Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 236, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Oct 19, 2007, 8:33 PM EDT for Berks County, Pennsylvania. It was in force for 35 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
- Oct 19, 2007, 8:33 PM EDT (00:33 UTC)
- Expired
- Oct 19, 2007, 9:08 PM EDT
- In force
- 35 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
County Berks County, PA
The radar
The Philadelphia radar (KDIX), 160 km from the middle of the area, began a volume at 00:36 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
Washington/Dulle, VA (KIAD), launched 00:00Z, 0.6 hours before the alert went out and 208 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
- 480 J/kg
- Mixed-layer CIN
- -17 J/kg
- Mixed-layer LCL
- 682 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 98 m²/s²
- 0-3 km storm-relative helicity
- 186 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 1.3
The text
As transmitted, in the capitals the NWS used until 2016.
000
WUUS51 KPHI 200033
SVRPHI
PAC011-200130-
/O.NEW.KPHI.SV.W.0236.071020T0033Z-071020T0130Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
833 PM EDT FRI OCT 19 2007
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHERN BERKS COUNTY IN EASTERN PENNSYLVANIA...
* UNTIL 930 PM EDT
* AT 832 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
OF 60 MPH. THIS STORM WAS LOCATED 8 MILES WEST OF STRAUSSTOWN...OR
ABOUT 24 MILES NORTHWEST OF READING...AND MOVING NORTHEAST AT 35
MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
STRAUSSTOWN BY 845 PM EDT...
HAMBURG BY 900 PM EDT...
6 MILES NORTHWEST OF LENHARTSVILLE BY 910 PM EDT...
THIS STORM DID PRODUCE WIND DAMAGE IN LEBANON COUNTY. SEEK SHELTER
NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS
LAT...LON 4053 7633 4052 7629 4054 7618 4056 7615
4058 7609 4059 7607 4059 7603 4064 7601
4067 7589 4048 7563 4033 7618 4049 7644
TIME...MOT...LOC 0033Z 242DEG 32KT 4050 7633
$$
TFG1 follow-up statement
000
WWUS51 KPHI 200108
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
908 PM EDT FRI OCT 19 2007
PAC011-200118-
/O.CAN.KPHI.SV.W.0236.000000T0000Z-071020T0130Z/
BERKS PA-
908 PM EDT FRI OCT 19 2007
...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN BERKS COUNTY IS
CANCELLED...
THE THUNDERSTORM HAS WEAKENED BELOW SEVERE LIMITS.
LAT...LON 4053 7633 4052 7629 4054 7618 4056 7615
4058 7609 4059 7607 4059 7603 4064 7601
4067 7589 4048 7563 4033 7618 4049 7644
TIME...MOT...LOC 0108Z 242DEG 32KT 4064 7596
$$
TFGThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 19, 8:55 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 33 min |
| Oct 19, 9:18 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 27 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2007Every severe thunderstorm warning in 2007
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.