Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 211, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Sep 7, 2012, 3:39 AM EDT for Berks County, Pennsylvania. It was in force for 81 min. 4 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
- Sep 7, 2012, 3:39 AM EDT (07:39 UTC)
- Expired
- Sep 7, 2012, 5:00 AM EDT
- In force
- 81 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
County Berks County, PA
The radar
The Philadelphia radar (KDIX), 158 km from the middle of the area, began a volume at 07:38 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 |
|---|---|---|---|
| Sep 7, 3:44 AM EDT | TSTM WND DMG | Tulpehocken Twp, PA | WIRES DOWN ACROSS DECK ROAD IN TULPEHOCKEN TWP. |
| Sep 7, 3:58 AM EDT | TSTM WND DMG | Womelsdorf, PA | TREE DOWN ALONG NORTH WATER STREET IN WOMELSDORF. |
| Sep 7, 4:17 AM EDT | HAIL 0.88 | Wernersville, PA | |
| Sep 7, 4:23 AM EDT | HAIL 0.25 | Wernersville, PA | ONE QUARTER TO THREE EIGHTHS DIAMETER HAIL. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 00:00Z, 7.7 hours before the alert went out and 193 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
- 1253 J/kg
- Mixed-layer CIN
- -47 J/kg
- Mixed-layer LCL
- 898 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 78 m²/s²
- 0-3 km storm-relative helicity
- 104 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.9
The text
As transmitted, in the capitals the NWS used until 2016.
672
WUUS51 KPHI 070739
SVRPHI
PAC011-070900-
/O.NEW.KPHI.SV.W.0211.120907T0739Z-120907T0900Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
339 AM EDT FRI SEP 7 2012
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHERN BERKS COUNTY IN EASTERN PENNSYLVANIA...
THIS INCLUDES THE CITY OF READING...
* UNTIL 500 AM EDT
* AT 338 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 6 MILES
SOUTHWEST OF STRAUSSTOWN...OR 19 MILES NORTHWEST OF READING...AND
MOVING SOUTHEAST AT 15 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
STRAUSSTOWN AROUND 345 AM EDT...
WOMELSDORF AROUND 400 AM EDT...
BERNVILLE AROUND 410 AM EDT...
WERNERSVILLE AROUND 425 AM EDT...
SINKING SPRING AROUND 435 AM EDT...
WYOMISSING AROUND 445 AM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...LARGE HAIL...AND DEADLY CLOUD TO
GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.
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.
IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...HEAVY RAIN WILL OCCUR
WITH THESE STORMS AND CAUSE LOW-LYING AND POOR DRAINAGE FLOODING.
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 4052 7634 4052 7628 4053 7623 4037 7563
4014 7589 4029 7613 4036 7621 4038 7626
4046 7638
TIME...MOT...LOC 0740Z 295DEG 13KT 4044 7626
$$
TFG1 follow-up statement
620
WWUS51 KPHI 070823
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
423 AM EDT FRI SEP 7 2012
PAC011-070900-
/O.CON.KPHI.SV.W.0211.000000T0000Z-120907T0900Z/
BERKS PA-
423 AM EDT FRI SEP 7 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 AM EDT
FOR SOUTHERN BERKS COUNTY...
AT 420 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS
LOCATED NEAR WERNERSVILLE...OR 8 MILES WEST OF READING...MOVING
SOUTHEAST AT 25 MPH.
THE SEVERE THUNDERSTORM WILL BE NEAR...
MOHNTON...SHILLINGTON...WYOMISSING AND WEST READING BY 430 AM
EDT...
KENHORST AND 6 MILES SOUTHWEST OF READING BY 435 AM EDT...
FLYING HILLS BY 440 AM EDT...
NEW MORGAN AND BIRDSBORO BY 455 AM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...FREQUENT CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE
ENOUGH TO BE STRUCK BY LIGHTNING.
PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.
&&
LAT...LON 4037 7618 4038 7615 4040 7614 4044 7611
4049 7607 4037 7563 4014 7589 4029 7613
4035 7620
TIME...MOT...LOC 0823Z 305DEG 21KT 4030 7606
$$The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 6, 9:01 PM EDT | Special Weather Statement | PHI | Monroe | 89 min |
| Sep 6, 10:31 PM EDT | Special Weather Statement | PHI | Carbon | 119 min |
| Sep 6, 11:12 PM EDT | Severe Thunderstorm Warning | PHI | Carbon | 65 min |
| Sep 7, 1:57 AM EDT | Special Weather Statement | PHI | Berks | 2 hr |
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.