Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2008
Severe Thunderstorm Warning 207, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 2, 2008, 6:51 PM EDT for Berks County, Pennsylvania. It was in force for 54 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
- Aug 2, 2008, 6:51 PM EDT (22:51 UTC)
- Expired
- Aug 2, 2008, 7:45 PM EDT
- In force
- 54 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
County Berks County, PA
The radar
The Philadelphia radar (KDIX), 155 km from the middle of the area, began a volume at 22:52 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 |
|---|---|---|---|
| Aug 2, 7:20 PM EDT | HAIL 0.25 | Bernville, PA | 48 MPH WIND GUST |
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 |
|---|---|---|---|
| Aug 2, 10:39 AM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 10.9 hours before the alert went out and 204 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
- 17 J/kg
- Mixed-layer CIN
- -223 J/kg
- Mixed-layer LCL
- 1825 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 88 m²/s²
- 0-3 km storm-relative helicity
- 58 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WUUS51 KPHI 022251
SVRPHI
PAC011-022345-
/O.NEW.KPHI.SV.W.0207.080802T2251Z-080802T2345Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
651 PM EDT SAT AUG 2 2008
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
BERKS COUNTY IN EASTERN PENNSYLVANIA...
* UNTIL 745 PM EDT
* AT 648 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR
STRAUSSTOWN...OR ABOUT 20 MILES NORTHWEST OF READING...AND MOVING
SOUTHEAST AT 25 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
BERNVILLE BY 705 PM...
6 MILES NORTHEAST OF WOMELSDORF BY 710 PM...
WERNERSVILLE AND 6 MILES SOUTHWEST OF LEESPORT BY 720 PM...
READING BY 735 PM...
BIRDSBORO BY 745 PM...
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 NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM SATURDAY
EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY AND
SOUTHEASTERN PENNSYLVANIA.
LAT...LON 4052 7638 4053 7624 4054 7618 4056 7615
4058 7609 4059 7607 4059 7603 4064 7600
4044 7556 4014 7587 4014 7589 4051 7639
TIME...MOT...LOC 2251Z 314DEG 22KT 4050 7621
$$
JJM1 follow-up statement
000
WWUS51 KPHI 022340
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
740 PM EDT SAT AUG 2 2008
PAC011-022349-
/O.EXP.KPHI.SV.W.0207.000000T0000Z-080802T2345Z/
BERKS PA-
739 PM EDT SAT AUG 2 2008
...THE SEVERE THUNDERSTORM WARNING FOR BERKS COUNTY WILL EXPIRE AT
745 PM EDT...
THUNDERSTORMS MOVING THROUGH BERKS COUNTY ARE DECREASING IN
INTENSITY. THE SEVERE THUNDERSTORM WARNING WILL THEREFORE BE ALLOWED
TO EXPIRE AT 745 PM.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT
SATURDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW
JERSEY AND SOUTHEASTERN PENNSYLVANIA.
LAT...LON 4052 7638 4053 7624 4054 7618 4056 7615
4058 7609 4059 7607 4059 7603 4064 7600
4044 7556 4014 7587 4014 7589 4051 7639
TIME...MOT...LOC 2339Z 314DEG 22KT 4030 7593
$$
JJMThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 2, 10:29 AM EDT | Severe Thunderstorm Warning | PHI | Carbon, Lehigh, Monroe, Northampton | 44 min |
| Aug 2, 5:50 PM EDT | Severe Thunderstorm Warning | PHI | Monroe, Northampton | 55 min |
| Aug 2, 6:19 PM EDT | Severe Thunderstorm Warning | PHI | Monroe | 56 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2008Every severe thunderstorm warning in 2008
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.