Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 111, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 30, 2009, 1:15 PM EDT for Berks County, Pennsylvania. It was in force for 75 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
- Jun 30, 2009, 1:15 PM EDT (17:15 UTC)
- Expired
- Jun 30, 2009, 2:30 PM EDT
- In force
- 75 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
County Berks County, PA
The radar
The Philadelphia radar (KDIX), 162 km from the middle of the area, began a volume at 17:17 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 |
|---|---|---|---|
| Jun 30, 2:00 PM EDT | TSTM WND DMG | 17 Nw Reading, PA | TREES DOWN IN UPPER BERN AND UPPER TULPEHOCKEN |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 30, 11:37 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 5.3 hours before the alert went out and 117 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
- 161 J/kg
- Mixed-layer CIN
- -86 J/kg
- Mixed-layer LCL
- 1704 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 53 m²/s²
- 0-3 km storm-relative helicity
- 95 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
The text
As transmitted, in the capitals the NWS used until 2016.
000
WUUS51 KPHI 301715
SVRPHI
PAC011-301830-
/O.NEW.KPHI.SV.W.0111.090630T1715Z-090630T1830Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
115 PM EDT TUE JUN 30 2009
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHWESTERN BERKS COUNTY IN EASTERN PENNSYLVANIA...
* UNTIL 230 PM EDT
* AT 114 PM 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 18
MILES WEST OF WOMELSDORF...OR 27 MILES NORTHWEST OF LANCASTER...AND
MOVING NORTHEAST AT 25 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
STRAUSSTOWN AND 7 MILES NORTHWEST OF BERNVILLE AROUND 200 PM EDT...
HAMBURG AROUND 225 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY LIGHTNING IS ONE OF NATURES GREATEST KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM EDT
TUESDAY EVENING FOR NORTHWESTERN NEW JERSEY AND EASTERN PENNSYLVANIA.
&&
LAT...LON 4053 7634 4052 7630 4054 7618 4056 7615
4058 7609 4060 7605 4059 7603 4064 7601
4066 7596 4035 7583 4034 7619 4039 7629
4050 7644
TIME...MOT...LOC 1715Z 243DEG 23KT 4040 7653
$$
TFG1 follow-up statement
000
WWUS51 KPHI 301755
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
155 PM EDT TUE JUN 30 2009
PAC011-301830-
/O.CON.KPHI.SV.W.0111.000000T0000Z-090630T1830Z/
BERKS PA-
155 PM EDT TUE JUN 30 2009
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 PM EDT
FOR NORTHWESTERN BERKS COUNTY...
AT 153 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS
LOCATED NEAR STRAUSSTOWN...OR 18 MILES NORTHWEST OF READING...MOVING
EAST AT 25 MPH.
THE SEVERE THUNDERSTORM WILL BE NEAR...
STRAUSSTOWN BY 200 PM EDT...
BERNVILLE BY 205 PM EDT...
CENTERPORT...LEESPORT AND 7 MILES SOUTH OF PORT CLINTON BY 220 PM
EDT...
SHOEMAKERSVILLE...HAMBURG...6 MILES NORTH OF TEMPLE AND 8 MILES
NORTH OF LAURELDALE BY 225 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM EDT
TUESDAY EVENING FOR NORTHWESTERN NEW JERSEY AND EASTERN PENNSYLVANIA.
&&
LAT...LON 4039 7628 4042 7628 4047 7629 4051 7628
4054 7618 4056 7615 4058 7609 4060 7605
4059 7603 4064 7601 4066 7596 4035 7583
4034 7619
TIME...MOT...LOC 1755Z 260DEG 23KT 4046 7621
$$
TFGThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 30, 2:31 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Montgomery | 44 min |
| Jun 30, 2:51 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery | 54 min |
| Jun 30, 3:12 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 63 min |
| Jun 30, 3:13 PM EDT | Flash Flood Warning | PHI | Bucks, Montgomery | 114 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2009Every severe thunderstorm warning in 2009
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.