
SOUTH OF PLEASANT VALLEY...OR 15 MILES SOUTHEAST OF ALLENTOWN...AND
MOVING NORTHWEST AT 30 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
PLEASANT VALLEY AROUND 325 PM EDT...
EMMAUS AND HELLERTOWN AROUND 335 PM EDT...
EMMAUS AROUND 340 PM EDT...
ALLENTOWN AND BETHLEHEM AROUND 345 PM EDT...
NORTHAMPTON AND COFFEETOWN AROUND 355 PM EDT...
NEFFS AND BEERSVILLE AROUND 405 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.
PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.
&&
LAT...LON 4082 7541 4077 7537 4055 7520 4039 7543
4039 7544 4046 7556 4071 7581 4078 7568
4079 7560 4081 7554 4082 7543
TIME...MOT...LOC 1915Z 150DEG 24KT 4043 7534
$$
TFG2 follow-up statements
717
WWUS51 KPHI 241944
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
344 PM EDT THU MAY 24 2012
PAC017-241953-
/O.CAN.KPHI.SV.W.0012.000000T0000Z-120524T2015Z/
BUCKS PA-
344 PM EDT THU MAY 24 2012
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN BUCKS COUNTY IS
CANCELLED...
THE SEVERE THUNDERSTORM MOVED NORTH OF THE COUNTY. DO NOT DRIVE
AROUND BARRICADES.
PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.
LAT...LON 4061 7525 4049 7550 4048 7558 4071 7581
4076 7570 4078 7568 4078 7563 4081 7554
4081 7550 4082 7541
TIME...MOT...LOC 1943Z 150DEG 24KT 4050 7556 4067 7530
$$
PAC077-095-242015-
/O.CON.KPHI.SV.W.0012.000000T0000Z-120524T2015Z/
LEHIGH PA-NORTHAMPTON PA-
344 PM EDT THU MAY 24 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM EDT
FOR SOUTHWESTERN NORTHAMPTON AND LEHIGH COUNTIES...
AT 342 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER
SIZE HAIL...AND DAMAGING WINDS TO 60 MPH. THESE STORMS
WERE LOCATED ALONG A LINE EXTENDING FROM MACUNGIE TO FREEMANSBURG...
OR ALONG A LINE EXTENDING FROM 7 MILES SOUTHWEST OF ALLENTOWN TO
EASTON...MOVING NORTHWEST AT 30 MPH.
SEVERE THUNDERSTORMS WILL BE NEAR...
ANCIENT OAKS AND ALLENTOWN BY 350 PM EDT...
NORTH CATASAUQUA...HOKENDAUQUA...FULLERTON AND CATASAUQUA BY 355 PM
EDT...
COFFEETOWN...NORTHAMPTON...COPLAY AND CHAPMAN BY 400 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS STORM HAS A HISTORY OF PRODUCING DESTRUCTIVE WINDS AND LARGE
DAMAGING HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY
AWAY FROM WINDOWS!
PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.
&&
LAT...LON 4061 7525 4049 7550 4048 7558 4071 7581
4076 7570 4078 7568 4078 7563 4081 7554
4081 7550 4082 7541
TIME...MOT...LOC 1943Z 150DEG 24KT 4050 7556 4067 7530
$$
TFG252
WWUS51 KPHI 242004
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
404 PM EDT THU MAY 24 2012
PAC077-095-242015-
/O.CON.KPHI.SV.W.0012.000000T0000Z-120524T2015Z/
LEHIGH PA-NORTHAMPTON PA-
404 PM EDT THU MAY 24 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM EDT
FOR WEST CENTRAL NORTHAMPTON AND LEHIGH COUNTIES...
AT 359 PM EDT...A LINE OF SEVERE THUNDERSTORMS WAS REPORTED CAPABLE
OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS TO 60
MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM
CLAUSSVILLE TO CHAPMAN...OR ALONG A LINE EXTENDING FROM 9 MILES WEST
OF ALLENTOWN TO 10 MILES NORTHWEST OF EASTON...MOVING NORTHWEST AT 30
MPH.
SEVERE THUNDERSTORMS WILL BE NEAR...
NEFFS AND SCHNECKSVILLE BY 410 PM EDT...
SLATINGTON...EMERALD...NEW TRIPOLI AND JORDAN VALLEY BY 415 PM
EDT...
IF YOU SEE THREATENING WEATHER, PLEASE SEEK SHELTER IMMEDIATELY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.
&&
LAT...LON 4081 7540 4074 7535 4054 7564 4071 7581
4073 7577 4073 7575 4078 7568 4078 7562
4081 7554 4082 7544
TIME...MOT...LOC 2003Z 150DEG 24KT 4060 7567 4078 7541
$$
TFGThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 24, 1:47 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 43 min |
| May 24, 1:57 PM EDT | Special Weather Statement | PHI | Delaware, Philadelphia | 63 min |
| May 24, 2:01 PM EDT | Areal Flood Advisory | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 83 min |
| May 24, 2:08 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery | 52 min |
| May 24, 2:21 PM EDT | Areal Flood Advisory | PHI | Bucks, Montgomery | 97 min |
| May 24, 2:26 PM EDT | Special Weather Statement | PHI | Delaware, Montgomery | 64 min |
| May 24, 2:32 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 29 min |
| May 24, 2:36 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery | 54 min |
| May 24, 3:09 PM EDT | Special Weather Statement | PHI | Berks, Lehigh | 66 min |
| May 24, 3:13 PM EDT | Areal Flood Advisory | PHI | Bucks, Lehigh, Northampton | 91 min |
| May 24, 3:38 PM EDT | Special Weather Statement | PHI | Northampton | 67 min |
| May 24, 3:39 PM EDT | Areal Flood Advisory | PHI | Berks, Montgomery | 57 min |
| May 24, 4:00 PM EDT | Areal Flood Advisory | PHI | Carbon, Monroe | 67 min |
| May 24, 4:07 PM EDT | Special Weather Statement | PHI | Carbon, Monroe | 83 min |
| May 24, 4:23 PM EDT | Special Weather Statement | PHI | Monroe | 97 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2012Every severe thunderstorm warning in 2012
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.