Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 31, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 31, 2007, 7:39 PM EDT for Berks County, Lehigh County, Pennsylvania. It was in force for 51 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 31, 2007, 7:39 PM EDT (23:39 UTC)
- Expired
- May 31, 2007, 8:30 PM EDT
- In force
- 51 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Counties, with a storm outline in the text
Counties Berks County, PA, Lehigh County, PA
The radar
The Philadelphia radar (KDIX), 120 km from the middle of the area, began a volume at 23:41 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 31, 8:30 PM EDT | TSTM WND DMG | 7 Nw Alburtis, PA | TREES AND ELECTRIC POLES DOWN NEAR THE INTERSECTION OF OLD ROUTE 22 AND ROUTE 863 NEAR NEW SMITHVILLE IN WEISENBERG TOWNSHIP. |
| May 31, 8:30 PM EDT | HAIL 0.75 | 7 Nw Alburtis, PA | HAIL COVERED THE GROUND IN NEW SMITHVILLE, 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, 11.7 hours before the alert went out and 128 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1342 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 43 m²/s²
- 0-3 km storm-relative helicity
- 67 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 312340
SVRPHI
PAC011-077-010030-
/O.NEW.KPHI.SV.W.0031.070531T2339Z-070601T0030Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
739 PM EDT THU MAY 31 2007
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
EAST CENTRAL BERKS COUNTY IN EASTERN PENNSYLVANIA...
SOUTHEASTERN LEHIGH COUNTY IN EASTERN PENNSYLVANIA...
* UNTIL 830 PM EDT
* AT 737 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
A LARGE SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE
HAIL...AND DAMAGING WINDS AROUND 60 MPH. THIS STORM WAS LOCATED
ABOUT 10 MILES SOUTHWEST OF ALLENTOWN...AND MOVING SOUTHEAST AT 10
MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
ANCIENT OAKS BY 745 PM EDT...
EMMAUS BY 805 PM EDT...
THUNDERSTORMS ARE CAPABLE OF PRODUCING HEAVY RAINFALL WHICH MAY
RESULT IN LOCALIZED AREAS OF FLOODING. DO NOT DRIVE IN AREAS WHERE
WATER IS CROSSING THE ROAD.
LAT...LON 4061 7567 4052 7575 4041 7556 4054 7536
4060 7551
$$
JRP1 follow-up statement
000
WWUS51 KPHI 010007
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
806 PM EDT THU MAY 31 2007
PAC011-077-010030-
/O.CON.KPHI.SV.W.0031.000000T0000Z-070601T0030Z/
BERKS PA-LEHIGH PA-
806 PM EDT THU MAY 31 2007
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 8:30 PM EDT
FOR SOUTHEASTERN LEHIGH AND EAST-CENTRAL BERKS COUNTIES...
AT 8:00 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE AN AREA OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING NICKEL
SIZE HAIL...AND DAMAGING WINDS AROUND 60 MPH. THESE STORMS WERE
LOCATED NEAR MACUNGIE...OR ABOUT 10 MILES WEST-SOUTHWEST OF
ALLENTOWN...MOVING SOUTHEAST AT 5 TO 10 MPH.
THESE SEVERE THUNDERSTORMS WILL BE OVER RURAL EAST-CENTRAL BERKS
COUNTY AND SOUTHEASTERN LEHIGH COUNTY THROUGH 8:30 PM EDT. MOTORISTS
ALONG INTERSTATE 78 AS WELL AS THE NORTHEAST EXTENSION OF THE
PENNSYLVANIA TURNPIKE COULD ALSO BE AFFECTED BY THESE STORMS.
LAT...LON 4061 7567 4052 7575 4041 7556 4054 7536
4060 7551
$$
JRPThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 31, 5:43 PM EDT | Severe Thunderstorm Warning | PHI | Monroe | 40 min |
| May 31, 6:09 PM EDT | Flash Flood Warning | PHI | Monroe | 2 hr |
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.